Scrubbing device and roll sponge assembly used therein
A roll sponge assembly for a scrubbing device includes a support having a support portion and a rotary shaft provided on two ends of the support portion, and a roll sponge having a hollow hole for holding the support by fitting the support portion of the support into the hollow hole. An outer diameter of the roll sponge assembly continuously or in stages increases in a lengthwise direction thereof.
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The present invention relates to a scrubbing device for cleaning a circular or a rectangular plate such as a magnetic disc substrate made of metal, glass or the like, a semiconductor wafer, and so on, and a roll sponge assembly used in the scrubbing device.
In recent years, magnetic disk drives have become smaller in size and expanded their range of applications, while it has been always demanded to further increase a recording density of a magnetic disc installed in the drive. A magnetic disk is manufactured by forming thin films such as a magnetic layer on a substrate made of glass or a metal such as aluminum. With regard to this type of magnetic disk, major progress has been made, in response to the demands described above, for the development of a substrate capable of reducing the distance (magnetic spacing) between a magnetic head and the magnetic disk. As disclosed in Patent Document 1: Japanese Unexamined Patent Application Publication No. H10-241144 (corresponding U.S. patents: U.S. Pat. No. 6,277,465, U.S. Pat. No. 6,503,600, and U.S. Pat. No. 6,877,343), for example, the surface of the substrate is subjected to precision polishing using fine polishing grains until a super-smooth substrate with a surface roughness Ra of 0.3 nm or less is obtained.
However, when particles are adhered to the substrate, a high degree of smoothness cannot be obtained regardless of the precision with which the substrate is polished, and therefore the cleaning method employed after the precision polishing is extremely important. As a demand for a high degree of smoothness increases, the size of the polishing grains used for the precision polishing has become smaller, so that even large grains are no larger than approximately 1 μm, while small grains are in a range of several tens of nanometers. Therefore, with respect to the required level of the cleanness and the size of the particles, it is extremely difficult to maintain a high level of cleaning quality at all the time.
Ultrasonic cleaning and scrubbing are known as typical methods for cleaning a substrate following precision polishing. As disclosed in Japanese Unexamined Patent Application Publication No. 2002-74653, with ultrasonic cleaning alone, comparatively large polishing agent residue can be removed, but it is still difficult to reliably remove minute residue such as those described above, and therefore a plurality of cleaning tanks is necessary, thereby increasing the cleaning time which adversely affects productivity. On the other hand, as to the scrubbing, as shown in
However, the scrubbing method described above has three problems, as follows:
(1) It is difficult to optimize the pressing force of the sponge against the substrate.
(2) When particles accumulate on the sponge, the substrate becomes recontaminated by the particles.
(3) A device for performing multi-stage scrubbing and overcoming problems (1) and (2) is large.
Problem (1) is due to the fact that particles of various materials and sizes become adhered to the cleaning target substrate. As described in Patent Document 2: Japanese Unexamined Patent Application Publication 2002-74653, in the precision polishing process, the material and size of the grains are varied in accordance with the required degree of smoothness, and therefore, the adhesive force between the substrate material and the grains, or in other words, the difficulty of removing the grains from the substrate, differs in each case. Furthermore, debris generated by substrate shavings and polishing pad shavings during polishing, dust produced by a device driving portion, and the like also become adhered to the substrate. Therefore, the type, size and shape of the particles adhered to the substrate vary widely.
In order to improve the cleaning force during scrubbing, an attempt to increase the force to press the roll sponge against the substrate has been conducted. As shown in
As regards problem (2), during the course of scrubbing, a roll sponge attached to a device processes a large amount of substrates, and therefore particles gradually accumulate on the roll sponge. As the particles accumulate, the particles return back to the substrate. As a result, a predetermined level of cleaning quality can no longer be obtained. Furthermore, as noted above in relation to problem (1), particles of various sizes, shapes and materials become trapped on the roll sponge, and therefore, depending on the trapped particles, defects such as scratches are caused continuously on the surface of subsequently processed substrates, thereby undermining the cleaning quality.
Regarding problem (3), multi-stage scrubbing has been tested in consideration of problems (1) and (2). However, since a series of devices, each comprising a driving portion, is required, such a device occupies a large amount of space and is not easy to maintain. Hence, there is a strong demand for measures to clean more efficiently.
An object of the present invention is to provide a scrubbing device and a roll sponge used therein that can solve the problems (1) to (3) described above.
Further objects and advantages of the invention will be apparent from the following description of the invention.
SUMMARY OF THE INVENTIONTo achieve the object, a roll sponge assembly for a scrubbing device according to the present invention comprises a support in which a support portion for holding a roll sponge and a rotary shaft provided on either side of the support portion are formed integrally, and a roll sponge that is held on the support by fitting the support portion of the support into a hollow hole of the roll sponge. The roll sponge assembly is formed so that the outer diameter thereof varies in a lengthwise direction.
Due to the shape described above, the support portion of the roll sponge assembly is formed so that the outer diameter thereof gradually and continuously increases in a lengthwise direction, while the roll sponge held on the support is formed so that the outer diameter thereof and the inner diameter of the hollow hole thereof vary continuously in accordance with the change of the outer diameter of the support portion.
Alternatively, the roll sponge assembly for a scrubbing device according to the present invention may be formed so that the outer diameter of the roll sponge held on the support and the inner diameter of the hollow hole are constant, for example.
Further, the roll sponge assembly for a scrubbing device according to the present invention comprises a support in which a support portion for holding a plurality of roll sponges and a rotary shaft provided on either side of the support portion are formed integrally, and a plurality of roll sponges that is held on the support by fitting the support portion of the support into a hollow hole in the plurality of roll sponges. The outer diameter of the support portion of the support in this roll sponge assembly may vary so as to increase in stages in a lengthwise direction, and the plurality of roll sponges may be formed so that the respective outer diameters thereof and the inner diameter of the hollow hole correspond to the plurality of outer diameters of the support portion which vary in stages, so that the respective outer diameters and the inner diameter of the hollow hole are constant in the lengthwise direction.
Further, the scrubbing device according to the present invention comprises at least a plurality of rollers that vertically supports and rotates a cleaning subject, and a pair of roll sponge assemblies disposed horizontally and parallel to each other. The scrubbing device cleans the cleaning subject by moving the cleaning subject in a lengthwise direction between the rotating pair of roll sponge assemblies.
Further, a scrubbing method according to the present invention comprises at least the steps of: rotating a cleaning subject while supporting the cleaning subject vertically using a plurality of rollers; rotating a pair of roll sponge assemblies disposed horizontally and parallel to each other; and moving the cleaning subject rotated by the plurality of rollers between the rotating pair of roll sponge assemblies in a lengthwise direction of the roll sponge assemblies.
In the present invention, the pressing force of the roll sponge in the roll sponge assembly of the scrubbing device against a cleaning substrate can be varied continuously in accordance with the movement of the substrate by varying the outer diameter of the roll sponge. In other words, by moving the cleaning substrate in the lengthwise direction of the roll sponge as scrubbing process goes on, a pressing force corresponding to the cleaning stage can be provided between the roll sponges. Furthermore, in the present invention, the substrate is moved in the lengthwise direction, and therefore different parts of the roll sponge can be continuously used in accordance with the each cleaning stage.
Moreover, in the present invention, only the outer diameter of the roll sponge for the scrubbing device needs to be varied. Therefore highly effective scrubbing corresponding to the cleaning stage can be provided during substrate cleaning without making the device further complicated.
Preferred embodiments of the present invention will be described with reference to the attached drawings.
First EmbodimentThe scrubbing device of this embodiment basically comprises a plurality of rollers 202 for supporting and rotating a cleaning subject 1, and a pair of roll sponge assemblies 201 for cleaning the cleaning subject 1.
In the scrubbing device according to this embodiment, the cleaning subject 1 is an annular magnetic disk substrate. As is evident from
Of the plurality of rollers 202, at least one performs rotational driving such that the driving force thereof rotates the substrate 1 via the support point. The other rollers 202 are rotated by the driving roller 202, thereby assisting the rotation of the substrate 1 while supporting the substrate 1 vertically. The plurality of rollers 202 are supported by a shaft, an arm, or the like (not shown in the drawing) and are constituted to be capable of moving while gripping and rotating the substrate 1 in a lengthwise direction of a roll sponge 203 (the direction of an arrow 205) such that relative positional relationships between the rollers remain unchanged. Note that the method of supporting or conveying the substrate 1 may be subjected to various modifications according to the structure of the substrate and the device construction, and is not limited to the method of this embodiment.
In this embodiment, as shown in
As shown in
The support 204 includes a support portion 204b and a rotary shaft 204a disposed at either end of the support portion 204b.
The support portion 204b has a substantially identical shape to the shape of the hollow hole 203c in the roll sponge 203. In other words, the support portion 204b takes a conical trapezoid shape having an outer diameter that gradually increases from D3 to D4 in the right-left direction of
In this embodiment, as shown in
As shown in
As described above, the cleaning subject substrate 1 moves from the right side to the left side of
An operation for cleaning the substrate 1 using the scrubbing device having the construction described above, and the effects thereof, will now be described using
As shown in
As shown in
Next, as shown in
Further, since the part of the roll sponge 203 used varies in the lengthwise direction in accordance with the degree of particles on the substrate 1, the accumulation of particles on the roll sponge 203 is dispersed in comparison with the related art, extending the maintenance lifespan of the roll sponge 203. Also, recontamination and the reoccurrence of damage such as scratches on the substrate 1 can be avoided in comparison with the related art, wherein only particular parts are used continuously.
Further, the roll sponge assembly 201 need only be provided in a pair, and therefore the rotary driving portions of the device need only correspond thereto, improving the maintainability of the device. Furthermore, there is no need for a multi-stage device including a plurality of units, as in the related art, and therefore identical effects to those of a multi-stage device can be obtained in a smaller space.
Second EmbodimentThis embodiment basically conforms to the first embodiment described above, but in consideration of the productivity of the expendable roll sponge 203, measures have been taken to adopt a conventional production method in which a constant-diameter roll sponge is simply cut for use. In other words, this embodiment differs from the first embodiment only in the structure of the roll sponge, and all other constitutions are completely identical to the first embodiment.
In this embodiment, as shown in
The outer diameter of the outside contour of the roll sponge 403 according to this embodiment is constant in the lengthwise direction and equal to the minimum outer diameter D2 of the roll sponge 203 according to the first embodiment. The inner diameter of a hollow hole 403c thereof is also constant in the lengthwise direction, and equal to the minimum inner diameter D3 of the hollow hole 203c in the roll sponge 203 of the first embodiment. Accordingly the thickness of the roll sponge 403 is also constant in the lengthwise direction.
Hence, the roll sponge 403 is formed as a hollow cylindrical body with a constant outer diameter and a constant inner diameter in the lengthwise direction, and therefore mass production is possible, enabling a reduction in the manufacturing cost of the scrubbing device in consideration of the fact that the roll sponge 403 is an expendable component of the scrubbing device.
The support 404 of this embodiment has an identical shape to its counterpart in the first embodiment, and includes a support portion 404b and a rotary shaft 404a disposed at either end of the support portion 404b.
The support portion 404b has a solid conical trapezoid shape having an outer diameter that increases gradually from D3 to D4 in the right-left direction of
In this embodiment, when the support portion 404b is fitted into the hollow hole 403c of the roll sponge 403, the flexibility of the roll sponge 403 causes the outside contour of the roll sponge 403 to imitate the outside contour of the support portion 404b and take the form of a conical trapezoid having a gradually increasing outer diameter. As a result, the roll sponge assembly 401 according to this embodiment has a substantially identical shape to the roll sponge assembly 201 (see
Hence, when the roll sponge assembly 401 of this embodiment is applied to a scrubbing device, completely identical actions and effects to those of the first embodiment can be obtained during the substrate cleaning.
Third EmbodimentThis embodiment also conforms to the first embodiment described above, but improves the shape of the roll sponge and the support for fixing and supporting the roll sponge. Therefore, this embodiment differs from the first embodiment only in the structure of the roll sponge assembly, and is completely identical to the first embodiment in all other constitutions.
In this embodiment, as shown in
Similarly to the roll sponge 203 of the first embodiment, the outside contour of the roll sponge 503 according to this embodiment has a conical trapezoid shape having an outer diameter that gradually increases from D2 to D1 in a right-left direction. A hollow hole 503c is formed in a central portion of the roll sponge 503. In contrast to the roll sponge 203 of the first embodiment, the inner diameter of the hollow hole 503c is constant in the lengthwise direction and equal to the minimum inner diameter D3 of the hollow hole 203c in the roll sponge 203 of the first embodiment. Therefore, the thickness of the roll sponge 503 gradually increases from right to left.
As described above, the roll sponge 503 of this embodiment is formed as a hollow cylindrical body having a constant inner diameter in the lengthwise direction, and is therefore easier to manufacture than the roll sponge 203 of the first embodiment, enabling a reduction in the manufacturing cost of the scrubbing device.
The support 504 according to this embodiment supports the roll sponge 503 and also functions as a rotary shaft of the roll sponge assembly 501. As shown in
The support 504 is fitted into the hollow hole 503c of the roll sponge 503 so as to fix and hold the roll sponge 503. Further, the part of the support 504 that penetrates the roll sponge 503 and projects from either end serves as a rotary shaft. As a result, the roll sponge assembly 501 according to this embodiment has a substantially identical shape to the roll sponge assembly 201 (see
Hence, when the roll sponge assembly 501 of this embodiment is applied to a scrubbing device, identical actions and effects to those of the first embodiment can be obtained when cleaning the substrate 1.
Fourth EmbodimentThis embodiment basically conforms to the first embodiment described above, but similarly to the second embodiment, measures have been taken in consideration of the productivity of the expendable roll sponge to adopt a conventional production method in which a constant-diameter roll sponge is simply cut for use. In other words, this embodiment essentially differs from the first embodiment only in the structure of the roll sponge assembly, and all other structures are absolutely identical to the first embodiment. Therefore, there are no substantial differences in the effects exhibited thereby.
In this embodiment, as shown in
The outer diameter of the outside contour of a small diameter roll sponge 303a according to this embodiment is constant in the lengthwise direction and equal to the minimum outer diameter D2 of the roll sponge 203 according to the first embodiment. The inner diameter of a hollow hole 303c is also constant in the lengthwise direction, and identical to the minimum inner diameter D3 of the hollow hole 203c in the roll sponge 203 according to the first embodiment. Therefore, the thickness of the small diameter roll sponge 303a is also constant in the lengthwise direction. Meanwhile, the outer diameter of the outside contour of a large diameter roll sponge 303b is constant in the lengthwise direction, similarly to the small diameter roll sponge 303a described above, but equal to the maximum outer diameter D1 of the roll sponge 203 according to the first embodiment. The inner diameter of a hollow hole 303d in the large diameter roll sponge 303b is constant in the lengthwise direction, similarly to the outer diameter of the outside contour, and equal to the maximum inner diameter D4 of the roll sponge 203 according to the first embodiment.
Hence, the roll sponge 303 is formed as a hollow cylindrical body having a constant outer diameter and a constant inner diameter in the lengthwise direction, and therefore mass production is possible, enabling a reduction in the manufacturing cost of the scrubbing device in consideration of the fact that the roll sponge 303 is an expendable component of the scrubbing device.
As shown in
As shown in
The first support portion 304b is formed as a solid cylindrical body having a constant outer diameter in the lengthwise direction, and has a substantially identical outer diameter D4 to the inner diameter of the hollow hole 303d in the large diameter roll sponge 303b. The length of the first support portion 304b in the lengthwise direction is preferably identical to the length of the large diameter roll sponge 303b, albeit not limited thereto. The first support portion 304b is fitted into the hollow hole 303d in the large diameter roll sponge 303b so as to fix and hold the large diameter roll sponge 303b.
The second support portion 304c supports the small diameter roll sponge 303a and also functions as a rotary shaft of the roll sponge assembly 301. As shown in
In the roll sponge assembly 301 of this embodiment, the outer diameter is varied in two stages, but the outer diameter is not limited thereto and may be varied in three or more stages. Furthermore, it goes without saying that the outer diameter and inner diameter of the roll sponge 303, the outer diameter of the support, and so on are not limited to the settings described above.
As shown in
Similarly to the first embodiment, the cleaning subject substrate 1 moves from the right side to the left side of
The operation to clean the substrate 1 that is performed by the scrubbing device of this embodiment having the constitution described above, and the effects thereof, although basically identical to the first embodiment, will now be described briefly with reference to
As shown in
As shown in
Next, as shown in
Further, since the usage site of the roll sponge 303 varies in the lengthwise direction from 303a to 303b in accordance with the cleaning stage of the substrate 1, the maintenance lifespan of the roll sponge 303 can be extended in this embodiment in a similar manner to the first embodiment. Also, recontamination and the reoccurrence of damage such as scratches on the substrate 1 can be avoided in comparison with the related art where only some particular parts are used continuously.
Further, the roll sponge assembly 301 needs only to be provided in a pair, and therefore the rotary driving portions of the device need only to be correspond thereto, enabling an improvement in the maintainability of the device. Furthermore, there is no need for a multi-stage device including a plurality of units, as in the related art. Therefore identical effects to those of a multi-stage device can be obtained in a smaller space.
Fifth EmbodimentThe roll sponge assembly according to this embodiment basically conforms to the fourth embodiment described above. In other words, the roll sponge assembly of this embodiment has a substantially identical structure to that of the fourth embodiment, and hence there are no substantial differences in the actions and effects in the fourth embodiment and this embodiment.
In this embodiment, as shown in
The roll sponge 603 according to this embodiment has a small diameter part 603a and a large diameter part 603b, and the small diameter part 603a and large diameter part 603b are formed continuously and integrally. The outer diameter of an outside contour of the small diameter part 603a of the roll sponge 603 is constant in the lengthwise direction and equal to the minimum outer diameter D2 of the roll sponge 203 according to the first embodiment. The inner diameter of a hollow hole 603c thereof is also constant in the lengthwise direction, and set at an inner diameter D5 that is slightly larger than the minimum inner diameter D3 of the hollow hole 203c in the roll sponge 203 of the first embodiment. In this embodiment, the inner diameter D5 of the small diameter part 603a differs from the fourth embodiment, but the inner diameter of the small diameter part 603a may be set at D3, as in the fourth embodiment.
On the other hand, the outer diameter of an outside contour of the large diameter part 603b of the roll sponge 603 is constant in the lengthwise direction, similarly to the small diameter roll sponge 603a described above, and equal to the maximum outer diameter D1 of the roll sponge 203 according to the first embodiment. The inner diameter of a hollow hole 603d in the large diameter part 603b is constant in the lengthwise direction, similarly to the outer diameter of the outside contour, and equal to the maximum inner diameter D4 of the roll sponge 203 of the first embodiment.
As shown in
As shown in
The first support portion 604b is formed as a solid cylindrical body (column) having a constant outer diameter in the lengthwise direction, and has a substantially identical outer diameter D4 to the inner diameter of the hollow hole 603d in the large diameter part 603b of the roll sponge. The length of the first support portion 604b in the lengthwise direction is preferably identical to the length of the large diameter part 603b of the roll sponge, albeit not limited thereto. The first support portion 604b is fitted into the hollow hole 603d in the large diameter part 603b of the roll sponge 603 so as to fix and hold the large diameter part 603b of the roll sponge.
The second support portion 604c fixes and supports the small diameter part 603a of the roll sponge 603. As shown in
Note that in the roll sponge assembly 601 of this embodiment, the outer diameter is varied in two stages, but the outer diameter is not limited thereto and may be varied in three or more stages. Furthermore, it goes without saying that the outer diameter and inner diameter of the roll sponge 603, the outer diameter of the support, and so on are not limited to the settings described above.
As a result, the roll sponge assembly 601 according to this embodiment has a substantially identical shape to the roll sponge assembly 301 according to the fourth embodiment. Therefore, when the roll sponge assembly 601 of this embodiment is applied to a scrubbing device, identical actions and effects to those of the fourth embodiment can be obtained when cleaning the substrate 1.
Sixth EmbodimentThis embodiment basically conforms to the fourth and fifth embodiments, but has been modified to use a single, constant-diameter roll sponge. In other words, this embodiment differs from the fifth embodiment only in the structure of the roll sponge, and all other structures are completely identical to the fifth embodiment.
In this embodiment, as shown in
The outer diameter of the outer contour of the roll sponge 703 according to this embodiment is constant in the lengthwise direction and equal to the outer diameter D2 of the small diameter part 603a of the roll sponge 603 according to the fifth embodiment. The inner diameter of a hollow hole 703c thereof is also constant in the lengthwise direction, and equal to the inner diameter D5 of the hollow hole 603c in the small diameter part 603a of the roll sponge 603 according to the fifth embodiment. Accordingly, the thickness of the roll sponge 703 is also constant in the lengthwise direction.
Hence, the roll sponge 703 is formed as a hollow cylindrical body having a constant outer diameter and a constant inner diameter in the lengthwise direction. Therefore, similarly to the second and fourth embodiments, mass production is possible, thereby enabling a reduction in the manufacturing cost of the scrubbing device in consideration of the fact that the roll sponge 703 is an expendable component of the scrubbing device.
The support 704 of this embodiment has a completely identical shape to that of the fifth embodiment, and therefore description thereof has been omitted.
A first support portion 704b and a second support portion 704c are fitted into the hollow hole 703c of the roll sponge 703 so as to fix and hold the roll sponge 703.
In this embodiment, similarly to the second embodiment, the roll sponge 703 is flexible, and therefore the outside contour of the roll sponge 703 imitates the outside contour of the first support portion 704b and second support portion 704c such that the outer diameter thereof varies in a plurality of stages. As a result, the roll sponge assembly 701 according to this embodiment takes a substantially identical shape to the roll sponge assembly 301 of the fourth embodiment.
Hence, when the roll sponge assembly 701 of this embodiment is applied to a scrubbing device, completely identical actions and effects to those of the fourth embodiment can be obtained during substrate cleaning.
Seventh EmbodimentThis embodiment basically conforms to the fourth embodiment described above, but is modified such that a plurality of roll sponges having hollow holes with identical inner diameters are used. Therefore, this embodiment differs from the fourth embodiment only in that the structure of the roll sponge and support has been simplified, and all other structures are completely identical to the fourth embodiment.
In this embodiment, as shown in
The roll sponge 803 according to this embodiment comprises a small diameter roll sponge 803a and a large diameter roll sponge 803b. The outer diameter of the outside contour of the small diameter roll sponge 803a is constant in the lengthwise direction and equal to the outer diameter D2 of the roll sponge 303a according to the fourth embodiment. The inner diameter of a hollow hole 803c thereof is also constant in the lengthwise direction, and identical to the outer diameter D3 of the support 804, as follows. The thickness of the small diameter roll sponge 803a is constant in the lengthwise direction. On the other hand, the outer diameter of the outside contour of the large diameter roll sponge 803b is constant in the lengthwise direction similarly to the small diameter roll sponge 803a described above, but equal to the outer diameter D1 of the roll sponge 303b according to the fourth embodiment. The inner diameter of a hollow hole 803d in the large diameter roll sponge 803b is constant in the lengthwise direction similarly to the outer diameter of the outside contour, and equal to the outer diameter D3 of the support 804, to be described below.
Hence, the roll sponge 803 is formed as a hollow cylindrical body having a constant outer diameter and a constant inner diameter in the lengthwise direction, and therefore mass production is possible, enabling a reduction in the manufacturing cost of the scrubbing device in consideration of the fact that the roll sponge 803 is an expendable component of the scrubbing device.
Similarly to the third embodiment, the support 804 of this embodiment supports the roll sponge 803 (more specifically, the small diameter roll sponge 803a and the large diameter roll sponge 803b), and also functions as a rotary shaft of the roll sponge assembly 801. As shown in
The support 804 is fitted into the hollow hole 803c of the small diameter roll sponge 803a and the hollow hole 803d of the large diameter roll sponge 803b so as to fix and hold the small diameter roll sponge 803a and large diameter roll sponge 803b. Further, the part of the support 804 that penetrates the roll sponge 803 and projects from either end is used as the rotary shaft.
As a result, the roll sponge assembly 801 according to this embodiment takes a substantially identical shape to the roll sponge assembly 301 of the fourth embodiment. Hence, when the roll sponge assembly 801 of this embodiment is applied to a scrubbing device, identical actions and effects to those of the fourth embodiment can be obtained during substrate cleaning.
Eighth EmbodimentThis embodiment basically conforms to the fourth, fifth and seventh embodiments described above.
In this embodiment, as shown in
The roll sponge 903 according to this embodiment comprises a small diameter part 903a and a large diameter part 903b, and the small diameter part 903a and large diameter part 903b are formed continuously and integrally. The outer diameter of the outside contour of the small diameter part 903a of the roll sponge 903 is constant in the lengthwise direction and equal to the outer diameter D2 of the small diameter roll sponge 303a according to the fourth embodiment. On the other hand, the outer diameter of the outside contour of the large diameter part 903b of the roll sponge 903 is constant in the lengthwise direction similarly to the small diameter roll sponge 903a described above, but equal to the outer diameter D1 of the large diameter roll sponge 303b according to the fourth embodiment. The inner diameter of a hollow hole 903c in the roll sponge 903 is constant in the lengthwise direction similarly to the outer diameter of the outside contour, and equal to the outer diameter D3 of the support 904, to be described below.
Hence, the roll sponge 903 of this embodiment is formed as a hollow cylindrical body having a constant inner diameter in the lengthwise direction, and therefore the roll sponge 903 can be manufactured more easily than the roll sponge 603 of the fifth embodiment, enabling a reduction in the manufacturing cost of the scrubbing device.
Similarly to the third embodiment, the support 904 of this embodiment supports the roll sponge 903 and also functions as a rotary shaft of the roll sponge assembly 901. As shown in
The support 904 is fitted into the hollow hole 903c of the roll sponge 903 so as to fix and hold the roll sponge 903. Further, the part of the support 904 that penetrates the roll sponge 903 and projects from either end is used as the rotary shaft.
As a result, the roll sponge assembly 901 according to this embodiment has a substantially identical shape to the roll sponge assembly 301 of the fourth embodiment. Hence, when the roll sponge assembly 901 of this embodiment is applied to a scrubbing device, identical actions and effects to those of the fourth embodiment can be obtained during substrate cleaning.
The disclosure of Japanese Patent Application No. 2007-123622, filed on May 8, 2007, is incorporated in the application.
While the invention has been explained with reference to the specific embodiments of the invention, the explanation is illustrative and the invention is limited only by the appended claims.
Claims
1. A roll sponge assembly for a scrubbing device, comprising:
- a support having a support portion and a rotary shaft provided on two ends of the support portion, and
- a roll sponge having a hollow hole, the support portion of the support being disposed in the hollow hole so that the roll sponge is held on the support,
- wherein an outer diameter of the roll sponge assembly continuously gradually increases in a lengthwise direction thereof.
2. A roll sponge assembly for a scrubbing device, comprising:
- a support having a support portion and a rotary shaft provided on two ends of the support portion, and
- at least one roll sponge having a hollow hole, the support portion of the support being disposed in the hollow hole so that the roll sponge is held on the support,
- wherein an outer diameter of the roll sponge assembly increases in stages in a lengthwise direction.
3. A roll sponge assembly according to claim 1, wherein
- an outer diameter of the support portion of the support continuously gradually increases in the lengthwise direction, and
- an outer diameter of the roll sponge and an inner diameter of the hollow hole vary continuously in accordance with a variation in the outer diameter of the support portion.
4. A roll sponge assembly according to claim 1, wherein
- an outer diameter of the support portion of the support continuously gradually increases in the lengthwise direction, and
- an outer diameter of the roll sponge and an inner diameter of the hollow hole are constant in the lengthwise direction.
5. A roll sponge assembly according to claim 1, wherein
- an outer diameter of the support portion of the support is constant in the lengthwise direction,
- an outer diameter of the roll sponge continuously gradually increases in the lengthwise direction, and
- an inner diameter of the hollow hole in the roll sponge is constant in the lengthwise direction.
6. A roll sponge assembly according to claim 2, wherein
- an outer diameter of the support portion of the support varies so as to increase in stages in the lengthwise direction, and
- the at least one roll sponge comprises a plurality of roll sponges formed such that outer diameters thereof and inner diameters of the hollow hole correspond to the outer diameters of the support portion varying in stages, and the respective outer diameters thereof and the inner diameters of the hollow holes are constant in the lengthwise direction.
7. A roll sponge assembly according to claim 2, wherein
- an outer diameter of the support portion of the support varies so as to increase in stages in a lengthwise direction, and
- an outer diameter of the at least one roll sponge and an inner diameter of the hollow hole vary in stages in accordance with the outer diameter of the support portion varying in stages.
8. A roll sponge assembly according to claim 2, wherein
- an outer diameter of the support portion of the support varies so as to increase in stages in the lengthwise direction, and
- an outer diameter of the at least one roll sponge and an inner diameter of the hollow hole are constant in the lengthwise direction.
9. A roll sponge assembly according to claim 2, wherein
- the at least one roll sponge comprises a plurality of roll sponges formed such that respective outer diameters thereof vary in stages, and the respective outer diameters and an inner diameter of the hollow holes are constant in the lengthwise direction.
10. A roll sponge assembly according to claim 2, wherein
- an outer diameter of the support portion of the support is constant in the lengthwise direction,
- an outer diameter of the at least one roll sponge varies in stages in the lengthwise direction, and
- an inner diameter of the hollow hole in the at least one roll sponge is constant in the lengthwise direction.
11. A scrubbing device, comprising:
- a plurality of rollers for vertically supporting and rotating a cleaning subject, and
- two of said roll sponge assemblies according to claim 1 disposed horizontally and parallel to each other,
- wherein the cleaning subject is cleaned by being moved in the lengthwise direction between the roll sponge assemblies rotating simultaneously.
12. A scrubbing device, comprising:
- a plurality of rollers for vertically supporting and rotating a cleaning subject, and
- two of said roll sponge assemblies according to claim 2 disposed horizontally and parallel to each other,
- wherein the cleaning subject is cleaned by being moved in the lengthwise direction between the roll sponge assemblies rotating simultaneously.
13. A cleaning subject scrubbing method, comprising the steps of:
- vertically supporting and rotating a cleaning subject using a plurality of rollers,
- rotating two roll sponge assemblies disposed horizontally and parallel to each other, each of said roll sponge assemblies including a support having a support portion and a rotary shaft provided on two ends of the support portion, and a roll sponge having a hollow hole, the support portion of the support being disposed in the hollow hole so that the roll sponge is held on the support, wherein an outer diameter of the roll sponge assembly continuously gradually increases in a lengthwise direction thereof, and
- moving the cleaning subject between the roll sponge assemblies in the lengthwise direction while the cleaning subject is being rotated by the plurality of rollers.
14. A cleaning subject scrubbing method, comprising the steps of:
- vertically supporting and rotating a cleaning subject using a plurality of rollers;
- rotating two roll sponge assemblies disposed horizontally and parallel to each other, each of said roll sponge assemblies including a support having a support portion and a rotary shaft provided on two ends of the support portion, and at least one roll sponge having a hollow hole, the support portion of the support being disposed in the hollow hole so that the roll sponge is held on the support, wherein an outer diameter of the roll sponge assembly increases in stages in a lengthwise direction, and
- moving the cleaning subject between the roll sponge assemblies in the lengthwise direction while the cleaning subject is being rotated by the plurality of rollers.
Type: Application
Filed: Mar 4, 2008
Publication Date: Nov 13, 2008
Applicant:
Inventor: Narumi Sato (Nagano)
Application Number: 12/073,289
International Classification: A46B 15/00 (20060101);