JP7558845B2 - Grommets and grommet installation methods - Google Patents

Description

This invention relates to a grommet that protects a wire harness that is routed across a through hole in the vehicle body and a through hole in the back door in a vehicle such as an automobile, and a method for installing the grommet.

For example, in a vehicle such as an automobile, when a wire harness is routed across a first through hole provided in a first panel such as a door and a second through hole provided in a second panel such as the body, the wire harness is routed by being inserted through a hollow grommet.

For example, as disclosed in Patent Document 1, a grommet of this type is known that is composed of a vehicle body side mounting part (large diameter cylindrical part) that is attached to a through hole in the vehicle body, a door side mounting part (large diameter cylindrical part) that is attached to a through hole in the back door, and a grommet main body (small diameter cylindrical part) that connects the vehicle body side mounting part and the door side mounting part.

In Patent Document 1, the vehicle body side mounting portion of the grommet is pulled out toward the vehicle body through the through hole of the back door, and then attached to the through hole of the vehicle body. In this case, it is conceivable to make the through hole of the back door larger than the through hole of the vehicle body so that the vehicle body side mounting portion of the grommet can pass through the through hole of the back door.

However, if the through-hole of the back door is made larger than the through-hole of the vehicle body, the window frame of the back door will become thicker, which can lead to problems such as poor appearance of the vehicle or reduced rigidity of the back door. For this reason, it is desirable for the through-hole of the back door to be an opening of approximately the same size as the through-hole of the vehicle body, but this creates the problem of it being difficult to pull out the vehicle body side mounting part through the through-hole of the back door and towards the vehicle body.

Patent No. 5147477

In view of the above problems, the present invention aims to provide a grommet and a method for attaching a mounting part to a second through hole by passing the mounting part through the first through hole, even if the first through hole is approximately the same size as the second through hole.

The present invention relates to a grommet that includes a grommet body through which a wire harness is inserted, the wire harness being routed across a first through hole of a first panel and a second through hole of a second panel, and an attachment portion that is provided at an end of the grommet body and is attached to the second through hole. The attachment portion is configured to be able to pass through the first through hole by being pulled out from the second panel side, and includes an end of the grommet body connected to a substantially annular flange portion that is larger than the first through hole, a cover portion that extends tapered from the flange portion in the separation direction to cover the separation direction side away from the flange portion toward the opposite side of the grommet body, and that holds the periphery of the second through hole between the flange portion and the cover portion, and a tubular portion that extends from the end of the tapered side of the cover portion. The cover portion is characterized in that it is provided with a deformation promoting portion that receives a pressure load from the outside toward the inside in a cross direction that crosses the separation direction and deforms a part of the flange portion toward the separation direction.

The first through hole of the first panel and the second through hole of the second panel are through holes provided in adjacent thin plate-like members in a vehicle such as an automobile, and refer to a through hole in a door panel and a through hole in a vehicle body, for example.
The inward and outward crossing directions refer to the direction toward the wire harness inserted inside the mounting portion and the direction away from the wire harness inserted inside the mounting portion, respectively.

According to this aspect of the invention, even if the first through hole of the grommet is substantially the same size as the second through hole, the mounting portion can be attached to the second through hole by passing it through the first through hole.
Specifically, the cylindrical portion of the grommet can function as a handle that an operator holds in order to pull out the mounting portion of the grommet inserted into the first through hole, allowing the operator to easily pull the mounting portion of the grommet inserted into the first through hole from the second panel side.

At this time, by pulling the tubular portion while applying a pressing load from the outside to the inside in the intersecting direction to the deformation promoting portion, the worker can pull the mounting portion out of the first through hole.
More specifically, when a pressure load is applied in the transverse direction, the deformation promoting portion of the grommet deforms so as to be depressed from the outside toward the inside in the transverse direction.

At this time, the deformation promoting portion deforms so as to pull a portion of the flange portion that is continuous with the deformation promoting portion in the separation direction. Therefore, the deformation promoting portion can apply a tensile load in the separation direction to the portion of the flange portion that is continuous with the deformation promoting portion.

As a result, a part of the flange portion can be deformed in the separation direction so as to rotate in the separation direction around the connection point of the grommet body as a fulcrum, and therefore the outer shape of the flange portion of the grommet can be deformed to a size that allows it to be pulled out of the first through hole.
Therefore, even if the first through hole of the grommet is approximately the same size as the second through hole, the mounting portion can be attached to the second through hole by passing it through the first through hole.

In one aspect of this invention, the tubular portion may be disposed with its axial center shifted in a predetermined offset direction relative to the center of the cover portion as viewed from the separation direction, and the cover portion may include the deformation promoting portion on the side opposite to the predetermined offset direction.

With this configuration, the grommet can ensure a sufficient distance between the wire harness and the deformation promoting portion without increasing the size of the mounting portion, compared to when the tube portion and the cover portion are not positioned with a predetermined offset direction.

This allows the grommet to prevent the deformation-promoting portion from coming into contact with the wire harness early after it has started to deform, which would hinder the deformation of the deformation-promoting portion. This allows the grommet to stably deform a portion of the flange portion in the separation direction.

As a further aspect of the present invention, the deformation promoting portion may be formed in a cross section taken along the separation direction so as to bulge outward from the inner side in the intersecting direction and have an apex.
According to this configuration, the apex of the deformation promoting portion of the grommet can function as a marker for the pressing location, and therefore the grommet can stably deform the deformation promoting portion.

Furthermore, because the deformation promoting portion bulges outward in the cross direction, the grommet can reliably ensure the distance between the wire harness and the deformation promoting portion, and can ensure a larger deformation allowance for the deformation promoting portion in the cross direction.

As a result, when a pressure load in the intersecting direction is applied to the deformation promoting portion, the grommet can apply a larger tensile load in the separation direction to a portion of the flange portion via the deformation promoting portion. This allows the grommet to reliably deform a portion of the flange portion in the separation direction.

As a further aspect of the present invention, the apex may be provided at approximately the center of the deformation promoting portion in the separation direction.
With this configuration, the grommet can more reliably apply a tensile load in the separation direction to a portion of the flange portion compared to a case in which the apex of the deformation promoting portion is located on the flange portion side or the tubular portion side, and therefore the grommet can more reliably deform a portion of the flange portion in the separation direction.

As a further aspect of the present invention, the cover portion may be provided on an inner surface in the vicinity of the flange portion with a groove portion extending around the entire circumference of the cover portion in a circumferential direction.
With this configuration, the grommet can more easily deform the deformation promoting portion than when the groove is not provided, and therefore, when a pressure load in the intersecting direction acts on the deformation promoting portion, the grommet can more reliably deform a portion of the flange portion in the separation direction.

As a further aspect of the present invention, the cover portion may be provided with a temporary locking portion that faces the deformation promoting portion and is temporarily locked to a periphery of the first through hole.
With this configuration, the mounting portion of the grommet is supported by the periphery of the first through hole, so that the pressure load in the intersecting direction can be applied more stably to the deformation promoting portion, so that, for example, an operator can easily press the deformation promoting portion with the hand holding the tubular portion.

Furthermore, by using the provisional locking portion as a fulcrum, the grommet can easily tilt the mounting portion toward the second panel. This allows, for example, an operator to easily pull the flange portion out of the first through hole without releasing the hand holding the tubular portion.

As a result, the worker holding the tubular part can press the deformation promoting part, tilt the mounting part, and pull out the mounting part as a series of movements with one hand, improving the ease of use of the grommet.

As a further aspect of the present invention, the flange portion may be provided with a tapered surface on an outer circumferential edge on the grommet body side.
According to this configuration, the grommet can suppress contact between the outer peripheral edge of the flange portion and the peripheral edge of the first through hole when the flange portion passes through the first through hole, making it easier to pull the flange portion out of the first through hole compared to a case in which the grommet does not have a tapered surface.

As a further aspect of the present invention, the tubular portion may be formed in a shape extending from the cover portion in a predetermined bending direction, and the deformation promoting portion may be provided on the opposite side to the predetermined bending direction.
According to this configuration, the grommet can reduce the load that is directly applied to the deformation promoting portion by the worker.

Specifically, when an operator pulls on the tubular portion in order to remove the mounting portion from the first through hole, the tubular portion of the grommet deforms so that the tip rotates in the opposite direction to the specified bending direction. At this time, a load is generated near the boundary between the tubular portion and the deformation promoting portion, moving from the outside to the inside in the intersecting direction.

As a result, the grommet can apply a pressure load from the outside to the inside in the cross direction to the deformation promoting portion by deforming the tubular portion. Therefore, the grommet can reduce the load that is directly applied to the deformation promoting portion by the worker by deforming the tubular portion.

As a further aspect of the present invention, the cylindrical portion may be adjacent to a portion extending continuously from the deformation promoting portion, and may be provided with a slit cut out from a tip end to a portion adjacent to the cover portion.
At least one slit is sufficient, and preferably two slits are sufficient, with the deformation promoting portion being sandwiched between them.

With this configuration, the tubular portion of the grommet can deform in accordance with the deformation of the cover portion. As a result, the tubular portion of the grommet can further promote the deformation of the deformation promoting portion, and can apply a larger tensile load to a portion of the flange portion. This allows the grommet to more reliably deform a portion of the flange portion.

The present invention also relates to a method for attaching a grommet including a grommet body into which a wire harness is inserted, the wire harness being routed across a first through hole of a first panel and a second through hole of a second panel, and an attachment portion provided at an end of the grommet body and attached to the second through hole, the method including the steps of: attaching the grommet body to an end of the grommet body; a substantially annular flange portion to which an end of the grommet body is connected; a cover portion tapered from the flange portion in a direction away from the flange portion so as to cover a side in the direction away from the flange portion; and a tubular portion extending from an end of the cover portion on the tapered side, the cover portion and the tubular portion of the attachment portion being attached to the end of the grommet body; The method includes an insertion process of inserting the flange portion of the mounting part into the first through hole toward the second panel side, a pull-out process of pulling out the flange portion of the mounting part, which is larger than the first through hole, from the second panel side, and an attachment process of clamping the periphery of the second through hole between the flange portion and the cover portion and attaching the mounting part that has passed through the first through hole to the second panel, and the pull-out process is characterized in that the deformation promoting portion of the cover portion receives a pressing load from the outside to the inside in a transverse direction that intersects the separation direction, thereby deforming a portion of the flange portion toward the separation direction, thereby making the flange portion removable from the first through hole.
According to this aspect of the invention, even if the first through hole of the grommet is substantially the same size as the second through hole, the mounting portion can be attached to the second through hole by passing it through the first through hole.

The present invention provides a grommet and a method for attaching a mounting part to a second through hole by passing the mounting part through the first through hole, even if the first through hole is approximately the same size as the second through hole.

FIG. 4 is a plan view showing the grommet in an attached state. FIG. 4 is an explanatory diagram for explaining an outline of the mounting direction of the grommet. FIG. 4 is an external perspective view showing the external appearance of the grommet as viewed from above and in the front direction. FIG. 4 is an external perspective view showing the external appearance of the grommet as viewed from the rear upward. FIG. 4 is a front view showing the appearance of the grommet. 6 is a cross-sectional view taken along the line AA in FIG. 5 . 6 is a cross-sectional view taken along the line BB in FIG. 5 . FIG. 3 is a cross-sectional view showing the second mounting portion along the line AA. FIG. 13 is an explanatory diagram illustrating the insertion process of the second mounting portion in a cross section taken along the line A-A. FIG. 13 is an explanatory diagram illustrating the removal process of the second mounting portion in a cross section taken along the line A-A. FIG. 13 is an explanatory diagram illustrating the removal process of the second mounting portion in a cross section taken along the line A-A. FIG. 11 is a plan view showing the grommet in an attached state in the second embodiment. 13A to 13C are explanatory diagrams illustrating a process of removing the second attachment portion in the second embodiment.

One embodiment of the invention is described below with reference to the drawings.

The grommet 3 of the first embodiment protects a wire harness W that connects a battery and electrical equipment in a vehicle such as an automobile. Such a grommet 3 will be described with reference to Figs. 1 to 8.

1 shows a plan view of the grommet 3 in an installed state, FIG. 2 shows an explanatory diagram explaining the installation direction of the grommet 3, FIG. 3 shows an external perspective view of the grommet 3 as viewed from above and in the front, and FIG. 4 shows an external perspective view of the grommet 3 as viewed from above and in the rear.
Furthermore, Figure 5 shows a front view of the grommet 3, Figure 6 shows a cross-sectional view taken along the line A-A in Figure 5, Figure 7 shows a cross-sectional view taken along the line B-B in Figure 5, and Figure 8 shows a cross-sectional view taken along the line A-A of the second mounting portion 30.

In addition, the arrow X in the figure indicates the front-to-rear direction of the grommet 3 (hereinafter referred to as the front-to-rear direction X), and the arrow Y indicates the width direction (hereinafter referred to as the width direction Y) which is a direction approximately perpendicular to the front-to-rear direction X in a plan view.
Furthermore, in the front-rear direction X, the direction from the first panel 1 to the second panel 2 is defined as the front, and the direction from the second panel 2 to the first panel 1 is defined as the rear. In addition, the upper side in FIG. 2 is defined as the upper side of the grommet 3, and the lower side in FIG. 2 is defined as the lower side of the grommet 3.

First, as shown in FIG. 1, a wire harness W is arranged so as to bridge a first panel 1 and a second panel 2 that constitute a vehicle.
Here, the first panel 1 is, for example, a back door panel supported on the body of a vehicle so as to be freely opened and closed. As shown in Figures 1 and 2, a first through hole 1a having a substantially circular shape in a front view is formed in the first panel 1 so as to penetrate in the front-rear direction X.

On the other hand, the second panel 2 is, for example, a panel constituting the body of a vehicle, and is disposed facing the first panel 1 at a predetermined distance forward in the front-rear direction X. As shown in Figures 1 and 2, the second panel 2 is formed with a second through-hole 2a that penetrates in the front-rear direction X and is generally deformed in front view at a position spaced apart on one side Ya in the width direction Y from the first through-hole 1a.
The first through hole 1a of the first panel 1 and the second through hole 2a of the second panel 2 are formed to have substantially the same diameter.

As shown in FIG. 1 , the above-mentioned wire harness W is arranged across the first panel 1 and the second panel 2 by being inserted into the first through hole 1 a of the first panel 1 and the second through hole 2 a of the second panel 2.
Therefore, as shown in FIG. 1 , the wire harness W passes through the first through hole 1a along the front-rear direction X, is arranged approximately linearly between the first panel 1 and the second panel 2 toward one side Ya in the width direction Y, and is bent toward the front-rear direction X to pass through the second through hole 2a.

As shown in FIG. 1 , the wire harness W is inserted into a grommet 3 that is disposed across a first panel 1 and a second panel 2 and has a generally crank-like shape in a plan view.
The grommet 3 is made of a flexible material such as synthetic rubber, and has an internal space through which the wire harness W can be inserted.

As shown in FIG. 1, the grommet 3 is composed of a first mounting portion 10 that is attached to the first through hole 1a, a grommet body 20 that extends from the first mounting portion 10 to one side Ya in the width direction Y, and a second mounting portion 30 that is provided at the end of the grommet body 20 and is attached to the second through hole 2a.

As shown by the arrow M in Figure 2, the grommet 3 is configured so that the second mounting portion 30, which is inserted through the first through hole 1a toward the second panel 2, can be pulled out from the second panel 2 side and passed through the first through hole 1a, and then attached to the second through hole 2a.

As shown in FIG. 1, the first attachment portion 10 covers the first through hole 1a of the first panel 1 and is formed so as to be able to fit into the first through hole 1a.
Specifically, as shown in Figures 3 to 6 , the first mounting portion 10 is composed of a flange portion 11 having a generally annular shape when viewed from the front in the fore-and-aft direction X, and a hollow cover portion 12 extending forward in the fore-and-aft direction X from the flange portion 11.

As shown in FIG. 1, the first mounting portion 10 is attached to the first panel 1 with the flange portion 11 and the cover portion 12 sandwiching the periphery of the first through hole 1a.
In addition, the first mounting portion 10 may have any suitable shape as long as it can be attached by fitting into the first through hole 1a of the first panel 1, so a detailed description thereof will be omitted in this embodiment.

The grommet body 20 is formed in a shape that allows the wire harness W led out from the first mounting portion 10 to be inserted therein. As shown in FIG. 5, the grommet body 20 extends from a position lower than approximately the center of the first mounting portion 10 in a front view.

Specifically, as shown in Figures 1 and 2, the grommet body 20 is formed in a generally cylindrical shape extending generally linearly in the width direction Y between the first panel 1 and the second panel 2. In addition, as shown in Figures 3 and 4, the grommet body 20 has a bellows portion 20a formed in the vicinity of the approximate center in the width direction Y.

Furthermore, as shown in FIG. 1, the end of the grommet body 20 on one side Ya in the width direction Y is bent forward in the front-rear direction X and connected to the second mounting part 30, and the end of the grommet body 20 on the other side Yb in the width direction Y is bent backward in the front-rear direction X and connected to the first mounting part 10.

As shown in FIG. 1, the second attachment portion 30 covers the second through hole 2a of the second panel 2 and is formed so as to be able to fit into the second through hole 2a.
Specifically, as shown in Figures 1 to 6, the second mounting portion 30 is composed of a flange portion 31 to which an end of the grommet body 20 is connected, a cover portion 32 extending in a tapered manner from the flange portion 31 toward the front side in the fore-and-aft direction X, and a tubular portion 33 extending from the cover portion 32 toward the front side in the fore-and-aft direction X.

In addition, the second mounting portion 30 is arranged so that the flange portion 31 and the cover portion 32 are approximately coaxial with respect to the axial center along the front-to-rear direction X at the end of the grommet body 20, and the tubular portion 33 is shifted to one side Ya in the width direction Y.
As shown in FIG. 1, the second mounting portion 30 is attached to the second panel 2 with the flange portion 31 and the cover portion 32 sandwiching the periphery of the second through hole 2a.

Next, the second attachment portion 30 will be described in detail. To facilitate the following explanation, the direction from the rear to the front in the front-rear direction X, i.e., the front-rear direction X from the first panel 1 to the second panel 2, will be described as the separation direction Xa away from the flange portion 31.

As shown in Figures 3 to 6, the flange portion 31 has a thickness in the separation direction Xa, is larger than the first through hole 1a and the second through hole 2a, and is formed in a generally circular ring shape in a front view having an outer diameter that is approximately the same as the outer diameter of the flange portion 11 of the first mounting portion 10.
As shown in FIGS. 7 and 8, the inner circumferential surface of the flange portion 31 is formed to have substantially the same diameter as the inner diameter of the grommet body 20 .

Specifically, as shown in Figures 7 and 8, the flange portion 31 is formed by coaxially arranging a cone portion 311 having a generally truncated cone shape to which the grommet body 20 is connected, and a flat portion 312 extending from the cone portion 311 in the separation direction Xa.

The cone portion 311 is formed in a generally truncated cone shape with a smaller diameter than the second through hole 2a on the grommet body 20 side and a larger diameter than the second through hole 2a on the cover portion 32 side. Therefore, the outer peripheral surface of the cone portion 311 is formed into a tapered surface 31a whose diameter gradually increases from the grommet body 20 side in the separation direction Xa.
As shown in FIG. 4, three ribs 313 are formed on the small diameter end face (the end face on the grommet body 20 side) of this cone portion 311 so as to extend upward from the grommet body 20 in a generally radial pattern.

On the other hand, the flat plate portion 312 is formed in a generally circular plate shape with an outer diameter that is approximately the same as the large diameter of the outer peripheral surface of the cone portion 311. As shown in Figures 7 and 8, a peripheral portion 314 is formed on the outer peripheral edge of the flat plate portion 312 on the cover portion 32 side, standing in the separation direction Xa.

As shown in FIGS. 7 and 8, the cover portion 32 extends from the flange portion 31 in the separation direction Xa in a generally tapered cone shape so as to cover the separation direction Xa side of the flange portion 31.
More specifically, as shown in Figure 7, in a vertical cross section along the separation direction Xa, the cover portion 32 is formed by connecting to the flange portion 31 an expanding portion 321 whose outer diameter expands as it moves away from the flange portion 31 in the separation direction Xa, and a first contracting portion 322 and a second contracting portion 323 whose outer diameter is gradually reduced in this order.

The outer diameter of the enlarged diameter portion 321 gradually increases as it moves away from the flange portion 31 in the direction Xa. The outer diameter of the enlarged diameter portion 321 is formed so that the small diameter side is smaller than the outer diameter of the flat portion 312, and the large diameter side is formed so that the outer diameter is approximately the same as the inner diameter of the peripheral portion 314 of the flange portion 31.

As shown in FIG. 7, the outer diameter of the first reduced diameter section 322 is gradually reduced from the expanded diameter section 321 toward the separation direction Xa so that the inclination of the outer peripheral surface with respect to the separation direction Xa is smaller than that of the second reduced diameter section 323 in a vertical cross section along the separation direction Xa.

7, the outer diameter of the second reduced diameter portion 323 is rapidly reduced from the first reduced diameter portion 322 toward the separation direction Xa so that the inclination of the outer peripheral surface with respect to the separation direction Xa is greater than that of the first reduced diameter portion 322 in a vertical cross section along the separation direction Xa. The outer diameter of this second reduced diameter portion 323 is reduced to a size such that the tip on the separation direction Xa side is smaller than the outer diameter of the grommet body 20.

As shown in Figures 7 and 8, the inner surface of the cover portion 32 extends in the separation direction Xa with a diameter larger than the inner diameter of the flange portion 31, and then is gradually formed in a shape that narrows in diameter as it extends in the separation direction Xa so that the thicknesses of the first narrowing diameter portion 322 and the second narrowing diameter portion 323 are approximately constant.
7 and 8, in a cross section taken along the separating direction Xa, the cover portion 32 has a thick portion that is thicker than other portions near the boundary between the enlarged diameter portion 321 and the first reduced diameter portion 322. Furthermore, in the thick portion of the cover portion 32, a groove portion 324 is formed that is recessed along the circumferential direction of the inner circumferential surface, as shown in FIG.

The tubular portion 33 is disposed such that its axial center is located on one side Ya in the width direction Y as viewed from the separation direction Xa with respect to the axial center of the cover portion 32 along the front-rear direction X, and is formed in a generally cylindrical shape extending from the end of the cover portion 32 toward the separation direction Xa. The tip of the tubular portion 33, which is the tip in the separation direction Xa, is formed in a shape that expands in diameter toward the radial outward direction of the tubular portion 33.

In detail, as shown in Figure 8, in a horizontal cross section along the separation direction Xa, the tubular portion 33 is formed into a cross-sectional shape in which one side Ya in the width direction Y extends from the first reduced diameter portion 322 of the cover portion 32, and the other side Yb in the width direction Y extends from the second reduced diameter portion 323 of the cover portion 32.
As shown in Figures 3 to 5, this tubular portion 33 has two slits 34 cut out in the front-rear direction X from the tip of the tubular portion 33 to the vicinity of the cover portion 32, which are opposed to each other in the vertical direction.

As shown in FIG. 8, the slit 34 is composed of a circular opening portion that is opened in a substantially circular shape when viewed from above, and a rectangular opening portion that is opened in a substantially rectangular shape when viewed from above.
More specifically, the circular opening portion of the slit 34 is formed so that its rear end is located near the end portion of the cover portion 32 on the separating direction Xa side in plan view as shown in Fig. 8. On the other hand, the rectangular opening portion of the slit 34 is formed so as to extend from the circular opening portion to the tip of the tube portion 33 in plan view as shown in Fig. 8.

For this reason, as shown in FIG. 8, in a horizontal cross section along the separation direction Xa, the tubular portion 33 is divided into a first half portion 33a located on the other side Yb in the width direction Y and having an outer peripheral surface continuous with the second reduced diameter portion 323, and a second half portion 33b located on one side Ya in the width direction Y and having an outer peripheral surface continuous with the first reduced diameter portion 322.

With the above-described configuration, the cover portion 32 of the second mounting portion 30 is formed with a deformation promoting portion 35 that deforms a portion of the flange portion 31 in the separation direction Xa, and a temporary engagement portion 36 that engages with the periphery of the first through hole 1a.
Here, in a plan view, the direction intersecting the separation direction Xa is defined as the intersecting direction, and among the intersecting directions, the direction toward the wire harness W is defined as the inner side of the intersecting direction, and the direction away from the wire harness W is defined as the outer side of the intersecting direction.

The deformation promoting portion 35 is a portion that receives a pressure load from the outer side toward the inner side in the cross direction and deforms a part of the flange portion 31 toward the separation direction Xa. As shown in FIG. 8, the deformation promoting portion 35 is formed adjacent to the other side Yb in the width direction Y of the tube portion 33 in a horizontal cross section along the separation direction Xa.

Specifically, as shown in FIG. 8, the deformation promoting portion 35 is formed in a horizontal cross section along the separation direction Xa by a first reduced diameter portion 322 and a second reduced diameter portion 323 that connect the expanded diameter portion 321 and the first half portion 33a of the tubular portion 33.

Therefore, in a horizontal cross section along the separation direction Xa, the deformation promoting portion 35 is formed with a cross-sectional shape that bulges from the inside to the outside in the intersecting direction, with the boundary between the first narrowing portion 322 and the second narrowing portion 323 as the apex 35a.
As shown in FIG. 8, the deformation promoting portion 35 is formed so that the apex 35a is located approximately in the center of the separation direction Xa in a horizontal cross section along the separation direction Xa.

The provisional locking portion 36 is a portion that is locked to the periphery of the first through hole 1 a when the second attachment portion 30 is pulled out from the first through hole 1 a. As shown in FIG. 8, the provisional locking portion 36 is formed adjacent to one side Ya in the width direction Y of the cylindrical portion 33 in a horizontal cross section taken along the separating direction Xa.
Specifically, as shown in FIG. 8, the provisional locking portion 36 is formed by a boundary portion between the first reduced diameter portion 322 and the second half portion 33b of the tubular portion 33 in a horizontal cross section along the separating direction Xa.

Next, a method of attaching the first attachment portion 10 and the second attachment portion 30 of the grommet 3 configured as described above to the first panel 1 and the second panel 2, respectively, will be described with reference to FIGS. 2 and 9 to 11.
Note that Figure 9 is an explanatory diagram illustrating the insertion process of the second mounting portion 30 in a cross section taken along the line A-A, with Figure 9(a) showing an explanatory diagram of the state in which the tubular portion 33 of the second mounting portion 30 has been inserted into the first through hole 1a, and Figure 9(b) showing an explanatory diagram of the state in which the second mounting portion 30 is held.

Figures 10 and 11 are explanatory diagrams illustrating the removal process of the second attachment portion 30 in the cross section taken along the line A-A. Figure 10(a) shows an explanatory diagram of the operation of deforming the flange portion 31, and Figure 10(b) shows an explanatory diagram of the state in which part of the flange portion 31 has been deformed.

Furthermore, Figure 11 (a) shows an explanatory diagram of the process in which a part of the flange portion 31 is pulled out of the first through hole 1a, and Figure 11 (b) shows an explanatory diagram of the process in which the second mounting portion 30 passes through the first through hole 1a.
For clarity of illustration, the wire harness W and the right hand RH of the operator are illustrated by two-dot chain lines in Figs. 9 to 11 .

First, as shown by the arrow M in FIG. 2, the worker inserts the second mounting portion 30 of the grommet 3, through which the wire harness W has been inserted, into the first through-hole 1a from the first panel 1 toward the second panel 2. At this time, the worker inserts the tube portion 33 and the cover portion 32 of the second mounting portion 30 into the first through-hole 1a in that order, as shown in FIG. 9(a).

Then, as shown in FIG. 9(b), the worker grasps the tube portion 33 that has passed through the first through hole 1a and pulls it toward the second panel 2 (in the separation direction Xa) until the top 35a of the deformation promoting portion 35 passes through the first through hole 1a.

When the top portion 35a passes through the first through hole 1a, the worker starts the pulling-out process of pulling out the flange portion 31, which has an outer diameter larger than that of the first through hole 1a, from the second panel 2 side.
9(b) and 10(a), the worker moves the thumb of the right hand RH gripping the tube portion 33 to the apex 35a of the deformation promoting portion 35. After that, the worker applies a pressing load from the outside to the inside in the cross direction toward the wire harness W to the apex 35a, as shown by the thick arrow in FIG.

At this time, the worker applies a pressure load to the top portion 35a so as to invert and deform the deformation promoting portion 35 from the outside to the inside in the cross direction, for example.
When a pressure load is applied to the apex 35a in the transverse direction, the cover portion 32 of the second attachment portion 30 is bent and deformed such that the deformation promoting portion 35 is depressed inward in the transverse direction, as shown in FIG. 10(b).

Specifically, the first reduced diameter portion 322 of the deformation promoting portion 35 deforms so that the apex 35a rotates inward in the intersecting direction with the groove portion 324 as a fulcrum, and the second reduced diameter portion 323 deforms so that the apex 35a rotates inward in the intersecting direction with the vicinity of the boundary with the tubular portion 33 as a fulcrum.

Furthermore, as the cover portion 32 deforms, the first half portion 33a of the tube portion 33 deforms inward in the transverse direction. Therefore, the deformation promoting portion 35 deforms in the direction opposite to the separation direction Xa and toward one side Ya in the width direction Y due to the deformation of the first half portion 33a.

Although detailed illustration is omitted, when the worker holds the tube portion 33 and the cover portion 32 deforms, the first half portion 33a and the second half portion 33b of the tube portion 33 deform, and their inner surfaces come into contact with the wire harness W.

In this way, the cover portion 32 and the tube portion 33 deform integrally in the intersecting direction, and a tensile load in the separation direction Xa and a tensile load in the width direction Y act on a part of the flange portion 31 connected to the deformation promoting portion 35. Therefore, as shown in FIG. 10(b), the part of the flange portion 31 deforms so as to rotate in the separation direction Xa with the vicinity of the connection point with the grommet body 20 as a fulcrum.

After deforming a portion of the flange portion 31, the worker tilts the second mounting portion 30 toward the second panel 2 (in the direction of the thick arrow in Figure 11 (a)) while applying a compressive load in the transverse direction to the top 35a, as shown in Figure 11 (a) , so that a portion of the deformed flange portion 31 is displaced toward the second panel 2.
At this time, the worker abuts the temporary engagement portion 36 of the second mounting portion 30 against the peripheral edge of the first through hole 1a in the width direction Y and tilts the second mounting portion 30 with the peripheral edge of the first through hole 1a as a fulcrum.

Then, the worker pulls the second mounting portion 30 together with the wire harness W toward the second panel 2 side, thereby pulling out a part of the deformed flange portion 31 from the first through hole 1a.
When a part of the deformed flange portion 31 passes through the first through hole 1a, the worker repositions his/her right hand RH holding the tube portion 33 so as to hook his/her thumb on a part of the flange portion 31, as shown in FIG. 11(b).

Thereafter, the worker pulls the second mounting portion 30 while twisting it in the width direction Y, as shown by the thick arrow in Figure 11 (b), thereby pulling the second mounting portion 30 out of the first through hole 1a and positioning it between the first panel 1 and the second panel 2.
When the second mounting portion 30 is moved between the first panel 1 and the second panel 2, the worker clamps the peripheral edge of the first through hole 1a between the flange portion 11 and the cover portion 12 of the first mounting portion 10, as shown in Figure 1, and attaches the first mounting portion 10 to the first panel 1.

Furthermore, as shown in FIG. 1, the worker clamps the periphery of the second through hole 2a between the flange portion 31 and cover portion 32 of the second mounting portion 30 that has passed through the first through hole 1a, and attaches the second mounting portion 30 to the second panel 2. In this manner, the method of attaching the grommet 3 is to arrange the grommet 3 across the first panel 1 and the second panel 2.

As described above, the grommet 3 of Example 1 is composed of a grommet body 20 through which the wire harness W is inserted, the wire harness W being arranged across the first through hole 1a of the first panel 1 and the second through hole 2a of the second panel 2, and a second mounting portion 30 which is provided at an end of the grommet body 20 and is attached to the second through hole 2a.
The second attachment portion 30 of the grommet 3 is configured to be able to be pulled out from the second panel 2 side and pass through the first through hole 1a.

The second mounting portion 30 is connected to an end of the grommet body 20 and includes a generally annular flange portion 31 larger than the first through hole 1a, and a cover portion 32 extending tapered from the flange portion 31 in the separation direction Xa so as to cover the separation direction Xa side, and clamping the periphery of the second through hole 2a between the flange portion 31 and the cover portion 32.
Furthermore, the second attachment portion 30 includes a tubular portion 33 extending from the tapered end of the cover portion 32 .

The cover portion 32 is provided with a deformation promoting portion 35 that receives a pressure load from the outside to the inside in a direction intersecting the separation direction Xa and deforms a part of the flange portion 31 toward the separation direction Xa.

As a result, even if the first through hole 1a of the grommet 3 is approximately the same size as the second through hole 2a, the second mounting portion 30 can be attached to the second through hole 2a by passing it through the first through hole 1a.
Specifically, the tubular portion 33 of the grommet 3 can function as a handle that an operator holds in order to pull out the second mounting portion 30 of the grommet 3 inserted into the first through hole 1a. Therefore, the operator can easily pull the second mounting portion 30 of the grommet 3 inserted into the first through hole 1a from the second panel 2 side.

At this time, by applying a pressure load from the outside to the inside in the intersecting direction to the deformation promoting portion 35 while pulling the tubular portion 33, the worker can pull out the second mounting portion 30 from the first through hole 1a.
More specifically, when a pressure load is applied in the transverse direction, the deformation promoting portion 35 of the grommet 3 deforms so as to be depressed from the outside toward the inside in the transverse direction.

At this time, the deformation promoting portion 35 deforms so as to pull a portion of the flange portion 31 that is continuous with the deformation promoting portion 35 in the separation direction Xa. Therefore, the deformation promoting portion 35 can apply a tensile load in the separation direction Xa to the portion of the flange portion 31 that is continuous with the deformation promoting portion 35.

As a result, a part of the flange portion 31 can be deformed in the separation direction Xa so as to rotate in the separation direction Xa with the connection point of the grommet body 20 as a fulcrum. Therefore, the outer shape of the flange portion 31 of the grommet 3 can be deformed to a size that allows it to be pulled out of the first through hole 1 a.
Therefore, even if the first through hole 1a of the grommet 3 is approximately the same size as the second through hole 2a, the second mounting portion 30 can be attached to the second through hole 2a by passing it through the first through hole 1a.

The axial center of the tube portion 33 is shifted to one side Ya in the width direction Y with respect to the center of the cover portion 32 when viewed from the separation direction Xa. The cover portion 32 is provided with a deformation promoting portion 35 on the side opposite to the one side Ya in the width direction Y.

With this configuration, the grommet 3 can ensure a sufficient distance between the wire harness W and the deformation promoting portion 35 without increasing the size of the second mounting portion 30, compared to when the tube portion 33 and the cover portion 32 are not positioned offset to one side Ya in the width direction Y.

As a result, the grommet 3 can prevent the deformation promoting portion 35 from being hindered from deforming due to the deformation promoting portion 35 having started to deform coming into contact with the wire harness W early on. As a result, the grommet 3 can stably deform a portion of the flange portion 31 in the separation direction Xa.

Further, the deformation promoting portion 35 is formed in a cross section along the separation direction Xa so as to bulge outward from the inner side in the intersecting direction and to have a vertex 35a.
According to this configuration, the top portion 35a of the deformation promoting portion 35 of the grommet 3 can function as a marker for the pressed portion. Therefore, the grommet 3 can stably deform the deformation promoting portion 35.

Furthermore, because the deformation promoting portion 35 bulges outward in the cross direction, the grommet 3 can reliably ensure the distance between the wire harness W and the deformation promoting portion 35, and can ensure a larger deformation allowance for the deformation promoting portion 35 in the cross direction.

As a result, when a pressure load in the intersecting direction is applied to the deformation promoting portion 35, the grommet 3 can apply a larger tensile load in the separation direction Xa to a portion of the flange portion 31 via the deformation promoting portion 35. Therefore, the grommet 3 can reliably deform a portion of the flange portion 31 in the separation direction Xa.

The apex 35a is provided at approximately the center of the deformation promoting portion 35 in the separation direction Xa.
According to this configuration, the grommet 3 can more reliably apply a tensile load in the separating direction Xa to a part of the flange portion 31 compared to a case in which the apex 35a of the deformation promoting portion 35 is located on the flange portion 31 side or the tubular portion 33 side. Therefore, the grommet 3 can more reliably deform the part of the flange portion 31 in the separating direction Xa side.

Further, the cover portion 32 has a groove portion 324 formed on the inner surface in the vicinity of the flange portion 31 , the groove portion 324 extending around the entire circumference of the cover portion 32 in the circumferential direction.
According to this configuration, the grommet 3 can more easily deform the deformation promoting portion 35 compared to a case where the groove portion 324 is not provided. Therefore, when a pressing load in the intersecting direction acts on the deformation promoting portion 35, the grommet 3 can more reliably deform a part of the flange portion 31 toward the separation direction Xa.

The cover portion 32 faces the deformation promoting portion 35 and is provided with a provisionally engaging portion 36 that is provisionally engaged with the periphery of the first through hole 1a.
According to this configuration, the second mounting portion 30 of the grommet 3 is supported by the periphery of the first through hole 1a, so that a pressing load in the intersecting direction can be applied more stably to the deformation promoting portion 35. Therefore, for example, an operator can easily press the deformation promoting portion 35 with the hand holding the tubular portion 33.

Furthermore, by using the provisional locking portion 36 as a fulcrum, the second mounting portion 30 of the grommet 3 can be easily tilted toward the second panel 2. Therefore, for example, an operator can easily pull out the flange portion 31 from the first through hole 1a without releasing the hand holding the tube portion 33.

As a result, the pressing of the deformation promoting portion 35, the tilting of the second mounting portion 30, and the pulling out of the second mounting portion 30 can be performed in a series of actions with one hand by an operator holding the tubular portion 33, thereby improving the ease of use of the grommet 3.

The flange portion 31 has a tapered surface 31a on the outer circumferential edge on the grommet body 20 side.
With this configuration, the grommet 3 can prevent contact between the outer peripheral edge of the flange portion 31 and the periphery of the first through hole 1a when the flange portion 31 passes through the first through hole 1a. Therefore, the grommet 3 can make it easier to pull out the flange portion 31 from the first through hole 1a compared to a case in which a tapered surface is not provided.

The cylindrical portion 33 is adjacent to the first half portion 33 a and is provided with a slit 34 cut out from the tip to the vicinity of the cover portion 32 .
According to this configuration, the tubular portion 33 of the grommet 3 can deform in accordance with the deformation of the cover portion 32. Therefore, the tubular portion 33 of the grommet 3 can further promote the deformation of the deformation promoting portion 35, and can apply a larger tensile load to a portion of the flange portion 31. This allows the grommet 3 to more reliably deform a portion of the flange portion 31.

The mounting method of the grommet 3 in Example 1 is a mounting method for a grommet 3 that is configured with a grommet body 20 through which the wire harness W is inserted and that is routed across the first through hole 1a of the first panel 1 and the second through hole 2a of the second panel 2, and a second mounting portion 30 that is provided at the end of the grommet body 20 and is attached to the second through hole 2a.

The method of mounting the grommet 3 includes a substantially annular flange portion 31 to which the end of the grommet body 20 is connected, a cover portion 32 extending tapered from the flange portion 31 in the separation direction Xa so as to cover the separation direction Xa side, and a tube portion 33 extending from the tapered end of the cover portion 32. The method includes a step of inserting the cover portion 32 and the tube portion 33 of the second mounting portion 30 into the first through hole 1a toward the second panel 2 side.

The method of mounting the grommet 3 further includes a pull-out process in which the flange portion 31 of the second mounting portion 30, which is larger than the first through hole 1a, is pulled out from the second panel 2 side, and an attachment process in which the second mounting portion 30 that has passed through the first through hole 1a is attached to the second panel 2 by clamping the periphery of the second through hole 2a between the flange portion 31 and the cover portion 32.

The pulling-out process is a process in which the deformation promoting portion 35 of the cover portion 32 receives a pressing load from the outside to the inside in a transverse direction intersecting the separation direction Xa, thereby deforming a part of the flange portion 31 toward the separation direction Xa, thereby making it possible to pull out the flange portion 31 from the first through hole 1a.
With this, even if the first through hole 1a of the grommet 3 is approximately the same size as the second through hole 2a, the second mounting portion 30 can be attached to the second through hole 2a by passing it through the first through hole 1a.

A grommet 3 according to a second embodiment, which has a cylindrical portion extending in a direction different from that of the grommet 3 according to the first embodiment, will be described with reference to Figs. 12 and 13 .
12 is a plan view of the grommet 3 in the attached state in the second embodiment, and FIG. 13 is an explanatory diagram for explaining the process of removing the second attachment portion 30 in the second embodiment.
Moreover, the same components as those in the above-mentioned embodiment are given the same reference numerals and detailed description thereof will be omitted.

The grommet 3 of the second embodiment is configured with a first attachment portion 10, a grommet body 20, and a second attachment portion 30, similar to the grommet 3 of the first embodiment.
The first mounting portion 10 and the grommet body 20 have the same configuration as in the first embodiment described above, and therefore a detailed description thereof will be omitted.

The second mounting portion 30 is composed of a flange portion 31, a cover portion 32, and a tube portion 37 arranged along the front-rear direction X. As shown in FIG. 12, the flange portion 31 and the cover portion 32 of the second mounting portion 30 have the same configuration as in the above-mentioned Example 1, and therefore a detailed description thereof will be omitted.

On the other hand, as shown in Figure 12, the tubular portion 37 of the second mounting portion 30 is bent from the cover portion 32 toward one side Ya in the width direction Y and then extended in the width direction Y, unlike the tubular portion 33 of Example 1.
Furthermore, the tubular portion 37 of the second mounting portion 30 has slits 38 cut out to a length in the width direction Y from the tip of the tubular portion 37 to the vicinity of the cover portion 32, the slits 38 being opened opposite each other in the vertical direction.

For this reason, as shown in Figures 12 and 13(a), the tubular portion 37 is divided into a first half 37a located on the front side in the front-rear direction X and having an outer peripheral surface that is continuous with the second reduced diameter portion 323, and a second half 37b located on the rear side in the front-rear direction X and having an outer peripheral surface that is continuous with the first reduced diameter portion 322.

Furthermore, with the above-mentioned configuration, as shown in FIG. 13(a), the cover portion 32 of the second attachment portion 30 is formed with a deformation promoting portion 35 that deforms a part of the flange portion 31 in the separation direction Xa, and a provisional locking portion 36 that locks onto the periphery of the first through hole 1a, similar to the above-mentioned first embodiment.

Specifically, as shown in FIG. 13(a), the deformation promoting portion 35 is formed in a horizontal cross section along the separation direction Xa by a first reduced diameter portion 322 and a second reduced diameter portion 323 that connect the expanded diameter portion 321 and the first half portion 37a of the tubular portion 37.

As shown in FIG. 13(a), the provisional locking portion 36 is formed by the boundary between the first reduced diameter portion 322 and the second half portion 37b of the tubular portion 37 in a horizontal cross section along the separation direction Xa.

Next, a method of attaching the second attachment portion 30 of the grommet 3 of the second embodiment to the second panel 2 will be described with reference to FIGS.
First, as shown by the arrow M in Fig. 2, the worker inserts the second mounting portion 30 of the grommet 3, through which the wire harness W has been inserted in advance, into the first through hole 1a from the first panel 1 toward the second panel 2. At this time, the worker inserts the tube portion 37 and the cover portion 32 of the second mounting portion 30 into the first through hole 1a in this order, as shown in Fig. 13(a) .

Thereafter, the worker starts the pulling-out process of pulling out the flange portion 31, which has an outer diameter larger than the first through-hole 1a, from the second panel 2 side.
In detail, the worker grasps the tubular portion 37 that has passed through the first through hole 1a, and pulls it toward the second panel 2 (in the separating direction Xa) until the top 35a of the deformation promoting portion 35 passes through the first through hole 1a.

At this time, as shown in FIG. 13B, the tubular portion 37 of the second attachment portion 30 is deformed so that its axis, which is approximately parallel to the width direction Y, becomes approximately parallel to the separation direction Xa.
Specifically, as shown in FIG. 13B, the tube portion 37 deforms so that the tip thereof rotates toward the other side Yb in the width direction Y, with the vicinity of the boundary with the cover portion 32 as a fulcrum.

This deformation of the tubular portion 37 causes the first half 37a to press the vicinity of the boundary with the cover portion 32 from the outside to the inside in the cross direction, as shown in Figures 13(a) and 13(b). As a result, the deformation promoting portion 35 of the second mounting portion 30 receives a pressing load from the outside to the inside in the cross direction due to the deformation of the tubular portion 37, and begins to deform slightly from the outside to the inside in the cross direction, as shown in Figure 13(b).

Then, as in the first embodiment described above, the worker applies a pressing load from the outside to the inside in the cross direction toward the wire harness W to the top 35a of the deformation promoting portion 35 with the thumb of the right hand RH that is holding the tube portion 37, thereby deforming a part of the flange portion 31.

After deforming a portion of the flange portion 31, the worker tilts the second mounting portion 30 toward the second panel 2 while abutting the provisional locking portion 36 of the second mounting portion 30 against the periphery of the first through hole 1a, and pulls out a portion of the flange portion 31 from the first through hole 1a. Furthermore, the worker pulls the second mounting portion 30 while twisting it in the width direction Y, as in Example 1, to pull the second mounting portion 30 out of the first through hole 1a and position it between the first panel 1 and the second panel 2.

Then, as shown in FIG. 1, the worker attaches the first mounting portion 10 to the first panel 1 and the second mounting portion 30 to the second panel 2, thereby disposing the grommet 3 across the first panel 1 and the second panel 2.

As described above, the grommet 3 of Example 2 and the method of attaching the grommet 3 are similar to those of Example 1 described above, and even if the first through hole 1a is approximately the same size as the second through hole 2a, the second attachment portion 30 can be attached to the second through hole 2a by passing it through the first through hole 1a.

The cylindrical portion 37 is formed in a shape extending from the cover portion 32 to one side Ya in the width direction Y. The deformation promoting portion 35 is provided on the other side Yb in the width direction Y.
According to this configuration, the grommet 3 can reduce the load directly applied to the deformation promoting portion 35 by the worker.

Specifically, when an operator pulls on the tubular portion 37 in order to pull the second mounting portion 30 out of the first through hole 1a, the tubular portion 37 of the grommet 3 deforms so that the tip rotates toward the other side Yb in the width direction Y. At this time, a load is generated near the boundary between the tubular portion 37 and the deformation promoting portion 35, which is directed from the outside to the inside in the intersecting direction.

As a result, the grommet 3 can apply a pressure load from the outside to the inside in the cross direction to the deformation promoting portion 35 by deforming the tubular portion 37. Therefore, the grommet 3 can reduce the load that is directly applied to the deformation promoting portion 35 by the worker by using the tubular portion 37.

In the configuration of the present invention and the correspondence with the above-mentioned embodiment,
The mounting portion of the present invention corresponds to the second mounting portion 30 of the embodiment.
Similarly,
The direction perpendicular to the separation direction corresponds to the width direction Y,
The predetermined offset direction corresponds to one side Ya in the width direction Y,
The predetermined bending direction corresponds to one side Ya in the width direction Y,
The portion extending continuously from the deformation promoting portion corresponds to the first half portion 33a, 37a.
The present invention is not limited to the configurations of the above-described embodiments, and many other embodiments can be obtained.

For example, in the above embodiment, the first panel 1 and the second panel 2 are configured as components of a vehicle such as an automobile, but the panel is not limited to a vehicle such as an automobile as long as it is a thin plate-like member to which the grommet 3 can be attached.
Further, although the grommet 3 has a generally crank-like shape in plan view, the present invention is not limited to this, and may be a grommet extending generally linearly in plan view, or a grommet generally arc-shaped in plan view.
Further, although the cylindrical portions 33, 37 of the second attachment portion 30 are grasped with the right hand RH of the operator, this is not limited thereto, and they may be grasped with the left hand of the operator.

In addition, the grommet 3 has a first mounting portion 10 and a second mounting portion 30, but is not limited to this and may be a grommet having only the second mounting portion. Even in this case, the first through hole 1a and the second through hole 2a have approximately the same diameter.

In addition, the first mounting portion 10 and the second mounting portion 30 are generally circular when viewed from the front, but this is not limited thereto, and the first mounting portion and the second mounting portion may be generally oblong when viewed from the front. In this case, the deformation promoting portion of the second mounting portion is formed so as to be located on the major axis of the generally oblong shape when viewed from the front.

Further, although the two slits 34, 38 are provided in the second attachment portion 30, the present invention is not limited to this and one slit or three or more slits may be provided.
In addition, the tubular portions 33, 37 are positioned offset to one side Ya in the width direction Y with respect to the axial centers of the flange portion 31 and the cover portion 32, but this is not limited to this, and the flange portion, cover portion, and tubular portion may be positioned coaxially.

Alternatively, the tubular portion may be positioned offset to the other side Yb in the width direction Y with respect to the axial center of the flange portion and the cover portion. In this case, the tubular portion may either extend in the direction Xa away from the cover portion, or be bent to the other side Yb in the width direction Y.

1...First panel 1a...First through hole 2...Second panel 2a...Second through hole 3...Grommet 20...Grommet body 30...Second mounting portion 31...Flange portion 31a...Tapered surface 32...Cover portion 33, 37...Cylindrical portion 33a, 37a...First half portion 34, 38...Slit 35...Deformation promoting portion 35a...Top portion 36...Temporary retaining portion 324...Groove portion W...Wire harness Xa...Separation direction Y...Width direction

Claims (10)

a grommet body through which a wire harness is inserted, the wire harness being routed across the first through hole of the first panel and the second through hole of the second panel;
a mounting portion provided at an end of the grommet body and attached to the second through hole,
The mounting portion is
The second panel is configured to be pulled out from the second panel and pass through the first through hole,
an annular flange portion to which an end of the grommet body is connected and which is larger than the first through hole;
a cover portion that extends tapered from the flange portion in the separation direction so as to cover a side of the grommet body that is away from the flange portion and that sandwiches a periphery of the second through hole between the flange portion and the cover portion;
and a cylindrical portion extending from a tapered end of the cover portion,
The cover portion is
A grommet provided with a deformation promoting portion that deforms a portion of the flange portion toward the separating direction when a pressing load is applied from the outside to the inside in a direction intersecting the separating direction. The cylindrical portion is
The shaft center is disposed to be shifted in a predetermined offset direction with respect to the center of the cover portion as viewed from the separating direction,
The cover portion is
The grommet according to claim 1 , wherein the deformation promoting portion is provided on a side opposite to the predetermined offset direction. The deformation promoting portion is
3. The grommet according to claim 1, wherein the grommet is formed in a cross section along the spacing direction so as to bulge outward from the inner side in the intersecting direction and have an apex. The top portion is
The grommet according to claim 3 , wherein the deformation promoting portion is provided at a substantial center in the separating direction. The cover portion is
The grommet according to claim 1 , wherein a groove portion is provided on an inner surface near the flange portion, the groove portion extending over the entire circumference of the cover portion in the circumferential direction. The cover portion is
The grommet according to claim 1 , further comprising a provisionally retaining portion that faces the deformation promoting portion and is provisionally retained on a periphery of the first through hole. The flange portion is
The grommet according to claim 1 , wherein a tapered surface is provided on an outer peripheral edge of the grommet body. The cylindrical portion is
The cover portion is formed in a shape extending in a predetermined bending direction,
The deformation promoting portion is
The grommet according to claim 1 , wherein the grommet is provided on a side opposite to the predetermined bending direction. The cylindrical portion is
The grommet according to claim 1 , further comprising a slit adjacent to the portion extending continuously from the deformation promoting portion and extending from the tip to the vicinity of the cover portion. A method for attaching a grommet including a grommet body into which a wire harness is inserted, the wire harness being routed across a first through hole of a first panel and a second through hole of a second panel, and an attachment portion provided at an end of the grommet body and attached to the second through hole, comprising:
an insertion process of inserting the cover portion and the tubular portion of the mounting portion, which is configured of a substantially annular flange portion to which an end of the grommet body is connected, a cover portion extending tapered from the flange portion in a separation direction so as to cover a side away from the flange portion toward a side opposite the grommet body, and a tubular portion extending from an end of the cover portion on the tapered side, into the first through hole toward the second panel;
a pulling process of pulling out the flange portion of the mounting portion, which is larger than the first through hole, from the second panel side;
an attachment process of attaching the attachment portion that has passed through the first through hole to the second panel by clamping a peripheral edge of the second through hole between the flange portion and the cover portion;
The drawing step includes:
A grommet installation method in which a deformation promoting portion of the cover portion receives a pressing load from the outside to the inside in a transverse direction that intersects the separation direction, deforming a portion of the flange portion toward the separation direction, thereby making it possible to pull the flange portion out of the first through hole.

Images