JP2011161468A - Pipe bender - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe bender in which the whole pipe bending device is rotatable. <P>SOLUTION: A fixed plate 32b is erected at the right end of a base 10 and an index shaft device 32 is provided on the right-face side of the fixed plate. The index shaft device has an index table 32a fixed to a ring gear 32h. A shifting device 34 is provided on the right-face side of the index table, the shifting device 34 being provided with a shifting plate on which a bending shaft device 40 including a pressure device 30, a clamping device 36 and a bending roller are mounted and fixed. A pair of proximity switches 32 are provided on the fixed plate and respective rotational positions in the clockwise direction and the counterclockwise direction of the index table rotated by a motor 32c are set and arranged so as to correspond to an angle of 180°. Consequently, by rotating the index table at 180°, a pipe is bent normally and continuously without swinging the pipe at 180° in the predetermined bending position. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to bending of a metallic pipe (hereinafter simply referred to as a pipe), and more particularly to a pipe bender that can bend the pipe in any direction.

FIG. 1 of Patent Document 1 has a rotatable bending mold 11 and a fastening mold 12 that can move in the distance and can rotate together with the bending mold 11. A bending mechanism 10 that bends the pipe P by sandwiching the pipe P that is a member and rotating it integrally around the rotation center O-1 of the bending mold 11 is provided. A plug insertion mechanism A is provided in which the plug 23 is inserted and rotated together with the bending mechanism 10. The plug insertion mechanism A is supported by the plug operating position X supported by the bending mechanism 10 and the stationary main body. A pipe bender having a moving operation device 50 which is attached through a guide means 40 so as to be movable over a retreat position and moves to a plug operation position X and a retreat position is introduced. Bending than the pipe tip with performed without interfering with the plug insertion mechanism, the invention to make mechanisms bent during the machining to operate light is disclosed.

FIGS. 1 and 8 of Patent Document 2 relate to a pipe bender and a pipe bending method, and in particular, the final bending portion of the target pipe can be bent quickly and efficiently, the structure is simplified, and the number of parts is reduced. Therefore, the push rod 50 accommodated in the chuck 1 is connected to the pipe end portion P1 of the target pipe P and the chuck. Clamp base while pressing the target pipe in the central axis direction I by the chuck via the push rod by the clamp base 3 and the pressure base 4 and at least the front most part is located on the external front F. Is a method of bending the final bending planned portion by rotating it to the side away from the pressure base integrally with the bending die 2, The specification paragraphs 0026-0028, is described as follows.

That is, a chuck for gripping the pipe end portion of the target pipe from the outer peripheral side, a bending die formed with an arcuate portion for bending guidance with respect to the planned bending portion of the target pipe, and the bending portion of the target pipe with the bending die. A clamping base that holds the pressure between the clamping base, and a pressure base that is positioned on the chuck side of the clamping base and holds the planned bending portion of the target pipe between the bending mold and the pipe core direction of the target pipe Among the plurality of planned bending portions arranged in the same direction, for the planned bending portion other than the final planned bending portion located near the tube end on the chuck side, the chuck holding the pipe tube end portion is moved in the direction of the center axis. And rotating around the central axis, positioning the planned bending portion at an appropriate position with respect to the bending mold in a required rotational posture, and holding the planned bending portion with the clamp table and the pressure table. The clamp base is integrated with the bending mold and moved away from the pressure base while pressing and urging the pipe end of the target pipe in the direction of the central axis by the chuck that grips the pipe end of the target pipe. In a pipe bender that rotates and bends the part to be bent,
A push rod is detachably provided in the chuck, and the push rod is held in the chuck so that the chuck for gripping the pipe pipe end is moved in the direction of the center axis and rotated around the center axis. It is provided so that the final planned bending portion of the pipe pipe end can be installed at an appropriate position with respect to the bending mold in a required rotation posture by being moved,
When the chuck is released from the pipe pipe end and is moved backward in the direction of the center axis and to the non-interference position with the pressure base, the push accommodated in the chuck The rod is placed with the pipe end of the target pipe and the front part of the chuck at least in front of the chuck, so that the rod is pressed while the chuck pushes the pipe end of the target pipe through the push rod. The clamp base is rotated integrally with the bending die to the side away from the pressure base to bend the final planned bending portion of the target pipe, and the invention is characterized in that it is bent. The invention includes a chuck for gripping a pipe end portion of a target pipe from the outer peripheral side, a bending die formed with an arc-shaped portion for bending guidance with respect to a planned bending portion of the target pipe, A clamp base that holds the planned bending portion of the pipe with the bending mold, and a pressure that is held on the chuck side of the clamp base and holds the planned bending section of the target pipe with the bending mold. Among the plurality of planned bending portions arranged in the direction of the core of the target pipe, the pipe pipe end portions of the planned bending portions other than the final planned bending portion located near the tube end on the chuck side are gripped. The chuck is moved in the direction of the center axis and rotated around the center axis so that the planned bending portion is positioned at an appropriate position with respect to the bending mold in a required rotation posture, and the clamp table and the pressure table are The clamping base is integrated with the bending mold while the pipe end of the target pipe is pressed and urged by the chuck that holds the pipe end of the target pipe while the planned bending portion is held with pressure. In the pipe bending method spaced side is rotated subjected to bending a portion to be bent from,
The bending of the final planned bending portion of the target pipe is performed by moving the chuck that grips the pipe pipe end in the state where the push rod is removably accommodated in the chuck and moving it toward the central axis. A state where the final bending scheduled portion of the pipe pipe end portion is installed at an appropriate position with respect to the bending mold in a required rotation posture by rotating around, and then the chuck is released from the pipe pipe end portion. The push rod accommodated in the chuck by moving the chuck back in the direction of the center axis and to the non-interference position with the pressure base moves the pipe end of the target pipe and the outside front of the chuck. At least the front most part is located and left behind, and then the clamp base and the pressure base are paired by the chuck via the push rod. Since the clamp table is rotated in the direction away from the pressure table integrally with the bending mold while pressing the pipe in the direction of the center axis, the final bending portion is bent. The number of steps for bending the final planned bending portion of the pipe is omitted, and the final bending target portion can be bent quickly and efficiently. In addition, the power consumption of the motor required to move the chuck back and forth in the axial direction can be reduced, and the structure and control system are simplified and the number of parts is reduced. Equipment costs are low.
Further, the push rod is disposed on the gripping claws of the chuck provided at the rear end of the pipe end of the target pipe and the front end of the chuck at the time of bending the final bending portion of the pipe end of the target pipe. The chuck is provided so that it can be pressed in the direction of the central axis, and the gripping claw of the chuck is pressed in the direction of the central axis by a common driving source together with the chuck, so that the final planned bending portion of the target pipe is integrated with the bending die. Since it is turned to the side away from the pusher base and the final bending portion is bent, the number of steps for bending the final bending portion of the target pipe is complicated. The final bending scheduled portion can be bent quickly, efficiently and reliably.

Further, the advancing / retreating movement operation of the chuck and the pressing operation required for the final bending of the target pipe are performed by driving one driving cylinder as a common driving source, and this driving cylinder is driven. This is done by driving a motor that rotates and moves the chain provided on the gantry, so that less power is required to operate the motor and the motor can be reduced in capacity. The system is simplified, the number of parts is reduced, manufacture and assembly are facilitated, and manufacturing costs, equipment costs, etc. are reduced.
Further, the push rod is generally formed in a substantially cylindrical shape, and is normally accommodated in an accommodation hole provided in the chuck, and a mandrel that can be inserted into the pipe end of the target pipe is centered in the push rod. It is inserted so as to be movable in the axial direction, and the front end is detachably provided on the expanding engagement shoulder formed on the front end side of the mandrel when the chuck moves backward, and the front end is connected to the pipe end of the target pipe. An engaging portion that can be engaged and disengaged is formed, and a first outer collar portion that can be engaged with a gripping claw of the chuck when the chuck is pressed is formed on the outer periphery of the intermediate portion, and a push rod is formed in the receiving hole at the rear end. Since the second outer flange portion that can come into contact with the stopper when slidable is formed, the final bending portion of the pipe end portion of the target pipe is bent during the bending process. Push between the back of the tube end and the chuck. It can be reliably performed by pressing the pipe end of the target pipe through the rod or driving one drive cylinder as a common drive source to accommodate the push rod in the chuck accommodation hole. .

JP-A-5-117719 JP 2004-141891 A

The invention disclosed in Patent Document 1 described above relates to a plug insertion mechanism that inserts a plug into a pipe tip during bending. Further, in the invention disclosed in Patent Document 2, the push rod accommodated in the chuck is left behind with the pipe end of the target pipe and the front part of the chuck at least most of the front part being positioned. The clamp table and the pressure table are rotated together with the bending mold to the side away from the pressure table while pressing the target pipe in the center axis direction by the chuck via the push rod by the clamp table and the pressure table. And bending the final planned bending portion.

Patent Documents 1 and 2 described above are improvements on the operation of holding the pipe cross-sectional shape of the bending portion in a circular shape using a plug or mandrel, and all of them are a bending die, a clamping die (clamp stand), a pressure stand, The chuck includes a chuck and movement guide means for the chuck.

In the conventional pipe bender including Patent Documents 1 and 2, the rotation center axis of the bending die is arranged at a position displaced by the rotation radius in the direction orthogonal to the pipe axis, and naturally the rotation of this bending die is performed. The central axis is fixed on the pipe bender. For example, as shown in FIGS. 1 and 8 of Patent Document 2, in a plan view of the pipe bender, the bending die 2 is configured to bend the pipe P to the right side, and the rotation center axis thereof is fixed to one end side of the pipe bender. Arranged in combination with a rotating mechanism.

By the way, in such a conventional pipe bender, the following problems arise especially when the number of bent portions of the pipe is relatively large and the interval between the bent portions is long.

FIGS. 5 and 6 of the present application explain the circumstances, and FIG. 5 shows the state of bending of the pipe three-dimensionally. In FIG. 5A, the pipe P1 has a tip s and a terminal e, and two bending positions c1 and c2 are formed. Reference sign Psc1 is the distance between the tip s and the bending position c1, reference sign Pc1c2 is the distance between the bending position c1 and the bending position c2, and reference sign Pc1e is the distance between the bending position c2 and the end e. These intervals are illustrated as L1, L2, and L3, respectively.

The pipe P2 indicates that the interval Pc1e between the pipes P1 is formed in the opposite direction.
FIGS. 6A and 6B show the bending steps (1) to (4) of the pipes P1 and P2 in FIG. 5A, respectively. That is, in FIG. 6A, step (1) indicates that the pipe P1 is clamped by the clamp CL to the bending roller RL at a position L1 from the tip s. Step (2) shows a state where the pipe P1 is rotated 90 degrees by the bending roller RL and the clamp CL. Step (3) shows a state where the pipe P1 is fed forward by L2 and further rotated 90 degrees upward by a tilting device (not shown). Step (4) shows a state in which the pipe P1 is further rotated 90 degrees by the bending roller RL and the clamp CL in the state of the step (3).

FIG. 6B is the same as each step in FIG. 6A except that it shows a state rotated 90 degrees downward by the tilting device in step (3), and the description thereof is omitted. To do.
FIG. 5B shows an example of bending of the pipe P3, where the bending positions c1, c2, c3, c4, and c5 are formed by continuous operation from the tip s to the terminal e. The bending positions c1 and c2 of the pipe P3 are bent similarly to the pipe P2 of FIG. In the subsequent bending process at the bending position c3, since the bending roller RL rotates clockwise, the bending process is performed after the pipe P3 is rotated 180 degrees by the tilting device. In the subsequent bending process at the bending position c4, after bending from c3 to c4, the pipe P3 is bent without being rotated. Further, in the subsequent bending process at the bending position c5, similarly, after being fed from c4 to c5, the pipe P3 is bent without being rotated. However, as indicated by a broken line, when the end is e ′, it is necessary to rotate the pipe P3 by 180 degrees.

In this way, the pipe P3 can be bent at the bending positions c1 to c5. However, as shown in FIG. 5B, when the distance between the tip s and c1 and c3 to c4 is long, the pipe P3 is bent. There is a risk that it will hit the floor where the bender is installed, and therefore the bending side of the pipe bender requires space on the lower side. For this purpose, it is necessary to provide a deep groove (pit) on the bending side of the pipe bender, which not only increases the construction cost of installing the pipe bender, but is also preferable from the viewpoint of work safety for the operator. I can't say that.

As described above, there are two pipe bending portions in the vertical direction in FIG. 5B. However, as the number of pipes further increases, the depth of the pits needs to be increased accordingly. As a countermeasure against such a work situation, it may be possible to reset the bent pipe part so that it is in an upward orientation during the bending work. The work efficiency is reduced. In addition, even if the pipe orientation is newly set, it may be necessary to rotate 180 degrees in the next bending process, which may cause a collision with the floor when swinging the bent pipe part. Furthermore, pipe bending work with many bending positions is complicated and has a problem that efficiency is lowered and it becomes practically difficult.

  As a result of intensive studies to solve the above problems, the inventor of the present application has fixed the positional relationship between the bending roller and the pipe as viewed from the pipe bender body in the conventional pipe bender. For example, as shown in FIG. Focusing on the mechanism in which the pipe is bent clockwise in contact with the right side of the bending roller, the pipe is further counterclockwise in contact with the left side of the bending roller in plan view. It has been found that the above problem can be basically solved by making it possible to perform bending.

  Therefore, an object of the present invention is to provide a pipe bender capable of setting the positional relationship between the pipe and the bending roller so that the next bending process can be performed without swinging the bending end part even if the number of bending positions is large. It is to provide.

In order to achieve the above object, a pipe bender according to the present invention comprises:
A base provided with a guide rail parallel to the axis of the pipe on the upper surface, a moving device that travels on the guide rail, attached to the moving device, the pipe can be inserted inside, and the outer periphery of the pipe at the tip A tilting device that has a chuck portion that is fixedly held and rotates the chuck portion to a predetermined angular position, and is provided for pipe bending at one side end of the base, facing the pipe bending roller, and the pipe Clamp means having a clamp piece for pressing and fixing the outer peripheral surface of the pipe abutted against the bending roller, pressure means having a pressure piece adjacent to the clamp piece and pressing the outer peripheral surface of the pipe, and the pipe bending roller together with the clamp piece A pipe bender equipped with a bending apparatus comprising a bending form means for rotating a fixed amount,
The pipe bender further includes an index shaft device having an indexing table that rotates a predetermined amount on a support plate that is erected and fixed to one end of the base, and each means of the bending device. And a shift device provided with a shift table whose position can be adjusted in one direction on the indexing table.
In that case, the predetermined amount of rotation of the index device is preferably set to 90 degrees or 180 degrees.

The pipe bender according to the present invention has a base provided with a guide rail parallel to the axis of the pipe on the upper surface, a moving device that travels on the guide rail, is attached to the moving device, and the pipe can be inserted into the inside. A tilting device that has a chuck portion for fixing and holding the outer periphery of the pipe at the tip end, and a tilting device that rotates the chuck portion to a predetermined angular position, and is provided for pipe bending at one end portion of the base. Clamping means having a clamp piece that presses and fixes the outer peripheral surface of the pipe that faces the bending roller and is in contact with the pipe bending roller, pressure means that has a pressure piece that is adjacent to the clamp piece and presses the outer peripheral surface of the pipe, and the pipe bending A pipe bend provided with a bending apparatus comprising a bending form means for rotating a roller by a predetermined amount together with the clamp piece. A chromatography,
The pipe bender further includes an index shaft device having an indexing table that rotates a predetermined amount on a support plate that is erected and fixed to one end of the base, and each means of the bending device. And a shift device having a shift table capable of adjusting the position in one direction on the indexing table, so that even if the number of bending positions of one pipe is large, the bending end portion There is an effect that bending can be performed at the next bending position without swinging.

BRIEF DESCRIPTION OF THE DRAWINGS The whole structure of the pipe bender by this invention is shown, (a) is a top view of a pipe bender, (b) is a front view, (c) is a right view of (b). It is a perspective view which shows the principal part of the index apparatus of FIG. It is a perspective view which shows the principal part of the shift apparatus of FIG. It is a perspective view which shows the arrangement | positioning relationship of the bending shaft apparatus of FIG. 1, a clamp apparatus, and a pressure apparatus principal part. Each of the pipes is illustrated three-dimensionally, (a) shows a case where two pipes are bent between the tip and end of one pipe, and (b) shows one pipe. The case where the pipe is bent at five points is shown. 5A and 5B respectively illustrate the bending process of the pipes P1 and P2 in FIG. 5A, where (a) corresponds to the bending process of the pipe P1, and (b) corresponds to the bending process of the pipe P2. ing.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 shows the overall structure of a pipe bender according to the present invention, in which (a) is a plan view of the pipe bender, (b) is a front view, and (c) is a right side view of (b). In FIG. 1A, reference numeral 10 is a base of a pipe bender and is arranged and configured on the floor surface by a frame structure F. Two guides 14 a and a rack 12 are provided in parallel on the upper surface of the base 10, and a moving device 14 that moves in the left-right direction in the drawing is provided on the guide 14 a. Reference numeral 18 is a servo motor attached to the moving device 14 and moves the moving device 14 via the rack 12 in accordance with a command from a control device (not shown).

A tilting device 20 is attached to the moving device 14, and a servo motor 16 is attached to the left end thereof. As shown in FIG. 2B, the tilting device 20 has a chuck portion 26 at the tip of a cylindrical body 22 having a hole through which a pipe can be inserted. The rotation of the motor 16 is transmitted to the chuck portion 26 via the cylindrical body 22. These moving devices and tilting devices are known and commercially available, and the detailed structure thereof is omitted.

Here, in the tilting device 20, the pipe is inserted into the hole of the cylindrical body 22 and is nipped by each of the hydraulically driven claws of the chuck portion 26 and rotated by a predetermined amount by the motor 16. It should be understood that the device 20 is moved in the axial direction of the pipe by the moving device 14.
A fixed plate 32b is erected on the right end of the base 10, a motor 32c is attached to the left surface side of the plate 32b, and an index shaft device 32 is provided on the right surface side. The index shaft device 32 has an indexing table 32a fixed to a bearing and a ring gear 32h attached to the outer periphery thereof. On the right side of the indexing table 32a is a shift plate on which a pressure device 30 having a pressure piece 30a and a clamping device 36 having a clamp piece 36a and a bending device 40 having a bending roller 40a are mounted and fixed. A shift device 34 provided with 34a is provided.

The index device 32, the pressure device 30, the clamp device 36, the bending device 40, and the shift device 34 constitute the pipe bending head HD of the pipe bender according to this embodiment.
Reference numeral 32e in FIG. 2C is a pair of proximity switches. In this embodiment, the rotation angle positions of the indexing table 32a by the motor 32c in the clockwise direction and the counterclockwise direction are set and arranged corresponding to 180 degrees. Furthermore, reference numeral 36e is a hydraulic cylinder for clamping.

FIG. 2 is a perspective view showing a main part of the index shaft device 32 of FIG. In FIG. 2, the indexing table 32a is rotatably arranged on the front side of the fixed plate 32b as described above. The index table 32a can rotate integrally with a ring gear 32h coupled to the outer peripheral side (rotation side) of a bearing 32f attached to the fixed plate 32b. As shown in the drawing, the rotation of the index table 32a is such that the rotation of the motor 32c is applied to the ring gear 32h via the pinion gear 32d on the back side of the table 32a. Reference numeral 32g denotes a locating pin bush (hole), and a locating pin (not shown) provided on the fixed plate 32b side is pushed out and inserted into the indexing table 32a to keep the index table 32a rotated 180 degrees.

Further, a shift plate 34a constituting the shift device 34 is arranged on the front side of the index table 32a. Reference numeral 34e (see FIG. 3) is a shift amount adjusting mechanism that adjusts and holds the position of the shift plate 34a in the left-right direction. Reference numeral RJ is a cylindrical rotary joint, and each central opening portion of the shift plate 34a, the indexing table 32a, the ring gear 32h, and the fixed plate 32b is indicated by a broken line in FIGS. It penetrates and is attached to the back side of the fixed plate 32b. A pipe to be bent is inserted through the cylindrical center hole. The rotary joint RJ is exchanged with the hydraulic unit on the back side. The hydraulic cylinder 36e for the clamping device 36 of the pipe bending head HD and the hydraulic cylinder for the pressure device shown in FIG. 1 are rotated 180 degrees together with the indexing table 32a as described above, so that they are rotated. However, a rotary joint RJ is arranged as means for supplying pressure oil to each cylinder.

FIG. 3 is a perspective view showing a main part of the shift device 34 of FIG. In FIG. 3, reference numeral 34b is a shift guide provided on the indexing table 32a, which allows the shift plate 34a to move only in the left-right direction. The shift amount adjusting mechanisms 34e provided at the four locations adjust the position in the left-right direction by bringing the adjusting bolt into contact with the side surface of the shift plate 34a as shown in the figure. Reference numeral 34c is a scale provided on the plate for visually confirming the adjustment of the shift plate 34a in the left-right direction, and 34d is an index attached on the indexing table 32a. The offset amount of the shift plate 34a with respect to the index table 32a can be visually confirmed at the relative position of the index 34d on the scale 34c.

FIG. 4 is a perspective view showing a positional relationship among the main parts of the bending device 40, the clamp device 36, and the pressure device 30 of FIG. In FIG. 4, the bending device 40 is composed of a servo motor 40d, a gear box 40c for transmitting the rotation to the gear 40b via a hypoid gear, and a bending roller 40a having the same axis as the rotation axis of the gear 40b. Has been.
A groove that contacts the outer periphery of the pipe is formed on the outer periphery of the bending roller 40a. Reference numeral 36a denotes a clamp piece for the pipe, which is configured to always press and fix the opposing outer peripheral surface of the pipe that is in contact with the bending roller 40a during bending.

Reference numeral 36b is a moving piece with the back side of the clamp piece 36a attached to the upper part, and is coupled to the piston rod of the hydraulic cylinder 36b via a link mechanism (not shown) in the side plates 36c and 36d. The hydraulic cylinder 36b is a clevis type so that the direction of the piston rod can be varied, and can be swung at its tip. Therefore, when the clamp piece 36a is separated from the bending roller 40a by the cylinder 36e, the clamp piece 36a moves simultaneously in the horizontal direction and vertically downward, so that interference with the pipe is avoided. In the drawing, the clamp device 36 is illustrated as being rotated 90 degrees together with the bending roller 40a. Reference numeral 30a denotes the pressure piece described above, which is disposed at a position adjacent to the clamp piece 36a before being rotated, and presses the outer peripheral surface of the pipe with a predetermined pressing force. Unlike the clamp device 36, the pressure device 30 does not rotate during bending. Further, during bending, the pipe outer peripheral surface is pressed with a predetermined force to prevent displacement of the pipe axis due to bending, but the pressing force is adjusted so as to slide with the pipe outer peripheral surface.

In the pipe bender according to the present embodiment having the above-described configuration, the pipe is bent to the left simply by rotating the index table 32a by 180 degrees at the bending position c2 of the pipe P1 in FIG. Thus, bending can be performed without rotating the pipe 180 degrees. This eliminates the need for an operation of swinging the pipe portion after bending forming by 180 degrees, and improves the safety of the operator. Further, the problem of the downward posture of the pipe P3 as shown in FIG. 5B is that the index table 32a is rotated 90 degrees or 180 degrees in advance so that the tip s of the pipe faces horizontally or upward. In addition, bending is performed at each bending position, and if it is necessary to rotate 180 degrees in the middle, the indexing table 32a is rotated 180 degrees at that time so that no swinging is required. Is possible.

In this embodiment, as shown in FIG. 1C, the proximity switch 32e is provided as a pair in which the indexing table 32a rotates by 180 degrees, but may be provided at a rotation angle position corresponding to every 90 degrees. Is possible.

DESCRIPTION OF SYMBOLS 10 Base 12 Rack 14 Moving apparatus 14a Guide 16, 18 Servo motor 20 Tilt apparatus
22 cylindrical portion 24 gear box 26 chuck portion 30 pressure device 30a pressure piece 32 index shaft device 32a indexing table 32b fixed plate 32c motor 32d pinion gear 32e proximity switch 32f bearing 32g locate pin bushing 32h ring gear 34 shift device 34a shift plate 34b Guide 34c Scale 34d Index 34e Adjustment mechanism 36 Clamp device 36a Clamp piece 36b Frame 36c, 36d Side plate 36e Cylinder 40 Index shaft device 40a Bending roller 40b Gear 40c Gear box 40d Servo motor F Frame structure RJ Rotary joint

Claims (2)

A base with a guide rail parallel to the axis of the pipe on the top surface,
A moving device that travels on the guide rail;
A tilting device that is attached to the moving device, has a chuck part through which the pipe can be inserted, and that fixes and holds the outer periphery of the pipe at the tip, and rotates the chuck part to a predetermined angular position
And a clamping means provided for pipe bending at one end of the base and having a clamping piece that presses and fixes an outer peripheral surface of the pipe facing the pipe bending roller and facing the pipe bending roller, and the clamping piece A pipe bender provided with a bending device comprising pressure means having a pressure piece adjacent to the pipe and a bending form means for rotating the pipe bending roller together with the clamp piece by a predetermined amount,
The pipe bender further includes an index shaft device having an indexing table that rotates a predetermined amount on a support plate that is erected and fixed to one end of the base, and each means of the bending device. And a shift device provided with a shift table capable of adjusting the position in one direction on the indexing table. The pipe bender according to claim 1, wherein the predetermined amount of rotation of the index device is set to 90 degrees or 180 degrees.

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