JP3501087B2 - Clamp mounting structure and clamp - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp mounting structure and a clamp. More specifically, the present invention relates to a clamp for fixing a vehicle body firmly to a mesh tube which is installed on a wire group installed in an automobile.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 12, a tape T1 is often wound around the outer peripheral surface of an electric wire group W as an exterior material for concentrating and protecting a plurality of wire harnesses (electric wire group). Wire harness W /
When H is attached to the vehicle body, the clamp C is used, and both sides of the substrate of the clamp C are wound and fixed with the tape T2.

[0003]

In the case of the above-mentioned tape winding, there is a risk of being pierced by an interfering object, protection is not sufficient, and the appearance is not so good. Especially, when it is seen from the inside of the room, improvement in appearance is required. Has been.

Further, when the wire harness is routed between the vehicle body and the door or roof of the open car that is movable with respect to the vehicle body, the wire harness is expanded and contracted when the door and the roof are moved. At that time, a tensile load is intensively applied to the clamps that lock the wire harness to the vehicle body. In such a case, since the wire harness and the clamp are only taped, there is a problem that the wire harness is easily detached from the clamp, such as the tape being torn off or the clamp sliding sideways. In this way, when the wire harness and the clamp are disengaged, the wire harness hangs down toward the inside of the room and cannot smoothly follow the opening / closing operation of the door or roof.

The present invention has been made in view of the above problems, and it is an object of the present invention to improve the protection and appearance of a wire harness and prevent the wire harness from coming off the clamp even when the wire harness is expanded and contracted. I am trying.

[0006]

In order to solve the above-mentioned problems, according to the present invention, firstly, a vehicle body engaging portion is provided so as to project from the central portion of a base plate portion formed of a rectangular flat plate. A board type clamp having convex portions on both sides of the board portion is placed on the outer peripheral surface of a net tube through which an electric wire is inserted, and hot melt adhesive is applied to the inner peripheral surface on both sides of the board portion and the net tube. The applied heat-shrinkable tube is covered, and the hot-melt adhesive that is melted by heating is penetrated into the mesh of the mesh tube, and the heat-shrinkable tube is shrunk and fixed along the convex portion of the substrate part and the mesh. Provided is a clamp mounting structure that is also fixed to the outer peripheral surface of the tube.

As described above, when a convex portion is provided on the portion of the clamp base plate around which the heat-shrinkable tube is wound and the heat-shrinkable tube is fixed along the convex portion, the heat-shrinkable tube catches on the convex portion and is laterally displaced. Can be prevented.

The convex portions provided on both sides of the substrate portion of the substrate type clamp have a shape in which peaks are continuous or a shape in which spherical portions are projected, and the heat-shrinkable tube is fixed along these convex portions and the convex portions are formed. It is preferable that a hot-melt adhesive is filled in the recesses or the recesses formed between the recesses and the substrate. As described above, the hot melt adhesive is accumulated in the depressions between the convex portions or the depressions between the convex portions and the substrate portion, whereby the adhesive force between the heat shrinkable tube and the substrate portion can be further increased.

Secondly, according to the present invention, a vehicle body engaging portion is provided so as to protrude from the central portion of a substrate portion made of a rectangular flat plate, and
A board type clamp having outer projections provided on both ends of the board section and having inner projections spaced apart from the outer projection by a predetermined dimension is placed on an outer peripheral surface of a mesh tube through which an electric wire is inserted, The heat-shrinkable tube in which the hot melt adhesive is applied to the inner peripheral surface of both sides and the mesh tube is covered between the outer protrusion and the inner protrusion, and the hot melt adhesive that is melted by heating is meshed on the mesh of the mesh tube. Penetrated and
Provided is a clamp mounting structure in which a heat-shrinkable tube is shrunk so that the heat-shrinkable tube is also fixed to the outer peripheral surfaces of the substrate and the mesh tube.

As described above, when the heat-shrinkable tube is sandwiched between the outer projection and the inner projection, displacement of the heat-shrinkable tube can be prevented.

The mesh tube is made by knitting an insulating resin thread such as nylon, polyester, PET or the like into a cylindrical shape and has no elongation, but when it is contracted, the mesh tube becomes large in diameter and can expand the mesh. It is a thing.

When the wire group forming the wire harness is passed through the mesh tube, the protective function is higher than that of the tape winding, and the appearance of the wire harness exposed to the indoor side can be improved. Moreover, the work of inserting the electric wire group can be easily performed because the diameter of the wire tube is increased by shrinking the mesh tube.

However, when the substrate type clamp is attached to the outer peripheral surface of this mesh tube by the same method as the conventional one,
Since the mesh tube has a low frictional resistance, it is slippery, and the problem of tearing the tape is not solved as in the case of the tape winding described above. Therefore, in the present invention, the heat-shrinkable tube with hot melt is covered on the substrate portion and the mesh tube of the substrate type clamp to allow the hot melt adhesive to penetrate the mesh of the mesh tube and shrink the tube to the substrate and the mesh tube. It is fixed and the clamp is fixed to the mesh tube.

Further, the hot melt type adhesive made of polyamide has a strong fixing force with the net tube, but the fixing force with the base plate portion of the clamp formed of polypropylene or the like is not so strong, so that the base plate portion of the clamp is As described above, the convex portion is provided, and the heat shrinkable tube is fixed to the convex portion without being displaced by being caught on the convex portion.

As described above, the hot melt adhesive is permeated into the mesh to fix the substrate portion and the mesh tube through the adhesive, and the tube is thermally shrunk to firmly bond the substrate portion and the mesh tube outer peripheral surface. When they are brought into close contact with each other, it is possible to reliably prevent the mesh tube from coming off from the clamp even if tensile stress acts on the mesh tube through which the electric wire is inserted.

In order to attach the clamp to the wire harness, both sides of the clamp and the wire tube are wrapped with tape in order to attach the clamp to the wire harness, not only when both sides of the clamp and the net tube are fixed by being covered with a hot-melt type heat-shrinkable tube. Also when fixing or fixing by attaching a heat-shrinkable tube, outer projections are provided at both ends of the substrate part, and inner projections are provided with a predetermined dimension from the outer projections. It is preferable that a tape or a tube for fixing the clamp and the wire harness be attached between the clamp and the wire.

[0017]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In any of the embodiments, the wire harness is routed between the roof and the body of the open car, and the pair of clamps 11 is fixed to the mesh tube 10 or the like that covers the wire harness to fix the roof and the body. The locking portions 13 of the clamp 11 are inserted and locked.

1 to 5 show a clamp mounting structure according to the first embodiment, in which a plurality of electric wire groups W constituting a wire harness are inserted into a net tube 10 and a board type clamp is mounted on the net tube 10. 11 board portion 12 is mounted,
Both sides of the substrate portion 12 and the net tube 10 are covered and fixed with a hot-melt type heat-shrinkable tube 21.

The substrate type clamp 11 is formed of polypropylene, and as shown in FIG. 2, a vehicle body engaging portion 13 is provided at the center of a substrate portion 12 made of a rectangular flat plate, and On the front surface side 12a of the substrate portion 12, convex portions 15 are provided in the winding regions 14 such as tubes on both sides in the length direction. The protrusion 15 is formed by continuously forming two peaks 16a in the length direction over the entire length of the substrate 12 in the width direction. The vehicle body locking portion 13 has a shape in which a locking blade 13a is folded back and protruded from the tip of a shaft portion 13b protruding from the base plate portion 12, and is inserted into the mounting holes formed in the roof and the body, respectively. The blade 13a is configured to be locked.

The mesh tube 10 is made of a strong insulating resin yarn braided into a small diameter cylindrical shape by a round mesh and has no elongation, but it can be expanded to a larger diameter by shrinking and expand the mesh. Is.

Next, the process of attaching the substrate type clamp 11 to the mesh tube 10 will be described with reference to FIG. First, the shape of the net tube 10 is stabilized by passing an iron pipe through the net tube 10 before inserting the wire group W, and the board portion 12 of the board type clamp 11 is provided on the outer peripheral surface of the net tube 10.
Is placed, and the heat-shrinkable tube 21 having the inner peripheral surface coated with the hot-melt adhesive 20 is covered on the convex portions 15 on both sides of the substrate portion 12 and the net tube 10. As the heat-shrinkable tube 21 having the inner surface coated with the hot-melt adhesive 20 made of these polyamides, for example, Sumitube (manufactured by Sumitomo Electric Industries, Ltd.) is preferably used. The thickness of the heat-shrinkable tube 21 is about 5 times the thickness of the vinyl chloride tape conventionally used for fixing the substrate portion, and is also much larger than the tape in terms of strength. Each of the pair of heat-shrinkable tubes 21A and 21B attached to both sides of the substrate is short and has a length L of about 20 mm.

Next, after the heat-shrinkable tubes 21A and 21B are attached to both sides of the substrate portion 12 and heated at 110 degrees, as shown in FIGS. Not only the mesh tube 10 penetrates, but also the recess 16b between the two crests 16a is filled, and the heat-shrinkable tube 21 contracts and is fixed along the surfaces of the crest 16a and the recess 16b and the mesh tube. 1
It also adheres to the outer peripheral surface of 0. Finally, the iron pipe is pulled out from the mesh tube 10, and the wire group W is inserted there.

In this way, by fixing the substrate type clamp 11 having the convex portion 15 on the surface to the net tube 10 via the hot melt adhesive 20, the heat shrinkable tube 2
1 heat-shrinks to bring the substrate type clamp 11 into close contact with the net tube 10, the heat-shrinkable tube 21 also comes into close contact along the surface of the convex portion 15 of the substrate type clamp 11, and the hot melt adhesive 20 Net tube 10 and recess 16b
The heat-shrinkable tube 21 and the mesh tube 1 are filled in
Not only the fixing force of 0 but also the fixing force between the heat shrinkable tube 21 and the substrate type clamp 11 increases. Therefore, it is possible to prevent the clamp from coming off from the mesh tube, and in particular, even if tensile stress is intensively applied to the board-type clamp attachment location, the heat shrinkable tube 21 is caught by the convex portion 15, so that the clamp indicated by the arrow A is shown. It is possible to prevent lateral displacement of the sheet.

In this way, the wire harness can be surely made to follow the opening / closing operation of the roof, and even if the wire harness is exposed to the outside during the opening / closing operation, the wire group is covered with the mesh tube 10. , The appearance can be improved and the protection function can be enhanced.

6 to 8 each show a modification of the first embodiment. In the first modified example shown in FIG. 6, the convex portion 15 is formed by connecting a large number of small ridges 16a ′. In this case, a large number of recesses 16b 'are also formed, the recesses 16b' are filled with the hot-melt adhesive 20, and the heat-shrinkable tubes 21 are caught by the projections 15 composed of a large number of ridges 16a '. It is possible to prevent the lateral displacement of.

In the second modification shown in FIG. 7, the convex portion 15 is formed in a spherical shape, and in this case as well, the heat-shrinkable tube 21 is contracted and fixed along the surface of the spherical portion 17a and the outer circumference of the mesh tube 10. At the same time, the molten hot melt adhesive 20 is filled in the recess 17b formed between the spherical portion 17a and the surface 12a of the substrate portion 12, so that the heat shrinkable tube 21 and the substrate type clamp 11 are separated from each other. The fixing force is increased, and even when pulled in the direction of the arrow A, the heat shrinkable tube 21 is caught by the spherical portion 17a and the positional deviation can be prevented.

In the third modification shown in FIG. 8, the convex portion 15 is formed in a quadrangular cross section, and the surface of the square-shaped protruding portion 18 is covered with a heat-shrinkable tube 21 and fixed by heat shrinkage.

9 to 11 show a substrate type clamp 11 'in the second embodiment. The substrate type clamp 11 '
Is provided with outer protrusions 31 on both sides of the surface 12a of the substrate portion 12 in the length direction, and inner protrusions 32 are provided with a predetermined dimension from the outer protrusions 31, and the outer protrusions 31 and the inner protrusions 32 form a tube. The configuration is such that the equal winding region 14 is sandwiched, and other points are the same as those in the first embodiment, so the same reference numerals are given and description thereof is omitted. The predetermined dimension is the width dimension of a fixing material such as a heat-shrinkable tube or tape that fixes the clamp and the wire harness.

As shown in FIG. 10, when the substrate type clamp 11 'is attached to the net tube 10 with the heat shrinkable tube 21 having the hot melt adhesive 20 applied to the inner peripheral surface thereof, the melted hot melt adhesive is applied. Agent 20 is mesh tube 1
No. 0 mesh and the heat-shrinkable tube 21 heat-shrinks and adheres to the surface of the base plate 12 and the outer peripheral surface of the net tube 10. Therefore, the net tube 10 and the board type clamp 1
Not only 1 ′ but also the fixing force between the substrate type clamp 11 ′ and the heat shrinkable tube 21 is strengthened. Further, since the fixed heat-shrinkable tube 21 is sandwiched between the outer protrusion 31 and the inner protrusion 32 and is caught, the positional deviation of the clamp in the arrow A direction can be reliably prevented.

On the other hand, as shown in FIG. 11, the substrate type clamp 11 ′ is wound with the tape winding 22 instead of the mesh tube 10.
Even when the tape is wrapped around the electric wire group W covered with the tape 23 as in the conventional case, the tape 23 is attached to the outer projection 3
Since it is sandwiched between 1 and the inner protrusion 32 and caught, it is possible to prevent positional displacement of the clamp in the arrow A direction.

The present invention is not limited to the above-mentioned embodiment, and when the diameter of the mesh tube is large, the clamp may be attached with the electric wire inserted first without using the iron pipe.

[0032]

As is apparent from the above description, according to the present invention, the convex portions are formed at the winding positions of the tubes on both sides of the substrate type clamp, and the heat shrinkable tubes are covered on the convex portions. As a result, the heat-shrinkable tube is fixed along the surface of the convex portion, and the melted hot-melt adhesive permeates into the depressions between the convex portions and the mesh of the mesh tube, so that the substrate-type clamp and the heat The adhesive force with the shrinkable tube is increased, and the adhesive force between the outer casing material such as the mesh tube and the tape and the substrate type clamp is strengthened. In particular, even if tensile stress is concentrated between the clamp and the wire harness during the opening / closing operation of the roof, the heat-shrinkable tube is caught by the convex portion, so that lateral displacement can be reliably prevented.

Alternatively, by providing the outer protrusion and the inner protrusion on both sides of the substrate portion of the substrate type clamp, that is, by providing the protrusions on both sides of the winding region of the tube, the fixing material such as the heat-shrinkable tube or the tape protrudes to the outer side. Since it is immovably sandwiched between the inner protrusion and the inner protrusion and is caught, lateral displacement of the clamp can be prevented.

Further, when the net tube is used as the exterior material of the wire harness, the function of protecting the electric wire can be enhanced and the appearance can be improved as compared with the conventional tape winding.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a first embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the substrate type clamp shown in FIG.

FIG. 3 is a perspective view of a main part of FIG.

4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is an enlarged sectional view of an essential part showing a first modified example of the first embodiment.

FIG. 7 is an enlarged sectional view of an essential part showing a second modified example of the first embodiment.

FIG. 8 is an enlarged sectional view of an essential part showing a third modification of the first embodiment.

FIG. 9 is a schematic perspective view of a substrate type clamp according to a second embodiment of the present invention.

FIG. 10 is a side view showing a state where the substrate type clamp shown in FIG. 9 is fixed to a mesh tube with a heat shrink tube.

FIG. 11 is a perspective view showing a reference embodiment.

FIG. 12 is a drawing showing a conventional example.

[Explanation of symbols]

W wire group 10 mesh tube 11, 11 'PCB clamp 12 Board part 14 Tube etc. winding area 15 convex 16a, 16a 'Yamabe 16b, 16b 'recess 17a spherical part 17b depression 18 Square protrusion 20 Hot melt adhesive 21 heat shrink tube 23 tapes 31 Outer protrusion 32 inner protrusion

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-7-336066 (JP, A) JP-A-4-58710 (JP, A) JP-A-8-47146 (JP, A) JP-A-10- 201057 (JP, A) JP-A-8-226421 (JP, A) Actual flat 1-147621 (JP, U) Actual flat 7-16530 (JP, U) Actual flat 3-45021 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02G 3/30 B60R 16/02 623 H05K 7/00

Claims (3)

(57) [Claims] 1. A net through which an electric wire is inserted by a board-type clamp in which a vehicle body engaging portion is provided in a central portion of a board portion formed of a rectangular flat plate and convex portions are provided on both sides of the board portion. The hot-melt adhesive placed on the outer peripheral surface of the tube and covered with a heat-shrinkable tube whose inner peripheral surface is coated with hot-melt adhesive on both sides of the substrate portion and the mesh tube are melted by heating. The clamp mounting structure is soaked in the mesh of the mesh tube, and the heat-shrinkable tube is shrunk to be fixed along the convex portion of the substrate portion and also fixed to the outer peripheral surface of the mesh tube. 2. The convex portions provided on both sides of the substrate portion of the substrate clamp have a shape in which peaks are continuous or a shape in which spherical portions are projected, and the heat-shrinkable tube is fixed along these convex portions and is convex. 2. The clamp mounting structure according to claim 1, wherein a hot-melt adhesive is filled in a recessed portion between the portions or a recessed portion formed between the convex portion and the substrate portion. 3. A vehicle body engaging portion is provided at a central portion of a base plate portion formed of a rectangular flat plate, and outer protrusions are provided at both ends of the base plate portion, and a predetermined size is formed between the outer protrusions. The board type clamp with the inner protrusion is placed on the outer peripheral surface of the net tube through which the electric wire is inserted, and the heat shrinkable tube in which the hot melt adhesive is applied to the inner peripheral surface on both sides of the board part and the net tube is used. The hot-melt adhesive, which is covered between the outer protrusion and the inner protrusion and is melted by heating, penetrates the mesh of the mesh tube, and the heat-shrinkable tube is shrunk to the outer peripheral surface of the substrate and mesh tube. Mounting structure for fixed clamps.