WO2011142176A1

WO2011142176A1 - Pipe bending device

Info

Publication number: WO2011142176A1
Application number: PCT/JP2011/056504
Authority: WO
Inventors: 和彦中里; 宣明尼崎; 和広長岡; 光平蘭
Original assignee: 三桜工業株式会社
Priority date: 2010-05-14
Filing date: 2011-03-11
Publication date: 2011-11-17
Also published as: BR112012028634B1; CN102905810A; TW201201923A; JP5611333B2; JPWO2011142176A1; TWI492798B; CN102905810B

Abstract

Disclosed is a compact, low-cost manual pipe bending device configured from: a device body provided with a positioning means for positioning a pipe relative to a bending roll, and a deforming means for moving the pipe along the bending roll while pressing on the pipe relative to the bending roll to bend the pipe; and a stand which supports said device body in a prescribed position relative to the pipe. An arcuate guide is provided on top of the stand, and the device body is installed in the arcuate guide so as to move, centered at the bending position, around the pipe, and the rotation shaft is arranged so as to be axially slidable and rotatable relative to the device body frame. A rod handle is arranged on the rotation shaft; by means of said rod handle moving the rotation shaft upwards, the positioning means engages with the pipe, and the deformation means creates a bending action by rotation of the rotation shaft.

Description

Pipe bending machine

The present invention relates to a pipe bending apparatus. More specifically, the pipe is positioned with respect to the circumferential surface of the bending roll, and while the portion to be bent of the pipe is sandwiched between the bending roll and the pressure, the pressure is revolved with respect to the bending roll, thereby the bending roll. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe bending apparatus that bends and deforms a pipe along a pipe and manually bends the pipe.

The pipe is positioned with respect to the circumferential surface of the bending roll, the part to be bent is clamped by the bending roll and the pressure, the pressure is revolved with respect to the bending roll, and the pipe is bent and deformed along the bending roll. An example of a pipe bending apparatus to be used is disclosed in Japanese Patent Application Laid-Open No. 2005-52854.
In the pipe bending apparatus disclosed in this Japanese publication, as an apparatus main body, an operation plate is rotatably attached to a fixed plate, a clamp is fixed to the fixed plate, a bending roll, a pressure, Are movably supported, and a cam for determining movement paths of the bending roll and the pressure is formed on the operation plate, and the bending roll and the pressure are engaged with these cams.
In this pipe bending apparatus, the apparatus main body is installed on the frame, the pipe mounted on the frame is engaged with the apparatus main body, and the operation plate is rotated to bend the pipe. .
By the way, in the pipe bending apparatus disclosed in the above Japanese publication, bending is performed on a plane parallel to the frame, that is, a plane parallel to the fixing plate of the apparatus main body, but the apparatus main body is fixed to the frame. In order to bend in the other direction, the pipe must be rotated by a predetermined angle. Therefore, in this pipe bending apparatus, it is necessary to provide a pipe rotating mechanism and the like, and the apparatus becomes so large.

The present invention has been made in view of the above-described background art, and an object of the present invention is to provide a compact manual pipe bending apparatus.
In order to achieve the above-described object, the first pipe bending apparatus of the present invention moves along the bending roll while positioning the pipe with respect to the bending roll, while positioning the pipe against the bending roll. A pipe bending apparatus constituted by an apparatus main body provided with a deformation means for bending the pipe and a stand for supporting the apparatus main body at a predetermined position with respect to the pipe, and an arc guide is provided at an upper end of the stand. The arcuate guide is installed so that the apparatus main body moves around the pipe around the bending position, and the rotation shaft is arranged to be rotatable with respect to the frame of the apparatus main body and slidable in the axial direction. The rod handle is disposed on the rotary shaft, and the rotary shaft is moved upward by the rod handle to engage the positioning means with the pipe. Allowed, characterized in that as actuating bending the deformation means by rotating the rotating shaft.
According to the pipe bending apparatus according to the first aspect of the present invention, since the apparatus main body can move around the bending position, the bending direction of the pipe can be arbitrarily set without requiring a mechanism for rotating the pipe. In addition, since the positioning means and the deformation means can be operated by one handle operation, the apparatus can be configured simply.
Further, the second pipe bending apparatus of the present invention is characterized in that, in the first invention, the stand is disposed so as to be movable in a direction in which the apparatus main body is separated from a bending position with respect to the pipe. To do.
According to the pipe bending apparatus according to the second aspect of the present invention, in addition to the above effects, the apparatus main body can be moved away from the bending position by moving the stand, so that bending of other parts of the pipe can be performed. It does not get in the way of processing, and it is easy to check the bent part of the pipe.
The third pipe bending apparatus of the present invention is characterized in that, in the first or second invention, the stand is installed so as to be movable in a direction parallel to the axis of the pipe. .
According to the pipe bending apparatus according to the third aspect of the present invention, in addition to the above effects, the pipe bending position can be easily changed.
According to a fourth pipe bending apparatus of the present invention, in any of the first to third inventions, the bending roll is disposed so as to be movable forward and backward with respect to the pipe, and a groove cam is formed on the bottom surface. Then, a plate-like arm is fixed to the rotating shaft, a pin is erected on the upper surface of the plate-like arm, the pin is inserted into a groove cam of the bending roll, and the rotation shaft rotates with the rotation of the rotating shaft. The plate-like arm is rotated, and the bending roll is moved toward the pipe via the pin and the cam groove of the bending roll.
According to the pipe bending apparatus according to the fourth aspect of the present invention, in addition to the above effects, the bending roll can be moved toward the pipe, so that both bending rolls can be employed. Bending with high accuracy can be performed.
According to a fifth pipe bending apparatus of the present invention, in any one of the first to fourth inventions, the frame of the apparatus main body includes a portion extending in a direction perpendicular to the axis of the rotation axis. An L-shaped groove comprising a portion extending in a direction parallel to the shaft core is formed, and the rod handle is guided by the groove.
According to the pipe bending apparatus of the fifth aspect of the present invention, in addition to the above effects, the rod handle can be reliably guided in the sliding direction and the rotational direction by the groove.
The sixth pipe bending apparatus of the present invention is characterized in that, in any of the first to fourth inventions, the rotating shaft and the bar handle are linked via a toggle mechanism.
According to the pipe bending apparatus of the sixth aspect of the present invention, in addition to the above effects, the operating force of the rod handle is transmitted to the rotating shaft via the toggle mechanism, so that the operating force can be reduced.
The seventh pipe bending apparatus of the present invention is the lower end of the first link rod in which the toggle mechanism has the upper end rotatably supported by the frame of the apparatus main body according to the sixth aspect. And a lower end of a second link rod, the upper end of which is rotatably supported by the rotating shaft, and the rod handle is erected on the second link rod. It is characterized by that.
According to the pipe bending apparatus of the seventh aspect of the present invention, in addition to the above effects, the structure is simple and compact.

FIG. 1 is a perspective view conceptually showing an embodiment of a pipe bending apparatus according to the present invention.
FIG. 2 is a perspective view showing an apparatus main body of a pipe bending apparatus according to the present invention.
FIG. 3 is a side view of a part of the apparatus main body of FIG.
FIG. 4 is a front view of the apparatus main body of FIG.
FIG. 5 is a plan view of the apparatus main body of FIG.
FIG. 6 shows another embodiment of the pipe bending apparatus according to the present invention, and is a perspective view of the apparatus main body as viewed from one side.
FIG. 7 is a perspective view of the apparatus main body of FIG. 6 as viewed from the other side.
FIG. 8 is a partially cutaway front view of the apparatus main body of FIG.
FIG. 9 is a plan view of the apparatus main body of FIG.
FIG. 10 shows still another embodiment of the pipe bending apparatus according to the present invention, and is a perspective view of the apparatus main body viewed from one side, with the bending portion being away from the pipe. Indicates the state.
FIG. 11 is a perspective view showing a state in which the bending portion is moved to the bending position of the pipe in the apparatus main body of FIG.
FIG. 12 is a perspective view showing a state where the pipe is bent in the apparatus main body of FIG.
FIG. 13 is an explanatory diagram for explaining the toggle mechanism in the apparatus main body of FIG.

Hereinafter, a pipe bending apparatus according to the present invention will be described in detail with reference to the drawings.
The pipe bending apparatus 1 shown in FIG. 1 includes an apparatus main body 2 and a stand 3 that supports the apparatus main body 2.
As shown in FIG. 2, the apparatus main body 2 includes a bending roll 20 in the frame 10, a positioning means 30 for positioning the pipe A with respect to the circumferential surface of the bending roll 20, and a part to bend the pipe A It is comprised by the deformation | transformation means 40 which revolves with respect to the bending roll 20 and carries out a curved deformation | transformation, holding a with the bending roll 20.
As shown in FIGS. 3 to 5, the bending roll 20 includes a flange 22 at a lower portion of the peripheral surface 21, and a curved surface corresponding to the diameter of the pipe A is formed at the meeting portion of the peripheral surface 21 and the flange 22. Yes. At the center of the bottom surface of the bending roll 20, a rotating shaft 23 extending downward is provided so as to be rotatable with respect to the bending roll 20. The rotating shaft 23 is supported by the frame 10 so as to be rotatable and slidable in the axial direction.
On the other hand, as shown in FIG. 4, the frame 10 has an L-shape that includes a portion 11 a that extends in a direction perpendicular to the axis of the rotating shaft 23 and a portion 11 b that extends in a direction parallel to the axis. The groove 11 is formed. A bar handle 14 having a proximal end inserted into the rotary shaft 23 is provided in the groove 11. A spherical grip 14 a is attached to the tip of the bar handle 14.
The positioning means 30 is constituted by positioning pins 31 erected on the frame 10 so as to be slidable in the axial direction. As shown in FIG. 3, a notch 32 parallel to the axis is formed at the upper end of the positioning pin 31. The upper end of the notch 32 is chamfered 32a, and the lower end is A curved surface corresponding to the diameter of the pipe A is formed. The positioning pin 31 is penetrated by a bolt 33, and the tip of the bolt 33 is inserted into the flange 22 of the bending roll 20. Accordingly, the positioning pin 31 is integrally connected to the bending roll 20 and is moved up and down as the bending roll 20 moves up and down.
The deformation means 40 includes a roll-shaped pressure 41. An annular recess 42 corresponding to the diameter of the pipe A is formed on the peripheral surface of the pressure 41 as shown in FIG. The pressure 41 is supported by a plate arm 43, and the plate arm 43 is fixed to the rotary shaft 23.
In the deformation means 40, the plate-like arm 43 is rotated around the rotation shaft 23 as the rotation shaft 23 rotates, and the pressure 41 is moved along the circumferential surface of the bending roll 20.
In the apparatus main body 2 configured as described above, in a state where the rod handle 14 is accommodated in the portion 11b of the groove 11 in the frame 10, the rotating shaft 23 is lowered, and the rod handle 14 is moved in the rotation direction. Is regulated. When the bar handle 14 is moved up, the rotary shaft 23 is moved up, and the plate arm 43, the bending roll 20, the positioning pin 31, and the deformation means 40 are moved up accordingly.
On the other hand, the stand 3 includes a base 50, a plate-like arm 51, and an arcuate guide 52 as shown in FIG. The base 50 is formed with a groove 50a that opens on one side surface and the upper surface. And the lower part of the plate-shaped arm 51 is accommodated in the groove | channel 50a of the base 50, and is rotatably supported by the axis | shaft 50b. Further, a stopper 50c is installed on the base 50, and the amount of rotation of the plate arm 51 is restricted.
The arc-shaped guide 52 is installed at the upper end of the plate-like arm 51. The arc-shaped guide 52 is formed in a concentric arc shape with the pipe A as the center in a state where the stand 3 is in the processing position. As shown in FIG. 4, arc-shaped ridges 53 are formed on the side surfaces of the arc-shaped guide 52. On the other hand, an arcuate recess 15 is formed on the side surface of the frame 10 of the apparatus body 2. Then, the arc-shaped concave portion 15 of the apparatus main body 2 is fitted into the arc-shaped convex section 53 of the arc-shaped guide 52, and the apparatus main body 2 is moved to an appropriate position of the arc-shaped guide 52, where the apparatus main body 2 is fixed by a bolt or the like.
As shown in FIG. 1, the stand 3 is installed on a rail B of a pipe bending machine or the like. The rail B is disposed in parallel with the pipe A. And the apparatus main body 2 moves on the concentric circle centering on the pipe A along the arc-shaped guide 52 in the state which the plate-shaped arm 51 is accommodated in the groove | channel 50a of the base 50. FIG. Therefore, the space between the bending roll 20, the positioning pin 31 of the positioning means 30, and the pressure 41 of the deformation means 40 is always positioned toward the pipe A.
In the pipe bending apparatus 1 configured as described above, the stand 3 is moved to a position where the pipe A is to be bent along the rail B of the bending machine and positioned there. Then, the apparatus main body 2 is moved along the arcuate guide 52 and positioned in a posture corresponding to the bending direction of the pipe A.
Then, the bar handle 14 is operated to move the rotating shaft 23 upward, and the bending roll 20, the positioning pin 31, and the pressure 41 are aligned with the pipe A as shown by a two-dot chain line in FIGS. Let
In this state, the rod handle 14 is rotated from 11 a of the groove 11 to the outside of the frame 10. Then, the rotating shaft 23 is rotated, and the plate-like arm 43 is rotated accordingly, and the pressure 41 is revolved along the bending roll 20. Therefore, the pipe A is bent so as to follow the bending roll 20.
In the bending apparatus 1 shown in the drawings in the above embodiment, the bending direction of the pipe A can only be bent in the range of 90 degrees from the upper side to one side in the horizontal direction. If it is a semicircular arc, it can be up to 180 degrees. Further, in order to be able to bend to other ranges, the other rail B is installed at a position opposite to the rail B with respect to the pipe A in a plan view, and the bending roll 20, the positioning pin 31, the pressure 41, etc. This can be achieved by installing the bending apparatus 1 installed at a position symmetrical to those of the apparatus main body 2 on another rail B.
Further, a plurality of the bending devices 1 are installed along the rail B, and the stand 3 is tilted so that the device main body 2 is positioned away from the pipe A, and the pipe A is bent. You may make it set to the pipe A by standing the stand 3 only of the bending apparatus 1 corresponding to the part a to be performed, and performing a bending process sequentially.
6 to 9 show another embodiment of the apparatus main body in the pipe bending apparatus according to the present invention.
The apparatus main body 60 of the bending apparatus includes a bending roll 70, positioning means 80 for positioning the pipe A with respect to the circumferential surface of the bending roll 70, and the bending roll 70 with a portion a to be bent of the pipe A. And a deforming means 90 that revolves and bends with respect to the bending roll 70 while being sandwiched between the two.
The bending roll 70 has a substantially semicircular shape with a part cut away, and includes a flange 72 at a lower portion of the peripheral surface 71, and a concave portion 73 corresponding to the diameter of the pipe A is formed on the peripheral surface 71. A guide groove 74 extending in an oblique direction is formed on the upper surface of the bending roll 70, and a pin 75 is erected at the center of the groove 74. Further, as shown in FIG. 7, a pin 77 is erected on the notch surface of the bending roll 70. On the bottom surface of the bending roll 70, as shown in FIG. 9, a groove cam 78 having a substantially semicircular locus 78a and a locus 78b extending substantially radially from the end of the locus 78a is formed. ing.
In the bending roll 70, a guide piece 79 fixed to the upper surface of a fixing block (described later) of the positioning means 80 is fitted into a guide groove 74, and a pin 75 is inserted into a long hole 79a formed in the guide piece 79. And the pin 77 is inserted and supported by the long hole mentioned later formed in the fixed block. Accordingly, the bending roll 70 is moved along the guide piece 79.
As shown in FIG. 7, the positioning means 80 includes a fixed block 81 erected on the upper surface of the side portion of the base plate 63, and a pivot that is rotatably supported by a shaft 82 on the side surface of the base plate 63. And a block 83.
On the surface of the fixed block 81 on the rotating block 83 side, a protruding portion 84 formed in a curved surface corresponding to the diameter of the pipe A is formed. In addition, a long hole 81 a parallel to the base plate 63 is formed in the center portion of the fixed block 81.
On the other hand, a recess 85 is formed on the surface of the rotation block 83 on the fixed block 81 side. The bottom surface of the recess 85 is formed in a curved surface corresponding to the diameter of the pipe A. Further, a roller 87 is disposed on the bottom surface of the rotation block 83 via a bracket 86.
A frustoconical cam 88 is disposed concentrically on the rotating shaft 62. As shown in FIG. 8, a spring 89 is interposed between the bracket 86 and the base plate 63, and the roller 87 is pressed against the cam 88 by the urging force of the spring 89.
The deforming means 90 includes a roll-shaped pressure 91 as shown in FIG. An annular recess 92 corresponding to the diameter of the pipe A is formed on the peripheral surface of the pressure 91. The pressure 91 is supported by a plate arm 93, and the plate arm 93 is fixed to the rotating shaft 62. Further, on the upper surface of the plate-like arm 93, as shown in FIG. 8, a pin 94 that is fitted into a groove cam 78 formed on the bending roll 70 is provided upright.
In the deforming means 90, the plate arm 93 is rotated around the rotation shaft 62 as the rotation shaft 62 rotates, and the pressure 91 is moved along the circumferential surface of the bending roll 70.
When the plate arm 93 is rotated, the pin 94 comes into pressure contact with the side wall of the locus 78b of the groove cam 78, and the bending roll 70 is guided by the guide piece 79 and moved in the direction of the pipe A. Accordingly, the pipe A is accommodated in the recess 73 of the bending roll 70.
In the pipe bending apparatus constructed in this way, the bar handle 14 is operated to move the rotary shaft 62 upward as in the above embodiment, and the bending roll 70 and the pressure 91 are moved as shown in FIG. Is matched to pipe A.
In this state, the rod handle 14 is rotated to rotate the rotating shaft 62. When the rotating shaft 62 is rotated, the cam 88 is rotated accordingly, and the roller 87 rides on the mountain 88b of the cam 88. Therefore, the rotation block 83 is rotated about the shaft 82 and the recess 85 is engaged with the pipe A. Therefore, the pipe A is sandwiched between the rotating block 83 and the fixed block 81.
At the same time, the plate arm 93 is also rotated around the rotation shaft 62. Then, the bending roll 70 is moved in the direction of the pipe A via the pin 94, and the pipe A is accommodated between the concave portion 73 of the bending roll 70 and the concave portion 92 of the pressure 91. Subsequently, the pressure 91 is revolved with respect to the bending roll 70, so that the pipe A is bent so as to follow the bending roll 70.
10 to 13 show still another embodiment of the apparatus main body in the pipe bending apparatus according to the present invention.
The apparatus main body 100 of this bending apparatus includes a bending roll 120 on a frame 110, positioning means 130 for positioning the pipe A with respect to the circumferential surface of the bending roll 120, and a portion a to be bent of the pipe A. The bending means 120 is configured to revolve with respect to the bending roll 120 while being held between the bending roll 120 and the bending roll 120, the positioning means 130, and the operation means 150 that moves the deformation means 140.
The frame 110 is L-shaped by a vertical wall 110a and a horizontal wall 110b. A notch opened upward is formed in the central portion in the width direction of the vertical wall 110a, and a guide groove 111 is formed on opposing surfaces that define the notch. Further, a stopper 112 for setting the bending angle of the pipe A is erected on the vertical wall 110 a of the frame 110.
The bending roll 120 includes a flange 122 at a lower portion of the peripheral surface 121, and a curved surface corresponding to the diameter of the pipe A is formed at the meeting portion of the peripheral surface 121 and the flange 122. At the center of the bottom surface of the bending roll 120, a rotating shaft 123 that passes through the horizontal wall 110 b of the frame 110 and extends downward is provided so as to be rotatable with respect to the bending roll 120. The rotating shaft 123 is supported on the horizontal wall 110b of the frame 110 so as to be rotatable and slidable in the axial direction. Further, a projection 124 for setting a bending angle of the pipe A by the stopper 112 is formed on the peripheral surface of the rotating shaft 123. The protrusion 124 is formed on a ring 125 fitted to the rotary shaft 123, and the ring 125 is locked to the rotary shaft 123 by a set screw 126. Therefore, the ring 125 can be locked at an arbitrary position in the circumferential direction of the rotating shaft 123, whereby the position of the protrusion 124 can be arbitrarily set.
The positioning means 130 includes a plate (not shown) that supports the bending roll 120 or a guide block 131 that is directly fixed to the bending roll 120. The guide block 131 has guide protrusions 132 on both side surfaces. The guide protrusions 132 are fitted into guide grooves 111 formed in notches of the frame 110 and are moved up and down together with the bending roll 120. A notch 133 that opens upward and is parallel to the axis is formed in the intermediate portion of the guide block 131 in the width direction. The notch 133 has a gap corresponding to the diameter of the pipe A, and a chamfer 133a is formed at the upper end of the notch 133, and a curved surface corresponding to the diameter of the pipe A is formed at the lower end. Yes.
The deformation unit 140 includes a roll-shaped pressure 141. An annular recess 142 corresponding to the diameter of the pipe A is formed on the peripheral surface of the pressure 141. The pressure 141 is supported by a plate arm 143, and the plate arm 143 is fixed to the rotating shaft 123.
In this deformation means 140, the plate-like arm 143 is rotated around the rotation shaft 123 as the rotation shaft 123 rotates, and the pressure 141 sandwiches the pipe A between the pressure 141 and the bending roll 120. Is moved along the circumferential surface of the bending roll 120.
The operating means 150 includes a rod handle 151, and by operating the rod handle 151, the rotating shaft 123 is slid in the axial direction or the rotating shaft 123 is rotated in the circumferential direction. In this operation means 150, the lower end of the rotating shaft 123 and the rod handle 151 are linked via a toggle mechanism 152.
The toggle mechanism 152 includes a first link rod 155 that is rotatably supported via a pin 154 on a protrusion 153 formed on the lower surface of the horizontal wall 110 b of the frame 110, and an upper end on the lower end of the rotating shaft 123. A second link rod 157 rotatably supported via a pin 156, and a lower end of the first link rod 155 and a lower end of the second link rod 157 are connected to each other by a pin 158 so as to be rotatable. Has been. A bar handle 151 is erected on the second link rod 157 in the vertical direction. Further, a stopper plate 159 is disposed on the back surface of the first link rod 155 (the surface opposite to the direction in which the bar handle 151 extends).
In the operation means 150 configured as described above, as shown by a solid line in FIG. 13, the rod handle 151 is inclined downward, and the rotating shaft 123 is in the lower position. Therefore, the plate arm 143, the bending roll 120, the pressure 141, and the guide block 131 are located below the pipe A. When the bar handle 151 is moved upward as indicated by the arrow, the second link rod 157 is rotated about the pin 156 and the rotary shaft 123 is moved upward via the pin 156. Accordingly, the plate arm 143, the bending roll 120, the pressure 141, and the guide block 131 are moved up. Then, as shown by the two-dot chain line, when the first link rod 155 and the second link rod 157 overlap, the bending roll 120, the pressure 141, the positioning means 130, and the deformation means 140 are in positions corresponding to the pipe A. Reach. In this state, the rod handle 151 is in a horizontal state, and even if the rod handle 151 is further moved upward, the second link rod 157 hits the stopper plate 159 and further movement is restricted. Therefore, the rotating shaft 123 is maintained at the uppermost position.
In the pipe bending apparatus constructed in this way, when the free end of the rod handle 151 is pulled upward from the state shown in FIG. 10, the rotary shaft 123 is moved upward via the toggle mechanism 152 accordingly. As shown in FIG. 11, the rod handle 151 is perpendicular to the axis of the rotary shaft 123 (horizontal), and the plate arm 143, the bending roll 120, the pressure 141, and the guide block 131 are It is moved to a position corresponding to pipe A.
In this state, as shown in FIG. 12, when the rod handle 151 is rotated in the circumferential direction of the rotation shaft 123, the plate arm 143 is also rotated around the rotation shaft 123. Then, the pressure 141 of the deformation means 140 is revolved with respect to the bending roll 120, whereby the pipe A is bent so as to follow the bending roll 120.
Although various embodiments of the pipe bending apparatus according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and the present invention described in the claims is not limited thereto. Of course, further modifications and changes are possible within the scope of the technical idea.

According to the pipe bending apparatus according to the present invention described above, since the apparatus main body can move around the bending position, the bending direction of the pipe can be arbitrarily set without requiring a mechanism for rotating the pipe. In addition, since the positioning means and the deformation means can be operated by one handle operation, the apparatus can be configured simply. Therefore, it can be widely used as a pipe bending apparatus used in automobiles and the like.

Claims

An apparatus main body comprising positioning means for positioning the pipe with respect to the bending roll; and a deforming means for moving along the bending roll while pressing the pipe against the bending roll to bend the pipe; In a pipe bending apparatus constituted by a stand that is supported at a predetermined position,
An arc guide is provided at the upper end of the stand, and the apparatus body is installed on the arc guide so that the apparatus body moves around the pipe around the bending position,
A rotary shaft is disposed so as to be rotatable with respect to the frame of the apparatus main body and slidable in the axial direction, a rod handle is disposed on the rotary shaft, and the rotary shaft is moved upward by the rod handle. A pipe bending apparatus, wherein the positioning means is engaged with a pipe and the rotating means is rotated to bend the deformation means.
The pipe bending apparatus according to claim 1, wherein the stand is disposed so that the apparatus main body can move in a direction away from a bending position with respect to the pipe.
The pipe bending apparatus according to claim 1 or 2, wherein the stand is installed so as to be movable in a direction parallel to the axis of the pipe.
The bending roll is disposed so as to be movable back and forth with respect to the pipe, a groove cam is formed on the bottom surface, a plate arm is fixed to the rotating shaft, and a pin is erected on the upper surface of the plate arm. A pin is inserted into the groove cam of the bending roll, the plate-like arm is rotated with the rotation of the rotating shaft, and the bending roll is directed to the pipe via the pin and the cam groove of the bending roll. The pipe bending apparatus according to any one of claims 1 to 3, wherein the pipe bending apparatus is moved.
An L-shaped groove having a portion extending in a direction perpendicular to the axis of the rotation axis and a portion extending in a direction parallel to the axis is formed in the frame of the apparatus main body, and the rod handle is guided by the groove. The pipe bending apparatus according to any one of claims 1 to 4, wherein the pipe bending apparatus according to any one of claims 1 to 4 is provided.
The pipe bending apparatus according to any one of claims 1 to 4, wherein the rotating shaft and the rod handle are linked through a toggle mechanism.
The toggle mechanism includes a lower end of a first link rod whose upper end is rotatably supported by the frame of the apparatus body, and a lower end of a second link rod whose upper end is rotatably supported by the rotation shaft. The pipe bending apparatus according to claim 6, wherein the pipe bending apparatus is configured to be rotatably supported and to have the rod handle erected on the second link rod.