Grommet

Abstract

To provide a grommet capable of improving an assembling property.SOLUTION: A grommet 1 comprises: an insertion part 3 in which an electric wire arranged between a first assembling member and a second assembling member that are arranged so as to be separated from each other is inserted; and a first engagement part 5 and a second engagement part 7 that are fitted into a through-hole of the first assembling member and a through-hole of the second assembling member, respectively, that are annularly and integrally formed on an outer periphery of the insertion part 3. The insertion part 3 comprises a first insertion part 9 where the first engagement part 5 is formed, and a second insertion part 11 where the second engagement part 7 is formed, that is formed as a separate body from the first insertion part 9, and joins the first insertion part 9 and the second insertion part 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a grommet. [Background technology]

[0002] Conventionally, a grommet includes a bellows-shaped tubular portion as an insertion portion through which an electric wire arranged between a vehicle body as a first attachment member and a door as a second attachment member arranged apart from each other is inserted. Also, a grommet is known that includes a pair of enlarged diameter tubular portions as fitting portions that are formed annularly integrally with the outer periphery of the bellows-shaped tubular portion and are respectively fitted into a through hole of the vehicle body and a through hole of the door (see Patent Document 1). In this grommet, the bellows-shaped tubular portion waterproofs the electric wire while preventing exposure of the electric wire, and the enlarged diameter tubular portion waterproofs the through hole while fixing the grommet to the vehicle body and the door. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-369348 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in a grommet such as that in Patent Document 1, when inserting an electric wire into the grommet, a tool is used to expand the insertion portion and then the electric wire is inserted. However, in a grommet such as that in Patent Document 1, the insertion portion is long, so a long jig is required, and the task of expanding the long jig is difficult, resulting in poor assembly performance.

[0005] The present invention has been made in view of the problems inherent in the conventional technology, and an object of the present invention is to provide a grommet that can be easily installed. [Means for solving the problem]

[0006] The grommet of this embodiment includes an insertion portion through which an electric wire arranged between a first assembly member and a second assembly member arranged at a distance is inserted, and a first fitting portion and a second fitting portion formed integrally with the outer periphery of the insertion portion in an annular shape and fitted into a through hole of the first assembly member and a through hole of the second assembly member, respectively. The insertion portion has a first insertion portion in which the first fitting portion is formed, and a second insertion portion formed separately from the first insertion portion and in which the second fitting portion is formed, and the first insertion portion and the second insertion portion are joined together. Effect of the Invention

[0007] According to the present invention, it is possible to provide a grommet that can improve the ease of installation. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a side view of the grommet according to the embodiment. [Diagram 2] FIG. 2 is a side view of a first member of the grommet according to the embodiment. [Diagram 3] FIG. 4 is a side view of a second member of the grommet according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the grommet according to the present embodiment will be described in detail with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for the convenience of explanation and may differ from the actual ratios.

[0010] As shown in FIG. 1, the grommet 1 according to this embodiment is applied to, for example, electric wires (not shown) of a wire harness (not shown) arranged between a vehicle body (not shown) as a first assembly member and a door (not shown) as a second assembly member arranged at a distance from each other. In the vehicle body, for example, electric components such as a power source for supplying electric power are arranged, and a through hole through which the electric wires are inserted is formed. In the door, for example, electric components for controlling the functions of the door are arranged, and a through hole through which the electric wires are inserted is formed. The wire harness is arranged by being inserted through the through hole of the vehicle body and the through hole of the door, and electrically connects the electric components on the vehicle body side to the electric components on the door side. The grommet 1 waterproofs the electric wires while protecting the electric wires located between the vehicle body and the door, and waterproofs the through hole while being fixed to the through hole of the vehicle body and the through hole of the door.

[0011] As shown in Figs. 1 to 3, grommet 1 is made of an elastic material such as rubber. Grommet 1 includes an insertion portion 3 through which an electric wire is inserted, and a first fitting portion 5 and a second fitting portion 7 formed integrally in an annular shape on the outer periphery of insertion portion 3. Insertion portion 3 includes a first insertion portion 9 located on the vehicle body side through which the electric wire is inserted, and a second insertion portion 11 located on the door side through which the electric wire is inserted. Grommet 1 includes a first member 13 arranged on the vehicle body side, and a second member 15 arranged on the door side.

[0012] As shown in FIGS. 1 and 2, the first member 13 includes a first insertion portion 9, a first fitting portion 5, and a first slit 17. As shown in FIG.

[0013] The first insertion portion 9 is formed in a cylindrical shape with an inner diameter set slightly smaller than the outer diameter of the electric wire so that it is arranged in close contact with the outer periphery of the electric wire. One end side of the first insertion portion 9 located inside the vehicle body is formed in a cylindrical shape with a constant radial thickness because it does not need to bend or expand and contract when the door is opened and closed. The other end side of the first insertion portion 9 located outside the vehicle body is formed in a bellows shape so that it can bend and expand and contract when the door is opened and closed. The length of the other end side of the first insertion portion 9 is set to be half the length of the electric wire arranged between the vehicle body and the door. Note that the one end side of the first insertion portion 9 may be formed in a bellows shape so that it can bend and expand and contract. The electric wire is inserted into the first insertion portion 9, and the inner peripheral surface is in close contact with the outer peripheral surface of the electric wire. By inserting the electric wire into the first insertion portion 9, the electric wire is protected by preventing exposure of the electric wire, while preventing water from adhering to the outer periphery of the electric wire, thereby waterproofing the electric wire.

[0014] The first fitting portion 5 is formed in a ring shape that continues in the circumferential direction from the outer periphery of the first insertion portion 9 toward the radially outward direction by a single member that continues from the outer periphery of the first insertion portion 9. The outer diameter of the first fitting portion 5 is set to be slightly larger than the inner diameter of the through hole of the vehicle body so that the first fitting portion 5 is disposed in close contact with the through hole of the vehicle body. A first engagement groove 19 is provided in the outer periphery of the first fitting portion 5 in a circumferential direction. The first engagement groove 19 engages with the edge of the through hole of the vehicle body when the first fitting portion 5 is inserted into the through hole of the vehicle body. By engaging the edge of the through hole of the vehicle body with the first engagement groove 19, the grommet 1 is fixed to the vehicle body, and water is prevented from entering the inside of the vehicle body through the through hole of the vehicle body, thereby waterproofing the through hole of the vehicle body.

[0015] The first slit 17 is formed along the length of the first insertion portion 9 from the first engagement groove 19 of the first fitting portion 5 toward the outside in the length direction of the first insertion portion 9 with respect to the first insertion portion 9 disposed inside the vehicle body. The first slits 17 are provided at positions that face each other in the radial direction with respect to the circumferential direction of the first insertion portion 9. The first slits 17 are opened at the ends located outside the length direction of the first insertion portion 9. By providing the first slits 17 in the first insertion portion 9, it is possible to easily expand the first insertion portion 9, and it is possible to easily insert an electric wire into the first insertion portion 9. In addition, by not forming the first slits 17 in the first engagement groove 19 of the first fitting portion 5, it is possible to prevent a gap from being formed between the edge of the through hole of the vehicle body and maintain waterproofness.

[0016] As shown in FIGS. 1 and 3, the second member 15 is formed separately from the first member 13, and includes a second insertion portion 11, a second fitting portion 7, and a second slit .

[0017] The second insertion part 11 is formed in a cylindrical shape with an inner diameter set slightly smaller than the outer diameter of the electric wire so that it is arranged in close contact with the outer periphery of the electric wire. The second insertion part 11 is formed in a bellows shape over its entire length so that it can be bent and expanded and contracted by opening and closing the door. The length of the part of the second insertion part 11 arranged outside the door is set to be half the length of the electric wire arranged between the car body and the door. The electric wire is inserted into the second insertion part 11, and the inner peripheral surface is in close contact with the outer peripheral surface of the electric wire. By inserting the electric wire into the second insertion part 11, the electric wire is protected by preventing exposure of the electric wire, and the electric wire is waterproofed by preventing water from adhering to the outer periphery of the electric wire.

[0018] The second fitting portion 7 is formed in a ring shape that continues in the circumferential direction toward the outside in the radial direction by a single member that is continuous from the outer periphery of the second insertion portion 11 to the second insertion portion 11. The outer diameter of the second fitting portion 7 is set to be slightly larger than the inner diameter of the through hole so that it is disposed in close contact with the through hole of the door. A second engagement groove 23 is provided in the outer periphery of the second fitting portion 7 that continues in the circumferential direction. The second engagement groove 23 engages with the edge of the through hole of the door when the second fitting portion 7 is inserted into the through hole of the door. By engaging the edge of the through hole of the door with the second engagement groove 23, the grommet 1 is fixed to the door, and water is prevented from entering the inside of the door through the through hole of the door, thereby waterproofing the through hole of the door.

[0019] The second slit 21 is formed along the length direction of the second insertion portion 11 from the second engagement groove 23 of the second fitting portion 7 toward the outside in the length direction of the second insertion portion 11 with respect to the second insertion portion 11 disposed inside the door. The second slits 21 are provided at positions facing each other in the radial direction with respect to the circumferential direction of the second insertion portion 11. The second slits 21 have an open end located outside the length direction of the second insertion portion 11. By providing the second slit 21 in the second insertion portion 11, the second insertion portion 11 can be easily expanded, and the electric wire can be easily inserted into the second insertion portion 11. In addition, by not forming the second slit 21 in the second engagement groove 23 of the second fitting portion 7, it is possible to prevent a gap from being formed between the second insertion portion 11 and the edge of the through hole of the door, and to maintain waterproofness.

[0020] The first member 13 and the second member 15 are assembled to the electric wire by expanding the first insertion portion 9 and the second insertion portion 11 with a jig, respectively, and inserting the electric wire therein. The first member 13 and the second member 15 assembled to the electric wire are integrated by joining the ends of the first insertion portion 9 and the second insertion portion 11, for example, by welding. By making the first insertion portion 9 and the second insertion portion 11 the insertion portion 3 through which the electric wire is inserted, it is not necessary to use a long jig when expanding the first insertion portion 9 and the second insertion portion 11. Therefore, the work of expanding the first insertion portion 9 and the second insertion portion 11 can be easily performed, and the assembling can be improved.

[0021] The joining of the first insertion portion 9 and the second insertion portion 11 is not limited to welding of the ends, but may be arranged so that the ends of the first insertion portion 9 and the second insertion portion 11 overlap each other, for example. Alternatively, the ends of the first insertion portion 9 and the second insertion portion 11 may be wrapped with tape.

[0022] Such a grommet 1 includes an insertion portion 3 through which an electric wire arranged between a first assembly member and a second assembly member arranged at a distance is inserted. Also, the insertion portion 3 includes a first fitting portion 5 and a second fitting portion 7 which are formed annularly integrally with the outer periphery of the insertion portion 3 and are fitted into a through hole of the first assembly member and a through hole of the second assembly member, respectively. The insertion portion 3 includes a first insertion portion 9 in which the first fitting portion 5 is formed, and a second insertion portion 11 which is formed separately from the first insertion portion 9 and in which the second fitting portion 7 is formed. The first insertion portion 9 and the second insertion portion 11 are joined together.

[0023] By configuring the insertion portion 3 through which the electric wire is inserted as the first insertion portion 9 and the second insertion portion 11, it is not necessary to use a long jig when expanding the first insertion portion 9 and the second insertion portion 11. Therefore, the work of expanding the first insertion portion 9 and the second insertion portion 11 can be easily performed, and the ease of assembly can be improved.

[0024] Therefore, with such a grommet 1, the ease of installation can be improved.

[0025] The first insertion portion 9 and the second insertion portion 11 are provided with a first slit 17 and a second slit 21 along the length direction, respectively.

[0026] By providing the first slit 17 and the second slit 21 in the first insertion portion 9 and the second insertion portion 11, the first insertion portion 9 and the second insertion portion 11 can be easily expanded, and electric wires can be easily inserted into the first insertion portion 9 and the second insertion portion 11. In addition, by not forming the first slit 17 and the second slit 21 in the first fitting portion 5 and the second fitting portion 7, it is possible to prevent a gap from being formed between the edge of the through hole and maintain waterproofing.

[0027] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.

[0028] For example, the first slit and the second slit are provided at positions that are radially opposed to each other in the circumferential direction of the first insertion portion and the second insertion portion, but this is not limited thereto. For example, the first slit and the second slit may be provided at one location or three or more locations in the circumferential direction of the first insertion portion and the second insertion portion. [Explanation of symbols]

[0029] 1 Grommet 3 Insertion part 5 First fitting part 7 Second fitting part 9 First insertion part 11 Second insertion part 17 First Slit 21 Second Slit

Claims

1. an insertion portion through which an electric wire is inserted, the insertion portion being disposed between a first assembly member and a second assembly member that are disposed apart from each other; a first fitting portion and a second fitting portion which are formed annularly integrally with an outer periphery of the insertion portion and are fitted into the through hole of the first assembly member and the through hole of the second assembly member, respectively; Equipped with The insertion portion includes a first insertion portion in which the first fitting portion is formed, and a second insertion portion formed separately from the first insertion portion in which the second fitting portion is formed, The first insertion portion and the second insertion portion are joined together.

2. The grommet according to claim 1 , wherein the first insertion portion and the second insertion portion are respectively provided with a first slit and a second slit along a longitudinal direction.

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