PREFAB PACKAGING BOX

Abstract

The present invention provides a prefab packaging box including a side part having an opening formed at an upper or lower side thereof, and a cover part that is formed to extend from an upper or lower corner of the side part and finishes the opening by being folded by an external force, wherein the cover part includes a pair of support covers which are formed to extend from opposite corners of the side part and in which auxiliary insertion grooves are formed, an inner cover which is formed to extend from one corner of the side part in which the support covers are not formed and in which a main insertion groove is formed, an outer cover that is formed to extend from the other corner of the side part in which the support covers are not formed, a main catching member which is formed on one side of the outer cover, is inserted into the main insertion groove, and is then fastened to the inner cover and the support covers; and a pair of auxiliary catching members which are formed on both sides of the outer cover, are inserted into the auxiliary insertion grooves, and are then fastened to the support covers.

Description

TECHNICAL FIELD

The present invention relates to a prefab packaging box, and more particularly, to a prefab packaging box that can be tightly sealed without a separate string or a taping operation.

BACKGROUND ART

In general, various industrial products or various agricultural products are packaged and stored in a packaging box before being sold.

The most common form of such packaging boxes is a rectangular parallelepiped structure in which four sides of a floor stand up with an internal space formed therebetween and a cover is provided at an upper or lower side, and any one of various materials is selected as a material of the packaging box, but a corrugated cardboard is mainly used as the material of the packaging box.

Since the above conventional packaging boxes do not have a separate fixing unit for fixing an upper or lower cover, the packaging boxes are sealed by being tied using a string or attaching tape to a surface of the cover coming into contact therewith.

However, this method has disadvantages in that the process is cumbersome and inconvenient, a long work time is consumed, and since a sealing unit such as a separate string or tape should be provided, additional costs are required. Further, the boxes may be damaged while the attached tape is removed, and an accident may occur while the box sealed with a string or tape is opened using a box cutter.

According to the above problems, Korean Patent Registration No. 10-2201403 discloses a packaging box that provides a structure that enables a box to be coupled without using an auxiliary coupling unit such as adhesive tape. However, in the conventional packaging boxes, since the box is sealed using only a coupling part provided in a corner at a front surface of an external cover, corners of both sides of the external cover are not tightly sealed.

DISCLOSURE

Technical Problem

The present invention is directed to providing a prefab packaging box that can be tightly sealed without a separate string or a taping operation.

Technical Solution

One aspect of the present invention provides a prefab packaging box including: a side part having an opening formed at an upper or lower side; and a cover part that is formed to extend from an upper or lower corner of the side part and finishes the opening by being folded by an external force, wherein the cover part includes a pair of support covers which are formed to extend from opposite corners of the side part and in which auxiliary insertion grooves are formed, an inner cover which is formed to extend from one corner of the side part in which the support covers are not formed and in which a main insertion groove is formed, an outer cover that is formed to extend from the other corner of the side part in which the support covers are not formed, a main catching member which is formed on one side of the outer cover, is inserted into the main insertion groove, and is then fastened to the inner cover and the support covers, and a pair of auxiliary catching members which are formed on both sides of the outer cover, are inserted into the auxiliary insertion grooves, and are then fastened to the support covers.

The main catching member may be inserted into the main insertion groove in a state in which both ends of the main catching member are folded, may be then unfolded, and may be thus fastened to the inner cover and the support covers.

The auxiliary catching members may be inserted into the auxiliary insertion grooves in a state in which ends of the auxiliary catching members are folded, may be then unfolded, and may be thus fastened to the support covers.

Both sides of the main insertion groove may be bent at a predetermined angle so that an end of the main catching member is inserted thereinto in a folded state.

Sides of the auxiliary catching grooves may be bent at a predetermined angle so that ends of the auxiliary catching members are inserted thereinto in a folded state.

An end of the main catching member or the auxiliary catching members may have a predetermined internal angle.

The side part may have a pressing member formed at a position facing a portion in which the auxiliary catching members are arranged when the auxiliary catching members are inserted into the auxiliary insertion grooves.

Advantageous Effects

According to the present invention, a packaging box that can be tightly sealed without a separate string or a taping operation can be provided.

Meanwhile, the effects of the present invention are not limited to the above-described effects, and various effects may be included within the range apparent to those skilled in the art from the following description.

DESCRIPTION OF DRAWINGS

FIG. 1 is an entire view illustrating a prefab packaging box according to an embodiment of the present invention.

FIG. 2 is a development view illustrating the prefab packaging box according to the embodiment of the present invention.

FIG. 3 is a view illustrating a state in which a support cover of the prefab packaging box according to the embodiment of the present invention is folded.

FIG. 4 is a view illustrating a state in which the support cover and an inner cover of the prefab packaging box according to the embodiment of the present invention are folded.

FIG. 5 is a plan view illustrating the state in which the support cover and the inner cover of the prefab packaging box according to the embodiment of the present invention are folded.

FIG. 6 is a view illustrating a process in which an outer cover of the prefab packaging box according to the embodiment of the present invention is folded so that a main catching member and an auxiliary catching member are inserted.

FIG. 7 is a view illustrating a state in which the prefab packaging box according to the embodiment of the present invention is finished.

FIG. 8 is a view illustrating an internal fastening state of the prefab packaging box according to the embodiment of the present invention.

FIG. 9 is a view illustrating a process in which the finished prefab packaging box according to the embodiment of the present invention is opened.

FIG. 10 is a view illustrating a folding portion of the prefab packaging box according to the embodiment of the present invention.

FIG. 11 is a view illustrating a process in which the folding portion of the prefab packaging box according to the embodiment of the present invention is fixed to the inner cover again.

MODES OF THE INVENTION

Hereinafter, some embodiments of the present invention will be described in detail with reference to the exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that identical or equivalent components are designated by an identical numeral even when they are displayed on other drawings.

Further, in describing the embodiment of the present invention, a detailed description of the related known configuration or function will be omitted when it is determined that it interferes with the understanding of the embodiment of the present invention.

Further, in the description of the components of the embodiments of the present invention, the terms such as first, second, A, B, (a), and (b) may be used. These terms are merely intended to distinguish one component from other components, and the terms do not limit the nature, order, or sequence of the components.

Hereinafter, a prefab packaging box 100 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an entire view illustrating a prefab packaging box according to an embodiment of the present invention, FIG. 2 is a development view illustrating the prefab packaging box according to the embodiment of the present invention, FIG. 3 is a view illustrating a state in which a support cover of the prefab packaging box according to the embodiment of the present invention is folded, FIG. 4 is a view illustrating a state in which the support cover and an inner cover of the prefab packaging box according to the embodiment of the present invention are folded, FIG. 5 is a plan view illustrating the state in which the support cover and the inner cover of the prefab packaging box according to the embodiment of the present invention are folded, FIG. 6 is a view illustrating a process in which an outer cover of the prefab packaging box according to the embodiment of the present invention is folded so that a main catching member and an auxiliary catching member are inserted, FIG. 7 is a view illustrating a state in which the prefab packaging box according to the embodiment of the present invention is finished, FIG. 8 is a view illustrating an internal fastening state of the prefab packaging box according to the embodiment of the present invention, and FIG. 9 is a view illustrating a process in which the finished prefab packaging box according to the embodiment of the present invention is opened.

As illustrated in FIGS. 1 to 9, a prefab packaging box 100 according to the embodiment of the present invention includes a side part 110 and a cover part 120.

The side part 110 has a plurality of side surfaces of which side edges are mutually connected to form an opening at an upper or lower side, and the side part 110 may be provided in a shape of a polyhedron or a three-dimensional figure, but is preferably formed in a rectangular parallelepiped shape for convenience during packaging or transportation.

In the side part 110, when an auxiliary catching member 125, which will be described below, is inserted into an auxiliary insertion groove h2, a pressing member 111 is formed at a position facing a portion in which the auxiliary catching member 125 is disposed, and a detailed description of the pressing member 111 will be made below.

The cover part 120 finishes the upper or lower opening by being folded inward by an external force and is formed to extend upward or downward from an upper or lower corner of the side part 110.

Meanwhile, since the cover part 120 formed to extend downward from the lower corner of the side part 110 is symmetrical to the cover part 120 formed to extend upward from the upper corner of the side part 110, a detailed description thereof will be omitted.

In more detail, the cover part 120 includes a support cover 121, an inner cover 122, an outer cover 123, a main catching member 124, and an auxiliary catching member 125.

The support cover 121 is folded inward by an external force and then supports the inner cover 122 and the outer cover 123 which will be described below, and provided as a pair of support covers 121 that are formed to extend from opposite corners of the side part 110 (corners of a left surface and a right surface of the side part 110 with respect to the inner cover 122 in FIG. 1).

The auxiliary insertion groove h2 is formed in one side of the support cover 121 so that the auxiliary catching member 125 may be inserted into the auxiliary insertion groove h2. That is, the auxiliary insertion groove h2 is formed in a corner in which the support cover 121 and the side part 110 are connected and is formed at a position corresponding to the auxiliary catching member 125 so that the auxiliary catching member 125, which will be described below, may be inserted into the auxiliary insertion groove h2, and a detailed description of the auxiliary insertion groove h2 will be described below.

Meanwhile, a protective member 121a may be formed outside the auxiliary insertion groove h2 formed in the support cover 121. The protective member 121a protects the auxiliary catching member 125 inserted into the auxiliary insertion groove h2 in a state in which the opening is finished by the inner cover 122 and the outer cover 123, which will be described below, and is formed to extend upward by as much as the thickness of the outer cover 123 as illustrated in FIG. 7. According to the protective member 121a, the outer cover 123 can be prevented from being opened by damaging to the auxiliary catching member 125 inserted into the auxiliary insertion groove h2 due to an external impact during transportation or delivery.

The inner cover 122 is folded inward by an external force in a state in which the pair of support covers 121 are folded inward and is formed to extend from one corner of the side part 110 in which the support cover 121 is not formed (a corner of a front surface of the side part 110 in FIG. 1).

The inner cover 122 includes a base portion 122a and an extension portion 122b.

The base portion 122a is formed to extend from one corner of the side part 110 in which the support cover 121 is not formed, it is preferable that a horizontal width thereof be formed to extend to be the same width as a width of the one corner of the side part 110 in which the support cover 121 is not formed (the corner of the front surface of the side part 110 in FIG. 1), and it is preferable that a vertical width thereof be formed to extend to be a half of a corner of the side part 110 in which the support cover 121 is formed (a corner of the left surface or the right surface of the side part 110 in FIG. 1).

The extension portion 122b is formed to extend from the base portion 122a. In this case, the extension portion 122b extends and is formed to have a width smaller than the width of the base portion 122a so as to avoid interference when the auxiliary catching member 125, which will be described below, is inserted into the auxiliary insertion groove h2.

In the inner cover 122, a main insertion groove h1 is formed at a position corresponding to the main catching member 124 so that the main catching member 124 may be inserted thereinto, and a detailed description of the main insertion groove h1 will be described below.

The outer cover 123 is folded inward by an external force and then finishes the opening together with the inner cover 122 in a state in which the inner cover 122 is folded inward, and is formed to extend from the other corner of the side part 110 in which the support cover 121 is not formed (a corner of a rear surface of the side part 110 with respect to the inner cover 122 in FIG. 1).

In this case, it is preferable that a horizontal width thereof extend and be formed to be the same width as the width of the one corner of the side part 110 in which the support cover 121 is not formed (the corner of the front side of the side part 110 in FIG. 1), and it is preferable that a vertical width thereof extend and be formed to be the half of the corner of the side part 110 in which the support cover 121 is formed (the corner of the left side or the right side of the side part 110 in FIG. 1).

The main catching member 124 is inserted into the main insertion groove h1 formed in the inner cover 122 and is then fastened to the inner cover 122 and the pair of support covers 121, and is formed to extend from one side, that is, a central portion of the corner of the front surface, of the outer cover 123.

In more detail, the main catching member 124 includes a main extension piece 124a and a main catching piece 124b.

The main extension piece 124a is formed to extend from a central portion of one corner of the outer cover 123, and has the main catching pieces 124b, which will be described below, formed at both ends thereof.

The main catching pieces 124b extend from both ends of the main extension piece 124a and are folded, and have ends inclined with a predetermined internal angle so that the main catching member 124 may be easily inserted into the main insertion groove h1.

In this case, as illustrated in FIG. 8, the main extension piece 124a is formed to have the same length as the length of a space between the pair of folded support covers 121, and the main catching pieces 124b are formed to extend from both ends of the main extension piece 124a. Therefore, after the main catching pieces 124b of the main catching member 124 are inserted into the main insertion groove h1 while folded to fit into the main insertion groove h1, when the pair of main catching pieces 124b are unfolded in an inner space of the packaging box, the pair of unfolded main catching pieces 124b may be fastened to the pair of support covers 121 as well as the inner cover 122, and thus the outer cover, the inner cover, and the support covers can be tightly coupled to each other.

Further, portions, that is, both sides, of the main insertion groove h1 corresponding to the main catching pieces 124b of the main catching member 124 are formed to be bent at a predetermined angle.

Meanwhile, as illustrated in FIG. 5, both sides of the main insertion groove h1 are bent toward the extension portion 122b so that a user can easily assemble the packaging box, and a predetermined bending angle may be an angle between 30° and 60° based on the one corner of the outer cover 123, but is preferably 45°.

In more detail, when both sides of the main insertion groove h1 are bent by more than 60°, the main catching pieces 124b of the main catching member 124 are excessively folded and thus the main catching pieces 124b may be damaged. When both sides of the main insertion groove h1 are bent by less than 30°, the main catching member 124 inserted into the main insertion groove h1 is not properly fastened and is separated again, and thus the packaging box cannot be sealed.

The auxiliary catching member 125 is provided as a pair of auxiliary catching members 125, and the auxiliary catching members 125 are inserted into the auxiliary insertion grooves h2 and then fastened to the support covers 121, and are formed to extend from both sides, that is, the corners of the left side and the right side, of the outer cover 123.

In more detail, the auxiliary catching member 125 includes an auxiliary extension piece 125a and an auxiliary catching piece 125b.

The auxiliary extension piece 125a is formed to extend from the corner of the left side or the right side of the outer cover 123, and has the auxiliary catching piece 125b, which will be described below, formed to extend from at one end thereof.

The auxiliary catching piece 125b, which extends from one end of the auxiliary extension piece 125a and is folded, has an end having a triangular shape having a predetermined internal angle so that the auxiliary catching member 125 may be easily inserted into the auxiliary insertion groove h2.

In more detail, the auxiliary catching piece 125b is provided in a triangular shape having an internal angle of approximately 60° at an end thereof. In this case, when the internal angle at the end is formed to be less than 60°, a length of the auxiliary catching piece 125b is too long, proper strength cannot be secured, and thus the auxiliary catching piece 125b is damaged by an external force, and the support cover 121 and the outer cover 123 are easily separated. When the internal angle at the end is formed to be 60° or more, the length of the auxiliary catching piece 125b is too short, the auxiliary catching piece 125b, which is inserted into the inner space of the packaging box and is then unfolded, is not sufficiently fastened to the support cover 121, and thus the support cover 121 and the outer cover 123 are easily separated.

That is, the auxiliary catching member 125 is fastened to the support cover 121 as the auxiliary catching piece 125b is inserted into the auxiliary insertion groove h2 while folded to fit into the auxiliary insertion groove h2 of the support cover 121 and is then unfolded in the inner space of the auxiliary catching piece 125b.

In this case, a portion, that is, one side, of the auxiliary insertion groove h2 corresponding to the auxiliary catching piece 125b of the auxiliary catching member 125 is formed to be bent at a predetermined angle.

Meanwhile, as illustrated in FIG. 5, one side of the auxiliary insertion groove h2 is bent inward so that the user can easily assemble the packaging box, and a predetermined bending angle may be an angle between 45° and 75° based on one corner of the support cover 121, but is preferably 60°.

In more detail, when the one side of the auxiliary insertion groove h2 is bent by more than 75°, the auxiliary catching piece 125b of the auxiliary catching member 125 is excessively folded and thus the auxiliary catching piece 125b may be damaged. When the one side of the auxiliary insertion groove h2 is bent by less than 45°, the auxiliary catching member 125 inserted into the auxiliary insertion groove h2 is not properly fastened and is separated again, and thus the packaging box cannot be sealed.

According to the main catching member 124 and the auxiliary catching member 125, the outer cover 123 may be tightly fastened not only to the inner cover 122 but also to the pair of support covers 121, and thus the packaging box can be more tightly sealed, and corners of side surfaces of the packaging box are more tightly finished.

Meanwhile, when the auxiliary catching member 125 is inserted into the auxiliary insertion groove h2 and is unfolded, the pressing member 111 is formed at a position facing a portion of the side part 110 in which the auxiliary catching member 125 is disposed.

That is, as illustrated in FIG. 9, the pressing member 111 presses the auxiliary catching piece 125b of the auxiliary catching member 125 to separate the outer cover 123 from the support cover 121 in a state in which the opening is finished, and is formed at a position facing a portion at which the auxiliary catching piece 125b of the auxiliary catching member 125 is disposed.

In more detail, the pressing member 111 has a perforated line formed in a portion thereof and is provided such that one corner thereof may be folded. When the pressing member 111 is pressed by a finger, a portion of the pressing member 111 is cut along the perforated line, and the pressing member 111 is then folded inward. Thereafter, when the auxiliary catching piece 125b is appropriately adjusted to correspond to the auxiliary insertion groove h2 through the pressing member 111 folded inward, the auxiliary catching member 125 may be separated from the auxiliary insertion groove h2, and the outer cover 123 may be separated from the support cover 121.

According to the pressing member 111, the assembled packaging box can be reused, and whether a product is damaged or lost can be identified according to whether the pressing member 111 is separated.

According to the prefab packaging box 100 according to the embodiment of the present invention including the side part 110 and the cover part 120, the packaging box can be tightly sealed without a separate string or a taping operation. From now on, a process of assembling and separating the prefab packaging box 100 according to the embodiment of the present invention will be described with reference to FIGS. 3 to 9.

In the description of the process of assembling the prefab packaging box 100 according to the present invention, as illustrated in FIGS. 3 and 4, first, the pair of support covers 121 are folded inward, and the inner cover 122 is then folded inward. Thereafter, as illustrated in FIG. 6, when the main catching member 124 and the auxiliary catching member 125 of the outer cover 123 are properly folded to fit into the main insertion groove h1 and the auxiliary insertion groove h2 and are then inserted into and fastened to the main insertion groove h1 and the auxiliary insertion groove h2, as illustrated in FIGS. 7 and 9, the outer cover 123 is tightly coupled to the inner cover 122 and the support cover 121, and thus the packaging box is completely assembled.

Next, in the description of the process of separating the prefab packaging box 100 according to the present invention, as illustrated in FIG. 8, first, the pressing members 111 formed on both sides of the side part 110 are folded inward by being pressed by fingers. Thereafter, the auxiliary catching piece 125b of the auxiliary catching member 125 is appropriately adjusted through the pressing member 111 to correspond to the auxiliary insertion groove h2, and the auxiliary catching member 125 is extracted from the auxiliary insertion groove h2. Next, when the main catching member 124 is extracted from the main insertion groove h1, the outer cover 123 may be separated from the inner cover 122 and the support cover 121.

Meanwhile, after the prefab packaging box 100 according to the present invention is assembled, the main catching member 124 inserted into the main insertion groove h1 should be extracted to separate the outer cover 123 from the inner cover 122. However, it is difficult to extract the main catching member 124 due to the main catching piece 124b unfolded in the inner space of the packaging box.

Accordingly, the inner cover 122 according to the present invention includes a folding portion 122c.

FIG. 10 is a view illustrating a folding portion of the prefab packaging box according to the embodiment of the present invention, and FIG. 11 is a view illustrating a process in which the folding portion of the prefab packaging box according to the embodiment of the present invention is fixed to the inner cover again.

As illustrated in FIG. 10, the portion part 122c forms an opening so that the main catching member 124 may be easily extracted, a pair of cut lines c are formed in the inner cover 122 at a position facing the main catching member 124 disposed to be inserted into the main insertion groove h1, and the folding portion 122c is formed as the pair of cut lines c are cut and folded outward. In this case, it is preferable that the pair of cut lines c be formed in a direction opposite to a direction in which the main insertion groove h1 is bent.

That is, the opening is formed when the folding portion 122c is folded outward after the inner cover 122 is cut along the pair of cut lines c, and through the opening, the main catching member 124 may be easily extracted, and the outer cover 123 and the inner cover 122 may be separated.

Meanwhile, when the folding portion 122c is folded outward after the inner cover 122 is cut along the pair of cut lines c, even when the main catching member 124 is inserted into and fastened to the main insertion groove h1 again, the main catching member 124 is easily separated through the opening, making it difficult to reuse the packaging box.

Accordingly, the folding portion 122c according to the present invention includes a first fixing member 122c1 and a second fixing member 122c2.

As illustrated in FIG. 11, the first fixing member 122cl and the second fixing member 122c2 also fix the folding portion 122c to the inner cover 122. Folding lines f are formed at an end of the folding portion 122c, the first fixing member 122cl and the second fixing member 122c2 are formed along the folding line f, and the cut lines c are formed at edges of the first fixing member 122cl and the second fixing member 122c2.

That is, the first fixing member 122cl and the second fixing member 122c2 are formed to protrude when the folding portion 122c is cut along the cut lines c and the end of the folding portion 122c is then folded inward along the folding lines f. In this case, when the first fixing member 122cl is in contact with one surface of the inner cover 122, the second fixing member 122c2 is in contact with the other surface of the inner cover 122, and thus the folding portion 122c can be fixed to the inner cover 122 again.

According to the prefab packaging box 100 according to the embodiment of the present invention including the side part 110 and the cover part 120, the packaging box that can be tightly sealed without a separate string or a taping operation can be provided.

Hereinabove, even though it has been described that all components constituting embodiments of the present invention are combined into one part or are operated while combined with each other, the present invention is not necessarily limited to these embodiments. That is, all the components may be operated while selectively combined into one or more parts within the scope of the present invention.

Further, terms such as “includes”, “constitutes”, and “have” described above mean that the corresponding component may be inherent unless otherwise stated, and thus should be construed as not excluding other components but further including other components. All terms including technical or scientific terms have the same meanings as those commonly understood by those skilled in the art to which the present invention pertains unless otherwise defined. The generally used terms defined in the dictionaries should be construed as having the meanings that coincide with the meanings of the contexts of the related technologies, and should not be construed as ideal or excessively formal meanings unless clearly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and those skilled in the art to which the present invention belongs may make various modifications and changes without departing from the essential features of the present invention.

Thus, the embodiments disclosed in the present invention are not intended to limit the technology spirit of the present invention, but are intended to describe the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the appended claims, and all technical spirits within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims

1. A prefab packaging box comprising:

a side part having an opening formed at an upper or lower side; and

a cover part that is formed to extend from an upper or lower corner of the side part and finishes the opening by being folded by an external force,

wherein the cover part includes:

a pair of support covers which are formed to extend from opposite corners of the side part and in which auxiliary insertion grooves are formed;

an inner cover which is formed to extend from one corner of the side part in which the support covers are not formed and in which a main insertion groove is formed;

an outer cover that is formed to extend from the other corner of the side part in which the support covers are not formed;

a main catching member which is formed on one side of the outer cover, is inserted into the main insertion groove, and is then fastened to the inner cover and the support covers; and

a pair of auxiliary catching members which are formed on both sides of the outer cover, are inserted into the auxiliary insertion grooves, and are then fastened to the support covers.

2. The prefab packaging box of claim 1, wherein the main catching member is inserted into the main insertion groove in a state in which both ends of the main catching member are folded, is then unfolded, and is thus fastened to the inner cover and the support covers.

3. The prefab packaging box of claim 1, wherein the auxiliary catching members are inserted into the auxiliary insertion grooves in a state in which ends of the auxiliary catching members are folded, are then unfolded, and are thus fastened to the support covers.

4. The prefab packaging box of claim 2, wherein both sides of the main insertion groove are bent at a predetermined angle so that an end of the main catching member is inserted thereinto in a folded state.

5. The prefab packaging box of claim 3, wherein sides of the auxiliary catching grooves are bent at a predetermined angle so that ends of the auxiliary catching members are inserted thereinto in a folded state.

6. The prefab packaging box of claim 1, wherein an end of the main catching member or the auxiliary catching members has a predetermined internal angle.

7. The prefab packaging box of claim 1, wherein the side part has a pressing member formed at a position facing a portion in which the auxiliary catching members are arranged when the auxiliary catching members are inserted into the auxiliary insertion grooves.