JP2000320734A - Pipe clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe clamp capable of making holding force and vibration shutting-off property compatible in higher dimension without increasing the number of components and having excellent mounting and dismounting properties. SOLUTION: This pipe clamp 1 provided with a pipe holding body 2 holding pipes and a bolt connection body 3 connected with a stud bolt 13 provided on a vehicle body to fix important parts of the pipes P1, P2 in which fluid flows at a predetermined position of the vehicle body is constituted in such a way that the pipe holding body and a vehicle body connection body are separated from each other and a vibration shutting-off part made of a soft material is formed by two-color molding in at least either of both of the pipe holding body and the vehicle body connection body in a connection part of both of them. Consequently, it is unnecessary to increase the number of parts because the vibration shutting-off part provided in the connection part of the pipe holding body and the vehicle body connection body is integrally formed in either of both members.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe clamp for fixing a pipe, at which a fluid such as a fuel fluid or a brake fluid flows, at a predetermined position on a vehicle body.

[0002]

2. Description of the Related Art When a pipe through which a fluid accompanied by pressure pulsation such as a fuel fluid or a brake fluid flows is piped under a floor of a vehicle body,
A pipe clamp is used to fix a key point of a pipe at a predetermined position on a vehicle body. It is preferable that the pipe clamp is one that can be easily attached, has a large holding force, and does not transmit sound or vibration to the vehicle body.

Incidentally, the material forming the pipe clamp is preferably a hard material having high rigidity in order to obtain a high holding force, and a soft material having a high flexibility in order to obtain a high vibration isolation property. It is desirable. Conventionally, in order to satisfy such contradictory characteristics, both a vehicle body coupling body coupled to a vehicle body and a pipe holding body that holds a pipe are formed of a hard material, and a vibration made of a soft material is interposed therebetween. A configuration in which a blocking member is interposed has generally been adopted.

[0004]

However, according to this conventional type, the vibration isolating member made of a soft material is formed as a separate member from the vehicle body coupling body and the pipe holder.
Parts management in the production line tends to be complicated. Also, although considerations are generally given to ease of installation work, detachability is not so important, so removing it during maintenance etc. will damage the vehicle body assembly and reuse it Often it was impossible.

[0005] The present invention has been devised to solve such problems of the prior art, and its main objects are as follows.
An object of the present invention is to provide a pipe clamp which can achieve both higher holding power and vibration isolation without increasing the number of parts, and which is excellent in detachability.

[0006]

In order to achieve the above object, according to the present invention, a pipe holder for holding a pipe in order to fix a point of a pipe P through which a fluid flows to a predetermined position of a vehicle body. A pipe clamp 1 including a bolt 2 and a bolt connector 3 connected to a stud bolt 13 provided on a vehicle body is provided with a pipe holder and a vehicle body connector which are separated from each other. At least one of the two portions at the connection portion with the above is formed with a vibration isolation portion (buffer projections 18a and 18b in the embodiment) made of a soft material by two-color molding.

[0007] According to this, the vibration isolating portion provided at the joint between the pipe holder and the vehicle body joint is formed integrally with one of the two members, so that the number of parts is not increased. I'm done.

[0008] In particular, coupling means (an axial groove 6, a non-return claw 7, an axial groove 6 in the embodiment) for applying a pressing force between the pipe holding body and the vehicle body coupling body at least at a predetermined position. If the ridge 19) is provided, the pipe clamp composed of two parts can be supplied to the production line in a form integrated into one part.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a pipe clamp according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the pipe clamp 1 comprises a pipe holder 2 and a bolt connector 3 which are formed separately from each other and which are connected to each other when used. Among these, the pipe holder 2 is, as shown in FIGS.
And two pipe receiving portions 5a and 5b distributed on both sides of the receiving portion 4 therebetween, and the whole is integrally formed by injection molding of a relatively hard synthetic resin material.

The bolt connector receiving portion 4 has a substantially cylindrical shape, and four axial grooves 6 are formed in the inner peripheral surface thereof at intervals of 90 degrees. Also, one of the bolted joint receiving portions 4 (FIG. 1)
A resilient piece 8 having a check claw 7 at its free end is formed at a point symmetrical position on the open end side (lower side in FIG. 1).

Each of the pipe receiving portions 5a and 5b is composed of two U-shaped grooves having widths different from each other on the right side and the left side, and the wide side (the right side in FIG. 1) 5a has an opening. Two pairs of resilient pieces 9 and 10 extending obliquely from the end and the side wall toward the center and the bottom of the groove, and a ridge 11 projecting from the inner surface of the bottom wall along the axis of the pipe P1 to be attached. And each is provided. When the pipe P1 having a relatively large diameter is pushed into the pipe receiving portion 5a on the wide side, the free ends of the resilient pieces 9 on the opening side are opened to allow passage of the pipe P1, and the pipe P1 is passed through the pipe receiving portion 5a. When P1 is received, it is restored and the free end of the pipe P1 is prevented from coming off. And the resilient piece 10 on the side wall is the pipe receiving portion 5a.
The pipe P1 received therein is resiliently urged toward the opening side to suppress the rattling of the pipe P1 in the pipe receiving portion 5a.

In the narrow side 5b, a pair of resilient pieces 12 each extending diagonally toward the center and the bottom of the groove are provided only at the opening end thereof. A relatively small-diameter pipe P2 is held in the receiving portion 5b.

On the other hand, as shown in FIGS. 5 to 7, the bolt assembly 3 is provided with a stud bolt 1 on an inner peripheral surface of a hole 14 for receiving a stud bolt 13 suspended from the lower surface of the vehicle body floor plate F.
A plurality of resilient pieces 15 whose free ends are engaged with the male screw 3
It has. When these resilient pieces 15 are pressed against the tips of the stud bolts 13, they flex outward and their free ends escape from the outer peripheral surface of the external thread of the stud bolt 13. It cuts into the valley. That is, the bolted body 3 is easily attached to the stud bolt 13 but difficult to remove.

Each of the free ends of the plurality of resilient pieces 15 forms a part of a female screw, and the bolted joint 3 serves as a nut that cooperates with the stud bolt 13 to screw together. . That is, the bolted joint 3 is provided with a wrench (not shown) on a hexagonal head 16 formed on the lower end side in FIG.
Can be detached from the stud bolt 13 once joined without damage.

The bolted joint 3 has a resilient piece 15 to be coupled to the stud bolt 13 and has a flexural modulus of 30,
For example, acetal resin (POM) of about 000 kg / cm ²
A portion 18 made of a soft material such as a vinyl chloride resin (PVC) having a hardness of about 50 is formed by a two-color molding method with respect to a main portion 17 made of a hard material such as.

Each of the soft material portions 18 has four 90-degree intervals so as to directly engage with the inner peripheral surface of each end of the bolt connector receiving portion 4 provided on the pipe holder 2 in the axial direction. In order to engage with the buffer projections 18a and 18b and the opening end face on the lower end side of the bolted joint receiving portion 4 provided on the pipe holder 2, a hexagonal head 1 is provided separately from these buffer projections 18a and 18b.
It comprises four retaining projections 18c formed at the end on the 6 side. An axial ridge 19 is provided on the outer peripheral surface of each of the four buffer projections 18a and 18b.

At the time of delivery to the production line, the bolt joint 3
The protrusions 19 protruding from the outer peripheral surfaces of the buffer protrusions 18a and 18b are aligned with the grooves 6 on the inner peripheral surface of the bolt coupling body receiving portion 4, and then the bolt coupling body 3 is inserted into the bolt coupling body receiving portion 4. 9 (see FIG. 8A), and the check pawl 7 is made to bite into the tip of the pair of retaining projections 18c at the line symmetric position (FIG. 9).
-A). As a result, at the vibration level during transportation,
3 can not be separated, so that the pipe holder 2 and the bolted joint 3 are formed as separate members, but both can be handled as a single part.

When the pipes P1 and P2 are engaged with the pipe receiving portions 5a and 5b of the type in which the two and the three are temporarily connected, and the bolted body 3 is pressed against the stud bolt 13, the inside of the bolt receiving hole 14 is formed. Each resilient piece 12 is elastically deformed and connected to the external thread of the stud bolt 13 (see FIG. 1).

Thereafter, when the bolt assembly 3 is twisted by about 45 degrees in the direction in which the screws are tightened, the curvature of the inner peripheral surface of the bolt assembly receiver 4 becomes larger than a perfect circle, so that the buffer projections 18a and 18b are provided. When the ridge 19 is removed from the axial groove 6, the ridge 19 comes into light contact with the inner peripheral surface of the bolted joint receiving portion 4 (see FIG. 8B). Thereby, the bolted joint 3
Since the pipe holder 2 is connected in a floating state in the radial direction of the stud bolt 13, the vibration of the pipe holder 2 is suppressed from being transmitted to the bolt connector 3. In this state, the retaining projection 18c of the bolted joint 3 comes into contact with the opening end face of the receiving portion 4, so that the bolted joint 3 screwed to the stud bolt 13 is formed.
Can not be detached from the pipe holder 2 (see FIG. 9-b).

When the bolt assembly 3 is loosened using a wrench, the slope between the tip of the retaining projection 18c and the check pawl 7 is a direction in which the elastic piece 8 is bent outward, so that it is relatively easy. Can be loosened.

Since the bolted joint 3 connected to the stud bolt 13 can be used in common, the shape of the parts connected to the vehicle body via the stud bolt is not limited to the pipe holder 2 of the above-described embodiment, but may be various forms. Can be widely supported.

[0023]

As described above, according to the present invention, a portion requiring a high holding force is formed of a hard material, and a portion made of a soft material can be interposed in a desired portion. It is not necessary to increase the number of processing steps and the number of parts to configure the pipe clamp provided. Moreover, the pipe holding body capable of holding a plurality of pipes is fixed to the vehicle body with a single bolted body, and the detachability between the pipes can be ensured. Therefore, regardless of the number of pipes that can be held, vibration isolation can be achieved. For the soft material in one place. That is, according to the present invention, it is possible to provide a pipe clamp capable of achieving both higher holding power and vibration isolation without increasing the number of parts and the number of manufacturing steps.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a pipe clamp according to the present invention.

FIG. 2 is a plan view of a pipe holder.

FIG. 3 is a front view of a pipe holder.

FIG. 4 is a bottom view of the pipe holder.

FIG. 5 is a plan view of a bolted assembly.

FIG. 6 is a front view of the bolted assembly.

FIG. 7 is a bottom view of the bolted assembly.

FIG. 8 is a bottom plan view showing a state of connection between the pipe holder and the bolted body.

FIG. 9 is a bottom view showing a state of connection between the pipe holder and the bolted body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe clamp 2 Pipe holding body 3 Bolt coupling body 6 Axial groove 7 Non-return claw 13 Stud bolt 18a / 18b Buffer projection 19 Protrusion P pipe

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H023 AA05 AB01 AC35 AC44 AD02 AD54 AE11 3J022 DA11 DA15 DA19 EC17 EC22 ED23 FA05 FB06 FB16 GA12 3J039 AA04 BB01 FA01 FA05 MA01

Claims (2)

[Claims] A pipe holder for holding a pipe and a bolt connector for connecting to a stud bolt provided on the vehicle body so as to fix a point of the pipe through which fluid flows to a predetermined position of the vehicle body. A pipe clamp, wherein the pipe holding body and the vehicle body coupling body are separated from each other, and at least one of both at a connecting portion between the pipe holding body and the vehicle body coupling body is made of a soft material. A pipe clamp characterized in that the vibration isolating portion is formed by two-color molding. 2. A coupling portion for applying a pressing force between the pipe holding member and the vehicle body coupling member at at least a predetermined position at a coupling portion between the two members.
Pipe clamp as described in