JPH1193918A - Pipe fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix and support the pipe axes of two pipes at an optional crossing angle by rotatably supporting the clamp parts of at least two clamps for holding pipes while holding their central, axes within the same virtual plane. SOLUTION: Clamp members 41 are rotated so that a reference line is made to coincide with a scale, a fixing screw 22 is loosened to release the fixation of arm divided bodies 21, and one arm divided body 21 is rotated around a hinge 53 together with a support member 51 to release a clamp 3. A pipe is arranged so as to be placed on one clamp member 41 of the clamp 3 in the state where it is fitted to a prescribed position of an elbow, the clamp 3 is closed, the fixing screw 22 is fastened to hold each pipe, and the elbow is fused to each pipe. Only by preparing one pipe fixture 1a, two pipes can be fixed and supported at an optional crossing angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a pipe fixing device.

[0002]

2. Description of the Related Art Pipes are joined via joints,
When joining a pipe and a joint, usually, a joining method using an adhesive or fusion is adopted.In any of the joining methods, until the adhesive is cured or until the molten resin is cured. During this time, it is necessary to keep the pipe and the joint in a predetermined fitted state.

[0003] Therefore, in order to keep the pipe and the joint in a predetermined fitting state, it is described in a general catalog of polyethylene pipes for Eslon gas manufactured by Sekisui Chemical Co., Ltd. A pipe fixture as described is used.

That is, as shown in FIG. 8, this pipe fixing device 100 is provided with clamp portions 102, 102 for holding pipes or joints connected to both ends of an arm portion 101.
And the arm 10
A clamp portion 103 is also provided in the middle of 1.

[0005] For example, a pipe fixture 100 is provided on both sides of a socket 200 as a fusion joint.
While the socket 300 is fitted to a predetermined fitting position, the socket 200 is disposed between the facing clamps 102, 102, and the clamps 102, 102 grip the pipes 300, 300 to form a predetermined connection with the joint. Is maintained.

Then, in this state, a power cord (not shown) of the welding machine is connected to the terminals 201, 201 of the socket 200, and electricity is supplied between the terminals 201, 201 to pipes 300, 201.
If the socket 300 and the socket 200 are fused, the socket 200 and the pipes 300 and 300 can be accurately maintained in a predetermined fitting state.
And can be joined.

[0007] Further, if a clamp portion 102 provided in the middle of the arm portion 101 and another clamp portion 101 are used, the clamp portion 102 is used even when pipes are arranged so as to be orthogonal to each other such as an elbow or a cheese. You can do it. That is, if one pipe fixing device 100 is prepared, it is possible to cope with a case where the pipes are arranged linearly and a case where the pipes are arranged orthogonally.

By the way, recently, in addition to the 90 ° elbow, 4
Although a 5 ° elbow is also on the market, the above-mentioned pipe fixture 1
In the case of 00, the pipe 300 and the pipe 300 can be used only when they are arranged linearly and when they are arranged orthogonally. Can not. Therefore, 4
It becomes necessary to prepare a pipe fixture for the 5 ° elbow.

However, at the time of piping, in addition to such a pipe fixing tool, tools such as a pipe surface scraping tool, a power tool for moving the scraping tool, an airtight test tool, and a pump for airtight test pressurization are required. Some are required for each size, and a considerable number of tools are required even with conventional tools alone. Therefore, when the number of tools further increases, there arises a problem that operations such as transporting, organizing and clearing the tools become more complicated.

[0010]

SUMMARY OF THE INVENTION In view of such circumstances, the present invention provides a pipe fixing device capable of fixing and supporting two pipes such that the pipe axes of the two pipes intersect at an arbitrary intersection angle. It is intended to be.

[0011]

According to the present invention, in order to achieve such an object, at least two clamps for holding a pipe are held at regular intervals via an arm. In the pipe fixing device, the at least two clamps are configured such that at least a clamp portion for directly gripping the pipe is rotatably supported while holding the clamp center axis in the same virtual plane.

In the pipe fixing device according to the present invention, the clamp may be configured such that the clamp is formed of two clamp members having a substantially semicircular cross section, and the clamp member is detachable. In addition, the mounted clamp member is rotatably supported in a state where the other clamp member and the inside of the arc face each other, and one end is rotatable in a direction perpendicular to the axes of both clamp portions via a hinge. It is preferable that a clamp body including two pivotally supported support members is provided, and the clamp body is integrated with the arm portion.

According to a third aspect of the present invention, the tip of the rotating shaft of the clamp portion penetrates the supporting member and is exposed on the outer peripheral surface of the supporting member. It is preferable that one of the surfaces is provided with a scale for positioning the support member rotation angle, and the other is provided with an index for matching the scale.

Further, according to the present invention, the curvature of the inner peripheral surface of the support member is constant in the width direction, and the support member and the clamp member satisfy the following formulas (1) and (2) L ≦ R · COS θ (1) r ≦ R (2) (where, in equations (1) and (2), R = the radius of curvature of the inner peripheral surface of the support member, and r = the outer peripheral surface of the clamp material) , L = length from the clamp center axis of the clamp portion of the clamp material to an arbitrary point on the outer peripheral surface of the clamp material, θ = intersection between the rotation center line of the clamp material and the virtual plane and the outer peripheral surface The angle is a crossing angle between a line connecting an arbitrary point and an imaginary dividing plane that divides the clamp material into two in the thickness direction.) The outer peripheral surface of is defined by the intersection of the rotation center line of the clamp and the virtual plane in the thickness direction of the clamp. It is preferably formed in a curved shape of radius of curvature r of the heart.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
The details will be described with reference to the drawings. 1 to 3 show an embodiment of a pipe fixing device according to the present invention.

As shown in FIGS. 1 to 3, the pipe fixing device 1a includes an arm portion 2 and a pair of clamps 3 and 3. The arm portion 2 is provided with clamps 3 at both ends, and is divided into two arm divided bodies 21 and 21 in the thickness direction.
2, so that they can be integrated.

The clamps 3 are provided at both ends of the arm 2 and include a clamp 4 and a clamp body 5.
The clamp body 5 is divided into two support members 51, 51 having a substantially semicircular cross section.

The support members 51, 51 are arranged such that the insides of the arcs face each other, one end of each is integrated with the end of the arm split body 21, and the other end is a hinge 53.
Is pivoted by That is, the clamp body 5
Loosen the fixing screw 22 of the arm part 2 and
When the support members 1 and 21 are opened, the support members 51 and 51 rotate about the hinge 53 and are opened.

As shown in FIG. 4, each of the support members 51 has a through hole 52 at the top of the arc.
A shaft pin 7 that supports a clamp member 41 to be described later and serves as a rotation axis of the clamp member 41 is rotatably fitted into the through hole 52, and the central inner wall surface of the arc is formed flat,
It is a receiving surface 51a of a clamp member 41 of a clamp portion 4 described later.

On the surface of the support member 51, three scales 54, 55, 56 serving as marks for positioning the shaft pin 7 are engraved on the periphery of the through hole 52. Three scales 54,
Of the 55 and 56, the scale 54 is provided in parallel with the central axis of the clamp 3, the scale 55 is provided at 22.5 ° with respect to the scale 54, and the scale 56 is tilted at 45 ° with respect to the scale 54. It is provided.

The shaft pin 7 is provided with a screw 72 at a portion protruding inside the arc of the support member 51, and
A mark line 71 parallel to the central axis of the clamp portion 4 is provided on a surface exposed outside the one arc. The clamp part 4 is composed of two clamp members (adapters) 4 having a substantially semicircular cross section.
1 and 41, and the receiving surface 51 of the support member 51
A flat sliding contact surface 42 in contact with a is provided, and a screw hole 43 is formed in the sliding contact surface 42.

That is, each of the clamp members 41 has a screw hole 4
3 can be mounted on the support member 51 by screwing the screw 72 of the shaft pin 7 to the support member 51, and the support member 51 is rotatably supported by the support member 51 about the shaft pin 7. And
The two clamp portions 4 formed by the clamp members 41, 41 rotate while holding the clamp center axis in the same virtual plane B.

Further, the clamp member 41 is provided in each of FIGS.
, The length from the intersection O of the rotation center line C of the clamp member 41 and the virtual plane B drawn by the clamp center axis with the rotation of the clamp portion 4 to the edge 41a of the outer peripheral surface of the clamp member 41 A and the radius of curvature R of the inner peripheral surface of the support member 51 are A
<R.

Therefore, the intersection point O and the edge 41a are connected.
Line and the thickness direction of the clamp material 41 including the rotation center line C.
Angle θ with virtual division plane D₁Then, during clamping
From the center axis C to the edge 41a of the outer peripheral surface of the clamp material 41
The length L is L = A · COSθ ₁Can be obtained by the formula
You. That is, since A <R, L <R · COS
θ₁It has become. Also, the maximum curvature of the clamp material 41 is half.
When the diameter is r, since r = L, r <R.
You.

In the figure, reference numeral 73 denotes an O-ring for preventing the shaft pin 7 from coming off the through hole 52.

Next, a method of connecting a fusion joint and a pipe using the pipe fixing device 1 will be described in detail with reference to an example in which a 45 ° elbow is used as a fusion joint. As shown in FIG. 1, first, the clamp members 41, 41 are rotated so that the marking lines 71 match the scales 55, respectively, and the fixing screws 22 are loosened to fix the arm divided bodies 21, 21. Cancel. Then, one arm divided body 21 is rotated together with the support member 51 about the hinge 53 to open the clamps 3.

Next, with the pipes P, P fitted to a predetermined position of the elbow E, the pipes P, P are arranged so as to rest on one of the clamp members 41, 41 of the opened clamps 3, 3. After that, the arm divided body 21 is clamped
Is rotated in the closing direction, and the fixing screws 22 are tightened to integrate the arm divided bodies 21 and 21, and the clamp members 41 and 41 clamp the pipes P and P firmly. That is, a fixed state is set.

Finally, although not shown, a cord of the fusion machine is connected to a terminal provided on the elbow E, and a predetermined power is supplied from the fusion machine to a heater wire embedded in the elbow E. The elbow E and the pipes P, P are fused together by the heat generated from the wire.

On the other hand, if each clamp member 41 is rotated so that the marked line 71 of the shaft pin 7 coincides with the scale 54, the same as in the case of using the 45 ° elbow described above, the socket member and the cheese are used. The pipes P, P can be connected in a straight line, and if each clamp member 41 is rotated so that the marked line 71 of the shaft pin 7 matches the scale 56, the pipe P , P can be connected in an orthogonal state.

Of course, it is also possible to rotate the shaft pin 7 so that the marked line 71 comes to a position that does not coincide with the scales 54 to 56.

As described above, since the clamp members 41 of the clamps 3 and 3 are rotatably supported on the pipe fixing device 1 as described above, the pipe fixing device 1 requires only one pipe fixing device 2 to prepare.
One pipe can be fixedly supported at an arbitrary intersection angle. Therefore, it is not necessary to prepare a plurality of pipe fixtures, and the number of tools can be reduced. That is, operations such as transporting, organizing, and clearing the tools can be reduced.

The pipe fixture 1 has a scale 54
５６56 and the marked line 71, 0 °, 4
The angle of the clamp can be easily adjusted to a general-purpose angle of 5 ° or 90 °, and the workability is more excellent.

Further, the support member 51 and the clamp member 4
1 satisfies the relationship of L ≦ R · COS θ and r ≦ R since L <R · COS θ ₁ and r <R, so that the clamp member 41 can be smoothly held without being held by the support member 51. Rotate.

Since the clamp member 41 is fixed by screws, the clamp member 41 can be easily attached and detached. Therefore, if a plurality of clamp members having different arc diameters are prepared, they can be used for fixing pipes of various diameters.

FIG. 6 shows another embodiment of the pipe fixing device according to the present invention. As shown in FIG. 6, in the pipe fixing device 1b, the inner peripheral surface of the support member 59 has an arc shape with a radius of curvature R over the entire circumference, and as shown in FIG. Maximum radius of curvature r = R
It has become. The configuration is the same as that of the pipe fixture 1a except that the outer peripheral surface of the clamp member 45 is formed in a curved shape having a radius of curvature r about the intersection O.

That is, in this pipe fixture 1b, the length L from the clamp center axis of the clamp portion of the clamp member of the clamp member 45 to an arbitrary point on the outer peripheral surface of the clamp member is all r.
COS θ (θ is an intersection angle between a line connecting an intersection point between the rotation center line of the clamp material and the virtual plane and an arbitrary point on the outer peripheral surface and a virtual division plane that divides the clamp material into two in the thickness direction. )).

Therefore, L = r · COS θ = R · CO
Sθ, and the support member 59 and the clamp member 45
The condition of ≦ R · COSθ and r ≦ R is satisfied, and the clamp member 45 rotates smoothly without being held by the support member 59. 6 and 7, the same members as those in FIGS.
The same numbers are given.

The pipe fixing device according to the present invention is not limited to the above embodiment. For example, in the pipe fixing device 1a, the arm portion 2 has two arm divided bodies 21 and 21.
And the clamp bodies 51, 51 are provided integrally with each of the arm divided bodies 21. However, a fixing screw for fixing the support member of each clamp body in a closed state while making the arm portion one rod-like shape. May be provided.

The above-mentioned pipe fixture 1a is provided with a receiving surface 5
Although 1a and the sliding contact surface 42 are flat, if the clamp material is rotatable, it may be kept in an arc shape.

In the above-mentioned pipe fixtures 1a and 1b, no position fixing means is provided on the shaft pin 7, but a position fixing means which can be fixed at a predetermined rotation position may be provided. Further, in the above-described embodiment, the pipe and the joint are fused, but may be bonded using an adhesive.

[0041]

As described above, the pipe fixing device according to the present invention can be used for joining using various joints having different bending angles since the clamp member is rotatable with respect to the support member. . Therefore, it is not necessary to prepare a plurality of pipe fixtures, and the number of tools can be reduced. That is, operations such as transporting, organizing, and clearing the tools can be reduced.

According to the second aspect, the clamp material can be easily replaced, and if a plurality of clamp materials having different arc diameters are prepared, they can be used for fixing pipes of various diameters. Become. Therefore, the number of tools can be further reduced. Further, according to claim 3,
The angle of the clamp can be easily adjusted to a predetermined angle, and the workability is further improved.

According to the fourth and fifth aspects, the clamp member smoothly rotates around the rotation axis.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a pipe fixing device according to the present invention.

FIG. 2 is a plan view showing an example of a use state of the pipe fixing device of FIG.

FIG. 3 is a side view of the pipe fixture of FIG. 1;

FIG. 4 is a sectional view of a clamp portion of the pipe fixing device of FIG. 1;

FIG. 5 is a sectional view taken along line XX of FIG. 3;

FIG. 6 is a side view showing another embodiment of the pipe fixing device according to the present invention.

FIG. 7 is a sectional view taken along line YY of FIG. 6;

FIG. 8 is a perspective view of a conventional pipe fixture in use.

[Explanation of symbols]

1a, 1b Pipe Fixture 2 Arm 3 Clamp 4 Clamp 41, 45 Clamp 41a Edge 5 Clamp Body 51, 59 Supporting Member 7 Axis Pin (Rotating Axis) 71 Marking Line (Index) 54, 55, 56 Scale B Virtual plane C Rotation center line of clamp material D Virtual division plane O Intersection points θ, θ ₁ Intersection angle

Claims (5)

[Claims] 1. A pipe fixing device in which at least two clamps for gripping a pipe are held at regular intervals via an arm portion, wherein the at least two clamps are:
A pipe fixing device, wherein at least a clamp portion for directly gripping a pipe is rotatably supported while holding the clamp center axis in the same virtual plane. 2. The clamp according to claim 1, wherein the clamp is formed of two clamp members having a substantially semicircular cross section, and the clamp member is detachably attached to the clamp member. 2 is rotatably supported in a state where the inside of the arc faces each other, and one end is pivotally supported by a hinge so as to be rotatable in the vertical direction to the axes of both clamp portions via a hinge.
The pipe fixing device according to claim 1, further comprising a clamp body formed of a single support member, wherein the clamp body is integrated with the arm portion. 3. A tip of a rotation shaft of the clamp portion penetrates the support member and is exposed on an outer peripheral surface of the support member, and one of the tip of the rotation shaft and the outer peripheral surface of the support member is provided. 3. The pipe fixing device according to claim 2, wherein a scale for positioning the support member rotation angle is provided on the other side, and an index for matching the scale is provided on the other side. 4. The curvature of the inner peripheral surface of the support member is constant in the width direction, and the support member and the clamp member satisfy the following equations (1) and (2): L ≦ R · COS θ (1) r ≦ R (2) (where, in the formulas (1) and (2), R = radius of curvature of the inner peripheral surface of the support member, r = maximum radius of curvature of the outer peripheral surface of the clamp member, L = clamp of the clamp member) The length from the clamp center axis of the part to an arbitrary point on the outer peripheral surface of the clamp member, θ = a line connecting the intersection of the rotation center line of the clamp member and the virtual plane and the arbitrary point on the outer peripheral surface, The pipe fixture according to any one of claims 1 to 3, wherein the dimension satisfies an angle of intersection with an imaginary division plane divided into two in the thickness direction. 5. An outer peripheral surface of the clamp member is formed in a curved shape having a radius of curvature r centered on an intersection of a rotation center line of the clamp member and an imaginary plane in a thickness direction of the clamp member. A pipe fixing device according to item 1.