JP2016003725A - Attachment structure of packing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment structure of a packing having excellent attachment operability, capable of suppressing floating and turning-up of the packing, and capable of reducing a projection height of a slip-off prevention swollen part engaged to a bracket.SOLUTION: A packing storage groove 21 of a bracket 20 includes a plurality of packing attachment grooves 24 provided in a circumferential direction, penetrating the bottom part of the groove, and extending along the circumferential direction of the groove. A packing 30 includes: an annular packing body 31 fitted into the packing storage groove 21; an arc-shaped rib 321 projected to the packing body 31, and into which the packing attachment groove 24 can be inserted; a slip-off prevention swollen part 322 provided at the top part of the arc-shaped rib 321 and into which the packing attachment groove 24 can be inserted by elastic deformation; and an insertion inclination surface 322a formed at the front end of the slip-off prevention swollen part 322, and contracting the diameter of the slip-off prevention swollen part 322 when pressing to an opening edge 24a of the packing attachment groove 24.

Description

  The present invention relates to a packing mounting structure for fixing a packing to an annular packing receiving groove provided on one surface of a substantially disc-shaped bracket.

  In the following Patent Document 1, a grommet used when a wire harness is assembled by penetrating a panel of an automobile or the like is disclosed.

  As a wire harness insertion structure in the panel described above, there is a case where a substantially disc-shaped bracket that covers a large opening formed in the panel so as to be openable and closable is provided, and a wire harness insertion hole is provided in the bracket. In this case, a grommet that protects the wire harness is attached to the wire harness insertion hole formed in the bracket.

  Moreover, in said bracket, a packing may be mounted | worn at a peripheral part for the purpose of waterproofing the butt | matching part with a panel.

FIG. 8 shows an example of a packing mounting structure mounted on the bracket.
In FIG. 8, reference numeral 100 denotes a bracket attached to a vehicle body panel or the like, and reference numeral 110 denotes a packing attached to the bracket 100.

  The packing 110 includes a packing body 111 that fits into the packing housing groove 101 formed in the bracket 100, and a retaining protrusion 112 that protrudes from the packing body 111.

  The retaining protrusion 112 includes a columnar portion 112a through which a packing mounting hole 102 formed through the bottom of the packing receiving groove 101 can be inserted, a bulging portion 112b formed at the tip of the columnar portion 112a, and a bulging portion 112b. And a shaft portion 112c for pulling operation extending from the head.

  The bulging portion 112 b of the packing 110 has a spindle shape that bulges larger than the inner diameter of the packing mounting hole 102. Further, the pulling operation shaft-like portion 112 c of the packing 110 has a rod shape smaller in diameter than the inner diameter of the packing mounting hole 102.

  As shown in FIG. 9, the packing 110 is attached to the packing housing groove 101 by holding the pulling operation shaft-like portion 112 c protruding from the packing mounting hole 102 with a tool and pulling it in the arrow X1 direction. In the properly mounted state, as shown in FIG. 8, the bulging portion 112 b is caught by the opening edge of the packing mounting hole 102, and the packing 110 is prevented from dropping from the packing housing groove 101.

Japanese Utility Model Publication No. 6-72127

  However, in the packing mounting structure shown in FIGS. 8 and 9, the packing 110 is fixed at the pinpoint at the position where the retaining protrusion 112 is mounted. There is a possibility that the water will rise from the packing housing groove 101 or may be wrinkled, resulting in a decrease in waterproofness.

  Further, in the packing mounting structure shown in FIGS. 8 and 9, the protruding height H1 from the bracket 100 is increased due to the pulling operation shaft portion 112c extending from the bulging portion 112b. Could get in the way.

  Moreover, since the attaching operation of the packing 110 requires a pulling operation from the opposite side to the packing housing groove 101, there is a problem that the attaching operability is poor.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and it has good mounting operability, can prevent the packing from rising and twisting, and furthermore, a bulging portion for retaining to be engaged with the bracket. An object of the present invention is to provide a packing mounting structure that can reduce the protruding height of the packing.

The above-described object of the present invention is achieved by the following configuration.
(1) A packing mounting structure for fixing a packing to an annular packing receiving groove provided on one surface of a substantially disc-shaped bracket,
The packing housing groove includes packing mounting grooves that extend in the circumferential direction while penetrating the bottom of the groove to the other surface side of the bracket at a plurality of locations spaced in the circumferential direction.
The packing is
An annular packing body that fits into the packing receiving groove;
An arc-shaped rib projecting from the packing body in an arc shape along the extending direction of the packing mounting groove, and capable of being inserted through the packing mounting groove;
A bulging portion for retaining to be provided at the top of the arc-shaped rib and elastically deformed and capable of being inserted through the packing mounting groove;
An insertion inclined surface that is formed at the front end of the retaining bulge and is pressed against the opening edge of the packing mounting groove on the packing housing groove side, and reduces the diameter of the retaining bulge;
A packing mounting structure characterized by comprising:

  (2) The packing mounting structure according to (1), wherein the packing includes a jig receiving groove into which a packing pressing jig can be inserted on the back surface of the arc-shaped rib.

  According to the configuration of (1) above, after the packing is aligned with the packing receiving groove of the bracket, when the front surface of the packing body is pressed against the bottom surface side of the packing receiving groove, the front end of the retaining bulge is inserted. The inclined surface is pressed by the opening edge of the packing mounting groove on the packing housing groove side, the diameter of the bulging portion for retaining is reduced, and the bulging portion for retaining is passed through the packing housing groove.

  When the retaining bulge that has passed through the packing housing groove is restored to its original diameter by the elastic restoring force, the retaining bulge is caught by the opening edge on the outlet side of the packing mounting groove to prevent the bulging. Is fixed to the packing receiving groove of the bracket.

  That is, according to the configuration of the above (1), the packing is attached by pressing from one side of the bracket. Since the attachment is completed only from one side of the bracket, the attachment operability is good. .

  Further, the bulging portion for preventing the packing from coming off is provided at the top of the arc-shaped rib extending in the extending direction of the packing mounting groove, and the packing is extended over a wide range along the extending direction of the packing. Can be pressed into the packing receiving groove. Therefore, it is possible to prevent the packing from rising or dripping.

  Further, according to the configuration of (1), the packing is configured to be attached to the packing receiving groove by pressing the back surface thereof, and there is no need to project a shaft-like portion for pulling operation on the retaining bulge portion. . Therefore, it is possible to reduce the height at which the bulging portion for preventing the protrusion protrudes from the bracket.

  According to the configuration of (2) above, when attaching the packing, by applying a pressing force to the packing with the packing holding jig inserted into the jig receiving groove provided on the back surface of the arc-shaped rib, the arc-shaped rib. It is possible to press the substantially full length of the bulging part for retaining at the top of the seal against the opening edge of the packing mounting groove with a substantially uniform pressing force, and the bulging part for retaining can be easily inserted into the packing mounting groove. . Therefore, the packing attaching operation can be simplified.

  According to the packing mounting structure of the present invention, the mounting operability is good, the packing can be prevented from rising and twisting, and the protrusion height of the bulging portion for retaining to be engaged with the bracket is reduced. can do.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a perspective view of a bracket to which a packing is attached in an embodiment of a packing mounting structure according to the present invention. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is a perspective view showing a state of the bracket shown in FIG. 1 before the packing is attached. FIG. 4 is a longitudinal sectional view showing an operation when attaching the packing to the bracket in the packing attachment structure of one embodiment of the present invention. FIG. 5 is a perspective view showing a packing mounting structure of a comparative example. 6 is a cross-sectional view taken along line BB in FIG. 7 is a perspective view of the rear side of the bracket shown in FIG. FIG. 8 is a longitudinal sectional view of a conventional packing mounting structure. FIG. 9 is a longitudinal sectional view showing a state before the packing shown in FIG. 8 is attached.

  Hereinafter, a preferred embodiment of a packing mounting structure according to the present invention will be described in detail with reference to the drawings.

  1 to 4 show an embodiment of a packing mounting structure according to the present invention, and FIG. 1 is a perspective view of a bracket to which the packing is mounted by the packing mounting structure of one embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is a perspective view showing a state of the bracket shown in FIG. 1 before attaching the packing, and FIG. 4 shows the packing in the bracket mounting structure of the embodiment of the present invention. It is a longitudinal cross-sectional view which shows operation at the time of attachment.

  The packing mounting structure of this embodiment is a structure in which the packing 30 is fixed to an annular packing receiving groove 21 provided on one surface 22 of the substantially disc-shaped bracket 20.

  As shown in FIG. 1, the bracket 20 has a corrugated tube 41 inserted through the central portion of the disk, which serves as an exterior of the wire harness. And the grommet 51 which hold | maintains the corrugated tube 41 is equipped in the opening of the center part of the bracket 20 which the corrugated tube 41 penetrates.

  The packing accommodating groove 21 is concentric with the center of the bracket 20, and is provided on one surface (back surface in FIG. 3) 22 of the bracket 20. As shown in FIG. 2, the packing receiving groove 21 has a rectangular cross-sectional shape. Further, as shown in FIGS. 2 and 3, the packing housing groove 21 is provided with packing mounting grooves 24 at a plurality of locations separated in the circumferential direction.

  The packing mounting groove 24 is a groove that penetrates the bottom of the packing housing groove 21 to the other surface 23 side of the bracket 20. In this embodiment, the packing mounting groove 24 is provided at four locations at equal intervals in the circumferential direction of the packing housing groove 21. ing. As shown in FIG. 2, each packing mounting groove 24 is a groove whose groove width W <b> 1 is set smaller than the groove width W <b> 2 of the packing housing groove 21, and is installed near the center of the packing housing groove 21 in the width direction. Has been. Further, as shown in FIG. 3, the packing mounting groove 24 is formed in the shape of a long hole extending along the circumferential direction of the packing housing groove 21 and extending in the circumferential direction.

  As shown in FIG. 2, the packing 30 includes an annular packing body 31 that fits in the packing housing groove 21, a retaining protrusion 32 that protrudes from the front surface 31 a of the packing body 31, and the packing body 31. And a jig receiving groove 33 formed to be recessed in the back surface 31b.

  The front surface 31 a of the packing body 31 is a surface that contacts the bottom surface 21 a of the packing housing groove 21. The retaining projection 32 protruding from the front surface 31 a of the packing body 31 includes an arc-shaped rib 321 that protrudes from the front surface 31 a and can be inserted through the packing mounting groove 24, and a disengagement provided at the top of the arc-shaped rib 321. And a bulging portion 322 for stopping.

  The arc-shaped rib 321 is formed in an arc shape along the extending direction of the packing mounting groove 24. The arc-shaped rib 321 has a width (thickness) dimension t1 (see FIG. 4) set to a value substantially equal to or less than the groove width W1 of the packing mounting groove 24, and can be inserted through the packing mounting groove 24.

  The retaining bulge 322 is provided on the top of the arc-shaped rib 321. The retaining bulge 322 has a spindle shape having a width larger than the groove width W1 of the packing mounting groove 24, but can be inserted through the packing mounting groove 24 by being elastically deformed and reduced in diameter.

  The retaining bulge portion 322 includes an insertion inclined surface 322a formed at the front end and an extraction inclined surface 322b formed at the rear end.

  The insertion inclined surface 322a is a tapered inclined surface, and when pressed against the opening edge 24a (see FIG. 4) on the packing housing groove 21 side of the packing mounting groove 24, the diameter of the bulging portion 322 for retaining is reduced. .

  The extraction inclined surface 322b is an inclined surface that is inclined in the direction opposite to the insertion inclined surface 322a. When the extraction inclined surface 322b is pressed against the opening edge 24b (see FIG. 4) on the outlet side of the packing mounting groove 24, The diameter of the part 322 is reduced.

  The packing 30 described above is attached to the packing housing groove 21 by being pushed into the packing housing groove 21 from the other surface 23 side of the bracket 20.

  In the initial stage of the operation of pushing the packing 30 into the packing housing groove 21, the insertion inclined surface 322 a at the front end of the retaining protrusion 32 butts against the opening edge 24 a of the packing mounting groove 24. When the packing 30 is further pushed in this state, the retaining bulge portion 322 is elastically deformed by the pressing force acting on the insertion inclined surface 322a to reduce the diameter, and the retaining bulge portion 322 and the arc-shaped rib 321 are formed. The packing mounting groove 24 is inserted. Then, when the retaining bulge 322 that has passed through the packing mounting groove 24 is restored by an elastic force and returns to its original diameter, as shown in FIGS. The inclined surface 322 b for extracting the end is caught by the opening edge 24 b on the outlet side of the packing mounting groove 24, and the packing 30 is fixed to the packing housing groove 21.

  When the packing 30 is removed from the packing housing groove 21, as shown by an arrow X3 in FIG. 4, the top of the retaining bulge portion 322 is pressed toward the packing housing groove 21 so as to form an extraction inclined surface 322b. The retaining bulge portion 322 is reduced in diameter by the applied pressing force, and the retaining projection 32 is detached from the packing mounting groove 24.

  As shown in FIG. 4, the jig receiving groove 33 is a groove into which the packing holding jig 60 can be inserted. The jig receiving groove 33 is provided in an area corresponding to the area where the arc-shaped rib 321 is provided on the back surface 31 b of the packing body 31. The jig receiving groove 33 is formed in an arc shape similar to the arc-shaped rib 321 on the back surface 31 b of the packing body 31.

  The packing holding jig 60 is an arc plate-shaped jig whose cross-sectional shape at the front end matches the cross-sectional shape of the jig receiving groove 33 and extends in the extending direction of the jig receiving groove 33. When the packing 30 is mounted in the packing receiving groove 21, the pressing force can be applied to the entire length of the retaining projection 32 by pressing the packing 30 using the packing pressing jig 60. The retaining protrusion 32 of the packing 30 can be efficiently inserted into the packing mounting groove 24.

  In the packing mounting structure according to the embodiment described above, the packing 30 is positioned immediately above the packing receiving groove 21 of the bracket 20 and then presses the front surface 31a of the packing body 31 toward the bottom surface 21a of the packing receiving groove 21. Is done. Then, the insertion inclined surface 322a at the front end of the retaining bulge portion 322 is pressed against the opening edge 24a on the packing housing groove 21 side of the packing mounting groove 24, and the retaining bulge portion 322 is reduced in diameter and detached. The stop bulging portion 322 passes through the packing housing groove 21.

  Then, the retaining bulge portion 322 that has passed through the packing housing groove 21 is restored to its original diameter by an elastic restoring force. Then, the bulging portion 322 for retaining is hooked on the opening edge 24 b on the outlet side of the packing mounting groove 24 to prevent the retaining, and the packing 30 is fixed to the packing receiving groove 21 of the bracket 20.

  That is, in the packing mounting structure according to one embodiment, the packing 30 is mounted by pressing from one side of the bracket 20, and the mounting is completed only by operating from one side of the bracket 20. Good sex.

  Further, the bulging portion 322 for preventing the packing 30 from coming off is provided at the top of the arc-shaped rib 321 extending in the extending direction of the packing mounting groove 24, and has a wide range along the extending direction of the packing 30. As a result, the packing 30 can be pressed against the packing housing groove 21. Therefore, it is possible to prevent the packing 30 from rising or dripping.

  In the packing mounting structure of one embodiment, the packing 30 is configured to be attached to the packing housing groove 21 by pressing the back surface thereof, and a shaft-like portion for pulling operation is projected from the bulging portion 322 for retaining. There is no need. For this reason, the height at which the bulging portion 322 for preventing the protrusion protrudes from the bracket 20 can be reduced.

  In the packing mounting structure of one embodiment, when the packing 30 is mounted, a pressing force is applied to the packing 30 by the packing pressing jig 60 inserted into the jig receiving groove 33 provided on the back surface of the arc-shaped rib 321. By doing so, it is possible to press the substantially full length of the retaining bulge portion 322 at the top of the arc-shaped rib 321 against the opening edge 24a of the packing mounting groove 24 with a substantially equal pressing force, so that the retaining bulge can be easily performed. The part 322 can be inserted into the packing mounting groove 24. Therefore, the mounting operation of the packing 30 can be simplified.

[Comparative example]
5 to 7 show a packing mounting structure of a comparative example compared with the packing mounting structure of the above-described embodiment.

  In the case of this comparative example, the packing 110 mounted in the packing receiving groove 21 of the bracket 20 includes a packing main body 111 that fits into the packing receiving groove 21, a retaining protrusion 112 that protrudes from the packing main body 111, and It has.

  The retaining projection 112 includes a columnar portion 112a through which a packing mounting hole 27 formed through the bottom of the packing receiving groove 21 can be inserted, a bulging portion 112b formed at the tip of the columnar portion 112a, and a bulging portion 112b. And a shaft portion 112c for pulling operation extending from the head.

  The bulging portion 112 b of the packing 110 has a spindle shape that bulges larger than the inner diameter of the packing mounting hole 27. Further, the pulling operation shaft-like portion 112 c of the packing 110 has a rod shape smaller than the inner diameter of the packing mounting hole 27.

  The packing 110 is mounted in the packing housing groove 101 by holding the pulling operation shaft portion 112c protruding from the packing mounting hole 27 with a tool and pulling it in the direction of the arrow X4 in FIG. In the properly mounted state, as shown in FIG. 7, the bulging portion 112 b is caught on the opening edge on the outlet side of the packing mounting hole 27, and the packing 110 is prevented from dropping from the packing housing groove 21.

  In the packing mounting structure shown in FIGS. 5 to 7, the packing 110 is fixed to the pinpoint at the position where the retaining protrusion 112 is mounted. There is a possibility that the water will rise from the housing groove 101 or bend, resulting in a decrease in waterproofness.

  Further, in the packing mounting structure shown in FIGS. 5 to 7, the protruding height H1 from the bracket 100 is increased due to the pulling operation shaft portion 112c extending from the bulging portion 112b. May get in the way.

  In addition, in the packing mounting structure shown in FIGS. 5 to 7, since the packing operation of the packing 110 requires a pulling operation from the side opposite to the packing housing groove 101, there is a problem that the mounting operability is poor.

  In the packing mounting structure of the above-described embodiment, the above-described inconvenience occurring in the packing mounting structure of the comparative example shown in FIGS. 5 to 7 can be solved.

  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.

  For example, in the above-described embodiment, the jig receiving groove 33 is provided on the back surface of the packing 30 in order to facilitate the pushing operation of the packing 30, but the jig receiving groove 33 may not be provided.

  Here, the features of the above-described packing mounting structure according to the present invention will be briefly summarized in [1] to [2], respectively.

[1] A packing mounting structure for fixing a packing (30) to an annular packing receiving groove (21) provided on one surface of a substantially disc-shaped bracket (20),
The packing housing groove (21) has a packing mounting groove extending in the circumferential direction while penetrating the bottom of the groove to the other surface (23) side of the bracket (20) at a plurality of locations spaced in the circumferential direction. (24)
The packing (30)
An annular packing body (31) fitted in the packing receiving groove (21);
An arc-shaped rib (321) projecting from the packing body (31) in an arc shape along the extending direction of the packing mounting groove (24), and capable of being inserted through the packing mounting groove (24);
A bulging portion (322) for retaining that is provided at the top of the arcuate rib (321) and elastically deformed and can be inserted through the packing mounting groove (24);
Formed at the front end of the retaining bulge (322) and pressed against the opening edge (24a) on the packing receiving groove (21) side of the packing mounting groove (24), the retaining bulge An inclined surface for insertion (322a) for reducing the diameter of the portion (322);
A packing mounting structure characterized by comprising:

  [2] The packing (30) includes a jig receiving groove (33) into which a packing pressing jig (60) can be inserted on the back surface of the arc-shaped rib (321). ] The packing mounting structure described in the above.

20 Bracket 21 Packing receiving groove 23 Other surface 24 Packing mounting groove 24a Opening edge 30 Packing 31 Packing body 33 Jig receiving groove 321 Arc-shaped rib 322 Protruding part 322a Inserting inclined surface 60 Packing holding jig

Claims (2)

A packing mounting structure for fixing a packing to an annular packing receiving groove provided on one surface of a substantially disc-shaped bracket,
The packing housing groove includes packing mounting grooves that extend in the circumferential direction while penetrating the bottom of the groove to the other surface side of the bracket at a plurality of locations spaced in the circumferential direction.
The packing is
An annular packing body that fits into the packing receiving groove;
An arc-shaped rib projecting from the packing body in an arc shape along the extending direction of the packing mounting groove, and capable of being inserted through the packing mounting groove;
A bulging portion for retaining to be provided at the top of the arc-shaped rib and elastically deformed and capable of being inserted through the packing mounting groove;
An insertion inclined surface that is formed at the front end of the retaining bulge and is pressed against the opening edge of the packing mounting groove on the packing housing groove side, and reduces the diameter of the retaining bulge;
A packing mounting structure characterized by comprising:   2. The packing mounting structure according to claim 1, wherein the packing includes a jig receiving groove into which a packing pressing jig can be inserted on the back surface of the arc-shaped rib.

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