JP3147015B2 - Wire binding tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire tying tool, and more particularly to a wire tying tool (tying band) in which a locking state between a band portion and a lock portion is improved.

[0002]

2. Description of the Related Art In recent years, wire bundles such as those for vehicles, optical fiber bundles, air pipe bundles, and the like have been bundled together.
DESCRIPTION OF RELATED ART The binding band which locks and fixes to a desired mounting surface is widely used. In particular, in a wire harness mounted in a vehicle, a binding band is frequently used to fix a trunk line portion where a large amount of electric wires are bundled, and a branch line portion provided for each electric or electronic component.

Hereinafter, the structure of a conventional binding band will be described in detail with reference to the drawings. As shown in FIG. 4A, the structure of the binding band 10 with a clip includes a band-like band portion 1 for converging a wire, and a locking portion for locking and fixing the band portion 1 at a predetermined position and bundling the wire. 2 and a clip portion 3 for engaging the bound wire with a predetermined mounting opening. Here, the locking of the band portion 1 to the lock portion 2 is performed, for example, as shown in FIG.
The band portion 1 wound around the lock portion 2 is passed through a lock hole 2a formed in the lock portion 2 and a saw blade-shaped stopper 1a formed on the band portion 1 is locked by a locking claw provided in the lock hole 2a. Then, the wire bundle 11 is bound and held with an arbitrary tightening force.

The locking mechanism between the band portion 1 and the lock portion 2 in such a binding band 10 will be described in more detail with reference to FIG. 5A, the locking claw 2b is elastically protruded inside the lock hole 2a through which the band portion 1 penetrates, and the locking claw 2b is provided with a stopper 1a of the band portion 1 of the locking claw 2b. An inclined surface 2c, a protruding end 2d, and an upright surface 2e are formed in a contact portion (the lower side in the drawing) so as to engage with the saw blade shape of the stopper 1a. As shown in FIG. 5 (b), when the band portion 1 is inserted into the lock hole 2a of the lock portion 2 in the direction of arrow F and penetrates, the locking claw 2b slides on the inclined surface 1b of the saw blade-shaped stopper 1a. Deflection occurs when pressed. At this time, the inclined surface 2c and the protruding end 2d of the locking claw 2b repeat the sliding contact with the inclined surface 1b and the protruding end 1c of the stopper 1a, and the fastening claw 2b and The inclined surfaces 2c and 1b of the stopper 1a and the upright surfaces 2e and 1d abut and engage with each other to lock and fix the band portion 1a to which a return force in the direction opposite to the arrow F is applied.

[0005]

In the binding of the electric wire bundle by the conventional binding band as described above, the locking claw 2b is used.
The upright surface 2e of the stopper 1a and the upright surface 1d of the stopper 1a come into contact with a sufficient abutting area, so that a locking mechanism opposing the return force applied to the band portion 1 is provided. Therefore, there is a problem that when the contact area between the upright surfaces 2e and 1d decreases, the locking force decreases. At the time of the actual wire bundle binding work, as shown in FIG. 6A, the band portion 1 in which the wire bundle is bundled is inserted into the lock hole 2a and penetrated, and then the band portion 1 is quickly pulled in the arrow F direction. The bundle of wires is bound and fixed with a sufficient tightening force. According to such work,
Since the saw blade shape of the stopper 1a repeatedly makes impact contact with the locking claw 2b in a short period of time, impact and frictional heat are generated on the inclined surface 2c and the protruding end 2d of the locking claw 2b, and FIG. As shown in ()), in particular, the protruding end 2d and the inclined surface 2c in the vicinity thereof are worn, and the locking claw 2b and the stopper 1a are worn.
There is a problem that the contact area between the upright surfaces 2e and 1d of the band portion 1 is reduced, and the locking force to the band portion 1 is reduced. At this time, the saw blade shape of the stopper 1a has a protruding end 1 of the region B drawn out in contact with the locking claw 2b and an inclined surface in the vicinity thereof as compared with the region A not in contact with the locking claw 2b. 1b is slightly worn. For this reason, once the locking state between the locking claw 2b and the stopper 1a as shown in FIG. 6B is released (released), the locking force is weak on the region B side.
There is a problem that the binding of the wire bundle 11 by the band portion 10 becomes loose intermittently. The problem with such a locking mechanism is that, particularly in a wire harness mounted on a vehicle, the tightening force on the wire harness is reduced due to vibration or the like during running of the vehicle, causing a shift in the wiring fixing position, or a problem with the binding band 1.
This causes a drop from zero, which is a factor that leads to a decrease in quality.

[0006] An object of the present invention is to solve the above problems,
It is an object of the present invention to provide a wire tying member which can securely bind and fix a wire without deteriorating a locking force even when a wire tying member is inserted into a lock portion of a band portion and a quick retraction operation is performed at the time of penetration. is there.

[0007]

In order to achieve the above object, the invention according to claim 1 is directed to a band portion 1 having a saw blade shape in which peaks and valleys are sequentially arranged in a strip extending direction. the penetrating in the locking unit 2, in the wire holder for engaging locks tying the linear body fixed to a predetermined position of the band portion 1 by engaging claw 2b in the lock unit 2, the locking claw 2b Formed
Each of the inclined surface 2c, the valley portion and the upright surface 2e to the band
To the inclined surface 1b, the mountain portion and the upright surface 1d formed in the portion 1.
And a projection 2 formed on the locking claw 2b.
f engages with a concave portion 1e formed in a valley of the band portion 1.
The feature is that it is made to be.

With such a configuration, the locking claw 2b and the strike
The state of contact between the upright surfaces 2e and 1d of the upper
A locking claw is provided for the upright surface 1d and the concave portion 1e of the upper 1a.
Almost the entire area of the upright surface 2e of the projection 2b and the projection 2f are in contact with each other.
As a result, the locking force can be improved,
Securely locks the band 1 to which the return force is applied in the opposite direction.
Can be specified. Also, the band 1 is attached to the locking claw 2b.
The locking state when pulled in quickly is
The impact and frictional heat caused by the pull-in
f is worn upon receiving, the inclined surface 2c of the locking claw 2b and
Wear of the upright surface 2e is suppressed, and the inclined surface 2 of the locking claw 2b is reduced.
c, the valley and the upright surface 2e are each inclined surfaces of the stopper 1a.
1b, ridges and upright surface 1d. The above purpose
In order to achieve
A concave portion 1e of the band 1 is formed on the side of the band 1 in the width direction.
It is characterized by being. With such a configuration, the concave
When the convex portion 2f is engaged with the portion 1e, the band portion 2
Can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the wire binding device according to claim 1 or 2 will be described below in detail with reference to FIGS. FIG. 1 shows a band portion 1 of a binding band according to the present invention.
3 is a perspective view showing a main part of a stopper 1a and a locking claw 2b of a lock portion 2.

In FIG. 1 (a), a stopper 1a of a band portion 1 has a saw-toothed cross-sectional shape similar to the conventional one, and a band-like band portion 1 at a saw-tooth-shaped valley.
A concave portion 1e is formed on the side in the width direction. Further, as shown in FIG. 1B, the locking claw 2b of the lock portion 2 has a saw blade-shaped cross section corresponding to the shape of the stopper 1a as in the related art, and has a saw blade shaped crest. A protrusion 2f corresponding to the recess 1e of the stopper 1a is provided on the width direction side portion.

In such a configuration, the locking state of the band portion 1 and the locking claw 2b is shown in a sectional view in the extending direction in FIG. 2A, and the inclined surface 2c, the valley portion, and the upright of the locking claw 2b are shown. The surface 2e comes into contact with the inclined surface 1b, the peak portion, and the upright surface 1d of the stopper 1a, and the convex portion 2f of the locking claw 2b engages with the concave portion 1e provided at the valley portion of the stopper 1a.
At this time, the locking claw 2b and the upright surface 2e of the stopper 1a,
As shown in the cross-sectional views in the width direction (XX cross section and YY cross section) in FIGS. 2B and 2C, the contact state between the 1d and the upright surface 1d of the stopper 1a and the concave portion 1e. Since almost the entire area of the upright surface 2e of the locking claw 2b and the protruding portion 2f are in contact with each other, the locking force can be improved, and the band portion 1 to which the returning force is applied in the direction opposite to the drawing direction of the arrow F It is possible to securely lock and fix.

FIG. 3 (a) is a cross-sectional view in the extending direction when the band 1 is quickly pulled into the locking claw 2b.
The impact and frictional heat caused by the pull-in
f receives and wears, the abrasion of the inclined surface 2c and the upright surface 2e of the locking claw 2b is suppressed, and the inclined surface 2 of the locking claw 2b is reduced.
The c, the valley and the upright surface 2e respectively come into good contact with the inclined surface 1b, the crest and the upright surface 1d of the stopper 1a. The remaining wear of the projection 2f of the locking claw 2b is engaged with the recess 1e provided at the valley of the stopper 1a. At this time, the state of contact between the locking claw 2b and the upright surfaces 2e and 1d of the stopper 1a is determined with respect to the upright surface 1d of the stopper 1a as shown in the widthwise sectional view (ZZ section) in FIG. And the locking claw 2b
The entire area of the upright surface 2e of the locking claw 2b contacts
Since the wear residue of f contacts a part of the concave portion 1e, a sufficient locking force can be secured, and the band portion 1 to which the returning force is applied in the direction opposite to the drawing direction of the arrow F is securely locked and fixed. can do.

In the wire holder of the present invention, the upright surface of the locking claw is formed up to a position where the inclined surface is extended, similarly to the conventional saw blade shape, and the crest (projecting end) in the width direction. The convex portion may be further protruded from the side portion, and the concave portion may be formed in the valley portion in addition to the conventional saw blade shape in the cross-sectional shape on the stopper side. According to such a configuration, a sufficient locking force can be maintained only by the contact area of the upright surface regardless of the residual wear of the convex portion which is worn due to the quick retraction of the band portion, and the convex shape in the conventional shape can be maintained. Since it is only necessary to additionally configure the part and the concave part, the manufacturing cost of the mold can be reduced by reducing the man-hour for manufacturing the mold.

Further, in the above-described embodiment, the configuration in which the convex portions and the concave portions are provided on the side portions in the width direction has been described. However, it is needless to say that the convex portions and the concave portions may be provided at the center portions of the peak portions and the valley portions.

[0015]

As described above, according to the first aspect of the present invention,
Are the same as the locking claws 2b and the upright surfaces 2e and 1d of the stopper 1a.
The contact state of the stopper is determined by the upright surface 1d of the stopper 1a and the concave portion.
1e, substantially the entire area of the upright surface 2e of the locking claw 2b and
Since the projections 2f are in contact with each other, it is possible to improve the locking force.
And return force is applied in the direction opposite to the retracting direction.
The locking portion 1 can be securely locked and fixed. Also, van
When the door 1 is quickly pulled into the locking claw 2b.
The stop state is caused by the impact and frictional heat caused by the retraction of the band portion 1.
Is received by the projection 2f of the locking claw 2b and is worn.
The wear of the inclined surface 2c and the upright surface 2e of 2b is suppressed,
The inclined surface 2c, the valley, and the upright surface 2e of the stop claw 2b
Good for inclined surface 1b, crest and upright surface 1d of upper 1a
Abut Therefore, in a wire harness attached to a vehicle, a high-quality wire harness can be provided that prevents a tightening force on the wire harness from being reduced due to vibrations during traveling of the vehicle and the like, thereby preventing displacement of a wiring fixing position and falling off from a binding band. Can be realized. Further, according to claim 2
According to the invention, when the convex portion 2f is engaged with the concave portion 1e, the bump
The lateral displacement of the door portion 2 can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a wire holder according to claim 1 or 2 ;

FIG. 2 is a view showing a locked state of an embodiment of the wire holder according to claim 1 or 2 ;

FIG. 3 is a view showing a worn portion and a locked state of an embodiment of the wire holder according to the first or second aspect .

FIG. 4 is a diagram showing an example of a binding band according to the related art.

FIG. 5 is a view showing a locking mechanism of a binding band according to the related art.

FIG. 6 is a view showing a problem of a locking mechanism according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Band part 1a Stopper 1b Inclined surface 1c Protrusion end 1d Upright surface 1e Depression 2 Lock part 2a Lock hole 2b Locking claw

Claims (2)

(57) [Claims] 1. A band portion 1 having a strip in the stretching direction to the peaks and saw blade shape valleys are sequentially column set through the lock unit 2, the band by the engaging claw 2b in the lock unit 2 In a wire rod holder which locks a predetermined position of the portion 1 to bind and fix a linear body, an inclined surface 2c, a valley, and an upright formed on the locking claw 2b.
Each of the surfaces 2e is an inclined surface 1 formed on the band portion 1.
b, the abutment and the upright surface 1d.
The convex portion 2f formed on the pawl 2b is connected to the valley of the band portion 1.
A wire tying tool characterized in that the wire tying tool is engaged with a concave portion 1e formed in the wire rod. (2) The concave portion 1e of the band portion 1 is
2. The device according to claim 1, wherein the first portion is formed on a side portion in the width direction.
A wire binding device as described.