JP2012029408A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet which facilitates the assembly work while securing good waterproofness.SOLUTION: A grommet comprises: a grommet body 21; an inner plate 31 attached between a flat plate part 24 and an outer part 22 of the grommet body 21; a clamp 34 provided at the inner plate 31 and protruding from an insertion hole 28, which is formed at the flat plate part 24, to engage with a fix hole 19 formed at an end surface plate 17 of a door panel 15; and a seal part 27 provided so as to enclose an opening 25 in the flat plate part 24 of the grommet body 21 and firmly attached to the end surface plate 17 of the door panel 15 with the fix hole 19 engaged with the clamp 34 to seal a wiring place of a wire harness 13. The clamp 34 is placed on the outer peripheral side of the seal part 27 relative to the opening 25.

Description

  The present invention relates to a grommet that waterproofs and protects a wire harness wired between a vehicle body and a door of an automobile, for example.

  The wire harness wired between the vehicle body and the door of the automobile is protected by grommet and is protected.

  As this grommet, a through-less grommet is used in which the wire harness is wired along the door panel without providing a through-hole through which the wire harness passes through the door frame (see, for example, Patent Document 1).

  As shown in FIGS. 5 (a) and 5 (b), the penetration-free grommet 1 includes an inner portion 2 having rigidity, and an outer portion 3 that covers the inner portion 2 and has elasticity, and includes an inner portion 2. Further, a clip portion 5 that can be attached to the door panel 4 is provided. The outer portion 3 is provided with a water stop portion 7 that prevents water from entering the wiring portion of the wire harness 6 inside the outer portion 3 from between the outer panel 3 and the door panel 4.

JP 2005-86963 A

  By the way, since the grommet 1 having the above structure is provided so that the water stop portion 7 largely surrounds the wire harness 6 and the clip portion 5, the total length thereof is considerably long.

  For this reason, a large pressing force is required when the grommet 1 is pressed against the door panel 4 and the clip portion 5 is attached to the door panel 4, and a great amount of labor is required for the assembly work of the grommet 1.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the grommet which can aim at the ease of an assembly | attachment operation | work, ensuring favorable waterproofness.

In order to achieve the above-described object, the grommet according to the present invention is characterized by the following (1) or (2).
(1) A grommet that is attached to a mounted panel and wire-wires the wire harness to the mounted panel in a watertight manner,
A grommet main body integrally provided with a flat plate portion having an opening through which the wire harness is passed, on the mounting side of the outer portion provided with a tube through which the wire harness is passed, to the mounted panel;
An inner plate mounted between the flat plate portion and the outer portion of the grommet body;
A clamp that is provided in the inner plate and protrudes from an insertion hole formed in the flat plate portion and engages with a fixing hole formed in the mounted panel;
The wire harness is provided so as to surround at least a part of the opening in the flat plate portion of the grommet body, and is in close contact with the mounted panel in a state where the clamp is engaged with a fixing hole of the mounted panel. A seal portion for sealing the wiring part of
The said clamp is arrange | positioned with respect to the said opening part on the outer peripheral side of the said seal part.
(2) In the grommet configured as described in (1) above, the clamp is formed integrally with the inner plate.

In the grommet configured as described above (1), since the clamp is disposed on the outer peripheral side of the seal portion that is in close contact with the mounted panel and seals the wiring portion of the wire harness, the length of the seal portion can be shortened as much as possible. . Thereby, it is possible to minimize the pressing force when pressing the panel against the mounted panel and engaging the clamp with the fixing hole, and thus the assembling workability can be greatly improved.
In the grommet having the configuration (2), the work of fixing the clamp to the inner plate can be omitted, and the assembling workability can be further improved.

  ADVANTAGE OF THE INVENTION According to this invention, the grommet which can aim at the ease of an assembly | attachment operation | work can be provided, ensuring favorable waterproofness.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading through the modes for carrying out the invention described below with reference to the accompanying drawings.

It is a perspective view of the door panel with which the grommet concerning an embodiment was equipped. It is the perspective view seen from the wearing side of the grommet concerning an embodiment. It is the disassembled perspective view seen from the mounting side of the grommet concerning an embodiment. It is a perspective view which shows the other example of an inner plate. It is a figure which shows the prior art example of a grommet, Comprising: (a) is sectional drawing, (b) is the top view seen from the mounting side.

  Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings.

  1 is a perspective view of a door panel to which a grommet according to the embodiment is mounted, FIG. 2 is a perspective view of the grommet according to the embodiment as viewed from the mounting side, and FIG. 3 is an exploded perspective view of the grommet according to the embodiment as viewed from the mounting side. FIG.

  As shown in FIG. 1, a grommet 11 according to an embodiment of the present invention is provided on a door 12 provided to be rotatable with respect to a vehicle body of an automobile, and a wire harness 13 wired between the vehicle body and the door 12. Hold.

  The wire harness 13 includes a plurality of electric wires 14, and the electric wire 14 includes a conductive core wire obtained by twisting a plurality of strands made of metal such as copper and a covering portion made of a synthetic resin having insulation properties. A covered electric wire provided.

  With this wire harness 13, various signals and electric power are supplied from the vehicle body side to various devices such as a speaker, a switch unit, a door lock unit, and a power window motor attached to the door 12.

  The door 12 has a door panel 15 having an L-shaped cross-section formed from sheet metal or the like. The door panel 15 includes a panel plate 16 on which various devices are mounted, and an end surface plate 17 constituting an end surface of the panel plate 16 on the connection side with the vehicle body.

  A recess 18 is formed in the end face plate 17 of the door panel 15, and the grommet 11 is attached to the recess 18.

  A long weather strip 20 is provided on the end face plate 17 to which the grommet 11 is attached so as to pass over the grommet 11. When the door 12 is closed, the weather strip 20 is a sealing material that is in close contact with the vehicle body to seal a gap with the vehicle body and prevent intrusion of rainwater or the like from the outside. The door panel 15 has the weather strip 20 as a boundary, the panel plate 16 side being the indoor A side, and the opposite side of the panel plate 16 being the outdoor B side.

  As shown in FIGS. 2 and 3, the grommet 11 includes a grommet body 21, an inner plate 31, and a protector 41.

  The grommet body 21 is made of rubber or elastomer as an elastic material.

  The grommet main body 21 has an outer portion 22. One end of a bellows-like tube 23 is connected to the outer portion 22 on the outer side, and the wire harness 13 is passed through the tube 23. The other end of the tube 23 is connected to the vehicle body.

  The outer portion 22 is provided with a flat plate portion 24 on the side where the door panel 15 is attached to the end face plate 17 so as to overlap the outer portion 22. The outer portion 22 and the flat plate portion 24 are integrated by connecting their peripheral edges. An opening 25 is formed at the center of the flat plate portion 24, and the wire harness 13 is passed through the opening 25. The flat plate portion 24 is provided with a seal portion 27. The seal portion 27 is integrally formed with the grommet body 21 and is disposed so as to surround the periphery of the opening portion 25 on the outdoor B side. A seal part 27 separate from the grommet body 21 may be attached to the flat plate part 24.

  Furthermore, two insertion holes 28 are formed in the flat plate portion 24 on both sides of the opening portion 25 outside the seal portion 27.

  The outer portion 22 is provided with a positioning plate portion 29 formed at a right angle with respect to the flat plate portion 24 at the end on the indoor A side, and this positioning plate portion 29 contacts the panel plate 16 of the door panel 15. The grommet 11 is positioned on the door panel 15 by contact.

  The inner plate 31 is a flat plate molded from a synthetic resin and has a certain degree of rigidity. The inner plate 31 is mounted in the gap between the outer portion 22 and the flat plate portion 24 through the opening 25 of the flat plate portion 24.

  A window portion 32 is formed in the inner plate 31 at a position facing the connecting portion of the tube 23 in the outer portion 22, and the wire harness 13 is passed through the window portion 32.

  The inner plate 31 is formed with two mounting holes 33 on both sides of the window 32, and a synthetic resin clamp 34 is fixed to the mounting holes 33. The clamp 34 is provided with a flange portion 34a at the center, a fixed piece 34b is formed on one end side, and a locking piece 34c is formed on the other end side. When the clamp 34 is pushed into the mounting hole 33 of the inner plate 31 while twisting the fixing piece 34b, the fixing piece 34b enters the back side of the inner plate 31, so that the inner plate 31 is fixed to the flange portion 34a and the fixing piece. 34b. Thereby, the clamp 34 is fixed to the inner plate 31. The locking piece 34c of the clamp 34 is connected to the tip end of the clamp 34 so as to gradually spread toward the rear end side. The clamp 34 is inserted into the fixing hole 19 formed in the end face plate 17 of the door plate 15, whereby the locking piece 34 c is engaged with the back surface of the end face plate 17, so that the grommet 11 is attached to the door panel 15. .

  The inner plate 31 is formed with a plurality of engaging wall portions 36. Each of the engagement wall portions 36 has an engagement hole 36 a and is formed at a position along the inner edge of the opening 25 in a state where the inner plate 31 is mounted on the grommet main body 22.

  The protector 41 is molded from a synthetic resin and is attached to the inner plate 31. The protector 41 includes a cover part 42 and a guide part 43 connected to the cover part 42 at a substantially right angle. The cover part 42 has an outer shape smaller than the opening part 25 of the grommet main body 22, and is attached to the inner plate 31 attached to the grommet main body 22 so as to be overlapped in the opening part 25. The cover portion 42 has a plurality of engagement protrusions 44 on the periphery thereof, and by inserting these engagement protrusions 44 into the engagement holes 36 a of the engagement wall portion 36 of the inner plate 31, A cover portion 42 is attached to the inner plate 31. When the cover part 42 is thus attached to the inner plate 31, the guide part 43 is disposed so as to overlap the positioning plate part 29 of the grommet body 21.

  Moreover, the cover part 42 is formed in the shape where the inner plate 31 side was dented, and the guide part 43 is formed in the shape where the positioning plate part 29 side was dented. Thus, when the protector 41 is attached to the inner plate 31 mounted on the grommet body 22, the wire harness 13 is connected between the cover portion 42 and the inner plate 31 and between the guide portion 43 and the positioning plate portion 29. A wiring path that can be wired is formed.

  To assemble the grommet 11, first, the clamp 34 is fixed to the mounting hole 33 of the inner plate 31.

  Next, the inner plate 31 is inserted into the space between the outer portion 22 and the flat plate portion 24 of the grommet body 21 from the opening 25. At this time, the clamp 34 fixed to the inner plate 31 is passed through the insertion hole 28 of the grommet main body 21 and protruded to the mounting side to the door panel 15.

  Thereafter, the protector 41 is attached to the inner plate 31 by inserting the engaging protrusion 44 of the protector 41 into the engaging hole 36 a of the engaging wall portion 36 of the inner plate 31.

  In the grommet 11 assembled in this way, the tube 23 of the grommet body 21, the opening 25 of the flat plate portion 24, the window portion 32 of the inner plate 31, the cover portion 42 of the protector 41 and the inner plate 31, and the protector 41. Wiring through the wire harness 13 can be performed between the guide portion 43 and the positioning plate portion 29. The wiring of the wire harness 13 is performed before the protector 41 is attached.

  In order to attach the grommet 11 assembled as described above to the door panel 15, the clamp 34 is inserted into the fixing hole 19 of the end face plate 17 while being pressed into the recess 18 of the end face plate 17. In this way, the clamp 34 is engaged with the fixing hole 19 of the end face plate 17 of the door panel 15, the grommet 11 is attached to the door panel 15, and the seal portion 27 is in close contact with the end face plate 17.

  Here, in the grommet 11, since the clamp 34 is disposed on the outer peripheral side of the seal portion 27 that seals between the end plate 17 of the door panel 15, the seal portion 27 is disposed so as to surround the outer peripheral side of the clamp 34. Compared with the case where it was made, the length of the seal part 27 is shortened as much as possible. Thereby, the seal part 27 is pressed when it is pressed against the end face plate 17 of the door panel 15 and the clamp 34 is engaged with the fixing hole 19 of the end face plate 17. The repulsive force from is greatly reduced. For this reason, the pressing force when pressing and attaching the grommet 11 to the door panel 15 is also reduced, so that the assembling operator can easily attach the grommet 11 to the end face plate 17 of the door panel 15.

  When the grommet 11 is attached to the end face plate 17 of the door panel 15, the seal portion 27 of the grommet 11 is in close contact with the end face plate 17 so that the wiring location of the wire harness 13 is partitioned in a watertight manner with respect to the outside B side. To be waterproofed.

  As described above, according to the grommet 11 of the above embodiment, the clamp 34 is disposed on the outer peripheral side of the seal portion 27 that is in close contact with the end face plate 17 of the door panel 15 and seals the wiring portion of the wire harness 13. The length of 27 can be shortened as much as possible. As a result, the pressing force when the clamp 34 is engaged with the fixing hole 19 of the end face plate 17 by being pressed against the end face plate 17 of the door panel 15 can be reduced as much as possible, so that the assembling workability is greatly improved. Can do.

  In the above embodiment, the structure in which the separate clamp 34 is fixed to the inner plate 31 has been described, but the clamp 34 may be integrally formed with the inner plate 31 as shown in FIG. If it does in this way, the work process which fixes clamp 34 can be omitted, and the further improvement of assembly work nature can be aimed at.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

11 Grommet 13 Wire harness 15 Door panel (attached panel)
19 Fixing hole 21 Grommet body 22 Outer part 23 Tube 24 Flat plate part 25 Opening part 27 Sealing part 28 Insertion hole 31 Inner plate 34 Clamp

Claims (2)

A grommet that is mounted on a mounted panel and wire-wires the wire harness to the mounted panel in a watertight manner,
A grommet main body integrally provided with a flat plate portion having an opening through which the wire harness is passed, on the mounting side of the outer portion provided with a tube through which the wire harness is passed, to the mounted panel;
An inner plate mounted between the flat plate portion and the outer portion of the grommet body;
A clamp that is provided in the inner plate and protrudes from an insertion hole formed in the flat plate portion and engages with a fixing hole formed in the mounted panel;
The wire harness is provided so as to surround at least a part of the opening in the flat plate portion of the grommet body, and is in close contact with the mounted panel in a state where the clamp is engaged with a fixing hole of the mounted panel. A seal portion for sealing the wiring part of
The said grommet is arrange | positioned with respect to the said opening part on the outer peripheral side of the said seal part.   The grommet according to claim 1, wherein the clamp is integrally formed with the inner plate.

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