JP2001275237A - Structure for attaching clamp and clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a structure for attaching a flat plate clamp. SOLUTION: A flat plate clamp 11 formed with a vehicle body latch 13 in a protruding manner in the center of a flat plate 12 constituted of a rectangular flat plate and protruding parts 15 on both sides of the flat plate 12 is placed on the outer periphery of a mesh tube 10 for inserting an electric wire W. Both sides of the flat plate and the mesh tube are covered with a heat shrinkable tube 21 of which the inner periphery is coated with hot melt adhesive 20, respectively. The hot melt adhesive melted by heating is penetrated into the meshes of the mesh tube, and the tube 21 is shrunk, so that it straddles the protrusions 15 on both ends of the flat plate and is fixed along the protruding part 15 of the flat plate and at the outer periphery of the mesh tube 10.

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, and more particularly, to a vehicle body locking clamp which is firmly fixed to a net tube provided outside a group of electric wires routed to an automobile.

[0002]

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

[0003]

In the case of the above-mentioned tape winding, there is a risk that the tape may be broken by an interfering object, the protection is not sufficient, and the appearance is not so good. Have been.

When a wire harness is routed between a vehicle body and a door or a roof of an open car that is movable with respect to the vehicle body, the wire harness expands and contracts when the door and the roof move. At that time, a tensile load is intensively applied to the clamp that locks the wire harness to the vehicle body. In such a case, since the wire harness and the clamp are only tape-fixed, there is a problem that the wire harness is easily detached from the clamp, for example, the tape is torn or the clamp slides. As described above, when the wire harness and the clamp are detached, the wire harness hangs down to the indoor side, and does not smoothly follow the opening / closing operation of the door or the roof.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to improve protection and appearance of a wire harness, and to prevent the wire harness from coming off a clamp even when the wire harness is expanded and contracted. And

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, first, according to the present invention, firstly, a vehicle body engaging portion is protrudingly provided at the center of a substrate 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 mesh tube through which electric wires are inserted, and a hot-melt adhesive is applied to the inner circumferential surface on both sides of the board portion and the mesh tube. The coated heat-shrinkable tube is covered, and the hot-melt adhesive melted by heating penetrates into 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 mesh. The present invention provides a clamp mounting structure which is also fixed to the outer peripheral surface of the tube.

As described above, when a convex portion is provided on a portion of the substrate portion of the clamp around which the heat-shrinkable tube is wound, and the heat-shrinkable tube is fixed along the convex portion, the heat-shrinkable tube is laterally shifted by being hooked on the convex portion. Can be prevented.

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

Further, according to the present invention, secondly, a vehicle body engaging portion is protruded from a central portion of a substrate portion formed of a rectangular flat plate;
A board-type clamp provided with outer protrusions at both ends of the board portion and provided with an inner protrusion at a predetermined distance from the outer protrusions is mounted on the outer peripheral surface of a mesh tube through which an electric wire is inserted. A heat-shrinkable tube in which a hot-melt adhesive is applied to the inner surface of both sides and a mesh tube is covered between the outer projection and the inner projection, and the hot-melt adhesive that is melted by heating is applied to the mesh of the mesh tube. Penetrated and
A clamp mounting structure is provided in which the heat-shrinkable tube is shrunk and fixed to the outer peripheral surfaces of the substrate and the net tube.

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

The above-mentioned mesh tube is formed by knitting an insulating resin yarn such as nylon, polyester, PET or the like into a cylindrical shape, and has no elongation. However, when it is shrunk, it has a structure capable of increasing the diameter and expanding the mesh. Things.

When a group of electric wires constituting the wire harness is passed through the net tube, the protection function is higher than that of the tape winding, and the appearance of the wire harness exposed to the indoor side can be improved. In addition, 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 a substrate-type clamp is attached to the outer peripheral surface of the mesh tube in the same manner as in the prior art,
Since the mesh tube has low frictional resistance, it is slippery, and the problem of tearing off the tape as in the case of the tape winding described above is not solved. Therefore, in the present invention, the heat-shrinkable tube with hot melt is put on the substrate portion and the net tube of the substrate type clamp, and the hot melt adhesive is penetrated into the mesh of the net tube, and the tube is shrunk to the substrate and the net tube by shrinking. The clamp is fixed to the mesh tube by being fixed.

[0014] The hot-melt adhesive made of polyamide has a strong adhesive force to the net tube, but the adhesive force to the substrate of the clamp formed of polypropylene or the like is not so strong. The convex portion is provided as described above, and the heat-shrinkable tube is fixed to the convex portion without displacement by being hooked on the convex portion.

As described above, the hot melt type adhesive is penetrated into the mesh to fix the substrate portion and the mesh tube via the adhesive, and the tube is thermally contracted to firmly adhere to the substrate portion and the outer peripheral surface of the mesh tube. When they are brought into close contact with each other, even if a tensile stress acts on the mesh tube through which the electric wire has been inserted, the mesh tube can be reliably prevented from coming off the clamp.

In order to attach the clamp to the wire harness, the both sides of the base of the clamp and the wire harness are tape-wound, not only when both sides of the clamp and the net tube are covered and fixed with a hot-melt type heat shrink tube. In the case of fixing, or in the case of fixing by attaching a heat-shrinkable tube, the outer projections are provided at both ends of the substrate portion, and the inner projections are provided at a predetermined distance from the outer projections. Preferably, a tape or a tube for fixing the clamp and the wire harness is attached between the clamp and the wire harness.

[0017]

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 of the open car and the body, and a pair of clamps 11 are fixed to a net tube 10 or the like that covers the wire harness, and the roof and the body are connected. The locking portions 13 of the clamp 11 are inserted and locked respectively.

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

The substrate type clamp 11 is formed of polypropylene, and has a vehicle body locking portion 13 protruding from a central portion of a substrate portion 12 made of a rectangular flat plate as shown in FIG. On the front surface side 12a of the substrate portion 12, a convex portion 15 is provided in a winding region 14 such as a tube on both sides in the longitudinal direction. The convex portion 15 is formed by continuously forming two mountain portions 16a in the length direction over the entire length of the substrate portion 12 in the width direction. The vehicle body locking portion 13 has a shape in which a locking blade 13a is bent and protruded from a tip of a shaft portion 13b protruding from the base plate portion 12, and is inserted into mounting holes formed in the roof and the body, respectively. The configuration is such that the blade 13a is locked.

The mesh tube 10 is made of a strong insulating resin yarn braided into a small-diameter cylindrical shape with a round mesh, and has no elongation. However, when it is shrunk, it becomes larger in diameter and can expand the mesh. It is.

Next, a 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 mesh tube 10 is stabilized by passing an iron pipe through the mesh tube 10 before the wire group W is inserted, and the board portion 12 of the board type clamp 11 is attached to the outer peripheral surface of the mesh tube 10.
Is placed, and a heat-shrinkable tube 21 having a hot-melt type adhesive 20 applied to the inner peripheral surface thereof is put on the convex portion 15 on both sides of the substrate portion 12 and the net tube 10. As the heat-shrinkable tube 21 in which the hot-melt adhesive 20 made of these polyamides is applied to the inner peripheral surface, for example, Sumitube (manufactured by Sumitomo Electric Industries, Ltd.) is suitably used. The thickness of the heat-shrinkable tube 21 is about five times the thickness of a PVC tape conventionally used for fixing a substrate portion, and is much larger in strength than the tape. 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 shrink tubes 21A and 21B are attached to both sides of the substrate portion 12 and then heated at 110 ° C., as shown in FIGS. In addition to penetrating into the mesh of No. 10, the recess 16b between the two peaks 16a is also filled, and the heat-shrinkable tube 21 contracts and is fixed along the surfaces of the peaks 16a and the recess 16b, and the net tube 1
0 also adheres to the outer peripheral surface. Finally, the iron pipe is pulled out from the net tube 10, and the wire group W is inserted therethrough.

As described above, by fixing the substrate type clamp 11 having the convex portion 15 on the surface thereof to the mesh tube 10 via the hot melt type adhesive 20, the heat shrinkable tube 2 is formed.
In addition to the heat-shrinkage, the substrate-type clamp 11 is brought into close contact with the mesh tube 10, the heat-shrinkable tube 21 is brought into close contact with the surface of the projection 15 of the substrate-type clamp 11, and the hot-melt adhesive 20 is Net tube 10 and recess 16b
The heat-shrinkable tube 21 and the mesh tube 1
In addition to the fixing force of 0, 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 the mesh tube. In particular, even if tensile stress is intensively applied to the mounting position of the substrate-type clamp, the heat-shrinkable tube 21 is caught on the convex portion 15. Can be prevented.

As described above, the wire harness can reliably follow the opening / closing operation of the roof, and even if the wire harness is exposed to the outside at the time of the opening / closing operation, the wire group is covered with the net tube 10. The appearance can be improved, and the protection function can be enhanced.

FIGS. 6 to 8 show modified examples of the first embodiment. In the first modified example shown in FIG. 6, the convex portion 15 is formed by continuously forming a large number of small peak portions 16a '. In this case, a large number of concave portions 16b 'are also formed, the concave portions 16b' are filled with the hot-melt type adhesive 20, and the heat-shrinkable tube 21 is hooked on the convex portions 15 composed of a large number of peak portions 16a '. Lateral displacement can be prevented.

In the second modified example shown in FIG. 7, the convex portion 15 is formed in a spherical shape, and in this case also, the heat-shrinkable tube 21 is shrunk along the surface of the spherical portion 17a and the outer periphery of the mesh tube 10 to be fixed. 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 12, so that the heat-shrinkable tube 21 and the substrate-type clamp 11 The fixing force is increased, and the heat-shrinkable tube 21 can be prevented from being displaced by the heat-shrinkable tube 21 being caught on the spherical portion 17a even in the pulling in the direction of the arrow A.

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

FIGS. 9 to 11 show a substrate type clamp 11 'according to the second embodiment. The substrate type clamp 11 '
The outer projections 31 are provided on both sides in the longitudinal direction of the surface 12a of the substrate portion 12, and the inner projections 32 are provided at a predetermined distance from the outer projections 31. The outer projections 31 and the inner projections 32 form a tube. The configuration is such that the equally-wound region 14 is interposed therebetween, and the other points are the same as those in the first embodiment. The predetermined dimension is a width dimension of a fixing member such as a heat-shrinkable tube or a tape for fixing the clamp and the wire harness.

As shown in FIG. 10, when the substrate-type clamp 11 'is attached to the mesh tube 10 by a heat-shrinkable tube 21 coated with a hot-melt-type adhesive 20 on its inner peripheral surface, the molten hot-melt-type adhesive Agent 20 is net tube 1
0, and the heat-shrinkable tube 21 thermally shrinks and adheres tightly to the surface of the substrate portion 12 and the outer peripheral surface of the mesh tube 10.
In addition to 1 ′, the fixing force between the substrate-type clamp 11 ′ and the heat-shrinkable tube 21 is enhanced. Furthermore, since the fixed heat-shrinkable tube 21 is caught between the outer projection 31 and the inner projection 32 and caught, the displacement of the clamp in the direction of the arrow A can be reliably prevented.

On the other hand, as shown in FIG. 11, the substrate type clamp 11 ′ is not
In a case where the tape 23 is wound around the wire group W covered with the tape 23 in the same manner as before, the tape 23 is
Since it is caught and caught between the inner projection 1 and the inner projection 32, the displacement of the clamp in the direction of arrow A can be prevented.

The present invention is not limited to the above-described embodiment. 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, a convex portion is formed at the winding position of a tube or the like on both sides of the surface of the substrate type clamp, and the heat-shrinkable tube is put on the convex portion. As a result, the heat-shrinkable tube is fixed along the surface of the convex portion, and the molten hot-melt type adhesive penetrates into the recessed portion between the convex portions and the mesh of the net tube, so that the substrate-type clamp and the heat-sensitive adhesive can be heated. The adhesive force between the shrink tube and the outer tube, such as a net tube or tape, and the substrate-type clamp are increased. In particular, even when tensile stress is concentrated between the clamp and the wire harness during the opening and closing operation of the roof, the heat-shrinkable tube is caught on the convex portion, so that lateral displacement and the like can be reliably prevented.

Alternatively, by providing outer projections and inner projections on both sides of the substrate portion of the substrate type clamp, that is, by providing projections on both sides of the region where the tube or the like is wound, the fixing material such as a heat-shrinkable tube or tape can be used. The clamp and the inner projection are immovably caught and caught, so that lateral displacement of the clamp and the like can be prevented.

When a net tube is used as a sheathing material of the wire harness, the function of protecting the electric wire can be enhanced, and the appearance can be improved as compared with a conventional tape winding or the like.

[Brief description of the 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. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 3;

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

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

FIG. 8 is an enlarged sectional view of a main 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.

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 shrinkable tube.

FIG. 11 is a perspective view showing a state in which the substrate-type clamp shown in FIG. 9 is attached to a wire harness that has been subjected to tape winding processing with a tape.

FIG. 12 is a drawing showing a conventional example.

[Explanation of symbols]

 W Electric wire group 10 Net tube 11, 11 'Board type clamp 12 Substrate part 14 Tube or the like winding area 15 Convex part 16a, 16a' Mountain part 16b, 16b 'Concave part 17a Spherical part 17b Depressed part 18 Square protrusion 20 Hot melt type Adhesive 21 Heat shrink tube 23 Tape 31 Outer protrusion 32 Inner protrusion

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4E352 AA02 AA03 AA09 BB15 CC04 CC17 CC18 CC20 CC23 CC56 DD05 DR02 DR18 DR19 DR26 DR27 EE05 FF06 GG12 GG20 GG23 5G363 AA04 AA16 BA02 DA20 DC02

Claims (4)

[Claims] 1. A net through which an electric wire is inserted by a board type clamp having a vehicle body engaging portion projecting from a central portion of a board portion made of a rectangular flat plate and having projections provided on both sides of the board portion. A heat-shrinkable tube is placed on the outer peripheral surface of the tube, and a heat-shrinkable tube coated with a hot-melt adhesive on the inner peripheral surface is covered on both sides of the substrate portion and the net tube, and the hot-melt adhesive melted by heating is applied to the net tube. And the heat-shrinkable tube is shrunk and fixed along the convex portion of the substrate portion, and is also fixed to the outer peripheral surface of the mesh tube. 2. A convex portion provided on both sides of a substrate portion of the substrate type clamp has a shape in which a mountain portion is continuous or a spherical portion protrudes, and a heat-shrinkable tube is fixed along these convex portions and the convex portion is formed. The clamp mounting structure according to claim 1, wherein a hot melt adhesive is filled in a recess formed between the portions or a recess formed between the projection and the substrate. 3. A vehicle body engaging portion protruding from a central portion of a substrate portion formed of a rectangular flat plate, and outer projections are provided at both ends of the substrate portion, and are spaced apart from the outer projections by a predetermined dimension. A substrate-type clamp provided with an inner projection is placed on the outer peripheral surface of a net tube through which an electric wire is inserted, and a heat-shrinkable tube in which a hot-melt adhesive is applied to the inner peripheral surface of both sides of the substrate portion and the net tube is provided. The hot-melt adhesive that is covered between the outer protrusion and the inner protrusion and melted by heating penetrates into the mesh of the mesh tube, and the heat-shrinkable tube is shrunk so that the substrate portion and the outer peripheral surface of the mesh tube are also reduced. Mounting structure of the fixed clamp. 4. A vehicle body engaging portion protruding from a central portion of a substrate portion formed of a rectangular flat plate, and outer protrusions are provided at both ends of the substrate portion, and are spaced apart from the outer protrusions by a predetermined dimension. Provide inner protrusions, between these outer protrusions and inner protrusions,
A board-type clamp with a tape or tube that secures the clamp and wire harness.