JP2001208244A - Holding/fixing structure of pipe by clamp body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding/fixing structure of a pipe by a clamp body easily and quickly performing the holding and fixing works for the pipe, sufficiently securing the holding force of the pipe even in a case of a thin-wall plate material, eliminating any trouble by dispensing with calking work and tools, and efficiently performing the holding and fixing work. SOLUTION: This structure is provided with a resin layer, at least, in the outer circumferential face of a clamp part of a pipe and holds and fixes the resin layer by the clamp body. The clamp body has mutually opposite holding walls, comprises a pair of two belt plates having a plurality of projections, at least, on its one internal circumferential face of the holding wall, and can be engaged with each other in their ends. The projections of the holding walls are pressurized so as to bite into the resin layer of the pipe by the mutual clamping in a superposing flat wall part of the clamp body by a clamp device so that the holding wall parts are elastically engaged together to hold and fix the pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a clamp body for a pipe having a relatively small diameter of about 20 m / m or less, which is provided as an oil supply / supply path for an automobile or various machines and devices. And a holding structure for the pipe.

[0002]

2. Description of the Related Art A relatively thin pipe having a pipe diameter of about 20 m / m or less, which is provided as an oil supply / supply path for automobiles or various machines and devices, has a coating layer on an outer surface. Although a resin-coated tube with a resin layer applied to the outer surface over almost the entire length by a tube or extrusion molding that is not used is used, as a holding and fixing structure with a conventional clamp body adopted as a fixing means for these pipes Is, for example, FIG.
As shown in the cross-section, an elastic body 11-2 such as rubber is externally fitted to the pipes P1 'and P2', and the above-mentioned clamp body 11 is formed by folding a single band-shaped plate material to form a holding wall 11-1. An elastic body 11-4 surrounding the elastic body 11-2 and a flat wall facing the elastic body 11-2 is fastened with a fastening bolt 11-3, or an elastic material 12-4 such as rubber is inserted into the outer peripheral surface as shown in FIG. The pipes P3 ', P4' to be fitted are tightly surrounded by a clamp body 12 having holding walls 12-1a, 12-1b formed by caulking a single strip of plate material, and tightening bolts 12-3 are provided on the mounting wall side. It is known that the clamp body 12 is formed by heating brazing to a band-shaped plate material 12-2 fastened by the above method.

[0003]

However, such a conventional structure for holding and fixing a pipe has the following drawbacks. That is, in the case of the holding and fixing structure shown in FIG. 8, the number of steps for bending the clamp body 11 is large, so that the pipe holding and fixing work cannot be speeded up, and the workability of the holding and fixing work is improved. For this purpose, it is necessary to make the thickness of the strip-shaped plate material constituting the clamp body as thin as possible, but there is a drawback that the use of a thin-walled plate material results in insufficient pipe holding force. Further, in the case of the holding and fixing structure shown in FIG. 9, it takes time to position the insertion position and the clamping position of the elastic material 12-4 such as rubber, and requires a press tool or a metal fitting for caulking the holding wall. The clamp body 12 must be heated and welded.
There was a drawback that the work of holding and fixing the piping required much labor and time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art. The clamp body is composed of two band-shaped plate members so that the clamp body can be easily assembled and the holding and fixing work can be performed easily and quickly. And it is possible to secure sufficient pipe holding force even with a thin plate material.
It is another object of the present invention to provide a holding and fixing structure of a pipe by a clamp body capable of efficiently performing a holding and fixing work by eliminating the need for a swaging operation and a swaging tool.

[0005]

A pipe holding and fixing structure according to the present invention comprises a resin layer on at least an outer peripheral surface of a clamp portion of a pipe, and holds and fixes the resin layer portion by a clamp body. The clamp body has a holding wall facing each other, and two strip-shaped plate members having a plurality of protrusions on at least one inner peripheral surface side of the holding wall. One of the band-shaped plate members has a locking hole at an end thereof, and the other band-shaped plate member has a clamp body having a locking projection fitted into the locking hole at the end portion thereof, and is overlapped with each other. With the mutual fastening by the fasteners on the flat wall portion, the projections of the holding wall are bitely pressed against the outer peripheral surface of the resin tubular piece of the pipe, and the holding wall portion is elastically engaged. It is characterized by having comprised.

The piping in the present invention is intended for a tube having no resin layer on the outer surface or a resin-coated tube having a resin layer formed on the outer surface over substantially the entire length by extrusion molding, of which a resin layer is not formed on the outer surface. When clamping the pipe, a resin cylinder is fixed to the outer peripheral surface of the clamp portion of the pipe, and the resin cylinder is held and fixed by the clamp body. In the case of a resin-coated tube having a resin layer on the outer surface, the resin cylinder is unnecessary.

[0007] Since the present invention has such a configuration, when clamping the pipe, the locking projection of the other band-shaped plate is inserted into the locking hole of one band-shaped plate of a pair of clamp bodies constituted by two band-shaped plates. By inserting and pushing the pipe into the holding wall and tightening the clamp body with the fastening tool, the resin cylinder in the case of a tube without a resin layer on the outer surface, and the resin clad tube with the resin layer on the outer surface Since the resin coating layer is attached and engaged by the holding wall portion having a plurality of projections on the inner peripheral surface side, the bite-like shape of the cylindrical piece at the projection portion due to the fastening is formed. A large pipe holding force is obtained by the engagement pressure, so that even under the vibrating state, mutual displacement and rotation of the fixed portion can be reliably prevented for a long period of time.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view showing an embodiment of a holding and fixing structure for a pipe having no resin layer on the outer surface, and FIG. 2 is a resin coating having a resin layer over the entire outer surface by extrusion molding or the like. FIG. 3 is a plan view showing an embodiment of a tube holding and fixing structure, FIG. 3 is a longitudinal sectional view taken along the line yy in FIG. 1, and FIGS. 4 to 7 are other examples of a tube holding and fixing structure having no resin layer on the outer surface. FIG. 4 is a diagram corresponding to FIG. 3, showing an example.

1, 2 and 3, reference numeral 1 denotes a pair of clamps constituted by two strips 1-1 and 1-2, one of the strips 1-1 having one end thereof. Locking hole 1 is formed in a bent piece portion 1-1a formed by bending the
-1b, and the other end is formed with a stopper piece 1-1c for positioning the other band-shaped plate 1-2, and the other band-shaped plate 1-2 has a concave cross-section formed by press working. It has a holding wall 1-2a, and has a plurality of protrusions 1-2b protruding toward the central axis of the pipes P1 and P2 on the inner peripheral surface side of the holding wall 1-2a. It is formed at the same time when the clamp body is formed, and has a locking projection 1-2c that can be fitted into a locking hole 1-1b provided at an end of the band-shaped plate material 1-1 on the other side. . And 2
Each of the strip-shaped plate members 1-1 and 1-2 is formed by assembling a fastening bolt 1-3 to through holes 1-1d and 1-2d formed in flat wall portions. P1-1 and P2-1 are heat-shrinkable resin cylinders each having an adhesive property on the inner peripheral surface, and are attached to the clamped portions of the respective pipes P1 and P2 and fixed by heating at a low temperature. And lay it down. In the case of the resin-coated tubes P3 and P4 having the resin layers P3-1 and P4-1 on the outer surface shown in FIG. 2, the resin cylinders P1-1 and P2-
1 is unnecessary.

That is, in the holding and fixing structure of the pipes P1 and P2, the locking projections 1-2c of the other band-shaped plate 1-2 are fitted into the locking holes 1-1b of the band-shaped plate 1-1. In this state, the pipes P1 and P2 are pushed between the strip-shaped plate member 1-1 and the holding wall 1-2a, and the resin pipes P1-1 and P2 of the pipes P1 and P2.
-1 is engaged with the holding wall 1-2a of the clamp body 1 in a resilient manner along with the mutual tightening by the tightening bolts 1-3, so that the protrusion 1-2b is made of a resin cylinder P1-1. , P
2-1 is pressed against the outer peripheral surface in a biting manner. In addition, the resin layers P3-1 and P4-1 are formed on the outer surface shown in FIG.
In the case of the resin-coated tubes P3 and P4 having the above, the holding walls 1-2a of the clamp body 1 are resiliently pressed to the outer resin layers P3-1 and P4-1 by the fastening bolts 1-3. And the protrusions 1-2b are connected to the resin layers P3-1 and P4.
-1 so as to bite into the outer peripheral surface.

Next, the holding and fixing structure of the pipe shown in FIG.
This is an example of a structure in which three pipes P1 and P2 are arranged on the lower side and held and fixed contrary to the holding and fixing structure shown in FIGS. 1 and 2, and the clamp body 2 is a band-shaped plate material located on the lower side A holding wall 2-1a having a concave cross section formed by pressing toward 2-1.
And three pipes P are provided on the inner peripheral surface side of the holding wall 2-1a.
1, a plurality of protrusions 2 protruding toward the central axis of P2
A holding hole 2-1c at the end of the holding wall 2-1a, into which a locking protrusion 2-2a at the end of the other band-shaped plate member 2-2 can be fitted, Further, a stopper piece 2-1d for positioning the other band-shaped plate member 2-2 is formed at the other end of the band-shaped plate member 2-1. Then, a through hole 2-1 formed in a flat wall portion of the two band-shaped plate members 2-1 and 2-2 which are overlapped with each other.
e, a fastening bolt 2-3 is attached to the portion 2-2c. Similarly to the above, the three pipes P1 and P2 have heat-shrinkable resin cylinders P1-1 and P1-1 having adhesive properties on the inner peripheral surface.
2-1 is attached to the clamped portion of each pipe and fixedly laid by heating at a low temperature. That is, the pipe fixing structure of the three pipes P1 and P2 has the locking holes 2-1c on the band-shaped plate member 2-1 side and the locking protrusions 2- on the partner band-shaped plate member 2-2 side.
With the 2a fitted, the three pipes P1 and P2 are pushed between the strip-shaped plate member 2-2 and the holding wall 2-1a, and each pipe P
1. The holding wall 2-1a of the clamp body 2 is fastened to the outer peripheral portions of the resin cylinders P1-1 and P2-1 of P2 by tightening bolts 2-.
3, the projections 2-1b are elastically engaged with each other to bite the outer peripheral surfaces of the resin cylinders P1-1 and P2-1.

The holding and fixing structure for pipes shown in FIG. 5 is an example of a structure in which three pipes P1 and P2 are held and fixed at intervals on the same upper side as in FIG. One of the band-shaped plates 3-1 has a locking hole 3-1a at one end thereof, and the other band-shaped plate 3-2 is formed at the other end thereof. Stopper piece 3 for positioning
1b, and the other band-shaped plate member 3-2 is formed by pressing into an arc-shaped holding wall 3-3 having an upper surface formed in an arc shape so as to follow the outer peripheral surfaces of the three pipes P1 and P2. 2
and a plurality of projections 3-2b protruding toward the central axis of the three pipes P1 and P2 on the inner peripheral surface side of the holding wall 3-2a as described above. It has a hook-shaped locking projection 3-2c that can be fitted into a locking hole 3-1a provided at the end of the other band-shaped plate 3-1. Then, a fastening bolt 3-3 is attached to the through holes 3-1c and 3-2d formed in the flat walls of the two band-shaped plate members 3-1 and 3-2 which are superposed. As described above, the three pipes P1 and P2 have a heat-shrinkable resin cylinder P1 having an adhesive property on the inner peripheral surface.
-1, P2-1 are adhered to the clamped portions of the respective pipes, fixed by heating at a low temperature, and laid. That is,
The holding and fixing structure of the pipe shown in FIG.
Three pipes P1 and P2 in a state where the locking projection 3-2c of the band-shaped plate 3-2 on the other side is engaged with the locking hole 3-1a on the side.
Are pushed in at an interval between the band-shaped plate member 3-1 and the holding wall 3-2a, and the resin cylinders P1-1, P1 of the respective pipes P1, P2.
The retaining wall 3-2a of the clamp body 3 is elastically engaged with the outer peripheral portion of the clamp body 3 by the fastening bolts 3-3 so as to resiliently engage the projections 3-2b with the resin cylinders of the respective pipes. Body P
1-1 and P2-1 are pressed into the outer peripheral surface in a biting manner.

The holding and fixing structure for pipes shown in FIG. 6 is an example of a structure in which four pipes P1 and P2 are arranged and held two by two at the top and bottom. −
1 and 4-2, each of which has four pipes P1 and P2 on the lower band-shaped plate member 4-1 and the upper band-shaped plate member 4-2, each of which can be accommodated in two stages, two upper and lower layers. The holding walls 4-1 a and 4-2 a having a concave cross section are provided.
A plurality of projections 4-1b, 4-2 protruding toward the central axis of each pipe P1, P2 on the inner peripheral side of -1a, 4-2a.
b is formed at the end of the lower band-shaped plate member 4-1 on the holding wall 4-1a side at the end of the partner band-shaped plate member 4-2 on the holding wall 4-2a side. A locking hole 4-1c into which the locking protruding piece 4-2c is fitted is formed, and a stopper piece 4 for positioning the other strip 4-2 is provided at the other end of the strip 4-1. 1d. Then, a through hole 4-1 formed in the flat wall portion of the two band-shaped plate members 4-1 and 4-2 stacked one upon another.
e, a fastening bolt 4-3 is attached to the 4-2d portion. As described above, the four pipes P1 and P2 have heat-shrinkable resin cylinders P1-1 and P1-1 having adhesive properties on the inner peripheral surface.
2-1 is adhered to the clamped portion of each pipe and fixedly laid by heating at a low temperature. That is, the pipe fixing structure of the four pipes P1 and P2 is the lower band-shaped plate member 4-1.
The four pipes P1 and P2 are overlapped two by two in the upper and lower portions in a state in which the locking projections 4-2c of the upper band-shaped plate member 4-2 are engaged with the locking holes 4-1c on the side, respectively. Each pipe P1, P is stored in the holding walls 4-1a, 4-2a of the plate members 4-1 and 4-2.
The holding walls 4-1a and 4-2a of the clamp body 4 are elastically engaged with the outer peripheral portions of the resin-made cylindrical bodies P1-1 and P2-1 by the fastening bolts 4-3. The projections 4-1b and 4-2b are combined to correspond to the corresponding resin cylinder P1.
-1, P2-1 are pressed into the outer peripheral surface in a biting manner.

The holding and fixing structure for pipes shown in FIG. 7 is an example of a structure in which two pipes P1 and P2 are vertically stacked and held and fixed, and the clamp body 5 has a strip-shaped plate member 5 located on the lower side.
Holding wall 5 formed at approximately right angle by pressing toward 1
-1a is provided, and a locking hole 5-1b is formed at the end of the holding wall 5-1a so as to engage with the other band-shaped plate member 5-2. Is the other strip 5
A stopper piece 5-1c for positioning of -2 is formed. On the other hand, on the upper band-shaped plate member 5-2, the holding wall 5 is provided.
1a, a vertically concave holding wall 5-2a is provided by pressing at a position opposed to -1a, and the central axis of two pipes P1, P2 is provided on the inner peripheral surface side of the holding wall 5-2a. A plurality of projections 5-2b projecting toward the holding wall 5-2a.
Are provided with hook-shaped locking projections 5-2c that can be fitted into locking holes 5-1b drilled at the end of the band-shaped plate material 5-1 on the other side. 5-1 and 5-2
The fastening bolt 5-3 is attached to the through holes 5-1d and 5-2d formed in the flat wall portion. In the same manner as described above, heat-shrinkable resin cylinders P1-1 and P2-1 having an adhesive property on the inner peripheral surfaces are attached to the two pipes P1 and P2 on the clamped portions of the respective pipes. It is laid down by being fixed by heating. That is, in the pipe fixing structure shown in FIG. 7, the locking protrusion 5-2c of the other band-shaped plate member 5-2 is engaged with the locking hole 5-1b of the band-shaped plate member 5-1. 2
The pipes P1 and P2 are vertically stacked in two stages,
1, 5-2 between the holding walls 5-1a and 5-2a, and the resin pipes P1-1, P2-1 of the respective pipes P1, P2.
The retaining wall 5-2a of the clamp body 5 is resiliently engaged with the outer peripheral portion of the clamp body 5 with the mutual tightening by the tightening bolts 5-3, so that the protrusions 5-2b are made of resin cylinders P1-1 and P2. −
1 is configured to be pressed into the outer peripheral surface in a biting manner.

In the pipe holding and fixing structure shown in FIGS. 4 to 7, in the case of a resin-coated tube having a resin layer formed on the outer surface over substantially the entire length by extrusion molding or the like, a clamp body is provided on the outer surface of the resin layer. The holding walls are elastically engaged with each other by fastening bolts, and the projections provided on the holding walls are pressed into the outer peripheral surface of the resin layer in a biting manner. In addition, the pipes are arranged such that a plurality thereof are arranged on a plane as shown in FIGS. 1 to 5, or are arranged in a multi-stage form as shown in FIGS. The thickness of the clamp bodies 1 to 5 is appropriately selected according to the number and diameter of the pipes to be held.

[0016]

As described above, the pipe holding and fixing structure using the clamp body according to the present invention can be easily assembled by forming the clamp body with two strip-shaped plate members. Work can be performed easily and quickly.
By tightening a pair of clamp bodies, a plurality of resin layers are provided on the inner peripheral surface side of the resin-coated tube in which a resin layer is applied over substantially the entire length of the resin cylindrical body portion or the outer peripheral surface fixed to the clamped portion of the pipe. It is attached and engaged by the holding wall portion having the projection, and a large pipe holding force is obtained by the biting pressure on the cylindrical piece by the projection portion due to the fastening, so that the wall thickness is increased. Even with a thin plate material, the holding force of the pipe can be sufficiently ensured, mutual displacement and rotation at the fixed part can be reliably prevented for a long time even under vibration, and caulking work Further, since there is no need for a caulking tool, there are many excellent effects, such as eliminating troublesome work and enabling efficient holding and fixing work.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a structure for holding and fixing a pipe having no resin layer on an outer surface by a clamp body according to the present invention.

FIG. 2 is a plan view showing one embodiment of a holding and fixing structure for a resin-coated tube having a resin layer over substantially the entire outer surface.

FIG. 3 is a vertical cross-sectional view taken along the line II in FIG. 1;

FIG. 4 is a view showing a second embodiment of a structure for holding and fixing a pipe having no resin layer on the outer surface by the clamp body according to the present invention;
FIG.

FIG. 5 is a view showing a third embodiment of the holding and fixing structure of the pipe having no resin layer on the outer surface by the clamp body according to the present invention.
FIG.

FIG. 6 is a view showing a fourth embodiment of a structure for holding and fixing a pipe having no resin layer on the outer surface by the clamp body according to the present invention;
FIG.

FIG. 7 is a view showing a fifth embodiment of the holding and fixing structure for piping having no resin layer on the outer surface by the clamp body according to the present invention.
FIG.

FIG. 8 is a longitudinal sectional view showing an example of a conventional structure for holding and fixing a pipe by a clamp body.

FIG. 9 is a longitudinal sectional view showing another example of a conventional structure for holding and fixing a pipe by a clamp body.

[Description of symbols] 1, 2, 3, 4, 5 Clamp body 1-1, 1-2, 2-1 2-2, 3-1, 3-2, 4
-1, 4-2, 5-1 and 5-2 strip-shaped plate materials 1-2a, 2-1a, 3-2a, 4-1a, 4-2a,
5-2a Concave holding wall 1-2b, 2-1b, 3-2b, 4-2b, 5-2b
Projection 1-1b, 2-1c, 3-1a, 4-1c, 5-1b
Lock hole 1-2c, 2-2a, 3-2c, 4-2c, 5-2c
Locking pieces 1-3, 2-3, 3-3, 4-3, 5-3 Tightening bolts P1, P2 Piping without resin layer on outer surface P3, P4 Resin coated tube with resin layer on outer surface P1- 1, P2-1 Resin cylindrical body P3-1, P4-1 Resin layer

Claims (1)

[Claims] 1. A holding and fixing structure having a resin layer on at least an outer peripheral surface of a clamp portion of a pipe and holding and fixing the resin layer portion by a clamp body, wherein the clamp bodies are mutually fixed. It consists of two band-shaped plate members having opposing holding walls and having a plurality of projections on at least one inner peripheral surface side of the holding wall, and one of the band-shaped plate members is locked to an end thereof. The other band-shaped plate member has a clamp body having an engaging protruding piece fitted into the engaging hole at the end thereof. A holding and fixing structure for a pipe by a clamp body, wherein a projection of the holding wall is bitely pressed against an outer peripheral surface of a resin layer of the pipe and the holding wall is elastically engaged.