JP2002303039A - Linking clamp for tubular material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe linking clamp, which easily and positively maintains engagement between an engaging projection and an engaging recess thereof when the clamp is applied to link mutually perpendicular pipes, and prevents occurrence of inconveniences, such as damages in a bound body. SOLUTION: The pipe linking clamp 11 consists mainly of a pair of clamp main bodies 12 linked to each other. One of the clamp bodies 12 includes a male screw rod 28, which has a restraining member 32 axially supported at its base-side end in a rotatable manner. The restraining member 32 includes an intermediate wall portion 33, and an engaging piece 34, having the engaging projection 36 protruded from the center thereof, is protruded from an end of the intermediate wall portion 33. The intermediate wall portion 33 and the engaging piece 34 are formed arcuately conforming to a peripheral surface of a pipe section 14. The other clamp body 12 includes a rigid wrapping body 13 which has the engaging recess 35 formed therein. When the engaging piece 34 engages with the engaging recess 35, the engaging projection 36 engages with an inner surface of the engaging recess 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp used for connecting pipes when building a scaffold or the like with a plurality of pipes at a construction site or the like.

[0002]

2. Description of the Related Art Conventionally, as a clamp fitting for connecting a pipe member of this type, for example, one having a configuration as disclosed in Japanese Patent Publication No. 7-96833 is known.

[0003] In this conventional configuration, a pair of clamp fitting main bodies capable of clamping a tube material is provided. The fixed holding bodies of the respective clamp fitting bodies are formed in an arc shape, and are rotatably and inseparably connected to each other by a coupling body. One end of the fixed holding body has a first
One end of an arc-shaped movable holding body is rotatably supported via a rotation support shaft.

[0004] At the other end of the fixed holding member, a male threaded rod constituting a fastening portion is rotatably supported via a second rotation support shaft. The distal end of the male screw rod engages with the other end of the movable holding body, and the distal end side thereof is screwed with a tightening nut constituting a fastening portion. Then, after the male threaded rod is engaged with the other end of the movable holding body, the clamping nut is tightened, so that the clamp body surrounds the tube and is tightened.

A regulating member is rotatably supported at the base end of the male screw rod via a second rotation support shaft. The restricting member is formed in a substantially U-shape in plan view, and an engaging convex portion is provided on an intermediate wall portion integrally connecting between both side walls to project inward from the intermediate wall portion.

An engaging recess is formed in the side wall of the fixed holding body at a position corresponding to the engaging protrusion when the central axes of the two clamp members are perpendicular to each other. By engaging the engaging projections with the engaging recesses, the rotation of the two clamp members is restricted in a state where the center axes of the two clamp members are perpendicular to each other.

For this reason, the clamp fitting for connecting the pipe material is provided with an orthogonal type which clamps the pipe materials in a state where the central axes of the two clamp metal fittings are perpendicular to each other by the engagement between the engaging convex portion and the engaging concave portion. By releasing the engagement between the convex portion and the engaging concave portion, the clamp can be used also as a free mold for clamping the tube members in a state where the central axes of both clamps intersect at an appropriate angle.

[0008]

However, in this conventional clamp for connecting pipes, when the pipes are clamped by using the clamp for connecting pipes as an orthogonal type, the two clamp bodies are connected to the connecting body and the clamp. The connection is established by the engagement between the engaging projection and the engaging recess. However, since the engagement convex portion is only engaged with the engagement concave portion in the loosely fitted state, when an external vibration or load is applied to the tube material connecting clamp, the engagement convex portion and the engagement concave portion are not engaged. Is disengaged.

At this time, since the load applied from the outside to the pipe connecting clamp is concentrated on the joined body,
There was a problem that a defect such as damage occurred in the combined body. The present invention has been made by paying attention to the problems existing in the prior art as described above. The purpose is to easily and surely maintain the engagement between the engaging projections and the engaging recesses in the use state of the orthogonal type, and to prevent a failure such as damage to the combined body. It is an object of the present invention to provide a clamp fitting for connecting a pipe material.

[0010]

According to a first aspect of the present invention, there is provided a clamp for connecting a tubular member, comprising: a fixed holding member attached to the tube; and one end of the fixed holding member. A pair of clamp metal bodies each including a movable holding body that is rotatably supported by a provided rotation support shaft and a fastening portion that fastens the other end of the fixed holding body and the tip of the movable holding body. In a clamp for connecting pipe members, the fixed holding members being rotatably and inseparably connected to each other, the fixed holding member of one of the clamp fitting bodies has a pipe member connecting clamp metal which is orthogonal to each other. When clamping, a regulating member having a substantially U-shaped cross section for regulating the relative rotation of the fixed holding bodies is rotatably supported, and is an intermediate member for integrally joining between both side walls of the regulating member. When the wall is formed in an arc shape corresponding to the outer peripheral surface of the pipe material, At the end portion, an engaging projection formed in an arc shape corresponding to the outer peripheral surface of the tube is protruded, and a locking projection inward is formed at the center of the engaging projection. The other side of the fixed holding body of the clamp body has an engagement recess for engaging with the engagement protrusion, and the engagement protrusion is engaged with the engagement recess. When they are combined, the locking projection is configured to engage with the inner surface of the engagement recess.

According to a second aspect of the present invention, there is provided a clamp for connecting a pipe material according to the first aspect of the present invention, wherein the locking projection is formed by pressing.
In the clamp for connecting a pipe material according to the third aspect of the present invention,
In the invention according to claim 1 or 2, the protrusion amount of the locking projection is set in a range of 0.5 to 1.5 mm.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 3, the pipe connection clamp 11 is mainly composed of a pair of connected clamp bodies 12. Note that the upper, lower, left, and right in the following description correspond to the upper, lower, left, and right in FIG.

[0013] As shown in FIG.
The outer surface side is formed flat, and the inner surface side has a substantially horizontal L-shape having a first contact portion 15 formed in an arc shape along the outer peripheral surface of the tube material 14. And is detachably attached to the pipe member 14. As shown in FIGS. 1 to 3, the first contact portion 15
A through hole 16 is formed at the center of the hole. Then, after the first contact portions 15 of the pair of clamp fitting bodies 12 are arranged to face each other, the coupling bodies 17 are inserted into the respective through holes 16, and the coupling bodies 17 are swaged to form the pair of clamp fitting main bodies 12. Numerals 12 are rotatably and inseparably connected to each other.

As shown in FIG. 3 and FIG.
A first rotation support piece 18 having a U-shaped cross section is bent at one end of the third support member 3, and a second rotation support piece having a U-shaped cross section is formed at the other end of the fixed holding body 13. The piece 19 is bent. The width of the first rotation support piece 18 is
And the width of the second rotation support piece 19 is smaller than the width of the fixed holding body 13.

On both sides of the fixed holding body 13, first side walls 20 each having an arcuate inner peripheral surface are provided so as to protrude inward. Then, when the clamp fitting body 12 clamps the tube 14, the inner peripheral surface of the first side wall 20 comes into contact with the outer peripheral surface of the tube 14.

As shown in FIGS. 1 and 3, the movable holding body 21 constituting the clamp fitting body 12 is formed in an arc shape. A third rotation support piece 22 having a U-shaped cross section is formed at one end of the movable holding body 21. The third rotation support piece 22 is connected to the first rotation support piece 1 of the fixed holding body 13 via a first rotation support shaft 23 as a rotation support shaft.
8 is rotatably supported.

As shown in FIGS. 3 and 4, the movable holding body 2
A nut receiving portion 24 is formed at the other end of 1. A fitting recess 25 that opens toward the distal end is formed in the central portion in the longitudinal direction of the nut receiving portion 24. The width of the movable holding body 21 is determined by the distance between the third rotation support piece 22 and the nut receiving portion 2.
4 and a second side wall 26 having an arcuate inner peripheral surface on both sides thereof.
Are protruded toward the direction parallel to the central axis of each of them.

At a substantially central portion in the longitudinal direction of the movable holding body 21, two substantially abutment portions 27 each having a substantially rectangular front face are provided so as to protrude inward at two places. And the clamp fitting body 1
When the tube 2 clamps the tube 14, the second side wall 26 and the second contact portion 27 are in contact with the outer peripheral surface of the tube 14, respectively.

As shown in FIGS. 1 and 3, the male screw rod 28 constituting the fastening portion is rotated by the second rotation support piece 19 of the fixed holding body 13 via the second rotation support shaft 29. It is supported as much as possible. A male screw part 30 is threaded on the outer peripheral surface of the male screw rod 28, and a fastening nut 31 constituting a fastening part is screwed to a tip part of the male screw part 30.

In one clamp body 12 of the pair of clamp bodies 12, a flat surface is provided on the outside of the second rotation support piece 19 of the fixed holding body 13 via a second rotation support shaft 29. A substantially U-shaped restricting member 32 is rotatably supported from a rotation restriction release position indicated by a two-dot chain line in FIG. 1 to a rotation restriction position indicated by a solid line in FIG. Control member 3
An engagement piece 34 as an engagement projection is provided on the intermediate wall portion 33 which integrally connects the two side wall portions to project inward from the intermediate wall portion 33. The intermediate wall portion 33 and the engagement piece 34
Are respectively formed in an arc shape corresponding to the outer peripheral surface of.

As shown in FIG. 4, the other stationary holding body 13
In the first side wall 20, an arc-shaped engagement recess 35 as an engagement recess is provided at a position corresponding to the engagement piece 34 in a state where the center axes of both clamp fitting bodies 12 are orthogonal to each other. Have been. For this reason, as shown by the solid line in FIG.
The two central axes are orthogonal to each other.

As shown in FIGS. 1 and 3, at the center of the engagement piece 34, a locking projection 36 is formed by pressing to protrude inward. As shown by the solid line in FIG. 1, when the engaging piece 34 is rotated to the rotation restricting position, the locking projection 36 is brought into contact with the inner surface of the engaging recess 35 as shown by the solid line in FIG. To engage, the engagement piece 3
4 is firmly engaged with the engagement recess 35.

When the protrusion of the locking projection 36 is less than 0.5 mm, the engagement between the locking projection 36 and the inner surface of the engagement recess 35 is insufficient. It becomes difficult to release the engagement between the stop projection 36 and the inner surface of the engagement recess 35. For this reason, the projecting amount of the locking projection 36 is 0.5 to
It is set in the range of 1.5 mm.

Further, the pipe fitting clamping fitting 11
As shown by a two-dot chain line in FIG. 1, a pivot type in which the center axes of both clamp metal bodies 12 intersect at an appropriate angle by rotating the engagement piece 34 to the rotation restriction release position is configured. ing.

Next, the operation of the clamp member 11 for connecting a pipe material having the above configuration will be described. Now, when the tube members 14 are clamped with each other by using the tube member connecting clamp fitting 11 as an orthogonal type, as shown in FIG. 3, the clamp member provided with the regulating member 32 of the pair of clamp fitting main bodies 12 is provided. In the metal fitting body 12, first, the tightening nut 31 is used.
And turn the male screw rod 28 upward.

Next, the fixed holding body 1 is attached to the outer peripheral surface of the tube material 14.
The third first side wall 20 is brought into contact. And the movable holding body 2
After the first second side wall 26 and the second contact portion 27 are brought into contact with the outer peripheral surface of the tubular member 14, the nut receiving portion 24 of the movable holding body 21 is
The male screw rod 28 is fitted into the fitting recess 25, and the tightening nut 31 is tightened.

Next, the regulating member 32 is rotated to the regulating position shown by the solid line in FIG. As a result, the rotation of each clamp fitting body 12 is restricted, and both clamp fitting bodies 1 are rotated.
The two central axes are orthogonal. At this time, the engagement piece 34 is fitted into the engagement recess 35, and the locking projection 36 is locked on the inner surface of the engagement recess 35.

Next, in the other clamp body 12, the same operation as described above is performed to fix the tube 14 to the clamp body 12, so that the tubes 14 can be clamped in an orthogonal state.

When the tube member 14 is clamped by using the tube member connecting clamp member 11 as a free mold, first, the restricting member 32 is connected to the clamp member main body 12 of the pair of clamp member main bodies 12. It is rotated to the rotation restriction release position indicated by the two-dot chain line in FIG. As a result, the regulation of the rotation of each clamp fitting body 12 is released, and thus each clamp fitting body 12 can freely rotate with respect to each other.

Next, after the movable holding body 21 of one clamp fitting main body 12 is opened, the first side wall 20 of the fixed holding body 13 is brought into contact with the outer peripheral surface of the tube material 14. Then, after the second side wall 26 and the second contact portion 27 of the movable holding member 21 are brought into contact with the outer peripheral surface of the tubular member 14, the male screw rod is inserted into the fitting recess 25 of the nut receiving portion 24 of the movable holding member 21. 28 is fitted, and the tightening nut 31 is tightened.

By fixing the tube member 14 to the clamp member body 12 in the other clamp member body 12 in the same manner as described above, the tube members 14 can be clamped in a state where they intersect at an appropriate angle. it can.

Also, by performing the reverse operation as described above,
The tube connection clamp 11 can be removed from the tube 14. According to the embodiment described in detail above, the following effects are exhibited.

In the tube fitting clamping fitting 11 of the present embodiment, a locking projection 36 is provided at the center of the engaging piece 34 to protrude. For this reason, the pipe connection clamp 1
When the tube material 14 is clamped by using 1 as an orthogonal type, the locking projection 36 engages with the inner surface of the engagement recess 35.
Therefore, the engagement between the engagement piece 34 and the engagement recess 35 can be reliably maintained, and the strength of the tube material connecting clamp fitting 11 as an orthogonal type can be increased. At this time, since no load is applied to the coupling body 17, it is possible to prevent the failure such as damage to the coupling body 17 from occurring.

In the tube fitting clamp 11 of the present embodiment, the projection of the locking projection 36 is 0.5 to 1.
It is set in the range of 5 mm. Therefore, when the tube 14 is clamped by using the tube connecting clamp 11 as an orthogonal type, the engaging piece 34 can be easily engaged with the engaging recess 35 and the engaging piece 34 can be engaged with the engaging recess 34. Engagement with the recess 35 can be reliably maintained. In addition, when the tube material connecting clamp 11 is removed from the tube material 14, the engagement between the engagement piece 34 and the engagement recess 35 can be easily released.

The above embodiment can be modified as follows. A pair of the engagement recesses 35 may be provided at opposing positions sandwiching the axis of the coupling body 17 of the first side wall 20. In the case of such a configuration, the engaging piece 34 is fixed to the clamp metal body 12 having the regulating member 32 regardless of whether the fixed holding body 13 of the other clamp metal body 12 rotates in the left or right direction. Can be engaged with the engagement recess 35, and the tube members 14 can be clamped with each other by using the tube member connecting clamp fitting 11 as an orthogonal type.

The regulating member 32 may be provided on both clamp fitting bodies 12. In the case of such a configuration, since the engagement between the engagement piece 34 and the engagement recess 35 is performed at two points, the clamp fitting 1 for connecting the pipe material as an orthogonal type is used.
1 can be further enhanced.

Next, the technical ideas that can be grasped from the above embodiment will be described below. The clamp member for pipe connection according to any one of claims 1 to 3, wherein the regulating member is provided on only one of the pair of clamp member main bodies. According to this configuration, in the use state of the orthogonal type, the orthogonal type can be easily and reliably maintained, and it is easy to manufacture the clamp fitting for connecting pipes, which can prevent a failure such as damage to the combined body. Thus, manufacturing costs can be reduced.

[0038] The control member according to any one of claims 1 to 3, wherein the regulation member is rotatably supported by a rotation support shaft that rotatably supports a fastening portion provided at the other end of the fixed holding member. The clamp for connecting a pipe material according to any one of the preceding claims. According to this configuration, in addition to the effects of the invention described in any one of the first to third aspects, the rotation support shaft can also be used.
For this reason, when the orthogonal type is used, the orthogonal type is easily and reliably maintained, and the number of parts of the tube connecting clamp which can prevent the failure such as damage to the joined body is reduced. And the manufacturing cost can be further reduced.

[0039]

Since the present invention is configured as described above, it has the following effects. According to the first aspect of the present invention, the engagement between the engaging projection and the engaging recess is easily and surely maintained in the orthogonal use state, and the joint is damaged. Can be prevented from occurring.

According to the second aspect of the present invention, in addition to the effects of the first aspect,
The processing of the locking projection is easy, and the manufacturing cost can be saved.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, in addition to the effects of the first and second aspects of the present invention, the tube material is formed by using the tube material connecting clamp as an orthogonal type. At the time of clamping, the engagement protrusion can be easily engaged with the engagement recess, and the engagement between the engagement protrusion and the engagement recess can be reliably maintained. Further, when removing the pipe material connecting clamp from the pipe material, the engagement between the engagement convex portion and the engagement concave portion can be easily released.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a tube fitting clamp according to an embodiment of the present invention, and is a cross-sectional view taken along line 1-1 of FIG.

FIG. 2 is a sectional view taken along line 2-2 in FIG. 3;

FIG. 3 is a perspective view showing a state in which a clamp for connecting a pipe material is being attached to the pipe material.

FIG. 4 is a front view showing a tube material connecting clamp.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Clamp fitting for pipe material connection, 12 ... Clamp fitting main body, 13 ... Fixed holding body, 14 ... Tube material, 21 ... Movable holding body, 23 ... First rotation support shaft, 28 ... Male threaded rod, 31 ... Tightening nut , 32 ... regulating member, 33 ... intermediate wall part, 34 ...
Engagement pieces, 35: engagement recesses, 36: locking projections.

Claims (3)

[Claims] 1. A fixed holding body attached to a tube, a movable holding body rotatably supported by a rotating support shaft provided at one end of the fixed holding body, and a fixed holding body. A clamp member for connecting a fixed holding member rotatably and inseparably from a pair of clamping member bodies each including an end and a fastening portion for fastening a tip of a movable holding member; A restricting member having a substantially U-shaped cross section for restricting the relative rotation of the two fixed holding members when the tube connecting clamp clamps the tubes at right angles to each other. Is rotatably supported, and an intermediate wall portion integrally joining between both side walls of the regulating member is formed in an arc shape corresponding to the outer peripheral surface of the tube material, and the end portion of the tube material is An engagement projection formed in an arc shape corresponding to the outer peripheral surface is protruded, and the engagement projection is formed. At the center portion, a locking projection is projected inward, and an engagement recess for engaging with the engagement projection is formed on a side wall of the fixed holding body of the other clamp fitting body. A clamp for connecting a pipe material, wherein the engaging projection is engaged with the inner surface of the engaging recess when the engaging projection engages with the engaging recess. 2. The clamp according to claim 1, wherein the locking projection is formed by pressing. 3. The projecting amount of the locking projection is 0.5-1.
The clamp for connecting a pipe material according to claim 1 or 2, wherein the clamp is set to a range of 5 mm.