JP2023169496A - grommet - Google Patents

Abstract

To reduce initial cost.SOLUTION: A grommet has a main body 10 that has one insertion groove 11 obtained by dividing an insertion path 1a into two in a routing axis direction, a movable body 20 that has the other insertion groove 21, a hinge 50 that relatively rotates these bodies between an open state and a closed state, and a lip 70 that projects from inner peripheral surfaces 11b, 21b of the insertion grooves, brings the respective ends 71a, 71b into contact with each other in the closed state to form an internal slit 63, and becomes a cantilever cylinder to adhere to an outer peripheral surface of a routing material We. The inner peripheral surface of the insertion path has adhesion surfaces 11c, 21c that adhere to the outer peripheral surface of a reference routing material We0, and the lip becomes a truncated cone cylinder with a fixing end side as a lower base 73a in the closed state without the routing material, becomes a cylinder having an increased diameter part 74 spread out in the routing material according to the diameter of the routing material in the closed state with the routing material, and increases the width of the internal slit in the open state to expose an inner wall surface 72 from the internal slit.SELECTED DRAWING: Figure 5

Description

The present invention relates to grommets.

Conventionally, when passing a wiring material such as an electric wire through an insertion part such as a through hole or groove between two spaces, a grommet is placed in the insertion part to protect the wiring material from the periphery of the insertion part. may be done. The grommet may be made liquid-proof to prevent liquids such as water from passing between the two spaces through the insertion portion. For example, this type of grommet is disclosed in Patent Document 1 below.

Japanese Patent Application Publication No. 2009-106091

Here, wiring materials of different diameter sizes may be passed through the insertion portion depending on different specifications. For example, to accommodate this, conventional grommets are prepared as dedicated products for each wiring material having a different diameter. For this reason, it is difficult to reduce the cost of conventional grommets.

Therefore, an object of the present invention is to provide a grommet that can reduce the cost.

In the present invention, the insertion passage through which the straight part of the wiring material is inserted has one insertion groove divided into two in the direction of the wiring axis of the straight part, and the opening of the one insertion groove is used for the wiring. a main body that serves as an insertion port for the wiring material; a movable body that has the other insertion groove divided into two in the insertion passage, and that uses the opening of the other insertion groove as the insertion port for the wiring material; and a hinge that connects the movable body and rotates the main body and the movable body relative to each other between an open state and a closed state around a rotation axis extending in the direction of the wiring axis; The wiring member is made to protrude from the inner circumferential surface of the insertion groove, and in the closed state, the respective ends around the axis of the wiring material are brought into contact with each other to form an internal slit between the ends, and the wiring shaft is a lip that forms a cantilevered cylindrical body whose direction is the cylindrical axis direction and is in close contact with the outer peripheral surface of the wiring material over one circumference, and the main body and the movable body are arranged in the closed state to an external slit is formed between the respective ends of the wiring material around the axis thereof in contact with each other, and the insertion openings of the one insertion groove and the other insertion groove are formed in the closed state; are combined to form the insertion passage, and in the open state, the width of the external slit is expanded to expose the insertion opening of each insertion groove from the external slit, and the inner circumferential surface of the insertion passage is , the lip has a truncated conical shape in which the fixed end side becomes the lower base in the closed state without the wiring material; , and has an enlarged diameter portion that is pushed out according to the diameter of the wiring material between the lower base and the upper base when the wiring material is in the closed state with the wiring material present. In the open state, the width of the internal slit is expanded to expose the internal wall surface from the internal slit.

The grommet according to the present invention can protect the wiring material having a thickness between the reference diameter of the reference wiring material and the minimum diameter with the lip, and the wiring material having the thickness between that and the insertion path. It is possible to improve the liquid resistance between the For this reason, this grommet does not have to be prepared as a special product for each wiring material with a different diameter, and if the wiring material has a diameter within this range, it will protect the wiring material and improve the liquid resistance between the insertion path. can be covered by one. Therefore, the grommet according to the present invention can be used in common with wiring materials of different diameter sizes, and the cost can be reduced.

FIG. 1 is a perspective view showing a grommet in a closed state according to an embodiment. FIG. 2 is a perspective view of the grommet in the closed state of the embodiment viewed from a different angle. FIG. 3 is a plan view of the grommet in the closed state of the embodiment, viewed from the protruding body side. FIG. 4 is a plan view of the grommet in the closed state of the embodiment, viewed from the lip side. FIG. 5 is a perspective view showing the grommet in an open state according to the embodiment. FIG. 6 is a perspective view of the grommet in the open state of the embodiment viewed from a different angle. FIG. 7 is a plan view of the grommet in an open state according to the embodiment, viewed from the protruding body side. FIG. 8 is a plan view of the grommet in the open state of the embodiment, viewed from the lip side. FIG. 9 is a cross-sectional view taken along the line XX in FIG. 3. FIG. 10 is a plan view of the grommet in the closed state of the embodiment, viewed from the connecting body side. FIG. 11 is a sectional view taken along the YY line in FIG. 4. FIG. 12 shows the lip to which the reference wiring material is assembled. FIG. 13 shows a lip to which a wiring material having a thickness smaller than the diameter of the reference wiring material is assembled.

EMBODIMENT OF THE INVENTION Below, embodiment of the grommet based on this invention is described in detail based on drawing. Note that the present invention is not limited to this embodiment.

[Embodiment]
One embodiment of the grommet according to the present invention will be described based on FIGS. 1 to 13.

Reference numeral 1 shown in FIGS. 1 to 13 indicates a grommet of this embodiment. This grommet 1 is arranged in a through hole (hereinafter referred to as "wiring material insertion hole") through which the wiring material We (FIG. 1) is passed between two spaces, and This protects the wiring material We from the peripheral edge of the cable insertion hole, and prevents liquid such as water from flowing back and forth between the two spaces through the gap between the peripheral edge and the wiring material We. Therefore, this grommet 1 is molded from a flexible synthetic resin material such as synthetic rubber. Here, the wiring material We is, for example, an electric wire (an electric wire as a communication line, an electric wire as a power supply line, etc.). Further, the partition wall between the two spaces may be, for example, a plate-shaped member such as a panel of a vehicle body, or a wall of a storage box such as an electrical connection box.

The grommet 1 includes a grommet main body 1A in which an insertion passage 1a through which a straight portion of the wiring material We is inserted is formed, and a connecting body 1B connected to the grommet main body 1A outside the grommet main body 1A (see FIG. 1 to Figure 8).

This grommet 1 has its connecting body 1B placed in the wiring material insertion hole, and is held at this location via the connecting body 1B. For example, when the grommet 1 is attached to a storage box, the storage box includes a box body provided with an insertion opening for inserting the object to be stored, and a cover that closes the insertion opening. In this storage box, by covering the opening of the notch on the insertion port side in the wall of the box body with a cover, the notch is used as a wiring material insertion hole. In addition, the wall of the box body has a chamber with a wall protruding from the periphery of the notch to both space sides (internal space side of the box body and space side outside the box body). Accommodating chambers may be formed in which cable material insertion holes are respectively provided on both space sides. In this storage box, the two wiring material insertion holes are arranged opposite to each other in the axial direction of the straight part of the wiring material We (hereinafter referred to as "the wiring axis direction"), and the connecting body 1B is placed in the storage chamber. The connecting body 1B is housed in this housing chamber.

The grommet main body 1A has one insertion groove 11 in which the insertion passage 1a is divided into two parts in the wiring axis direction of the straight part of the wiring material We, and the opening of the one insertion groove 11 is connected to the wiring material We. A movable body 20 having a main body 10 serving as an insertion opening 11a and the other insertion groove 21 divided into two in the insertion passage 1a, and with the opening of the other insertion groove 21 serving as the insertion opening 21a for the wiring material We. (Figs. 1 to 9). In this grommet main body 1A, a connecting body 1B is connected to one end in the wiring axis direction. The grommet main body 1A has a protrusion 30 coaxially protruding from the other end of the main body 10 in the wiring axis direction (FIGS. 1 to 8).

The main body 10 shown here has one of the insertion grooves 11 at two locations, with the directions of the respective wiring axes aligned. Each of the insertion grooves 11 extends to the end of the protruding body 30 in the protruding direction (FIGS. 1, 2, 5, and 6). Moreover, the movable body 20 shown here is provided for each insertion passage 1a (that is, for each insertion groove 11).

The connecting body 1B includes a first connecting body 41 connected to one end of the main body 10 in the wiring axis direction, and a second connecting body 42 of each movable body 20 connected to one end of the movable body 20 in the wiring axis direction. , (FIGS. 2 and 4 to 8).

The grommet 1 connects the main body 10 and the movable body 20, connects the first connecting body 41 and the second connecting body 42, and is movable between the main body 10 and the movable body around a rotating shaft extending in the direction of the wiring axis. It has a hinge 50 that allows the body 20, the first connecting body 41, and the second connecting body 42 to rotate relative to each other between an open state and a closed state (FIGS. 2 and 4 to 9). This hinge 50 is provided for each combination of the movable body 20 and the second connecting body 42. That is, in this grommet 1, the main body 10 and the movable body 20 are integrated through the hinge 50, and the protruding body 30 is attached to the main body 10, the two movable bodies 20, and parts of the two hinges 50. The grommet main body 1A is formed by adding the above. In addition, in this grommet 1, the first connecting body 41 and the second connecting body 42 are integrated through the hinge 50, and the first connecting body 41, the two second connecting bodies 42, and the two The connecting body 1B is formed by the rest of the hinge 50.

In the grommet 1, by providing the hinge 50, the main body 10, the movable body 20, and the first connecting body 41 and the second connecting body 42 are arranged in the following positional relationship in the closed state and the open state.

The main body 10 and the movable body 20 have the first outer slit formed by bringing the respective ends (hereinafter referred to as "first external slit periphery") 12 and 22 of the wiring material We into contact with each other around the axis in the closed state. An external slit (hereinafter referred to as "first external slit") 61 is formed between the external slit peripheral parts 12 and 22 (FIGS. 1 to 3 and 5 to 9). This first external slit 61 is provided for each movable body 20. In the closed state, the main body 10 and the movable body 20 form an insertion passage 1a by aligning the insertion openings 11a and 21a of the insertion groove 11 on one side and the insertion groove 21 on the other side. The main body 10 and the two movable bodies 20 have a rectangular external appearance when in the closed state.

The first connecting body 41 and the two second connecting bodies 42 touch each other at the ends 42a and 42b of the two second connecting bodies 42 (hereinafter referred to as "second external slit periphery") in the closed state. An external slit (hereinafter referred to as "second external slit") 62 is formed between the second external slit peripheral parts 42a and 42b which are in contact with each other (FIGS. 1 to 9). The first connecting body 41 and the two second connecting bodies 42 form an annular body in a closed state. Here, when the first connecting body 41 and the two second connecting bodies 42 are in the closed state, they form a rectangular ring-shaped connecting body 1B. Furthermore, when the first connecting body 41 and the two second connecting bodies 42 are closed, the inner space of the annular body becomes a communicating path 1b that connects the two insertion paths 1a (FIGS. 2 and 5 to 7). ). This communication path 1b is also a space that allows the two insertion paths 1a to communicate with one of the two spaces (in this case, the internal space of the box body).

In this grommet 1, the two first external slits 61 and the second external slits 62 are formed as one trifurcated slit with one end of each gathered in one place in the closed state (FIGS. 3 and 7). ). Here, one Y-shaped slit is formed as if the second external slit 62 was branched into two first external slits 61.

On the other hand, in the open state, the main body 10 and the movable body 20 expand the width of the first external slit 61 to expose the insertion openings 11a and 21a of the respective insertion grooves 11 and 21 from the first external slit 61, and the main body 10 and the movable body 20 are in the open state. At this time, the wiring material We is inserted into the respective insertion grooves 11 and 21 from the first external slit 61. The first connecting body 41 and the two second connecting bodies 42 expand the width of the second external slit 62 in the open state to expose the wall surface (each inner wall surface) of the communication path 1b from the second external slit 62. Then, in this open state, the wiring material We is inserted through the second external slit 62. That is, in this grommet 1, when the main body 10, the movable body 20, the first connecting body 41, and the second connecting body 42 are in the open state, one of the first external slits 61 and the second external slit 62 is connected to the other side. While assembling the cable material We, the other cable material We can be assembled from the other first external slit 61 and second external slit 62.

In this grommet 1, a first external slit 61 for each movable body 20 is provided between the main body 10 and the movable body 20, and a second external slit is provided between the first connecting body 41 and the second connecting body 42. 62 are provided. In this grommet 1, from the respective positional relationships of the main body 10, the movable body 20, the first connecting body 41, the second connecting body 42, and the hinge 50, the main body 10, the movable body 20, the first connecting body 41, and the When the two connecting bodies 42 are in a closed state, the two first external slits 61 and the second external slits 62 form one slit with one end of each connected at one point. Here, the two first external slits 61 and the second external slits 62 form one three-pronged (Y-shaped) slit. Therefore, in this grommet 1, when the main body 10, the movable body 20, the first connecting body 41, and the second connecting body 42 are in the open state, the second external slit 62 is wider than the first external slit 61. The width of can be greatly increased. Therefore, in this grommet 1, when assembling the wiring material We, the wiring material We is first inserted through the wide second external slit 62, and then this wiring material We is inserted through the first external slit 61. Therefore, the work of assembling the wiring material We can be improved.

Here, the hinge 50 is formed to open the main body 10, the movable body 20, the first connecting body 41, and the second connecting body 42 in an unloaded state. Thereby, in this grommet 1, when assembling the wiring material We, there is no need to widen the width of the two first external slits 61 and the second external slit 62 from the closed state to the open state. This grommet 1 does not require a jig or the like for keeping the two first external slits 61 and the second external slits 62 open. Therefore, this grommet 1 can also improve the work of assembling the wiring material We in this respect.

This grommet 1 has a reference wiring material We0 having a reference diameter as its maximum diameter and protects the wiring material We having a diameter equal to or less than the reference diameter (FIG. 9). Therefore, the inner circumferential surface of the insertion passage 1a has a close contact surface that is brought into close contact with the outer circumferential surface of the reference wiring material We0 over one circumference. That is, the inner circumferential surfaces 11b and 21b of the respective insertion grooves 11 and 21 have contact surfaces 11c and 21c that are brought into close contact with the outer circumferential surface of the reference wiring material We0 over one circumference when in the closed state. (Figures 9 and 10).

Furthermore, this grommet 1 is made to protrude from the inner peripheral surfaces 11b, 21b of the respective insertion grooves 11, 21, and in the closed state, the respective ends 71a, 71b around the axis of the wiring material We are brought into contact with each other. An internal slit 63 is formed between the end portions 71a and 71b, and a lip 70 is provided that is brought into close contact with the outer peripheral surface of the wiring material We over one circumference (FIGS. 4 to 8). This lip 70 is provided for each insertion passage 1a (that is, for each combination of one insertion groove 11 and the other insertion groove 21). The lip 70 shown here becomes a cantilevered cylinder with the wiring axis direction as the cylinder axis direction in the closed state, and is brought into close contact with the outer peripheral surface of the wiring material We over one circumference. This lip 70 expands the width of the internal slit 63 in the open state to expose the internal wall surface 72 from the internal slit 63, and allows the wiring material We to be inserted through the internal slit 63 in the open state (Figs. 7 and Figure 8).

This lip 70 becomes a truncated conical cylinder whose fixed end side becomes the lower base 73a in a closed state without the wiring material We inserted (FIGS. 4, 10, and 11). The lip 70 shown here projects from the inner circumferential surfaces 11b, 21b of the respective insertion grooves 11, 21 toward the protruding body 30, with the lower base 73a disposed on the connecting body 1B side and the lip 70 disposed on the protruding body 30 side. The upper base 73b of the free end is arranged at (FIG. 4, FIG. 10 and FIG. 11). In addition, when the lip 70 is in the closed state with the wiring material We inserted, the lip 70 is formed between the lower base 73a and the upper base 73b according to the diameter of the wiring material We. It becomes a cylindrical body having an enlarged diameter portion 74 that is expanded in We (FIGS. 12 and 13). The lip 70 shown in FIG. 12 represents a state in which the reference wiring material We0 is assembled. Moreover, the lip 70 shown in FIG. 13 represents a state in which the wiring material We having a thickness equal to or less than the diameter of the reference wiring material We0 is assembled.

This lip 70 becomes a truncated cone-shaped cylinder that is eccentric toward the internal slit 63 as it goes from the lower base 73a toward the upper base 73b when in the closed state without a wiring member. When the lip 70 is in the closed state with the wiring material present, the diameter of the lip 70 is expanded according to the diameter of the wiring material We without changing the positions of the respective ends 71a and 71b on the internal slit 63 side. For example, this lip 70 is made thin in its main portion to have flexibility in order to improve its adhesion to the outer circumferential surface of the wiring material We, but the thickness of the respective end portions 71a and 71b is By increasing the rigidity by making the wiring material thicker than the other parts, the diameter of the end portions 71a and 71b is expanded according to the diameter of the wiring material We without changing the positions of the ends 71a and 71b when in the closed state with the wiring material present.

This lip 70 is brought into close contact with the outer circumferential surface of the wiring material We having a thickness equal to or less than the diameter of the reference wiring material We0 over one round in a closed state, and only the upper base 73b is used for one round. The wiring material We with a diameter that can be brought into close contact over the whole area is the minimum diameter to be protected.

Here, the inner circumferential surfaces 11b and 21b of the respective insertion grooves 11 and 21 have accommodation recesses 11d and 21d in which the lips 70, which are stretched out on the reference wiring material We0 in the closed state, are accommodated (FIGS. 4 and 4). 8). The housing recesses 11d and 21d are portions of the inner circumferential surfaces 11b and 21b of the respective insertion grooves 11 and 21 that are recessed relative to the contact surfaces 11c and 21c. The lip 70 is made to protrude from the boundary between the contact surfaces 11c, 21c on the inner peripheral surfaces 11b, 21b of the respective insertion grooves 11, 21 and the accommodation recesses 11d, 21d. Thereby, when the grommet 1 is in the closed state with the reference wiring material We0 inserted, the lip 70 can escape into the accommodation recesses 11d and 21d, so that the reference wiring material We0 can be attached to the contact surfaces 11c and 21c. The contact surfaces 11c and 21c can be brought into close contact with the outer circumferential surface of the reference wiring material We0 over one circumference without lifting from the surface. Therefore, this grommet 1 can improve the liquid-proof property between the lip 70 and the wiring material We.

This grommet 1 is made of a flexible synthetic resin material such as synthetic rubber, and includes a grommet main body 1A (main body 10, movable body 20, protruding body 30) and a connecting body 1B (first connecting body 41, second connecting body 42), the hinge 50, and the lip 70 are molded as one integral part.

As shown above, the grommet 1 of the present embodiment can protect the wiring material We having a thickness between the reference diameter of the reference wiring material We0 and the above-mentioned minimum diameter by the lip 70 described above. , and the liquid resistance between the wiring material We and the insertion path 1a having a thickness between that range can be improved. Therefore, this grommet 1 does not need to be prepared as a special item for each wiring material with a different diameter, and if the wiring material We has a diameter within this range, it can be used to protect the wiring material and prevent the insertion path 1a. One product can improve liquid properties. Therefore, the grommet 1 of this embodiment can be used in common with wiring materials We of different diameter sizes, and the cost can be reduced. Further, in the grommet 1 of this embodiment, the wiring materials We of different diameter sizes can be assembled for each insertion passage 1a, so that the cost can be reduced in this respect as well.

1 Grommet 1a Insertion passage 10 Main body 11, 21 Insertion groove 11a, 21a Insertion port 11b, 21b Inner peripheral surface 11c, 21c Close contact surface 11d, 21d Accommodating recess 12, 22 First external slit periphery (end)
20 Movable body 50 Hinge 61 First external slit (external slit)
63 Internal slit 70 Lip 71a, 71b End portion 72 Inner wall surface 73a Lower bottom 73b Upper bottom 74 Expanded diameter portion We Routing material We0 Standard routing material

Claims (4)

The insertion passage through which the straight part of the wiring material is inserted has one insertion groove divided into two in the direction of the wiring axis of the straight part, and the opening of the one insertion groove is connected to the insertion opening of the wiring material. A subject who
a movable body having a second insertion groove divided into two in the insertion passage, and an opening of the other insertion groove serving as an insertion port for the wiring material;
a hinge that connects the main body and the movable body and relatively rotates the main body and the movable body between an open state and a closed state around an axis of a rotation axis extending in the direction of the wiring axis;
The wiring material is made to protrude from the inner circumferential surface of each of the insertion grooves, and in the closed state, the respective ends around the axis of the wiring material are brought into contact with each other to form an internal slit between the ends. a lip that forms a cantilevered cylindrical body with the cable axis direction as the cylindrical axis direction and tightly contacts the outer peripheral surface of the wiring material over one circumference;
has
The main body and the movable body form an external slit between the respective ends of the wiring material around the axis thereof in contact with each other in the closed state; The insertion groove is aligned with the insertion opening of the other insertion groove to form the insertion passage, and the width of the external slit is expanded in the open state, and the insertion of the respective insertion groove from the external slit is performed. expose your mouth,
The inner circumferential surface of the insertion passage has a contact surface that is brought into close contact with the outer circumferential surface of a reference wiring material having a reference diameter over one circumference,
The lip is a truncated conical cylinder in which the fixed end side becomes the lower base in the closed state without the wiring material, and the lip has a truncated conical shape with the fixed end side being the lower base, and the lip extends between the lower base and the upper base in the closed state with the wiring material. The wiring material becomes a cylindrical body having an enlarged diameter portion that is pushed out according to the diameter of the wiring material, and in the open state, the width of the internal slit is expanded to expose the inner wall surface from the internal slit. A grommet that is characterized by the ability to 2. The grommet according to claim 1, wherein the inner circumferential surface of each of the insertion grooves has an accommodation recess in which the lip that is pushed apart by the reference wiring material in the closed state is accommodated. When the lip is in the closed state without a wiring material, the lip becomes a truncated conical cylinder that is eccentric toward the internal slit as it goes from the lower bottom toward the upper bottom, and when the lip is in the closed state without a wiring material, The grommet according to claim 1 or 2, wherein when the grommet is in the closed state, the diameter of each of the ends on the side of the internal slit is expanded according to the diameter of the wiring material without changing the position. The main body has one of the insertion grooves at two locations with the respective directions of the wiring axis aligned,
The movable body and the lip are provided for each insertion path,
The grommet according to claim 1 or 2, wherein the external slit is provided for each movable body.

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