JPH0743411U - cable tie - Google Patents

Abstract

(57) [Abstract] [Purpose] In a cable tie with a structure in which cables are bundled at the band part and the band part is locked at the lock part,
The locking force of the band portion in the lock portion is increased to improve the reliability of cable bundling. A band part (1) having a sawtooth band part (11) and wound around a cable, and a lock part (2) which is integrated with a base end of the band part (1) and engages the sawtooth band part (11) to lock the band part (1). In the cable tie including the above, the lock portion 2 is provided with a sawtooth lock piece 23 having sawtooth 24 to be engaged with the sawtooth band portion 11, and the tip portion of the sawtooth lock piece 23 is locked by an elastically deformable connecting piece 25. The structure is connected to the section 2. Even if force is applied to the band portion 1 in the pulling direction, the connecting piece 25 prevents the sawtooth lock piece 23 from being largely deformed and moved, disengages from the sawtooth band portion 11, and the sawtooth lock piece 23 is removed. It is prevented from being sheared.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cable tie for binding cables, and more particularly to a structure for enhancing the binding strength of a cable tie obtained by molding a resin.

[0002]

[Prior art]

 Conventionally, a cable tie has been used as a tool for binding multiple cables. This cable tie, as shown in FIG. 9 (a), is provided integrally with a strip-shaped band portion 100 and a proximal 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, if a plurality of cables CA to be bound are wrapped in a band part and then the band part 100 is inserted from the distal end side into the slit 201 of the lock part 200, the plurality of cables CA are provided on one side of the band part. The sawtooth band portion 101 formed by arranging sawtooth teeth is engaged with the sawtooth lock piece 202 provided facing the slit of the lock portion 200, the band portion 100 is locked at that position, and its withdrawal is locked. The cables can be bound together.

[0003]

[Problems to be solved by the device]

 In such a conventional cable tie, the sawtooth band portion 101 of the band portion 100 is engaged with the sawtooth lock piece 202 to lock the pulling out of the band portion 100. In order to allow insertion, it is elastically deformable in the lock part. Therefore, as shown in FIG. 9 (b), 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 figure, this force is transmitted from the saw tooth band portion 101 to the saw tooth lock piece 202. The sawtooth lock piece 202 may be deformed, and the engagement with the sawtooth band portion 101 may be released. Further, in an extreme case, the saw-tooth lock piece 202 may be sheared from the base portion by a force larger than a predetermined force as shown in the figure. When the saw tooth lock piece 202 is disengaged or the saw tooth lock piece is broken due to shearing, the band portion cannot be locked, and the original function of the cable tie for bundling 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 enhanced to improve the reliability of cable tying.

[0004]

[Means for Solving the Problems]

 According to the present invention, a serrated band portion is formed on one surface, and a strip-shaped band portion is wound around a cable to be bound, and is integrated with the base end of the band portion, and is engaged with the serrated band portion to lock the band portion. In a cable tie having a lock part, the base part is connected to the lock part, and the tip part engages with the sawtooth band part in a slot in which the band part penetrates from the tip and is inserted into the lock part. An elastically deformable sawtooth lock piece having sawteeth for locking the band portion is provided, and the tip end portion of the sawtooth lock piece is connected to the lock portion by an elastically deformable connecting piece.

[0005]

[Action]

 Even if a force in the pulling direction is applied to the band while the band is engaged with the sawtooth lock piece in the lock section and the cables are bound together, the sawtooth lock piece can be deformed and moved significantly by the connecting piece. Is prevented, and disengagement from the saw tooth band portion and shearing of the saw tooth locking piece are prevented.

[0006]

【Example】

 Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of the first embodiment of the present invention, which is composed of a narrow band-shaped band portion 1 and a lock portion 2 integrally formed at the base end of the band portion 1. It is integrally molded from a relatively flexible resin material. The band portion 1 is configured such that the width dimension of the tip portion 1a is narrowed in a taper shape so that the band portion 1 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 the central portion excluding both side edge portions thereof.

The lock portion 2 is shown in FIG. 2 in an enlarged perspective view with a part cut away, and FIGS. 3 (a) to 3 (d) show a front view, a rear view, and sectional views taken along lines AA and BB, respectively. As shown, the band portion 1 is formed thicker than the band portion 1, and an internal space is formed at a substantially central portion thereof so that the band portion 1 can be inserted from the distal end side. It is composed of a slit 21 and a lock piece storage chamber 22 adjacent to the slit 21 and slightly wider than the slit.

In the lock piece storage chamber 22, a tongue-shaped sawtooth lock piece 23 is provided, the base end of which is connected to the inner surface of the storage room, and a plurality of sawteeth 24 are integrally formed on one surface of the lock piece storage chamber 22. To be done. A connecting piece 25 is provided at the tip of the sawtooth lock piece 24 to connect the tip to the inner surface of the storage chamber of the lock section 2. The connecting piece 25 extends obliquely upward from the tip of the sawtooth lock piece 23 and is configured to be slightly elastically deformable, but its thickness and width dimensions are set so that the amount of deformation is extremely small. Etc. are designed. In this embodiment, the connecting piece 25 is formed to have a width smaller than the width dimension of the sawtooth lock piece 23 at the center of the sawtooth lock piece 23 in the width direction. In order to integrally form the connecting piece 25 by resin molding, a die hole 26 is provided at the base end of the sawtooth lock piece 23.

According to this configuration, as shown in FIG. 4A, the band portion 1 is wound so as to enclose the cable CA to be bound, and the tip portion 1 a of the band portion 1 is locked to the lock portion 2. The ring diameter of the band portion 1 is reduced by inserting it through the slit 21 and pulling the tip portion 1a, so that the cable CA is bound. At this time, the sawtooth lock piece 23 of the lock portion 2 is elastically deformed at the base portion 23a thereof, so that the sawtooth band portion 11 of the band portion 1 can be inserted while passing over the sawteeth 24 of the sawtooth lock piece 23. At this time, since the connecting piece 25 has some elasticity, the sawtooth lock piece 23 can be elastically deformed when the band portion 1 is inserted into the slit 21. When the fastening of the band portion 1 is completed, the sawtooth band portion 11 is engaged with the sawtooth 24 of the sawtooth lock piece 23. 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 engagement of the saw tooth band portion 11 and the saw tooth lock piece 23 as shown in FIG. 4B. The force is generated in the lock piece 23, and a force in the direction of the arrow X in the drawing is applied to the sawtooth lock piece 23. Therefore, the sawtooth lock piece 23 is deformed in the same direction, and a large shearing force is applied to the base end portion 23a thereof. However, since the connecting piece 25 is formed at the tip of the sawtooth lock piece 23, the deformation of the sawtooth lock piece 23 in the arrow direction is prevented, and the engagement with the sawtooth band portion 11 is released. This can be prevented or the shearing of the sawtooth lock piece 23 can prevent the engagement with the sawtooth band portion 11 from being disabled, and a strong binding of the cable CA can be secured.

FIG. 5 shows an embodiment in which the present invention is applied to a cable tie called a snapping relief tie, that is, a cable tie in which a lock portion is fitted and supported in a hole provided in a chassis, a substrate or the like (hereinafter, chassis). It is a perspective view, and the same numerals are given to the portions equivalent to those of the first embodiment. Here, an anchor-shaped clip portion 3 is integrally formed on the bottom portion of the lock portion 2, and a pair of elastic wing pieces 4 facing the clip portion 3 are integrally formed on both sides of the lock portion 2.

Further, FIG. 6 shows a partially cutaway side view of only the lock portion, and FIGS. 7A to 7D show the front view, the rear view, the CC sectional view, and the DD sectional view. As shown in FIG. 5, the connecting piece 25A connecting the sawtooth lock piece 23 of the lock portion 2 to the lock portion 2 is formed in an L-shape with respect to the lock portion 2 by extending the tip end portion of the sawtooth lock piece 23 straightly. is doing. Then, by forming the thin grooves 27 on both sides of the portion where the connecting piece 25A and the lock portion 2 are connected to each other, the connecting piece 25A is provided with some elasticity. It should be noted that, in order to integrally form the connecting piece 25A, the punched hole 26 is formed in the sawtooth lock piece 23 as in the first embodiment.

In the cable tie having this configuration, when the clip portion 3 is normally inserted into a hole provided in the chassis or the like before the cables are bundled, the chassis of the anchor portion shape of the clip portion 3 and the elastic wing piece 4 is formed. Etc. are held and the lock part 2 is fixed to the chassis or the like. Then, the band portion 1 is wound around the cable, and the tip of the band portion 1 is inserted into the slit 21 of the lock portion 2. As a result, the sawtooth band portion 11 engages with the sawtooth lock piece 23 to bind the cables, as in the first embodiment.

Further, when a force in the pulling direction is applied to the band portion 1, this force is transmitted to the sawtooth lock piece 23 and the sawtooth lock piece 23 is slightly deformed. At this time, the connecting piece 25A The deformation of the sawtooth lock piece 23 is suppressed, the engagement between the sawtooth lock piece 23 and the sawtooth band portion 11 is prevented, or the sawtooth lock piece 23 is prevented from being sheared. It is the same as in the first embodiment that the reliability of the cable bundling is improved by ensuring the engagement.

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, as shown in FIG. 8, the present invention is similarly applied to a cable tie having a structure in which a ring member 5 is formed integrally with the lock portion 2 and the ring member 5 is used to fix it to a chassis or the like with a screw. Can be applied.

[0016]

[Effect of device]

 As described above, according to the present invention, the lock portion for locking the band portion is provided with the connecting piece for preventing the sawtooth lock piece from being deformed and moved, so that the pulling force is applied to the band portion. Even if the sawtooth lock piece is deformed, the sawtooth lock piece is prevented from being deformed and moved, the engagement with the sawtooth band portion is prevented from being disengaged, and the sawtooth lock piece is prevented from being sheared. This has the effect of obtaining a highly reliable cable tie.

[Brief description of 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 of the first embodiment is cut away.

3A and 3B are a front view, a rear view, and cross-sectional views taken along lines AA and BB, respectively, of the lock portion according to the first embodiment.

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

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

FIG. 6 is an enlarged perspective view in which a part of the lock portion of the second embodiment is cut away.

FIG. 7 is a front view and a rear view of a lock portion according to a second embodiment, and is a cross-sectional view of a CC line and a DD line thereof.

FIG. 8 is an overall perspective view of a modified example of the lock unit of the present invention.

FIG. 9 is a cross-sectional view for explaining a conventional cable tie and its defects.

[Explanation of symbols]

 1 band part 2 lock part 3 clip part 5 ring member 11 sawtooth band part 23 sawtooth lock piece 24 sawtooth 25, 25A connecting piece 26 punched hole 27 narrow groove

Claims (1)

[Scope of utility model registration request] 1. A band-shaped band part having a sawtooth band part formed on one surface and wound around a cable to be bound, and a band part integrated with the base end of the band part and engaging with the sawtooth band part to form the band part. And a lock unit for locking, wherein the lock unit is
An elastic deformation in which a base end portion is connected to the lock portion and a tip end is engaged with the saw tooth band portion to lock the band portion in a slot through which the band portion penetrates from the tip end and is inserted. A cable tie having a possible sawtooth lock piece, and a tip portion of the sawtooth lock piece is connected to the lock portion by an elastically deformable connecting piece.