JP2015009305A - Piping holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping holding device for holding piping in order to perform centering of two pipes.SOLUTION: A piping holding device 1 of the present invention includes: a first holding arm 4; a second holding arm 6; a support part 8 for rotatably supporting the respective upper end parts of these holding arms; a bridge member 10 one end of which is provided movably along the first holding arm, the other end of which is provided movably along the second holding arm, and which opens/closes the first holding arm and the second holding arm by moving vertically with respect to the support part; and a shaft member 14 where a male screw 12 is formed. A lower end of the shaft member is fixed to the bridge member, and the male screw can be screwed into the support part so that rotating the shaft member around an axis A1 in a longitudinal direction moves the bridge member vertically. The support part is provided with a switching unit 16 for switching the states between a screwed state where the shaft member and the support part are screwed together, and a screwing release state where the screwing is released.

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 that are connected to each other, it is generally known that the connection part between two pipes is clamped and fixed from both sides by two clamping arms. Yes. 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. .

  However, when the size of piping handled for each operation is significantly different, it is necessary to set the movement amount of the clamping arms in a short time, and the feed screw pitch and lead amount are set large, or the feed screw Although the structure etc. which provided the drive means etc. which rotate the rotation around the axis | shaft of high speed etc. are assumed, there also exists a problem that the structure of an apparatus becomes complicated correspondingly. Moreover, although it is an important issue to pinch the pipe in a short time with a simple structure and efficiently center it according to the dimensions of the pipe, it is a publicly known public use that has solved such a problem. No technology or prior art documents exist yet.

  Therefore, the present invention has been made to solve such a conventional problem, and when centering two pipes, it can be quickly held according to the size of the pipes. An object of the present invention is to provide a pipe clamping device that can easily center pipes that have been sandwiched and that is easy to use with a simple structure.

In order to achieve the above-mentioned object, the present invention is a pipe clamping device that clamps a pipe for centering two pipes, and extends substantially in the vertical direction. A first holding arm that is held from the side, a second holding arm that extends substantially vertically and holds the peripheral surface of the pipe from the other side, the first holding arm and the second holding pin A support portion that rotatably supports each upper end portion of the arm, and one end portion are provided to be movable along the first holding arm, and the other end portion is movable along the second holding arm. A bridging member that opens and closes the first clamping arm and the second clamping arm by moving up and down relative to the support part, and a shaft member on which a male screw is formed, The lower end of the shaft member is fixed to the bridging member, and the shaft portion The male screw can be screwed to the support portion so that the bridging member moves up and down by rotating the shaft around the longitudinal axis, and the support portion is screwed with the shaft member. A switching means for switching between a screwed state and a screwed released state in which the screwing is released is provided.
In the present invention configured as described above, the support portion is provided with a switching unit that switches between a screwed state in which the shaft member is screwed and a screwed released state in which the screw is released. Thus, when this switching means is switched to the screwed release state, the shaft member and the bridging member are moved up and down with a large movement amount in a short time relative to the support portion compared to the case where the switching means is switched to the screwed state. Since the piping can be clamped by quickly adjusting the opening and closing of the first clamping arm and the second clamping arm within a large range, it is easy to use with a simple structure. On the other hand, when the switching means is switched to the screwed state, the bridging member can be moved up and down with a small amount of movement with respect to the support part while rotating the shaft member around the axis. And the opening / closing of the first clamping arm and the second clamping arm can be finely adjusted. In addition, when the two pipes are held and connected by the first holding arm, the second holding arm, and the bridging member, one pipe and the other pipe can be reliably held and the pipe It is possible to easily center each other.

In the present invention, it is preferable that the switching means includes a female screw that is formed with a through hole extending through the shaft member and that can be screwed with the male screw of the shaft member on at least a part of the inner peripheral surface of the through hole. The formed moving member and the moving member are moved between a screwing position where the female screw is screwed to the male screw and a screwing releasing position where the screwing between the female screw and the male screw is released. As described above, an operation unit for the user to operate is provided.
In the present invention configured as described above, when the moving member is operated to the screwing release position by the operation unit, the moving member moves in a direction to release the screwing with the shaft member that penetrates the through hole. Therefore, the shaft member and the bridging member can be moved up and down with a large movement amount in a short time with respect to the support portion. Therefore, since the opening / closing of the first clamping arm and the second clamping arm can be adjusted quickly within a large range, it is easy to use. On the other hand, when the moving member is operated to the screwing position by the operation unit, the moving member and the shaft member penetrating the through hole are screwed together, so that the bridging member is rotated while rotating the shaft member around the axis. Can be moved up and down with a small amount of movement with respect to the support portion. Therefore, it is possible to finely adjust the relative position between the support portion and the bridging member and the opening / closing of the first and second clamping arms. Further, since an internal thread that can be screwed with the male screw of the shaft member is formed on at least a part of the inner peripheral surface of the through hole of the moving member, the internal thread of the moving member and the male screw of the shaft member are in a screwed state or screwed together. It can be easily switched to the released state.

In the present invention, preferably, the switching means further includes a biasing member for biasing the moving member to the screwing position, or a biasing member for biasing the moving member to the screwing release position, and the operation unit. And a cam mechanism that operates to move the moving member between the screwing position and the screwing release position against the biasing force of the biasing member.
In the present invention configured as described above, the cam mechanism that operates to move the moving member between the screwing position and the screwing release position against the biasing force of the biasing member by the operation of the operation unit. Thus, the moving member can be easily set to the screwing position or the screwing releasing position, which is easy to use.

In the present invention, preferably, the cross section of the through hole of the moving member is substantially oval, and the inner circumferential surface of the through hole of the oval cross section is substantially half facing the major axis direction. Two arc-shaped curved portions are provided, and the female screw is formed in one of the curved portions.
In the present invention configured as described above, the inner peripheral surface of the through-hole having a substantially oval cross section of the moving member includes two substantially semicircular arc-shaped curved portions facing in the major axis direction. Since one of these curved portions is formed with a female screw, the female screw of the moving member and the male screw of the shaft member can be easily switched to the screwed state or the screwed state.

In the present invention, preferably, the operation portion includes an operation shaft portion arranged to extend substantially parallel to the shaft member, and the cam mechanism operates when the operation portion is operated to the screwing position. The operating shaft rotates in a predetermined direction around an axis that is eccentric from the central axis, thereby pressing the moving member to lock the internal thread of the through hole to the external thread of the shaft, and When operated to the screw release position, the operating shaft rotates about the eccentric axis in a direction opposite to the predetermined direction to release the pressing force to the moving member, and the through hole The screwing of the female screw and the male screw of the shaft member is released.
In the present invention configured as described above, the cam mechanism of the switching means simply presses the moving member to rotate the operating shaft portion of the operating portion around the axis in a predetermined direction or in the opposite direction, thereby pressing the moving member. Can be locked to the male screw of the shaft member, or the pressing force on the moving member can be released to release the threaded engagement between the female screw of the through hole and the male screw of the shaft member. The member can be easily set at the screwing position or the screwing releasing position, and is easy to use.

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 vertical center axis, and the lower center portion of the bridging member Each of the lower part of the first clamping arm and the lower part of the second clamping arm is provided with a holding part that can contact the pipe, and these holding parts are connected to the pipe at three points. Hold.
In the present invention configured as above, the support portion, the first clamping arm, the second clamping arm, and the bridging member are formed symmetrically with respect to the vertical center axis, and the lower center portion of the bridging member, Since the pipes can be held at three points by the holding portions provided at the lower part of the first holding arm and the lower part of the second holding arm, the pipe is reliably held in a stable state. be able to.

In this invention, Preferably, each holding part of the said bridge | crosslinking member, the said 1st clamping arm, and the said 2nd clamping arm is a holding surface engaged with the surrounding surface of piping of the state hold | maintained by these holding parts. And a notch portion that is notched toward the outside in the radial direction of the pipe with respect to the holding surface, and the diameter of the pipe in a sandwiched state on the surface facing the pipe of the notch portion An adjustment screw is provided that can come into contact with the pipe by moving back and forth in the direction.
In the present invention configured as described above, the holding surfaces of the holding portions of the bridging member, the first holding arm, and the second holding arm engage with the peripheral surface of the pipe to reliably and stably hold the holding surface. be able to. Further, even when there is a dimensional error due to variation in the size of the cross section of the pipe held by these holding surfaces or deformation, the adjustment screw provided in the notch portion of each holding portion is moved forward and backward. Thus, it can be adjusted and brought into contact with the pipe, and can be reliably and stably held. Furthermore, for example, when two pipes are held and connected by the first holding arm, the second holding arm, and the holding member of the bridging member, the connecting part of one pipe and the connecting part of the other pipe are connected. Even if there is an error in the dimensions of the pipe, the adjustment screws of the notch portions of the holding portions of the bridging member, the first holding arm and the second holding arm are adjusted so that the connecting portions of the pipes are securely connected to each other. And fine adjustment of the centering of the pipes can be easily performed.

In the present invention, preferably, the adjusting screw of the notch portion of the holding portion of the bridging member and the operation shaft portion of the operation portion of the switching means are disposed in the same direction with respect to the shaft member.
In the present invention configured as described above, the adjustment screw of the notch portion of the holding portion of the bridging member and the operation shaft portion of the operation portion of the switching means are disposed in the same direction with respect to the shaft member. The shaft member does not interfere when adjusting the adjustment screw of the notch portion of the holding portion of the bridging member or the operation shaft portion of the operation portion, so that the operation is easy and user-friendly.

  According to the pipe clamping device of the present invention, when centering two pipes, the pipes can be quickly clamped according to the size of the pipes, and the clamped pipes can be easily centered. It is easy to use with a simple structure.

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. FIG. 3 is a plan cross-sectional view showing a screw release state of the pipe clamping device according to the embodiment of the present invention viewed along line III-III in FIG. 1. It is a partial expanded side surface sectional view which shows the screwing release state of the switching apparatus of the piping clamping apparatus by one Embodiment of this invention. It is a top view which shows the moving member of the switching apparatus of the piping clamping apparatus by one Embodiment of this invention. It is sectional drawing seen along line VI-VI of FIG. It is a partial expanded sectional view which shows the screwing release state of the switching apparatus of the piping clamping apparatus by one Embodiment of this invention shown in FIG. It is a plane sectional view showing the screwing state of the piping clamping device by one embodiment of the present invention seen along line III-III of Drawing 1. It is a partial expanded side surface sectional view which shows the screwing state of the switching apparatus of the piping clamping apparatus by one Embodiment of this invention. It is a partial expanded sectional view which shows the screwing state of the switching apparatus of the piping clamping apparatus by one Embodiment of this invention shown in FIG. It is a front view which shows operation | movement of the piping clamping apparatus by one Embodiment of this invention. It is the schematic which shows the state which inserted one piping in the piping clamping apparatus, when connecting two piping using the piping clamping apparatus by one Embodiment of this invention. When connecting two piping using the piping clamping apparatus by one Embodiment of this invention, after inserting one piping into a piping clamping apparatus, it is the schematic which shows the state fixed with the adjustment screw. When connecting two pipes using a pipe clamping device according to an embodiment of the present invention, after inserting one pipe into the pipe clamping apparatus and fixing with an adjusting screw, the other pipe is inserted and It is the schematic which shows the state connected to this piping.

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 vertically in the first clamping arm 4 that holds the circumferential surface of the pipe 2 from one side. And a second clamping arm 6 held from the 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. In addition, a switching device 16 that switches between a screwed state in which the shaft member 14 is screwed with the male screw 12 and a screwed released state in which the screwing is released is provided in the support portion 8.

Next, the details of the switching device 16 will be described with reference to FIGS.
FIG. 3 is a plan cross-sectional view showing the unscrewing state of the pipe clamping device according to the embodiment of the present invention viewed along line III-III in FIG. FIG. 4 is a partially enlarged side cross-sectional view showing a screwing release state of the switching device of the pipe clamping device according to one embodiment of the present invention.
As shown in FIG. 3 and FIG. 4, the switching device 16 includes a moving member 20 in which a through hole 18 extending through the shaft member 14 extending in the vertical direction is formed, and a compression attached to the rear side of the moving member 20. A coil spring 22 and a switching operation unit 24 for the user to operate the movement of the moving member 20 in the front-rear direction are provided.

FIG. 5 is a plan view showing a moving member of the switching device of the pipe clamping device according to one embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along line VI-VI in FIG.
As shown in FIG. 5, the cross section of the through hole 18 of the moving member 20 is substantially oval in the longitudinal direction, and is opposed to the long axis direction on the inner peripheral surface of the through hole 18 of this oval cross section. On the front side and the rear side, a substantially semicircular arc-shaped front curved portion 18a and a rear curved portion 18b are respectively formed.
Furthermore, a female screw 26 that can be screwed with the male screw 12 of the shaft member 14 is partially formed in the front curved portion 18 a of the through hole 18 of the moving member 20, and the front curved portion on the inner peripheral surface of the through hole 18. About the part other than 18a, the internal thread 26 is not provided, but it is a surface without an unevenness | corrugation.

Next, FIG. 7 is a partially enlarged cross-sectional view showing a screw release state of the switching device of the pipe clamping device according to the embodiment of the present invention shown in FIG.
As shown in FIGS. 3, 4, and 7, the compression coil spring 22 is always compressed in the casing 28 inside the support portion 8, thereby constantly urging the moving member 20 forward. Yes.
As shown in FIGS. 3, 4, and 7, the switching operation portion 24 includes an operation shaft portion 30 that is arranged to extend in the vertical direction substantially parallel to the shaft member 14. A portion of the operation shaft 30 that faces the front surface 20a of the moving member 20 can be brought into contact with the front surface 20a of the moving member 20 by rotating the operation shaft 30 about a central axis A2 extending in the vertical direction. A cam shaft portion 32 is provided.

  As shown in FIG. 7, the center axis A3 of the cam shaft portion 32 is eccentric to the front side with respect to the center axis A2 of the operation shaft portion 30, and the operation shaft portion 30 is moved to the center axis A2 by operating the switching operation portion 24. When rotating around, the cam shaft portion 32 rotates around the central axis A <b> 2 of the operation shaft portion 30 and can come into contact with the front surface 20 of the moving member 20.

  Here, in the switching device 16 in the unscrewed state shown in FIGS. 3, 4, and 7, the operation lever 24 a of the switching operation portion 24 is directed forward, and the cam shaft portion 32 of the operation shaft portion 30. Is not in contact with the front surface 20 a of the moving member 20. At this time, the moving member 20 is pressed forward by the urging force of the compression coil spring 22, and the screwed engagement between the female screw 26 of the through hole 18 of the moving member 20 and the male screw 12 of the shaft member 14 (hereinafter referred to as the screw member 20) is released. "Screw release position").

Next, FIG. 8 is a plan sectional view showing a threaded state of the pipe clamping device according to one embodiment of the present invention as seen along line III-III in FIG. 1, and FIG. 9 is one embodiment of the present invention. FIG. 10 is a partial enlarged side cross-sectional view showing a screwed state of the switching device of the pipe clamping device according to the embodiment, and FIG. 10 is a portion showing the screwed state of the switching device of the pipe clamping device according to one embodiment of the present invention shown in FIG. It is an expanded sectional view.
As shown in FIGS. 8 to 10, in the switching device 16 in the screwed state, the operation lever 24 a of the switching operation portion 24 is directed obliquely rearward, and the cam shaft portion 32 of the operation shaft portion 30 is illustrated in FIG. 10 is rotated from the position not in contact with the front surface 20a of the moving member 20 shown in FIG. 7 around the central axis A2 of the operation shaft portion 30 which is eccentric with respect to the central axis A3 of the cam shaft portion 32, and the movement shown in FIG. The member 20 is in contact with the front surface 20a and pressed backward. At this time, the moving member 20 is pressed by the cam shaft portion 32 against the urging force of the compression coil spring 22 and moves rearward, and the female screw 26 of the through hole 18 of the moving member 20 is moved to the male screw 12 of the shaft member 14. Is engaged at a position (hereinafter referred to as “screwing position”).

  That is, as shown in FIGS. 3, 4, and 7 to 10, the cam shaft portion 32 of the operation shaft portion 30 of the switching operation portion 24 of the switching device 16 moves the moving member 20 by operating the switching operation portion 24. A cam mechanism that operates to move between a screw release position (see FIGS. 3, 4, and 7) and a screw position (see FIGS. 8 to 10) against the biasing force of the compression coil spring 22. It has become.

  Again, as shown in FIGS. 1 to 4, the support portion 8, the first clamping arm 4, the second clamping arm and the bridging member 10 are formed symmetrically with respect to the vertical center axis A <b> 1. On the lower part of the center of the member 10, the lower part of the first holding arm 4, and the lower part of the second holding arm 6, substantially cylindrical holding members 34, 36, 38 extending in the axial direction of the pipe 2 are connected to the pipe 2. These holding members 34, 36, and 38 hold the pipe 2 at three points.

  As shown in FIGS. 1 and 4, the holding member 34 of the bridging member 10 engages with the peripheral surface of the pipe 20 in a state of being sandwiched between the first sandwiching arm 4 and the second sandwiching arm 6. A holding surface 34a and a notch 34b cut out radially outward of the pipe 20 with respect to the holding surface 34a are formed, and a surface B facing the pipe 2 in the notch 34b An adjustment screw 40 is provided that can come into contact with the pipe 2 by moving forward and backward in the radial direction of the pipe 2 in the sandwiched state.

  Furthermore, as shown in FIG. 4, the adjustment screw 40 of the notch 34 b of the holding member 34 of the bridging member 10 and the operation shaft 30 of the switching operation unit 24 of the switching device 16 are in the same direction with respect to the shaft member 14. The shaft member 14 is used when adjusting the adjustment screw 40 of the notch 34b of the holding member 34 of the bridging member 10 or operating the operation shaft 30 by the operation lever 24a of the switching operation unit 24. Is not to interfere.

  Further, as shown in FIGS. 1 to 3, the holding members 36 and 38 of the first holding arm 4 and the second holding arm 6 are also held in the same manner as the holding member 34 of the bridging member 10. The holding surfaces 36a and 38a that engage with the peripheral surface of the pipe 20 and the notches 36b and 38b that are cut out radially outward of the pipe 20 with respect to the holding surfaces 36a and 38a are formed, respectively. In addition, adjustment screws 42 and 44 that can come into contact with the pipe 2 by moving forward and backward in the radial direction of the pipe 2 in the sandwiched state are provided on the surfaces of the notches 36b and 38b facing the pipe 2 respectively. It has been.

Below, with reference to FIGS. 1-14, operation | movement (action | operation) of the piping clamping apparatus 1 of this embodiment is demonstrated.
FIG. 11 is a front view showing the operation of the pipe clamping device according to one embodiment of the present invention, and FIG. 12 is used when two pipes are connected using the pipe clamping device according to one embodiment of the present invention. It is the schematic which shows the state which inserted one piping in the piping clamping apparatus.
FIG. 13 is a schematic diagram illustrating a state where one pipe is inserted into the pipe clamping device and then fixed with an adjusting screw when two pipes are connected to each other using the pipe clamping device according to the embodiment of the present invention. FIG. 14 shows a case where one pipe is inserted into the pipe clamping device and fixed with an adjusting screw when the two pipes are connected to each other using the pipe clamping device according to the embodiment of the present invention. It is the schematic which shows the state which inserted this piping and connected to one piping.

First, FIG. 11 shows the pipe clamping device 1 in a state C1 in which the large-diameter pipe 2 is clamped by the first clamping arm 4 and the second clamping arm 6 as in FIG. A state C0 sandwiching the pipe 2 'is indicated by a chain line.
For example, as shown in FIG. 11, after the state C0 in which the small-diameter pipe 2 ′ is clamped by using the pipe clamping device 1 of the present embodiment, the centering work of the pipe 2 ′ is completed, and the next work is performed. When the centering operation is performed in the state C1 in which the large-diameter pipe 2 is sandwiched, first, as shown in FIGS. 2 to 4, the user points the operation lever 24a of the switching operation unit 24 of the switching device 16 forward. Operate as follows. As a result, as shown in FIG. 7, the cam shaft portion 32 of the operation shaft portion 30 is not in contact with the front surface 20 a of the moving member 20, and the moving member 20 is pressed forward by the urging force of the compression coil spring 22. Then, it moves to the screw release position where the screw engagement between the female screw 26 of the through hole 18 of the moving member 20 and the male screw 12 of the shaft member 14 is released.
At this time, the shaft member 14 has the male screw 12 released from the threaded engagement with the female screw 26 of the through hole 18 of the moving member 20, so that the user does not rotate the shaft member 14 about the central axis A <b> 1. The shaft member 14 and its male screw 12 can be greatly raised with respect to the moving member 20 and the through hole 18 simply by pulling up. The bridging member 10 fixed to the lower end of the shaft member 14 is also raised together with the shaft member 14 so that the end portions on both sides of the bridging member 10 are guided by the guide grooves 4b and 6b of the holding arms 4 and 6, respectively. The distance between both of the holding arms 4 and 6 can be set larger as the distance increases. Therefore, when the size of the pipe 2 to be sandwiched is greatly changed, it is advantageous when the positional relationship between the pipe 2 and the sandwiching arms 4 and 6 and the bridging member 10 that sandwich the pipe 2 is moved and adjusted. .

  Next, when the distance between both the clamping arms 4 and 6 is operated to a size that allows the pipe 2 to be clamped to be inserted, as shown in FIGS. 8 to 10, the user operates the switching operation unit 24 of the switching device 16. The operation lever 24a is operated so as to be directed obliquely backward. As a result, as shown in FIG. 10, the cam shaft portion 32 of the operation shaft portion 30 is positioned relative to the central axis A3 of the cam shaft portion 32 from a position where it does not contact the front surface 20a of the moving member 20 shown in FIG. It is rotated around the center axis A2 of the eccentric operation shaft 30 and is in contact with the front surface 20a of the moving member 20 shown in FIG. At this time, the moving member 20 is pressed by the cam shaft portion 32 against the urging force of the compression coil spring 22 and moves rearward, and the female screw 26 of the through hole 18 of the moving member 20 is moved to the male screw 12 of the shaft member 14. It is latched in the screwing position currently screwed in. Further, when the shaft member 14 is rotated around the central axis A1 at this screwing position, the pitch and lead of the female screw 26 of the through hole 18 of the moving member 20 and the male screw 12 of the shaft member 14 are changed according to the rotating direction. The shaft member 14 moves in the vertical direction with respect to the moving member 20 according to the amount. However, the amount of vertical movement of the shaft member 14 and the bridging member 10 at this time is smaller than that in the case where the screwing release position is set, so the pipe 2 and the clamping arms 4 and 6 and the bridging member for clamping the pipe 2 This is advantageous when the positional relationship with 10 is finely adjusted.

  Next, as shown in FIG. 12, when two pipes are connected to each other, one side of the pipe 2 a is placed in a region surrounded by the holding arms 4 and 6 and the bridging member 10 of the pipe holding apparatus 1. When inserted from the rear side, the upper end of the pipe 2a is moved along the holding surface 34a of the holding member 34 of the bridging member 10, and the front end of the pipe 2a is moved to the front end of the notch 34b of the holding member 34 of the bridging member 10. Move to the lower part of the neighborhood.

  Then, as shown in FIG. 13, the adjustment screw 40 of the holding member 34 of the bridging member 10 is rotated about its central axis until the lower end of the adjustment screw 40 comes into contact with the upper surface of the pipe 2 a. If necessary, the adjustment screws 42 and 44 of the holding members 36 and 38 of the sandwiching arms 4 and 6 are also adjusted so as to contact the outer surface of the pipe 2a.

  Next, as shown in FIG. 14, the entire pipe clamping device 1 is moved forward with respect to the one side pipe 2 a, and the other side pipe 2 b is moved from the front side of the pipe clamping device 1 to the front end of the pipe 2 a. Insert it so that it hits the part. Then, the pipes 2a and 2b to be connected are centered by adjusting and fixing the other pipe 2b with the adjusting screws 40, 42 and 44 of the holding members 34, 36 and 38, respectively.

  According to the pipe clamping device 1 according to the embodiment of the present invention described above, the switching device 16 that switches between a screwed state in which the shaft member 14 is screwed and a screwed released state in which the screw is released is provided. By being provided in the support portion 8, when the switching device 16 is switched to the screwing release state, the shaft member 14 and the bridging member 10 are connected to the support portion 8 compared to the case where the switching device 16 is switched to the screwing state. On the other hand, it can be moved up and down with a large movement amount in a short time. As a result, since the opening and closing of the first clamping arm 4 and the second clamping arm 6 can be quickly adjusted in a large range and the pipe 2 can be clamped, it is easy to use with a simple structure. On the other hand, when the switching device 16 is switched to the screwed state, the bridging member 10 can be moved up and down with a small movement amount with respect to the support portion 8 while rotating the shaft member 14 around the central axis A1. The relative position between the support portion 8 and the bridging member 10 and the opening / closing of the first holding arm 4 and the second holding arm 6 can be finely adjusted. Further, when the two pipes 2a and 2b are held and connected by the first holding arm 4, the second holding arm 6 and the bridging member 10, one pipe 2a and the other pipe 2b are securely connected. While being able to hold | maintain, centering of piping 2a, 2b can be performed easily.

  Further, according to the pipe clamping device 1 according to the present embodiment, when the moving member 20 is operated to the screw release position by the switching operation unit 24, the moving member 20 is connected to the shaft member 14 penetrating the through hole 18. Therefore, the shaft member 14 and the bridging member 10 can be moved up and down with a large amount of movement in a short time with respect to the support portion 8. Therefore, since the opening / closing of the first clamping arm 4 and the second clamping arm 6 can be quickly adjusted within a large range, it is easy to use. On the other hand, when the moving member 20 is operated to the screwing position by the switching operation unit 24, the moving member 20 and the shaft member 14 penetrating through the through hole 18 are screwed. The bridging member 10 can be moved up and down with a small amount of movement with respect to the support portion 8 while being rotated to the right. Accordingly, it is possible to finely adjust the relative position between the support portion 8 and the bridging member 10 and the opening / closing of the first holding arm 4 and the second holding arm 6. Further, since a female screw 26 that can be screwed with the male screw 12 of the shaft member 14 is formed on a part of the inner peripheral surface of the through hole 18 of the moving member 20, the female screw 26 of the moving member 20 and the male screw 12 of the shaft member 14 are formed. Can be easily switched to the screwed state or the screwed state.

  Furthermore, according to the pipe clamping device 1 according to the present embodiment, the moving member 20 is moved between the screwing position and the screwing release position against the urging force of the compression coil spring 20 by the operation of the switching operation unit 24. The moving mechanism 20 can be easily set to the screwing position or the screwing releasing position by the cam mechanism of the cam shaft portion 32 that operates so as to be easy to use.

  Further, according to the pipe clamping device 1 according to the present embodiment, the inner circumferential surface of the through hole 18 having a substantially oval cross section of the moving member 20 has two substantially semicircular arc-shaped curves facing each other in the major axis direction. Parts 18a, 18b are provided, and one of the curved parts 18a, 18b is formed with a female thread 26 on one of the front curved parts 18a. Therefore, the female thread 26 of the moving member 20 and the male thread 12 of the shaft member 14 are provided. Can be easily switched to the screwed state or the screwed state.

  Furthermore, according to the pipe clamping device 1 according to the present embodiment, the operation shaft portion 30 of the switching operation portion 24 is moved to the center axis thereof by the cam mechanism of the cam shaft portion 32 in the operation shaft portion 30 of the switching operation portion 24 of the switching device 16. By simply rotating around A2 in a predetermined direction or in the opposite direction, the moving member 20 is pressed to lock the female screw 26 of the through hole 18 to the male screw 12 of the shaft member 14, or the pressing force to the moving member 20 is released. Thus, the screwing of the female screw 26 of the through hole 18 and the male screw 12 of the shaft member 14 can be released, so that the moving member 20 can be easily moved to the screwing position or the screwing releasing position by operating the switching operation unit 24. It is easy to use.

  Further, according to the pipe clamping device 1 according to the present embodiment, the support portion 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 A1. The pipes 2 are connected to each other at three points by the holding members 34, 36, 38 provided respectively at the lower center of the bridging member 10, the lower portion of the first holding arm 4, and the lower portion of the second holding arm 6. Since it can hold | maintain, the piping 2 can be reliably hold | maintained in the stabilized state.

  Furthermore, according to the pipe clamping device 1 according to the present embodiment, the holding surfaces 34a, 36a, 38a of the holding members 34, 36, 38 of the bridging member 10, the first clamping arm 4, and the second clamping arm 6 are: Engaging with the peripheral surface of the pipe 2 can be reliably and stably held. Further, even when there is a dimensional error due to variation in the size of the cross section of the pipe 2 held by the holding surfaces 34a, 36a, 38a or deformation, the notches of the holding members 34, 36, 38 are provided. The adjustment screws 40, 42, and 44 provided in the portions 34b, 36b, and 38b can be adjusted by advancing and retracting to be brought into contact with the pipe 2 and reliably and stably held. Further, for example, when the two pipes 2a, 2b are held and connected by the holding members 34, 36, 38 of the first holding arm 4, the second holding arm 6, and the bridging member 10, one side Even if there is a dimensional error between the connecting part of the pipe 2a and the connecting part of the other pipe 2b, the holding members 34 of the bridging member 10, the first holding arm 4 and the second holding arm 6 The adjustment screws 40, 42, 44 of the notches 34b, 36b, 38b of the 36, 38 can be adjusted to securely hold the connecting portions of the pipes 2a, 2b, and the pipes 2a, 2b can be centered. Can be easily adjusted.

  Further, according to the pipe clamping device 1 according to the present embodiment, the adjusting screw 40 of the notch 34 b of the holding member 34 of the bridging member 10 and the operation shaft portion 30 of the switching operation portion 24 of the switching device 16 are connected to the shaft member 14. When the operation of adjusting the adjustment screw 40 of the notch portion 34b of the holding member 34 of the bridging member 10 or the operation shaft portion 30 of the switching operation portion 24 is performed due to being arranged in the same direction. Since the shaft member 14 does not interfere, it is easy to operate and easy to use.

  In the pipe clamping device 1 of the present embodiment, the switching device 16 is partially formed with a female screw 26 that can be screwed with the male screw 12 of the shaft member 14 in the front curved portion 18a of the through hole 18 of the moving member 20. In the inner peripheral surface of the through hole 18, the portion other than the front curved portion 18 a has been described with respect to the form in which the female screw 26 is not provided. However, the present invention is not limited to such a form. A compression screw spring 22 always moves the moving member 20 to the rear side in a form in which a female screw is partially formed in the rear curved portion 18b of the hole 18 and a female screw is not provided for portions other than the rear curved portion 18b. It may be energized.

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 6b of the clamping arm Guide groove 8 of the second clamping arm 8 Support portion 10 Bridging member 12 Male screw 14 Shaft member 16 Switching device (switching means)
18 through-hole 18a front curved portion 18b rear curved portion 20 moving member 20a front surface of moving member 22 compression coil spring (biasing member)
24 Switching operation part (operation part)
24a Operation lever 26 Female screw 28 Casing 30 Operation shaft portion of switching operation portion 32 Cam shaft portion (cam mechanism) of operation shaft portion of switching operation portion
34 Holding member (holding part)
34a Holding surface 34b Notch 36 Holding member (holding part)
36a Holding surface 36b Notch portion 38 Holding member (holding portion)
38a Holding surface 38b Notch 40 Adjustment screw 42 Adjustment screw 44 Adjustment screw A1 Center axis in the longitudinal direction of the shaft member A2 Center axis of the operation shaft portion of the switching operation portion A3 Center of the cam shaft portion of the operation shaft portion of the switching operation portion Axis B Surface facing the notch pipe in the holding member of the bridging member C0 State of the pipe holding device that holds the small-diameter pipe C1 State of the pipe holding device that holds the large-diameter pipe

Claims (8)

A pipe clamping device for clamping a pipe to center two pipes,
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 substantially vertically and holds the peripheral surface of the pipe from the other side;
A support portion that rotatably supports each upper end portion of the first clamping arm and the second clamping 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,
The pipe holding device, wherein the support portion is provided with switching means for switching between a screwed state in which the shaft member is screwed and a screwed released state in which the screw is released. .   The switching means includes a moving member in which a through hole extending through the shaft member is formed, and a female screw that can be screwed with the male screw of the shaft member is formed on at least a part of the inner peripheral surface of the through hole. The user moves the moving member between a screwing position where the female screw is screwed with the male screw and a screwing releasing position where the screwing between the female screw and the male screw is released. The piping clamping apparatus of Claim 1 provided with the operation part for operating.   The switching means further includes a biasing member for biasing the moving member to the screwing position, or a biasing member for biasing the moving member to the screwing release position, and an operation of the operation unit. The pipe clamping device according to claim 2, further comprising: a cam mechanism that operates to move between the screwing position and the screwing release position against a biasing force of the biasing member.   The cross section of the through hole of the moving member has an approximately oval shape, and the inner peripheral surface of the through hole of the oval cross section has two substantially semicircular arc-shaped curved portions facing in the major axis direction. The piping clamping apparatus according to claim 2 or 3, wherein the female screw is formed in one of the curved portions.   The operation portion includes an operation shaft portion arranged so as to extend substantially parallel to the shaft member, and the cam mechanism is configured such that when the operation portion is operated to the screwing position, the operation shaft portion is By rotating in a predetermined direction around an axis decentered from the central axis, the moving member is pressed to lock the female screw of the through hole to the male screw of the shaft member, and the operation portion is operated to the screw release position. In this case, the operation shaft portion rotates about the eccentric axis in the direction opposite to the predetermined direction to release the pressing force to the moving member, and the internal screw of the through hole and the shaft member The piping clamping apparatus of any one of Claim 2 thru | or 4 which cancels | releases screwing with a male screw.   The support portion, the first sandwiching arm, the second sandwiching arm, and the bridging member are formed symmetrically with respect to the vertical center axis, and the central lower portion of the bridging member and the first sandwiching arm A holding portion that can contact the pipe is provided at each of the lower portion of the first holding arm and the lower portion of the second holding arm, and the holding portions hold the pipe at three points. The piping clamping apparatus according to any one of 5.   Each holding portion of the bridging member, the first holding arm, and the second holding arm has a holding surface that engages with the peripheral surface of the pipe held by these holding portions, and the holding surface. A notch portion cut out toward the outside in the radial direction of the pipe, and by moving forward and backward in the radial direction of the pipe in a state of being sandwiched on the surface of the notch portion facing the pipe The pipe clamping apparatus according to any one of claims 1 to 6, wherein an adjustment screw capable of contacting the pipe is provided.   The pipe clamping according to claim 6 or 7, wherein the adjustment screw of the notch portion of the holding portion of the bridging member and the operation shaft portion of the operation portion of the switching means are disposed in the same direction with respect to the shaft member. apparatus.

Images