Belt Clamp
A belt clamp is disclosed in which, for example, a pair of anti-slipping portions are arranged on a front surface (a surface provided with a toothed portion) at both ends in width direction of a belt body of a belt of the belt clamp. The pair of anti-slipping portions are disposed at a portion of a distal end of the belt body not having a toothed portion and so as not to overlap with the toothed portion in the width direction.
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This application claims the priority of Japanese Patent Application No. 2011-124774 filed on Jun. 3, 2011. The disclosure of the prior application is hereby incorporated herein in the entirety by reference.
BACKGROUND OF THE INVENTION1. Field of the Invention
The invention relates to a belt clamp for clamping an object to be clamped.
2. Description of the Related Art
In a vehicle, a belt clamp is used for attaching a wiring harness (a bundle of electric wires) to a body, etc.
The belt clamp is provided with an elongated strap-shaped belt and a buckle fastening a base end of the belt and having a belt insertion hole into which is inserted a distal end of the belt wound around an object to be clamped. The belt has on its one side a multiplicity of juxtaposed teeth which, when it is inserted into the belt insertion hole of the buckle, engage with a locking portion formed on the inside of the buckle. This serves to prevent the belt from disengaging from the belt insertion hole.
When using the belt clamp, the belt is wound around the object to be clamped and is inserted into the belt insertion hole of the buckle to allow the distal end of the belt to protrude from an outlet of the belt insertion hole by a predetermined length while engaging the teeth of the belt with the locking portion. To this end, the operator grasps and pulls the distal end of the belt. In this state, a predetermined tool (e.g., a tightening gun) is used to grasp the distal end of the belt and pull the belt against a resistance force of the locking portion trying to engage successively with the multiplicity of teeth so that the belt is cut off while clamping the object to be clamped.
Since the resistance force of the locking portion trying to engage with the teeth is relatively large, the operator may not be able to successfully grasp and pull the distal end of the belt due to the slip. This results in a lowered efficiency of the work of clamping the object to be clamped.
In order to prevent this, a belt clamp is disclosed whose belt has an anti-slipping portion formed at the distal end thereof (see Japanese Laid-open Patent Publication No. H9-40004). The formation of the anti-slipping portion, however, leads to an increased belt thickness, with the result that the buckle thickness also increases. An increased space is thus required for accommodating the belt clamp.
SUMMARY OF THE INVENTIONThe invention was conceived in view of the above circumstances and it is therefore an object thereof to provide a belt clamp hard to cause a slip when the operator pulls a belt, without altering the dimensions and thickness of the belt clamp.
To achieve the above object, according to the invention there is provided a belt clamp comprising an elongated strap-shaped belt having a flexibility capable of being wound around an outer circumferential surface of an object to be clamped; a buckle disposed at a base end of the belt and having a belt insertion hole for allowing insertion of the belt therethrough; a locking portion projecting toward a front surface of the belt inserted into the belt insertion hole; and a locked portion disposed on the front surface of the belt confronting the locking portion; the locking portion being disposed confronting part of the front surface of the belt, the locked portion being aligned on the front surface of the belt along a longitudinal direction thereof; near a tip of the belt extended from a region not having the locked portion on the front surface of the belt, an anti-slipping portion formed from alternate concaves and convexes being arranged in rows on the front surface of the belt along the longitudinal direction thereof.
The belt clamp according to the invention is thus configured and the anti-slipping portions of alternate concave and convex rows are arranged along the longitudinal direction on the front surface (the surface provided with the locked portion) of the belt in the vicinity of the tip thereof. When the operator inserts the tip of the belt engaged with the object to be clamped into the belt insertion hole of the buckle and pulls the tip projecting from the outlet thereof, the operator can pull it while pressing the anti-slipping portions with the result that a slip can hardly occur. This contributes to an improved efficiency in the clamping work of the object to be clamped.
At least two ridges extending along the longitudinal direction of the belt are formed at a predetermined interval on the front surface of the belt, the locked portion aligned being disposed in a row at a width of the interval between the ridges and inside the ridges along the belt longitudinal direction. In a belt region having the ridges thereon but not having the locked portion aligned, the ridges are formed with alternate concaves and convexes so that the ridges have a difference in height along the belt longitudinal direction, the concaves and convexes of the ridges functioning as the anti-slipping portion when the belt region is grasped.
The locked portion is disposed at a central portion in a width direction crossing to the longitudinal direction of the belt, and the anti-slipping portion is disposed at both ends of the belt in the width direction thereof and at portions not overlapping with the locked portion.
This prevents the anti-slipping portion from interfering with the locking portion of the buckle when the locked portion is inserted into the belt insertion hole.
Specifically, the anti-slipping portion is formed from a convexed portion and a concaved portion alternately disposed along the longitudinal direction of the belt, the convexed portion having a top surface coplanar with the front surface of the belt, the concaved portion having a bottom notched from the front surface of the belt in the direction of thickness.
Then, a wall surface of the anti-slipping portion toward at least the base end of the belt may be slanted or curved in front view of the belt, or a wall surface of the anti-slipping portion toward at least the base end of the belt may be slanted or curved with respect to the longitudinal direction of the belt in side view of the belt.
The length of the concaved portion of the anti-slipping portion in the longitudinal direction of the belt is preferably greater than the length of the convexed portion of the anti-slipping portion in the same direction.
These contribute to an increased degree of intimate contact of the anti-slipping portion with the operator's fingers and hence to even less slip.
On a surface opposite to the surface on which the locked portion is disposed in a row, the belt clamp may have, in the vicinity of the tip of the belt, the anti-slipping portion consisting of an alternate concave and convex row in the belt longitudinal direction. This belt clamp is provided with the anti-slipping portions on both surfaces of the belt, achieving an even less slip.
It is preferred that the anti-slipping portion disposed on the opposite surface of the belt be formed such that its tops do not protrude from the opposite surface. This allows the thickness of the belt of the belt clamp to be the same as that of the conventional one (in other words, not to become greater than that), resulting in no hindrance to the work of inserting the belt into the belt insertion hole of the buckle.
The belt clamp of the invention is available as a belt clamp hard to slip when the operator pulls the belt.
Preferred embodiments of the invention will now be described in detail.
An overall configuration of the belt clamp 1 of this embodiment will first be described hereinbelow. The belt clamp 1 is made of a resin material (e.g., polypropylene) and includes, as depicted in
The belt 3 will first be described. As depicted in
At a central portion in the width direction 13 on a surface of the belt body 11 except the distal end 11a, as depicted in
As depicted in
As depicted in
The anti-slipping portions 17 of the first embodiment will be described. As depicted in
It is to be noted that at the distal end 11a of the belt body 11, the toothed portion 14 is not disposed on a region between the pair of anti-slipping portions 17. A region between the pair of anti-slipping portions 17 is an inclined surface portion whose thickness continuously decreases according as it approaches the distal end 11a from a terminal end (a lower end) of the toothed portion 14, to thereby function as an insertion guide 21 upon the insertion into the belt insertion hole 4. In case of the anti-slipping portions 17 of the first embodiment, the pair of anti-slipping portions 17 have the same width. The width of the insertion guide 21 (i.e., the distance between the pair of anti-slipping portions 17) is equal to the width of the toothed portion 14.
As depicted in
The buckle 5 will next be described. As depicted in
At a substantial center in the width direction of an interior upper surface, i.e., a ceiling of the belt insertion hole 4, as depicted in
As depicted in
The engaging portion 8 will then be described briefly. As depicted in
As depicted in
Description will be made of an operation when clamping the wiring harness 2 using the belt clamp 1. As depicted in
When the distal end 11a of the belt body 11 protrudes from the outlet 4b of the belt insertion hole 4 to some extent, the operator presses and grasps the distal end 11a of the belt body 11 from top and bottom by his/her own fingers 18. At that time, the finger 18 pressing the front surface (i.e., the side provided with the pair of anti-slipping portions 17) of the belt body 11 enters into the space formed between the first inclined surface 19a and the second inclined surface 19b of the adjoining anti-slipping elements 19. In this state, the operator pulls the belt body 11 toward the direction indicated by the arrow 35. At this time, the substantially vertically formed second inclined surface 19b of the anti-slipping portion 19 functions to prevent the slip of the operator's fingers 18. By pulling the belt body 11 toward the direction of the arrow 35, the operator allows the locking piece 26 to enter into the space formed between the first tooth 15 and the second tooth 15 of the toothed portion 14. As depicted in
The operator then uses a predetermined tool (e.g., the tightening gun) to grasp and pull a portion of the distal end 11a of the belt body 11 protruding from the outlet 4b of the belt insertion hole 4. Since the pulling force at that time is larger by far than the engaging force of the toothed portion 14 of the belt body 11 with the locking piece 26, the belt body 11 is pulled while turning the teeth 15 in the direction thrusting up the locking piece 26. Then, the portion protruding from the buckle 5 of the belt body 11 is cut off while the wiring harness 2 is clamped.
In case of the belt clamp 1 of this embodiment, the anti-slipping portions 17 are disposed at the distal end 11a of the belt body 11. Since the operator can grasp these anti-slipping portions 17 to pull the belt body 11, a slip is hard to occur. In addition, since the thickness of the belt body 11 is unvaried regardless of the disposition of the anti-slipping portions 17, there is no need to change the thicknesses of the other members. Furthermore, since the anti-slipping portions 17 are disposed along the both edges in the width direction 13 (at portions not abutting against the locking piece 26) of the belt body 17, they are not a hindrance to passage of the buckle 5 through the belt insertion hole 4, so that the load on the locking piece 26 does not increase as a result of formation of the anti-slipping portions 17.
Second EmbodimentAnti-slipping portions 36 of a second embodiment will next be described. As depicted in
Anti-slipping portions 38 of a third embodiment will next be described. As depicted in
Anti-slipping portions 41 of a fourth embodiment will next be described. As depicted in
An anti-slipping portion 43 of a fifth embodiment will next be described. The anti-slipping portions 17, 36, 38, and 41 of the first to fourth embodiments described above are disposed in pairs at both ends of the belt body 11 in the width direction 13. As depicted in
Anti-slipping portions 45 and 46 of a sixth embodiment will next be described. The anti-slipping portions 17, 36, 38, 41, and 43 of the first to fifth embodiments described above are disposed on only the front surface of the belt body 11. As depicted in
As depicted in
In the belt clamp 1 of the first to fourth embodiments, the anti-slipping portions 17, 36, 38, and 41 are disposed in pairs (i.e., in twos) at both ends in the width direction 13 of the belt body 11. As in anti-slipping portions 49 of a seventh embodiment depicted in
As in an anti-slipping portion 51 of an eighth embodiment and an anti-slipping portion 52 of a ninth embodiment depicted in
Claims
1. A belt clamp comprising:
- an elongated strap-shaped belt having a flexibility capable of being wound around an outer circumferential surface of an object to be clamped;
- a buckle disposed at a base end of the belt and having a belt insertion hole for allowing insertion of the belt therethrough;
- a locking portion projecting toward a front surface of the belt inserted into the belt insertion hole; and
- a locked portion disposed on the front surface of the belt confronting the locking portion,
- the locking portion being disposed confronting part of the front surface of the belt, the locked portion being aligned on the front surface of the belt along a longitudinal direction thereof,
- near a tip of the belt extended from a region not having the locked portion on the front surface of the belt, an anti-slipping portion formed from alternate concaves and convexes being arranged in rows on the front surface of the belt along the longitudinal direction thereof.
2. The belt clamp of claim 1, wherein
- at least two ridges extending along the longitudinal direction of the belt are formed at a predetermined interval on the front surface of the belt, the locked portion aligned being disposed in a row at a width of the interval between the ridges and inside the ridges along the belt longitudinal direction, and wherein
- in a belt region having the ridges thereon but not having the locked portion aligned, the ridges are formed with alternate concaves and convexes so that the ridges have a difference in height along the belt longitudinal direction, the concaves and convexes of the ridges functioning as the anti-slipping portion when the belt region is grasped.
3. The belt clamp of claim 1, wherein
- the locked portion is disposed at a central portion in a width direction crossing to the longitudinal direction of the belt, and wherein
- the anti-slipping portion is disposed at both ends of the belt in the width direction thereof and at portions not overlapping with the locked portion.
4. The belt clamp of claim 1, wherein
- the anti-slipping portion is formed from a convexed portion and a concaved portion alternately disposed along the longitudinal direction of the belt, the convexed portion having a top surface coplanar with the front surface of the belt, the concaved portion having a bottom notched from the front surface of the belt in the direction of thickness.
5. The belt clamp of claim 4, wherein
- a wall surface of the anti-slipping portion toward at least the base end of the belt is slanted or curved in front view of the belt.
6. The belt clamp of claim 4, wherein
- a wall surface of the anti-slipping portion toward at least the base end of the belt is slanted or curved with respect to the longitudinal direction of the belt in side view of the belt.
7. The belt clamp of claim 4, wherein
- length of the concaved portion of the anti-slipping portion in the longitudinal direction of the belt is greater than length of the convexed portion of the anti-slipping portion in the same direction.
8. The belt clamp of claim 2, wherein
- the locked portion is disposed at a central portion in a width direction crossing to the longitudinal direction of the belt, and wherein
- the anti-slipping portion is disposed at both ends of the belt in the width direction thereof and at portions not overlapping with the locked portion.
9. The belt clamp of claim 2, wherein
- the anti-slipping portion is formed from a convexed portion and a concaved portion alternately disposed along the longitudinal direction of the belt, the convexed portion having a top surface coplanar with the front surface of the belt, the concaved portion having a bottom notched from the front surface of the belt in the direction of thickness.
10. The belt clamp of claim 3, wherein
- the anti-slipping portion is formed from a convexed portion and a concaved portion alternately disposed along the longitudinal direction of the belt, the convexed portion having a top surface coplanar with the front surface of the belt, the concaved portion having a bottom notched from the front surface of the belt in the direction of thickness.
11. The belt clamp of claim 5, wherein
- length of the concaved portion of the anti-slipping portion in the longitudinal direction of the belt is greater than length of the convexed portion of the anti-slipping portion in the same direction.
12. The belt clamp of claim 6, wherein
- length of the concaved portion of the anti-slipping portion in the longitudinal direction of the belt is greater than length of the convexed portion of the anti-slipping portion in the same direction.
Type: Application
Filed: May 18, 2012
Publication Date: Dec 6, 2012
Applicant: DAIWA KASEI INDUSTRY CO., LTD. (Aichi)
Inventor: Osamu Asai (Aichi)
Application Number: 13/474,778
International Classification: B65D 63/00 (20060101);