JP2009068603A - Clamping instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamping instrument by which joint flanges for fluid pipes can be fastened in either direction of breadthwise and peripheral directions of a clamping band depending on the state of fluid-pipe installation. <P>SOLUTION: The clamping instrument for fixing a pair of jointing flanges has C-shaped sides. The clamping instrument includes a clamping-band body disposed for covering the peripheral part of the pair of jointing flanges, a clamping bolt provided between both ends of the clamping band body, and a nut to be screwed onto the clamping bolt. One end of the clamping bolt is fixed to one end of the clamping band body so as to swivel in the directions of the width and periphery of the clamping band. In the case where the clamping bolt is disposed breadthwise of the clamping band, both ends of the clamping band are held and secured by a grasping member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a clamp device for fixing a pair of joint flanges such as a fluid pipe.

2. Description of the Related Art Conventionally, as a clamping tool for fixing a joining flange portion such as a fluid pipe, a configuration in which the outer periphery of the joining flange portion is covered with a clamp band and fastened with a fastening bolt and nut (Patent Document) 1).
As shown in FIG. 6, the conventional clamp 70 is configured by a clamp band 73 that covers the outer periphery of the joint flange portion 72 of the fluid pipe 71, a tightening screw 75, and a tightening member 76.
The clamp band 73 is composed of a pair of clamp band constituting members 73a and 73b formed in a semicircular arc shape, provided with extending portions 74a to 74d projecting radially outward at both ends.
As shown in FIG. 7, one of the extending portions 74a and 74b of the clamp band constituting members 73a and 73b is hinged to the joint member 77 so as to be opened and closed.
Further, the fastening member 77 is formed of a plate-like body having a substantially U-shaped longitudinal section, and both end portions are hinged to the extending portion 74c so as to be rotatable in the circumferential direction, and the U-shaped central portion has the above-mentioned A tightening screw 75 is rotatably fitted.
The clamping tool 70 is clamped and fixed by covering the outer periphery of the joining flange portion 72 with a clamp band 73, rotating the clamping member 76 and engaging the extension portion 74d, and then tightening the clamping screw. This is performed by tightening 75 along the circumferential direction of the clamp band 73.
Further, the clamping tool 70 can be removed by loosening the tightening screw 75 in the circumferential direction, removing the tightening member 76 from the extending portion 74d, and opening the clamp band constituting member 73a outward in the circumferential direction. It becomes.

However, in the case of the above clamping tool, the tightening direction is limited to the circumferential direction of the clamp band 73, and there are obstacles in the vicinity of the tightening screw 75 or due to circumstances such as fluid pipes being densely packed, When there was no gap to insert, there was a problem that tightening and opening operations were extremely difficult.
Further, in the above case, there is a risk that a finger may come into contact with the fluid pipe at the time of tightening or releasing operation.

ACT 6-49889

  Therefore, the technical problem of the present invention is that when a joining flange portion such as a fluid pipe is fixed, the clamping operation can be performed from either the width direction or the circumferential direction of the clamp band regardless of the arrangement state of the fluid pipe. It is to provide a clamping device.

  In order to solve the above-mentioned problem, a clamp device according to the invention described in claim 1 is a clamp device for fixing a pair of joining flange portions, and is formed in a substantially C-shaped side surface, In the clamp tool comprising: a clamp band main body arranged to cover a peripheral surface portion; a tightening bolt disposed between both ends of the clamp band main body; and a nut screwed into the tightening bolt. One end of the bolt is fixed to one end of the clamp band main body so as to be rotatable between the clamp band width direction and the clamp band circumferential direction, and the tightening bolt is disposed along the clamp band width direction. In this case, it has a gripping member capable of gripping and fixing both end portions of the clamp band.

  Therefore, when the tightening bolt is disposed along the width direction of the clamp band, the gripping member is tightened along the width direction of the clamp band with a nut screwed into the tightening bolt. Thus, both ends of the clamp band are urged toward each other, and the clamp tool is fastened and fixed.

  In the clamp device according to the invention described in claim 2, a pair of extending portions projecting outward in the radial direction of the clamp band main body are formed at both ends of the clamp band main body, respectively. The base part of the tightening bolt is rotatably fixed to the projecting part, and the other extension part is formed with a bolt receiving part that accommodates the opposite base end side of the tightening bolt. The gripping member is disposed between the base end of the tightening bolt and the nut, and the clamp band is tightened via the gripping member when the nut is tightened. And

  Therefore, by tightening the nut from the outer side in the circumferential direction of the clamp band via the gripping member, both ends of the clamp band are urged toward each other, and the clamp tool is fastened and fixed.

  According to a third aspect of the present invention, there is provided the clamping device according to the third aspect, wherein the gripping member is disposed between the pair of extension portions so that both the pair of extension portions can be gripped when tightened by the nut. It is characterized by being formed in a length dimension larger than the interval dimension.

  Therefore, when the clamping bolt is arranged along the width direction of the clamp band, the clamping member and the clamp band are extended by tightening the clamping bolt along the width direction of the clamp band. The abutting part with the part is urged in the direction approaching each other, and the clamp tool is fastened and fixed.

  According to a fourth aspect of the present invention, the gripping member is formed in an arc shape that bulges toward the nut direction.

  Therefore, when the tightening bolt is disposed along the width direction of the clamp band, the nut screwed to the tightening bolt is tightened along the width direction of the clamp band, thereby The abutting portion with the extending portion of the clamp band is urged toward the arcuate top along the arcuate inner surface of the gripping member, and is urged in a direction close to each other, so that the clamp tool is fastened and fixed. Is done.

The invention according to any one of claims 1 to 4 is a clamp device for fixing a pair of joining flange portions, and is formed in a substantially C-shaped side surface so as to cover the peripheral surface portions of the pair of joining flange portions. A clamp band main body, a clamp bolt disposed between both ends of the clamp band main body, and a nut screwed into the clamp bolt, wherein one end of the clamp bolt is When the clamp band is fixed to one end of the clamp band body so as to be rotatable between the clamp band width direction and the clamp band circumferential direction, and the clamp bolt is disposed along the clamp band width direction, the clamp band The clamp band can be clamped not only from the circumferential direction but also from the width direction of the clamp band.
As a result, even when a plurality of fluid pipes are densely packed and it is difficult to tighten the clamping tool in the circumferential direction of the joint flange in the joint flange of the fluid pipe, the tightening bolt is placed in the clamp band width direction. By rotating between the clamp band and the circumferential direction of the clamp band, the clamp band can be tightened from the width direction, and maintenance of the fluid pipes and packings can be performed safely and easily.
Further, in the invention described in claim 2, it is possible to perform tightening from the circumferential direction as in the case of the conventional clamp.
Therefore, if necessary, the clamping direction of the clamp can be selected from the circumferential direction or the width direction of the clamp band, and the maintenance of the fluid pipes and packings can be performed more safely and easily.
Furthermore, in the invention according to claim 4, since the grip member is formed in an arc shape that bulges toward the nut direction, the grip member and the extension portion of the clamp band Since the contact portion moves toward the arcuate top along the arcuate inner surface of the gripping member, the tightening operation can be performed more smoothly, and work efficiency and safety are further improved. Is possible.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings, taking as an example a case where the gripping member is formed in an arc shape that bulges toward the nut direction.
As shown in FIGS. 1 and 2, the clamp tool 10 is configured to fix the joining flange portions 12 and 12 formed at the end portions of the fluid pipes 11 and 11, respectively.
The clamp tool 10 is formed in a substantially C-shaped side surface, and is disposed between the clamp band main body 13 disposed so as to cover the peripheral surface portions of the joint flange portions 11 and 11, and both end portions 14 and 15 of the clamp band main body 13. When the tightening bolts 16, the nuts 17 screwed into the tightening bolts 16, and the tightening bolts 16 are disposed along the width direction of the clamp band 13, both end portions of the clamp band And a gripping member 18 that can grip and fix the pins 14 and 15.
Further, as shown in FIG. 2, the clamp band main body 13 includes clamp band constituting bodies 13 a and 13 b fixed to the hinge portion 19 so as to be openable and closable.
As shown in FIG. 1, a pair of extending portions 20 and 21 projecting radially outward of the clamp band main body 13 are formed at both end portions 14 and 15 of the clamp band main body 13, respectively. A base end portion 16a of the tightening bolt 16 is fixed to the portion 20 so as to be rotatable between the circumferential direction and the width direction of the clamp band 13, and the other extension portion 21 has the above-mentioned When the tightening bolt 16 is disposed along the circumferential direction of the clamp band 13, a bolt receiving portion 22 is formed in which the opposite base end side 16 b of the tightening bolt 16 can be accommodated.
The gripping member 18 is disposed between the base end portion 16 a of the tightening bolt and the nut 17.
When the gripping member 18 is tightened by the nut 17, the gripping member 18 is larger than the distance between the pair of extension parts 20, 21 so that both the pair of extension parts 20, 21 can be gripped. The length is formed.
Further, the gripping member 18 is formed in a substantially arc-shaped side surface that bulges toward the nut 17.

Embodiments having the above-described configuration will be described with reference to the drawings.
As shown in FIGS. 1 to 4, when connecting and fixing the joining flange portions 12 and 12 of the fluid pipes 11 and 11, the components 13 a and 13 b of the clamp band 13 are opened by the hinge portion 19, and the joining flange portion is formed. It arrange | positions so that the outer peripheral part of 12 and 12 may be covered.

When the tightening operation is performed from the width direction of the clamp band 13, the tightening bolt 16 is rotated to a position along the width direction of the clamp band 13 as shown in FIGS.
The gripping member 18 is positioned on the side of the clamping nut 17 in the width direction of the clamp band 13, and the gripping member 18 is applied to the extending portions 20 and 21 of the clamp band 13 from the outer side in the circumferential direction on the inner side surface 23. Make contact.
In the above-described state, the extending portions 20 and 21 and the inner surface 23 of the gripping member 18 are tightened by the tightening nut 17 through the gripping member 18 along the width direction of the clamp band 13. The abutting portions move in directions close to each other along the inner surface 23, and as a result, the clamp band 13 is tightened.

  Therefore, even when the clamping operation from the circumferential direction of the clamp band 13 is difficult, such as when the fluid pipes 11 are densely packed in the lateral direction, the clamping band 13 can be tightened from the width direction. In addition, maintenance of the fluid pipes and packings can be easily performed.

Further, in the case of performing the tightening operation from the circumferential direction of the clamp band 13, as shown in FIGS. 3 to 4, the tightening bolt 16 is rotated to a position along the circumferential direction of the clamp band 13 and is illustrated in FIG. As described above, the opposite base end side 16 b of the tightening bolt 16 is accommodated in the bolt receiving portion 22 provided in the extending portion 21 of the clamp band 13.
Further, the inner surface 23 of the gripping member 18 is brought into contact with the extending portion 21 from the outer side in the circumferential direction, and the clamping nut 17 is tightened from the outer side in the circumferential direction of the clamp band 13 via the gripping member 18. As a result, the clamp band 13 is tightened.

  Therefore, even if it is difficult to tighten the clamp band 13 from the width direction depending on the arrangement state of the fluid pipe 11, the clamp band 13 can be tightened from the circumferential direction, and the fluid pipe and the packing can be safely and easily performed. Maintenance is possible.

  Since the clamping direction of the clamp band 13 can be freely changed as described above, it is possible to provide a clamping device that can be applied to various forms of fluid pipe arrangements and has high safety. Is possible.

As shown in FIG. 5, the shape of the gripping member 18 constituting the clamp tool 10 is formed in a shape having a tapered inner surface that is formed in a substantially V-shaped side surface and whose angle decreases toward the tightening nut 17 side. It is also possible to do.
In addition, about a component other than the above in a present Example, it is the same as that of Example 1, and the effect | action and effect are also the same as that of Example 1. FIG.

  In addition, in Example 1 and another Example, although the fixation object of the clamp tool 10 is made into the joining flange part which connects a pair of fluid pipes, if it has a joining flange part, components other than a fluid pipe The present invention can also be applied to the joining.

The present invention can be widely applied to a clamp for fixing a pair of joint flanges such as a fluid pipe.

1 shows an embodiment of a clamp device according to the present invention, and is a side view showing a tightening state from the width direction of a clamp band in the form of Example 1. FIG. 1 shows an embodiment of a clamp device according to the present invention, and is a plan view showing a clamped state from the width direction of a clamp band in the form of Example 1. FIG. 1 shows an embodiment of a clamp device according to the present invention, and is a side view showing a clamped state from a circumferential direction of a clamp band in the form of Example 1. FIG. 1 shows an embodiment of a clamp device according to the present invention, and is a plan view showing a tightening state from a circumferential direction of a clamp band in the form of Example 1. FIG. It is a side view which shows other embodiment of the clamp tool which concerns on this invention, and shows the clamping | tightening state from the width direction of a clamp band. It is a top view of the clamp tool in a prior art. It is a perspective view of the state which opened the clamp tool in the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Clamping tool 11 Fluid pipe 12 Joining flange part 13 Clamp band 13a Clamp band structure 13b Clamp band structure 14 One end part 15 of the clamp band 13 The other end part 16 of the clamp band 13 Tightening bolt 16a Tightening bolt base end 16b 17 Tightening nut 18 Gripping member 19 Hinge coupling part 20 Extension part 21 Extension part 22 Bolt receiving part 23 Gripping member inner surface

Claims (4)

A clamping device for fixing a pair of joining flange portions,
A clamp band body formed in a substantially C-shaped side surface and arranged to cover the peripheral surface portions of the pair of joint flange portions, a clamping bolt disposed between both ends of the clamp band body, and the tightening In the clamp having a nut screwed to the bolt, one end of the tightening bolt is fixed to one end of the clamp band body so as to be rotatable between the clamp band width direction and the clamp band circumferential direction. A clamping device comprising a gripping member capable of gripping and fixing both ends of the clamp band when the tightening bolt is disposed along the clamp band width direction.
A pair of extending portions projecting outward in the radial direction of the clamp band main body are formed at both ends of the clamp band main body, and the base end portion of the tightening bolt is formed on the one extended portion. A bolt receiving portion is formed on the other extension portion and accommodates the opposite base end side of the tightening bolt. The base end portion of the tightening bolt, the nut, The clamping device according to claim 1, wherein the gripping member is disposed between the clamp band and the clamp band is tightened via the gripping member when the nut is tightened.
The gripping member is formed in a length dimension larger than a distance dimension between the pair of extension parts so that both of the pair of extension parts can be gripped when tightened by the nut. The clamping device according to claim 2, wherein:
  The said holding member is formed in the circular arc shape which bulges toward the said nut direction, The clamp tool of any one of Claims 1-3 characterized by the above-mentioned.