JP2015058438A - Piping holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping holding device that holds piping so as to perform centering of two pieces of piping connected to each other.SOLUTION: A piping holding device 1 includes first and second holding arms 4 and 6 for holding a peripheral surface of piping 2 from different sides. The first and second holding arms have holding members 16,18, and 20 that abut on the peripheral surfaces of two pieces 2a and 2b of the piping to perform centering of the two pieces of the piping, and a first plate-like gauge 32 that is elongated between end surfaces of the two pieces of the piping in a direction substantially orthogonal to longitudinal axis lines of the two pieces of the piping.

Description

  The present invention relates to a pipe clamping apparatus, and more particularly to a pipe clamping apparatus that clamps a pipe for centering two pipes.

Conventionally, in order to center two pipes to be welded to each other, it is generally known to clamp and fix a connection portion between two pipes from both sides with two clamping arms. . For example, in order to clamp pipes of various specifications having a large diameter and a small diameter, the opening / closing state of the sandwiching arms is adjusted according to the dimensions of the pipes to be sandwiched.
Further, as a means for adjusting the opening / closing state of the holding arms, it is also possible to adopt a feed screw or the like connected to the holding arm and open and close the holding arms by a feed amount by rotation around the axis of the feed screw. .

  By the way, when butt-welding two pipes, in order to obtain a good weld, the interval between two pipes (route interval) is set to an appropriate interval according to the thickness of the pipe. Need to manage. Therefore, conventionally, an operator measures the interval between two pipes using a ruler or a caliper, and confirms whether a desired route interval is obtained.

  However, since it is necessary to measure the interval between the two pipes using a ruler or a caliper as described above, there is a problem that the operation becomes complicated. There is also a problem that the route interval measurement result is likely to have an error due to the route interval measurement position and the individual difference of the operator, and the route interval cannot be accurately managed. In addition, it is important to accurately manage the route interval between two pipes while pinching the pipes in a short time with a simple structure and performing efficient centering. There are no publicly known techniques or prior art documents that have solved the problem.

  Therefore, the present invention has been made to solve such a conventional problem, and when centering two pipes, the clamped pipes can be easily centered. An object of the present invention is to provide a piping clamping device that can accurately manage the interval between pipings and is easy to use with a simple structure.

In order to achieve the above object, the present invention provides a pipe clamping device for clamping a pipe to center two pipes to be connected to each other, and a plurality of pipes holding the peripheral surface of the pipe from different sides. The sandwiching portion is in contact with the peripheral surface of the two pipes, centering means for centering the two pipes, and the longitudinal axis of the two pipes The plate-shaped clearance gauge member extends between the end faces of the two pipes in a direction orthogonal to each other.
In the present invention configured as described above, the plurality of holding portions that hold the peripheral surfaces of the pipes from different sides are end faces of the two pipes in a direction substantially perpendicular to the longitudinal axis of the two pipes. Since there is a plate-shaped clearance gauge member extending between the two pipes, the distance between the two pipes is set between the end faces of the two pipes when the two pipes are held and connected by the clamping part. It is possible to manage the thickness of the clearance gauge member extending to Thereby, when centering two piping, the space | interval of the end surfaces of piping can be managed correctly. Further, by adjusting the thickness of the clearance gauge member extending between the end faces of the two pipes, the interval between the pipes can be easily managed to a desired value.

In the present invention, preferably, the clearance gauge member is provided between the two pipes so as to be insertable / removable in the radial direction of the pipes.
In the present invention configured as described above, the gap gauge member is inserted into and removed from the two pipes in the radial direction of the pipe, thereby managing the distance between the two pipes to the thickness of the gap gauge member. Or piping can be made to contact directly and the space | interval of piping can be managed much more easily.

In the present invention, preferably, the centering means is provided on the first contact portion that contacts the peripheral surface of one of the two pipes and on the peripheral surface of the other pipe of the two pipes. The clearance gauge member is provided between the first contact portion and the second contact portion of the centering means.
In the present invention configured as described above, the clearance gauge member is provided between the first contact portion and the second contact portion of the centering means. It can arrange | position easily between the end surfaces of piping.

In the present invention, preferably, the pipe clamping device has a plate-like additional gauge member that is stacked on the gap gauge member and extends between the end faces of the two pipes together with the gap gauge member.
In the present invention configured as described above, the plate-shaped additional gauge member is overlapped with the clearance gauge member and extends between the end faces of the two pipes. Therefore, the plate of the additional gauge member overlapped with the clearance gauge member By adjusting the thickness and number of sheets, the interval between the pipes can be managed to a desired value more easily.

In the present invention, preferably, the pipe clamping device extends substantially in the vertical direction, and extends substantially in the vertical direction, with the first clamping arm that holds the circumferential surface of the pipe from one side, and the circumferential surface of the pipe A second holding arm that holds the upper end of the first holding arm and the second holding arm in a rotatable manner, and one end portion along the first holding arm. The other end portion is provided so as to be movable along the second holding arm, and the first holding arm and the second holding arm are moved by moving up and down with respect to the support portion. A bridging member that opens and closes and a shaft member on which an external thread is formed. The lower end of the shaft member is fixed to the bridging member, and the bridging member is moved up and down by rotating the shaft member around the longitudinal axis. Male thread can be screwed onto the support so that it moves Each of the lower part of the first holding arm and the lower part of the second holding arm has one or a plurality of plate members having a predetermined plate thickness substantially orthogonal to the longitudinal axis of the two pipes. It is characterized in that it is provided so as to be insertable / removable between the two pipes.
In the present invention configured as above, one or a plurality of sheets substantially perpendicular to the longitudinal axis of the two pipes are respectively provided on the lower part of the first holding arm and the lower part of the second holding arm. Since the plate member having a predetermined plate thickness is provided so as to be insertable / removable between the two pipes, when the two pipes are held and connected by the first holding arm and the second holding arm, And the space | interval of these two piping can be managed to the plate | board thickness of the board member inserted between two piping. Thereby, when centering two pipes, the clamped pipes can be easily centered, and the interval between the pipes can be managed accurately. Moreover, the space | interval of piping can be easily managed to a desired value by adjusting the plate | board thickness and number of sheets of the board member inserted between two piping. Further, the pipes can be brought into direct contact with each other by extracting the plate member from between the two pipes.

In the present invention, preferably, the support portion, the first holding arm, the second holding arm, and the bridging member are formed symmetrically with respect to the central axis in the vertical direction. One or a plurality of plate members having a predetermined plate thickness that is substantially orthogonal to the longitudinal axis of each of the pipes are provided between the two pipes so that they can be inserted and removed.
In the present invention configured as described above, the central lower portion of the bridging member, the lower portion of the first holding arm, and the lower portion of the second holding arm are each substantially orthogonal to the longitudinal axis of the two pipes. Since one or a plurality of plate members having a predetermined plate thickness are provided so as to be insertable / removable between two pipes, the distance between the pipes is set at three locations along the circumference of the pipe. The thickness can be managed, and the interval between the pipes can be managed more accurately.

  According to the pipe clamping device of the present invention, when centering two pipes, the clamped pipes can be easily centered and the interval between the pipes can be accurately managed. .

It is a whole front view showing a piping clamping device by one embodiment of the present invention. It is a side view which shows the piping clamping apparatus by one Embodiment of this invention. It is an enlarged front view which shows the piping clamping apparatus by one Embodiment of this invention. It is an expanded side view which shows the piping clamping apparatus by one Embodiment of this invention. It is a figure which shows the holding part of the clearance gauge of the piping clamping apparatus by one Embodiment of this invention, Fig.5 (a) is a front view, FIG.5 (b) is a top view, FIG.5 (c) is a side view. . It is a figure which shows the 1st gauge of the clearance gauge of the piping clamping apparatus by one Embodiment of this invention, Fig.6 (a) is a front view, FIG.6 (b) is a side view. It is a figure which shows the 2nd gauge of the clearance gauge of the piping clamping apparatus by one Embodiment of this invention, Fig.7 (a) is a front view, FIG.7 (b) is a side view. It is a front view which shows the state which the piping clamping apparatus by one Embodiment of this invention clamped piping. It is a side view which shows the state which clamped two pipes to be welded using the piping clamping apparatus by one Embodiment of this invention.

Hereinafter, a pipe clamping device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is an overall front view showing a pipe clamping device according to one embodiment of the present invention, and FIG. 2 is a side view showing the pipe clamping device according to one embodiment of the present invention.
First, as shown in FIGS. 1 and 2, the pipe clamping device 1 according to an embodiment of the present invention clamps and connects the pipes before connecting the two pipes by welding or the like. It is for centering by aligning the central axes of the pipes by temporary attachment or fixing. This pipe clamping device 1 extends substantially in the vertical direction, and extends substantially in the vertical direction, with a first clamping arm 4 as a clamping part that holds the peripheral surface of the pipe 2 from one side. And a second clamping arm 6 as a clamping part for holding the peripheral surface from the other side.

Next, the piping clamping apparatus 1 is provided with the support part 8 which supports each upper end part 4a, 6a of these 1st clamping arms 4 and 2nd clamping arms 6 so that rotation is possible.
Further, the pipe clamping device 1 includes a bridging member 10. One end of the bridging member 10 is slidably connected along the guide groove 4b of the first holding arm 4, and the other end is slidable along the guide groove 6b of the second holding arm 6. The first clamping arm 4 and the second clamping arm 6 can be opened and closed by moving the bridging member 10 up and down relative to the support portion 8.
Further, the pipe clamping device 1 includes a shaft member 14 on which a male screw 12 is formed. The lower end of the shaft member 14 is fixed to the bridging member 10 and rotates the shaft member 14 around the central axis A1 in the longitudinal direction. By doing so, the male screw 12 can be screwed into the support portion 8 so that the bridging member 10 can move up and down.

  The support 8, the first clamping arm 4, the second clamping arm 6, and the bridging member 10 are formed symmetrically with respect to the vertical center axis A <b> 1, and the central lower portion of the bridging member 10, the first clamping arm. At the lower part of 4 and the lower part of the second clamping arm 6, holding members 16, 18, and 20 as substantially cylindrical centering means extending in the axial direction of the pipe 2 are provided so as to be in contact with the pipe 2. These holding members 16, 18, and 20 hold the pipe 2 at three points.

  Further, as shown in FIG. 2, the holding member 16 of the bridging member 10 is engaged with the peripheral surface of the pipe 2 in a state of being sandwiched between the first sandwiching arm 4 and the second sandwiching arm 6. A holding surface 16a as an abutting portion and a notch portion 16b cut out radially outward of the pipe 2 with respect to the holding surface 16a are formed and opposed to the pipe 2 in the notch portion 16b. An adjustment screw 22 is provided on the surface as a second contact portion that can come into contact with the pipe 2 by moving forward and backward in the radial direction of the pipe 2 in a sandwiched state. The tip of the adjustment screw 22 is formed in a conical shape.

  Further, as shown in FIGS. 1 and 2, the holding members 18 and 20 of the first holding arm 4 and the second holding arm 6 are also held in the same manner as the holding member 16 of the bridging member 10. Holding surfaces 18a and 20a as first abutting portions engaged with the peripheral surface of the pipe 2 and notches cut out radially outward of the pipe 2 with respect to the holding surfaces 18a and 20a. The portions 18b and 20b are respectively formed, and can be brought into contact with the pipe 2 by moving forward and backward in the radial direction of the pipe 2 in a sandwiched state on the surface of the notch 18b and 20b facing the pipe 2. Adjustment screws 24 and 26 are provided as second contact portions, respectively.

  Further, the holding member 16 of the bridging member 10, the holding member 18 of the first holding arm 4, and the holding member 20 of the second holding arm 6 are substantially connected to the longitudinal axis of the two pipes 2. A clearance gauge 28 orthogonal to the two pipes 2 is provided between the two pipes 2 so as to be inserted and removed.

Next, details of the clearance gauge 28 will be described with reference to FIGS.
FIG. 3 is an enlarged front view showing the pipe clamping device 1 according to one embodiment of the present invention, and FIG. 4 is an enlarged side view showing the pipe clamping device 1 according to one embodiment of the present invention. 5A and 5B are views showing a gripping portion of the clearance gauge 28 of the pipe clamping device 1 according to one embodiment of the present invention, in which FIG. 5A is a front view, FIG. 5B is a plan view, and FIG. ) Is a side view. FIG. 6 is a view showing a first gauge of the clearance gauge 28 of the pipe clamping device 1 according to one embodiment of the present invention, FIG. 6 (a) is a front view, and FIG. 6 (b) is a side view. FIG. 7 is a view showing a second gauge of the clearance gauge 28 of the pipe clamping device 1 according to one embodiment of the present invention, FIG. 7 (a) is a front view, and FIG. 7 (b) is a side view.

As shown in FIG. 3 and FIG. 4, the clearance gauge 28 includes a gripping portion 30 gripped by an operator, a first gauge 32 as a flat clearance gauge member fixed to the gripping portion 30, and an additional gauge member. As a second gauge 34.
As shown in FIG. 5, the grip portion 30 is a plate material having an L-shaped cross-sectional shape, and through holes 30 a are formed in the vicinity of both ends in the longitudinal direction when viewed from the front.
Further, as shown in FIG. 6, the first gauge 32 is a flat plate having a U-shaped planar shape, and a through hole 32b is formed in the vicinity of the ends of both U-shaped arms 32a. The plate thickness t ₁ of the first gauge 32 is 2 mm, for example.
As shown in FIG. 7, the second gauge 34 is a flat plate having a U-shaped planar shape, and a through hole 34b is formed in the vicinity of the ends of both U-shaped arms 34a. The plate thickness t ₂ of the second gauge 34 is 2 mm, for example.
The distances between the through holes 30a, 32b, and 34b in the grip portion 30, the first gauge 32, and the second gauge 34 are the same, and the grip portion 30, the first gauge 32, and the second gauge 34 are connected to each other. When stacked, a hole penetrating the grip part 30, the first gauge 32, and the second gauge 34 is formed.

As shown in FIG. 3, the distance between the both arms 32 a of the first gauge 32 is formed to be smaller than the outer diameter of the holding member 16. Between the holding surface 16 a of the holding member 16 and the adjusting screw 22, a slit (not shown) is formed on the side surface of the notch 16 b of the holding member 16 along the radial direction of the pipe 2 in the clamped state. Both arm portions 32a of the first gauge 32 are inserted into the slits. Further, the distance between both arm portions 34 a of the second gauge 34 is formed to be larger than the outer diameter of the holding member 16.
When the clearance gauge 28 is attached to the holding member 16 of the bridging member 10, first, the second gauge 34 is attached to the longitudinal direction of the holding member 16 so that the holding member 16 is positioned between both arm portions 34 a of the second gauge 34. Next, the arms 32a of the first gauge 32 are inserted into the slits on the side surface of the holding member 16 from below. Next, alignment is performed so that the through holes 30a, 32b, and 34b of the grip portion 30, the first gauge 32, and the second gauge 34 overlap each other, and a screw 36 is inserted into the through holes 30a, 32b, and 34b. And fixed with a nut 38. In this way, the first gauge 32 and the second gauge 34 are fixed in a state of being overlapped with each other by fastening the grip portion 30, the first gauge 32, and the second gauge 34 together with the screw 36 and the nut 38. The
The clearance gauge 28 attached to the holding member 16 of the bridging member 10 in this way is arranged in the radial direction of the pipe 2 in a state of being sandwiched along the slit on the side surface of the holding member 16 (that is, the longitudinal axis of the pipe 2). It is possible to move along the direction orthogonal to

  As shown in FIGS. 3 and 4, each clearance gauge 28 attached to each of the holding member 18 of the first holding arm 4 and the holding member 20 of the second holding arm 6 also includes the bridging member 10. Similar to the clearance gauge 28, the grip portion 30, the first gauge 32, and the second gauge 34 are provided. It is possible to move along.

Next, with reference to FIG. 1 thru | or FIG. 9, operation | movement (action) of the piping clamping apparatus 1 of this embodiment is demonstrated.
FIG. 8 is a front view showing a state in which the pipe clamping device 1 according to one embodiment of the present invention clamps the pipe 2, and FIG. 9 is welded by using the pipe clamping device 1 according to one embodiment of the present invention. It is a side view which shows the state which clamped two piping 2 which is.

  First, the operator rotates the shaft member 14 about the central axis A1 to raise the shaft member 14 and the male screw 12 thereof. As a result, the bridging member 10 fixed to the lower end of the shaft member 14 rises together with the shaft member 14, so that the ends on both sides of the bridging member 10 are formed in the guide grooves 4 b and 6 b of the holding arms 4 and 6. It rises along, and the space | interval of both the clamping arms 4 and 6 becomes large.

  Next, after the interval between both of the holding arms 4 and 6 is expanded to a size in which the pipe 2 to be held can be inserted, the pipe 2a on one side is connected to the holding arms 4 and 6 and the bridging member 10 of the pipe holding device 1. Is inserted from the rear side of the pipe clamping device 1 into the area surrounded by. At this time, the upper end portion of the pipe 2a is moved along the holding surface 16a of the holding member 16 of the bridging member 10, and the front end portion of the pipe 2a is below the front end of the notch 16b of the holding member 16 of the bridging member 10. To move.

  Then, the adjusting screw 22 of the holding member 16 of the bridging member 10 is rotated around its central axis until the lower end of the adjusting screw 22 contacts the upper surface of the pipe 2a. If necessary, the adjustment screws 24 and 26 of the holding members 18 and 20 of the holding arms 4 and 6 are also adjusted so as to contact the outer surface of the pipe 2a.

  Next, the entire pipe clamping device 1 is moved to the front side (left side in FIG. 9) with respect to the one side piping 2a, and the other side piping 2b is inserted from the front side to the rear side of the pipe clamping device 1. . At this time, as shown in FIGS. 8 and 9, the bridging member 10 is attached to the holding member 16, the holding member 18 of the first holding arm 4, and the holding member 20 of the second holding arm 6. Each clearance gauge 28 is moved toward the inside in the radial direction of the pipe 2a and the pipe 2b, and the tip of each clearance gauge 28 is positioned inside the outer periphery of the pipe 2a and the pipe 2b.

Then, the other side pipe 2b is inserted from the front side of the pipe clamping device 1 so as to abut against the front side surface of each clearance gauge 28. The pipes 2a and 2b to be connected are centered by adjusting and fixing the pipes 2b on the other side with the adjusting screws 22, 24 and 26 of the holding members 16, 18, and 20, respectively. At this time, the route interval between the pipe 2a on one side and the pipe 2b on the other side is the thickness of the clearance gauge 28, that is, the total value of the thicknesses t ₁ and t ₂ of the first gauge 32 and the second gauge 34. (4 mm in this embodiment).

  When the route interval between the one side pipe 2a and the other side pipe 2b is set to 0 mm, the holding member 16 of the bridging member 10, the holding member 18 of the first holding arm 4, and the second holding pin Each clearance gauge 28 attached to each of the holding members 20 of the arm 6 is moved outward in the radial direction of the pipe 2a and the pipe 2b, and the tip of each clearance gauge 28 is moved from the outer periphery of the pipe 2a and the pipe 2b. Locate outside. In this state, the other pipe 2b is inserted from the front side of the pipe clamping device 1 so as to abut against the front end of the pipe 2a.

Further, when the route interval between the pipe 2a on the one side and the pipe 2b on the other side is 2 mm, the pipe 2b on the other side is connected to the pipe with the second gauge 34 removed from each clearance gauge 28. The clamping device 1 is inserted so as to abut on the front surface of each clearance gauge 28 from the front side. At this time, the route interval between the pipe 2a on one side and the pipe 2b on the other side is the plate thickness of the clearance gauge 28, that is, the plate thickness t ₁ of the first gauge 32 (2 mm in this embodiment). .

In the above-described embodiment, the first gauge 32 and the second gauge 34 have been described as having a plate thickness of 2 mm. However, the plate thickness may be different from this. In the above-described embodiment, it has been described that the clearance gauge 28 includes two gauges of the first gauge 32 and the second gauge 34. However, the clearance gauge 28 may include three or more gauges (for example, 1 The first gauge 32 and two or more second gauges 34 are stacked to form the clearance gauge 28).
In the above-described embodiment, the clearance gauge 28 has been described as including the grip portion 30, the first gauge 32, and the second gauge 34. However, the grip portion 30 may be omitted.
In the above-described embodiment, it has been described that the first gauge 32 and the second gauge 34 are U-shaped flat plates. However, the clearance gauge 28 can be inserted and removed between the two pipes 2a and 2b. If it is a simple shape, you may form the 1st gauge 32 and the 2nd gauge 34 in other planar shapes different from a U-shape.
In the embodiment described above, the clearance gauges 28 are provided on each of the holding member 16 of the bridging member 10, the holding member 18 of the first holding arm 4, and the holding member 20 of the second holding arm 6. However, the clearance gauge 28 may be provided at a position different from the holding members 16, 18, and 20 as long as the clearance gauge 28 can be inserted and removed between the two pipes 2 a and 2 b (for example, And attached to the side surfaces of the first clamping arm 4 and the second clamping arm 6 through appropriate brackets, etc.).

  Next, the effect of the piping clamping apparatus 1 by embodiment of this invention mentioned above is demonstrated.

  First, according to the above-described pipe clamping device 1 according to the embodiment of the present invention, the first clamping arm 4 and the second clamping arm 6 that hold the peripheral surface of the pipe 2 from different sides include two pipes 2a, Since the plate-like first gauge 32 extending between the end faces of the two pipes 2a and 2b is provided in a direction substantially perpendicular to the longitudinal axis of 2b, the two pipes 2a and 2b are first connected to each other. The first gauge extends between the end faces of the two pipes 2a and 2b at the interval between the two pipes 2a and 2b when the holding arm 4 and the second holding arm 6 hold and connect them. The thickness can be controlled to 32. Thereby, when centering two piping 2a, 2b, the space | interval of the end surfaces of piping 2a, 2b can be managed correctly. Further, by adjusting the thickness of the first gauge 32 extending between the end faces of the two pipes 2a and 2b, the interval between the pipes 2a and 2b can be easily managed to a desired value.

  In addition, by inserting and removing the first gauge 32 between the two pipes 2a and 2b in the radial direction of the pipes 2a and 2b, the distance between the two pipes 2a and 2b is set to the plate thickness of the first gauge 32. The pipes 2a and 2b can be directly brought into contact with each other, and the interval between the pipes 2a and 2b can be more easily managed.

  Further, since the first gauge 32 is provided between the holding surfaces 16a, 18a, 20a of the holding members 16, 18, 20 and the adjusting screws 22, 24, 26, the first gauge 32 is connected to two pipes. It can arrange | position easily between the end surfaces of 2a, 2b.

  Further, since the plate-like second gauge 34 is overlapped with the first gauge 32 and extends between the end faces of the two pipes 2a and 2b, the thickness of the second gauge 34 overlapped with the first gauge 32 By adjusting the number of sheets, the interval between the pipes 2a and 2b can be more easily managed to a desired value.

  Further, one or a plurality of predetermined plate thicknesses substantially perpendicular to the longitudinal axis of the two pipes 2a and 2b are provided on the lower part of the first holding arm 4 and the lower part of the second holding arm 6, respectively. Since the clearance gauge 28 provided with the gauges 32 and 34 is provided so as to be insertable / removable between the two pipes 2a and 2b, the two pipes 2a and 2b are connected to each other by the first clamping arm 4 and the second When the two holding arms 6 hold and connect, the distance between the two pipes 2a and 2b should be managed by the thickness of the clearance gauge 28 inserted between the two pipes 2a and 2b. Can do. Accordingly, when the two pipes 2a and 2b are centered, the clamped pipes 2a and 2b can be easily centered, and the distance between the pipes 2a and 2b can be accurately managed. Can do. Further, by adjusting the thickness and number of the gauges 32 and 34 provided in the clearance gauge 28 inserted between the two pipes 2a and 2b, the distance between the pipes 2a and 2b can be easily set to a desired value. Can be managed. Furthermore, the piping 2a and 2b can also be directly contacted by extracting the clearance gauge 28 from between the two piping 2a and 2b.

  Further, according to the pipe clamping device 1 according to the present embodiment, the two pipes 2a and 2b are provided at the center lower part of the bridging member 10, the lower part of the first clamping arm 4, and the lower part of the second clamping arm 6, respectively. Since a clearance gauge 28 substantially perpendicular to the longitudinal axis of the pipe 2a and 2b is provided so as to be insertable / removable, the pipes 2a, 2a, 2b are provided at three locations along the circumference of the pipes 2a, 2b. The interval between 2b can be managed by the thickness of the clearance gauge 28, and the interval between the pipes 2a and 2b can be managed more accurately.

DESCRIPTION OF SYMBOLS 1 Piping clamping apparatus 2 Piping 2a One side piping 2b The other side piping 4 1st clamping arm 4a Upper end part of 1st clamping arm 4b Guide groove of 1st clamping arm 6 2nd clamping arm 6a 2nd Upper end portion of holding arm 6b Guide groove of second holding arm 8 Support portion 10 Bridging member 12 Male screw 14 Shaft member 16 Holding member (holding portion)
16a Holding surface 16b Notch portion 18 Holding member (holding portion)
18a Holding surface 18b Notch portion 20 Holding member (holding portion)
20a Holding surface 20b Notch portion 22 Adjustment screw 24 Adjustment screw 26 Adjustment screw 28 Clearance gauge 30 Grip portion 30a Through hole 32 First gauge 32a Arm portion 32b Through hole 34 Second gauge 34a Arm portion 34b Through hole 36 Screw 38 Nut A1 Center axis in the longitudinal direction of the shaft member

Claims (6)

A pipe clamping device for clamping a pipe to center two pipes to be connected to each other,
It has a plurality of clamping parts that hold the peripheral surface of the pipe from different sides,
The clamping portion is in contact with the peripheral surface of the two pipes, and centering means for centering the two pipes is substantially perpendicular to the longitudinal axis of the two pipes. A pipe clamping apparatus comprising a plate-shaped gap gauge member extending in a direction between the end faces of the two pipes.   The pipe clamping apparatus according to claim 1, wherein the clearance gauge member is provided between the two pipes so as to be insertable / removable in a radial direction of the pipes.   The centering means includes a first contact portion that contacts the peripheral surface of one of the two pipes, and a second contact that contacts the peripheral surface of the other of the two pipes. The clearance gauge member is provided between the first contact portion and the second contact portion of the centering means. Pipe clamping device.   The pipe clamping device according to any one of claims 1 to 3, further comprising a plate-like additional gauge member that is overlapped with the gap gauge member and extends between the end faces of the two pipes together with the gap gauge member. . A pipe clamping device for clamping a pipe to center two pipes to be connected to each other,
A first clamping arm that extends in a substantially vertical direction and holds the peripheral surface of the pipe from one side;
A second clamping arm that extends in a substantially vertical direction and holds the peripheral surface of the pipe from the other side;
A support part that rotatably supports each upper end part of the first holding arm and the second holding arm;
One end portion is provided movably along the first holding arm, and the other end portion is provided movably along the second holding arm. A bridging member that opens and closes the first clamping arm and the second clamping arm;
A shaft member formed with a male screw,
The lower end of the shaft member is fixed to the bridging member, and the male screw can be screwed into the support portion so that the bridging member moves up and down by rotating the shaft member around the longitudinal axis. Yes,
Each of the lower part of the first holding arm and the lower part of the second holding arm has one or a plurality of plate members having a predetermined plate thickness substantially orthogonal to the longitudinal axis of the two pipes. Is provided so that it can be inserted and removed between the two pipes.   The first clamping arm, the second clamping arm, and the bridging member are formed symmetrically with respect to a vertical center axis, and a longitudinal direction of the two pipes is provided at a lower center portion of the bridging member. The pipe clamping apparatus according to claim 5, wherein one or a plurality of the plate members having a predetermined plate thickness substantially orthogonal to the axis are provided so as to be insertable / removable between the two pipes.

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