JP2004129445A - Clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an insertion force for inserting a clamp to a locking hole. <P>SOLUTION: The clamp 10 is configured such that: a shaft 31 is erected from a wire installing part formed of a band 20 or a board 21; a wing 32 is folded to both sides of the shaft 31 from the tip of the shaft; and the clamp is formed of a resin molded object having a vehicle-body locking step 32a at the tip of the wing 32 and locked to a vehicle body B by being attached to a wire group that constitutes a wiring harness. A plate 33 is protruded from the circumference of the base end of the shaft 31, notches 34a to 34d are formed at the plate 33 from its external periphery, and the plate 33 is expanded in a sucking disk shape by expansions of the notches 34a to 34d and contacts with the vehicle body B in a state that the wing 32 is inserted in and locked with the locking hole H of the vehicle body B. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a clamp that is attached to a wiring wire harness on an automobile and is inserted and locked in a locking hole formed in a vehicle body panel. This is to prevent rattling later.
[0002]
[Prior art]
Conventionally, two types of clamps have been used as the clamp: a band clamp having a band portion wound around a group of electric wires, and a substrate-type clamp having a substrate portion to be fixedly wound around a wire group with a tape. As shown in FIG. 5 (A), these conventional clamps 1 have a shaft portion 2 erected from the band portion or the substrate portion, and a blade portion 3 for locking the vehicle body is formed by folding back. A plate portion 4 is provided to project from the entire periphery of the base end of the shaft portion 2. As shown in FIG. 5B, when the blade portion 3 is inserted and locked in the locking hole 5 of the vehicle body, the plate portion 4 comes into pressure contact with the outer peripheral edge of the locking hole 5 like a suction cup. The rattling of the clamp 1 is suppressed.
[0003]
[Patent Document 1]
JP-A-8-334109
[Problems to be solved by the invention]
However, in the above-described conventional clamp 1, the outer edge 4a of the dish portion 4 is continuously curved over the entire circumference, and the flexibility in the insertion direction into the locking hole is low. Therefore, in order to press the plate portion 4 against the outer peripheral edge of the locking hole 5, it is necessary to forcibly press the plate portion 4 against the vehicle body as shown in FIG. 5B. For this reason, there is a problem that a high insertion force is required when inserting the wing portion 3 into the locking hole 5, and a burden is imposed on an operator.
[0005]
The present invention has been made in view of the above problems, and has as its object to provide a clamp that can be inserted and locked in a locking hole with a low insertion force.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a shaft that stands up from a wire attachment portion composed of a band that is wound around a wire group and fastened and fixed or a substrate that is taped and fixed to the wire group, and both sides from the tip of the shaft portion. A clamp formed of a resin molded product having a vehicle body locking step at the tip of the blade portion, attached to a group of electric wires constituting a wire harness and locked to a vehicle body,
A plate portion protrudes from the entire periphery of the base end of the shaft portion, a cutout is provided in the plate portion from the outer periphery, and the blade portion is inserted into a locking hole of the vehicle body, and the locking step portion is connected to an end of the locking hole. The plate portion is provided with a clamp having a configuration in which the notch is widened in a state where the notch is widened and is spread in a sucker shape so as to come into contact with the vehicle body in a state where the plate portion is locked to the vehicle body while being locked to the edge.
[0007]
As described above, the notch is provided on the outer periphery of the plate portion, so that the plate portion is easily bent in the insertion direction by opening and closing the notch. Therefore, when inserting the blade into the locking hole, the notch is opened by lightly pressing the plate against the vehicle body, the plate is pushed open, and the clamp is inserted deeply. There is no need to forcibly crush the plate portion and strongly press it, so that the burden on the operator can be reduced. In addition, after the insertion and locking of the blade, the notch that had been widened during the insertion operation attempts to close with the original restoring force, so that the blade is pulled outward inside the locking hole and the inner edge is removed. And the plate portion is pressed against the vehicle body outside the locking hole, thereby preventing rattling between the vehicle body and the clamp.
[0008]
The cutouts provided in the plate portion are provided at two opposing positions or at three to four positions at equal intervals. In this way, by providing a plurality of notches at opposing positions or at equal intervals, when pressing the plate portion against the vehicle body, the load on one notch is reduced, and the load on each notch is averaged. Therefore, the rupture of the notch can be prevented. Further, by providing a plurality of notches, the rate of change of the outer periphery of the plate portion is increased, and the insertion force of the clamp can be further reduced, and the pressing force of the plate portion against the vehicle body can be increased. On the other hand, providing notches at five or more locations is not preferred because it takes time and effort in the notch forming process and reduces production efficiency.
[0009]
The dish portion has an elliptical shape, and the cutouts are provided facing at least both sides on the long axis side where the blade portions on both sides are arranged. That is, when the plate portion is elliptical, the curvature is the highest, and the position where the most load is applied when pressed against the vehicle body is on both sides on the long axis side. The notch provided at this position is opened and closed by opening and closing the plate. The outer periphery of the dish can be changed most greatly, and the dish can be pushed deep and greatly. Therefore, when the dish portion is elliptical, it is preferable to provide cutouts at least on both sides on the long axis side because the insertion force is reduced most effectively.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 to 3A and 3B show a band-type clamp 10 according to a first embodiment of the present invention, and the clamp 10 is wound around a group of electric wires and fastened and fixed by a band portion 20 (electric wire attachment portion). And a vehicle body locking portion 30 protruding from the band portion 20 and integrally formed of resin.
[0011]
The vehicle body locking portion 30 is composed of a shaft portion 31 erected from the band portion 20, a blade portion 32 formed by folding the shaft portion left and right from a tip thereof, and an entire circumference of a base end portion of the shaft portion 31. It comprises a protruding elliptical dish portion 33.
At the tip of the blade part 32, a vehicle body locking step part 32a is provided. Further, a total of four notches 34a, 34b, 34c, 34d are formed on the outer periphery of the plate portion 33 at both sides on the long axis side and both sides on the short axis side at equal intervals.
[0012]
When the clamp 10 having the above configuration is inserted into the locking hole H of the vehicle body B, the blade 32 is inserted into the locking hole H while the plate portion 33 is pressed against the vehicle body B from the outside. At this time, as shown in FIGS. 2A and 2B, the inserted blade 32 is opened inside the locking hole H, and the locking step 32 a at the tip is engaged with the inner edge of the locking hole H. At the same time, the notch 34a, 34b, 34c, 34d of the plate portion 33 pressed against the vehicle body B is opened, and the plate portion 33 is spread in a sucker shape.
Next, when the worker releases his / her hand from the clamp 10, as shown in FIG. 2C, the open notches 34a, 34b, 34c, and 34d attempt to close with the original restoring force. The locking step 32 of the blade 32 is pressed against the inner edge of the locking hole H by being urged in the pulling direction, and the plate 33 is pressed against the vehicle body B.
[0013]
As described above, when the clamp 10 having the above-described configuration is used, the notches 34a to 34d are opened by pressing the plate portion 33 against the vehicle body B. It can be inserted into the locking hole H, and the burden on the operator can be reduced. In addition, the clamp 10 is pressed against the vehicle body B from both the inside and outside of the locking hole H by the original restoring force of the notches 34a to 34d so as to close, so that rattling between the clamp 10 and the vehicle body B can be prevented. it can.
Further, a total of four cutouts 34a to 34d including cutouts 34a and 34b at both sides on the long axis side having the highest curvature are formed on the outer periphery of the elliptical dish portion 33, and thus these cutouts 34a to 34d are formed. By opening 34d, the plate portion 33 is pushed deep and greatly, and the clamp 10 can be inserted deeply with a small insertion force.
[0014]
FIG. 3 shows a modification of the first embodiment, in which two notches 34a and 34b are provided in the dish portion 33 so as to be opposed only to both long-side positions. In this modification as well, since the cutouts 34a and 34b are formed at both positions on the long axis side with the highest curvature rate, the plate portion 33 can be pushed deep and large effectively, and the insertion force is reduced. be able to.
[0015]
FIG. 4 shows a board-type clamp 11 according to a second embodiment of the present invention. The clamp 11 is provided with a board portion 21 (wire attaching portion) for fixing a group of wires by tape and projecting from the center of the board portion. The vehicle body locking portion 30 'is formed integrally with resin.
[0016]
The plate portion 33 'of the vehicle body locking portion 30' has a perfect circular shape, and three notches 34a ', 34b', and 34c 'are formed on the outer periphery of the plate portion 33' at equal intervals. I have. Although this embodiment is different from the first embodiment in this respect, it is the same in other respects, so that the same reference numerals are given and the description is omitted.
[0017]
In the clamp 11 according to the present embodiment, similarly to the first embodiment, three notches 34a ', 34b', and 34c 'are opened by pressing the plate portion 33' against the vehicle body B, and the plate portion 33 'is opened. The clamp 11 can be inserted and locked in the locking hole H with a low insertion force because it is spread out like a suction cup. Further, since the three notches 34a ', 34b', 34c 'are formed at equal intervals on the outer periphery of the perfect circular dish portion 33', the forces applied to the notches at the time of insertion average, Damage due to concentration of the load on any of the notches 34a ', 34b', 34c 'can be prevented.
[0018]
The present invention is not limited to the above-described embodiment, and it goes without saying that two or four notches may be provided at opposing positions on the outer circumference of the perfect circular dish.
[0019]
【The invention's effect】
As is clear from the above description, according to the present invention, when inserting the blade portion of the clamp into the locking hole, the plate portion is pressed against the vehicle body outside the locking hole, thereby forming the clamp on the outer periphery of the plate portion. The notch is opened and the plate portion is pushed and spread like a suction cup, so that the clamp can be inserted deeply into the locking hole with a low insertion force, and the burden on the operator can be reduced.
[0020]
In addition, by forming two to four notches at opposing positions or at equal intervals, the plate portion can be pushed deeply and spread, the clamp can be inserted with a lighter force, and the force applied to each notch can be reduced. On average, breakage of the notch can be prevented. Further, when the dish portion is elliptical, the notch is formed at least on both sides on the long axis side so that the dish portion can be pushed and spread most effectively in a sucker shape.
FIG. 1 is a perspective view showing a clamp according to a first embodiment of the present invention.
FIGS. 2A, 2B, and 2C are front views showing a process of inserting and locking a clamp shown in FIG. 1 into a locking hole.
FIG. 3 is a perspective view showing a modification of the first embodiment.
FIG. 4 is a plan view showing a clamp according to a second embodiment of the present invention.
FIG. 5 is a diagram showing a main part of a conventional example.
[Explanation of symbols]
10 Band Type Clamp 11 Board Type Clamp 30, 30 'Body Locking Part 32, 32' Blade 33, 33 'Plate 34a-34d, 34a'-34c' Notch

Claims (3)

A shaft portion is erected from a wire attachment portion composed of a band that is wound around the wire group and tightened and fixed or a substrate that is tape-wrapped and fixed to the wire group, and the blade portion is folded on both sides from the tip of the shaft portion, and A clamp made of a resin molded article having a vehicle body locking step and attached to a group of wires constituting a wire harness and locked to a vehicle body,
A plate portion protrudes from the entire periphery of the base end of the shaft portion, a cutout is provided in the plate portion from the outer periphery, and the blade portion is inserted into a locking hole of the vehicle body, and the locking step portion is connected to an end of the locking hole. A clamp having a configuration in which the notch is widened and spread in a sucker shape so as to come into contact with the vehicle body in a state where the plate portion is locked to an edge and locked to the vehicle body. The clamp according to claim 1, wherein the notches provided in the dish portion are provided at two opposing positions or at three to four positions at equal intervals. 2. The clamp according to claim 1, wherein the plate has an elliptical shape, and the cutouts are provided on both sides on a long axis side where at least the blade portions on both sides are arranged. 3.

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