JP2005302478A - Grommet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grommet capable workability of mounting. <P>SOLUTION: The grommet 10 closes a penetrating opening 22 of a vehicle body frame 20 by allowing a pipe 32 or a wire penetrating the vehicle body frame 20 to penetrate an insertion hole 12c. The grommet 10 is formed of a rigid synthetic resin. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a grommet that fits and closes a through-hole through which a pipe or a wiring penetrates a body frame of an automobile.

  Conventionally, when it is desired to pass the pipe 32 through the vehicle body frame 20, as shown in FIG. 4, the through hole 22 of the pipe 32 is formed in the vehicle body frame 20 to pass through the pipe 32. Then, in order to close the opening of the through hole 22 generated after the pipe 32 passes through the through hole 22, the pipe 32 is inserted into the insertion hole 12 c formed in the iron plate grommet 10, and the bottom surface of the grommet 10 (the vehicle body frame 20). The peripheral edge of the surface on the side in contact with the surface was adhered with a butyl agent 12a to close the opening.

  In addition, since the grommet demonstrated above is more common than before, a prior art document is not described intentionally.

Since conventional grommets are made of iron plates, they are heavy and burdensome for workers who perform installation work. Further, the grommet was coated with a butyl agent and adhered to the vehicle body frame, so that it was troublesome for the worker who performed the installation work.
The present invention has been made in view of such a point, and an object of the present invention is to provide a grommet capable of improving the workability of mounting.

  As a means for solving the above-mentioned problem, the grommet according to claim 1 is a grommet that closes the through hole of the body frame by penetrating the pipe or wiring penetrating the body frame to the insertion hole. Since it is molded from a certain synthetic resin (for example, polypropylene), the weight is light and the workability of mounting can be improved.

  In the grommet according to claim 2, a plate-shaped closing body and a cylindrical fitting body depending on the lower surface of the closing body are integrally formed, and the side surface of the fitting body has a diameter corresponding to the diameter of the through hole. And a plurality of (for example, six) locking claws that are movable with respect to the fitting body by an elastic action. Therefore, as shown in FIG. 3, the fitting body is fitted into the through hole while the grommet is passed through the pipe from above the through hole. Then, since the locking claw of the grommet protrudes with respect to the hole diameter of the through hole, the protruding curved surface is pressed and pushed toward the center by elastic deformation by the inner peripheral surface of the through hole. When the fitting body is fitted into the through hole until the lower surface of the closing body contacts the upper surface of the vehicle body frame, the protruding curved surface of the locking claw of the grommet is not pressed by the inner peripheral surface of the through hole, The claw returns to the overhanging state before fitting due to elastic deformation. When the fitting body of the grommet is fitted into the through hole of the vehicle body frame in this way, the vehicle body frame is sandwiched between the grommet closing body and the engaging claw of the fitting body, and the grommet is easily engaged with the vehicle body frame. I can't come off. For this reason, a grommet can be simply attached and fixed to the through-hole of a vehicle body frame.

  Further, the grommet according to claim 3 is provided with a lip-shaped seal member 16a formed of a flexible synthetic resin (for example, elastomer) on the lower surface of the peripheral portion of the closing body. The adhesion between the body frames is increased, and the waterproofness and dustproofness from both directions are enhanced.

  The grommet according to claim 4 is provided with a cylindrical seal member 16b formed of a flexible synthetic resin (for example, elastomer) around the insertion hole of the obturator. The adhesion between the grommet and the grommet is increased, and the waterproof and dustproof properties are improved.

  In the grommet according to claim 5, the inner peripheral surface of the cylindrical seal member 16b is formed in a tapered shape in either the upper or lower direction. Therefore, for example, if it is formed in an upward taper shape (a taper shape in which the lower side is wider than the upper side), it is easy to insert the pipe.

Embodiments of the present invention will be described with reference to the drawings. Members having the same functions as those of the conventional example are denoted by the same reference numerals and description thereof is omitted. FIG. 1 is a schematic perspective view of a vehicle 1 according to the present invention. A rear seat 42 is provided on the seat frame 20 a of the vehicle 1. A fuel tank 30 is provided in the cavity 24 formed by the seat frame 20a and the bottom frame 20b.
The fuel stored in the fuel tank 30 is supplied 40 to the engine via a pipe 32 by a fuel pump 34 built in the fuel tank 30. In addition, since the fuel tank 30 is provided in the rear part of the vehicle 1, while the engine 40 is provided in the front part of the vehicle 1, the piping 32 reaches the engine 40 through the seat frame 20a. .

FIG. 2 is a perspective view for explaining the grommet 10 of the present invention, and shows a state before being attached to the seat frame 20a (before being fitted). The grommet 10 is formed by integral molding of an oval plate-like closing body 12 and a cylindrical fitting body 14 depending on the lower surface of the closing body 12 (the surface in contact with the seat frame 20a). Further, the closing body 12 is provided with an insertion hole 12c through which the pipe 32 is inserted, and a cylindrical seal member 16b (not shown in FIG. 2) is provided around the insertion hole 12c. Further, the inner diameter of the seal member 16b is made slightly smaller than the outer shape of the pipe 32 to improve the sealing performance when the pipe 32 is inserted. Further, the inner peripheral surface of the seal member 16b is, for example, formed in an upward taper shape (not shown in FIG. 2, but a taper shape in which the lower side is wider than the upper side), and the shape into which the pipe 32 can be easily inserted. It is said.
Further, an inclined portion 12b inclined downward is provided on the peripheral edge of the closing body 12, and a C-shaped seal member 16a, that is, a lip-shaped seal member 16a is provided on the lower surface of the inclined portion 12b. It is. And when this seal member 16a spreads in a letter C shape, it has a high sealing performance due to the sucker action.

  A plurality of (for example, six) locking claws 14 b are provided on the side surface of the fitting body 14. The locking claw 14b is formed by cutting out the side surface in an inverted U shape, and protruding from the hole diameter of the through hole 22 so as to protrude from the lower end portion of the fitting body 14 in an outwardly curved state. It is. And since the said latching claw 14b is formed with the synthetic resin mentioned later, it has the flexibility which can be moved by the elastic action with respect to the said fitting body 14, ie, is elastically deformed. Further, the distance (length L) from the upper surface to the lower surface of the closing body 12 generated by the overhanging of the locking claws 14b coincides with the height (height H) of the through hole 22. Further, the closing body 12 and the fitting body 14 are integrally formed of a rigid synthetic resin such as polypropylene (PP), and the sealing members 16a and 16b are formed of a flexible synthetic resin such as an elastomer resin. Has been.

FIG. 3 is a cross-sectional view for explaining a use state of the grommet 10 of the present invention, FIG. 3 (A) is before fitting, FIG. 3 (B) is being fitted, and FIG. 3 (C) is after fitting. Indicates the state.
As shown in FIG. 3A, the fitting body 14 is fitted into the through hole 22 while the grommet 10 is passed through the pipe 32 from above the through hole 22. Then, as shown in FIG. 3B, the locking claw 14 b of the grommet 10 protrudes with respect to the hole diameter of the through hole 22, so that the protruding curved surface is elastically deformed by the inner peripheral surface of the through hole 22 in the center direction. It is pushed and pushed into.

  As shown in FIG. 3C, when the fitting body 14 is fitted into the through hole 22 until the lower surface of the closing body 12 comes into contact with the upper surface of the vehicle body frame 20, the protruding curve of the locking claw 14b of the grommet 10 is obtained. The surface is no longer pressed by the inner peripheral surface of the through hole 22, and the locking claw 14b returns to the overhanging state before fitting by elastic deformation. Thus, when the fitting body 14 of the grommet 10 is fitted into the through hole 22 of the vehicle body frame 20, the vehicle body frame 20 is sandwiched between the closing body 12 of the grommet 10 and the locking claws 14 b of the fitting body 14. Is easily engaged with the body frame 20 and cannot be removed. In this fitted state, the seal member 16a is pressed by the upper surface of the seat frame 20a (the surface on the side where the fitting body 14 is inserted into the seat frame 20a) and spreads in a letter C shape to suck the upper surface of the seat frame 20a. Since it adheres more closely, it will prevent leakage from that location.

  In addition, the fitting body 14 is set to a size that fits easily into the through hole 22, and each of the locking claws 14 b is independent and easy to bend. The united body 14 can be inserted with a light force. Further, since each locking claw 14b is also made of a synthetic resin having rigidity, when fitted and engaged as described above, a feeling of moderation is obtained and a sufficient holding force of the grommet 10 with respect to the seat frame 20a is ensured. Moreover, since each said sealing member 16a, 16b is flexible, its adhesiveness is good. Further, since the seal member 16a has a lip shape, it has high waterproof and dustproof properties from both directions (both directions of the upper surface and the lower surface of the seat frame 20a).

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents. For example, in the present embodiment, the example in which the six locking claws 14b are provided on the side surface of the fitting body 14 has been described. However, the present invention is not limited to this, and may be four or eight.
In the embodiment of the present invention, the example in which the block 12 is elliptical has been described. However, the present invention is not limited to this. For example, the block 12 may be circular or polygonal.
In the embodiment of the present invention, the configuration applied to the pipe 32 supplied from the fuel tank 30 to the engine 40 has been described as an example. However, the present invention is not limited to this, and the remaining fuel level in the fuel tank 30 is detected. It may be applied to a signal line (not shown) of the fuel level sensor.

1 is a schematic perspective view of a vehicle 1 according to the present invention. It is a perspective view explaining the grommet 10 of this invention. It is sectional drawing explaining the use condition of the grommet 10 of this invention, (A) is the state before fitting, (B) is the state during fitting, (C) shows the state after fitting. . It is a perspective view explaining the conventional grommet 10. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Grommet 12 Blocking body 12c Insertion hole 14 Fitting body 14b Locking claw 16a, 16b Seal member 20 Body frame 22 Through-hole 32 Piping

Claims (5)

A grommet that closes the through hole of the vehicle body frame by penetrating a pipe or a wire penetrating the vehicle body frame into the insertion hole,
Grommet molded from rigid synthetic resin. In the grommet, a plate-shaped closing body and a cylindrical fitting body depending on the lower surface of the closing body are integrally formed,
2. The grommet according to claim 1, further comprising a plurality of locking claws protruding on a side surface of the fitting body with respect to a diameter of the through hole and movable with respect to the fitting body by an elastic action.   The grommet according to any one of claims 1 to 2, further comprising a lip-shaped sealing member formed of a flexible synthetic resin on a lower surface of a peripheral edge portion of the closing body.   The grommet according to any one of claims 1 to 3, further comprising a cylindrical sealing member formed of a flexible synthetic resin around the insertion hole of the closing body. The grommet according to claim 4, wherein an inner peripheral surface of the cylindrical seal member is formed in a taper shape in either the upper or lower direction.

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