JP2016000420A - Pipe groove aligning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe groove aligning apparatus capable of efficiently correcting the misalignment in a radial direction of a pipe axis, and reliably performing the centering between pipes when performing groove alignment between pipes.SOLUTION: A first structural jig 2 and a second structural jig 3 are fixed to pipes 4 and 5 opposed to each other respectively. The first structural jig 2 is fixed to the pipe 4 by a clamp 2b that connects gripping claws 2a of the first structural jig 2 by fixing jigs 2c. In the same way, the second structural jig 3 is fixed to the pipe 5 by a clamp 3b that connects gripping claws 3a of the second structural jig 3 by fixing jigs 3c. While tapered faces 6 formed on the gripping claw 2a are caused to slidably contact tapered faces 7 formed on the gripping claws 3a, the first structural jig 2 and the second structural jig 3 are brought close to each other so that the centering between the pipes 4 and 5, and the adjustment of the distance between the grooves of the pipes 4 and 5 can be easily performed.

Description

  Embodiments described herein relate generally to a pipe groove aligning device.

  In plumbing work at a construction plant, in order to obtain pipes to be installed at the construction site, pipes joined to the construction site to the extent that they are not inconvenienced at the piping plant are brought to the construction site. The ends are joined together, and the ends are joined together by welding or the like. At the construction site, in order to weld the ends of the pipes, as a preliminary step, after installing a temporary support or temporary mount that supports the pipes, the operator manually adjusts the groove position, etc. Doing work.

  As the adjustment of the groove position, a groove aligning jig is welded to the periphery of the pipe ends arranged opposite to each other along the axial direction. Then, using a jig for groove alignment, the pipes arranged opposite to each other are groove-aligned, and the ends of the pipes subjected to the groove alignment are temporarily welded and temporarily joined, The ends are joined together by main welding. Therefore, a lot of time and work man-hours are required before the groove alignment.

  As a pipe groove adjusting jig capable of easily adjusting the groove of a pipe in a short time, a jig having various fixing rings, support bars, and adjusting bars has been proposed (for example, patents). Reference 1). However, even if such a jig is used, it is difficult to center the pipe at the time of groove alignment.

  In addition, a jig for fixing a pipe and a jig by using a metal band and aligning the groove of the pipe has been proposed (for example, see Patent Document 2). However, the groove alignment mechanism using this metal band is difficult to apply at the time of pipe welding because the reliability of pipe centering and the workability at the time of temporary welding are lowered.

JP 2002-66788 A JP-A-11-226784

  In the pipe groove aligning apparatus as described in Patent Documents 1 and 2, when adjusting the pipe groove, the operability for correcting the displacement of the pipes in the radial direction between the pipes facing each other is improved. There was a problem.

  The embodiment according to the present invention has been made to solve the above-described problems, and a pipe groove aligning device that can reliably perform centering of pipes when aligning the grooves between the pipes. Is to provide.

  In the pipe groove aligning apparatus according to the embodiment of the present invention, in the pipe groove aligning apparatus that aligns the ends of two pipes, the first structural jig having a plurality of gripping claws having outwardly tapered surfaces. And a second structural jig having a plurality of gripping claws having an inwardly tapered surface that is in sliding contact with the outwardly tapered surface, and having a tilt angle substantially the same as the outwardly tapered surface. The gripping claws of the one structural jig and the gripping claws of the second structural jig are connected along the circumferential direction of the corresponding pipe, and the fixing tool fixed to the pipe is fixed to the one pipe. And a groove position adjusting tool for moving the second structural jig fixed to the other pipe with respect to the first structural jig.

  According to the embodiment of the present invention, it is possible to easily perform pipe groove alignment.

It is a perspective view which shows the groove aligning apparatus of piping. (Embodiment 1) (A) is AA sectional drawing of FIG. 1, (b) is BB sectional drawing of FIG. (Embodiment 1) It is a principal part expansion perspective view of a 1st structural jig and a 2nd structural jig. (Embodiment 1) It is a perspective view after groove alignment in the groove alignment apparatus of piping. (Embodiment 1) It is a perspective view which shows the groove aligning apparatus of piping. (Embodiment 2) (A) is CC sectional drawing of FIG. 5, (b) is DD sectional drawing of FIG. (Embodiment 2) It is a perspective view which shows the groove alignment apparatus of piping. (Embodiment 3) (A) is EE sectional drawing of FIG. 7, (b) is FF sectional drawing of FIG. (Embodiment 3) It is a perspective view which shows the groove aligning apparatus of piping. (Embodiment 4) (A) is GG sectional drawing of FIG. 9, (b) is HH sectional drawing of FIG. (Embodiment 4) It is a principal part expansion perspective view of a 1st structural jig and a 2nd structural jig. (Embodiment 5) It is a principal part expansion perspective view of a 1st structural jig and a 2nd structural jig. (Embodiment 6)

Hereinafter, a pipe groove aligning apparatus according to an embodiment of the present invention will be described with reference to the drawings.
[Embodiment 1]
Embodiment 1 will be described with reference to FIGS. FIG. 1 is a perspective view showing a pipe groove aligning device 1, and FIG. 2 is a cross-sectional view taken along the line AA and BB in FIG. Show. FIG. 3 is an enlarged perspective view of a main part of the first structural jig 2 and the second structural jig 3 in the pipe groove aligning device 1, and FIG. 4 is a view after performing pipe groove alignment. It is a perspective view which shows the groove aligning apparatus 1 of piping.

  The end portion 4a of the pipe 4 and the end portion 5a of the pipe 5 to be combined in a state in which the groove gap is secured are pre-grooved, and the end portion 4a and the end portion 5a are secured in the groove gap. In the state where the grooves are aligned together, temporary welding is performed, and finally the two pipes 4 and 5 are joined by the main welding.

(Configuration of piping groove alignment device)
As shown in FIGS. 1 to 4, the pipe groove aligning device 1 is an apparatus for aligning the end 4 a of the pipe 4 and the end 5 a of the pipe 5 in a state in which a groove gap is secured. A first structural jig 2 fixed to 4, a second structural jig 3 fixed to the pipe 5, and a groove position adjusting tool for contacting and separating the first structural jig 2 and the second structural jig 3. 10 is provided.

  The first structural jig 2 includes a plurality of gripping claws 2a, a clamp 2b that connects adjacent gripping claws 2a at equal intervals, and a fixing jig 2c that fixes the end side of each clamp 2b to the gripping claws 2a. It has. A clamp for fixing the first structural jig 2 to the pipe 4 is constituted by the clamp 2b and the fixing jig 2c.

The second structural jig 3 includes a plurality of gripping claws 3a, clamps 3b that connect adjacent gripping claws 3a at equal intervals, and a fixing jig that fixes the end side of each clamp 3b to the gripping claws 3a. 3c. A clamp for fixing the second structural jig 3 to the pipe 5 is constituted by the clamp 3b and the fixing jig 3c.
As shown in FIG. 2, the clamps 2b and 3b have an inner surface shape that is substantially concentric with the outer peripheral surfaces of the pipes 4 and 5.

  And if the edge part side of each clamp 2b is fixed between the adjacent holding claws 2a with the fixing jig 2c, the outer peripheral surface of the piping 4 can be clamped by the inner surface of each holding claw 2a. The gripping claws 2 a can be fixed to the pipe 4 by being arranged along the outer peripheral surface of the pipe 4 at equal intervals and so as to be concentric with the axis of the pipe 4.

  Similarly, with respect to each gripping claw 3a, when the end side of each clamp 3b is fixed between adjacent gripping claws 3a by the fixing jig 3c, the outer peripheral surface of the pipe 5 is clamped by the inner surface of each gripping claw 3a. be able to. The gripping claws 3 a can be fixed to the pipe 5 by being arranged along the outer peripheral surface of the pipe 5 at equal intervals and so as to be concentric with the axis of the pipe 5.

  As shown in FIG. 2, the inner surface shape of the gripping claws 2 a and the inner surface shape of the gripping claws 3 a have a circular cross-sectional shape, and the gripping claws 2 a and 3 a respectively define the outer peripheral surfaces of the pipes 4 and 5. When holding and fixing the first structural jig 2 and the second structural jig 3 to the pipes 4 and 5, the gripping claws 2 a and 3 a can come into contact with the outer peripheral surfaces of the pipes 4 and 5 in a substantially line contact state.

  With this configuration, when the gripping claws 2a and 3a are fixed to the pipes 4 and 5 by the clamps 2b and 3b, the gripping claws 2a and 3a can easily adjust the inclination of the pipes 4 and 5 in the circumferential direction. 3a can be easily connected. Moreover, even if the outer diameters of the pipes 4 and 5 change, it can be dealt with only by changing the length dimension of the clamps 2b and 3b, and is configured as a highly versatile gripping claw 2a and 3b. I can keep it.

  The gripping claw 2a is formed with a tapered surface 6 that is outward, that is, toward the outer peripheral side of the pipe 4 and whose radial position narrows inward as it goes toward the end 4a of the pipe 4. Further, the gripping claw 3a has an inward direction having substantially the same inclination angle as the tapered surface 6 of the gripping claw 2a, that is, its radial position as it goes to the inner peripheral side of the pipe 4 and toward the end 5a of the pipe 5. A tapered surface 7 extending outward is formed.

Further, a scale 9 is formed on the grip claw 2a or the grip claw 3a, and the distance between the end portions 4a and 5a of the pipes 4 and 5 can be adjusted to a predetermined distance between the grooves after the grooves are aligned.
The tapered surfaces 6 and 7 may be formed as a flat surface in the circumferential direction, or formed as a part of a conical surface that forms an arc in the circumferential direction, as long as they are configured as surfaces that can slide together. You can also keep it. Therefore, the planar shape as the tapered surfaces 6 and 7 described above in the embodiment of the present invention and the partial shape of the conical surface are also the configurations of the outward tapered surfaces in the first structural jig 2 described in the claims, And it is included as a configuration of an inwardly tapered surface in the second structural jig 3.

  FIG. 3 shows a configuration in which the scale 9 is formed at the lower end edge of the gripping claw 2a. However, the scale 9 is also formed at the lower end edge of the gripping claw 3a and grips the end 5a of the pipe 5. The attachment position of the claw 3a can also be adjusted. In this case, the gripping claw 2a can be attached to the pipe 4 at a position where the front end of the gripping claw 2a, which is a contact surface with the gripping claw 3a, protrudes from the end 4a of the pipe 4 by a predetermined length. Similarly, the gripping claw 3a can be attached to the pipe 5 at a position where the front end of the gripping claw 3a, which is a contact surface with the gripping claw 2a, is retracted from the end 5a of the pipe 5 by a predetermined length.

  As a result, as shown in FIG. 4, in the state where the contact surface of the gripping claw 2a and the contact surface of the gripping claw 3a are in contact with each other, the end 4a of the pipe 4 and the end 5a of the pipe 5 The interval can be adjusted to a predetermined gap distance.

  As shown in FIG. 3, the groove position adjusting tool 10 includes a screw rod 11 and a groove position fixing tool 12 that is screwed into the screw rod 11. For example, an annular recess groove (not shown) that is rotatably engaged with the engaging recess formed in 2a is formed. As a configuration of the engaging recess formed in the gripping claw 2a, a hole is formed along the vertical direction, and this hole is formed as a hole that is open at the top and closed at the bottom. And the slit along a vertical direction can be formed in the side which faces the holding nail | claw 3a of the said hole.

And the annular recessed groove formed in the one end part of the screw rod 11 can be inserted in this slit.
Instead of forming the annular recess groove, a spherical portion can be formed at one end of the screw rod 11 and a ball joint mechanism can be configured between the engaging hole formed in the gripping claw 2a.

  Further, the other end side of the screw rod 11 can be screwed into a screw hole formed in the gripping claw 3a, and by rotating the screw rod 11, the gripping claw 3a screwed to the screw rod 11 is removed. The gripping claws 2a arranged opposite to each other can be brought close to or separated from each other.

  Then, as shown in FIG. 3, the end 4a of the pipe 4 to which the screw rod 11 is rotated and the first structural jig 2 is fixed, and the end 5a of the pipe 5 to which the second structural jig 3 is fixed are connected. In a state where the grooves are aligned, the groove position fixing tool 12 screwed into the other end of the screw rod 11 is screwed in, so that a double consisting of the groove position fixing tool 12 and the screw hole of the gripping claw 3a is formed. The distance between the gripping claws 2a and the gripping claws 3a can be fixed by the nut effect. Further, the groove position fixture 12 has a tapered structure.

  Alternatively, a through hole into which the screw rod 11 is inserted is formed in the gripping claw 3a, and after the screw rod 11 is inserted into the through hole of the gripping claw 3a, the groove position fixing tool 12 is screwed into the screw rod 11. Accordingly, the gap between the first structural jig 2 and the second structural jig 3 can be fixed by pressing the through hole of the gripping claw 3a with the inclined surface formed in the groove position fixing tool 12. .

  As shown in FIG. 2, the illustrated example shows a configuration in which three gripping claws 2 a and three gripping claws 3 a are used, but the gripping is performed by the first structural jig 2 and the second structural jig 3. An appropriate number of gripping claws 2a and gripping claws 3a can be used according to the size of the outer diameter of the pipes 4 and 5.

(Activation of the pipe groove adjustment device)
First, using the scale 9, after the gap between the end 4a of the pipe 4 and the end 5a of the pipe 5 is adjusted, the distance between the ends 4a and 5a is adjusted so as to satisfy a predetermined gap distance. To do. Then, using the clamps 2b and 3b, the gripping claws 2a of the first structural jig 2 and the gripping claws 3a of the second structural jig 3 are arranged at equal intervals along the outer circumferential direction of the pipe 4 and the pipe 5, respectively. As shown, the fixing jigs 2c and 3c are used to temporarily tighten the pipes 4 and 5 respectively.

Next, the screw rod 11 of the groove position adjusting tool 10 is screwed into the screw hole of the gripping claw 3a, and one end of the screw rod 11 is rotatably engaged with the gripping claw 2a. Then, the gripping claws 2a and the gripping claws 3a are installed so as to be paired, and finally tightened with the fixing jigs 2c and 3c.
At this time, the gripping claws 2a and the gripping claws 3a that are paired with each other are acceptable even when the arrangement is not completely matched with the radial direction of the axes of the pipes 4 and 5.

  Next, the screw rod 11 is rotated so that the tapered surface 6 of the gripping claw 2a and the tapered surface 7 of the gripping claw 3a come into sliding contact with each other. Thereby, the groove | channel of the edge part 4a and the edge part 5a can be match | combined, aligning the piping 4 and the pipe 5 which oppose.

  Thereafter, the groove position fixing tool 12 is screwed into the screw rod 11. Then, as shown in FIG. 4, in the state where the contact surface of the gripping claw 2a and the contact surface of the gripping claw 3a are in contact with each other, the distance between the end 4a of the pipe 4 and the end 5a of the pipe 5 Can be adjusted to a predetermined distance between the grooves.

  The width of the slit formed in the engagement portion, for example, the engagement recess, for engaging one end portion of the screw rod 11 in the gripping claw 2a has some margin with the one end portion of the screw rod 11 inserted into the slit. It has a width dimension. Therefore, by screwing the groove position fixture 12 into the screw rod 11, between the first structural jig 2 and the second structural jig 3, with respect to the radial direction of the axes of the pipes 4 and 5. Even if a deviation occurs, the pipes 4 and 5 can be centered while correcting this deviation.

  In the case where a through hole for inserting the screw rod 11 is formed in the gripping claw 3a, one end of the screw rod 11 inserted into the through hole of the gripping claw 3a is engaged with the gripping claw 2a, The groove position fixing tool 12 screwed into the end is screwed in advance. Then, the distance between the first structural jig 2 and the second structural jig 3 is adjusted while the tapered surface 6 of the first structural jig 2 and the tapered surface 7 of the second structural jig 3 are in sliding contact with each other. When the distance between the end 4a of the pipe 4 and the end 5a of the pipe 5 as shown in FIG. 4 reaches a predetermined gap distance, the groove position fixing tool 12 is screwed into the groove position fixing tool 12. The position of the second structural jig 3 is fixed by the inclined surface.

  At least one of the gripping claws 2a and the gripping claws 3a can be provided with a level 13. By providing the level 13, it is possible to adjust the horizontality and gradient of the pipe for performing the groove alignment.

  In the present embodiment configured as described above, the pipes 4 and 5 can be easily centered and the distance between the grooves of the pipes 4 and 5 can be easily adjusted. In addition, after the grooves 4 and 5 are aligned, temporary welding can be performed without using an additional alignment jig. Therefore, it is possible to reduce the number of work steps from groove alignment of the pipes 4 and 5 to temporary welding.

[Embodiment 2]
Next, Embodiment 2 of the pipe groove aligning apparatus 1 according to the embodiment of the present invention will be described with reference to FIGS. 5 and 6. In addition, the same code | symbol is attached | subjected to the structure same as Embodiment 1, and the overlapping description is abbreviate | omitted.

  The configuration of the second embodiment is different from the configuration of the first embodiment in that a belt / chain structure is used as the groove position adjusting tool 10 instead of the screw rod 11 in the groove position adjusting tool 10 shown in FIGS. The body 14 is employed. One end of the belt / chain structure 14 is attached to the gripping claw 2 a of the first structural jig 2, and the other end is inserted into a through hole formed in the gripping claw 3 a of the second structural jig 3. The aperture of the through-hole formed in the gripping claw 3a has a structure with a margin compared to the outer diameter of the belt / chain structure 14 itself.

  When aligning the grooves of the pipes 4 and 5, the other ends of the belt / chain structure 14 are tightened so that the first structural jig 2 and the second structural jig 3 are connected to each other. Even if a deviation occurs with respect to the radial direction of the shaft, the pipes 4 and 5 can be centered while correcting this deviation.

(Activation of the pipe groove adjustment device)
First, using the scale 9, the groove 4 is aligned with the end 4a of the pipe 4 and the end 5a of the pipe 5, and then the distance between the ends 4a and 5a satisfies a predetermined distance between the grooves. Adjust as follows. Thereby, a groove gap having a predetermined dimension can be formed as an interval between the end portions 4a and 5a. Then, using the clamps 2b and 3b, the gripping claws 2a and the gripping claws 3a are temporarily tightened using the fixing jigs 2c and 3c so as to be equidistant along the outer circumferential direction of the respective pipes 4 and 5. .

Next, the other end of the belt / chain structure 14 is inserted into a through-hole formed in the gripping claw 3a of the second structural jig 3, and each gripping claw 2a of the first structural jig 2 and the second structural jig are inserted. 3 so that the holding claws 3a are paired with each other, the fixing jig 2c and the fixing jig 3c are finally tightened, and the first structural jig 2 and the second structural jig 3 are respectively connected to the pipe 4 5 is fixed.
At this time, the gripping claws 2a and the gripping claws 3a that are paired with each other are acceptable even if they are arranged so as not to completely match the radial direction of the axes of the pipes 4 and 5. .

  Next, the other end side of the belt / chain structure 14 is tightened so that the tapered surface 6 of the gripping claws 2a and the tapered surface 7 of the gripping claws 3a are brought into sliding contact with each other. Accordingly, the groove between the end portions 4a and 5a can be adjusted while centering between the pipes 4 and 5. Thereafter, temporary welding and main welding between the end portions 4a and 5a can be performed.

  Also in the configuration of the second embodiment, as in the case of the first embodiment, the centering of the pipes and the distance adjustment between the groove portions of the pipes can be easily performed. In addition, after the grooves 4 and 5 are aligned, temporary welding can be performed without using an additional alignment jig. Thereby, the work man-hours from the groove alignment of the pipes 4 and 5 to temporary welding can be reduced.

[Embodiment 3]
Next, Embodiment 3 of the pipe groove aligning apparatus 1 according to the embodiment of the present invention will be described with reference to FIGS. 7 and 8. In addition, the same code | symbol is attached | subjected to the structure same as Embodiment 1-2, and the overlapping description is abbreviate | omitted.

  The configuration of the third embodiment is different from the configuration of the first embodiment in that another configuration is adopted instead of the groove position adjusting tool 10 shown in FIGS. That is, as another configuration, the holding claw 2a is provided with a fixing tool 20, and the holding claw 3a is provided with a fixing tool 21. A first insertion hole 24 as a long hole along the radial direction of the pipe 4 is formed in the fixture 20, and a first hole as a long hole along the circumferential direction of the pipe 4 is formed in the fixture 21. Two insertion holes 25 are formed.

  The screw rod 11 is inserted between the first insertion hole 24 and the second insertion hole 25, and the one end side of the screw rod 11 can be moved in the radial direction of the pipe 4 by the first insertion hole 24. The other end side of the screw rod 11 can be moved in the circumferential direction of the pipe 5 by the second insertion hole 25. Then, a fastening tool 22 such as a nut is screwed to both ends of the screw rod 11, and the first structural jig 2 and the second structural jig are tightened by fastening the fastening tool 22 to the screw rod 11. 3 can be narrowed.

  Since one end of the screw rod 11 can move in the radial direction of the pipe 4 and the other end of the screw rod 11 can move in the circumferential direction of the pipe 5, the pipe ends 4 a and 5 a are connected to each other. The grooves 4 and 5 can be aligned in a state where a groove gap is secured while correcting the radial and circumferential shifts.

(Activation of the pipe groove adjustment device)
First, using the scale 9 formed on the grip claw 2a or the grip claw 3a, the end portion 4a of the pipe 4 and the end portion 5a of the pipe 5 are aligned with each other, and then the end portions 4a, 5a The interval is adjusted to satisfy a predetermined gap distance. Then, using the clamps 2b and 3b, the gripping claws 2a and the gripping claws 3a are temporarily tightened using the fixing jigs 2c and 3c so as to be equidistant along the outer circumferential direction of the respective pipes 4 and 5. .

  Next, both ends of the screw rod 11 are attached to the fixture 20 and the fixture 21, and the fastening tool 22 is screwed to the both ends of the screw rod 11. Thereafter, the clamps 2 b and 3 b are finally tightened to fix the first structural jig 2 to the pipe 4 and the second structural jig 3 to the pipe 5.

The fastening tool 22 screwed into the screw rod 11 is screwed so that the tapered surfaces 6 and 7 facing each other of the first structural jig 2 and the second structural jig 3 are brought into sliding contact with each other. Thereby, the groove | channels of the piping 4 and 5 can be match | combined, correct | amending the shift | offset | difference of the edge parts 4a and 5a of the piping 4 and 5. FIG. A predetermined gap distance can be given between the end portions 4a and 5a.
Thereafter, temporary welding and main welding can be performed.

  Also in the configuration of the third embodiment, as in the case of the first and second embodiments, the pipes 4 and 5 can be easily centered and the distance between the groove of the pipe can be easily adjusted. In addition, after the grooves 4 and 5 are aligned, temporary welding can be performed without using an additional alignment jig. Thereby, the work man-hours from the groove alignment of the pipes 4 and 5 to temporary welding can be reduced.

[Embodiment 4]
Next, Embodiment 4 of the pipe groove aligning apparatus 1 according to the embodiment of the present invention will be described with reference to FIGS. 9 and 10. In addition, the same code | symbol is attached | subjected to the structure same as Embodiment 1-3, and the overlapping description is abbreviate | omitted.

  The configuration of the fourth embodiment is different from the configurations of the first to third embodiments in that the configurations of the clamps 2b and 3b that connect between the adjacent gripping claws 2a and between the adjacent gripping claws 3a are different. That is, in the fourth embodiment, a plurality of belt holes 23 are formed in the clamps 2b and 3b along the longitudinal direction of the clamps 2b and 3b in order to adjust the distance between the gripping claws 2a and the gripping claws 3a. Yes. The belt hole 23 functions to adjust the length of the clamps 2b and 3b.

  The spacing between the gripping claws 2a and the spacing between the gripping claws 3a can be changed by changing the length dimensions of the clamps 2b and 3b. The lengths of the clamps 2b and 3b can be determined by fixing a desired belt hole among the plurality of formed belt holes 23 to the gripping claws 2a and 3a by the fixing jigs 2c and 3c.

  The first structural jig 2 and the second structural jig 3 can be easily attached to the pipes 4 and 5 having different diameters. Further, the gripping claws 2a and 3a can be fixed evenly in the circumferential direction of the pipes 4 and 5, and the grooves of the pipes 4 and 5 can be aligned in a stable state.

  Also in the configuration of the fourth embodiment, as in the case of the first to third embodiments, the pipes 4 and 5 can be easily centered and the distance between the groove of the pipe can be easily adjusted. In addition, after the grooves 4 and 5 are aligned, temporary welding can be performed without using an additional alignment jig. Thereby, the work man-hours from the groove alignment of the pipes 4 and 5 to temporary welding can be reduced.

[Embodiment 5]
Next, the configuration of the gripping claws 2a and 3a in the pipe groove aligning device 1 according to the embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as Embodiment 1-4, and the overlapping description is abbreviate | omitted.

  The configuration of the fifth embodiment is different from the configurations of the first to fourth embodiments in that the configurations of the tapered surfaces 6 and 7 in the grip claw 2a or the grip claw 3a are different. That is, in the fifth embodiment, the sliding bearing 30 is provided on the tapered surface 7 of the gripping claw 3a.

Below, although the structure which formed the bearing 30 in the taper surface 7 of the holding claw 3a is demonstrated, the bearing 30 can also be formed in the taper surface 6 of the holding claw 2a.
By providing the bearing 30, there is a deviation with respect to the radial direction of the pipes 4 and 5 between the first structural jig 2 and the second structural jig 3 when the pipes 4 and 5 are aligned. However, the sliding contact between the tapered surface 6 of the gripping claw 2a and the tapered surface 7 of the gripping claw 3a can be performed smoothly, and the radial displacement can also be corrected. As a result, the grooves 4 and 5 can be easily aligned.

  Also in the configuration of the fifth embodiment, as in the case of the first to fourth embodiments, the centering of the pipes 4 and 5 and the distance adjustment between the groove portions of the pipes can be easily performed. In addition, after the grooves 4 and 5 are aligned, temporary welding can be performed without using an additional alignment jig. Thereby, the work man-hours from the groove alignment of the pipes 4 and 5 to temporary welding can be reduced.

[Embodiment 6]
Next, the configuration of the gripping claws 2a and 3a in the pipe groove aligning device 1 according to the embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as Embodiment 1-5, and the overlapping description is abbreviate | omitted.

  The configuration of the sixth embodiment is different from the configurations of the first to fifth embodiments in that the configurations of the tapered surfaces 6 and 7 in the grip claw 2a or the grip claw 3a are different. That is, in the sixth embodiment, the guide groove 41 is formed on the tapered surface 6 of the gripping claw 2a, and the guide 40 guided by the guide groove 41 is provided on the tapered surface 7 of the gripping claw 3a.

  In the following description, the guide groove 41 is formed on the tapered surface 6 of the gripping claw 2a and the guide 40 is provided on the tapered surface 7 of the gripping claw 3a. However, the guide groove 41 is formed on the tapered surface 7 of the gripping claw 3a. The guide 40 may be formed on the tapered surface 6 of the gripping claw 2a.

  By providing the guide 40 and the guide groove 41, the pipes 4 and 5 are aligned with each other between the first structural jig 2 and the second structural jig 3 in the radial direction of the pipes 4 and 5. Even if there is misalignment, the guide 40 is guided in close contact with the guide groove 41, so that the taper surface 6 of the gripping claw 2a and the taper surface 7 of the gripping claw 3a can be smoothly slid. . Even if there is a deviation between the first structural jig 2 and the second structural jig 3 with respect to the circumferential direction of the pipes 4 and 5, the guide 40 is guided so as to be in close contact with the guide groove 41. Thus, the circumferential displacement can be corrected and the grooves 4 and 5 can be easily aligned.

  In the configuration of the sixth embodiment, as in the case of the first to fifth embodiments, the pipes 4 and 5 can be easily centered and the distance between the pipe grooves can be easily adjusted. In addition, after the grooves 4 and 5 are aligned, temporary welding can be performed without using an additional alignment jig. Thereby, the work man-hours from the groove alignment of the pipes 4 and 5 to temporary welding can be reduced.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, combinations, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Piping groove aligning device, 2 ... 1st structure jig, 2a ... Holding claw, 2b ... Clamp, 2c ... Fixing jig, 3 ... 2nd structure jig, 3a ... Holding claw, 3b ... Clamp, 3c DESCRIPTION OF SYMBOLS ... Fixing jig, 10 ... Groove position adjusting tool, 12 ... Groove position fixing tool, 13 ... Level, 14 ... Belt chain structure, 20 ... Groove axis direction fixing tool, 21 ... Groove circumferential direction Fixing tool, 22 ... clamping tool, 23 ... belt hole, 30 ... bearing, 40 ... guide, 41 ... guide groove.

Claims (9)

In a pipe groove aligning device that aligns the ends of two pipes,
A first structural jig having a plurality of gripping claws having an outwardly tapered surface;
A second structural jig having a plurality of gripping claws having an inwardly tapered surface having a substantially same inclination angle as the outwardly tapered surface and in sliding contact with the outwardly tapered surface;
Connecting each gripping claw of the first structural jig and each gripping claw of the second structural jig along the circumferential direction of the corresponding pipe, and fixing the pipe to the pipe;
A groove position adjusting tool for moving the second structural jig fixed to the other pipe with respect to the first structural jig fixed to the one pipe;
A pipe groove aligning device characterized by comprising:   2. The pipe groove aligning device according to claim 1, wherein the first structural jig or the second structural jig is provided with a level.   The pipe groove alignment apparatus according to claim 1 or 2, wherein a scale for adjusting a mounting position from a pipe end is formed on the first structural jig or the second structural jig. .   4. The clamp according to claim 1, wherein the fixture includes a clamp band that connects the gripping claws adjacent to each other along the circumferential direction of the pipe and grips the pipe. The pipe groove aligning apparatus described.   The pipe groove aligning device according to claim 4, wherein a plurality of holes for adjusting a connection length between the gripping claws are formed in the clamp band.   The bearing which slides on the other taper surface is provided in one taper surface among the said inward taper surface and the said outward taper surface, Any of Claim 1 thru | or 5 characterized by the above-mentioned. A groove aligning apparatus for piping according to crab.   A guide groove along the longitudinal direction of the pipe is formed on one of the inward taper and the outward taper surface, and the guide is guided by being inserted into the guide groove on the other taper surface. 6. A pipe groove aligning device according to claim 1, wherein a piece is formed.   The pipe groove adjusting device according to any one of claims 1 to 7, wherein the groove position adjusting tool is driven by screw driving or chain driving. The groove position adjuster is configured using a screw rod and a nut screwed into the screw rod,
A first insertion hole is formed to insert one end of the screw rod into each gripping claw of the first structural jig or each gripping claw of the second structural jig and prevent the nut from coming off,
A second insertion hole is formed to insert the other end of the screw rod into each gripping claw of the second structural jig or each gripping claw of the first structural jig and prevent the nut from coming off;
The first insertion hole is formed as a long hole along the radial direction of the pipe, and the second insertion hole is formed as a long hole along the circumferential direction of the pipe. The pipe groove aligning device according to claim 7.

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