JP5385678B2 - Grommet - Google Patents

Description

  The present invention relates to a grommet in which a harness penetrating portion can be bent in accordance with a wiring direction of a wire harness such as a vehicle.

  A grommet that holds the harness penetration portion in a bent state according to the wiring direction of the wire harness is proposed in Patent Document 1. As shown in FIG. 6, the grommet 20 has enlarged diameter portions 22, 22 formed at both ends of the reduced diameter portion 21. The enlarged diameter portions 22, 22 at both ends are fixed to the vehicle body panels 23 a, 23 b, respectively. Thus, the wire harness 25 inserted through the panel 23a is inserted through the reduced diameter portion 21 and the panel 23b. In this grommet 20, the reduced diameter portion 21 is bent with respect to the one enlarged diameter portion 22 in accordance with the wiring direction of the wire harness 25, and the reduced diameter portion 21 is attached to the expanded diameter portion 22 with a band (holding tool) 24. The bent state is maintained by fixing by.

  Further, in the grommet 30 proposed in Patent Document 2, as shown in FIG. 7A, a fixing member 32 is integrally formed on the base 31 of the grommet 30, and the locking member 33 of the fixing member 32 is wired. By engaging with the striated focusing part 34, the striated focusing part 34 is bent and held in accordance with the wiring direction of the wire harness. Further, as shown in FIG. 7B, the linear member converging part 34 is bent by engaging the fixing member 35 provided integrally with the linear member converging part 34 with the engaging member 36 provided on the base 31.・ It is held.

  Further, in the grommet 40 proposed in Patent Document 3, the pipe piece section 41 is obtained by locking the holding means 42 provided integrally with the pipe piece section 41 in the locking hole of the panel 43 as shown in FIG. Is bent and held.

  In addition, the grommet 50 proposed in Patent Document 4 has a locking piece 52 formed integrally with the insertion tube portion 51 of the grommet 50 as shown in FIGS. 9 (a) and 9 (b). The bellows portion 8 is bent and held by being locked to a locking protrusion 54 provided on 53.

  As described above, in Patent Documents 1 to 4, the harness penetration portion through which the wire harness is inserted is bent and held in accordance with the wiring direction of the wire harness.

JP-A-7-282667 Japanese Utility Model Publication No. 64-20612 JP 2000-134769 A Japanese Patent Laid-Open No. 8-106831

  However, since the grommet 20 disclosed in Patent Document 1 uses a band (holding tool) 24 which is a separate member, there is a problem that the number of parts increases and the manufacturing cost increases.

  In addition, the grommet 30 disclosed in Patent Document 2 (see FIG. 7A) needs to pass the striated body converging portion 34 through the locking member 33 in order to fix the bending direction. In the case where the bending direction is fixed after the body is inserted, there is a problem that the work efficiency is poor because the linear member must be passed through the locking member 33. Especially when the striate body is long, the threading operation becomes difficult. Furthermore, when there are parts larger than the wire body, such as a connector, in the wire body, it is necessary to expand the lock part in order to pass the lock part, and the lock part may be damaged. is there. Further, when releasing the fixation in the bending direction, it cannot be easily released because there is an operation of passing the filament through the locking portion. In the grommet 30 shown in FIG. 7B in Patent Document 2, the strength is weak because it is only hooked on the locking member 36, and there is a possibility that the vehicle will be damaged if vibration or inadvertent force is applied.

  Furthermore, since the grommet 40 disclosed in Patent Document 3 is worn by vibrations of the vehicle and the like because the holding means 42 is locked to the body 43 which is a separate member, the grommet 40 is securely fixed in the bending direction when damaged. There is a risk that it will not be possible.

  The grommet 50 disclosed in Patent Document 4 is low in strength because it only hooks the locking piece 52 onto the locking projection 54, and the locking projection 54 is damaged when a vehicle vibration or an inadvertent force is applied. There is a risk.

  Therefore, the present invention aims to provide a grommet that is low in cost, has high efficiency in bending work in the wiring direction of the wire harness, and can firmly hold the bent state in the wiring direction of the wire harness. .

  The grommet according to the first aspect of the present invention includes a base portion that is fixed to a drawing surface of the wire harness and has an insertion hole through which the wire harness is inserted, and a base portion that is integrally extended from an opening peripheral edge of the insertion hole of the base portion. A grommet provided with a flexible cylindrical portion through which a wire harness that has been inserted through a hole is inserted and pulled out, provided on one of the cylindrical portion and the base, and on the other And having a receiving portion that holds the bent portion of the cylindrical portion by receiving the elastic force of the cylindrical portion by surface contact with the protruding portion fitted in a state where the cylindrical portion is bent. .

  A grommet according to a second aspect of the present invention is the grommet according to the first aspect, wherein the protruding portion protrudes from one of the cylindrical portion and the base portion, and the protruding wall of the protruding wall. It is formed of a plate-like engagement wall integrally formed on the distal end side so as to intersect with the protruding wall, and the receiving portion is provided on either the cylindrical portion or the base portion, and the engagement wall is on the inner side. A hood portion having an engagement opening that can be fitted to the hood portion, and a slit that is provided in the hood portion and through which the protruding wall is inserted when the engagement wall is fitted to the hood portion. The engagement wall is in contact with the inner surface of the inner wall of the hood portion by surface contact in the fitted state of the engagement wall.

  A grommet according to a third aspect of the present invention is the grommet according to the first or second aspect, wherein the protrusion is provided with an engaging protrusion that engages with the receiving portion in a fitted state with the receiving portion. The receiving portion is provided with an engaging groove with which the engaging protrusion engages.

  A grommet according to a fourth aspect of the present invention is the grommet according to any one of the first to third aspects, wherein the protruding portion is provided on the cylindrical portion, and the receiving portion is provided on the base portion. The base portion is formed of an elliptical flat wall, the receiving portions are provided at a plurality of locations on the outer peripheral edge of the flat wall, and the projection portions are provided at a plurality of locations on the cylindrical portion corresponding to the receiving portions at a plurality of locations. It is characterized by being.

  In the grommet of the first aspect of the invention, the bent portion of the tubular portion can be held by bending the tubular portion in accordance with the wiring direction of the wire harness and fitting the protruding portion to the receiving portion. According to the first aspect of the present invention, since the protruding portion and the receiving portion are provided on the cylindrical portion and the base portion, the bent state of the cylindrical portion is not maintained by another member, so the number of parts is reduced and the cost is reduced. Can be realized. Moreover, since only the protrusion is fitted to the receiving part, the bending work of the cylindrical part can be easily performed, and the efficiency of the bending work can be improved. Furthermore, since the receiving part receives the elastic force of the cylindrical part by surface contact, the bent state of the cylindrical part can be firmly held by the fitting of the protruding part and the receiving part.

  In the grommet according to the second aspect of the present invention, the engagement wall of the projection portion is fitted into the engagement opening of the hood portion, and the engagement wall is brought into surface contact with the inner surface of the inner wall of the hood portion by inserting the projection wall into the slit. Since it abuts, even if a force is exerted on the cylindrical portion to return to its original shape due to the elastic force of the cylindrical portion, the force is received by the surface, so that the bent state of the cylindrical portion can be firmly held.

  In the grommet according to the third aspect of the invention, since the engaging protrusion engages with the engaging groove of the receiving portion in a state where the protruding portion is fitted to the receiving portion, the protruding portion may be inadvertently detached from the receiving portion. In addition, the bent state of the cylindrical portion can be held more firmly.

  In the grommet of the invention according to claim 4, by providing a plurality of receiving portions at the outer peripheral end of the base portion, the bending direction of the cylindrical portion can be selected, and it can correspond to the wiring directions of a plurality of types of wire harnesses. Can be improved. Further, by providing the protrusions at a plurality of locations corresponding to the plurality of receiving portions, the cylindrical portion can be bent without being twisted.

It is a perspective view which shows embodiment of the grommet which concerns on this invention. It is the expansion perspective view which expanded the projection part of the grommet. It is the expansion perspective view which expanded the receiving part of the grommet. It is a perspective view which shows the state which bends the cylindrical part of a grommet and tries to make a projection part fit in a receiving part. It is a perspective view which shows the state which bent the cylindrical part of the grommet and fitted the projection part to the receiving part. It is a front view which shows the grommet of a prior art example. The grommet of a prior art example is shown, (a) is sectional drawing which shows the example in which the fixing | fixed part was integrally formed in the base, (b) It is sectional drawing which shows the example in which the fixing | fixed part was integrally formed in the linear body focusing part. It is sectional drawing which shows the grommet of a prior art example. The grommet of a prior art example is shown, (a) is a partial cross-sectional view showing a state where the communication pipe part is not bent, and (b) is a side view showing a state where the communication pipe part is bent.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the grommet 1 according to the present invention is formed of a rubber material, and includes a base portion 2 and a cylindrical portion 3 formed integrally with the base portion 2. The base 2 has an elliptical plate shape, and one surface side is a mounting surface 4 in close contact with a wire harness lead surface (not shown) in which a harness lead hole (not shown) of the panel is formed. A cylindrical portion 3 is formed on the wire harness drawing side. Further, an insertion hole 5 through which the wire harness is inserted is formed in the central portion of the base portion 2. From the opening peripheral edge 6 of the insertion hole 5, the cylindrical portion 3 extends in a direction substantially perpendicular to the base portion 2.

  And the wire harness which penetrated the penetration hole 5 penetrates the inside of the cylindrical part 3, and is pulled out from the opening 3a by the side of a free end. Moreover, the cylindrical part 3 has flexibility, and can be bent according to the wiring direction of a wire harness. Further, in the grommet 1 of the present embodiment, a protruding portion 7 that protrudes from the outer periphery of the cylindrical portion 3 and a receiving portion 8 that is provided at an outer peripheral end on one side in the longitudinal direction of the base portion 2 are integrally formed. ing.

  As shown in FIG. 2, the projecting portion 7 is integrally formed so as to intersect with the projecting wall 9 at the tip side of the projecting wall 9 and a plate-shaped projecting wall 9 projecting from the outer periphery of the cylindrical portion 3. It is formed with the rectangular-plate-shaped engagement wall 10 made. A surface (rear surface side) of the engaging wall 10 on the protruding wall 9 side is an abutting surface 11 that abuts against the inner wall of the hood portion 16. In addition, an engagement protrusion 12 is formed on the lower end portion on the base portion 2 side on the front surface side (front surface side) of the engagement wall 10. The protruding portion 7 is fitted to a receiving portion 8 provided on the base portion 2 with the tubular portion 3 being bent.

  The receiving portion 8 includes both side walls 13 and 13 rising from the base portion 2 and receiving walls 14 that connect the both side walls 13 and 13, and opens toward the outer peripheral side of the base portion 2. The engaging wall 10 is fitted inside. A hood portion 16 having a mating engagement opening 15 and a slit 18 provided on the receiving wall 14 of the hood portion 16 and through which the protruding wall 9 is inserted when the engagement wall 10 is fitted to the hood portion 16. Is formed. The receiving portion 8 is provided with an engaging groove 19 in the base portion 2 on the back side of the hood portion 16. The engaging ridge 12 provided on the engaging wall 10 engages with the engaging groove 19 in a state where the protruding portion 7 is fitted to the receiving portion 8. Further, the contact surface 11 of the engagement wall 10 contacts the inner surface side of the receiving wall 14 on both sides of the slit 18 of the hood portion 16.

  Next, a procedure for bending the tubular portion 3 of the grommet 1 in accordance with the wiring direction of the wire harness and maintaining this bent state will be described.

  A wire harness is inserted through the grommet 1 in the state shown in FIG. 1, and the attachment surface 4 is attached to a harness lead-out surface such as a panel. Next, as shown in FIG. 4, the cylindrical part 3 is bent toward the wiring direction of the wire harness. In the example shown in FIG. 4, the base 2 is bent toward one side in the longitudinal direction. At this time, the engaging wall 10 is positioned on the outer peripheral side of the hood portion 16 so as to extend the tubular portion 3 with respect to the base portion 2. From this state, as shown in FIG. 5, the engaging wall 10 is inserted into the engaging opening 15 of the hood portion 16 and the protruding wall 9 is inserted into the slit 18. Further, the engaging wall 10 is inserted into the hood portion 16 and the engaging protrusion 12 is engaged with the engaging groove 19.

  In this state, the abutting surface 11 on the back surface side of the engaging wall 10 abuts on the inner surface side of the receiving wall 14 of the hood portion 16 by surface contact, so that the cylindrical portion 3 is kept bent.

  Thus, according to the grommet 1 of this embodiment, since the projection part 7 and the receiving part 8 are integrally provided in the cylindrical part 3 and the base part 2, the bending state of the cylindrical part 3 is hold | maintained by another member. Therefore, the number of parts can be reduced and the cost can be reduced.

  Further, since only the projection 7 is fitted to the receiving portion 8, the bending operation of the cylindrical portion 3 can be easily performed, and the efficiency of the bending operation can be improved.

  Further, since the receiving portion 8 receives the elastic force of the cylindrical portion 3 by the surface contact of the contact surface 11 of the engaging wall 10 by the receiving wall 14 in the hood portion 16, the protrusion 7 and the receiving portion 8 are fitted. Thus, the bent state of the cylindrical portion 3 can be firmly held.

  In addition, since the engaging protrusion 12 engages with the engaging groove 19 of the receiving portion 8 in a state where the protruding portion 7 is fitted to the receiving portion 8, the protruding portion 7 may be inadvertently detached from the receiving portion 8. In addition, the bent state of the cylindrical portion 3 can be held more firmly.

  The present invention is not limited to the embodiment described above, and various modifications can be made. For example, in the grommet of this embodiment, the protruding portion 7 is formed on the cylindrical portion 3 and the receiving portion 8 is formed on the base portion 2, but the receiving portion is formed on the cylindrical portion 3 and the protruding portion is provided on the base portion. Also good. Further, in the present embodiment, an example in which the receiving portion 8 is provided at one place of the base portion 2 has been shown. By providing the projections 7 corresponding to 8, the bending direction of the tubular part 3 can be selected, and the versatility can be improved by adapting to the wiring directions of a plurality of types of wire harnesses. In this case, “corresponding to the receiving portion 8” means that when the tubular portion 3 is bent, the receiving portion 8 on the outer peripheral side of the base portion 2 is bent while the tubular portion 3 is twisted. This means that the protruding portion 7 is provided on the cylindrical portion 3 so as not to exist.

  In the above embodiment, an example in which the contact surface 11 and the surface of the receiving wall 14 in the hood portion 16 are planar is shown, but at least one of the contact surface 11 or the receiving wall 14 in the hood portion 16 is shown. The surface may have an uneven shape, for example, a shape in which a plurality of small protrusions are formed. In this case, even if the surfaces of the contact surface 11 and the receiving wall 14 are uneven, the contact surface 11 and the receiving wall 14 are pressure-bonded by the elastic force of the cylindrical portion 3, so that the uneven portion such as a small protrusion is deformed. As a result, the contact surface 11 and the receiving wall 14 are in surface contact. Further, by forming at least one surface of the abutment surface 11 and the receiving wall 14 into a concavo-convex shape, the frictional resistance is increased and it becomes difficult to slip, so that the engagement wall 10 from the inside of the hood portion 16 is difficult to come off and the hood The effect that the engaging wall 10 can be reliably held in the portion 16 is obtained.

DESCRIPTION OF SYMBOLS 1 Grommet 2 Base part 3 Cylindrical part 4 Mounting surface 5 Insertion hole 6 Opening periphery 7 Protrusion part 8 Receiving part

Claims (4)

A base portion that is fixed to the drawing surface of the wire harness and has an insertion hole through which the wire harness is inserted, and a wire harness that extends integrally from the opening periphery of the insertion hole of the base portion and passes through the insertion hole are inserted. A grommet having a flexible tubular portion to be pulled out,
The protruding portion provided on one of the cylindrical portion and the base portion and the protruding portion provided on the other side in a state where the cylindrical portion is bent and the elastic force of the cylindrical portion is brought into surface contact. And a receiving part for holding the bent state of the cylindrical part. The grommet according to claim 1,
The projecting portion includes a plate-like projecting wall projecting from either the tubular portion or the base portion, and a plate-like engagement integrally formed on the tip side of the projecting wall so as to intersect the projecting wall. Formed with joint walls,
The receiving portion is provided on the other of the cylindrical portion and the base portion, and a hood portion having an engagement opening into which the engagement wall can be fitted inside, and the hood portion provided to the hood portion. Formed with a slit through which the protruding wall is inserted when the engaging wall is fitted.
The grommet according to claim 1, wherein the engagement wall is brought into contact with the inner surface of the inner wall of the hood portion by surface contact when the engagement wall is fitted into the hood portion. A grommet according to claim 1 or claim 2, wherein
The protrusion is provided with an engaging ridge that engages with the receiving portion when fitted to the receiving portion, and the receiving portion is provided with an engaging groove that engages with the engaging ridge. Grommet characterized by that. A grommet according to any one of claims 1 to 3,
The protruding portion is provided on the cylindrical portion, the receiving portion is provided on the base portion, the base portion is formed by an elliptical flat wall, and the receiving portions are provided at a plurality of outer peripheral ends of the flat wall. , grommet, wherein the benzalkonium the protrusion is provided a plurality of locations on the tubular portion so as to correspond to the receiving portion of the plurality of positions.

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