JP6155246B2 - Grommet - Google Patents

Description

  The present invention relates to a grommet that includes an inner member that fits into a through-hole formed in a partition wall of a vehicle body panel or the like in an automobile, and a tubular grommet body that passes through the wire harness, and improves the waterproof performance and dust-proof performance of the wire harness. .

  In order to penetrate the through-hole formed in the partition wall and improve the waterproof performance and dust-proof performance of the wire harness routed along the partition wall, the tubular grommet body attached along the partition wall and the through-hole of the partition wall Grommets that pass through the wire harness are widely used with the inner member attached to the inner member.

In recent years, with the reduction in weight and space of vehicles, the wire harness itself has been required to be compact, and it has been necessary to route the wire harness along the routing route.
If the wire harness cannot be routed along the routing route, the compact wire harness has a small excess length with respect to the routing length, so it cannot be connected to a connection target such as an electronic device and forcibly connected to the connection target. For this reason, the wire harness is pulled and wired. As described above, when the wiring harness is pulled and wired, a tensile force always acts on the wired harness, and there is a possibility that the electrical connectivity cannot be secured due to disconnection.

  In addition, for example, many electrical parts such as rear glass defoggers, high-mount stop lamps, back cameras, and electric open / close curtains are mounted on the back door of the vehicle, and mounted on the partition including the vehicle door. With the increasing complexity and diversification of electrical components, the number of electric wires and the diameter of each electric wire have increased, and the diameter of the wire harness formed by bundling these electric wires has also increased.

  For example, the grommet disclosed in Patent Document 1 is formed so that the bellows-shaped grommet body can be bent with a material having low shape retention such as rubber or elastomer, so that when a wire harness having a large diameter is inserted, The straight portion of the grommet body is bent along the shape of the wire harness, and may not be routed along the routing route.

  In particular, when wiring along a vertical partition wall or when vibration is applied, the diameter of the wire harness is increased due to its own weight or vibration. It will be deformed.

  In this way, when the straight portion deforms following the shape of the wire harness, the pulling force for bending deformation acts on the wire harness in the routing state connected to the connection target. There was a possibility that the electrical connectivity could not be secured due to disconnection.

Japanese Patent Laid-Open No. 9-322361

  Then, this invention aims at providing the grommet which can guide a wire harness reliably along a desired wiring direction.

The present invention comprises a tubular grommet body and an inner member that is present in corner covers provided at both ends of the linear portion of the grommet body and has a shape retaining property higher than that of the grommet body, and the wire harness is inserted therethrough. a grommet, said straight portion, so as to form a circular cross-section, the longitudinal center of the cylindrical portion, is constituted by a bellows portion provided on both sides of the cylindrical portion, the inner member, the mounting holes The mounting portion to be fitted and a hollow harness guide portion having a guide space for guiding the wire harness in the bending direction, the mounting portion and the harness guide portion are configured separately, and the harness guide portion is Each of the pair of assembly guide portions includes a front part of each of the pair of assembly guide portions. The corner cover portion includes a locking portion that locks against the mounting portion, and includes a locked portion that locks the locking portion of the assembled guide portion that is assembled to the mounting portion. A strap mounting portion is provided at a position corresponding to the guide tip portion on the linear portion side of the harness guide portion, and the guide tip portion of the harness guide portion that is attached to the strap guide portion A strap is provided that is fastened and fixed to the frame .

  The strap includes not only a so-called strap but also a special material for fastening such as a tie wrap and a binding band, or a general-purpose material such as a wire or a wire, which can maintain a predetermined fastening state regardless of the shape or structure. It is a concept.

By this invention, a wire harness can be reliably guided with a grommet along a desired routing route.
More specifically, the wire harness is bent in a desired wiring direction and bent by an inner member that is present in corner cover portions provided at both ends of the linear portion of the tubular grommet body and has a shape retaining property higher than that of the grommet body. The state can be reliably maintained.

  Further, the wire harness bent in the routing direction is guided by the straight line portion along the routing direction. However, since the straight line portion is formed in a circular cross section having high cross-sectional rigidity, any direction of the cross section In contrast, the wire harness can be reliably guided without unintentionally deforming the linear portion.

  In addition, the linear portion is configured by a cylindrical portion at the center in the length direction and bellows portions provided on both sides of the cylindrical portion, that is, a bellows portion having high deformability between the cylindrical portion and the inner member. Because the bellows part is deformed along the bent shape of the wire harness bent in the routing direction by the inner member, without bending the wire harness or applying an extra load, The wire harness can be guided to the cylindrical portion.

  Furthermore, even if the wire harness guided to the cylindrical part by the bellows part is deformed by its own weight or vibration, the cylindrical part supported by the inner member having a high shape retaining property via the bellows part is And it can support reliably, without following a deformation | transformation of a wire harness.

  Specifically, the wire harness that is inserted into the grommet and bent in the wiring direction by the inner member having a high shape retaining property, and the wiring harness arranged inside the straight portion is arranged in the wiring direction by the inner member having a high shape retaining property. A simple beam structure in which both sides bent in a straight line are supported, and the center of the portion arranged inside the straight portion is most easily bent and deformed. However, the center part that is most likely to bend and deform is supported by a cylindrical part that is not easily deformed, so that it can be reliably guided without being deformed by its own weight or vibration, and pulled to the wire harness by its deformation due to its own weight or vibration. It is possible to prevent the force from acting.

  In this way, the wire harness bent in the wiring direction by the inner member is guided to the cylindrical portion by the bellows portion without applying an extra load or bending the wire harness, and the wire harness is deformed. It is possible to more reliably support the cylindrical portion that does not follow the above, and the electrical connectivity of the wire harness can be maintained.

In addition, the inner member that is present can be securely fixed to the strap mounting portion, and the effect of the straight portion as described above can be reliably realized.
If the inner member is removed from the corner cover part, the wire harness is exposed between the inner member attached to the through hole and the corner cover part, or moisture or dust enters, so that It becomes impossible to protect the wire harness inserted through the cable. On the contrary, when the inner member is disengaged in such a manner that the inner member enters the straight portion side from the corner cover portion, the bellows portion constituting the straight portion may not function sufficiently.

  On the other hand, the inner member can be securely fixed to the corner cover portion by attaching a strap that is fastened to the inner member to be fixed to the strap mounting portion. While securing dust resistance and guiding the cylindrical part by the bellows part without applying an extra load to the wire harness bent in the wiring direction by the inner member or bending the wire harness, The cylindrical portion that does not follow the deformation of the wire harness can be reliably supported, and the electrical connectivity of the wire harness can be maintained.

In addition, the wire harness can be reliably guided in a desired routing direction, and can be smoothly inserted without applying a load to the wire harness.
More specifically, according to the configuration described above, the attachment portion for attaching the inner member to the through hole formed in the partition wall and the harness guide portion for guiding the wire harness are separate components, so the wire harness is inserted. The harness guide portion that is bent and guided in a wiring direction different from the fitting direction and the mounting portion attached to the through-hole of the partition wall are combined, that is, integrated, thereby penetrating the through-hole and predetermined wiring A wire harness to be routed along a route can be smoothly bent and routed. Therefore, when the wire harness is inserted into the inner member in which the harness guide portion and the attachment portion are integrated, or the harness guide portion and the attachment portion are integrated, and the wire harness is inserted into the inner member attached to the through hole. Compared to the case, the wire harness can be bent and guided along the routing route easily and without applying an extra load.
Furthermore, the wire harness can be inserted into the harness guide part only by assembling a separate assembly guide part to the wire harness without inserting a long wire harness.

Further, the assembled state of the assembly guide part that is assembled to form the harness guide part is attached to the attachment part and can be reliably held by locking the locking part and the locked part.

As an aspect of the present invention, the cylindrical portion can be formed to be about half the length of the straight portion.
According to the present invention, an extra load is applied to the wire harness bent in the wiring direction by the inner member or the bellows part is guided to the cylindrical part without bending the wire harness, and the wire harness is deformed. Can be reliably supported by the cylindrical portion that does not follow the above, and the electrical connectivity of the wire harness can be maintained.

  Specifically, if the cylindrical portion is made longer than about half the length of the linear portion, the bellows portions arranged on both sides of the linear portion are shortened, so that the deformation allowance for conforming to the shape of the wire harness When the wire harness bent in the wiring direction by the inner member is guided to the straight portion, an excessive load may be applied to the wire harness or the wire harness may be bent. Conversely, if the cylindrical part is made shorter than about half the length of the linear part, the bellows parts arranged on both sides of the linear part become long, so along the deformation of the wire harness due to its own weight or vibration The bellows portion is deformed, that is, the entire straight portion that is difficult to deform follows the deformation of the wire harness, and the wire harness may not be reliably supported.

  In contrast, by forming the cylindrical portion to be about half the length of the linear portion, an extra load is applied to the wire harness bent in the wiring direction by the inner member. The wire harness is guided by the bellows without bending the wire harness, and is securely supported by the cylindrical portion that does not follow the deformation of the wire harness, thus ensuring the electrical connectivity of the wire harness. can do.

  By this invention, the grommet which can guide a wire harness reliably along a desired wiring direction can be provided.

The disassembled perspective view of a grommet. Explanatory drawing which shows the attachment state of a grommet. The longitudinal cross-sectional view of the edge part side of a grommet. The perspective view of an inner member. The disassembled perspective view of an inner member. Explanatory drawing by the exploded perspective view of an inner member. The structure explanatory view of an inner member. The structure explanatory view of an inner member. Explanatory drawing of the attachment procedure to the through-hole of a grommet.

  An embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 8, the grommet 1 of the present embodiment includes a tubular grommet main body 10 having an insertion hole 1H that allows the wire harness WH to be inserted, and inner members provided at both ends of the grommet main body 10. 20.

  1 shows an exploded perspective view of the grommet 1 in a state where the inner member 20 on one end side of the grommet body 10 is separated, and FIG. 2 (a) is a front view of the grommet 1 in a state where both ends are attached to the partition wall 100. FIG. 2B shows a plan view of the grommet 1 in the same state.

  FIG. 3 shows an enlarged longitudinal sectional view of the intermediate portion in the width direction W at the end of the grommet 1 in the use state, and FIG. 4 shows a perspective view of the inner member 20 viewed from diagonally right above toward the tip opening 30Ha. FIG. 5 is an exploded perspective view of the inner member 20 divided into the guide portion 30 and the attachment portion 40 and viewed from the upper left side from the side opposite to the tip opening portion 30Ha in the guide portion component 30P.

  FIG. 6A shows an exploded perspective view of the inner member 20 disassembled for each component and viewed from above, and FIG. 6B shows an exploded perspective view of the inner member 20 viewed from below. ing. FIG. 7A is a plan view of the inner member 20, FIG. 7B is an enlarged view of the X portion, and a left side view of the inner member 20 viewed from the front end opening 30Ha side. FIG. 7C shows a bottom view of the inner member 20.

  8A shows a cross-sectional view taken along line AA shown in FIG. 7A, and FIGS. 8B, 8C, and 8D show lines B1-B1 shown in FIG. 7A, respectively. , B2-B2 line, B3-B3 line, a cross-sectional view of the cross section of each part, FIG. 8 (e) shows a CC line cross-sectional view in FIG. 7 (b).

  The fitting direction Z described in the following description indicates the downward direction in FIG. 3, and the opposite side of the fitting direction Z indicates the upward direction in FIG. Further, an axis passing through the center of the inner member 20 along the fitting direction Z is defined as a central axis along the fitting direction Z.

  The grommet main body 10 has an inner member 20 through which the wire harness WH is inserted inside both ends, and is arranged at a straight portion 11 having a straight and circular cross section and at both ends in the longitudinal direction of the straight portion 11. The corner cover 12 is configured integrally with, for example, rubber or soft resin. Moreover, the linear part 11 is comprised by the cylindrical part 13 and the bellows part 14 which were arrange | positioned at the both sides of the cylindrical part 13, and formed in the bellows shape.

  In the present embodiment, for example, as shown in FIGS. 2A and 2B, the inner member 20 provided in the corner covers 12 at both ends of the grommet body 10 is fixed to a fixed partition wall such as a fixed panel in a vehicle. It is arranged so as to be fitted and attached to the edge portion 111 of the through hole 110 formed in 101 or the edge portion 111 of the through hole 110 formed in the movable partition wall 102 such as a door panel (movable panel). The grommet 1 is routed by the grommet main body 10 to protect the wire harness WH inserted through the grommet 1.

  The straight portion 11 constituting the grommet body 10 is formed in a circular shape with an orthogonal cross section orthogonal to the tube axis direction Xa in a state of being arranged along the partition wall 100 (101, 102), and is half of the straight portion 11 The cylindrical portion 13 is formed to a certain length, and the bellows portions 14 are arranged on both sides thereof. In other words, the bellows portion 14 is disposed between the cylindrical portion 13 and the corner cover 12. Although the bellows portion 14 and the cylindrical portion 13 are made of the same material and are formed with substantially the same diameter, the bellows portion 14 is more deformed than the cylindrical portion 13 due to the bellows structure.

  As shown in FIG. 3, the corner covers 12 arranged on both sides of the straight portion 11 have a substantially similar shape that is slightly larger than the inner member 20 to be included, and will be described later in the inner member 20 with the inner member 20 being sheathed. It has an open end large diameter portion 12a formed with a large diameter that can be fitted to the upper surface flange portion 43, and can be elastically contacted with the edge 111 of the through hole 110 from the entire circumferential direction of the open end large diameter portion 12a. A protruding seal lip portion 12b is provided.

  In the corner cover 12, a strap mounting groove 15 for mounting a strap 50 described later is formed at a location corresponding to the guide tip portion 33 of the guide portion 30 in the inner member 20.

  As shown in FIG. 2A, the strap attachment groove 15 is formed on the outer side in the tube axis direction Xa from the inner end portion in the tube axis direction Xa of the open end large diameter portion 12a of the corner cover 1, that is, in FIG. As shown in FIG. 5, the opening end large-diameter portion 12a is disposed on the inner side in a plan view than the outer peripheral edge.

  The inner member 20 to be included in the corner cover 12 of the grommet body 10 is fitted into the through hole 110 formed in the partition wall 100 such as a vehicle body panel and attached to the edge 111 of the through hole 110, and the wire harness WH. A guide portion 30 that guides in a bent state is assembled.

  The inner member 20 is formed in a cylindrical shape having an inner insertion hole 20H through which the wire harness WH is inserted through the attachment portion 40 and the guide portion 30, and has a shape retaining property higher than that of the grommet main body 10, for example, hard It is made of resin.

  As described above, the attachment portion 40 that constitutes the inner member 20 together with the guide portion 30 is a member for attaching the grommet 1 to the through hole 110 of the partition wall 100 as shown in FIGS. A fitting insertion portion 42 formed in a square-round rectangular tube shape so as to be fitted into the hole-shaped through hole 110, and an upper surface of the fitting insertion portion 42, and a similar shape larger than the planar shape of the fitting insertion portion 42 And the upper surface flange portion 43 formed in a bowl shape that is slightly larger in the radial direction than the through hole 110 from the upper end portion of the fitting insertion portion 42, and the attachment portion side insertion hole 40H is formed inside. Yes.

  The insertion portion 42 is directed upward so that it can be engaged with the edge portion 111 of the through-hole 110 formed in the partition wall 100 from below at locations corresponding to both ends in the major axis direction and both ends in the minor axis direction on the outer peripheral surface. And a partition engaging protrusion 44 protruding in the direction.

  The upper surface flange portion 43 has a partition wall mounting side communication port 40Hb communicating with the mounting portion side insertion hole 40H formed therein at the center in plan view, and is assembled on both sides in the width direction W of the partition wall mounting side communication port 40Hb. The inter-member engagement protrusions 31 of the guide part 30 in the state are inserted, and the inter-member engagement recesses 41 that form the inter-member engagement means 21 together with the inter-member engagement protrusions 31 are formed.

  Further, the upper surface flange portion 43 is a notch portion that is notched so as to be able to release the engagement state of the partition wall engagement projection piece 44 with respect to the edge portion 111 of the through hole 110 at a location corresponding to the partition wall engagement projection piece 44 in the circumferential direction. 45 is formed.

  As shown in FIGS. 3 and 5, the guide portion 30 that is assembled with the attachment portion 40 and constitutes the inner member 20 protrudes upward in a cylindrical shape with respect to the attachment portion 40 side, and has a substantially parallelogram shape in front view. The guide main body portion 32 and the guide front end portion 33 projecting substantially horizontally toward the front end side of the guide main body portion 32 are integrally formed, and the guide side insertion hole 30H is formed between the guide main body portion 32 and the guide front end portion 33. They communicate with each other inside.

  The guide main body 32 is eccentric so as to gradually incline toward one side in the long axis direction from the base side formed in an orthogonal cross section of a rectangular rectangle to the direction opposite to the fitting direction Z, and the length in the long axis direction. It is formed into a truncated cone shape with a gradually decreasing length and a substantially parallelogram shape when viewed from the front.

  The guide distal end portion 33 is a horizontal cylindrical shape that protrudes substantially horizontally from the upper end of the guide main body portion 32 and has a circular vertical cross section, and is formed in the strap mounting groove 15 of the grommet main body 10 on the outer periphery on the distal end side. A tightening groove 36 to be tightened by the strap 50 attached to the strap attachment groove 15 is formed at a corresponding position.

As shown in FIG. 3, the tightening groove 36 has a groove depth comparable to that of the strap mounting groove 15 formed to be slightly wider than the width of the strap 50, but about 1.5 to 2 It is formed with a width of about 0 times.
Further, as shown in FIGS. 7A and 7C, the fastening groove 36 formed at a position corresponding to the strap mounting groove 15 is formed inside the tube axis direction Xa of the upper surface flange portion 43 of the mounting portion 40. It is arranged above the notch 45 made.

  The guide part 30 configured in this way is configured by assembling two guide part components 30P having a symmetrical shape. As shown in FIG. 5, the guide component 30Pa, 30Pb connects both ends of the guide side insertion hole 30H in the hole forming direction along the inner peripheral surface of the guide side insertion hole 30H. It forms so that it may divide into 2 by the division surface F, and it forms with a pair of symmetrical shape formed so that a mutual assembly | attachment was possible.

  More specifically, the guide part component 30P is a guide part component 30Pa on one side with respect to the intermediate part in the width direction of the inner member 20 at a virtual dividing surface F along the intermediate part in the width direction W (thickness direction). And the other guide portion component 30Pb are formed of two members formed so as to be divided into two equal parts.

  As a result, the inner peripheral surface of one half of the inner peripheral surface of the guide side insertion hole 30H is included in one guide portion constituent component 30Pa of the pair of guide portion constituent components 30P constituting the guide portion 30 by assembling. The other guide portion component 30Pb is formed with the inner peripheral surface of the other half on the other side of the inner peripheral surface of the guide side insertion hole 30H.

  Further, as shown in FIGS. 6A and 6B, the pair of guide part components 30Pa and 30Pb are assembled to each other at the assembly position of the pair of guide part components 30Pa and 30Pb in the inner member 20. Inter-component engaging means 35 that engages the state is formed.

  As shown in FIGS. 6A, 6B, 8A, 8B, and 8C, the inter-component engaging means 35 has a pair of guide portion components 30Pa and 30Pb facing each other. The front end side of the guide part 30 is formed to be engageable in an assembled state in which the opposed end parts are abutted with each other.

  Further, the inter-component engaging means 35 includes an inter-component engaging protrusion 35a formed to protrude to the other side of the guide portion component 30Pa facing the guide portion component 30Pb, and a guide in the guide portion component 30Pb. In a portion facing the component component 30Pa, it is configured by an inter-component engaging recess 35b formed so as to be engageable with the inter-component engaging protrusion 35a.

  As shown in FIG. 5, the engagement portion with the attachment portion 40 in the guide portion 30 that constitutes the inner member 20 by assembling with the attachment portion 40 has an inter-member engagement recess 41 formed in the attachment portion 40. The inter-member engaging protrusions 31 and the inter-member engaging protrusions 31 and the inter-member engaging recesses 41 are attached to each other in a state where the pair of guide part components 30P are assembled to each other. Inter-member engaging means 21 that engages with 40 is configured.

  As shown in FIGS. 5, 6A, 6B, 8C, and 8D, the inter-member engaging means 21 (31, 41) is connected to the guide portion 30 and the mounting portion 40. The guide side communication is performed at a joint portion, that is, at a position opposite to the peripheral edge portion of the guide side communication port 30Hb corresponding to the lower end side of the guide portion 30 and the peripheral edge portion of the partition wall mounting side communication port 40Hb corresponding to the upper end side of the attachment portion 40. The inter-member engagement protrusions 31 are formed so as to protrude from the outer peripheral edge of the opening 30Hb to the attachment portion 40, and the inter-member engagement protrusions 31 are formed to be engageable with the peripheral edge of the partition wall attachment side communication port 40Hb. It is comprised with the engagement recessed part 41 between members.

Further, as shown in FIG. 4, the mounting portion 40 and the guide portion 30 are assembled with each other in a substantially rectangular shape with respect to the central axis along the fitting direction Z, and with a stepped shape. It is formed to become.
In addition, the said square-circle rectangular shape shows the shape formed so that the rectangular short side part swells in circular arc shape outside.

  Further, as shown in FIG. 7A, the guide portion 30 and the attachment portion 40 are arranged in the fitting direction Z in a state where they are integrally assembled by the inter-component engaging means 35 and the inter-member engaging means 21. In the orthogonal cross section orthogonal to each other, the long axes L1 and L2 are arranged so as to intersect each other at an angle θ formed by, for example, about 5 degrees.

  Accordingly, as shown in FIG. 7C, the long axes of the guide-side insertion hole 30H and the attachment-side insertion hole 40H formed in a long hole shape intersect each other at an angle θ formed by about 5 degrees. So communicate.

  3 and FIG. 8E, the guide side insertion hole 30H has a fitting direction Z in which the mounting portion 40 is fitted into the through hole 110, and a direction orthogonal to the fitting direction Z. It forms in the hole shape which can change the wiring direction of the wire harness WH between X.

  In other words, the guide side insertion hole 30 </ b> H includes a component in the fitting direction Z in which the attachment portion 40 is fitted into the through hole 110 and a component in the orthogonal direction X orthogonal to each other as the harness wiring direction in which the wire harness WH is routed. It is formed in a hole shape having

  By the said structure, the location equivalent to the guide main-body part 32 in the guide side insertion hole 30H can change the wiring direction of the wire harness WH between the component of the fitting direction Z, and the component of the orthogonal direction X orthogonal, The wire harness WH is formed in an internal space that can be guided.

  Further, since the guide tip portion 33 is formed in a cylindrical shape that protrudes toward the one side in the long axis direction from the tip portion of the guide main body portion 32 that is inclined to one side in the long axis direction, the guide side insertion hole 30H. A portion corresponding to the guide tip portion 33 is formed so that the wire harness WH can be routed in a component in the orthogonal direction X orthogonal to each other.

With the above-described configuration, the guide side insertion hole 30 </ b> H has a component capable of guiding the wire harness WH in the orthogonal direction X orthogonal to the fitting direction Z inside the guide distal end portion 33 and the guide main body portion 32. In the interior, the wire harness WH is formed in the hole forming direction having a component capable of guiding the wire harness WH in the fitting direction Z and the orthogonal direction X orthogonal to each other.
A circular tip opening 30Ha is formed at the tip of the guide tip 33.

  The inner insertion hole 20H formed in the inner member 20 configured by assembling the guide part 30 and the attachment part 40 in this way is formed between the guide side insertion hole 30H formed in the guide part 30 and the attachment part 40. The guide-side insertion hole 30H is opened at the tip opening 30Ha formed in the guide portion 30, and the attachment-side insertion hole 40H is The guide side insertion hole 30 </ b> H and the attachment part side insertion hole 40 </ b> H communicate with each other at a boundary portion (connection location) between the guide part 30 and the attachment part 40.

  A communication port that communicates with the attachment-side insertion hole 40H in the guide-side insertion hole 30H is set as a guide-side communication port 30Hb, and a communication port that communicates with the guide-side insertion hole 30H in the attachment-side insertion hole 40H. It sets to the partition attachment side communication port 40Hb (refer FIG. 3).

  When the inner member 20 configured by assembling the guide portion 30 and the mounting portion 40 configured as described above and being engaged by the inter-member engaging means 21 is disposed inside the corner cover 12 of the grommet body 10, The strap mounting groove 15 and the tightening groove 36 are in corresponding positions. In this state, by attaching the strap 50 to the strap attachment groove 15, the inner portion of the strap attachment groove 15 is reduced in diameter by the tightening pressure of the strap 50, and the guide tip portion of the guide portion 30. The guide portion 30, that is, the inner member 20 can be fixed to the corner cover 12 by biting into the tightening groove 36 formed in 33.

  As shown in FIG. 3, although the fastening groove 36 has a groove depth comparable to that of the strap mounting groove 15 formed wider than the width of the strap 50, the fastening groove 36 is about 1.5-2. Since the width is about 0.times., The inner portion of the strap mounting groove 15 that has been reduced in diameter by the tightening pressure by the strap 50 fits into the tightening groove 36 and can be fixed securely.

  Further, the strap mounting groove 15 for mounting the strap 50 is disposed on the inner side in plan view from the outer peripheral edge of the open end large diameter portion 12a, and the fastening groove 36 of the guide portion 30 is disposed at a position corresponding to the strap mounting groove 15. Therefore, the protrusion amount that protrudes obliquely upward from the upper surface flange portion 43 of the strap mounting groove 15 or the tightening groove 36 for mounting the strap 50 can be suppressed.

  Therefore, the strap mounting groove 15 and the tightening groove 36 that are supported in a cantilever state by the guide main body portion 32 with respect to the upper surface flange portion 43 are deformed along with the deformation of the bellows portion 14 of the grommet main body 10, and the strap mounting groove. It is possible to reliably prevent the strap 50 from coming off the 15.

  Subsequently, when routing the wire harness WH to the vehicle body, an example of a procedure for inserting the wire harness WH into the grommet 1 of the above-described embodiment and attaching the grommet 1 to the through hole 110 in the partition wall 100 is illustrated in FIG. 3, FIG. 8 (e) and FIG.

  FIG. 9 is an explanatory diagram for explaining a procedure for fitting the inner member 20 provided on one end side of the grommet 1 into the through hole 110 formed in the partition wall 100 in a state where the wire harness WH is inserted into the insertion hole 1H of the grommet 1. Is shown.

  However, since the procedure for attaching the inner member 20 provided to each end of the grommet body 10 to the through hole 110 is the same, the procedure for attaching the inner member 20 provided to the one end side to the through hole 110 is the same. Only the explanation will be given, and explanation of the procedure will be omitted for the other end side.

  First, the inner member 20 is separated from the corner cover 12 in the grommet body 10 in advance, and further separated into three parts, that is, a pair of guide part components 30Pa and 30Pb and a mounting part 40 (FIG. 6 (a)).

  First, as shown in FIG. 9 (a), the wire harness WH is inserted through the grommet body 10, and a pair of wire harnesses WH on both sides with respect to a portion of the wire harness WH routed from one end side to the outside of the grommet body 10 is provided. The guide part components 30Pa and 30Pb are arranged to face each other.

  From this state, the pair of guide part components 30Pa and 30Pb are brought close to each other so that the opposing ends abut each other, whereby the inter-component engaging protrusion 35a formed on one guide part component 30Pa is made the other guide. It inserts into the engagement recessed part 35b between components formed in the component component 30Pb, and it mutually engages. As a result, as shown in FIG. 9B, the guide part component 30P is assembled and integrated with each other in a state where the wire harness WH is inserted into the guide side insertion hole 30H and the wire harness WH is sandwiched. The unit 30 can be configured.

  Subsequently, the guide unit 30 configured by assembling the guide unit component 30 </ b> P is assembled to the attachment unit 40. Specifically, the guide portion 30 and the attachment portion 40 are brought close to each other, and the inter-member engagement protrusion 31 formed on the lower portion of the guide portion 30 is formed on the upper surface flange portion 43 of the attachment portion 40. The guide portion 30 and the attachment portion 40 are engaged with each other by being inserted into the recess 41. Thereby, the inner member 20 can mutually be assembled | attached integrally in the state which inserted the wire harness WH in the harness inner side insertion hole.

Then, the inner member 20 is fitted into the corner cover 12 provided with the inner member 20 on one end side of the grommet body 10. At that time, the open end large-diameter portion 12 a of the corner cover 12 is fitted to the upper surface flange portion 43 from the outside.
Accordingly, as shown in FIG. 8E, the inner member 20 can be fitted to the corner cover 12 and provided at the end of the grommet 1.

  The portion of the wire harness WH that is routed outward from the mounting portion 40 side of the inner member 20 is routed to the opposite side of the partition wall 100 through the through hole 110 (not shown). Then, by fitting the mounting portion 40 of the inner member 20 fitted to the corner cover 12 into the through hole 110 of the partition wall 100, the partition wall engaging protrusion 44 is connected to the edge of the through hole 110 as shown in FIG. 111 can be engaged, and the attachment portion 40 can be fitted into the through hole 110.

  At this time, the tip end side of the seal lip portion 12b protruding from the peripheral edge portion of the opening end large-diameter portion 12a abuts on the edge portion 111 of the through hole 110, so that the grommet 1 inside the grommet 1 is attached to the through hole 110. It is possible to ensure waterproofness and dustproofness.

  Further, as described above, in the corner cover 12 of the grommet main body 10, the guide tip 33 extends across the corner cover 12 and the bellows part 14 so that the strap mounting groove 15 and the tightening groove 36 correspond to each other. By attaching the strap 50 to the fastening groove 36 in a state where the inner member 20 is disposed, the strap attaching groove 15 portion is reduced in diameter by the fastening pressure by the strap 50, and the guide tip of the guide portion 30 The guide portion 30, that is, the inner member 20 can be fixed to the corner cover 12 by biting into the fastening groove 36 formed in the portion 33.

The effect which the grommet 1 mentioned above show | plays is demonstrated.
As described above, the grommet 1 of the embodiment and the inner member 20 provided with the grommet 1 at the end can reliably guide the wire harness WH in a desired routing direction, and load the wire harness WH. It can be inserted smoothly without putting.

  Specifically, the wire harness WH is routed in parallel along the partition wall 100, and is routed in a state in which the wire harness WH is inserted into the through hole 110 at the through hole forming portion in the partition wall 100. In the through hole forming portion, both side portions of the wire harness WH are routed in a bent state for changing the direction with respect to the insertion portion to the through hole 110 in the longitudinal direction.

  However, if the wire harness WH is routed while drawing a trajectory bent with a gentle curvature without securely bending both sides with respect to the insertion portion of the wire harness WH in the longitudinal direction, a through hole is formed. Since the wire harness WH is bulky at the location, it will hinder the space saving of the vehicle.

  In contrast, the guide portion 30 in the inner member 20 of the present embodiment particularly has the wire harness WH in the fitting direction Z in which the attachment portion 40 is fitted into the through hole 110 in the hole forming direction of the guide side insertion hole 30H. The grommet body 10 is made of rubber or soft resin, and has a hole shape having a guideable component and a component capable of guiding the wire harness WH in a direction crossing the orthogonal direction X with respect to the fitting direction Z. In addition, the inner member 20 is formed of a hard resin or the like, so that the wire harness WH can be guided so that the shape retaining property is higher than that of the grommet main body 10. .

  For this reason, even if it is a case where both side portions are bent with respect to the insertion portion to the through hole 110 in the longitudinal direction of the wire harness WH in the through hole forming portion, the bent portion does not have a large curvature in the guide portion 30. The wire harness WH can be guided in a compact manner and the wire harness WH can be routed in a compact manner so that the direction of the wire harness WH can be changed.

  In other words, the tubular grommet main body 10 and the inner member 20 that is present in the corner covers 12 provided at both ends of the linear portion 11 of the grommet main body 10 and has a shape retaining property higher than that of the grommet main body 10 are configured. The straight portion 11 of the grommet 1 that is inserted into the grommet 1 is formed in a circular cross section, and is constituted by the cylindrical portion 13 at the center in the length direction and the bellows portions 14 provided on both sides of the cylindrical portion 13, thereby providing a desired routing The wire harness WH can be reliably guided by the grommet 1 along the direction.

  Specifically, the wire harness WH is bent in a desired wiring direction by the inner member 20 that is present in the corner covers 12 provided at both ends of the linear portion 11 in the tubular grommet body 10 and has a shape retaining property higher than that of the grommet body 10. At the same time, the bent state can be reliably maintained.

  Further, the wire harness WH bent in the wiring direction is guided by the straight portion 11 along the wiring direction. However, since the straight portion 11 is formed in a circular shape having a high cross-sectional rigidity, The wire harness WH can be reliably guided without unintentionally deforming the linear portion 11 with respect to the direction.

  Further, since the straight portion 11 is constituted by the cylindrical portion 13 at the center in the length direction and the bellows portions 14 provided on both sides of the cylindrical portion 13, that is, the deformability between the cylindrical portion 13 and the inner member 20. Since the bellows portion 14 is deformed along the bent shape of the wire harness WH bent in the wiring direction by the inner member 20, the wire harness WH can be bent. The wire harness WH can be guided to the cylindrical portion 13 without applying an extra load.

  Furthermore, even if the wire harness WH guided by the bellows portion 14 to the cylindrical portion 13 is deformed due to its own weight or vibration, the wire harness WH is supported by the inner member 20 having a high shape retaining property via the bellows portion 14. The made cylindrical portion 13 can be reliably supported without following the deformation of the wire harness WH.

  Specifically, the wire harness WH that is inserted into the grommet 1 and bent in the wiring direction by the inner member 20 having a high shape-retaining property, and the inner part of the straight portion 11 has a high shape-retaining property. A simple beam structure in which both sides bent in the wiring direction by 20 are supported, and the center of the portion arranged inside the straight portion 11 is most easily bent and deformed. However, since the central part that is most likely to bend and deform is supported by the cylindrical part 13 that is not easily deformed, it can be reliably guided without being deformed by its own weight or vibration, and the wire harness WH can be guided by its deformation due to its own weight or vibration. It is possible to prevent a pulling force from acting on.

  In this manner, the wire harness WH bent in the wiring direction by the inner member 20 is guided to the cylindrical portion 13 by the bellows portion 14 without applying an extra load or bending the wire harness WH. The cylindrical portion 13 that does not follow the deformation of the wire harness WH can be reliably supported, and the electrical connectivity of the wire harness WH can be maintained.

  In addition, since the cylindrical part 13 is formed in the length of about half with respect to the length of the linear part 11, an excess load acts on the wire harness WH bent in the wiring direction by the inner member 20. The wire harness WH is guided to the cylindrical portion 13 by the bellows portion 14 without bending the wire harness WH, and can be reliably supported by the cylindrical portion 13 that does not follow the deformation of the wire harness WH. Connectivity can be maintained.

  Specifically, when the cylindrical portion 13 is made longer than about half of the length of the straight portion 11, the bellows portions 14 arranged on both sides of the straight portion 11 are shortened, so that the shape of the wire harness WH is met. When the wire harness WH bent in the wiring direction by the inner member 20 is guided to the straight portion 11, an excessive load is applied to the wire harness WH or the wire harness WH is bent. There is a risk that On the contrary, if the cylindrical portion 13 is made shorter than about half the length of the straight portion 11, the bellows portions 14 arranged on both sides of the straight portion 11 become longer, so that the wire harness WH is deformed by its own weight or vibration. The bellows part 14 is deformed along, that is, the entire straight part 11 that is difficult to deform follows the deformation of the wire harness WH, and the wire harness WH may not be reliably supported.

  On the other hand, by forming the cylindrical portion 13 to be approximately half the length of the straight portion 11, an extra load is applied to the wire harness WH bent in the wiring direction by the inner member 20. The wire harness WH is guided to the cylindrical portion 13 by the bellows portion 14 without acting or bending the wire harness WH, and reliably supported by the cylindrical portion 13 that does not follow the deformation of the wire harness WH. The electrical connectivity can be reliably maintained.

  Further, by attaching the strap 50 that is fastened and fixed to the inner member 20 in the strap attachment groove 15 provided on the straight portion 11 side of the corner cover 12, the inner member 20 that is present is securely fixed. The effect in the straight part 11 as described above can be reliably realized.

  If the inner member 20 is detached from the corner cover 12, the wire harness WH is exposed between the inner member 20 mounted in the through hole and the corner cover 12, or moisture or dust is intruded. The wire harness WH inserted through the inside cannot be protected. Conversely, when the inner member 20 is disengaged from the corner cover 12 so as to enter the straight portion 11 side, the bellows portion 14 constituting the straight portion 11 may not function sufficiently.

  On the other hand, the inner member 20 can be securely fixed to the corner cover 12 by mounting the strap 50 that is fastened and fixed to the inner member 20 in the strap mounting groove 15. The cylindrical portion 13 is formed by the bellows portion 14 without applying an extra load to the wire harness WH bent in the wiring direction by the inner member 20 or bending the wire harness WH while ensuring dust resistance. Can be reliably supported by the cylindrical portion 13 that does not follow the deformation of the wire harness WH, and the electrical connectivity of the wire harness WH can be maintained.

  In addition, the mounting portion 40 that fits into the through-hole to be attached and the hollow guide portion 30 that has the guide side insertion hole 30H that guides the wire harness WH in the bending direction, and the mounting portion 40 and the guide portion 30 are separated. The body-configured inner member 20 can reliably guide the wire harness WH in a desired wiring direction and can be smoothly inserted without applying a load to the wire harness WH.

  Specifically, according to the above-described configuration, the attachment portion 40 that attaches the inner member 20 to the through-hole formed in the partition and the guide portion 30 that guides the wire harness WH are separate components. The guide portion 30 that is bent and guided in a routing direction different from the insertion direction and the mounting portion 40 attached to the through-hole of the partition wall are combined, that is, integrated, thereby penetrating the through-hole, The wire harness WH to be routed along the route can be smoothly bent and routed.

  Therefore, when the wire harness WH is inserted into the inner member 20 in which the guide portion 30 and the attachment portion 40 are integrated, or the inner member 20 in which the guide portion 30 and the attachment portion 40 are integrated and attached to the through hole. Compared with the case where the wire harness WH is inserted through the wire harness WH, the wire harness WH can be bent and guided along the routing route easily and without applying an extra load.

  Further, since the mounting portion 40 is configured to include the mounting portion side insertion hole 40H formed linearly along the fitting direction Z, the mounting portion 40 may be configured to be divided from a plurality of components like the guide portion 30. Even if it comprises only one component, smooth insertion to attachment part side penetration hole 40H of wire harness WH is realizable.

  And since the attachment part 40 is comprised by one component, since rigidity can be improved rather than the case where a some component is assembled | attached, it is in the state inserted in the peripheral part 111 of the through-hole 110 reliably. Can be attached. Furthermore, the number of parts as the inner member 20 as a whole can be reduced to improve the efficiency of parts management.

  Moreover, the guide portion 30 is composed of a pair of guide portion components 30Pa and 30Pb. However, the guide portion 30 is not simply assembled by integrating the pair of guide portion components 30Pa and 30Pb, but is composed of one component. Thus, the inner member 20 can ensure excellent rigidity as a whole by assembling the guide part component 30P integrally with the mounting part 40 having excellent rigidity.

  Further, the inter-member engaging means 21 (31, 41) for engaging the guide portion 30 and the mounting portion 40, each of which is formed by assembling the inner member 20 with a pair of guide portion components 30Pa and 30Pb, is provided. Since the guide member 30 is formed by assembling a pair of guide part components 30Pa and 30Pb to each other by the inter-member engagement means 21, the guide part 30 is formed in the attachment part 40. By engaging with each other, the pair of guide part components 30Pa and 30Pb assembled with each other can be kept in an integrally assembled state without being separated from each other.

  Furthermore, since the guide part 30 can be kept engaged with the attachment part 40 by the inter-member engagement means 21, an integrated assembly state of the guide part 30 and the attachment part 40 can be obtained.

  Thus, by engaging the guide part 30 constituted by assembling the pair of guide part components 30Pa and 30Pb with each other by the inter-member engaging means 21, the guide part 30 and the attachment part 40 are engaged. The engagement state of two types of the engagement state between the members and the engagement state between the pair of guide part component parts 30Pa and 30Pb can be realized by one engagement means.

  Specifically, according to the inter-member engagement means 21, the inter-member engagement protrusions 31 formed on each of the pair of guide part components 30Pa and 30Pb are formed on the highly rigid attachment part 40 made of one member. The inner member 20 is composed of a plurality of parts in order to assemble the guide part 30 and the attachment part 40 by engaging with each of the pair of inter-member engaging recesses 41, but has strong integrity between the parts. doing.

  Further, the grommet 1 of the present embodiment includes the inter-component engaging means 35 (35a, 35b) that engages the pair of guide portion components 30Pa, 30Pb with each other, and the guide portion components 30Pa, 30Pb. Therefore, by releasing the engagement of the inter-component engaging means 35, the guide portion 30 can be separated at the dividing surface F for each of the guide portion constituent components 30Pa and 30Pb.

  And the wire harness WH is arrange | positioned along the hole formation direction of the guide side insertion hole 30H in the guide part 30, and each opposing edge part is pinched | interposed so that the wire harness WH may be pinched | interposed with a pair of guide part component 30Pa, 30Pb. By abutting, the pair of guide part constituent parts 30Pa and 30Pb can be engaged with each other by the inter-component engaging means 35 in a state where the wire harness WH is inserted into the guide side insertion hole 30H.

  Further, the inner member 20 is formed such that each of the guide side insertion hole 30H and the attachment portion side insertion hole 40H has an oblong shape perpendicular to the hole forming direction, and the guide side insertion hole 30H. Is formed so that the major axes L1 and L2 each having an oblong cross-sectional long hole shape intersect each other at a predetermined angle θ with respect to the attachment portion side insertion hole 40H (FIG. 7A). )reference).

  In other words, the inner member 20 is connected to the virtual arrangement line of the locking means that connects the tip opening 30Ha of the guide portion 30 to the pair of partition wall engaging protrusions 44 provided on both sides of the mounting portion 40 in the long axis direction. For example, since it is configured in a shape inclined by 5 degrees clockwise in plan view around the fitting direction Z (see FIGS. 7A and 7C), for example, on the surface of the partition wall 100, a predetermined interval is provided. The wiring direction of the wire harness WH that linearly connects the two points of the pair of through-holes 110 formed at each location separated from each other is the long axis of the through-hole 110, that is, the long axis L1 of the attachment-side insertion hole 40H. Even when it is inclined with respect to the predetermined angle θ, as described above, the long axis L2 of the guide side insertion hole 30H intersects with the long axis of the attachment portion side insertion hole 40H so as to correspond to the predetermined angle. Next, guide part 30 As a result, the wire harness WH routed outward from the guide portion 30 of the inner member 20 inserted into one through hole 110 through the tip opening 30Ha is smoothly routed toward the other through hole 110. can do.

In the correspondence between the configuration of the present invention and the embodiment, the corner cover portion of the present invention corresponds to the corner cover 12,
Similarly,
The strap mounting part corresponds to the strap mounting groove 15,
The harness guide part corresponds to the guide part 30,
The guide space corresponds to the guide side insertion hole 30H,
The assembly guide part corresponds to the guide part components 30P, 30Pa, 30Pb,
The locking portion corresponds to the inter-member engagement protrusion 31,
The locked portion corresponds to the inter-member engaging recess 41,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained.
For example, the inner member 20 is formed so that the major axis L2 of the guide side insertion hole 30H intersects the major axis L1 of the attachment portion side insertion hole 40H at an angle of 5 degrees. You may form so that it may cross | intersect at arbitrary angles according to the arrangement | positioning direction of the wire harness WH, without limiting to a corner.

  In addition, as described above, the grommet body 10 is not limited to the configuration including the corner cover 12 that covers the inner member 20. For example, the configuration in which the end portion of the straight portion 11 and the inner member 20 are directly connected, and the like. If it is the structure provided with the inner member 20 in the edge part side of the grommet main body 10, it will not specifically limit. Furthermore, the grommet main body 10 is not limited to the configuration in which the linear portion 11 and the corner cover 12 are integrally connected, and may be configured in such a manner that each is formed separately and the connection end portions are connected to each other.

Furthermore, although the guide part 30 is divided into two parts and configured with a pair of guide part components 30Pa and 30Pb, the guide part 30 may be divided into three or more members.
The inter-member engagement means 21 forms the inter-member engagement protrusion 31 on the guide component 30P and the inter-member engagement recess 41 on the mounting portion 40, but is not limited to this configuration. The guide part 30 and the attachment part 40 may form the inter-member engagement protrusions 31 and the inter-member engagement concave parts 41 in reverse.

  Similarly, the inter-component engaging means 35 forms an inter-component engaging protrusion 35a on one guide portion component 30Pa and forms an inter-component engaging recess 35b on the other guide portion component 30Pb. However, the present invention is not limited to this configuration, and the inter-component engaging protrusion 35a and the inter-component engaging recess 35b are formed in the reverse manner by one guide portion component 30Pa and the other guide portion component 30Pb. Also good.

DESCRIPTION OF SYMBOLS 1 ... Grommet 10 ... Grommet main body 11 ... Linear part 12 ... Corner cover 13 ... Cylindrical part 14 ... Bellows part 15 ... Strap mounting groove 20 ... Inner member 30 ... Guide part 30H ... Guide side insertion hole 30P, 30Pa, 30Pb ... Guide part Component 31 ... Inter-member engagement protrusion 40 ... Mounting portion 41 ... Inter-member engagement recess 50 ... Strap WH ... Wire harness

Claims (2)

A grommet that is formed by a tubular grommet main body and an inner member that is present in corner covers provided at both ends of the linear portion of the grommet main body and has a shape retaining property higher than that of the grommet main body. ,
The straight portion, so as to form a circular cross section, is composed of a longitudinal center of the cylindrical portion, the bellows portion provided on both sides of the cylindrical portion,
The inner member is
It is composed of an attachment part that fits into the through hole to be attached, and a hollow harness guide part that has a guide space that guides the wire harness in the bending direction,
The mounting portion and the harness guide portion are configured separately.
The harness guide portion is
It is composed of a pair of assembly guide parts divided into two parts to be assembled to the guide space,
Each of the pair of assembling guide portions is provided with a locking portion that locks against the mounting portion, and the locking portion of the mounting guide portion that is assembled to the mounting portion is locked. To be engaged,
In the corner cover portion, a strap attachment portion is provided at a position corresponding to the guide tip portion on the linear portion side of the harness guide portion that is present, and the strap cover portion is attached to the harness guide portion. A grommet provided with a strap that is fastened and fixed to the distal end portion of the guide . The grommet according to claim 1, wherein the cylindrical portion is formed to have a length that is about half of the length of the linear portion.

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