JP2008075785A - Pipe supporting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved pipe supporting tool having desired vibration absorbing performance without increasing its manufacturing cost. <P>SOLUTION: The pipe supporting tool 1 is formed by connecting a mounted body joint portion 2 to be joined to a mounted body F such as a vehicle body to pipe holding portions 3a, 3b for holding pipes 4a, 4b in which a fluid flows. Between the mounted body joint portion and each of the pipe holding portions, or between the plurality of pipe holding portions, flexible structures are provided which are each formed of a single material integrally with the mounted body joint portion and the pipe holding portions. Particularly, it is preferable that the flexible structures are thin portions 9a, 9b extending to the axial directions of the pipes to be held. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe support, and more particularly, to a pipe support for fixing an important part of a pipe through which a fuel fluid, a brake fluid, or the like flows to an under floor of an automobile or a wall of an engine room.

  When pipes made of metal that flows fuel from the fuel tank to the engine are placed under the floor of an automobile or in the wall of an engine room, a pipe support made of synthetic resin is used to fix the main points of the pipe to the vehicle body. (See Patent Document 1).

In this case, since the pipe vibrates due to the flow of the fuel liquid accompanied by pressure pulsation, it is necessary to take measures to make it difficult to transmit the vibration to the vehicle body. Document 1 discloses that a main body portion of a support that is coupled to a stud bolt fixed to a body to be attached such as a vehicle body is formed of a hard material, and a portion that is in direct contact with a pipe is formed of a soft material. .
JP 2004-257558 A

  Since this conventional structure is a form in which a pipe is held by a high-rigidity main body part through a low-rigid lining, it is necessary to use a plurality of materials or a combination of a plurality of parts. Reduction is difficult. Also, to give sufficient vibration absorption characteristics (particularly vibration absorption performance in a relatively low frequency band) to the lining, the thickness of the lining must be increased, and the entire pipe support must be enlarged. I don't get it.

  The present invention has been devised to eliminate such disadvantages of the prior art, and its main purpose has been improved so as to obtain a desired vibration absorbing performance without increasing the manufacturing cost. It is to provide a pipe support.

  In order to achieve such an object, the present invention provides an attached body coupling portion (vehicle body coupling portion 2) coupled to an attached body (F) such as a floor plate of a vehicle body, and pipes (4a and 4b) through which fluid flows. In the pipe support (1) formed by connecting the pipe holders (3a, 3b) for holding the pipe, the gap between the attachment body coupling portion and the pipe holder, or between the plurality of pipe holders. A flexible structure integrally formed with a single material is provided together with the attachment body coupling portion and the pipe holding portion (claim 1). In particular, the flexible structure may be a thin portion (9a, 9b) extending in the axial direction of the pipe to be held (claim 2).

  According to the present invention, since the pipe support can be configured with a single material and a single part, it is possible to eliminate the elements that increase the number of manufacturing steps and the manufacturing cost, and to suppress the desired vibration transmission. A great effect can be obtained in supplying a pipe support with high performance at low cost. In particular, if the connection is made at a thin portion, the volume of the connecting portion between the attachment body coupling portion and the pipe holding portion can be minimized and the support rigidity of the pipe can be lowered. The amount of vibration transmission can be reduced, which is effective in enhancing the vibration noise suppression effect.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIGS. 1 to 3, the pipe support 1 includes a vehicle body coupling portion 2 disposed substantially in the center and two portions on both sides sandwiching the vehicle body coupling portion 2 so as to be coupled to the vehicle body as an attachment body. Pipe holding portions 3a to 3d that are distributed and arranged one by one, and are integrally formed by injection molding of a single synthetic resin material. Note that the pipe 4a through which the fuel evaporative gas flows and the pipe 4b through which the fuel liquid flows are held by the two pipe holding units 3a and 3b located on the left side of the vehicle body coupling unit 2 toward the paper surface. The two pipe holders 3c and 3d located on the right side of the two hold the two pipes 4c and 4d through which the brake fluid flows.

  The vehicle body coupling portion 2 has a well-known structure, and as shown in FIG. 3, four free ends mesh with the threads of a stud bolt 5 that is suspended from a lower surface of a vehicle body floor plate F that is an attached body. A bullet nail 6 is provided. These elastic claws 6 bend outward when the vehicle body coupling portion 2 is pressed against the stud bolt 5 and escape from the screw thread. However, when a force is applied to pull out the vehicle body coupling portion 2 from the stud bolt 5, It bends in the direction of biting. In other words, it is easy to install but difficult to escape. The stud bolt insertion hole 7 of the vehicle body coupling portion 2 is a long hole along the axial direction of the pipe to be held, and the position between the stud bolt 4 and the pipes 4a to 4d in manufacturing or due to thermal deformation or the like. The error can be absorbed.

  Each of the pipe holding portions 3a to 3d has an appropriate axial direction dimension for holding the straight pipe portion of the pipes 4a to 4d to be attached, and the shape viewed from the axial direction is U-shaped, or C-shaped. And, at the open end (upper side in FIGS. 1 and 2) along the axial direction, it is inclined toward the center (the central axis of the held pipe) of each of the pipe holding portions 3a to 3d, similarly to a known pipe support. Extended bullet pieces 8a to 8d are provided. When the elastic pieces 8a to 8d push the pipes 4a to 4d into the pipe holding portions 3a to 3d, their free ends are bent toward the side walls of the pipe holding portions 3a to 3d and pass through the pipes 4a to 4d. When the pipes 4a to 4d are received in the pipe holding portions 3a to 3b, the pipes 4a to 4d are restored to their original shapes, and the pipes 4a to 4d are prevented from coming out. Moreover, the bottom surface of each pipe holding part 3a-3d is carrying out the arch shape, contact | abuts to the part more than the semicircle of the outer peripheral surface of pipe 4a-4d, and the pipe 4a received in each pipe holding part 3a-3d ~ 4d is not rattled.

  The two brake pipe pipe holding portions 3c and 3d arranged side by side on the right side of the vehicle body coupling portion 2 are substantially connected to the vehicle body coupling portion 2 in a rigid joint structure, and the brake pipe pipe holding portion is provided. No flexible structure is provided between the parts 3c and 3d and the vehicle body coupling part 2.

  On the other hand, the fuel liquid pipe holding portion 3b disposed on the left side of the vehicle body coupling portion 2 includes a thin portion 9b extending along a plane passing through the center of the pipe 4b attached to the pipe holding portion 3b. It is connected to the left side surface of the vehicle body coupling portion 2 via the via.

  Further, the evaporative gas pipe holding portion 3a is connected to the left side surface of the fuel liquid pipe holding portion 3b through the same thin portion 9a as described above.

  These thin portions 9a and 9b can be elastically deformed between the vehicle body coupling portion 2 and the fuel liquid pipe holding portion 3b and between the fuel liquid pipe holding portion 3b and the evaporative gas pipe holding portion 3a. Since the flexible structure is interposed, vibrations of the evaporative gas pipe 4a and the fuel liquid pipe 4b are suppressed from being transmitted to the vehicle body coupling portion 2 due to the bending of the thin portions 9a and 9b.

  The lower portions of the two pipe holding portions 3a and 3b located on the left side of the vehicle body coupling portion 2 are constituted by double walls of an inner peripheral wall 10 and an outer peripheral wall 11 that form an arch shape.

  In the above-described embodiment, the two pipe holding portions 3a and 3b are connected to the left side surface of the vehicle body coupling portion 2 through a thin portion 9, but as shown in FIG. 2, one pipe holding part 3 is connected to only one side surface via a thin part 9, or as shown in FIG. 5, both side parts of the vehicle body coupling part 2 are provided with a thin part 9 between them. The plurality of pipe holding portions 3 may be connected in a daisy chain via the.

  As described in detail above, the present invention has a structure in which the connecting portion between the vehicle body coupling portion 2 and the pipe holding portion 3 constituted by a single material / single part or the connecting portion between the plurality of pipe holding portions 3 is easily bent. Therefore, it is possible to avoid an increase in manufacturing steps and manufacturing costs due to the provision of the vibration absorbing function. In particular, the pipe holding part 3 is made of double walls 10 and 11, the pipe is brought into contact with the inner peripheral wall 10, and the outer peripheral wall 11 is connected to the vehicle body coupling part 2, thereby dispersing the stress due to the bending of the outer peripheral wall 11. Therefore, the support rigidity of the pipe can be further reduced.

It is a perspective view of the pipe holder by this invention. It is a front view of the pipe holder shown in FIG. It is principal part sectional drawing which shows a mode that the pipe holder shown in FIG. 1 was couple | bonded with the vehicle body. It is a front view which shows another embodiment of the pipe holder by this invention. It is a front view which shows another embodiment of the pipe holder by this invention.

Explanation of symbols

F body floor board (attachment)
1 Pipe support 2 Car body coupling part (attachment body coupling part)
3a, 3b Pipe holding part 4a, 4b Pipe 9a, 9b Thin part

Claims (2)

A pipe support formed by connecting an attachment body coupling portion coupled to an attachment body such as a vehicle body and a pipe holding portion for holding a pipe through which a fluid flows;
A flexible structure integrally formed with a single material together with the attached body coupling portion and the pipe holding portion between the attached body coupling portion and the pipe holding portion or between a plurality of pipe holding portions. A pipe support characterized by being provided.   The pipe support according to claim 1, wherein the flexible structure is a thin wall portion extending in an axial direction of the pipe to be held.

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