JP2023161365A - Grommet structure and wire harness producing method - Google Patents

Abstract

To provide a grommet structure that is adaptable to multiple specifications.SOLUTION: A grommet structure 1 includes one or more grommets 2. Each grommet 2 includes a hollow tubular portion 10 into which a wire W is inserted, and a hollow main body portion 20 that is extended from the tubular portion 10 and is fitted into a through hole Pa formed in a mounting target P. The main body portion 20 includes a recess 23 that has a groove shape in an outer side surface of the main body portion 20 and receives an edge portion of the through hole Pa, and a projection 26 that stands from an inner side surface of the main body portion 20 corresponding to the groove bottom of the recess 23. The stand height G1 of the projection 26 is equal to or smaller than the groove depth G2 of the recess 23. In a case where two or more grommets 2 are provided, one of adjacent grommets 2 is housed in the hollow of the other grommet 2, the tubular portion 10 of the one grommet 2 overlaps with the tubular portion 10 of the other grommet 2, and further, and the projection 26 of the other grommet 2 is housed in the recess 23 of the one grommet 2.SELECTED DRAWING: Figure 2

Description

The present invention relates to a grommet structure including one or more grommets, and a method of manufacturing a wire harness using the grommet structure.

Conventionally, for example, when wiring a bundle of electric wires constituting a wire harness so as to pass through a vehicle body panel (such as a dash panel) that partitions the inside and outside of a vehicle interior, it has been considered that the vehicle body panel has a A grommet may be attached to close the gap between the through hole and the wire bundle. A grommet generally has a cylindrical part through which an electric wire is inserted, and a main body part that is fitted into a through hole.The main body part presses into contact with the edge of the through hole, so that the main body part and the through hole are connected to each other. (For example, see Patent Document 1).

Japanese Patent Application Publication No. 2017-010638

Incidentally, depending on the specifications of the automobile in which the wire harness is mounted, the diameter of the through hole in the vehicle body panel or the like to which the grommet is attached may differ. For example, as the number of electrical components and power supplies that are electrically connected via a wire harness increases, the number of electric wires increases and the wire bundle becomes thicker, which tends to increase the diameter of the through hole. Therefore, in general, multiple types of grommets corresponding to such multiple specifications (for example, multiple types of grommets with body parts of different sizes for each through-hole diameter) are prepared in advance before manufacturing the wire harness. Sometimes grommets are selected to suit individual specifications. However, it is desirable to use a common grommet as much as possible to accommodate multiple specifications, since grommet part number management becomes complicated and the wire harness manufacturing process is streamlined.

One of the objects of the present invention is to provide a grommet structure and a method for manufacturing a wire harness that can accommodate multiple specifications.

In order to achieve the above-mentioned object, the grommet structure according to the present invention has the following features.

A grommet structure comprising one or more grommets,
Each of the one or more grommets is
A hollow cylindrical part that is elastically deformable in the radial direction and into which the electric wire is inserted, and a hollow main body from which the cylindrical part extends and is fitted into a through hole of the attachment target. has a section and a
The main body portion is
a groove-like groove section provided on the outer surface of the main body portion to receive the edge portion of the through hole; and a groove-shaped groove section provided on the inner surface of the main body section that stands up from a position corresponding to the groove bottom of the groove section. and a convex ridge portion,
The height of the protruding portion is equal to or less than the groove depth of the concave portion,
The grommet structure is
When a plurality of grommets are provided, the first grommet and the second grommet that are adjacent to each other are such that the second grommet is accommodated in the hollow of the first grommet, and the first grommet is The cylindrical part of the second grommet overlaps the cylindrical part of the grommet, and the protruding part of the first grommet is inserted into the concave part of the second grommet. arranged like this,
Must have grommet structure.

Furthermore, in order to achieve the above-mentioned object, the method for manufacturing a wire harness according to the present invention has the following features.

A method for manufacturing a wire harness having the grommet structure and an electric wire,
from the grommet structure having a plurality of grommets so that one grommet having the main body portion having a size corresponding to the diameter of the through hole to be attached is exposed to the outermost side. removing the other grommet on the outside;
inserting the electric wire into the cylindrical part of the grommet located at the innermost part of the grommet structure;
It must be a method for manufacturing wire harnesses.

According to the grommet structure and the method for manufacturing a wire harness of the present invention, when the grommet structure includes a plurality of grommets, a plurality of overlapping It has a mating structure. Therefore, from a grommet structure having multiple grommets, other grommets located outside of the grommet to be exposed are removed so that the grommet with the main body portion of the size corresponding to the diameter of the through-hole to be installed is exposed at the outermost side. By removing it, a grommet structure that can be properly fitted into the through hole can be constructed. Note that the larger the diameter of the through-hole, the larger the number of wires and the thicker the wire bundle. However, since the cylindrical part of the grommet can be elastically deformed, By expanding the cylindrical portion of the grommet, even such a thick bundle of wires can be properly inserted through the grommet structure. In this way, the grommet structure and wire harness manufacturing method of the present configuration eliminates the need to manage product numbers of multiple types of grommets each having a body portion of a different size for each through-hole diameter, as in the past. A single grommet structure can accommodate multiple specifications.

Furthermore, in the grommet structure of the present invention, the height of the protruding strips provided upright on the inner surface of the main body is equal to or less than the groove depth of the grooved strips provided on the outer surface of the main body. The protruding stripes of adjacent first grommets are properly inserted into the grooved stripes of the second grommet, so that they are engaged, and unintended separation of the grommets can be suppressed. In addition, since the cylindrical portion of the first grommet and the cylindrical portion of the second grommet overlap, it is possible to prevent water from entering through the gap between both grommets. In addition, since the protruding strip is provided upright at a position corresponding to the groove bottom of the groove, the rigidity of the groove and its surroundings increases, and the grommet structure may be unintentionally separated from the edge of the through hole. can be suppressed. In addition, the protrusions can prevent water from entering into the hollow of the grommet structure from the outside. In addition, even if the grommet structure is composed of only one grommet, the effect of increasing the rigidity of the grooved portion and its surroundings and the effect of suppressing the intrusion of water etc. will be exhibited as described above. .

The present invention has been briefly described above. Further, details of the present invention will become clearer by reading the detailed description described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a grommet structure according to an embodiment of the present invention. FIG. 2 is a main vertical cross-sectional view of the grommet structure shown in FIG. 1. FIG. 3 is an enlarged view of section A in FIG. 2. FIG. 4 is an enlarged view of section B in FIG. FIG. 5 corresponds to FIG. 2 in a case where the grommet on the outside of the grommet having a size corresponding to the diameter of the through hole in the vehicle body panel is removed and the grommet structure is constructed by overlapping a plurality of grommets. It is a diagram. FIG. 6 is a view corresponding to FIG. 2 in a case where the grommet on the outside of the grommet having a size corresponding to the diameter of the through hole in the vehicle body panel is removed and the grommet structure is composed of only the innermost grommet. It is. FIG. 7 is an enlarged view of section C in FIG. 6.

<Embodiment>
Hereinafter, a grommet structure 1 according to an embodiment of the present invention will be described with reference to the drawings. Typically, as shown in FIG. 1, etc., the grommet structure 1 is used when wiring a wire bundle W to pass through a vehicle body panel P (such as a dash panel) that partitions the inside and outside of the vehicle interior. It is used by being attached to the through hole Pa of the vehicle body panel P in order to close the gap between the through hole Pa of the panel P (see FIG. 2) and the wire bundle W. By passing the wire bundle W through the cylindrical portion 10 (described later) of the grommet structure 1, the wire harness 3 according to the embodiment of the present invention is obtained (see FIG. 1, etc.).

Hereinafter, for convenience of explanation, "upper" and "lower" will be defined as shown in FIG. 1 and the like. Note that the "vertical direction" is only defined for convenience of explanation, and does not necessarily correspond to the vertical direction of the vehicle when the grommet structure 1 is mounted on the vehicle. In the example shown in FIG. 1 and the like, the "upper" side corresponds to the inner side of the vehicle interior than the vehicle body panel P, and the "lower" side corresponds to the outside of the vehicle interior than the vehicle body panel P. That is, the "vertical direction" can be translated into "internal/internal direction." Further, as shown in FIG. 1 and the like, a direction perpendicular to the "vertical direction" is called a "radial" direction.

In this example, the grommet structure 1 includes a plurality of (five) grommets 2a, 2b, 2c, 2d, and 2e, as shown in FIGS. 1 and 2. Hereinafter, when there is no need to distinguish the grommets 2a, 2b, 2c, 2d, and 2e from each other, each may be simply referred to as "grommet 2."

As shown in FIGS. 1 and 2, in the grommet structure 1, the two adjacent grommets 2 are arranged so that the inner grommet 2 is accommodated in the hollow of the adjacent outer grommet 2, and the adjacent grommets 2 are overlapped with each other. It is designed so that it is possible. Specifically, the adjacent grommets 2a and 2b are designed such that the inner grommet 2b is accommodated in the hollow of the outer grommet 2a, allowing the grommets 2a and 2b to overlap each other. , 2c are designed such that the inner grommet 2c is accommodated in the hollow of the outer grommet 2b, allowing the grommets 2b, 2c to overlap each other, and the adjacent grommets 2c, 2d The design is such that the inner grommet 2d is housed in a hollow space and the grommets 2c and 2d can be overlapped, and the adjacent grommets 2d and 2e are designed so that the inner grommet 2e is housed in the hollow space of the outer grommet 2d. The grommets 2d and 2e are designed so that they can be overlapped with each other.

When the grommet structure 1 is used, the grommet 2 located inside of the grommet 2 among the five grommets 2 is removed so that the grommet 2 having a size corresponding to the outer diameter of the wire bundle W is located at the innermost side. In addition, of the five grommets 2, the grommets 2 located on the outer side of the grommet 2 are removed so that the grommet 2 having a size corresponding to the diameter of the through hole Pa of the vehicle body panel P is exposed at the outermost side. As a result, when in use, the grommet structure 1 may be constructed by stacking a plurality of grommets 2 (see FIGS. 2 and 5), or may be comprised of only a single grommet 2 (see FIG. 6). ) is also available. In this way, the grommet structure 1 is compatible with various specifications (specifically, various combinations of the outer diameter of the wire bundle W and the hole diameter of the through hole Pa of the vehicle body panel P).

Hereinafter, details of the shape of each grommet 2 constituting the grommet structure 1 will be described. The overall shape of each grommet 2 is the same as the overall shape of the other grommets 2, except for the radial and vertical dimensions of each element constituting the overall shape. Each grommet 2 is a molded product made of an elastic material (for example, rubber), and integrally includes a hollow cylindrical portion 10 and a hollow main body portion 20, as shown in FIG. The cylindrical portion 10 has a substantially cylindrical shape extending in the vertical direction. The cylindrical portion 10 is a portion that can be elastically deformed in the radial direction and through which the wire bundle W is inserted. An annular outer protrusion 11 that protrudes radially outward is provided on the outer surface of the open end (upper end) of the cylindrical portion 10 (see also FIG. 3). An annular inner protrusion 12 that protrudes radially inward is provided on the inner surface of the open end (upper end) of the cylindrical portion 10, and at a position adjacent to the lower side of the inner protrusion 12, By pressing the inner protrusion 12, an annular groove 13 recessed radially outward is formed (see also FIG. 3).

As shown in FIG. 2, the main body portion 20 includes a disk-shaped flange portion 21 that projects radially outward from the lower end of the cylindrical portion 10, and a cylindrical hanging portion 22 that extends downward from the outer peripheral edge of the flange portion 21. and has. An annular concave portion 23 recessed inward in the radial direction is provided at a substantially central position in the vertical direction on the outer surface of the hanging portion 22 (see also FIG. 4). The grooved portion 23 is a portion that is fitted into the edge of the through hole Pa of the vehicle body panel P.

At a position adjacent to the upper side of the grooved part 23 on the outer surface of the hanging part 22, there is a thickness (thickness in the radial direction) that is larger than the thickness (thickness in the radial direction) of the hanging part 22 at the groove bottom of the grooved part 23. An upper thick part 24 having a larger thickness (thickness) is provided at a position adjacent to the lower side of the grooved part 23 on the outer surface of the hanging part 22. (See also FIG. 4). An annular protruding strip 26 that protrudes radially inward is provided at a position in the vertical direction corresponding to the groove bottom of the grooved strip 23 on the inner surface of the hanging portion 22 . In each grommet 2, the protrusion height G1 of the protruding strip 26 is equal to or less than the groove depth G2 of the grooved strip 23 (see FIG. 7). Moreover, in this example, the protrusion height G1 of the convex line part 26 of the outer grommet 2 of the adjacent grommets 2 is the groove depth G2 of the concave line part 23 of the inner grommet 2 of the adjacent grommets 2. It is as follows. In this example, the groove depths G2 of the grooved portions 23 of each grommet 2 are substantially the same. Note that the groove depth G2 means the maximum value of the distance in the radial direction from the groove bottom of the grooved line 23 to the opening surface of the grooved line 23.

When the inner grommet 2 is housed in the hollow space of the adjacent outer grommet 2, as shown in FIGS. The cylindrical portions 10 of the inner grommet 2 overlap and the outer protrusion 11 of the inner grommet 2 fits into the groove 13 of the cylindrical portion 10 of the outer grommet 2, thereby forming the inner protrusion 12 of the outer grommet 2. The outer protrusion 11 of the inner grommet 2 contacts in the vertical direction (the axial direction of the cylindrical part 10), and the open end of the cylindrical part 10 of the outer grommet 2 contacts the cylindrical part of the inner grommet 2. It is arranged offset above the opening end of 10. That is, the length of the cylindrical portion 10 of each grommet 2 is determined so as to achieve such an arrangement relationship. In this way, since the inner protrusion 12 of the cylindrical part 10 of the adjacent outer grommet 2 and the outer protrusion 11 of the inner grommet 2 contact in the vertical direction, the gap between the overlapping cylindrical parts 10 is reduced. The intrusion of water etc. is suppressed. Note that, contrary to this example, the opening end of the cylindrical portion 10 of the outer grommet 2 is arranged to be offset downward from the opening end of the cylindrical portion 10 of the inner grommet 2. The length of the cylindrical portion 10 of the grommet 2 may be determined.

Furthermore, when the inner grommet 2 is housed in the hollow space of the adjacent outer grommet 2, as shown in FIGS. It is accommodated in the grooved part 23 of the inner grommet 2, and the inner surfaces of the upper and lower thick parts 24 and 25 of the outer grommet 2 are the same as those of the upper and lower thick parts 24 and 25 of the inner grommet 2. The protruding height G1 of the protruding stripes 26 of the outer grommet 2 that are in contact with the outer surface is less than or equal to the groove depth G2 of the grooved strips 23 of the inner grommet 2 (see FIG. 4). In this way, the protruding stripes 26 of the outer grommet 2 enter and engage with the grooved stripes 23 of the inner grommet 2, thereby suppressing unintended separation of two adjacent grommets 2 from each other. Furthermore, the inner surfaces of the upper and lower thick parts 24 and 25 of the outer grommet 2 contact the outer surfaces of the upper and lower thick parts 24 and 25 of the inner grommet 2, respectively, so that the inner grommet 2 is exposed to the outermost part. The upper and lower thick parts 24 and 25 of the grommet 2 are supported by the upper and lower thick parts 24 and 25 of the inner grommet 2, respectively. As a result, the grommet structure 1 can be firmly fixed to the vehicle body panel P when the edge of the through hole Pa of the vehicle body panel P is fitted into the groove 23 of the grommet 2 exposed to the outermost side. The details of the shape of each grommet 2 have been described above.

In the example shown in FIG. 2, the grommet structure 1 is arranged such that the grommet 2e having the cylindrical portion 10 having a size corresponding to the outer diameter of the wire bundle W is located at the innermost side, and the through hole Pa of the vehicle body panel P is All five grommets 2 are stacked one on top of the other so that the grommet 2a having the grooved portion 23 having a size corresponding to the hole diameter is exposed at the outermost side. In this example, the wire harness 3 including the grommet structure 1 and the wire bundle W is constructed by inserting the wire bundle W into the cylindrical portion 10 of the innermost grommet 2e using a jig such as a grommet switch. The grommet structure 1 is fixed to the vehicle body panel P by fitting the edge of the through hole Pa of the vehicle body panel P into the grooved portion 23 of the grommet 2a exposed to the outermost side. What is the vertical position of the edge of the through hole Pa of the vehicle body panel P fitted into the grooved line 23 of the grommet 2a exposed at the outermost side, and the vertical position of the convex line 26 of the grommet 2a exposed at the outermost side? , are almost in agreement (see Fig. 4). Note that the cylindrical portion 10 of the grommet 2a exposed to the outermost side and the wire bundle W may be co-wound using tape (not shown). As a result, the cylindrical portions 10 of the five grommets 2 are brought into even stronger contact with each other, so that water and the like are further prevented from entering the gaps between the overlapping cylindrical portions 10.

In the example shown in FIG. 2, since the protruding part 26 is erected on the inner surface of the hanging part 22 corresponding to the groove bottom of the concave part 23 of the grommet 2a exposed to the outermost side, the concave part of the grommet 2a The overall rigidity of the grommet 23 is increased, and the grommet structure 1 can be firmly fixed to the vehicle body panel P by fitting the edge of the through hole Pa into the groove 23 of the grommet 2a. In addition, the convex strips 26 of the outer grommets 2 enter and engage with the grooves 23 of the adjacent inner grommets 2, so that the grommets 2 (specifically, the grommets 2a and 2b, and the grommets 2b) , 2c, grommets 2c and 2d, and grommets 2d and 2e). In addition, the inner surfaces of the upper and lower thick parts 24 and 25 of the adjacent outer grommets 2 are in contact with the outer surfaces of the upper and lower thick parts 24 and 25 of the inner grommet 2, respectively. Therefore, the upper and lower thick parts 24 and 25 of the grommet 2a exposed to the outermost side are supported by the upper and lower thick parts 24 and 25 of the plurality of inner grommets 2b, 2c, 2d, and 2e, respectively. Therefore, the grommet structure 1 can be firmly fixed to the vehicle body panel P. Further, the inner protrusion 12 of the adjacent outer grommet 2 and the outer protrusion 11 of the inner grommet 2 are in contact with each other in the vertical direction (axial direction of the cylindrical part 10). Therefore, the cylindrical portions 10 that overlap each other (specifically, the cylindrical portions 10 of the grommets 2a and 2b, the cylindrical portions 10 of the grommets 2b and 2c, the cylindrical portions 10 of the grommets 2c and 2d, and , the cylindrical portions 10 of the grommets 2d, 2e). Furthermore, since the inner protrusion 12 at the open end of the cylindrical portion 10 of the grommet 2e located at the innermost side is in close contact with the outer peripheral surface of the wire bundle W, the open end of the cylindrical portion 10 of the grommet 2e and the wire bundle W are in close contact with each other. This prevents water from entering the gap between the

In the example shown in FIG. 5, the grommet structure 1 is arranged such that the grommet 2e having the cylindrical portion 10 having a size corresponding to the outer diameter of the wire bundle W is located at the innermost side, and the through hole Pa of the vehicle body panel P Grommets 2a and 2b are removed and three grommets 2c, 2d, and 2e are stacked on top of each other so that grommet 2c having grooved portion 23 having a size corresponding to the hole diameter is exposed at the outermost side. There is. In this example, the wire harness 3 including the grommet structure 1 and the wire bundle W is constructed by inserting the wire bundle W into the cylindrical portion 10 of the innermost grommet 2e using a jig such as a grommet switch. The grommet structure 1 is fixed to the vehicle body panel P by fitting the edge of the through hole Pa of the vehicle body panel P into the concave strip 23 of the grommet 2c exposed to the outermost side. What is the vertical position of the edge of the through hole Pa of the vehicle body panel P fitted into the grooved line 23 of the grommet 2c exposed at the outermost side, and the vertical position of the convex line 26 of the grommet 2c exposed at the outermost side? , are almost in agreement (see FIG. 5). Note that the tubular portion 10 of the grommet 2c exposed to the outermost side and the wire bundle W may be co-wound using tape (not shown). As a result, the cylindrical portions 10 of the three grommets 2 are brought into even stronger contact with each other, so that water and the like are further prevented from entering the gaps between the overlapping cylindrical portions 10. Since the functions and effects of the grommet structure 1 shown in FIG. 5 are the same as those of the grommet structure 1 shown in FIG. 2, their explanation will be omitted.

In the example shown in FIG. 6, the grommet structure 1 is arranged such that the grommet 2e having the cylindrical portion 10 having a size corresponding to the outer diameter of the wire bundle W is located at the innermost side, and the through hole Pa of the vehicle body panel P The grommet 2a, 2b, 2c, and 2d are removed so that the grommet 2e having the grooved portion 23 of a size corresponding to the hole diameter is exposed at the outermost side, and is composed of only a single grommet 2e. . In this example, the wire harness 3 including the grommet structure 1 and the wire bundle W is constructed by inserting the wire bundle W into the cylindrical portion 10 of the innermost grommet 2e using a jig such as a grommet switch. The grommet structure 1 is fixed to the vehicle body panel P by fitting the edge of the through hole Pa of the vehicle body panel P into the grooved portion 23 of the grommet 2e exposed to the outermost side. What is the vertical position of the edge of the through hole Pa of the vehicle body panel P fitted into the grooved line 23 of the grommet 2e exposed at the outermost side, and the vertical position of the convex line 26 of the grommet 2e exposed at the outermost side? , are almost in agreement (see FIG. 6). Note that the tubular portion 10 of the grommet 2e exposed to the outermost side and the wire bundle W may be co-wound using tape (not shown).

In the example shown in FIG. 6, since the protruding part 26 is erected on the inner surface of the hanging part 22 corresponding to the groove bottom of the grooved part 23 of the grommet 2e exposed to the outermost side, the concave part of the grommet 2e The overall rigidity of the grommet 23 is increased, and the grommet structure 1 can be firmly fixed to the vehicle body panel P by fitting the edge of the through hole Pa into the groove 23 of the grommet 2e. In addition, since the inner protrusion 12 at the open end of the cylindrical portion 10 of the grommet 2e located at the innermost side is in close contact with the outer peripheral surface of the wire bundle W, the open end of the cylindrical portion 10 of the grommet 2e and the wire bundle W are in close contact with each other. Water and the like are prevented from entering the gap between the W and the W. In addition, the presence of the upper and lower thick parts 24 and 25 in the vertically adjacent positions of the grooved part 23 in the hanging part 22 of the grommet 2e exposed to the outermost side has the effect of increasing the rigidity of the grommet 2e itself. is also demonstrated.

<Action/Effect>
As explained above, the grommet structure 1 is constructed by stacking a plurality of grommets 2 so that the inner grommets 2 are accommodated in the hollows of the adjacent outer grommets 2. Therefore, by removing the grommet 2 on the outer side of the grommet 2 so that the grommet 2 having the outer diameter corresponding to the diameter of the through-hole Pa of the vehicle body panel P is exposed at the outermost side, the grommet 2 can be properly attached to the through-hole Pa. Structure 1 can be attached.

Furthermore, since the protruding part 26 is provided upright on the inner surface of the main body part 20 corresponding to the groove bottom of the concave part 23, the overall rigidity of the concave part 23 is increased, and the edge of the through hole Pa is By fitting into the grooved portion 23, the grommet structure 1 can be firmly fixed to the vehicle body panel P. In addition, since the height G1 of the protruding portion 26 is less than or equal to the groove depth G2 of the grooved portion 23, the protruding portion 26 can enter and engage with the grooved portion 23 of the adjacent grommet 2. Therefore, unintended separation of the grommets 2 can be suppressed. Note that even when there is only one grommet 2, the same effect of increasing the rigidity of the grooved portion 23 is exerted.

Furthermore, since the thick parts 24 and 25 of adjacent grommets 2 are in contact with each other, by fitting the edge of the through hole Pa into the grooved part 23 of the grommet 2 exposed at the outermost side, The thickened portions 24 and 25 of the grommet 2 thus formed are supported by the thickened portions 24 and 25 of the inner grommet 2. Therefore, the grommet structure 1 can be firmly fixed to the vehicle body panel P. Note that even when there is only one grommet 2, the presence of the thick portions 24 and 25 has the effect of increasing the rigidity of the grommet 2 itself.

Furthermore, since the inner protrusion 12 and the outer protrusion 11 provided at the open ends of the cylindrical parts 10 of adjacent grommets 2 contact in the axial direction of the cylindrical parts 10, the overlapping cylindrical parts 10 This prevents water from entering the gaps between the two. Note that even when there is only one grommet 2, the presence of the inner protrusion 12 at the open end of the cylindrical portion 10 closes the gap between the open end and the wire bundle W. The effect of suppressing water and the like from entering the portion 10 is exhibited. As described above, the grommet structure 1 according to the present embodiment is compatible with various specifications.

<Other aspects>
Note that the present invention is not limited to the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the embodiments described above, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiments are arbitrary as long as the present invention can be achieved, and are not limited.

Here, the features of the embodiments of the method for manufacturing the grommet structure 1 and wire harness 3 according to the present invention described above will be briefly summarized and listed below in [1] to [6].

[1]
A grommet structure (1) comprising one or more grommets (2),
Each of the one or more grommets (2) is
A hollow cylindrical part (10) that is elastically deformable in the radial direction and into which the electric wire (W) is inserted, and the cylindrical part (10) extends and the attachment target (P) has It has a hollow main body part (20) to be fitted into the through hole (Pa),
The main body portion (20) is
A groove-shaped concave portion (23) provided on the outer surface of the main body portion (20) to receive the edge portion of the through hole (Pa); It has a protruding strip (26) that stands up from a position corresponding to the groove bottom of the strip (23),
The height (G1) of the protruding portion (26) is equal to or less than the groove depth (G2) of the concave portion (23);
The grommet structure (1) is
When a plurality of the grommets (2) are provided, the first grommet (2) and the second grommet (2) that are adjacent to each other are arranged in the hollow of the first grommet (2). A grommet (2) is accommodated, and the cylindrical part (10) of the second grommet (2) overlaps the cylindrical part (10) of the first grommet (2), and arranged such that the protruding portion (26) of the first grommet (2) is inserted into the concave portion (23) of the second grommet (2);
Grommet structure (1).

When the grommet structure having the configuration [1] above includes a plurality of grommets, the grommet structure has an overlapping structure in which a second grommet is accommodated in a hollow space of an adjacent first grommet. Therefore, from a grommet structure having multiple grommets, other grommets located outside of the grommet to be exposed are removed so that the grommet with the main body portion of the size corresponding to the diameter of the through-hole to be installed is exposed at the outermost side. By removing it, a grommet structure that can be properly fitted into the through hole can be constructed. Note that the larger the diameter of the through-hole, the larger the number of wires and the thicker the wire bundle. However, since the cylindrical part of the grommet can be elastically deformed, By expanding the cylindrical portion of the grommet, such a thick bundle of wires can be properly inserted through the grommet structure. In this way, the grommet structure of this configuration eliminates the need to manage product numbers for multiple types of grommets that have body parts of different sizes for each through-hole diameter, as in the past, and allows a single grommet structure to be used. can accommodate multiple specifications.

Furthermore, by setting the height of the protruding strips erected on the inner surface of the main body to be less than or equal to the groove depth of the grooves provided on the outer surface of the main body, the adjacent first grommets can be The protruding stripes are properly inserted into the grooved stripes of the second grommet, and the two engage, thereby suppressing unintentional separation of the grommets. In addition, since the cylindrical portion of the first grommet and the cylindrical portion of the second grommet overlap, it is possible to prevent water from entering through the gap between both grommets. In addition, since the protruding strip is provided upright at a position corresponding to the groove bottom of the groove, the rigidity of the groove and its surroundings increases, and the grommet structure may be unintentionally separated from the edge of the through hole. can be suppressed. In addition, the protrusions can prevent water from entering into the hollow of the grommet structure from the outside. In addition, even if the grommet structure is composed of only one grommet, the effect of increasing the rigidity of the groove and its surroundings and the effect of suppressing the intrusion of water etc. will be exhibited as described above. .

[2]
A grommet structure (1) comprising one or more grommets (2),
Each of the one or more grommets (2) is
A hollow cylindrical part (10) that is elastically deformable in the radial direction and into which the electric wire (W) is inserted, and the cylindrical part (10) extends and the attachment target (P) has It has a hollow main body part (20) to be fitted into the through hole (Pa),
The main body portion (20) is
A groove-shaped concave portion (23) provided on the outer surface of the main body portion (20) to receive the edge portion of the through hole (Pa), and a groove portion (23) that is provided on the outer surface of the main body portion (20) to receive the edge portion of the through hole (Pa); A pair of thick parts (24, 25) that are provided to sandwich the grooved part (23) in the fitting direction, and are thicker than the main body part (20) at the groove bottom of the grooved part (23). A pair of thick parts (24, 25) in which the main body part (20) is thick in the thick parts (24, 25),
The grommet structure (1) is
When a plurality of the grommets (2) are provided, the first grommet (2) and the second grommet (2) that are adjacent to each other are arranged in the hollow of the first grommet (2). A grommet (2) is accommodated, and the cylindrical part (10) of the second grommet (2) overlaps the cylindrical part (10) of the first grommet (2), and The inner surface of the thick portion (24, 25) of the first grommet (2) contacts the outer surface of the thick portion (24, 25) of the second grommet (2). placed in
Grommet structure (1).

According to the grommet structure having the configuration [2] above, similar to [1] above, a plurality of grommets are arranged so that the grommet having the main body portion having a size corresponding to the diameter of the through hole to be attached is exposed at the outermost side. By removing other grommets located outside the exposed grommet from the grommet structure having the grommet structure, a grommet structure that can be properly fitted into the through hole can be constructed.

Furthermore, since the cylindrical portion of the first grommet and the cylindrical portion of the second grommet overlap, it is possible to prevent water from entering through the gap between both grommets. In addition, since the thick part of the first grommet and the thick part of the second grommet that are adjacent to each other are in contact with each other, the grooved part of the grommet exposed at the outermost side of the grommet structure can be fitted into the through hole. In this case, the thick part of the grommet exposed at the outermost side is supported by the thick part of the grommet located inside. As a result, the rigidity of the grooved portion and its surroundings is increased, and it is possible to prevent the grommet structure from unintentionally separating from the edge portion of the through hole. In addition, even if the grommet structure is composed of only one grommet, the presence of a pair of thick parts sandwiching the grooved part has the effect of increasing the rigidity of the grooved part and its surroundings. will be done.

[3]
A grommet structure (1) comprising one or more grommets (2),
Each of the one or more grommets (2) is
A hollow cylindrical part (10) that is elastically deformable in the radial direction and into which the electric wire (W) is inserted, and the cylindrical part (10) extends and the attachment target (P) has It has a hollow main body part (20) to be fitted into the through hole (Pa),
The cylindrical part (10) is
an outer protrusion (11) provided on the outer surface of the open end of the cylindrical portion (10) and protruding radially outward of the cylindrical portion (10); and an outer protrusion (11) provided on the inner surface of the open end. and an inner protrusion (12) protruding radially inward of the cylindrical part (10),
The grommet structure (1) is
When a plurality of the grommets (2) are provided, the first grommet (2) and the second grommet (2) that are adjacent to each other are arranged in the hollow of the first grommet (2). A grommet (2) is accommodated, and the cylindrical part (10) of the second grommet (2) overlaps the cylindrical part (10) of the first grommet (2), and The inner protrusion (12) of the first grommet (2) and the outer protrusion (11) of the second grommet (2) contact in the axial direction of the cylindrical part (10). arranged like this,
Grommet structure (1).

According to the grommet structure configured in [3] above, as in [1] above, a plurality of grommets are arranged such that the grommet having the main body portion having a size corresponding to the diameter of the through hole to be attached is exposed at the outermost side. By removing other grommets located outside the exposed grommet from the grommet structure having the grommet structure, a grommet structure that can be properly fitted into the through hole can be constructed.

Furthermore, since the cylindrical portion of the first grommet and the cylindrical portion of the second grommet overlap, it is possible to prevent water from entering through the gap between both grommets. In addition, the inner protrusion provided at the open end of the cylindrical portion of the first grommet and the outer protrusion provided at the open end of the cylindrical portion of the second grommet, Since they contact in the axial direction, water and the like can be further suppressed from entering the gap between the overlapping cylindrical parts. Note that even if the grommet structure is composed of only one grommet, the presence of the inner protrusion at the open end of the cylindrical part reduces the gap between the open end and the electric wire. Therefore, the effect of suppressing water and the like from entering the cylindrical portion is exhibited.

[4]
In the grommet structure (1) according to any one of [1] to [3] above,
When a plurality of grommets (2) are provided, the open end of the cylindrical portion (10) of the first grommet (2) and the open end of the second grommet (2) arranged so as to be offset in the axial direction of the cylindrical part (10),
Grommet structure (1).

According to the grommet structure having the configuration [4] above, the opening end of the cylindrical portion of the first grommet and the opening end of the second grommet are arranged so as to be offset in the axial direction of the cylindrical portion. Ru. Therefore, when removing some grommets from multiple grommets according to the hole diameter of the through-hole, you can check the number of grommets stacked one on top of the other by looking at the offset location at the opening end of the cylindrical part. It can be easily confirmed and work efficiency is improved.

[5]
A method for manufacturing a wire harness (3) comprising the grommet structure (1) according to any one of [1] to [3] above and an electric wire (W),
A plurality of the grommets ( 2) removing the other grommet (2) located outside the one grommet (2) from the grommet structure (1);
a step of inserting the electric wire (W) into the cylindrical part (10) of the grommet (2) located at the innermost part of the grommet structure (1);
Method for manufacturing wire harness (3).

In the method for manufacturing a wire harness having the configuration of [5] above, when the grommet structure includes a plurality of grommets, the grommet structure is arranged such that a second grommet is housed in a hollow of an adjacent first grommet. Has a structure. Therefore, from a grommet structure having multiple grommets, other grommets located outside of the grommet to be exposed are removed so that the grommet with the main body portion of the size corresponding to the diameter of the through-hole to be installed is exposed at the outermost side. By removing it, a grommet structure that can be properly fitted into the through hole can be constructed. Note that the larger the diameter of the through-hole, the larger the number of wires and the thicker the wire bundle. However, since the cylindrical part of the grommet can be elastically deformed, By expanding the cylindrical portion of the grommet, such a thick bundle of wires can be properly inserted through the grommet structure. In this way, the method for manufacturing a wire harness with this configuration eliminates the need to manage the product numbers of multiple types of grommets that have body parts of different sizes for each through-hole diameter, as in the conventional method, and allows the production of a single grommet. The structure can be used to accommodate multiple specifications.

[6]
In the method for manufacturing the wire harness (3) according to [5] above,
After the step of inserting the electric wire (W), the method further includes a step of co-winding the cylindrical portion (10) of the one grommet (2) and the electric wire (W) using a tape-shaped component. ,
Method of manufacturing wire harness.

According to the method for manufacturing a wire harness having the configuration described in [6] above, the outermost exposed cylindrical portion of the grommet and the electric wire are co-wound using a tape-shaped component. As a result, the plurality of cylindrical parts are brought into even stronger contact with each other, so that water and the like can be more effectively suppressed from entering the gaps between the overlapping cylindrical parts.

1 Grommet structure 2 Grommet 3 Wire harness 10 Cylindrical part 11 Outer protrusion 12 Inner protrusion 20 Main body part 23 Concave part 24 Upper thick part (thick part)
25 Lower thick part (thick part)
26 Convex part P Vehicle body panel (to be installed)
Pa Through hole W Wire bundle (wire)

Claims (6)

A grommet structure comprising one or more grommets,
Each of the one or more grommets is
A hollow cylindrical part that is elastically deformable in the radial direction and into which the electric wire is inserted, and a hollow main body from which the cylindrical part extends and is fitted into a through hole of the attachment target. has a section and a
The main body portion is
a groove-like groove section provided on the outer surface of the main body portion to receive the edge portion of the through hole; and a groove-shaped groove section provided on the inner surface of the main body section that stands up from a position corresponding to the groove bottom of the groove section. and a convex ridge portion,
The height of the protruding portion is equal to or less than the groove depth of the concave portion,
The grommet structure is
When a plurality of grommets are provided, the first grommet and the second grommet that are adjacent to each other are such that the second grommet is accommodated in the hollow of the first grommet, and the first grommet is The cylindrical part of the second grommet overlaps the cylindrical part of the grommet, and the protruding part of the first grommet is inserted into the concave part of the second grommet. arranged like this,
Grommet structure. A grommet structure comprising one or more grommets,
Each of the one or more grommets is
A hollow cylindrical part that is elastically deformable in the radial direction and into which the electric wire is inserted, and a hollow main body from which the cylindrical part extends and is fitted into a through hole of the attachment target. has a section and a
The main body portion is
a groove-shaped recess provided on the outer surface of the main body to receive the edge portion of the through hole; and a pair of grooves provided to sandwich the recess in the direction in which the main body is fitted into the through hole. a pair of thick parts, the main body part being thicker at the thick part than the main body part at the groove bottom of the grooved part;
The grommet structure is
When a plurality of grommets are provided, the first grommet and the second grommet that are adjacent to each other are such that the second grommet is accommodated in the hollow of the first grommet, and the first grommet is The cylindrical portion of the second grommet overlaps the cylindrical portion of the second grommet, and the inner surface of the thick portion of the first grommet and the outer surface of the thick portion of the second grommet overlap. placed in such a way that it makes contact with the sides,
Grommet structure. A grommet structure comprising one or more grommets,
Each of the one or more grommets is
A hollow cylindrical part that is elastically deformable in the radial direction and into which the electric wire is inserted, and a hollow main body from which the cylindrical part extends and is fitted into a through hole of the attachment target. has a section and a
The cylindrical part is
an outer protrusion provided on the outer surface of the open end of the cylindrical portion and protruding radially outward of the cylindrical portion; and an outer protrusion provided on the inner surface of the open end and radially inner of the cylindrical portion. and an inner protrusion protruding into the
The grommet structure is
When a plurality of grommets are provided, the first grommet and the second grommet that are adjacent to each other are such that the second grommet is accommodated in the hollow of the first grommet, and the first grommet is The cylindrical portion of the second grommet overlaps the cylindrical portion of the second grommet, and the inner protrusion of the first grommet and the outer protrusion of the second grommet overlap the cylindrical portion of the second grommet. arranged so as to be in contact with each other in the axial direction of the parts;
Grommet structure. In the grommet structure according to any one of claims 1 to 3,
When a plurality of grommets are provided, the opening end of the cylindrical portion of the first grommet and the opening end of the second grommet are arranged so as to be offset in the axial direction of the cylindrical portion. be done,
Grommet structure. A method for manufacturing a wire harness comprising the grommet structure according to any one of claims 1 to 3 and an electric wire,
from the grommet structure having a plurality of grommets so that one grommet having the main body portion having a size corresponding to the diameter of the through hole to be attached is exposed to the outermost side. removing the other grommet on the outside;
inserting the electric wire into the cylindrical part of the grommet located at the innermost part of the grommet structure;
Method of manufacturing wire harness. A method for manufacturing a wire harness according to claim 5, comprising:
After the step of inserting the electric wire, further comprising the step of co-wound the cylindrical part of the one grommet and the electric wire using a tape-shaped part.
Method of manufacturing wire harness.

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