JP2677318B2 - cable tie - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable tie for binding cables, and more particularly to a structure for increasing the binding strength of a cable tie obtained by molding a resin.

[0002]

2. Description of the Related Art Conventionally, a cable tie has been used as a tool for binding a plurality of cables. This cable tie, as an example thereof is shown in FIG. 7A, is provided integrally with a strip-shaped band portion 100 and a base end portion of the band portion 100, and a lock for inserting and locking the band portion. It is composed of a part 200 and is integrally molded with a soft resin. In this cable tie, a plurality of cables CA to be bound are wrapped in a band portion, and then the band portion 10
When 0 is inserted from the tip side into the slit 201 of the lock part 200, the saw tooth band part 101 formed by arranging a plurality of saw teeth on one surface of the band part and the saw tooth provided facing the slit of the lock part 200. The lock piece 202 is engaged, the band portion 100 is locked at that position, and its withdrawal is locked, so that the cables can be bound.

[0003]

In such a conventional cable tie, the extraction is stopped by engaging the saw tooth band portion 101 of the band portion 100 with the saw tooth lock piece 202. 202 is configured to be elastically deformable in the lock portion to allow the band portion 100 to be inserted. Therefore, as shown in FIG. 7B, when a large force in the pulling direction is applied to the band portion in the bound state as shown by the arrow in the drawing, this force is transmitted from the sawtooth band portion 101 to the sawtooth lock piece 202, The sawtooth lock piece 202 may be deformed, and the engagement with the sawtooth band portion 101 may be lost. In an extreme case, the sawtooth lock piece 202 may be sheared from the base portion by a force larger than a predetermined value as shown in the figure. When the disengagement of the sawtooth lock piece 202 or the breakage of the sawtooth lock piece due to shearing occurs, it is impossible to lock the band portion, and the original function of the cable tie for binding the cables is impaired. An object of the present invention is to provide a cable tie in which the locking force of the band portion in the lock portion is increased to improve the reliability of cable tying.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a serrated band portion is formed on one surface of the serrated strip portion, which is wound around a cable to be bundled, and is integrated at the base end of the band portion. In a cable tie provided with a lock part for engaging with and locking the band part, the lock part is formed with an internal space including a slot through which the band part penetrates from the tip, and the base end is formed in this internal space. An elastically deformable sawtooth lock piece having a sawtooth that is connected to the lock part and engages with the sawtooth band part at the tip to lock the band part, and a sawtooth tooth when a force in the pulling direction is applied to the band part. Provided with stopper means for preventing excessive deformation of the lock piece .
Ri, the stopper means includes a hook portion integrally formed in a sawtooth lock piece, is composed of a stopper portion integrally formed on the lock portion so as to be opposed to the hook portion, the direction of the force pulling the band portion is added The hook portion engages with the stopper portion when the sawtooth lock piece is deformed. In this case, it is preferable that the hook portions are integrally formed on both side portions of the sawtooth lock piece, and the stopper portions are integrally formed on both side portions of the slot of the internal space. Further, a clip can be formed integrally with the lock portion.

[0005]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an overall view configuration of a first embodiment of the present invention, which is composed of a thin band-shaped band portion 1 and a lock portion 2 integrally formed at a base end of the band portion 1, It is integrally molded with a relatively flexible resin material. In the band portion 1, the width dimension of the tip portion 1a is narrowed in a taper shape,
It is configured so that it can be easily inserted into the slit 21 provided in the lock portion 2. Further, on one surface of the band portion 1, a sawtooth band portion 11 in which a plurality of saw teeth are continuously formed over a required length is integrally formed in a central portion excluding both side edge portions thereof.

The lock portion 2 is shown in an enlarged perspective view with a part cut away in FIG. 2, and FIGS. 3 (a) to 3 (d) show a front view and sectional views of lines AA, BB and CC thereof. As shown, the band portion is formed thicker than the band portion, and an internal space is formed through the substantially central portion thereof. The internal space has a slit 2 through which the band portion 1 can be inserted from the tip side.
1 and a lock piece storage chamber 22 that is slightly wider than the slit and that is adjacent to the slit 21. Further, a pair of stopper portions 23 extending in a rail shape along the length direction of the slits are provided at boundaries between the slits 21 and the lock piece storage chambers 22 on both sides in the width direction. It is integrally formed on the inner wall of the internal space.

A tongue-shaped sawtooth lock piece 24 having one end connected to the inner surface of the accommodation room and a plurality of sawteeth 25 integrally formed on the one surface is disposed in the lock piece storage chamber 22. . Further, hook portions 26 whose tip ends are bent toward the slit side are integrally formed on both side portions of the sawtooth lock piece 24, and are arranged to face one end portion of the stove bar portion 23. The hook portion 26 has a tapered base end side.

According to this structure, as shown in FIG. 4A, the band portion 1 is provided so as to enclose the cable CA to be bound.
After winding, the tip of the band 1 is inserted into the slit 21 of the lock 2, and the tip of the band 1 is pulled, whereby the ring diameter of the band 1 is reduced,
The cables CA are bound together. At this time, the sawtooth lock piece 24 of the lock portion 2 is elastically deformed at its base portion,
The saw tooth of the band portion 1 is the saw tooth 2 of the saw tooth lock piece 24.
It is possible to insert while overcoming 5. Then, when the fastening of the band portion is completed, the sawtooth band portion 11 is engaged with the sawtooth 25 of the sawtooth lock piece 24. In this state, the band portion 1 is locked to the lock portion 2 at the sawtooth band portion 11, and the bundled state of the cables CA is maintained.

In this state, when a force in the pull-out direction is applied to the band portion 1, the force of the band portion 1 is changed by the meshing of the saw tooth band portion 11 and the saw tooth lock piece 24.
4, and the force in the direction of the arrow in the figure is applied to the sawtooth lock piece 24. Therefore, the sawtooth lock piece 24 is deformed in the direction of the arrow and a large shearing force is applied to its base. However, as shown in FIG. 4B, as the saw tooth lock piece 24 is deformed, the hook portions 26 integrally formed on both sides of the saw tooth lock piece 24 are deformed downward and the stopper portion 23 is deformed.
The force in the arrow direction applied to the sawtooth lock piece 24 is received by the engagement between the hook portion 26 and the stopper portion 23. Therefore, the sawtooth lock piece 24 can be prevented from being further deformed, and the engagement with the sawtooth band portion 11 can be prevented from being released, or the engagement with the sawtooth band portion 11 due to shearing of the sawtooth lock piece 24 can be prevented. It is possible to prevent the connection from being impossible, and secure a strong binding of the cables CA. In this case, the hook portions 26 are integrally formed on both sides of the sawtooth lock piece 24, and the stopper portion 23 is integrally formed on the inner wall of the lock portion 2, so that the force in the pull-out direction can be received on both sides of the sawtooth lock piece 24. The deformation of the sawtooth lock piece 24 can be prevented even by an extremely strong pulling force.

[0010] Figure 5 is a cable tie to refer to the present invention the snapping relief Thailand, i.e. locking unit chassis and a substrate or the like (hereinafter, chassis, etc.) the second embodiment applied to the cable tie structure to be fitted and supported in a hole provided in the It is a perspective view of an example. In the figure, 1A is a band part and 2A is a lock part. Here, an anchor-shaped clip portion 3 is integrally formed on the bottom of the lock portion 2A, and a pair of elastic wing pieces 4 facing the clip portion 3 are integrally formed on both sides of the lock portion 2A. Cable ties with this configuration typically
Before binding the cable, insert the clip part 3 into the hole provided on the chassis etc.
When it is inserted, the anchor shape of the clip part 3 and the elastic wing piece 4 make a seal.
Hold the chassis etc. and fix the lock part to the chassis etc.
You.

Further , the lock portion is shown in FIGS. 6 (a) and 6 (b).
As shown in the front view and the partially broken side view,
The black portion 1A has substantially the same configuration as that of the first embodiment, but here,
Instead of the hook parts provided on both sides of the sawtooth lock piece 24,
And a stopper portion 28 is provided.
Approximately the entire length of the boundary between the rit 21 and the lock piece storage chamber 22
A configuration provided over a range is conceivable. In this configuration, the band portion 1A is wrapped around the cable, and the tip of the band portion 1A is locked to the lock portion 2
The slit 21 of A is inserted. As a result, the sawtooth band portion 11 engages with the sawtooth lock piece 24 to bind the cables, as in the first embodiment.

Further, when a force in the pulling direction is applied to the band portion 1A, this force is transmitted to the sawtooth lock piece 24 and the sawtooth lock piece 24 is slightly deformed. At this time, the flange portion 27 is also deformed. Thus, the sawtooth lock pieces 24 are prevented from being further deformed by colliding with the stopper portions 28. This prevents the sawtooth lock piece 24 and the sawtooth band portion 11 from being disengaged from each other, or the sawtooth lock piece 2
4 is prevented from being sheared, the engagement with the sawtooth band portion 11 is secured, and the reliability of the cable binding is improved as in the first embodiment. However, with this configuration
Since the lunge portion 27 is slippery on the surface of the stopper portion 28,
This slip causes deformation at the root of the sawtooth lock piece 24.
It is more likely to occur, and compared with the above embodiment of the present invention, the sawtooth lock
It cannot be denied that the effect of preventing disengagement of the piece 24 is low.

Although not shown, the clip portion 3 shown in the second embodiment may be provided in the lock portion 2 of the cable tie of the first embodiment. Further, the present invention can be similarly applied to a cable tie for fixing the lock portions 2 and 2A to the chassis or the like with screws. Further, in any of the above-described embodiments, when the binding of the cables CA is released, the tip end portion of the sawtooth lock piece 24 is hooked by a claw or the like and forcedly elastically deformed upward, so that the sawtooth lock piece 24 and The engagement with the sawtooth band portion 11 can be released, and the band portions 1 and 1A can be pulled out from the lock portions 2 and 2A.

[0014]

As described above, according to the present invention, since the lock portion for locking the band portion is provided with the stopper means for preventing the sawtooth lock piece from being deformed and moved, the band portion is pulled out. Even if the force of is applied, the sawtooth lock piece is prevented from being deformed and moved with it, and the engagement with the sawtooth band portion is prevented from being disengaged and the sawtooth lock piece is prevented from being sheared. There is an effect that it is possible to obtain a reliable cable tie for bundling cables. Further, since the stopper means is composed of the hook portion integrally formed with the sawtooth lock piece and the stopper portion integrally formed with the lock portion so as to face the hook portion, a force in the pulling direction is applied to the band portion. Since the hook portion is engaged with the stopper portion when the sawtooth lock piece is deformed, the sawtooth lock piece is effectively prevented from being deformed. In this case, the hook portion is integrally formed on both sides of the sawtooth lock piece, and the stopper portion is integrally formed on both sides of the slot of the internal space. Therefore, the deformation of the sawtooth lock piece can be effectively prevented even with an extremely strong force. Alternatively, the stopper means is composed of a flange portion integrally formed with the sawtooth lock piece and protruding in both directions, and a stopper portion provided at an internal position of the internal space facing the flange portions, whereby This has the effect of simplifying the configuration.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view in which a part of a lock portion is cut away.

FIG. 3 is a front view of a lock part and its AA line, BB line, CC
It is each sectional drawing of a line.

FIG. 4 is a cross-sectional view for explaining a bundled state of cables and an operation at that time.

FIG. 5 is a perspective view showing the overall configuration of a second embodiment of the present invention.

6A and 6B are a front view and a partially cutaway side view of a possible modification of the lock portion .

FIG. 7 is a cross-sectional view for explaining a conventional cable tie and its problems.

[Explanation of symbols]

 1, 1A Band part 2, 2A Lock part 3 Clip part 11 Sawtooth band part 23 Stopper part 24 Sawtooth lock piece 26 Hook part 27 Flange part 28 Stopper part

Claims (3)

(57) [Claims] 1. A band-shaped band portion having a sawtooth band portion formed on one surface and wound around a cable to be bound together with a base end of the band portion, and the band portion is engaged with the sawtooth band portion to form the band portion. And a lock unit for locking, wherein the lock unit is
An internal space including a slot through which the band portion penetrates from the tip is formed, and a base end is connected to the lock portion in the internal space, and the tip portion is engaged with the sawtooth band portion to form a band. an elastically deformable serrated locking piece having a saw-tooth for locking the parts, and a stopper means for suppressing excessive deformation of the sawtooth lock piece is provided when a force in the direction pulling the band portion is applied, said stopper Means before
A hook-shaped hook that is integrally formed with the sawtooth lock piece, and
Formed integrally with the lock part so as to face the hook part of
And the stopper part that is pulled out to the band part.
Direction force is applied to deform the sawtooth lock piece
A cable tie characterized in that the hook portion is engaged with the stopper portion . 2. The cable tie according to claim 1 , wherein the hook portion is integrally formed on both side portions of the sawtooth lock piece, and the stopper portions are integrally formed on both side portions of the slot of the internal space. 3. The cable tie according to claim 1, wherein the lock portion is integrally formed with a clip.