JP7648450B2 - Grommet with protector and wire harness - Google Patents

Description

The present invention relates to a grommet with a protector and a wire harness.

As a conventional wire harness mounted on a vehicle, for example, Patent Document 1 describes a wire harness that includes a connector shell that is provided in a connector housing and through which electric wires are inserted, a grommet that is connected to the connector shell, and a cable tie that is tied to a band attachment portion at the connection point between the grommet and the connector shell.

International Publication No. 2016/153045

In the wire harness described in the above-mentioned Patent Document 1, for example, a protector that protects the electric wires may be connected to a grommet, and the connection between the grommet and the protector may be tied and connected with a cable tie. In this case, it is desirable to maintain a proper connection state at the connection between the grommet and the protector.

Therefore, the present invention has been made in consideration of the above, and aims to provide a grommet with protector and a wire harness that can properly connect the grommet and the protector.

In order to solve the above-mentioned problems and achieve the object, the grommet with protector according to the present invention includes a grommet formed in an annular shape, which fits into an opening formed in an attachment target to waterproof the opening, and through which a wiring material is inserted, a protector connected to the grommet and through which the wiring material extending from the grommet is inserted, a linear portion formed in a linear shape, and a head portion for engaging the linear portion, and the linear portion wound around the grommet and the protector is engaged by the head portion. and a cable tie for binding the grommet and the protector together, the grommet includes a grommet body portion that fits into the opening to seal water, and a grommet connection portion that is formed integrally with the grommet body portion and has an annular shape, the wiring material is inserted inside the grommet body portion and the grommet connection portion, the protector includes a protector body portion that is exteriorized by the wiring material, and a protector connection portion that is formed integrally with the protector body portion and has an annular shape, The wiring material is inserted from the inside across the grommet main body and the protector connection portion, the grommet connection portion includes a plurality of through holes provided at intervals along the circumferential direction, and a first protruding wall provided at intervals along the circumferential direction with respect to a first through hole among the plurality of through holes and protruding from an outer circumferential surface of the grommet connection portion, the protector connection portions are provided at intervals along the circumferential direction, each protruding from the outer circumferential surface of the protector connection portion, and the cable tie is disposed on the inside. The grommet and the protector are characterized in that the grommet and the protector have the multiple band insertion parts inserted into the corresponding through holes, and the linear part of the cable tie is inserted across the multiple band insertion parts and engaged with the head, thereby binding and connecting the grommet connection part and the protector connection part, and the head of the cable tie is sandwiched and held between the band insertion part inserted into the first through hole and the first protruding wall.

The wire harness according to the present invention includes a conductive wiring material, a grommet formed in a ring shape and fitted into an opening formed in an attachment object to waterproof the opening, the wiring material being inserted into the inside, a protector connected to the grommet and extending from the grommet and into which the wiring material is inserted, a linear portion formed in a line shape, and a head portion for engaging the linear portion, and the linear portion wound around the grommet and the protector is engaged by the head portion to connect the grommet and the protector to the front. and a cable tie for binding the protector, the grommet includes a grommet body portion that fits into the opening to seal water, and a grommet connection portion that is formed integrally with the grommet body portion and in an annular shape, the wiring material is inserted inside the grommet body portion and the grommet connection portion, the protector includes a protector body portion that is exteriorized by the wiring material, and a protector connection portion that is formed integrally with the protector body portion and in an annular shape, and the protector body portion and the protector connection portion, the routing material is inserted inside from the grommet connection portion, the grommet connection portion includes a plurality of through holes spaced apart along the circumferential direction, and a first protruding wall spaced apart along the circumferential direction with respect to a first through hole of the plurality of through holes and protruding from an outer circumferential surface of the grommet connection portion, the protector connection portion includes a plurality of band insertion portions spaced apart along the circumferential direction, each protruding from the outer circumferential surface of the protector connection portion, and through which the cable tie is inserted inside, the grommet and the protector are characterized in that the plurality of band insertion portions are inserted into the corresponding through holes, and a linear portion of the cable tie is inserted across the plurality of band insertion portions and engaged with the head, thereby bundling and connecting the grommet connection portion and the protector connection portion, and the head of the cable tie is sandwiched and held between the band insertion portion inserted into the first through hole and the first protruding wall.

The grommet with protector and wire harness of the present invention prevent the head of the cable tie from moving in the circumferential direction by being held between the band insertion portion and the first protruding wall, and as a result, the grommet and protector can be properly connected.

FIG. 1 is a perspective view showing a configuration example of a wire harness according to an embodiment. FIG. 2 is a perspective view showing an example of the configuration of a grommet with a protector before being bound by a binding band according to the embodiment. FIG. 3 is an exploded perspective view illustrating a configuration example of a grommet according to the embodiment. FIG. 4 is a perspective view showing an example of the configuration of the protector according to the embodiment.

The form (embodiment) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to the contents described in the following embodiment. Furthermore, the components described below include those that a person skilled in the art can easily imagine and those that are substantially the same. Furthermore, the configurations described below can be appropriately combined. Furthermore, various omissions, substitutions, or modifications of the configurations can be made without departing from the gist of the present invention.
[Embodiment]

A grommet 1 with a protector and a wire harness WH according to an embodiment will be described with reference to the drawings. The grommet 1 with a protector is incorporated into a wire harness WH that is wired in a vehicle or the like. Here, the wire harness WH is configured such that, for example, a plurality of wiring materials W used for power supply and signal communication are connected to each device by a connector or the like in order to connect each device mounted on a vehicle. The wire harness WH includes a wiring material W having conductivity, a grommet 10 provided on the wiring material W and through which the wiring material W is inserted, a protector 20 that protects the wiring material W, and a cable tie 30 that ties together the connection part P between the grommet 10 and the protector 20. The wire harness WH may further include various components such as an exterior member such as a corrugated tube or a resin tape, an electrical connection box, and a fixing device. The wiring material W is, for example, composed of an electric wire. An electric wire is a conductor (core) made of multiple conductive metal wires, the outside of which is covered with an insulating coating. A wire harness WH bundles and aggregates multiple wiring materials W, and various devices are electrically connected via connectors or the like provided at the ends of the bundled wiring materials W.

The grommet 10 will be described. The grommet 10 is applied to an opening Ma formed in a connector box M to which the grommet 10 is to be attached when wiring material W is routed from the inside to the outside of the connector box M through the opening Ma. Here, the connector box M is, for example, a device that aggregates and connects a plurality of connectors provided at the ends of the wiring material W of the wire harness WH to the connectors of each device of the vehicle. The grommet 10 is inserted into the wiring material W of the wire harness WH and is fitted to the opening Ma in a state where it is sheathed around the wiring material W, thereby protecting the wiring material W passing through the opening Ma and waterproofing the opening Ma. In addition to waterproofing the opening Ma, the grommet 10 also has functions such as dustproofing and soundproofing. The configuration of the grommet 10 will be described in detail below with reference to each figure.

In the following description, for convenience, the first direction is referred to as the "axial direction X", the second direction is referred to as the "width direction Y", and the third direction is referred to as the "height direction Z" among the first, second, and third directions that intersect with each other. The axial direction X, the width direction Y, and the height direction Z intersect with each other and are typically perpendicular to each other. Here, the axial direction X corresponds to the plate thickness direction of the mounting plate of the connector box M in which the opening Ma is provided, and corresponds to the insertion direction of the wiring material W and the grommet 10 relative to the opening Ma. In other words, the axial direction X is a direction along the extension direction of the wiring material W inserted into the grommet 10. The width direction Y and the height direction Z correspond to the extension direction of the mounting plate of the connector box M in which the opening Ma is provided. In addition, the circumferential direction R is a direction along the axis of the annular member formed around the axis along the axial direction X. In other words, the circumferential direction R is a direction along the outer circumferential surface of the annular member. For ease of understanding, the wiring material W is described as being linearly wired along the axial direction X, but this is not limiting, and the wiring material W inserted into the grommet 10 may be partially bent or curved so as to deviate from the axial direction X when the grommet 10 is attached to the mounting plate of the connector box M. Furthermore, unless otherwise specified, the directions used in the following description are described as directions when the grommet 10 is assembled to the mounting plate of the connector box M and fixed to the vehicle.

As shown in FIG. 3, the grommet 10 of this embodiment includes a grommet body 11, a grommet connection portion 12, and a connecting portion 13, which are integrally formed as an elastic body.

The grommet body 11 fits into the opening Ma of the mounting plate of the connector box M to provide a watertight seal, and includes a grommet inner 11a and a watertight portion 11b.

The grommet inner 11a is made of a hard synthetic resin material having insulating properties, is harder than the water stop part 11b, and is fitted to the water stop part 11b with the wiring material W inserted inside. The grommet inner 11a is formed in a substantially cylindrical shape penetrating along the axial direction X, and is formed in an elliptical shape whose length in the width direction Y is longer than its length in the height direction Z when viewed from the axial direction X. The grommet inner 11a includes a first insertion part 110a and a second insertion part 110b inside the grommet inner 11a. The first insertion part 110a and the second insertion part 110b are arranged side by side along the width direction Y, and the wiring material W is inserted into each of them. That is, the inner space of the grommet inner 11a is divided into the first insertion portion 110a and the second insertion portion 110b, and the wiring material W can be held in a state where the wiring material W is inserted into each divided area. The first insertion portion 110a is formed in a cylindrical shape when viewed from the axial direction X, and is configured to include a first semi-cylindrical part formed in a semi-cylindrical shape and a second semi-cylindrical part formed in a semi-cylindrical shape, and the first semi-cylindrical part and the second semi-cylindrical part can be separated. The first insertion portion 110a arranges the wiring material W inside in a state where the first semi-cylindrical part and the second semi-cylindrical part are separated, and the wiring material W is inserted inside by combining the separated first semi-cylindrical part and the second semi-cylindrical part. The second insertion portion 110b is configured in the same manner as the first insertion portion 110a. That is, the second insertion portion 110b is formed in a cylindrical shape when viewed from the axial direction X, and is configured to include a first semi-cylindrical part formed in a semi-cylindrical shape and a second semi-cylindrical part formed in a semi-cylindrical shape, and the first semi-cylindrical part and the second semi-cylindrical part can be separated. The second insertion portion 110b has the wiring material W arranged inside when the first semi-cylindrical part and the second semi-cylindrical part are separated, and the wiring material W is inserted inside by combining the separated first semi-cylindrical part and the second semi-cylindrical part. The grommet inner 11a configured in this manner is attached to the inside of the water stop part 11b with the wiring material W inserted and held therein. As a result, the grommet main body 11 can properly hold the wiring material W via the grommet inner 11a.

The water stop portion 11b is formed as an elastic body and is formed to have relatively high flexibility compared to the grommet inner 11a. In this example, the water stop portion 11b is formed integrally with the grommet connection portion 12 and the connection portion 13 described later by a soft material, for example, synthetic rubber. The water stop portion 11b is formed in a substantially cylindrical shape penetrating along the axial direction X, and is formed in an elliptical shape whose length in the width direction Y is longer than its length in the height direction Z when viewed from the axial direction X. The water stop portion 11b accommodates the grommet inner 11a in its internal space G. The water stop portion 11b stops water from entering the opening Ma of the connector box M, and includes a flat portion 111b and a groove portion 112b. The flat portion 111b is formed on one side of the height direction Z on the outer circumferential surface of the water stop portion 11b, and is formed linearly along the width direction Y. The groove portion 112b is formed in a groove shape and is formed along the circumferential direction R on the outer peripheral surface of the water-stopping portion 11b, with one end connected to one side of the flat portion 111b and the other end connected to the other side of the flat portion 111b. In other words, the flat portion 111b and the groove portion 112b are formed in a ring shape on the outer peripheral surface of the water-stopping portion 11b along the circumferential direction R. The flat portion 111b and the groove portion 112b are abutted against the opening Ma of the connector box M to water-stop the opening Ma.

The grommet connection portion 12 is connected to the protector 20, and is formed as an elastic body, and is formed to have relatively high flexibility compared to the grommet inner 11a, and is formed of a soft material, such as synthetic rubber, as described above. The grommet connection portion 12 is provided on one side of the grommet main body portion 11, for example, on the opposite side of the grommet main body portion 11 in the axial direction X, and in this example, is provided on the opposite side of the grommet main body portion 11 via the connecting portion 13. The grommet connection portion 12 is formed integrally with the grommet main body portion 11 and in a ring shape, and is formed, for example, in a substantially cylindrical shape penetrating along the axial direction X, and is formed in an elliptical shape whose length in the width direction Y is longer than its length in the height direction Z when viewed from the axial direction X. The grommet connection portion 12 has an outer peripheral surface 12d formed from a pair of flat portions 120d formed in a flat shape facing each other along the height direction Z, and a pair of curved portions 121d formed in a curved shape facing each other along the width direction Y. The grommet connection portion 12 includes a plurality of through holes 12a, a pair of first protruding walls 12b, and a pair of second protruding walls 12c.

The multiple through holes 12a are holes that penetrate the main body of the grommet connection part 12, and each has the same shape and is formed in a shape that allows the band insertion part 22a described later to be inserted. In other words, the multiple through holes 12a are formed in a shape equivalent to the outer shape of the band insertion part 22a when viewed from the height direction Z or width direction Y. This allows the multiple through holes 12a to suppress rattling of the inserted band insertion part 22a. The multiple through holes 12a are provided at intervals along the circumferential direction R of the grommet connection part 12. In this example, four through holes 12a are formed, one each in the pair of flat parts 120d of the grommet connection part 12 and one each in the pair of curved parts 121d. The through holes 12a formed in the pair of flat surface portions 120d are formed in the approximate center of the flat surface portion 120d in the width direction Y and face each other along the height direction Z, and the through holes 12a formed in the pair of curved surface portions 121d face each other along the width direction Y.

The pair of first protruding walls 12b are formed in a plate shape protruding from the outer peripheral surface 12d of the grommet connection portion 12. The pair of first protruding walls 12b are provided at intervals along the circumferential direction R with respect to the first through hole 120a, which is one of the multiple through holes 12a. In this example, the pair of first protruding walls 12b are provided adjacent to the first through hole 120a formed in one curved surface portion 121d at intervals along the circumferential direction R and protrude from the outer peripheral surface 12d along the width direction Y. The pair of first protruding walls 12b are formed in a plate shape perpendicular to the height direction Z. The interval between the first through hole 120a and the pair of first protruding walls 12b is the same length as the length of the head 32 of the cable tie 30 described later (the length for holding the head 32). The pair of first protruding walls 12b are provided facing each other along the axial direction X, with one first protruding wall 12b and the other first protruding wall 12b spaced apart. This space is for holding the head 32 of the cable tie 30 and for inserting the linear portion 31 of the cable tie 30 between the one first protruding wall 12b and the other first protruding wall 12b.

The pair of second protruding walls 12c are formed in a plate shape protruding from the outer peripheral surface 12d of the grommet connection portion 12. The pair of second protruding walls 12c are provided between the first through hole 120a and the pair of first protruding walls 12b, protruding from the outer peripheral surface 12d of the grommet connection portion 12, and facing each other along the axial direction X of the grommet connection portion 12. In this example, the pair of second protruding walls 12c are provided between the first through hole 120a formed in one curved surface portion 121d and the pair of first protruding walls 12b, and protruding from the outer peripheral surface 12d of the grommet connection portion 12 along the width direction Y. The pair of second protruding walls 12c are formed in a plate shape perpendicular to the axial direction X and connected to the pair of first protruding walls 12b. For example, one second protruding wall 12c is connected to one first protruding wall 12b, and the other second protruding wall 12c is connected to the other first protruding wall 12b. The pair of second protruding walls 12c and the pair of first protruding walls 12b, which are connected to each other, are each formed in an L-shape when viewed from the width direction Y. This allows the grommet connection portion 12 to have higher strength of the pair of first protruding walls 12b and the pair of second protruding walls 12c compared to when the pair of first protruding walls 12b and the pair of second protruding walls 12c are separated.

The connecting portion 13 connects the grommet body 11 and the grommet connection portion 12, and is formed as an elastic body and is formed to have relatively high flexibility compared to the grommet inner 11a, and is formed of a soft material, such as synthetic rubber, as described above. The connecting portion 13 is formed in a ring shape, for example, in a substantially cylindrical shape penetrating along the axial direction X, and is formed in an elliptical shape whose length in the width direction Y is longer than its length in the height direction Z when viewed from the axial direction X. The connecting portion 13 connects the grommet body 11 and the grommet connection portion 12, and the wiring material W is inserted inside. In the grommet 10 configured as described above, the wiring material W is inserted inside via the connecting portion 13 across the grommet body 11 and the grommet connection portion 12.

Next, the protector 20 will be described. The protector 20 protects the wiring material W and regulates the wiring path of the wiring material W. As shown in FIG. 4, the protector 20 includes a protector main body 21 and a protector connection part 22, which are made of a hard synthetic resin material having insulating properties.

The protector main body 21 is fitted to the wiring material W, and the wiring material W extending from the protector connection portion 22 is inserted inside to protect the inserted wiring material W and regulate the wiring path. The protector main body 21 is formed in a box shape and has a fixing portion 21a. The fixing portion 21a fixes the protector 20 to a vehicle panel provided on the vehicle, and has protruding pieces protruding on both sides along the width direction Y, and this protruding piece has a hole portion. The fixing portion 21a fixes the protector 20 to the vehicle panel by inserting a bolt into the hole portion and screwing it together with the vehicle panel. The protector main body 21 formed in a box shape sends out the wiring material W inserted from the protector connection portion 22 from a sending portion (opening) on the opposite side to the protector connection portion 22.

The protector connection portion 22 is connected to the grommet connection portion 12 of the grommet 10. The protector connection portion 22 is provided on one side of the protector body portion 21, for example, on the opposite side of the delivery portion of the protector body portion 21 in the axial direction X. The protector connection portion 22 is formed integrally with the protector body portion 21 in an annular shape, for example, formed in a substantially cylindrical shape penetrating along the axial direction X, and formed in an elliptical shape whose length in the width direction Y is longer than its length in the height direction Z when viewed from the axial direction X. The outer peripheral surface 22b of the protector connection portion 22 is formed from a pair of flat portions 220b formed in a flat shape facing each other along the height direction Z, and a pair of curved portions 221b formed in a curved shape facing each other along the width direction Y. The protector connection portion 22 includes a plurality of band insertion portions 22a.

The multiple band insertion parts 22a are U-shaped (arch-shaped, gate-shaped) through which the cable ties 30 are inserted. The multiple band insertion parts 22a are spaced apart from one another along the circumferential direction R, and each protrudes from the outer circumferential surface 22b of the protector connection part 22. In this example, four band insertion parts 22a are formed, one on each of the pair of flat parts 220b of the protector connection part 22, and one on each of the pair of curved parts 221b. The band insertion parts 22a formed on the pair of flat parts 220b are formed approximately at the center of the flat part 220b in the width direction Y and face each other along the height direction Z, and the band insertion parts 22a formed on the pair of curved parts 221b face each other along the width direction Y. The multiple band insertion parts 22a are inserted into the corresponding through holes 12a, and the cable ties 30 are inserted into the multiple band insertion parts 22a. The protector 20 configured as described above has the wiring material W inserted inside, spanning the protector connection part 22 and the protector main body part 21. In this example, the protector 20 is composed of a tray 20b and a cover 20a that covers the upper part of the tray 20b, and is configured by combining the tray 20b and the cover 20a, but is not limited to this and may have other configurations.

Next, the cable tie 30 will be described. The cable tie 30 is used to tie together the connection part P between the grommet 10 and the protector 20. As shown in FIG. 1, the cable tie 30 includes a linear part 31 and a head part 32.

The linear portion 31 is formed linearly and has multiple grooves formed along the extension direction. The head 32 is provided at one end of the linear portion 31 and includes an insertion opening through which the linear portion 31 is inserted from the other end of the linear portion 31, and a claw portion that engages with the groove of the linear portion 31 inserted from the insertion opening. The cable tie 30 has the linear portion 31 inserted across multiple band insertion portions 22a and wound around the grommet connection portion 12 and the protector connection portion 22, and the groove of the linear portion 31 is engaged with the claw portion of the head 32 to tie the grommet connection portion 12 and the protector connection portion 22 together.

Next, a method of assembling the grommet 10 and the protector 20 to form the wire harness 100 will be described. The worker inserts the wiring material W into the inside of the grommet inner 11a, and attaches the grommet inner 11a with the wiring material W inserted therethrough to the inside of the watertight portion 11b. Then, with the wiring material W inserted into the inside of the protector 20, the worker connects the protector connection portion 22 and the grommet connection portion 12. At this time, the worker inserts the multiple band insertion portions 22a of the protector connection portion 22 into the multiple through holes 12a of the grommet connection portion 12, respectively. Then, with the head 32 of the cable tie 30 sandwiched and held between the first protruding wall 12b and the band insertion portion 22a, and with the head 32 of the cable tie 30 sandwiched and held between the pair of second protruding walls 12c, the worker inserts the linear portion 31 of the cable tie 30 into each of the band insertion portions 22a, engages the inserted linear portion 31 with the head 32, and ties the grommet connection portion 12 and the protector connection portion 22 together to form the wire harness 100.

As described above, the grommet with protector 1 according to the embodiment includes the grommet 10, the protector 20, and the cable tie 30. The grommet 10 is formed in a ring shape and fits into the opening Ma formed in the connector box M to waterproof the opening Ma, and the wiring material W is inserted inside. The protector 20 is connected to the grommet 10, and the wiring material W extending from the grommet 10 is inserted inside. The cable tie 30 includes a linear portion 31 formed in a linear shape and a head portion 32 that engages the linear portion 31, and the head portion 32 engages the linear portion 31 wound around the grommet 10 and the protector 20 to bind the grommet 10 and the protector 20. Here, the grommet 10 includes a grommet body 11 that fits into the opening Ma to stop water, and a grommet connection part 12 that is formed integrally with the grommet body 11 in an annular shape, and a wiring material W is inserted inside the grommet body 11 and the grommet connection part 12. The protector 20 includes a protector body 21 that is sheathed by the wiring material W, and a protector connection part 22 that is formed integrally with the protector body 21 in an annular shape, and a wiring material W is inserted inside the protector body 21 and the protector connection part 22. The grommet connection part 12 includes a plurality of through holes 12a that are provided at intervals along the circumferential direction R, and a first protruding wall 12b that is provided adjacent to a first through hole 120a of the plurality of through holes 12a at an interval along the circumferential direction R and protrudes from an outer circumferential surface 12d of the grommet connection part 12. The protector connection portion 22 includes a plurality of band insertion portions 22a that are provided at intervals along the circumferential direction R, each protruding from the outer peripheral surface 22b of the protector connection portion 22, and through which the cable tie 30 is inserted. In this configuration, the grommet 10 and the protector 20 have the plurality of band insertion portions 22a inserted into the corresponding through holes 12a, and the linear portion 31 of the cable tie 30 is inserted across the plurality of band insertion portions 22a and engaged with the head portion 32, thereby binding and connecting the grommet connection portion 12 and the protector connection portion 22, and the head portion 32 of the cable tie 30 is sandwiched and held between the band insertion portion 22a inserted into the first through hole 120a and the first protruding wall 12b.

With this configuration, the grommet 1 with protector can firmly connect the protector 20 and the grommet 10 by inserting the multiple band insertion parts 22a into the multiple through holes 12a. In addition, the grommet 1 with protector can suppress the movement of the head 32 of the cable tie 30 along the circumferential direction R by sandwiching and holding the head 32 of the cable tie 30 between the band insertion part 22a and the first protruding wall 12b. As a result, the grommet 1 with protector can suppress the head 32 of the cable tie 30 from moving and contacting the surrounding parts, and can suppress friction between the cable tie 30 and the grommet connection part 12 due to the movement of the cable tie 30, thereby suppressing a decrease in durability. In addition, the grommet 1 with protector can improve the durability of the grommet 10 by providing the first protruding wall 12b on the grommet 10 compared to the case where the first protruding wall 12b is provided on the protector 20. This is because, if the first protruding wall 12b is provided on the protector 20, a through hole for inserting the first protruding wall 12b of the protector 20 must be provided on the grommet 10 separately, and in this case, the durability of the grommet 10 may be reduced due to an increase in the number of through holes in the grommet 10. The grommet 1 with protector can improve workability by providing the first protruding wall 12b on the grommet 10, compared to a case in which the first protruding wall 12b is provided on the protector 20. This is because, if the first protruding wall 12b is provided on the protector 20, the first protruding wall 12b of the protector 20 must be inserted into the through hole of the grommet 10, and in this case, the number of work steps increases, and therefore the workability may be reduced. The grommet 1 with protector has the cable tie 30 inserted through the multiple band insertion portions 22a, so the work of fixing the position of the cable tie 30 with tape can be omitted. As a result of the above, the grommet with protector 1 can properly connect the grommet 10 and the protector 20.

In the grommet 1 with protector, the grommet connection portion 12 is provided between the first through hole 120a and the first protruding wall 12b, protrudes from the outer peripheral surface 12d of the grommet connection portion 12, and includes a pair of second protruding walls 12c that face each other along the axial direction X of the grommet connection portion 12. In the grommet 10 and the protector 20, the multiple band insertion portions 22a are inserted into the corresponding through holes 12a, and the linear portion 31 of the cable tie 30 is inserted across the multiple band insertion portions 22a and engaged with the head 32, thereby binding the grommet connection portion 12 and the protector connection portion 22, and the head 32 of the cable tie 30 is sandwiched and held by the pair of second protruding walls 12c. With this configuration, the grommet 1 with protector can hold the head 32 of the cable tie 30 with a pair of second protruding walls 12c, so that when the cable tie 30 is tied to the grommet connection part 12 and the protector connection part 22, the head 32 of the cable tie 30 can be prevented from shifting along the axial direction X, improving the workability of the tying operation.

The wire harness WH includes a conductive wiring material W and a grommet 1 with a protector, and has the same effect as the grommet 1 with a protector described above.

In the above description, the grommet 10 is applied to the opening Ma of the connector box M when wiring the wiring material W between the inside and outside of the connector box M, but the present invention is not limited to this example. The grommet 10 may be applied to an opening formed in a mounting panel, which is a metal plate that constitutes the body of a vehicle, for example.

An example has been described in which the grommet connection portion 12 includes a pair of second protruding walls 12c, but this is not limited thereto, and the grommet connection portion 12 does not have to include a pair of second protruding walls 12c.

The first through hole 120a, in which a pair of first protruding walls 12b and a pair of second protruding walls 12c are spaced apart, is described as being formed in one of the curved surface portions 121d, but is not limited thereto and may be formed, for example, in one of the pair of flat surface portions 12d.

The shapes of the grommet 10 and protector 20 described above are merely examples and are not limited to the shapes described above.

1 Grommet with protector 10 Grommet 11 Grommet body 12 Grommet connection portion 12a Multiple through holes 12d Outer circumferential surface 120a First through hole 12b First protruding wall 12c Pair of second protruding walls 20 Protector 21 Protector body 22 Protector connection portion 22a Multiple band insertion portions 22b Outer circumferential surface 30 Cable tie 31 Linear portion 32 Head M Connector box (mounting object)
Ma Opening R Circumferential direction W Wiring material WH Wire harness

Claims (3)

A grommet formed in a ring shape, fitted into an opening formed in the attachment target to waterproof the opening, and through which a wiring material is inserted;
A protector connected to the grommet and into which the wiring material extending from the grommet is inserted;
a cable tie including a linear portion formed in a linear shape and a head portion for engaging the linear portion, the cable tie engaging the linear portion wound around the grommet and the protector with the head portion to bind the grommet and the protector,
The grommet is
A grommet body portion that fits into the opening to seal against water;
a grommet connection portion formed integrally with the grommet body portion and having an annular shape, the wiring material being inserted through the grommet body portion and the grommet connection portion,
The protector comprises:
A protector main body that is sheathed on the wiring material;
a protector connection portion formed integrally with the protector body portion and having an annular shape, the wiring material being inserted through the protector body portion and the protector connection portion,
The grommet connection portion is
A plurality of through holes spaced apart along a circumferential direction;
a first protruding wall that is spaced apart from the first through hole along the circumferential direction and protrudes from an outer circumferential surface of the grommet connection portion with respect to the first through hole among the plurality of through holes,
The protector connection portion is
a plurality of band insertion portions provided at intervals along the circumferential direction, each protruding from an outer circumferential surface of the protector connection portion, and into which the cable tie is inserted;
The grommet and the protector are characterized in that the multiple band insertion portions are inserted into the corresponding through holes, and the linear portion of the cable tie is inserted across the multiple band insertion portions and engaged with the head, thereby bundling and connecting the grommet connection portion and the protector connection portion, and the head of the cable tie is held by being sandwiched between the band insertion portion inserted into the first through hole and the first protruding wall. the grommet connection portion includes a pair of second protruding walls that are provided between the first through hole and the first protruding wall, protrude from an outer circumferential surface of the grommet connection portion, and face each other along an axial direction of the grommet connection portion,
The grommet with protector as described in claim 1, wherein the grommet and the protector are in a state in which the multiple band insertion portions are inserted into the corresponding through holes, and the linear portion of the cable tie is inserted across the multiple band insertion portions and engaged with the head, thereby binding and connecting the grommet connection portion and the protector connection portion, and the head of the cable tie is held by being sandwiched between the pair of second protruding walls. A wiring material having electrical conductivity;
A grommet formed in an annular shape, fitted into an opening formed in an attachment target to waterproof the opening, and into which the wiring material is inserted;
A protector connected to the grommet and into which the wiring material extending from the grommet is inserted;
a cable tie including a linear portion formed in a linear shape and a head portion for engaging the linear portion, the cable tie engaging the linear portion wound around the grommet and the protector with the head portion to bind the grommet and the protector,
The grommet is
A grommet body portion that fits into the opening to seal against water;
a grommet connection portion formed integrally with the grommet body portion and having an annular shape, the wiring material being inserted through the grommet body portion and the grommet connection portion,
The protector comprises:
A protector main body that is sheathed on the wiring material;
a protector connection portion formed integrally with the protector body portion and having an annular shape, the wiring material being inserted through the protector body portion and the protector connection portion,
The grommet connection portion is
A plurality of through holes spaced apart along a circumferential direction;
a first protruding wall that is spaced apart from the first through hole along the circumferential direction and protrudes from an outer circumferential surface of the grommet connection portion with respect to the first through hole among the plurality of through holes,
The protector connection portion is
a plurality of band insertion portions provided at intervals along the circumferential direction, each protruding from an outer circumferential surface of the protector connection portion, and into which the cable tie is inserted;
The grommet and the protector are in a state in which the multiple band insertion portions are inserted into the corresponding through holes, and the linear portion of the cable tie is inserted across the multiple band insertion portions and engaged with the head, thereby bundling and connecting the grommet connection portion and the protector connection portion, and the head of the cable tie is held by being sandwiched between the band insertion portion inserted into the first through hole and the first protruding wall.

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