JP5108621B2 - Grommet - Google Patents

Description

  The present invention relates to a grommet provided in a wire harness that electrically connects between a stationary member and a movable member provided to be movable with respect to the stationary member.

  2. Description of the Related Art Conventionally, in order to protect a wire harness that electrically connects a door panel and a door of a vehicle or the like, for example, a grommet having a structure that can be bent while the wire harness is inserted inside has been used. As such grommets, for example, the following are known.

  That is, the grommet disclosed in the following Patent Document 1 includes an elastic grommet body through which a wire harness bundled with electric wires is inserted, and a holding member provided on the outer periphery of a longitudinal intermediate portion of the grommet body. A waterproof grommet in which a member is fixed to the mounting side. This waterproof grommet is configured such that the grommet body has a cylindrical portion at the middle portion in the longitudinal direction of the bellows portion (bellows-like cylindrical portion), and a holding member is attached to the cylindrical portion.

  The holding member includes an annular portion that can be opened and closed and locked, and a holding portion provided on the annular portion. The cylindrical portion described above is provided with a protrusion, and an engaging portion for the protrusion is provided on the annular portion. Has a structure. A pair of protrusions are arranged facing each other, a left / right identification mark is provided at or near the pair of protrusions, and a direction indicating mark indicating one of the left / right identification marks is provided on the annular part. Further, a plurality of protrusions for preventing crushing and confirming the position are provided on the bellows part on the same straight line as the protrusions.

JP 2004-187426 A

  However, in the grommet disclosed in Patent Document 1, the intermediate portion in the longitudinal direction of the grommet main body is securely fixed to the fixed side member via the holding member, and pinching caused by the movement of the movable side member or the wire harness electric wire. Although it is said that disconnection is prevented, the structure becomes complicated because the hinge structure is adopted for the holding member attached to this cylindrical part after forming the cylindrical part in the longitudinal direction middle part of the grommet body. It is difficult to reduce costs and mold costs, and there is a problem that it is difficult to reduce costs.

  The present invention has been made in view of such problems, and simplifies the structure of the holding member of the grommet, and suppresses material costs and mold costs to prevent pinching and wire breakage of the wire harness. An object is to provide a grommet that can be used.

  A grommet according to the present invention is a grommet provided in a wire harness that electrically connects between a fixed side member and a movable side member provided so as to be movable with respect to the fixed side member. A pair of cylindrical fixed portions that are respectively fixedly attached to the fixed side member and the movable side member, and a connecting portion between the fixed portions so as to be bendable, and a peak portion and a valley portion formed along the connecting direction. A continuous bellows-shaped cylindrical portion, and a holding member for fixing and holding the bellows-shaped cylindrical portion to either the fixed-side member or the movable-side member, and at least a part of the bellows-shaped cylindrical portion A U-shaped holding member insertion portion having an opening in the tangential direction of the outer peripheral surface intersecting the connection direction is formed on the outer peripheral surface, and the holding member is inserted and fixed in the opening of the holding member insertion portion. Having an insertion piece And butterflies.

  By configuring the grommet according to the present invention as described above, it is possible to simplify the structure of the holding member of the grommet, to suppress the material cost and the mold cost, and to prevent the pin from being inserted at a low cost and the wire harness of the wire harness to be prevented. it can.

  A part of the holding member includes an insertion piece portion to be inserted into the holding member insertion portion, and a locking protrusion to be engaged with a peripheral portion of the opening when the insertion piece portion is inserted into the holding member insertion portion. A portion is formed.

  For example, the holding member may be attached by attaching a clip-like attachment piece to a support member attached to at least one of the fixed side member and the movable side member.

  In addition, the holding member has, for example, the insertion piece portion formed in a curved shape along the outer peripheral surface of the bellows-like cylindrical portion, and a central axis of the insertion piece portion and the bellows-like cylinder portion when inserted. A presser piece portion formed so as to press the outer peripheral surface on the opposite side through the insertion piece portion, and the contact position of the insert piece portion and the presser piece portion with the outer peripheral surface is a straight line connecting the contact positions. The base may be set at a position beyond the central axis with the base end of the insertion piece as a base point.

  For example, the fixed member is a vehicle panel member, the movable member is a door member of the vehicle, and the support member is a link member that connects the panel member and the door member.

  ADVANTAGE OF THE INVENTION According to this invention, the structure of the holding member of a grommet can be simplified, the grommet which can aim at prevention of the pinching of the wire harness of a wire harness and a disconnection at low cost by suppressing material cost and metal mold | die cost can be provided.

  Hereinafter, preferred embodiments of a grommet according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing an example of the overall configuration of a grommet according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram for explaining an example of an actual use state of the grommet.

  As shown in FIGS. 1 and 2, the grommet 10 includes a grommet main body 11 and a protector 20 that is a holding member. The grommet body 11 is made of, for example, EPDM (ethylene / propylene / diene rubber) or an elastomer, and the protector 20 is made of PP (polypropylene).

  The grommet 10 is for protecting a wire harness (not shown) having a structure in which, for example, a plurality of electric wires passing between a vehicle body and a door are bundled. As shown in FIG. 2, the grommet main body 11 is opened and closed via a hinged link portion 2 with respect to the panel member 1 on the other end side and the fixed side pedestal portion 12 attached to the panel member 1 on the vehicle body side at one end side. And a movable side pedestal portion 13 attached to the movable side door member 3 that is movably provided.

  The grommet body 11 includes, for example, a cylindrical fixed portion 14 formed with a predetermined length continuous from the fixed side pedestal portion 12 and a cylinder formed with a predetermined length continuous from the movable side pedestal portion 13. And a bellows-like cylindrical portion 18 composed of a continuation of a crest 16 and a trough 17 formed along the connecting direction. Yes.

  In the grommet 10 of this example, for example, a peak portion 16 and a trough portion 17 are provided in a part of the bellows-shaped cylindrical portion 18 of the grommet main body portion 11 (for example, a position closer to the fixing portion 15 than a position near the middle). Instead, a cylindrical portion 19 having an inner diameter equivalent to the inner diameter of the fixing portions 14 and 15 and the minimum inner diameter of the bellows-shaped cylindrical portion 18 is formed over a predetermined range.

  That is, the grommet 10 is configured such that a portion corresponding to the bellows-shaped cylindrical portion 18 in the grommet main body portion 11 is bendable, and a portion corresponding to the cylindrical portion 19 is not bent. For this reason, in the grommet 10 of this example, the place which wants to be bent and the place which does not want to be bent can be set arbitrarily, and if the cylindrical part 19 is not provided, all the bellows-like cylindrical parts 18 will be comprised freely. be able to.

  Further, the fixed side pedestal portion 12 and the movable side pedestal portion 13 are inserted into fixing through holes (not shown) formed in the panel member 1 and the door member 3, respectively, and are caught by the peripheral portions of these two pedestal portions. Insertion guide portions 12a and 13a (see FIG. 1) for locking 12 and 13 are formed. Thereby, the wire harness passes, for example, from the panel member 1 through the fixed side pedestal portion 12, through the fixed portion 14, the bellows-like cylindrical portion 18 and the cylindrical portion 19, and further through the fixed portion 15 and the movable side pedestal portion 13. The door member 3 is electrically connected to the vehicle body side and the movable side.

  Furthermore, in the grommet 10 of the present example, for example, another part of the bellows-like tube portion 18 of the grommet main body 11 (for example, the middle vicinity position of the bellows-like tube portion 18 closer to the fixed portion 14 than the middle vicinity position). A U-shape having an opening in the tangential direction (direction indicated by an arrow in FIG. 1) of the outer peripheral surface intersecting the connecting direction on the outer peripheral surface, and a pair of parallel side walls 31 standing on the outer peripheral surface The protector insertion locking portion 30 is formed.

  On the other hand, the protector 20 is inserted into the clip-shaped attachment piece portion 22 having a pair of locking pieces 21 that are hooked and locked at both ends in the width direction of the hinge link portion 2, and the protector insertion locking portion 30. One piece 23 is provided. Further, the protector 20 of the present example includes a locking projection 24 that is hooked and locked to the peripheral edge of the opening on the distal side in the insertion direction when, for example, the insertion piece 23 is completely inserted into the protector insertion locking portion 30. , And a position restricting piece 25 that abuts the peripheral edge on the opposite side and the peripheral edge on which the locking protrusion 24 is locked.

  With such a structure, the protector 20 is regulated in position by the locking projection 24 and the position restricting piece 25 in the insertion direction of the insertion piece 23, and the pair of protector insertion locking parts 30 in the connecting direction. The position is regulated by the inner surface of the side wall 31 and both side surfaces 23a of the insertion piece 23 in the width direction.

  And in the grommet 10 comprised in this way, the protector insertion latching | locking part 30 and the protector 20 are provided in the location which restrict | limits the direction of the bending | flexion operation | movement of the bellows-shaped cylinder part 18 arbitrarily, This grommet main-body part 11 is provided with this protector 20. If it attaches to the hinge link part 2 after attaching to, the pinching of the grommet 10 accompanying the opening / closing operation | movement of the door member 3 can be avoided easily, and the disconnection prevention of a wire harness can be aimed at effectively.

  Moreover, in this grommet 10, the protector insertion locking part 30 provided in the grommet main body part 11 can be integrally formed with the grommet main body part 11 with a simple U-shape, and the shape of the protector 20 is also complicated. Since it is possible to eliminate the need for protruding protrusions and one piece for regulation, material costs can be reduced, molds can be manufactured at low cost, and cost can be reduced while maintaining the effect of preventing disconnection. It becomes possible.

  For example, the cylindrical portion 19 is eliminated in the grommet main body portion 11 and the insertion piece portion is formed by the locking protrusion 24 and the back wall of the one locking piece 21 without providing the position restricting piece portion 25 described above in the protector 20. If the position restriction in the insertion direction of 23 is performed, the grommet 10 can be manufactured at a lower cost. Further, it is possible to reduce the cost by configuring the insertion piece portion 23 inserted by only the elastic force of the protector insertion locking portion 30 while the locking projection 24 is omitted.

  FIG. 3 is a perspective view showing an example of the overall configuration of another grommet according to an embodiment of the present invention, and FIG. 4 is a partial cross-sectional view for explaining an example of an actual use state of the grommet. In the following description, parts that are the same as those already described may be denoted by the same reference numerals and description thereof may be omitted, and parts not particularly relevant to the present invention will not be specified.

  As shown in FIGS. 3 and 4, the grommet 10A is similar to the grommet 10 of the previous example in that the grommet 10A includes the grommet main body 11 and the protector 40 as a holding member. The point in which the stop part 30 is formed is different and the structure of the protector 40 is different from the grommet 10 in the previous example.

  That is, the protector insertion locking portion 30 is formed in a state where it is moved by 90 ° along the outer peripheral direction of the bellows-like cylindrical portion 18 as compared with the grommet 10 of the previous example. Further, in the protector 40, the insertion piece portion 43 is formed in a curved shape along the outer peripheral surface of the bellows-like cylindrical portion 18, and the insertion piece portion 43 is provided in the protector insertion locking portion 30 in the direction indicated by the arrow in FIG. When fully inserted, the pressing piece portion 44 is formed so as to press the outer peripheral surface on the opposite side through the insertion piece portion 43 and the central axis P of the bellows-like cylindrical portion 18 (see FIG. 4).

  And the contact position with the outer peripheral surface of the bellows-shaped cylinder part 18 of these insertion piece parts 43 and the holding piece part 44 is the base end part of the insertion piece part 43 in the straight line L (refer FIG. 4) which connects this contact position. It is set at a position beyond the central axis P with reference to 43a. As a result, the bellows-shaped tube portion 18 can be reliably held by the insertion piece portion 43 and the presser piece portion 44. Here, the attachment piece 42 and the presser piece 44 are formed in a straight line.

  In this protector 40, the locking projection 45 of the insertion piece 43 is formed so as to be caught on the peripheral edge of the opening on the distal end side in the insertion direction on the pair of side walls 31. Since the formed locking recess 46 is engaged with the inner peripheral surface of the pair of side walls 31 and the peripheral edge of the opening, the position of the protector 40 is restricted.

  Therefore, even with the grommet 10A configured as described above, it is possible to easily avoid the grommet 10A due to the opening / closing operation of the door member 3 and to effectively prevent the wire harness from being disconnected. It becomes possible to plan. Since the other points are the same as those of the grommet 10 described above, the description thereof is omitted here.

  In the above-described embodiment, the hinge link portion 2 has been described as an example of the member to which the grommets 10 and 10A are attached via the protectors 20 and 40. However, the present invention is not limited to this. 1 or the door member 3 may be attached via the protectors 20 and 40, and the wire that electrically connects between the fixed side member and the movable side member provided to be movable with respect to the fixed side member. Applicable in all cases to protect the harness. Specifically, it can be applied to, for example, an electrical connection between a building material of a building and a door, an electrical connection between a fixed part and a movable part of a vehicle, and the like.

It is a perspective view which shows the example of the whole structure of the grommet which concerns on one Embodiment of this invention. It is explanatory drawing for demonstrating the example of the actual use condition of the grommet. It is a perspective view which shows the example of the whole structure of the other grommet which concerns on one Embodiment of this invention. It is explanatory drawing for demonstrating the example of the actual use condition of the grommet.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Panel member, 2 ... Hinge link part, 3 ... Door member 10, 10A ... Grommet, 11 ... Grommet main-body part, 12 ... Fixed side base part, 12a, 13a ... Insertion guide part, 13 ... Movable side base part, DESCRIPTION OF SYMBOLS 14,15 ... Fixed part, 16 ... Mountain part, 17 ... Valley part, 18 ... Bellows cylindrical part, 19 ... Cylindrical part, 20, 40 ... Protector, 21, 41 ... Locking piece, 22, 42 ... Mounting piece , 23, 43 ... insert piece, 24, 45 ... locking projection, 30 ... protector insertion locking portion, 44 ... presser piece portion, 46 ... locking recess.

Claims (5)

A grommet provided in a wire harness that electrically connects between a fixed side member and a movable side member provided to be movable with respect to the fixed side member,
A pair of cylindrical fixed parts attached and fixed to the fixed side member and the movable side member at both ends, and a peak and a valley formed along the connecting direction by connecting the fixed parts flexibly. A bellows-like cylindrical portion consisting of a continuous portion, and
A holding member for fixing and holding the bellows-like tube portion on either the fixed side member or the movable side member;
At least a portion of an outer surface of the bellows-like cylindrical portion, intersects the connecting direction, so as to form an opening which opens in the tangential direction of the outer peripheral surface, holding member insertion portion of the U-shape is provided ,
The holding member has an insertion piece portion that is inserted into and fixed to the opening of the holding member insertion portion.   2. The grommet according to claim 1, wherein the holding member further includes a locking projection that locks to a peripheral edge of the opening on the distal end side in the insertion direction when the insertion piece is inserted into the opening. . The grommet according to claim 1 or 2, wherein the holding member is attached by attaching a clip-like attachment piece to a support member attached to at least one of the fixed side member and the movable side member. In the holding member, the insertion piece portion is formed in a curved shape along the outer peripheral surface of the bellows-like cylindrical portion, and when inserted, the insertion piece portion is inserted through the central axis of the insertion piece portion and the bellows-like cylinder portion. It has a presser piece formed to press the outer peripheral surface on the opposite side,
The surface parallel to the central axis includes the most distal portion of the contact position with the outer peripheral surface of the insertion piece portion and the contact position with the outer peripheral surface of the presser piece portion, The grommet according to any one of claims 1 to 3, wherein the grommet is set so as to be positioned on a distal end side of the insertion piece portion and the presser piece portion with respect to the central axis with a base end portion as a base point. .   The fixed side member is a panel member of a vehicle, the movable side member is a door member of the vehicle, and the support member is a link member that connects the panel member and the door member. The grommet according to 3 or 4.

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