JP5799937B2 - Grommet and wiring harness wiring structure - Google Patents

Description

  The present invention relates to a technique for routing a wire harness between a body and a door.

  Generally, when a wire harness is routed between a vehicle body and a door, a grommet that protects the wire harness is attached to the wire harness. Such a grommet has a bellows portion in which peaks and troughs are alternately continued along the axial length direction of the grommet. Since the bellows portion expands or contracts according to the opening / closing operation of the door panel, the grommet can be bent following the opening / closing operation of the door panel.

  The grommet of Patent Document 1 is formed with a small pitch of the bellows inside the bend and a large pitch of the bellows outside the bend, thereby improving the flexibility. In the grommets of Patent Documents 2 and 3, the flexibility is improved by making the protruding length of each peak portion of the bellows portion outward in the radial direction varies depending on the portion in the longitudinal direction.

JP 2007-252060 A JP 2011-35971 A Japanese Utility Model Publication No. 5-20952

  However, when the grommets of Patent Documents 1 to 3 are attached to the wire harness between the body and the door, the folds of the bellows portion are conspicuous when the door is opened and the expanded grommet is exposed, and the aesthetics are impaired. There is a problem such as.

  The present invention was made to solve these problems, and in the grommet protecting the wire harness routed between the vehicle body and the door, when the door is opened and the extended grommet is exposed, An object of the present invention is to provide a technique capable of making the folds of the bellows part inconspicuous.

  In order to solve the above-mentioned problem, a grommet according to a first aspect is a grommet that inserts and protects a wire harness routed between a vehicle body and a door connected to the vehicle body, Crests and valleys are alternately provided in the length direction and provided with bellows tube parts having a bellows part that can be expanded and contracted, and provided at both end portions of the bellows cylinder part, respectively, on the vehicle body side and the door side A pair of attachment portions attached to each other, and the bellows portion has a thickness of an inclined portion connecting the mountain portion and the valley portion with each thickness of the adjacent mountain portion and the valley portion being different from each other. Is also thin.

  The grommet which concerns on a 2nd aspect is a grommet which concerns on a 1st aspect, Comprising: In the cross section of the axial length direction of the said bellows part, it is the cross-section of two slope parts adjacent on both sides of a mountain part among the said bellows parts. Contour line of the inner peripheral surface of the mountain portion, with respect to a polygonal line connecting the intersection of the extended lines of each contour line of the inner peripheral surface and each end point on the mountain portion side of the contour line, It is on the outer peripheral surface side of the peak.

  The wire harness routing structure according to the third aspect includes the grommet according to the first or second aspect, the wire harness, and the bellows by the door-side attachment portion of the pair of attachment portions of the grommet. And a protector that accommodates the wire harness drawn out from the grommet to the door side. The protector includes an accommodating portion formed with an accommodating space that is connected to the internal space of the cylindrical portion.

  According to the invention according to any one of the first to third aspects, the accordion portion of the grommet is such that the thicknesses of the adjacent peak portions and the valley portions are the slope portions connecting the peak portions and the valley portions. Since the thickness is smaller than the thickness, the slope portions adjacent to each other with the mountain portion or the valley portion interposed therebetween are opened so that the angle formed by the slope portions becomes larger when the door is opened. Therefore, since the bellows part is more easily extended, the shape of the bellows part can be made flat, and the folds of the bellows part can be made inconspicuous.

  According to the second aspect of the invention, in the cross section of the bellows portion in the axial length direction, each of the contour lines of the inner peripheral surfaces of the two slope portions adjacent to each other with the mountain portion in between the bellows portions. The contour line of the inner peripheral surface of the peak portion is on the outer peripheral surface side of the peak portion with respect to the broken line connecting the intersection of the lines and the respective contour lines. Such an inner peripheral surface of the peak portion is formed by an inner peripheral surface formed to be concaved toward the outer peripheral surface side with respect to the inner peripheral surface of the peak portion when the thickness of the bellows portion is uniform over the entire length. Can be realized. Accordingly, the thickness of the peak portion can be made thinner than the slope portion without providing a local depression or the like on the outer peripheral surface observed from the outside, so that when the door is opened and the bellows portion is extended, the folds of the bellows portion are expanded. It can be less noticeable.

  According to the invention relating to the third aspect, the protector of the wire harness wiring structure portion is an internal space of the bellows cylinder portion by the door side attachment portion of the pair of attachment portions of the grommet according to the first or second aspect. A housing part formed with a housing space connected in communication with the wire harness is housed in the housing space and the wire harness drawn from the grommet to the door side is housed in the housing space. Therefore, in the wire harness wiring structure portion, when the door is opened and the extended grommet is exposed, the fold of the bellows portion can be made inconspicuous.

It is a figure which shows the wire harness wiring structure part of a vehicle attachment state. It is a top view of the wire harness wiring structure part in the open state of a door. It is a side view of the wire harness wiring structure part in the closed state of a door. It is a top view of the wire harness wiring structure part in the closed state of a door. It is sectional drawing along the longitudinal direction (axial length direction) of a grommet. It is the figure which expanded a part of cross section of the bellows part of the grommet of FIG. It is the figure which expanded a part of cross section of the bellows part of the grommet which concerns on a modification. It is a schematic diagram of the cross section of the expanded grommet of embodiment and a comparison technique.

  Hereinafter, the grommet 60 which concerns on embodiment, and the wire harness wiring structure part 10 provided with the grommet 60 are demonstrated (refer FIG. 1). The wire harness routing structure 10 is configured to route the wire harness WH between the vehicle body 2 and the door 6 of the automobile.

  In the wiring harness WH, a plurality of electric wires for supplying power or transmitting signals to electrical devices such as a switch, a power window motor, a door lock motor, a side mirror motor, and a speaker installed in the door 6 are arranged in the routing route. Correspondingly, they are appropriately bundled. Here, the portion of the wire harness WH that extends from the vehicle body 2 to the door 6 is configured by bundling the plurality of electric wires into one. Further, the wire harness WH is branched in the door 6 and connected to various electric devices (not shown).

  For convenience of explanation, the vehicle body 2 and the door 6 will be described. The door 6 is connected to the vehicle body 2 by a door hinge 5 and an opening degree restricting unit 3 so as to be able to open and close the entrance / exit formed in the vehicle body 2. The vehicle body 2 refers to a frame portion formed of a metal member. Here, the door 6 is a front side door, and for convenience of explanation, it is assumed that the door 6 is connected to the vehicle body 2 so as to change its posture around an axis along the vertical direction (the rotation axis of the door hinge 5). In addition, regarding the door 6, regardless of the opening / closing posture, an end portion (an end portion on a connected side) located on the front side of the vehicle in the closed state is referred to as a front end portion, and an end portion located on the rear side is referred to as a rear end portion.

  The opening degree restricting unit 3 (also referred to as a door check link) is a configuration for maintaining the door 6 at a predetermined opening degree (full open posture, half open posture, etc.). More specifically, the opening degree restriction part 3 includes an arm part 3a and a case part 3b. One end of the arm portion 3a is connected to the vehicle body 2 so as to be rotatable relative to the vehicle body 2 (vehicle body side connection portion), and a portion that is thinner than other portions (thin wall in the vertical direction of the vehicle body) is formed at a plurality of longitudinal positions. It is formed in a bar shape. In the drawing, the thickness of the arm portion 3a is omitted. The case portion 3b is formed in a casing shape having a through-hole through which the arm portion 3a can be inserted, and has a not-shown clamping portion that is pressed and urged so as to sandwich the arm portion 3a. That is, the case portion 3b is likely to stay at a position where the sandwiching portion sandwiches the thin portion with respect to the inserted arm portion 3a. The case portion 3 b is fixed to the door 6 and serves as a door side connecting portion of the opening degree restricting portion 3.

  Then, in conjunction with the opening / closing operation of the door 6, the arm portion 3a is relatively inserted and moved with respect to the case portion 3b. In a state where the holding part of the case part 3b is in a position to hold the thin part of the arm part 3a, the posture of the door 6 is maintained unless an external force that can get over the thick part is applied. Generally, the position of the thin portion of the arm portion 3a is set so that the posture can be maintained in the half-open posture and the full-open posture of the door 6. The arm portion 3a enters the door 6 with the closing operation of the door 6, and retreats from the door 6 with the opening operation.

  The door 6 is formed of a door inner panel 7 formed by press molding, punching, or the like of a metal plate, a door outer panel as an exterior member provided outside the door, a synthetic resin material, and the like. It has a trim 8 as an interior member attached to the inside (see FIG. 2). Further, the door 6 is configured such that the wire harness WH can be routed inside and outside through an introduction opening 6h that opens at an introduction side edge that is an edge on the connection side (front end side) with the vehicle body 2. Here, the introduction opening 6 h of the door 6 is formed by an opening edge opening toward the front end side of the door 6 in the recess 7 h formed in the door inner panel 7 and an edge on the front end side of the trim 8. It is an opening. The concave portion 7h is a concave portion that partially or entirely accommodates the protector P to be described later, and opens at the vehicle inner side of the door inner panel 7 and opens at the front end side of the door 6 as described above.

  Further, the vehicle body 2 is formed with a through-hole portion 2h for inserting and routing the wire harness WH inside and outside. The through-hole portion 2h is formed at a portion facing the introduction opening portion 6h in the closed state of the door 6 at the opening edge portion of the entrance / exit in plan view (see FIG. 4). The introduction opening 6h and the through hole 2h are shielded and hidden from the interior of the vehicle by the interior member attached to the vehicle body 2, the trim 8 of the door 6 and the like when the door 6 is closed.

  Moreover, the weather strip 6w for waterproofing is provided in the door 6 along the peripheral part (refer FIG. 2, FIG. 4). The weather strip 6w is an elastic member formed of rubber or the like that can be in close contact with the opening edge of the entrance / exit of the vehicle body 2 and keep a watertight state inside and outside the vehicle with the door 6 closed. And this wire harness wiring structure part 10 is comprised so that the wire harness WH may be wired from the weather strip 6w to the vehicle inside.

  Further, here, the wire harness WH is routed between the vehicle body 2 and the door 6 from the weather strip 6w (at least one of the outermost sides of the vehicle when provided in plural), so that the introduction opening 6h And the through-hole part 2h is formed inside the weather strip 6w.

  The wire harness wiring structure portion 10 includes the wire harness WH, a protector P in which an accommodation space is formed, and a cylindrical grommet 60 (see FIG. 1). A portion including a portion spanned from the vehicle body 2 to the door 6 in the wire harness WH is covered with a grommet 60. The relative positional relationship of a part of one end side of the wire harness WH with respect to the vehicle body 2 and the relative positional relationship of a part of the other end side of the wire harness WH with respect to the door 6 are fixed. .

  The protector P is disposed in the door 6 and has a cylindrical insertion port 52 into which the wire harness WH is inserted. The wire harness can bypass the wire harness WH inserted from the insertion port 52. It is a member accommodated in a state having a margin (see FIG. 3). The protector P has a housing part 40 and a guide part 50.

  More specifically, the guide part 50 is a cylindrical part which has the insertion port part 52 and guides the wire harness WH to the accommodating part 40. The insertion port portion 52 is a portion including one end portion of the guide portion 50. The other end portion of the guide portion 50 is continuous with one end portion of the accommodating portion 40. Further, the accommodating portion 40 is a portion that is arranged in the door 6 continuously to the guide portion 50 and accommodates the wire harness WH extending from the other end portion of the guide portion 50 in a state having a marginal space. The accommodating part 40 has an accommodating space including a marginal space. The accommodating portion 40 has an outlet 44 through which the wire harness WH is pulled out from the accommodating space into the door 6. That is, the protector P is inserted into the guide portion 50 through the insertion port portion 52 and accommodates the wire harness WH extending from the other end portion of the guide portion 50 in the accommodation space of the accommodation portion 40 and the outlet 44. It is a member routed to the outside, that is, inside the door 6. The wire harness WH is protected from the peripheral members by the protector P in the door 6. 1 and 3 show a protector P in which the insertion port 52 and the outlet 44 penetrate in a direction substantially orthogonal to each other and are formed in a substantially L shape in a side view as a whole.

  Hereinafter, the protector P will be described in more detail by focusing on the configurations of the guide unit 50 and the storage unit 40. In the following description, the protector P is viewed from the front side of the door 6 and is viewed from the vehicle inner side in a state of being disposed in the door 6.

  The guide part 50 is formed in a substantially rectangular cylindrical shape extending in a substantially straight section, and can guide the wire harness WH inserted into the guide part 50 through the insertion port 52 along a substantially linear advance / retreat path. It is. The guide portion 50 may be formed in a cylindrical shape such as a substantially oval shape, a circular shape, or a polygonal shape in cross section.

  Moreover, the insertion port part 52 is formed so that it may spread toward an outer peripheral side toward one edge part (refer FIG. 3, FIG. 4). Here, the insertion port portion 52 is formed so as to gradually expand toward one end portion in all directions substantially orthogonal to the extending direction.

  The accommodating portion 40 includes a wire harness WH extending from the other end of the guide portion 50, a first route R1, and a second route R2 swelled so that an intermediate portion is separated from the first route R1. It is formed so that it can be accommodated so as to be able to absorb the extra length by detouring by bending between them (see FIGS. 1 and 3).

  The storage portion 40 includes a first wall portion 41 and a second wall portion 42 that are opposed to each other with the storage space in a side view. The wire harness WH accommodated in the accommodation space is disposed close to the first wall portion 41 when passing through the first route R1 and close to the second wall portion 42 when passing through the second route R2. . That is, in a state where the wire harness WH passes through the first path R1, there is a margin space on the second wall portion 42 side of the wire harness WH. Each of the first wall portion 41 and the second wall portion 42 has one end portion continuous with the other end portion of the guide portion 50, and each other end portion continuous with the outlet 44. More specifically, the first wall portion 41 extends so as to connect the other end portion of the guide portion 50 and the outlet 44 of the housing portion 40 on the inner peripheral side of the protector P having a substantially L shape in side view. doing. In addition, the second wall portion 42 is spaced from the first wall portion 41 so that the wire harness WH can be bent and deformed, and is on the outer peripheral side of the substantially L-shaped protector P in side view, and the other end of the guide portion 50. It extends so as to connect the section and the outlet 44.

  Explaining in relation to the opening / closing operation of the door 6, in the opened state of the door 6, the wire harness WH extending from the other end portion of the guide portion 50 is in a state where a marginal space is opened on the second wall portion 42 side. It is accommodated in the accommodation space through one route R1 (see FIG. 1).

  Further, when the door 6 is closed from the open position, the wire harness WH extending from the other end of the guide portion 50 is pushed into the marginal space in the accommodation space so as to be close to the second wall portion 42. Bend. And if the door 6 will be in a closed position, the wire harness WH will be in the state accommodated in the accommodation space through 2nd path | route R2 (refer FIG. 3). That is, as compared with the open state of the door 6, the extra length is absorbed by the length of the portion accommodated in the accommodation space in the wire harness WH. At the time of the door opening operation, the wire harness WH is pulled out from the accommodation space to the guide portion 50 side, and the route is changed from the second route R2 to the first route R1.

  The accommodating portion 40 has an in-door positioning portion 46 that can fix the wire harness WH at the outlet 44. The door positioning portion 46 is formed in a shape in which the opening edge of the outlet 44 is partially extended (here, in an L shape in cross section). Then, the wire harness WH drawn through the outlet 44 is in contact with the inside of the in-door positioning portion 46 and is fastened together with a tape T or tie band and fixed (here, fixed with a tape T). ), Positioning in the door 6 is possible. Thereby, even if the wire harness WH on the vehicle body 2 side advances or retreats in the housing portion 40 during the opening / closing operation of the door 6, it is possible to prevent the wire harness WH routed in the door 6 from being pulled or loosened. Thus, the surplus length can be absorbed more reliably in the accommodation space.

  The structure for fixing the wire harness WH to the housing portion 40 is not limited to the in-door positioning portion 46, and a plurality of holes for inserting a tie band are formed in the in-door positioning portion extending in a wall shape from the outlet 44. The wire harness WH may be fastened and fixed by inserting the tie band into the hole.

  In addition, from the viewpoint of reducing the load applied to the wire harness WH, the preferable shape of the accommodating portion 40 is as follows. Hereinafter, the shapes of the first wall portion 41 and the second wall portion 42 in a side view will be described more specifically (see FIG. 3). That is, in the open state of the door 6, the first wall portion 41 has an intermediate portion between the other end portion of the guide portion 50 and the door positioning portion 46 in the wire harness WH, and the other end portion of the guide portion 50. It is formed so as to be capable of path regulation so as to be accommodated along a path parallel to the direction connecting the door positioning part 46.

  Further, the second wall portion 42 is configured to be able to regulate the path of the wire harness WH that varies with the closing operation of the door 6. Here, the 2nd wall part 42 is formed in the shape where a curved wall part connects the guide part side wall part along the penetration direction of the insertion port part 52, and the extraction side wall part along the penetration direction of the extraction opening 44. As shown in FIG. ing. The curved wall portion is formed so as to bulge by a size smaller than the diameter of the wire harness WH in a direction partially away from the guide portion 50.

  This protector P is partially or entirely (entirely shown in FIGS. 2 and 4) in a recess 7 h formed in the door inner panel 7 in the door 6, that is, between the door inner panel 7 and the trim 8. Be contained. More specifically, the protector P is disposed in the door 6 such that the guide portion 50 is positioned on the front end side of the door 6 with respect to the accommodating portion 40 and the outlet 44 faces the upper side of the door 6. . Note that the term “facing upward” is not limited to the form facing upward in the vertical direction, but includes a form inclining upward and facing upward.

  Further, the attachment position of the protector P will be described in relation to the attachment position of the protector P with respect to the vehicle body 2. In the protector P, the wire harness WH is bridged below the opening restriction portion 3 between the vehicle body 2 and the door 6. Thus, it is attached to the vehicle body 2 and disposed in the door 6. Moreover, the protector P is arrange | positioned in the door 6 so that the insertion port part 52 may be located under the site | part connected with the opening degree control part 3 in the door 6 (door inner panel 7). Further, the protector P is attached to the vehicle body 2 in a positional relationship in which the through hole portion 2h of the vehicle body 2 and the insertion port portion 52 face each other in the insertion direction S (the front-rear direction of the vehicle body 2) when the door 6 is closed. (See FIGS. 3 and 4). And in the closed state of the door 6, the wire harness WH extended between the vehicle body 2 and the door 6 is extended substantially linearly.

  Here, the protector P has the fixing | fixed part 58 which can be fitted with respect to the hole formed in the door inner panel 7 (FIG. 2, FIG. 4). The fixing portion 58 is formed so as to be fitted into the hole portion by pressing the protector P toward the vehicle inner side against the door inner panel 7 (in a direction in which the guide portion 50 is accommodated in the concave portion 7h). Yes. For example, the fixed portion 58 has a base shaft portion that protrudes from the side surface of the protector P, and a latching portion that is formed so as to expand from the distal end portion to the outer peripheral side and elastically deformable on the inner peripheral side. it can. Here, the fixing part 58 is provided in two places so that it may protrude from the insertion port part 52 and the accommodating part 40 of the guide part 50 among the one side surfaces of the protector P, respectively. More specifically, the fixing portion 58 protrudes toward the vehicle outer side from the side surface on the vehicle outer side of the protector P disposed in the recess 7h.

  When the fixing portion 58 is inserted into the hole formed in the door inner panel 7, the locking portion comes into contact with the peripheral edge of the hole and elastically deforms toward the inner peripheral side. It elastically returns to the outer peripheral side and engages with the peripheral edge of the hole from the outside of the vehicle. Thus, according to the protector P that can be fixed to the door inner panel 7 by the fixing portion 58, it can be easily fixed by simply pressing against the door inner panel 7.

  But the structure for fixing the protector P with respect to the door inner panel 7 should just be arrange | positioned in the door 6 with said attitude | position and position, and another fixing structure may be employ | adopted. For example, the protector P may have a shape that can be fixed to the door inner panel 7 by screwing, bolting, stud bolting, bracket fixing, clip fixing, or the like.

  The protector P having the housing portion 40 and the guide portion 50 can employ a configuration in which, for example, a concave first member P1 and a lid-like second member P2 are combined (see FIGS. 2 and 4). ). In addition, in FIG. 1, FIG. 3, the protector P which abbreviate | omitted the 2nd member P2 is shown. The first member P1 and the second member P2 are provided with a plurality of locking portions on one side and a plurality of locked portions on which the locking portions can be locked on the other side in order to maintain the combined state. A part may be provided. The locking portion and the locked portion are omitted in the drawing. And the protector P can be comprised by manufacturing and uniting the 1st member P1 and the 2nd member P2 by injection molding etc., respectively. The protector P may be configured by a combination of concave members or the like, or may be configured as a concave shape as a whole and closed by the trim 8.

  However, the accommodating portion 40 and the guide portion 50 are not limited to being formed as a one-piece protector P, and a separate accommodating portion 40 is connected to the other end side of the guide portion 50. May be arranged.

  Moreover, the protector P should just be able to accommodate the wire harness WH inserted from the insertion port part 52 with an allowance space, and is not restricted to the said shape. For example, even if the wire harness WH is wound and accommodated in a ring shape, a shape having an accommodating portion that can be bypassed by changing the diameter of the ring portion, or a shape in which the guide portion is configured by only the insertion port portion 52 is adopted. Good.

  The grommet 60 is a tubular member as a whole, and includes a vehicle body side water stop portion (“vehicle body side attachment portion”) 62, a door side water stop portion (“door side attachment portion”) 72, and an intermediate water stop portion ( ("Bellows tube part") 81 (see FIG. 5). More specifically, the grommet 60 inserts and protects the wire harness WH routed between the vehicle body 2 and the door 6 and suppresses the drooping and bending of the wire harness WH. The grommet 60 is also a water stop member for suppressing the entry of water, dust, sand, and the like into the vehicle body 2, the protector P, and the door 6. The wire harness WH inserted through the grommet 60 is introduced into the guide portion 50 of the protector P as the door 6 is closed. The grommet 60 is exposed so that its appearance can be observed with the door opened.

  The housing portion 40 of the protector P includes an inner space of the intermediate water stop portion 81 by the door side water stop portion 72 of the vehicle body side water stop portion 62 and the door side water stop portion 72 that are a pair of attachment portions of the grommet 60. An accommodation space connected in communication is formed. And the protector P accommodates in the said accommodation space the wire harness WH pulled out to the door 6 side from the grommet 60, and was introduce | transduced in the guide part 50. FIG.

  The grommet 60 is integrally formed by injection molding a rubber material or the like as a whole. More specifically, the grommet 60 (especially the intermediate water stop portion 81) is made of an elastic material such as a relatively hard rubber or elastomer having a rigidity high enough to suppress the drooping and bending of the wire harness WH inserted through the grommet 60. It only has to be formed.

  The vehicle body side water stop 62 is connected to the end of the intermediate water stop 81 on the vehicle body 2 side. The vehicle body side water stop 62 is fitted and attached to the through hole 2h of the vehicle 2 and is a part for suppressing water, dust and sand from entering the vehicle 2 from the through hole 2h. . The vehicle body water stop portion 62 includes a vehicle body mounting portion 63 having a circular cross section that is reduced in diameter toward the tip, and a cylindrical wire harness insertion portion 64 that is continuous with the reduced diameter end of the vehicle body mounting portion 63. In addition, the vehicle body side water stop part 62 may be attached to the door 6 via the resin member etc. which were fixed to the vehicle body side water stop part 62, for example. That is, the vehicle body water stop 62 is a part attached to the vehicle body 2 side.

  A locking groove 65 is formed in the outer peripheral portion on the side of the enlarged diameter end of the vehicle body mounting portion 63 along the circumferential direction, and the locking groove 65 is fitted to the periphery of the through hole portion 2 h formed in the vehicle body 2. The grommet 60 is attached to the vehicle body 2 by being locked.

  The inner wall of the wire harness insertion part 64 is in close contact with the outer periphery of the wire harness WH. That is, the inner diameter of the wire harness insertion part 64 is smaller than the outer diameter of the wire harness WH, and the wire harness WH inserted inside is tightened from the outer peripheral side by an elastic force. Thereby, the clearance gap between the wire harness WH and the inner wall of the wire harness insertion part 64 is stopped.

  The door side water stop 72 is connected to the end of the intermediate water stop 81 on the door 6 side. The door-side water stop 72 is a part for suppressing water, dust, sand, and the like from entering the inside of the introduction opening 6h and the insertion opening 52 of the protector P. This door side water stop part 72 has the cylinder part 74, the rib 75 for water stop, and the collar part 76 (refer FIG. 5).

  The cylindrical portion 74 is a portion that covers the insertion port portion 52 of the guide portion 50. The cylindrical portion 74 is formed in a cylindrical shape having an internal shape corresponding to the outer shape of the insertion port portion 52 (here, a cylindrical shape having a substantially rectangular shape in cross section), and the size of the cylindrical portion 74 is the same as the outer shape of the insertion port portion 52. It is set smaller (slightly smaller here). That is, the cylindrical portion 74 is covered by the insertion port portion 52 in a state where it is in contact with the outer peripheral surface of the insertion port portion 52 in the entire circumferential direction. Here, since the insertion port 52 is formed in a shape that expands to the outer peripheral side at one end, the internal space of the cylindrical portion 74 corresponds to the shape of one end of the insertion port 52. A part of the central axis extends to the outer peripheral side.

  When the trim 8 is attached to the door inner panel 7, the cylindrical portion 74 covered with the insertion opening 52 is sandwiched between the door inner panel 7 and the trim 8 by the introduction opening 6 h and is both inside and outside the vehicle. It will be in the state which touched the direction. But the cylindrical part 74 does not ask | require the presence or absence of the contact with respect to the door inner panel 7 and the trim 8, but it contributes also to rattling suppression of the protector P by contacting.

  The inner circumferential portion of the cylindrical portion 74 is provided with a water stopping rib 75 that protrudes toward the inner circumferential side and is formed in a protruding line along the circumferential direction (see FIG. 5). Here, a pair of water-stopping ribs 75 are provided at intervals in the central axis direction of the cylindrical portion 74. The water stopping rib 75 is formed in a shape that is convex in a substantially arc shape in cross section. For example, the protruding dimension of the water stopping rib 75 may be set to 0.1 to 2.0 mm. And in the state where the cylinder part 74 was covered on the insertion port part 52, the rib 75 for water stop contacts with the outer peripheral surface of the insertion port part 52, and is larger than the force which the cylinder part 74 clamps the insertion port part 52. Tightened with force.

  From the viewpoint of water stoppage, dustproof performance, and the like, it is preferable that the cylindrical portion 74 is in close contact with the outer peripheral surface of the insertion port portion 52 over the entire circumferential direction. Here, at least a part of the outer peripheral portion in the central axis direction of the insertion port portion 52 is formed flat in the entire circumferential direction. That is, when the cylindrical portion 74 (preferably the water stopping rib 75) is covered with a portion of the insertion port portion 52 whose outer peripheral portion is formed flat in the entire circumferential direction, the cylindrical portion 74 and the insertion port portion 52 The gap can be eliminated or made smaller.

  The flange portion 76 is a portion that is formed in a flange shape that extends from the outer peripheral portion of the cylindrical portion 74 to the outer peripheral side, and covers the introduction opening 6h of the door 6 (see FIG. 5). The flange 76 has a shape corresponding to the introduction opening 6h formed inside the recess 7h and the trim 8 of the door inner panel 7, and is formed larger than the introduction opening 6h. More specifically, the flange portion 76 is set to have a size that covers the introduction opening 6 h and overlaps from the front end side of the door 6 with respect to the peripheral portion constituted by the door inner panel 7 and the trim 8. Yes.

  The collar portion 76 is provided with a first door contact portion 76a and a second door contact portion 76b. The first door contact portion 76 a and the second door contact portion 76 b are portions that are in close contact with the peripheral edge portion of the introduction opening 6 h of the door 6 from the front end side of the door 6. More specifically, the first door contact portion 76a protrudes from the flange portion 76 in a direction from the vehicle body side water stop portion 62 side of the grommet 60 toward the door side water stop portion 72 side, and is formed at the peripheral portion of the introduction opening 6h. It is formed in the protruding ridge along. In addition, the second door contact portion 76b extends from the outer peripheral side of the first door contact portion 76a in the flange portion 76 to the door side from the vehicle body side water stop portion 62 side of the grommet 60 along the peripheral edge portion of the introduction opening 6h. It is formed in the shape of an umbrella that protrudes while spreading toward the outer peripheral side toward the water stop portion 72 side.

  The first door contact portion 76a abuts along the peripheral edge of the introduction opening 6h while the cylindrical portion 74 is put on the insertion port portion 52 of the protector P disposed on the door 6, and the second door The close contact portion 76b is elastically deformed so as to expand to the outer peripheral side, and is brought into surface contact with the peripheral portion of the introduction opening 6h along the peripheral portion on the outer peripheral side from the first door close contact portion 76a. The first door contact portion 76a and the second door contact portion 76b are fixed at a fixed position with respect to the guide portion 50 by the force with which the cylindrical portion 74 tightens the insertion port portion 52, and are arranged at the peripheral portion of the introduction opening 6h. It is pressed against. Thereby, the introduction opening 6h of the door 6 is shielded.

  The intermediate water stop portion 81 is a tubular portion that can be expanded and contracted, and connects the vehicle body water stop portion 62 and the door side water stop portion 72 and spans between the vehicle body 2 and the door 6. It is formed in a shape that covers the wire harness WH. The intermediate water stop portion 81 has a bellows tube shape in which peaks 86 and valley portions 88 are alternately provided in the length direction of the intermediate water stop portion 81 (axial length direction, direction along the axial center) and can expand and contract. A bellows portion 82 and a tube portion 83 are provided. One end portion of the cylinder portion 83 is connected to the rear end portion of the vehicle body side water stop portion 62, and the other end portion of the cylinder portion 83 is connected to one end portion of the bellows portion 82. The part 82 and the vehicle body water stop part 62 are connected via a cylinder part 83. Further, the bellows portion 82 is connected to the door-side water stop portion 72 by connecting the other end to the front end portion of the door-side water stop portion 72. Note that the vehicle body side water stop portion 62 and the bellows portion 82 may be directly connected without the intermediate water stop portion 81 having the tube portion 83. Further, the intermediate water stop portion 81 may include a cylindrical portion 83 not only at one end portion of the bellows portion 82 but also at the other end portion, and may be connected to the door-side water stop portion 72 by the cylindrical portion 83.

  More specifically, the bellows portion 82 has a bellows shape formed in a substantially triangular wave shape in a sectional view in the direction along the axis, and has a large-diameter annular peak 86 and a small-diameter annular valley. 88 are provided alternately and continuously along the length direction (axial length direction) of the bellows portion 82. The adjacent peak portions 86 and valley portions 88 are connected by an inclined wall portion (“slope portion”) 84 formed in a flare shape. For this reason, the bellows part 82 has stretchability in a direction along the axis that is the longitudinal center line, and flexibility that bends in a direction that intersects the axis.

  More specifically, the bellows portion 82 contracts in the direction along the axis when the inner angle of the adjacent inclined wall portion 84 becomes smaller, and extends in the direction along the axis when the inner angle becomes larger. . Further, when bending is performed by applying a force in a direction perpendicular to the axial center, the inner angle between the inclined wall portions 84 on the outer peripheral side is relatively larger than the inner angle between the inclined wall portions 84 on the inner peripheral side, and the inner wall is deformed. To do. Thereby, the intermediate water stop part 81 contracts and expands with the opening / closing operation | movement of the door 6 in the state which inserted and accommodated a part of wire harness WH routed between the vehicle body 2 and the door 6 inside. It is formed to be deformable. The intermediate water stop portion 81 is preferably formed in a flat shape (for example, a flat shape such as a substantially oval shape or a substantially rectangular shape in a cross-sectional view in a direction perpendicular to the axial center). It may be a cylindrical shape, and may be a circular shape in cross section or a cylindrical shape such as a regular polygon.

  In the open state of the door 6, the vehicle body side water stop portion 62 and the door side water stop portion 72 are positioned apart from each other, and the intermediate water stop portion 81 is maintained in an extended state and extends in a bent manner (see FIG. 1, see FIG. When the door 6 is closed from the open posture, the vehicle body side water stop portion 62 and the door side water stop portion 72 come close to each other, and the intermediate water stop portion 81 contracts. And in the closed state of the door 6, the intermediate water stop part 81 is maintained in a contracted state (refer FIG. 3, FIG. 4). In the opening operation of the door, contrary to the closing operation, the vehicle body side water stop portion 62 and the door side water stop portion 72 are separated from each other, and the intermediate water stop portion 81 extends. Thus, the grommet 60 moves and deforms following the operation of the door 6 by including the intermediate water stop portion 81. The extra length portion of the wire harness WH corresponding to the fluctuation width of the distance between the vehicle body 2 and the door 6 in the opening / closing operation of the door 6 according to the contraction of the intermediate water stop portion 81 extends from the grommet 60 to the housing portion 40 side of the protector P. The extra length portion is pulled out from the protector P to the grommet 60 side as the grommet 60 is extended.

  The bellows portion 82 formed in the intermediate water stop portion 81 will be further described. As shown in FIG. 6, the inclined wall portion 84 is an inclined wall portion having a uniform thickness (a space between the outer peripheral surface 91 and the inner peripheral surface 92) d <b> 1 formed in a flared shape in the bellows portion 82. . The peak portion 86 is a large-diameter annular wall portion that is connected to the inclined wall portion 84 in the bellows portion 82 and is radially outside the bellows portion 82 relative to the inclined wall portion 84. In the mountain portion 86, the inner peripheral surface of the bellows portion 82 has the radially outer side of the outer peripheral surface 91 of the inclined wall portion 84 with respect to the extended surface obtained by extending the inner peripheral surface 92 of the inclined wall portion 84 outward in the radial direction. The part which begins to approach the extended surface side to is also included. The valley portion 88 is a small-diameter annular wall portion on the radially inner side of the inclined wall portion 84 connected to the inclined wall portion 84 in the bellows portion 82. In the valley portion 88, the inner peripheral surface of the bellows portion 82 is on the inner side in the radial direction of the outer peripheral surface 91 of the inclined wall portion 84 rather than the extended surface in which the inner peripheral surface 92 of the inclined wall portion 84 extends in the radial direction. The part which begins to approach the extended surface side of is also included.

  The thickness of the peak portion 86 and the valley portion 88 is smaller than the thickness d1 of the inclined wall portion 84. The top part of the peak part 86 is the thinnest formed in the peak part 86, and the thickness thereof is d2. The bottom of the valley portion 88 is formed to be the thinnest in the valley portion 88, and the thickness thereof is d2. In addition, the thickness d2 of the top portion of the peak portion 86 and the bottom portion of the valley portion 88 is preferably set to about 1/2 to 2/3 with respect to the thickness d1 of the inclined wall portion 84. In addition, the thickness of the peak part 86 and the thickness of the trough part 88 may mutually differ. The thickness d1 of the inclined wall portion 84 is preferably set to a uniform thickness over the entire bellows portion 82. However, if the thickness of the peak portion 86 and the valley portion 88 is smaller than the thickness of the inclined wall portion 84, Even if the thickness of the inclined wall portion 84 is not uniform, the usefulness of the present invention is not impaired.

  In the cross-sectional shape of the bellows portion 82 shown in FIG. 6, an example is shown in which straight line segments are continuous in a broken line shape, but the corners of the connecting portions of the line segments may be rounded. Moreover, the bellows part 82 may be comprised by the planar inclined wall part 84 and the crest-like peak part 86 and trough part 88 (refer FIG. 7), for example. In the example shown in FIG. 7, the thicknesses of the adjacent peak portions 86 and valley portions 88 are thinner than the thickness d <b> 1 of the inclined wall portion 84 that connects the peak portions 86 and the valley portions 88. A bellows portion 82 is formed, and the thickness of the top portion of the valley portion 88 and the bottom portion of the valley portion 88 is d2.

  As shown in FIGS. 6 and 7, in the bellows portion 82, the inner peripheral surface 92 of the two inclined wall portions 84 adjacent to each other with the mountain portion 86 of the bellows portion 82 in the cross section in the axial length direction. The intersection 111 of the extended lines obtained by extending the substantially straight outlines along the outline outward in the radial direction of the bellows part 82, and the end points 112 and 113 on the mountain 86 side of the outlines, respectively. The ridge 86 is formed so that the contour line of the inner peripheral surface of the ridge 86 is on the outer peripheral surface side of the ridge 86 with respect to the connected broken line 101.

  In the case where the bellows portion 82 having a thickness of the peak portion 86 and the valley portion 88 that is thinner than the thickness of the inclined wall portion 84 is extended, the inclined wall portions 84 that are adjacent to each other in connection with the peak portion 86 or the valley portion 88. The angle α formed is larger than the angle β formed by the adjacent inclined wall portions 184 when the bellows portion 182 having the same thickness of the peak portion 186, the valley portion 188, and the inclined wall portion 184 is extended (FIG. 8). Accordingly, the bellows portion 82 becomes flatter than the bellows portion 182 in the extended state. In addition, if the lengths of the inclined surface portions of the bellows portion 82 and the bellows portion 182 are equal and the number of the bellows portions 182 is equal, the bellows portion 82 having a flatter length along the axial length direction in the stretched state is more flat. Longer than 182.

  In other words, when an extended grommet is extended between the door 6 and the vehicle body 2 in the open state, the grommet having a bellows portion that is flatter is more along the surface of the bellows portion. Therefore, the elastic material required for generating the grommet can be saved. Even in the extended state of the bellows portion 82 where the thickness of the peak portion and the valley portion is thinner than that of the slope portion, the bellows portion 82 does not become completely flat, and some valleys remain. Thereby, since the bellows part 82 can return from an expansion | extension state to a contracted state, even if the bellows part 82 is employ | adopted, the buckling of the grommet 60 is suppressed. Therefore, disconnection of the electric wire due to abrasion between the bellows portion 82 and the wire harness WH due to buckling is also suppressed. In FIG. 8, the thickness of the bellows portion is omitted.

  So far, the grommet 60 has been described as an example in which the door-side water stop 72 has the flange 76, but the flange 76 may be omitted. That is, when the cylindrical portion 74 is placed on the insertion opening 52, entry of water, dust, sand, or the like into the protector P can be suppressed, and when the cylindrical portion 74 is covered by the guide portion 50, the introduction opening 6h. Even when the gap between the guide portion 50 is shielded by the cylindrical portion 74 or when the gap between the peripheral edge of the introduction opening 6h and the cylindrical portion 74 is sufficiently small, water, dust, sand, etc. into the door 6 Intrusion is suppressed. But when the clearance gap between the opening edge part of the introduction opening part 6h and the cylinder part 74 is large, it is preferable that the collar part 76 is provided.

  Moreover, the rib 75 for water stop of the door side water stop part 72 may be abbreviate | omitted. That is, the cylindrical portion 74 is covered with the insertion port portion 52, so that an effect of suppressing intrusion of water, dust, sand, and the like can be obtained. The gap between the insertion port portion 52 and the outer peripheral portion can be made smaller to prevent entry of water, dust, sand, and the like. Further, in order to increase the tightening strength of the insertion port portion 52 by the cylinder portion 74, the cylinder portion 74 is connected to the cylinder portion 74 by a tie band or the like disposed along the outer periphery of the cylinder portion 74 placed on the insertion port portion 52. A configuration of tightening in the axial direction may be adopted.

  The said wire harness wiring structure part 10 is good to modularize the wire harness WH routed in the door 6 from the vehicle body 2, the protector P, and the grommet 60, and to assemble it before vehicle assembly. More specifically, the wire harness WH extending through the grommet 60 through the wire harness WH and extending from the vehicle body side water stop portion 62 is fixed to the vehicle body side water stop portion 62 with a tape T. And while wiring the wire harness WH extended from the cylinder part 74 of the grommet 60 in the guide part 50 of the protector P, the wire harness WH extended from the other edge part of the guide part 50 is put in the accommodating part 40. The portion that is accommodated and pulled out from the outlet 44 is fixed to the in-door positioning portion 46 with a tape T. Further, the vehicle body side water stop portion 62 of the grommet 60 may be attached to the through hole portion 2 h of the vehicle body 2, and the door side water stop portion 72 may be covered with the insertion port portion 52 of the protector P.

  So far, the wire harness wiring structure 10 has been described as an example in which the wire harness WH is directly inserted into the grommet 60, but the wire harness wiring structure 10 is between the vehicle body 2 and the door 6. You may provide the exterior member for introduce | transducing this wire harness WH smoothly into the guide part 50, suppressing the drooping and bending of the wire harness WH spanned. The exterior member is a cylindrical member having rigidity capable of supporting the wire harness WH, that is, at least higher rigidity than the wire harness WH. The exterior member is preferably a member having higher rigidity than the grommet 60. Specifically, as the exterior member, a corrugated tube manufactured by extrusion molding and blow molding or vacuum molding of a synthetic resin (for example, PP (polypropylene), PA (polyamide), etc.) is employed.

  When an exterior member is employed for the wire harness wiring structure 10, the exterior member is covered with the wire harness WH and the exterior member is inserted through the grommet 60. Then, a part of one end portion side of the exterior member extending from the end portion of the vehicle body side water stop portion 62 is fixed to the vehicle body side water stop portion 62 by winding the tape T, and from one end portion of the exterior member. A portion of the extended wire harness WH is T-wound and fixed to the one end. Further, a part of the wire harness WH extending from the other end of the exterior member is fixed by winding the tape T around the other end. Then, a part including the other end portion of the exterior member is introduced into the guide portion 50 of the protector P, and the wire harness WH extending from the other end portion of the exterior member is accommodated in the accommodation portion 40 to be pulled out. The portion pulled out from the door is fixed with a tape T around the door positioning portion 46.

  Moreover, until now, the example in which the water stop rib 75 is provided in the door side water stop part 72 was demonstrated, but in order to improve the waterproof and dustproof performance between the guide part 50 and the cylinder part 74, At least one of the cylindrical portion 74 or the insertion port portion 52 is formed as a convex strip extending in the circumferential direction protruding toward the inner peripheral side or the outer peripheral side, and the outer peripheral surface of the insertion port portion 52 or the inner peripheral surface of the cylindrical portion 74. What is necessary is just to have the water stop rib which contacts. In addition, a water stop rib may be provided in both the insertion port portion and the cylindrical portion of the door side water stop portion.

  Moreover, although the wire harness wiring structure part 10 was demonstrated to the example applied to the door 6 as a front side door until now, it is applicable also to the other door connected with the vehicle body 2 by the hinge. For example, when applied to a rear side door, the wire harness WH is bridged between a center pillar (a pillar between the front side door and the rear side door) and the rear side door. That is, a hole is formed in the center pillar, and the vehicle body side water stop portion 62 of the grommet 60 is attached thereto. Moreover, the wire harness wiring structure part 10 is applicable also to the back door behind a vehicle body.

  In addition, the grommet 60 may be applied to a wire harness routing structure portion that routes the wire harness WH between the vehicle body 2 and the door 6 without providing the protector P. In this case, the door-side water stop 72 of the grommet 60 is attached to the introduction opening 6 h of the door 6, and a part of the wire harness WH pulled out from the door-side water stop 72 is part of the door-side water stop 72. The wire harness WH is routed in the door 6 with the positional relationship fixed. That is, the door side water stop part 72 of the grommet 60 is a part attached to the door 6 side.

  According to the grommet 60 according to the present embodiment configured as described above, the bellows portion 82 has a thickness of each of the adjacent peak portion 86 and the valley portion 88 such that the peak portion 86 and the valley portion 88 Is thinner than the thickness of the sloped wall 84 connecting the slopes 84 or 88, and the sloped walls 84 adjacent to each other with the crest 86 or the valley 88 in between, It is opened so that the angle it makes becomes larger. Accordingly, since the bellows part 82 is more easily extended, the shape of the bellows part 82 can be made flat, and the folds of the bellows part 82 can be made inconspicuous.

  Further, according to the grommet 60 according to the present embodiment configured as described above, in the cross section in the axial length direction of the bellows portion 82, two inclined walls adjacent to each other with the mountain portion 86 interposed therebetween in the bellows portion 82. With respect to the broken line 101 connecting the intersection 111 of each extension line of each contour line of the inner peripheral surface 92 of the portion 84 and each of the end points 112 and 113 on the peak portion 86 side of each contour line, the peak portion The contour line of the inner peripheral surface 86 is on the outer peripheral surface side of the peak portion 86. The inner peripheral surface of such a ridge 86 is an inner periphery formed to be recessed toward the outer peripheral surface side with respect to the inner peripheral surface of the ridge when the thickness of the bellows portion 82 is uniform over the entire length. It can be realized by a surface. Accordingly, since the thickness of the peak portion can be made thinner than the slope portion without providing a local depression or the like on the outer peripheral surface observed from the outside, when the bellows portion 82 is extended by opening the door, The fold can be made less noticeable.

  Further, according to the grommet 60 according to the present embodiment configured as described above, the protector P of the wire harness wiring structure portion 10 is intermediately stopped by the door-side water stop portion 72 of the pair of attachment portions of the grommet 60. The housing portion 40 is provided with a housing space that is connected in communication with the internal space of the water portion 81. And the protector P accommodates the wire harness WH pulled out to the door 6 side from the grommet 60 in the said accommodation space. Therefore, when the door 6 is opened and the extended grommet 60 is exposed in the wire harness routing structure portion 10, the folds of the bellows portion 82 can be made inconspicuous.

  As described above, the grommet 60 and the wire harness routing structure 10 including the grommet 60 have been described in detail. However, the above description is an example in all aspects, and the present invention is not limited thereto. Absent. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Wire harness wiring structure part 2 Car body 40 Housing part 6 Door 60 Grommet 62 Car body side water stop part (car body side attaching part)
72 Door-side water stop (door-side mounting)
81 Intermediate water stop (bellows tube)
82 bellows 84 sloping wall (slope)
86 Mountain part 88 Valley part P Protector WH Wire harness

Claims (3)

A grommet that protects the wire harness that is routed between the vehicle body and the door connected to the vehicle body by inserting the wire harness therein.
A bellows tube portion having bellows portions that are alternately provided in the length direction and can be expanded and contracted;
A pair of attachment portions respectively provided at both end portions of the bellows tube portion and attached to the vehicle body side and the door side;
With
The bellows part is
A grommet in which the thicknesses of the adjacent peak and valley are thinner than the slope of the slope connecting the peak and the valley. The grommet according to claim 1,
In the cross section in the axial direction of the bellows part,
Of the bellows portion, the intersection of the extended lines of the respective contour lines of the inner peripheral surfaces of two slope portions adjacent to each other with the mountain portion interposed therebetween, and each of the end points on the mountain portion side of the contour lines A grommet in which the contour line of the inner peripheral surface of the peak portion is on the outer peripheral surface side of the peak portion with respect to the connected broken line. The grommet according to claim 1 or 2,
The wire harness;
Of the pair of attachment portions of the grommets, the attachment portion on the door side includes an accommodation portion in which an accommodation space connected to the internal space of the bellows cylinder portion is formed. A protector for accommodating the wire harness drawn out to
A wire harness wiring structure part.

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