JP6310273B2 - Grommet - Google Patents

Description

  The present invention relates to a grommet that is interposed between a through hole provided in a predetermined panel and a wire harness that passes through the through hole and is fixed to the panel.

  A wide variety of electronic devices are mounted on a vehicle as a moving body. These electronic devices are connected by a wire harness in order to transmit electric power, a control signal, etc. between each other. Grommets are used when such a wire harness is routed through the panel of the vehicle body. The grommet is fixed to the panel by being interposed between a through hole provided in the panel and a wire harness passing through the through hole. Most of the grommets are formed of an elastic body, and the wire harness is protected by the grommets from the inner peripheral edge of the through hole of the hard panel. In addition, the grommet may play a role of waterproofing to prevent water from entering from the through hole of the panel.

  Generally, the grommet is provided with a wire harness insertion hole through which the wire harness is inserted. In many cases, the wiring harness is routed in a state where the wire harness is inserted into the wire harness insertion hole of the grommet. Then, after passing the wire harness through the through hole of the panel, the grommet is aligned with the through hole, and the grommet is fixed to the panel by a predetermined bracket or the like. At this time, if the grommet moves too much along the wire harness during the routing, the positioning after the routing becomes troublesome. If a part that can be used for temporarily fixing the grommet, such as a protector, is attached to the wire harness, the movement of the wire harness during routing can be suppressed. However, if the position of the temporary fixing seems to be far away from the regular grommet arrangement position, the positioning after the arrangement is also troublesome.

  In view of this, it has been proposed to form a fitting portion for temporary fixing that is locked to the inner peripheral edge of a through hole provided in the panel on the outer peripheral surface of the grommet (see, for example, Patent Document 1). According to this, the wiring harness can be routed in a state where the grommet is temporarily fixed to the panel, and the labor for positioning the grommet after the routing is reduced.

JP 2000-295739 A

  Here, in the technique described in Patent Literature 1, when the grommet is temporarily fixed to the panel, the grommet is locked by the fitting portion for temporarily fixing over the inner peripheral edge of the through hole. The grommet is formed of an elastic body, and when temporarily fixing, the operator pushes the grommet into the through-hole of the panel and deforms the grommet, and such overpass is performed. However, when the wire harness is thick and the size of the grommet is large, the resistance when pushing into the through hole is large although the grommet can be deformed, and the temporary fixing itself becomes a burden on the operator. . On the other hand, in order to suppress such pushing resistance, for example, if the width of the fitting portion for the temporary fixing to the inner peripheral edge of the through hole is suppressed, the temporary fixing becomes insufficient, and the grommet is inserted into the through hole during wiring. There is a risk of losing.

  An object of the present invention is to provide a grommet that can be easily temporarily fixed to a through-hole of a panel and that is prevented from coming off from a through-hole in a wire harness wiring.

The invention according to claim 1, which achieves the above object, is a grommet that is fixed between the through hole provided in a predetermined panel and a wire harness that passes through the through hole, and is fixed to the panel. A cylindrical portion that is formed in a body and is fitted into the through hole in a predetermined fitting direction, and extends from the outer peripheral surface of the cylindrical portion to a bowl shape having a diameter larger than the diameter of the through hole. A flange portion that can be in close contact with the panel, and a plurality of protrusions that protrude from the outer peripheral surface of the cylindrical portion at a distance from each other in the circumferential direction on the front side of the flange portion with respect to the flange portion. A plurality of temporary fixing protrusions that are locked to an edge of the through hole and temporarily fix the cylindrical portion to the panel, and the flange portion has a smaller diameter than the outer diameter of the flange portion, and The plate is provided with a plate-like bracket provided with a second through-hole through which the cylindrical portion passes. And the inner peripheral edge of the second through hole is fitted on the outer peripheral surface of the cylindrical portion on the rear side in the fitting direction with respect to the flange portion. A groove is provided, and from the outer peripheral edge of the flange portion, a rotation projection for preventing rotation of the bracket with respect to the tube portion protrudes, and the surface of the bracket on the panel side faces the rotation stop. The grommet is characterized in that a rotation-recessing recess into which the protrusion fits is provided .

  According to a second aspect of the present invention, in the grommet according to the first aspect, at least one temporary fixing protrusion of the plurality of temporary fixing protrusions is more than the other temporary fixing protrusions. It is characterized by being formed wide in the circumferential direction.

  According to a third aspect of the present invention, in the grommet according to the first or second aspect, an interval between the plurality of temporary fixing protrusions and the flange portion is wider than a thickness of the panel.

According to the first aspect of the present invention, the plurality of temporary fixing protrusions for temporarily fixing the cylindrical portion of the grommet to the panel protrude from the outer peripheral surface of the cylindrical portion at intervals from each other in the circumferential direction. For this reason, when these plurality of temporary fixing protrusions get over the edge of the through hole of the panel and are locked to the edge, each temporary fixing protrusion can individually get over the edge. Thereby, the resistance when an operator pushes the cylinder part of a grommet into the through-hole of a panel at the time of temporary fixing is reduced. In addition, according to the first aspect of the present invention, it is not necessary to suppress the width of the hooks on the inner peripheral edge of the through hole for each temporary fixing protrusion, and sufficient temporary fixing is performed so that the grommet in the wiring It is possible to suppress detachment from the through hole. As described above, according to the first aspect of the present invention, it is possible to easily temporarily fix the panel in the through hole, and to suppress the disengagement from the through hole in the wire harness wiring.
According to the first aspect of the present invention, a groove into which the inner peripheral edge of the second through hole in the bracket used for fixing the collar portion to the panel is provided on the outer peripheral surface of the cylindrical portion of the grommet. Yes. Thereby, temporary fixing to the panel in a state where the bracket is attached to the grommet becomes possible. As a result, according to the first aspect of the present invention, it is possible to reduce the trouble of fixing the grommets to the panel.
According to the first aspect of the present invention, the grommet is provided with the rotation stop projection, and the bracket is provided with the rotation stop recess into which the rotation stop projection is fitted. Thereby, temporary attachment to the panel with the bracket attached is performed in a state in which the bracket is prevented from rotating. As a result, according to the first aspect of the present invention, troubles such as positioning of the bracket when the grommets are fixed to the panel can be reduced.

  According to the invention described in claim 2, at least one temporary fixing protrusion among the plurality of temporary fixing protrusions is formed wider in the circumferential direction of the cylindrical portion than the other temporary fixing protrusions. . As a result, for example, it is possible to further suppress the detachment from the through hole in the wiring harness wiring by performing an operation such as arranging the above-mentioned wide temporary fixing protrusion at a position where a load is easily applied when wiring the wiring harness. It becomes.

  According to the invention described in claim 3, since the interval between the plurality of temporary fixing protrusions and the flange is wider than the thickness of the panel, the temporary protrusion is moved over the edge of the through hole of the panel. Extra force to press is unnecessary, and the grommet can be temporarily fixed more easily.

It is a perspective view which shows the state with which the grommet of 1st Embodiment and the bracket used for fixation of the grommet to the panel of a vehicle body were combined. It is a top view which shows the state with which the grommet and bracket which were shown in FIG. 1 were combined. It is a three-plane figure which shows the side surface of the grommet, the rear surface seen from the back of the insertion direction to the through-hole of a panel, and the front surface seen from the front of the insertion direction. FIG. 4 is a perspective view of the grommet shown in FIG. 3. It is sectional drawing which shows the BB cross section of the grommet shown by FIG. It is an enlarged view of the area | region C in FIG. It is the perspective view which looked at the bracket from the panel side. It is a figure which shows the plane which looked at the bracket from the arrow D direction in FIG. 7, and the EE cross section in the figure. It is a figure which shows the cross section similar to FIG. 5 in the state which combined the grommet and the bracket and was fixed to the panel. FIG. 10 is an enlarged view of a region F in FIG. 9. It is a figure shown about the temporary fix | stop procedure to the panel of a grommet. It is a perspective view which shows the state with which the grommet of 2nd Embodiment and the bracket used for fixation of the grommet to the panel of a vehicle body were combined. It is a three-plane figure which shows the side surface of the grommet, the rear surface seen from the back of the insertion direction to the through-hole of a panel, and the front surface seen from the front of the insertion direction.

  The grommet of 1st Embodiment of this invention is demonstrated with reference to FIGS. FIG. 1 is a perspective view showing a state in which the grommet according to the first embodiment and the bracket used for fixing the grommet to the panel of the vehicle body are combined. FIG. 2 is a plan view showing a state in which the grommet and the bracket shown in FIG. 1 are combined.

  Grommet 1 is formed of an elastic body, and is fixed to panel P by being interposed between through hole P1 provided in panel P of the vehicle body and wire harness WH passing through this through hole P1. This fixing is performed using a metal-made plate-like bracket 2. Two screw holes 21 are provided in the bracket 2, and two screw holes P 2 are also provided in the panel P of the vehicle body. The bracket 2 pushes the grommet 1 fitted into the through-hole P1 in the fitting direction A indicated by an arrow in the figure against the panel P, and the panel 2 by screws (not shown) passing through the screw holes 21 and P2. P is fixed. The wire harness WH is protected by the grommet 1 from the inner peripheral edge of the through hole P1 of the hard panel P. In addition, the grommet 1 plays a role of waterproofing that prevents water from entering from the through hole P1 of the panel.

  FIG. 3 is a three-view diagram illustrating a side surface of the grommet, a rear surface viewed from the rear in the fitting direction into the through hole of the panel, and a front surface viewed from the front in the fitting direction. 3 (a) shows a rear view of the grommet 1, FIG. 3 (b) shows a side view of the grommet 1, and FIG. 3 (c) shows a front view of the grommet 1. The figure is shown. FIG. 4 is a perspective view of the grommet shown in FIG. 5 is a cross-sectional view showing a BB cross section of the grommet shown in FIG. 3, and FIG. 6 is an enlarged view of a region C in FIG.

  As shown in these drawings, the grommet 1 has a first cylindrical portion 111 through which the wire harness WH is inserted, and a diameter larger than that of the first cylindrical portion 111, toward the fitting direction A. It has the 2nd cylinder part 112 (cylinder part) engage | inserted by the through-hole P1 of the panel P. FIG. The first tubular part 111 is provided with a wire harness insertion hole 111a through which the wire harness WH is inserted, and the vicinity of the distal end in the fitting direction A is located inside the second tubular part 112. .

  The leading edge in the fitting direction A of the first cylinder part 111 and the rear edge of the fitting direction A of the second cylinder part 112 are connected by a substantially funnel-shaped thin-walled flexible part 113. Due to the connection at the flexible portion 113, the first tube portion 111 can move together with the wire harness WH inserted through the wire harness insertion hole 111a. Thereby, the improvement in the freedom degree in wiring of the wire harness WH is achieved.

  Moreover, in the 1st cylinder part 111, the three lips 111b which are pressed against the wire harness WH and closely_contact | adhere while deform | transforming protrude from the inner surface of the wire harness insertion hole 111a. These lips 111b provide water resistance against water entering from the wire harness insertion hole 111a.

  In addition, the grommet 1 includes a flange portion 120 that extends from the outer peripheral surface 112 a of the second cylindrical portion 112 into a bowl shape larger than the diameter of the through hole P <b> 1 of the panel P and can be in close contact with the panel P. The flange 120 is sandwiched between the bracket 2 and the panel P in a state where the second cylindrical portion 112 is fitted in the through hole P1, and is fixed by being pressed against the panel P. The fixing of the flange portion 120 by the bracket 2 will be described in detail later.

  Further, from the periphery of the front surface of the hook portion 120 in the fitting direction A, a lip 120a that is pressed against the panel P and deformed while the hook portion 120 is fixed by the bracket 2 protrudes in an annular shape. ing. The lip 120a provides waterproofing against water that is about to enter from the through hole P1 of the panel P.

  The grommet 1 includes three temporary fixing protrusions 130 that temporarily fix the second cylindrical portion 112 to the panel P until the flange portion 120 is fixed to the panel P. These three temporary fixing protrusions 130 are three protrusions protruding from the outer peripheral surface 112a of the second cylindrical portion 112 at a distance from each other in the circumferential direction on the front side in the fitting direction A with respect to the flange portion 120. Part. These three temporary fixing protrusions 130 are formed in the through holes by the outer peripheral surface 112a of the second cylindrical portion 112 being bent inward of the through holes P1 when the second cylindrical portion 112 is fitted into the through holes P1 of the panel P. It gets over the edge of P1 and is locked to that edge. By this locking, the grommet 1 is temporarily fixed to the panel P. This temporary fixing will be described in detail later.

  In addition, the three temporary fixing protrusions 130 are provided along one circumferential protrusion 131 having a relatively large width along the circumferential direction of the second cylindrical part 112 and the circumferential direction of the second cylindrical part 112. It consists of two narrow protrusions 132 having relatively small width dimensions. In the present embodiment, the wiring harness WH is routed in a state where the grommet 1 is temporarily fixed to the panel P. And the temporary fixing of the grommet 1 is performed so that the wide protrusion 131 may be located in the position where load is most applied by the bending of the wire harness WH at the time of wiring.

  Here, as shown in FIG. 1 and FIG. 2, the temporary fixing of the grommet 1 to the panel P includes the grommet 1 and the bracket 2 used for fixing the flange 120 of the grommet 1 to the panel P. Performed in a combined state. FIG. 7 is a perspective view of the bracket as seen from the panel side. Moreover, FIG. 8 is a figure which shows the plane which looked at the bracket from the arrow D direction in FIG. 7, and the EE cross section in the figure. FIG. 8A shows a plan view of the bracket 2, and FIG. 8B shows a cross-sectional view of the bracket 2.

  The bracket 2 is a substantially plate-shaped member, and has two screw holes 21 and a bracket-side through hole 22 (second second) through which the second cylindrical portion 112 passes through the second cylindrical portion 112 having a smaller diameter than the outer diameter of the flange portion 120 of the grommet 1. A through-hole) is provided. The inner peripheral edge 22a of the bracket-side through hole 22 is erected in the out-of-plane direction of the bracket 2 and has a cylindrical shape. Further, on the outer peripheral side of the cylindrical inner peripheral edge 22a, a protruding ring 23 protruding in an annular shape in the direction of the panel side indicated by the arrow D in FIGS. 7 and 8B is formed.

  In the grommet 1, as shown in FIGS. 3, 5, and 6, on the outer peripheral surface 112 a of the second cylindrical portion 112 on the rear side in the fitting direction A from the flange portion 120, The following grooves 112b are provided. First, the end on the rear side in the fitting direction A in the second cylindrical portion 112 is a protruding portion 112c that protrudes in an annular shape to the outside of the cylinder. Further, the peripheral edge of the surface of the flange portion 120 opposite to the fitting direction A is a raised portion 120b that is raised in an annular shape on the side opposite to the lip 120a. A space surrounded by the overhanging portion 112c, the raised portion 120b, and the flange portion 120 is a groove 112b in which the above-described cylindrical inner peripheral edge 22a and the protruding ring 23 in the bracket 2 are fitted. By fitting the inner peripheral edge 22a of the bracket side through hole 22 and the protruding ring 23 into the groove 112b, the grommet 1 and the bracket 2 are combined and fixed to the panel P of the vehicle body.

  9 is a view showing a cross section similar to FIG. 5 in a state where the grommet and the bracket are combined and fixed to the panel, and FIG. 10 is an enlarged view of a region F in FIG. The combination of the grommet and the bracket is performed by fitting the bracket 2 to the grommet 1 in the arrow G direction. At this time, the second cylindrical portion 112 is bent inwardly, and the projecting portion 112c projecting in an annular shape from the rear end portion in the fitting direction A to the panel P is formed in the bracket side through hole 22. Get over the inner periphery 22a. Thereby, the inner peripheral edge 22a and the protruding ring 23 following the inner peripheral edge 22a are fitted into the groove 112b.

  Further, in the grommet 1, as shown in FIGS. 1 and 4, a rotation projection 120 c for preventing the bracket 2 from rotating with respect to the second cylindrical portion 112 protrudes from the outer peripheral edge of the flange portion 120. ing. As shown in FIG. 1 and FIG. 7, the surface of the bracket 2 on the panel P side is provided with a rotation recess 24 into which the rotation protrusion 120 c is fitted. Here, in the bracket 2, the back side of the anti-rotation recess 24 bulges according to the anti-rotation recess 24. FIG. 8A showing a surface of the bracket 2 opposite to the panel P side shows a bulge 24 ′ on the back side of the anti-rotation recess 24.

  The grommet 1 and the bracket 2 are configured such that the inner peripheral edge 22a and the protruding ring 23 of the bracket side through-hole 22 are fitted into the groove 112b of the grommet 1, and the anti-rotation projection 120c of the grommet 1 is engaged with the anti-rotation recess 24 of the bracket 2. Combined and packed. FIG. 1 shows a state where the grommet 1 and the bracket 2 are combined in this way.

  9 and 10, the second cylindrical portion 112 of the grommet 1 is fitted in the through hole P1 of the panel P in the fitting direction A, and the flange portion 120 is attached to the panel P by the bracket 2. Fixed. At this time, as shown in FIG. 10, the flange 120 is sandwiched between the protruding ring 23 of the bracket 2 and the panel P. When the bracket 2 is screwed to the panel P, the projecting ring 23 presses the flange 120 against the panel P. As a result, the lip 120a protruding from the flange portion 120 toward the panel P is pressed against the panel P in the fitting direction A to be deformed, and is in close contact with the panel P. Thereby, waterproofing is achieved.

  Furthermore, in this embodiment, a protector (not shown) is attached to the wire harness WH. As shown in FIGS. 7 and 8, the bracket 2 is provided with two fastening pieces 25 and 26 for fastening the protector to the bracket 2. The first fastening piece 25 is a rectangular plate-like piece extending in the in-plane direction of the bracket 2 and is provided with a circular through hole 25a for fastening. The second fastening piece 26 is a rectangular plate-like piece standing in the out-of-plane direction of the bracket 2, and is provided with a triangular through hole 26 a for fastening.

  Here, as described above, in this embodiment, the wiring harness WH is routed in a state where the grommet 1 is temporarily fixed to the panel P. The temporary fixing of the grommet 1 to the panel P is performed after the grommet 1 and the bracket 2 are combined as described above. This temporary fixing is performed in the following procedure.

  FIG. 11 is a diagram showing a procedure for temporarily fixing the grommet to the panel. In this temporary fixing, as shown in FIG. 11 (a), first, the grommet 1 combined with the bracket 2 is inserted into the through hole P1 of the panel P of the vehicle body and the second cylindrical portion 112 is inserted in the direction A. It is arrange | positioned in the position fitted in. Due to this arrangement, the temporary fixing protrusion 130 protruding from the outer peripheral surface 112a of the second cylindrical portion 112 on the front side in the fitting direction A with respect to the flange portion 120 contacts the inner peripheral edge of the through hole P1 of the panel P. Touch.

  Next, when the grommet 1 is pushed into the through hole P1 in the fitting direction A, as shown in FIG. 11B, the outer peripheral surface 112a of the second cylindrical portion 112 is inside the through hole P1. Bend. Then, when the grommet 1 is further pushed in the fitting direction A, as shown in FIG. 11C, the temporary fixing protrusion 130 gets over the edge of the through hole P1 and is locked to the edge. By this locking, the grommet 1 is temporarily fixed to the panel P.

  Here, in the present embodiment, the engagement surface 130a of the three temporary fixing protrusions 130 for temporarily fixing the second cylindrical portion 112 of the grommet 1 to the panel P and the tip of the lip 120a protruding from the flange portion 120 The interval is wider than the thickness of the panel P. For this reason, the lip 120a is not pressed against the panel P at the time of temporary fixing. Thereby, when the temporary fixing protrusion 130 gets over the edge of the through-hole P1 of the panel P as described above, the flange portion 120 does not get in the way, and the force necessary for this getting over is suppressed. Further, when the grommet 1 is fixed to the panel P by the bracket 2, the temporary fixing protrusion 130 is separated from the panel P as shown in FIG. 10.

  Thus, the wiring harness WH is routed in a state where the grommet 1 is temporarily fixed to the panel P, and then the bracket 2 is screwed to the panel P, so that the flange portion 120 of the grommet 1 is attached to the panel. P is fixed. As shown in FIG. 1 and FIG. 4, the three temporary fixing protrusions 130 include one wide protrusion 131 having a relatively wide width in the circumferential direction of the second cylindrical portion 112, and the second It consists of two narrow protrusions 132 that are relatively narrow in the circumferential direction of the cylindrical portion 112. And the temporary fixing of the grommet 1 is performed so that the wide protrusion 131 may be located in the position where load is most applied by the bending of the wire harness WH at the time of wiring.

  As described above, according to the grommet 1 of the first embodiment described with reference to FIGS. 1 to 11, the three temporary fixing protrusions 130 are spaced from each other in the circumferential direction from the outer peripheral surface 112 a of the second cylindrical portion 112. Open and protrude. For this reason, when the temporary fixing protrusion 130 gets over the edge of the through hole P1 of the panel P and is locked to the edge, each temporary fixing protrusion 130 can individually get over the edge. Thereby, the resistance at the time of pushing in the 2nd cylinder part 112 of the grommet 1 in the through-hole P1 of the panel P at the time of temporary fixing is reduced. Moreover, according to the grommet 1 of 1st Embodiment, about each temporary fix | protrusion protrusion 130, it is not necessary to suppress the width | variety to the inner periphery of the through-hole P1, and sufficient temporary fix | stop is performed, The grommet 1 can be prevented from coming off from the through hole P1. Thus, according to the grommet 1 of 1st Embodiment, while being able to fix temporarily to the through-hole P1 of the panel P, the disconnection from the through-hole P1 during wiring harness wiring can be suppressed.

  Further, according to the grommet 1 of the first embodiment, one temporary fixing protrusion of the three temporary fixing protrusions 130 is closer to the circumferential direction of the second cylindrical portion 112 than the other temporary fixing protrusions. The wide protrusion 131 is formed to be wide. Thereby, the operation | movement which arrange | positions this wide protrusion 131 in the position where a load is easy to apply at the time of wiring harness WH is arranged, and the disengagement of grommet 1 from through-hole P1 during wiring harness WH is suppressed. Is possible.

  Further, according to the grommet 1 of the first embodiment, the distance between the three temporary fixing protrusions 130 and the flange 120 is wider than the thickness of the panel P. For this reason, the extra force which presses the collar part 120 when the temporary fixing protrusion 130 gets over the edge of the through-hole P1 of the panel P is unnecessary, and the grommet 1 can be temporarily fixed more easily.

  Moreover, according to the grommet 1 of 1st Embodiment, the groove | channel 112b by which the inner peripheral edge 22a of the bracket side through-hole 22 in the bracket 2 is fitted in the outer peripheral surface 112a of the 2nd cylinder part 112 of the grommet 1 is provided. . Thereby, temporary fixing to the panel P in the state which attached this bracket 2 to the grommet 1 is attained. As a result, according to the grommet 1 of 1st Embodiment, the effort at the time of fixing to the panel P of the collar part 120 of the grommet 1 will also be suppressed.

  Further, according to the grommet 1 of the first embodiment, the grommet 1 is provided with the anti-rotation protrusion 120c, and the bracket 2 is provided with the anti-rotation recess 24 into which the anti-rotation protrusion 120c is fitted. Thereby, temporary attachment to panel P in the state where bracket 2 was attached is performed in the state where bracket 2 was stopped. As a result, according to the grommet 1 of the first embodiment, troubles such as alignment of the bracket 2 when fixing the flange 120 of the grommet 1 to the panel P can be suppressed.

  Next, the grommet of 2nd Embodiment of this invention is demonstrated with reference to FIG. 12, FIG. In the second embodiment, the shape of the grommet is different from that of the first embodiment. On the other hand, the combination structure of the grommet and the bracket and the temporary fixing structure of the grommet to the panel are substantially the same as in the first embodiment. Therefore, in the following, the second embodiment will be described mainly focusing on the shape of the grommet.

  FIG. 12 is a perspective view showing a state in which the grommet according to the second embodiment and the bracket used for fixing the grommet to the panel of the vehicle body are combined. Also in the second embodiment, as in the first embodiment described above, the bracket 4 is fixed to the panel P by two screw holes 41 and screws (not shown) that pass through the two screw holes P2 of the panel P of the vehicle body. . At this time, the bracket 4 presses the grommet 3 fitted in the through hole P1 in the fitting direction A against the panel P.

  FIG. 13 is a three-view diagram illustrating a side surface of the grommet, a rear surface viewed from the rear in the fitting direction into the through hole of the panel, and a front surface viewed from the front in the fitting direction. 13 (a) shows a rear view of the grommet 3, FIG. 13 (b) shows a side view of the grommet 3, and FIG. 13 (c) shows a front view of the grommet 3. The figure is shown.

  As shown in these drawings, the grommet 3 in the second embodiment also has a first cylindrical portion 311 and a second cylindrical portion 312, similarly to the grommet 1 in the first embodiment. Both are connected by a flexible portion 313. The wire harness WH is inserted through the first tube portion 311, and the second tube portion 312 is fitted into the through hole P <b> 1 of the panel P in the fitting direction A. Moreover, the 1st cylinder part 311 can move with the wire harness WH by the connection in the flexible part 313. FIG. Thereby, the improvement in the freedom degree in wiring of the wire harness WH is achieved.

  In the grommet 3 in the second embodiment, similarly to the grommet 1 in the first embodiment, the flange 320 for fixing to the panel P extends from the outer peripheral surface 312 a of the second cylindrical portion 312. . The grommet 3 also includes three temporary fixing protrusions 330. The grommet 1 is temporarily fixed to the panel P by the locking of the three temporary fixing protrusions 330 to the edge of the through hole P1 of the panel P.

  Here, in the present embodiment, when the wire harness WH is routed, the first tube portion 311 and the wire harness WH are bent over the side wall of the second tube portion 312 as shown in FIG. It is assumed that In response to this assumption, a recess 312b is provided on the rear side in the fitting direction A of the second cylindrical portion 312 as shown in FIG. The first cylindrical portion 311 bent as shown in FIG. 12 is received in the recess 312b. Similarly, a notch 312c for receiving the bent wire harness WH is provided on the front side in the fitting direction A of the second cylindrical portion 312.

  The three temporary fixing projections 330 are arranged along the circumferential direction of the second cylindrical portion 312 and the one wide protruding portion 331 having a relatively large width dimension along the circumferential direction of the second cylindrical portion 312. It consists of two narrow protrusions 332 having a relatively small width dimension. In the present embodiment, one wide protrusion 331 is disposed at a position closest to the recess 312b while facing the notch 312c with the central axis of the first cylindrical portion 311 interposed therebetween. This is because, when the wire harness WH is routed, when the first cylindrical portion 311 and the wire harness WH are bent as described above, the load is most applied to the position.

  The grommet 3 of the second embodiment described above can be easily temporarily fixed to the through hole P1 of the panel P as well as the grommet 1 of the first embodiment, and from the through hole P1 during the wiring of the wire harness WH. Needless to say, it is possible to suppress detachment.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

  For example, in the above-described embodiments, specific shapes are exemplified as examples of the grommet and the bracket according to the present invention. However, the grommets and brackets referred to in the present invention are not limited to these specific shapes, and various shapes are conceivable. For example, in the above-described embodiment, the bracket has a fastening structure with the protector of the wire harness, but the bracket according to the present invention may not have such a fastening structure.

  Further, for example, in the above-described embodiment, three are exemplified as the number of the temporary fixing protrusions referred to in the present invention. However, the number of temporary fixing protrusions referred to in the present invention may be two, or four or more. Further, the number of wide temporary fixing protrusions is not limited to one as in the above-described embodiment, and may be plural.

1, 3 Grommet 2, 4 Bracket 22 Bracket side through hole (second through hole)
22a Inner peripheral edge 24 Anti-rotation recess 111,311 1st cylinder part 111a Wire harness insertion hole 112,312 2nd cylinder part 112a, 312a Outer peripheral surface 112b Groove 120,320 ridge part 120c Anti-rotation protrusion 130,330 Temporary engagement protrusion Part 131,331 Wide protrusion 132,332 Narrow protrusion

Claims (3)

In the grommet that is interposed between the through hole provided in the predetermined panel and the wire harness that passes through the through hole and is fixed to the panel,
A cylindrical portion that is formed into a cylindrical shape with an elastic body, and is fitted into the through-hole toward a predetermined fitting direction;
A flange that extends from the outer peripheral surface of the cylindrical portion into a bowl shape larger than the diameter of the through hole, and can be in close contact with the panel;
A plurality of protrusions that protrude from the outer peripheral surface of the cylindrical portion at a distance from each other in the circumferential direction on the front side in the fitting direction with respect to the flange portion, and are locked to the edge of the through hole A plurality of temporary fixing protrusions for temporarily fixing the cylindrical portion to the panel ;
The flange is fixed to the panel by being sandwiched between the panel by a plate-like bracket having a smaller diameter than the outer diameter of the flange and provided with a second through-hole through which the cylindrical portion passes. And
On the outer peripheral surface of the cylindrical portion, a groove into which the inner peripheral edge of the second through hole is fitted is provided on the rear side in the fitting direction with respect to the flange portion,
From the outer peripheral edge of the collar portion, a rotation projection for preventing rotation of the bracket with respect to the cylindrical portion protrudes,
A grommet in which a rotation-recessing recess into which the rotation-retention protrusion is fitted is provided on a surface of the bracket on the panel side .   The at least one temporary fixing protrusion among the plurality of temporary fixing protrusions is formed wider in the circumferential direction of the cylindrical portion than the other temporary fixing protrusions. Grommet.   The grommet according to claim 1 or 2, wherein a distance between the plurality of temporary fixing protrusions and the flange is wider than a thickness of the panel.

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