JPH0668243U - Grommet - Google Patents

Abstract

(57) [Summary] [Purpose] The grommet can be easily and securely fixed to the vehicle body hole, and the waterproof performance is improved. [Structure] Electric wire mounting member (11) made of elastic material such as rubber
In advance, a rigid resinous body outer surface side mounting member (12) is mounted in advance, and a cylindrical body hole insertion portion (12e) provided on the vehicle body outer surface side mounting member (12) is mounted on the vehicle body hole (3). A cylindrical connecting portion (13d) which is provided on a vehicle body inner surface side attachment member (13) made of a resin having the same rigidity, to the vehicle body hole insertion portion (12e). The electric wire mounting member (11) is screwed and connected, so that the vehicle body outer surface contact portion (11e) provided on the electric wire mounting member (11) is surely brought into close contact with the vehicle body outer surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grommet for an electric wire bundle, and more specifically, in a vehicle wire harness, the electric wire bundle that penetrates through a vehicle body hole is externally fitted and fixed to a vehicle body to prevent water from entering the vehicle body hole and protect the electric wire bundle. Is intended.

[0002]

[Prior art]

 Conventionally, this type of grommet for waterproofing and wire protection is integrally molded with rubber, but there is a problem that the deterioration of rubber deteriorates the waterproofing performance with time and if it is easily attached to the vehicle body, it easily comes off. On the other hand, there is a problem in that it is very difficult to mount on the vehicle body in order to prevent it from coming off the vehicle body.

As a solution to the above problem, Japanese Utility Model Laid-Open No. 59-25115 proposes a two-body type grommet including an elastic portion made of rubber and a rigid portion made of resin.

The above-mentioned two-body type grommet has a structure shown in FIG. 6, and the elastic portion 1 has a cylindrical fixing portion 1a fitted on the wire bundle W, a flange portion 1b extending from one end of the fixing portion 1a, The waterproof lip portion 1c is provided at the tip of the flange portion 1b and is pressed against the outer surface of the vehicle body. On the other hand, the rigid portion 2 has a cylindrical portion 2a having an inner diameter larger than that of the wire bundle W, a lip retainer portion 2b extending from one end of the cylindrical portion 2a, and an extending portion from the other end of the cylindrical portion 2a to be pressed against the inner surface of the vehicle body. The contact part 2c is provided.

[0005]

[Problems to be solved by the device]

 Since the above-mentioned two-body type grommet is attached to the vehicle body hole 3 of the vehicle body 4 in a state where the rigid portion 2 is assembled to the elastic portion 1, the abutting portion 2c of the rigid portion 2 is flexed inwardly and the vehicle body hole 3 is forced. It is pushed and passed, and after passing, the contact portion 2c is returned to the original state and pressed against the inner surface of the vehicle body. At this time, since the contact portion 2c is made of a rigid material, it does not easily bend, requires a very strong force, and has a drawback of poor workability. Further, as described above, when the abutting portion 2c is forcibly inserted, there is a possibility that damage may occur such as breakage of the protruding tip portion, and in that case, the rigid portion 2 may come off from the vehicle body. .

Further, on the outer surface of the vehicle body, the waterproof lip portion 1c of the elastic portion 1 is held by the lip holding portion 2b of the rigid member 2. However, when the elastic member made of rubber deteriorates with time, the waterproof lip portion 1c A gap is formed between the vehicle body 4 and the vehicle body 4, and water is likely to infiltrate through the gap. Further, if the pressure contact force by the waterproof lip portion 1c decreases, there is a risk that the grommet may come off from the vehicle body, and there is a problem in that the reliability of waterproofing is low.

When the elastic portion 1 and the rigid portion 2 are integrally assembled, it is necessary to insert the lip pressing portion 2b of the rigid portion 2 between the flange portion 1b of the elastic portion 1 and the waterproof lip portion 1c. . At that time, since the waterproof lip portion 1c has a large thickness in order to increase its strength, the waterproof lip portion 1c is not easily deformed. Therefore, there is a drawback that the lip pressing portion 2b of the rigid portion 2 cannot be easily inserted. is there.

The present invention has been made in view of the above problems, and makes it possible to securely fix the grommet to the vehicle body, facilitate the fixing work, and ensure the vehicle body side seal to ensure waterproof performance. The purpose is to improve.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises an electric wire mounting member made of an elastic material such as rubber, a vehicle body outer surface side mounting member and a vehicle body inner surface side mounting member made of a rigid material such as resin. , A tube-shaped wire fixing portion that is fitted onto the wire bundle, a rigid material mounting portion that is provided at one end of the wire fixing portion so as to project radially outward, and a rigid material mounting portion is provided on the tip end surface of the rigid material mounting portion. On the other hand, the body outer surface side mounting member has a large-diameter mounting portion that fits inside the rigid member mounting portion and a small-diameter body hole insertion portion that penetrates the body hole. It has a cylindrical shape and is provided with a screw on the inner peripheral surface or the outer peripheral surface of the small diameter portion, and the vehicle body inner surface side mounting member is provided with a screw to be screwed into the vehicle body hole insertion portion. A cylindrical connecting part is provided, and a vehicle body inner surface abutting part is provided on one end surface of the connecting part. The vehicle body outer surface side mounting member is fixed to the electric wire mounting member in advance, the vehicle body hole insertion portion is penetrated from the outside to the vehicle body hole, and the vehicle body inner surface side mounting member is connected to the vehicle body hole insertion portion from the inside of the vehicle body. (EN) Provided is a grommet in which parts are connected by screwing so that the outer surface of the vehicle body and the inner surface of the vehicle body are in pressure contact with the outer surface and the inner surface of the vehicle body, respectively.

Specifically, the electric wire fixing member is provided with a large-diameter cylindrical rigid material mounting portion that projects radially outward from the tip of the tubular electric wire fixing portion, and the rigid material mounting portion has a distal end. The small-diameter cylindrical portion is continuous with the small-diameter cylindrical portion so that a lip-shaped vehicle body outer surface abutting portion projects from the outer peripheral surface of the small-diameter cylindrical portion. A mounting portion composed of a large-diameter cylindrical portion and a vehicle body hole insertion portion composed of a small-diameter cylindrical portion continuous with one end of the mounting portion are provided, and the small-diameter cylindrical portion and the large-diameter cylindrical portion have the same center hole diameter and are continuous, Female threads are engraved on the inner peripheral surface of these center holes, and male threads are engraved on the outer peripheral surface of the vehicle body inner surface side mounting member while fitting in the vehicle body hole insertion portion. A small-diameter cylindrical connecting portion is provided, and a flap protruding radially outward from one end of the connecting portion. It is provided with a contact portion for pressing the body inner surface to the tip of the di portion.

Alternatively, the fixed portion of the mounting member on the outer surface of the vehicle body is composed of a flange-shaped large-diameter portion projecting from one end of the vehicle body hole insertion portion composed of a small-diameter tubular portion, and the outer peripheral surface of the vehicle body hole insertion portion is formed. While the male screw is engraved, the connecting portion of the vehicle body inner surface side mounting member is externally fitted to the vehicle body hole insertion portion protruding from the vehicle body hole to the inner surface side of the vehicle body, and the female screw engraved on the inner peripheral surface thereof is attached. The outer peripheral surface of the vehicle body hole insertion portion is screwed into the male thread, and the tip end surface of the connecting portion is used as a contact portion that presses against the inner surface of the vehicle body.

The vehicle body outer surface side mounting member and the vehicle body inner surface side mounting member, which are made of the rigid material and have a substantially cylindrical shape, each include a pair of semi-cylindrical portions that are divided in two in the axial direction. It is preferable that a locking portion is provided on the first and the locking portions are locked to each other and removably connected to form a cylindrical portion. It should be noted that one of the divided ends may be integrally connected via a thin hinge.

[0013]

[Action]

 The body hole insertion part of the vehicle body outer surface side mounting member made of a rigid material that is fitted and fixed in advance to the electric wire mounting member made of the elastic material is penetrated into the vehicle body hole from the outside of the vehicle body, and the vehicle body inner surface side mounting member from the inside of the vehicle body. When the connecting portion of the vehicle body hole insertion portion is screwed and connected, the vehicle body outer surface abutting portion of the vehicle body outer surface side mounting member and the vehicle body inner surface abutting portion of the vehicle body inner surface side mounting member move toward each other, Both contact surfaces are pressed against the inner and outer surfaces of the vehicle body.

As described above, the abutment surface on the vehicle body outer surface side made of the elastic material is surely pressed against the vehicle body outer surface, so that the infiltration of water from the vehicle body hole can be reliably prevented. To fix the grommet in the vehicle body hole, simply penetrate the vehicle body insertion part of the vehicle body outer surface side mounting member into the vehicle body hole, and then screw the inner body surface mounting member from the vehicle body inner surface side and tighten the screws. Well, it can be fixed easily, and since the screws are tightened, the grommet can be securely fixed to the vehicle body.

[0015]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. 1 to 4 show a first embodiment, a grommet 10 of the present invention is a wire mounting member 11 made of rubber, a resin-molded vehicle outer surface side mounting member 12, and a resin-molded vehicle body inner surface side mounting member 13 as well. It is composed of three members.

As shown in FIGS. 2 (A), (B) and (C), the rubber electric wire mounting member 11 has a small diameter and long cylindrical portion, that is, a tubular electric wire fixing portion 11 a and the electric wire fixing portion. An inclined portion 11b is provided so as to project outward in the radial direction from the tip of 11a, and a cylindrical rigid member mounting portion 11c having a larger diameter than the tip of the inclined portion 11b is continuously provided. A small-diameter cylindrical portion 11d that projects inward in the radial direction is continuous to the tip of the rigid material mounting portion 11c, and a lip-shaped vehicle body outer surface contact portion 11e is projected from the outer peripheral surface of the small-diameter cylindrical portion 11d. . The wire bundle W (shown in FIG. 1) which penetrates the grommet pushes the wire fixing portion 11a of the wire mounting member 11 to penetrate it.

As shown in FIGS. 3 (A), (B), and (C), the resin-made vehicle body outer surface side mounting member 12 is a pair of semi-cylindrical members 12-that are formed by dividing a roughly cylindrical member into two at the axial center. I and 12-II, one of the split ends of these semi-cylindrical members is integrally formed by connecting via a thin hinge 12a, and the other of the split ends is hook-shaped on one side. Is provided on the other side, and the other is provided with a locking portion 12c having a locking hole for locking the hook-shaped locking portion 12b. By locking the locking portions 12b and 12c, a cylindrical shape is formed as shown in the figure.

In the state where the shape of the vehicle body outer surface side mounting member 12 is connected to the illustrated cylindrical shape, the mounting portion 12d including a large diameter cylindrical portion having an outer diameter protruding is provided on one end side of the cylindrical portion. First, the mounting portion 12d is internally fitted and mounted on the rigid member mounting portion 11c of the electric wire mounting member 11. Further, the cylindrical portion continuous with the mounting portion 12d made of the large-diameter cylindrical portion is a vehicle body hole insertion portion 12e made of a small-diameter cylindrical portion having an outer diameter smaller than the inner diameter of the vehicle body hole 3. The tip of the vehicle body hole insertion portion 12e is provided with a protrusion 12f for temporary locking that is slightly projected outward, so that the protrusion 12f can be easily bent when passing through the vehicle body hole 3. 12g in the axial direction from the tip.

The body hole insertion portion 12e including the small-diameter cylindrical portion and the attachment portion 12d including the large-diameter cylindrical portion have the same central hole diameter and are continuous, and the female screw 12h shown in FIG. Is engraved.

The body outer surface side mounting member 12 covers the electric wire bundle W penetrating the electric wire mounting member 11 from the side with the semi-cylindrical members 12-I and 12-II opened. The semi-cylindrical members 12-I and 12-II are engaged with the engaging portions 12b and 12c in a state where the electric wire bundle W is passed through the central hole to form a cylindrical shape.

In this state, the mounting portion 12d is pushed into the rigid member mounting portion 11c of the electric wire mounting member 11 to be internally fitted and fixed, and the mounting portion 12d presses the lip-shaped vehicle body outer surface contact portion 11e. There is. Further, the vehicle body hole insertion portion 12e is projected from the tip of the vehicle body outer surface contact portion 11e.

The vehicle body inner surface side mounting member 13 shown in FIGS. 4 (A), (B) and (C) also has a substantially cylindrical shape similarly to the vehicle body outer surface side mounting member 12, and a pair of half members divided into two at the axial center thereof. Cylindrical members 13-I and 13-II. The semi-cylindrical members are provided with hook-shaped engaging portions 13a at one end and hook-like engaging portions 13a at the other end, respectively. A locking portion 13b having a stop hole is provided. By locking these locking portions 13a and 13b, a cylindrical shape is formed as shown in the figure. Needless to say, like the vehicle body outer surface side mounting member 12, the vehicle body inner surface side mounting member 13 may be integrally formed by connecting one of the divided ends via a thin hinge.

In the state where the shape of the vehicle body inner surface side mounting member 13 is connected to the illustrated cylindrical shape, it will be fitted in the vehicle body hole insertion portion 12e and a male screw 13c will be engraved on the outer peripheral surface thereof. A small-diameter cylindrical connecting portion 13d is provided. Further, a flange portion 13e protruding outward in the radial direction from one end of the connecting portion 13d is provided, and an abutting portion 13f for press-contacting the inner surface of the vehicle body is provided at the tip of the flange portion 13e so as to be folded back in the same direction as the connecting portion 13e. .

As shown in FIG. 1, the vehicle body inner surface side mounting member 13 has semi-cylindrical members 13-I and 13-II for the wire bundle W penetrating the vehicle body hole 3 and protruding toward the vehicle body inner surface side. With the wire open from the side, the wire bundle W is passed through the center hole of the connecting part 13d, and the locking parts 13a and 13b of the semi-cylindrical members 13-I and 13-II are locked. It has a cylindrical shape.

An operation of attaching the grommet 10 to the vehicle body hole 3 of the vehicle body 4 will be described. The electric wire bundle W is closely attached to the electric wire fixing portion 11a of the electric wire mounting member 11 and penetrates the electric wire mounting member 11, and the vehicle body outer surface side mounting member 12 is attached to the electric wire mounting member 11 in advance. In this state, the electric wire bundle W is penetrated from the outer surface side X of the vehicle body 4 into the vehicle body hole 3, and the protruding vehicle body hole insertion portion 12e of the vehicle body outer surface side mounting member 12 is inserted into the vehicle body hole 3. At this time, although there is a protrusion 12f at the tip of the vehicle body hole insertion portion 12e, since the notch 12g is formed, it can be bent and easily passed. The protrusion 12f is locked to the peripheral edge of the vehicle body hole 3 on the inner surface side of the vehicle body to temporarily fix the electric wire mounting member 11 and the vehicle body outer surface side mounting member 12 to the vehicle body 4.

Next, on the inner surface side Y of the vehicle body 4, the vehicle body inner surface side mounting member 13 is laterally assembled to the wire bundle W, and the wire bundle W is penetrated through the center hole. In this state, the connecting portion 13d is internally fitted into the vehicle body hole inserting portion 12e while being screwed.

By the screwing of the screws 12h and 13c, the body outer surface contact portion 11e provided on the electric wire mounting member 11 is pressed by the large-diameter mounting portion 12d to be pressed against the vehicle body outer surface, while being mounted on the vehicle body inner surface side. The contact portion 13f of the member 13 is pressed against the inner surface of the vehicle body. Therefore, the grommet 10 can be securely fixed to the vehicle body 4 from both sides.

FIG. 5 shows a second embodiment of the present invention, in which a rubber wire attachment member 21 has a central hole 21a of the same diameter along the central axis as shown, but the outer surface is located from one end to the other end. It has a conical shape that expands toward it. The center hole 21a is an electric wire fixing portion that is in close contact with the electric wire bundle W to be penetrated, while the end surface on the large diameter side is a contact portion 21b to the outer surface of the vehicle body and is cut inward from the corresponding contact portion 21b. The rigid material mounting portion 21c is provided.

The rigid resinous body outer surface side mounting member 22 is composed of a vehicle body hole insertion portion 22a formed of a small-diameter cylindrical portion and a flange-shaped fitting portion 22b protruding from one end thereof. A male screw 22c is engraved on the outer peripheral surface of the portion 22a. The fitting member 22b of the mounting member 22 on the outer surface of the vehicle body is mounted by inserting it into the groove of the rigid material mounting portion 21c of the wire mounting member 21. In the mounted state, the vehicle body hole insertion portion 22a is projected from the vehicle body outer surface contact portion 21b.

The rigid vehicle body inner surface side mounting member 23 is provided with a cylindrical connecting portion 23a which is externally fitted to the vehicle body hole insertion portion 22a, and a female screw 23b is provided on the inner peripheral surface of the connecting portion 23a. It is provided. One end surface of the connecting portion 23a serves as an abutting portion 23c to the inner surface of the vehicle body, and an electric wire bundle holding portion 23d protruding inward is provided on the other end side.

Similarly to the first embodiment, the vehicle body inner surface side mounting member 23 is also divided into two parts in the central axis direction, and locking parts (not shown) for locking each other are provided at the divided ends. It should be noted that one of the split ends may be connected via a thin hinge. Alternatively, it may be formed into a cylindrical shape without being divided at all.

The grommet of the second embodiment is fixed to the vehicle body hole 3 similarly to the first embodiment. That is, the connection portion 23a of the vehicle body inner surface side mounting member 23 is externally fitted to the vehicle body hole insertion portion 22a which projects from the vehicle body hole 3 to the vehicle body inner surface side Y on the vehicle body inner surface side. By this screw tightening, the vehicle body outer surface contact portion 21b of the wire mounting member 21 is pressed against the vehicle body outer surface, and the tip end surface of the connecting portion 23a is contacted with the vehicle body inner surface contact portion 23c. Therefore, the grommet is securely fixed to the vehicle body 4.

[0033]

[Effect of device]

 As is clear from the above description, the grommet according to the present invention has a rigid resin outer body side mounting member to which a rigid resin outer body side mounting member is attached in advance to an electric wire mounting member made of an elastic material such as rubber. The cylindrical body hole insertion portion provided on the side mounting member is projected from the body hole to the inner surface of the vehicle body, and the cylindrical connecting portion provided on the resin inner body mounting member, which is also rigid, has the cylindrical connection portion described above. The grommet can be easily and reliably fixed to the vehicle body hole because it is screwed and connected to the.

Further, since the vehicle body outer surface abutting portion provided on the electric wire mounting member made of an elastic material is pressed against the vehicle body outer surface by tightening the screw, the vehicle body outer surface abutting portion can be surely adhered to the outer surface of the vehicle body, thereby improving the waterproof performance. It has various advantages.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

2A, 2B, and 2C are a left side view, a front view, and a right side view of the electric wire mounting member of the first embodiment.

3 (A), (B), and (C) are a left side view, a front view, and a right side view of the vehicle body outer surface side mounting member of the first embodiment.

4A, 4B, and 4C are a left side view, a front view, and a right side view of a vehicle body inner surface side mounting member of the first embodiment.

FIG. 5 is a sectional view of a second embodiment.

FIG. 6 is a cross-sectional view of a conventional example.

[Explanation of symbols]

 3 Vehicle Body Hole 4 Vehicle Body 10 Grommet 11 and 21 Electric Wire Mounting Member 11a Electric Wire Fixing Part 11c Rigid Material Mounting Part 11e Vehicle Body External Surface Abutting Part 12 Vehicle Body External Surface Mounting Member 12d Mounting Part 12e Vehicle Body Hole Inserting Part 12h Screw 13 Vehicle Body Inner Surface Mounting Member 13c Screw 13d connecting portion 13f vehicle body inner surface contact portion W electric wire

Claims (1)

[Scope of utility model registration request] 1. An electric wire mounting member made of an elastic material, a vehicle body outer surface side mounting member and a vehicle body inner surface side mounting member made of a rigid material, wherein the electric wire mounting member is a tube-shaped electric wire fixing member to be fitted onto a wire bundle. Portion, a rigid material mounting portion that projects radially outward from one end of the wire fixing portion, and a vehicle body outer surface abutting portion provided on the tip end surface of the rigid material mounting portion. The member has a cylindrical shape in which a large-diameter mounting portion that is internally fitted to the rigid material mounting portion and a small-diameter vehicle body hole insertion portion that penetrates the vehicle body hole are continuously provided, and its inner peripheral surface or the vehicle body insertion portion outer periphery A screw is engraved on the surface, and the vehicle body inner surface side mounting member has a shape in which a cylindrical connecting portion provided with a screw to be screwed into the vehicle body hole insertion portion and a vehicle body inner surface contact portion are integrally provided. , The vehicle body outer surface side mounting member is previously fixed to the electric wire mounting member, A hole inserting portion is penetrated from the outer surface to the body bore,
A grommet having a structure in which a connecting portion of a mounting member on the inner surface of the vehicle body is screwed into the hole insertion portion of the vehicle body from the inside of the vehicle body to press the outer surface of the vehicle body and the inner surface contact portion of the vehicle body to the outer surface and the inner surface side of the vehicle body, respectively.