JP5647592B2 - Grooving device - Google Patents

Description

  The present invention relates to a grooving device, and more particularly to a grooving device that forms a groove at the end of a tube.

  When replacing or changing a pipe installed in a building, a part of the existing pipe is cut and removed, and a new pipe is connected to the existing pipe remaining in the building. In this case, a work is often performed to connect an existing pipe and a new pipe by forming grooves on the outer circumferences of the ends of both pipes and attaching joints that engage with the grooves. An apparatus for forming a groove in an end portion of an existing pipe left in a building for such work is known (for example, see Patent Document 1).

  In a conventional apparatus for forming a groove in a tube, a tube is provided between a grooved roller having a circumferential protrusion having a width slightly smaller than the width of the groove and a driving roller having a circumferential groove facing the circumferential protrusion. The tube axis by pinching, pressing the grooving roller against the outer surface of the tube to form a recess in the tube, rolling the grooving roller over the outer surface of the tube, and forming the recess continuously around the entire circumference of the tube A groove perpendicular to the direction is formed. To increase the depth of the groove, the pressing amount of the groove roller is gradually increased.

JP 2003-053435 A

  When the grooving roller is rolled on the outer surface of the tube, the direction of the grooving roller is shifted from the direction perpendicular to the axis of the tube, or the position of the grooving roller is moved in the axial direction of the tube. If this happens, the groove may not return to its original position when the grooving roller makes a round on the outer surface of the tube, and the groove may become spiral. When such a groove is formed, it becomes difficult to connect the two pipes with the joint. In the apparatus described in Patent Document 1, the end face of the tube is always brought into contact with the grooving apparatus so that the direction and position of the grooving roller are not shifted. However, in practice, the end face of the groove may be separated from the groove device, and the direction and position of the groove roller may be displaced.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a grooving device that prevents the grooving roller from being deviated in direction and position and forms a groove perpendicular to the axial direction of the tube in the tube.

  In order to achieve the above object, a grooving device according to the present invention is a grooving device that forms a circumferential groove at the end of a pipe, and is accommodated in the casing and the casing, and is parallel to the axial direction of the pipe. A drive transmission mechanism having a rotation output section having an axis, a rotation drive section for driving the drive transmission mechanism, and a drive having a circumferential groove attached to the rotation output section so as to be able to roll with respect to the pipe along the inner surface of the pipe A roller, a grooved roller that is pressed toward the drive roller across the tube so that the outer surface of the tube can be rolled, and is attached to the casing, and the grooved roller is directed toward the drive roller. A pressing mechanism, a track ring fixed to the tube and having a track surface in a plane perpendicular to the axial direction of the tube, and relative movement with respect to the tube over the entire circumference of the tube along the track surface Possible Anda movable body attached to the ring, by the mobile, is characterized in that to limit that deviates orientation and position of the grooved rollers for the tube.

  In the grooving device configured as described above, when the driving roller rotates, the driving roller and the grooving roller move relative to the pipe in the circumferential direction of the pipe, and are pressed toward the driving roller across the pipe. A grooved roller forms a groove in the tube. At that time, a track ring having a track surface located in a plane perpendicular to the axial direction of the tube is fixed to the tube, and the moving body moves relative to the tube along the track surface over the entire circumference of the tube. Thus, while the moving body makes a round of the pipe along the raceway surface of the raceway ring, the orientation and position of the casing are restricted from being displaced with respect to the pipe. As a result, the direction and position of the grooving roller attached to the casing is restricted from being displaced with respect to the tube, and a groove perpendicular to the axial direction of the tube can be accurately formed in the tube.

  In the embodiment of the grooving device according to the present invention, preferably, the moving body is provided in at least two places in the circumferential direction of the pipe.

  According to the grooving device configured as described above, the moving body is provided in at least two places in the circumferential direction of the pipe, that is, in different places, so that the direction and position of the grooving roller are shifted from the pipe. The effect of limiting can be enhanced, and a groove perpendicular to the axial direction of the tube can be reliably formed by the tube.

  In an embodiment of the grooving device according to the invention, preferably the raceway surface is oriented in the same direction as the end face of the tube, opposite the end face of the tube and from the end face of the tube. A first moving body that has a second raceway surface separated from the first raceway surface and is movable relative to the tube along the first raceway surface; and a second raceway surface A second moving body that can move relative to the tube along the line.

  According to the grooving device configured as described above, the direction in which the driving roller and the grooving roller are separated from the end surface of the tube (the track ring) by the first moving body that moves along the first track surface. The second roller moving along the second track surface causes the driving roller and the grooving roller to move over the tube. Limiting the displacement of their orientation and position by moving in a direction approaching the end face (a direction away from the track ring).

  In the embodiment of the grooving device according to the present invention, preferably, the moving body has a moving roller that can roll along the raceway surface.

  According to the grooving device configured as described above, the direction and position of the driving roller and the grooving roller are restricted from being displaced with respect to the pipe, and the groove between the raceway member and the moving body is formed. An increase in resistance can be suppressed.

  In an embodiment of the grooving device according to the invention, it preferably further comprises a roller mounted to limit the circumferential movement of the moving body tube relative to the track ring.

  According to the grooving device configured in this way, the direction and position of the driving roller and the grooving roller are restricted from shifting with respect to the pipe, and the movement member is restricted from moving in the circumferential direction. Between the track member and the moving body, and an increase in resistance between the track member and the moving body when forming the groove can be suppressed.

  In the embodiment of the grooving device according to the present invention, preferably, the movable body is provided in the movable body unit, the movable body unit and the casing are detachably attached to each other, and the movable body unit includes the groove and the tip chamfered portion. The casing has a hole for receiving the mounting pin and a lever member biased toward the groove of the mounting pin received in the hole, and the casing is chamfered when the mounting pin is inserted into the hole. After the portion moves the lever member against its bias to cause the mounting pin to enter the hole and the lever member engages the groove, the lever member prevents the mounting pin from coming out.

  According to the grooving device configured as described above, the track ring assembled with the movable body unit is fixed to the pipe so as to restrict the direction and position of the driving roller and the grooving roller from being shifted with respect to the pipe. Thereafter, the casing can be easily attached to the mobile unit.

  In an embodiment of the grooving device according to the invention, preferably the rotary drive comprises an electric motor having a motor housing, the motor housing being mounted on the casing for rotation relative to the casing, the motor handle being mounted on the motor housing. Is provided.

  In the grooving apparatus configured as described above, the direction and position of the driving roller and the grooving roller are restricted from being displaced with respect to the pipe, and the casing is formed along the pipe when the groove is formed in the fixed pipe. Thus, the electric motor and the motor handle perform a translational circular motion, and the working space can be reduced as compared with the case where the electric motor and the motor handle make a round.

  As described above, according to the grooving device of the present invention, the direction and position of the grooving roller can be prevented from shifting, and a groove perpendicular to the axial direction of the tube can be formed in the tube.

1 is a schematic front view of a grooving device according to the present invention. FIG. It is a left view which shows the casing of the grooving apparatus by this invention. It is front sectional drawing which shows the pushing-in mechanism of the grooving apparatus by this invention. 1 is a schematic left side view of a grooving device according to the present invention. FIG. 1 is a partial front view of a grooving device according to the present invention. FIG. 1 is a partial front view of a grooving device according to the present invention. FIG. It is the same front view as FIG. 6 which isolate | separated the casing and the mobile body unit. It is a right view of the grooving apparatus by this invention.

  An embodiment of a grooving device according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a grooving device 1 according to the present invention is a device for forming a circumferential groove P2 at an end P1 of a pipe P. The grooving device 1 includes a casing 2, a drive transmission mechanism 4 accommodated in the casing 2, and an electric motor 6 that is a rotational drive unit that drives the drive transmission mechanism 4.

  As shown in FIG. 2, the casing 2 has a handle 2 a for carrying the grooving device 1. The casing 2 has a moving body unit receiving portion 42 for mounting a moving body unit 30 described later.

  As shown in FIG. 1, the drive transmission mechanism 4 is constituted by a gear train (not shown), and has a rotation input shaft 4a having an axis parallel to the axial direction P3 of the tube P, and parallel to the axial direction P3 of the tube P. The rotary output shaft 4b has a simple axis.

  The electric motor 6 has a motor housing 6 a, and the rotation input shaft 4 a is an output shaft of the electric motor 6. The motor housing 6 a is attached to the casing 2 via a bearing 6 b so as to be rotatable with respect to the casing 2. An elongated motor handle 6c is attached to the motor housing 6a, and an electric cord 6d connected to a power source (not shown) for operating the electric motor 6 extends from the motor handle 6c. The motor handle 6c has a switch 6e for operating and stopping the electric motor 6.

  The grooving device further sandwiches the drive roller 8 attached to the rotary output shaft 4b so as to be able to roll with respect to the tube P along the inner surface P4 of the tube P, and the tube P so that the outer surface P5 of the tube P can be rolled. A grooved roller 10 that is pressed toward the drive roller 8 and a pressing mechanism 12 (see FIG. 2) that is attached to the casing 2 and that presses the grooved roller 10 toward the drive roller 8 are provided.

  As shown in FIG. 5, the driving roller 8 has two outer surfaces 8 a that contact the inner surface P <b> 4 of the pipe P, and an entire circumferential groove 8 b that is disposed between the outer surfaces 8 a. In order to increase the frictional force between the outer surface 8a and the pipe P, it is preferable that a notch or the like is provided. The grooving roller 10 has an all-around convex portion 10a facing the all-around groove 8b. The width of the entire circumferential convex portion 10a is determined to be smaller than the width of the entire circumferential groove 8b, and the circumferential convex portion 10a enters the circumferential groove 8b with the tube P interposed therebetween, thereby forming a groove P2 (see FIG. 1) in the tube P. Is possible.

  As shown in FIGS. 2 and 3, the pressing mechanism 12 includes a swinging member 14 that rotatably supports the grooving roller 10 about an axis 10b parallel to the axial direction P3. At the base end portion 14a, it is attached to the casing 2 so as to be swingable about an axis line 14b parallel to the axial direction P3. The pressing mechanism 12 further includes a screw member 16 that is attached to the distal end portion 14 c of the swing member 14 and swings the swing member 14. The screw member 16 has a central axis 16a, and the central axis 16a is arranged in a direction perpendicular to the axial direction P3. One end portion 16b of the screw member 16 is attached to the distal end portion 14c of the swinging member 14 so as to be rotatable about the central axis 16a and swingable about an axis 16c parallel to the axial direction P3. The other end 16d of the screw member 16 is screwed into a pivot nut 18 (see FIG. 3) attached to the casing 2 so as to be pivotable about an axis 18a parallel to the axial direction P3. A pressing handle 20 that rotates the screw member 16 in a ratchet manner is attached to one end portion 16 b of the screw member 16.

  As shown in FIGS. 1, 4 and 5, the grooving device 1 is further fixed to the pipe P and has a race ring 22 having raceway surfaces 26a and 26b, and is movable along the raceway surfaces 26a and 26b. The mobile unit 30 is detachably attached to the casing 2.

  As shown in FIG. 4, the track ring 22 is an annular member arranged over the entire circumference of the pipe P. The track ring 22 can be divided into two halves 22a and 22b, and the two halves 22a and 22b are connected by screws 22c. The diameter of the inner surface 24 of the track ring 22 is preferably slightly larger than the outer diameter of the tube P in which the groove P2 is to be formed, and preferably has a small protrusion that engages with the tube P on the inner surface. Thus, the race ring 22 can be fixed to the pipe P by tightening the screw 22c. The track ring 22 can be exchanged according to the outer diameter of the pipe P where the groove P2 is to be formed.

  As shown in FIG. 5, the cross section of the track ring 22 is convex, and the inner surface 24 on the radially inner side pressed against the outer surface P <b> 5 of the tube P, the side surface 25 on the radially inner side with the smaller width, and the width Has a wider radially outer side surface 26a, 26b and a radially outer surface 27. The radially outer side surfaces 26a and 26b are the raceway surfaces and are located in a plane perpendicular to the axial direction P3 of the pipe P. The raceway surfaces 26a and 26b are oriented in the same direction as the end surface P6 of the tube P, and are oriented in the direction opposite to the end surface P6 of the tube P and from the end surface P6 of the tube P to the first track surface. It has the 2nd track surface 26b separated from 26a.

  The moving body unit 30 includes a first moving roller 32a that is a first moving body that can move relative to the tube P along the first track surface 26a, and a tube P along the second track surface 26b. A second moving roller 32b that is a second moving body that can move relative to the first moving roller 32b, a moving body frame 34 that supports the first moving roller 32a and the second moving roller 32b, and the moving body frame 34 as a casing. 2 has a moving body unit mounting portion 36 attached to 2 and an attaching pin 37 extending from the moving body unit mounting portion 36.

  The first moving roller 32 a has a cylindrical rolling surface 38 a that rolls on the first track surface 26 a and shoulders 39 a on both sides thereof, and is rotatably supported by the moving body frame 34. The second moving roller 32a has a cylindrical rolling surface 38b that rolls on the second track surface 26b and shoulders 39b on both sides thereof, and is rotatably supported by the moving body frame 34. Thus, the first moving roller 32a and the second moving roller 32b are movable relative to the tube P over the entire circumference of the tube P. Moreover, the 1st moving roller 32a and the 2nd moving roller 32b are provided in two places in the circumferential direction P7 of the pipe | tube P (refer FIG. 4).

  Further, as shown in FIG. 5, a roller 40 that restricts the radially outward movement of the pipe P of the first moving roller 32 a and the second moving roller 32 b with respect to the track ring 22 is attached to the moving body frame 34. It has been.

  As shown in FIG. 4, the moving body frame 34 is located along a part of the circumferential direction P7 along the outer surface P5 of the pipe P. The moving body frame 34 has a bent plate shape and is located on the outer side in the radial direction with respect to the track ring 22. The movable body frame 34 is detachably attached to the movable body unit receiving portion 42 provided in the casing 2 via the two movable body unit attaching portions 36 by means of attachment pins 37 (see FIGS. 1, 6, and 7). It has been.

  The mobile unit mounting portion 36 has a tubular shape having a hole 36a. As shown in FIGS. 6 and 7, the mounting pin 37 has a large-diameter portion 37a and a small-diameter portion 37b inserted into the hole 36a and the hole 42a, and the small-diameter portion 37b is movably inserted into the hole 36a. Yes. The small-diameter portion 37b has a groove 37c near the tip, a chamfered portion 37d at the tip, and a chamfered portion 37e provided on the edge opposite to the tip of the groove 37c. The mounting pin 37 is preferably configured so that the pin urging plunger 36b provided at the hole 36a does not fall out of the movable body unit mounting portion 36 by engaging the groove 37c ( (See FIG. 7). Further, it is preferable that the mounting pin 37 is configured so that the chamfered portions 37d and 37e push the pin of the plunger 36b to be pulled in when the pin 36 is pushed into the hole 36a and the entry of the small diameter portion 37b is not hindered. .

  As shown in FIGS. 2 and 7, the moving body unit receiving portion 42 has a hole 42a that has the same diameter as the hole 36a and is aligned with the hole 36a. Therefore, the small diameter portion 37b of the mounting pin 37 can be inserted into the hole 42a. Moreover, the mobile unit receiving part 42 has a pivot lever 42c biased by a spring 42b toward the hole 42a. The tip of the pivot lever 42c is engageable with the groove 37c so as to prevent the mounting pin 37 from coming out of the hole 42a (see FIG. 6). When the mounting pin 37 is pushed into the hole 42a, the chamfered portion 37d pushes the tip end portion 42e of the pivot lever 42c so that the small diameter portion 37b is not prevented from entering (see FIG. 7). . The mobile unit receiving part 42 has a screw 42d (see FIG. 2) for fixing the mounting pin 37. The length of the small diameter portion 37b of the mounting pin 37 and the position and size of the groove 37c are preferably determined so that play is minimized when the movable body unit 30 and the casing 2 are assembled.

  A method of forming a groove in a pipe fixed to a building or the like using the described grooving apparatus will be described.

  A track ring 22 having an inner diameter suitable for the tube P in which the groove P2 is to be formed is selected and divided into two halves 22a, 22b. The two halves 22a and 22b are inserted between the moving rollers 32a and 32b of the moving body unit 30 and arranged in a ring shape, and the two halves 22a and 22b are connected by screws 22c. Thereby, the mobile unit 30 and the track ring 22 are assembled (see FIG. 4).

  Next, the track ring 22 is fixed at a predetermined distance from the end face P6 of the pipe P. Specifically, as shown in FIG. 7, when one end of the guide member 44 having a predetermined length is brought into contact with the end surface P6 of the pipe P and made a round along the end surface P of the pipe P, always, The track ring 22 is positioned by positioning the track ring 22 on the pipe P so that the other end of the guide member 44 and the radially inner side surface 25 of the track ring 22 are in contact with each other. Fix to tube P.

  Next, after the casing 2 is arranged on the pipe P so that the pipe P is sandwiched between the driving roller 8 and the grooving roller 10, the mounting pin 37 (hole 36 a) and the mobile unit receiving part 42 of the casing 2 are arranged. The holes 42a are aligned. The casing 2 is attached to the mobile unit 30 by inserting the attachment pins 37 into the holes 42 a of the mobile unit receiving part 42. Specifically, when the mounting pin 37 is inserted into the hole 42a of the moving body unit receiving portion 42, the chamfered portion 37d at the tip of the mounting pin 37 causes the tip 42e of the pivot lever 42c to be biased by the spring 42b. The mounting pin 37 is moved into the hole 42a. Thereafter, the tip of the pivot lever 42c biased by the spring 42b enters the groove 37c of the mounting pin 37 and engages with it. When the mounting pin 37 is pulled out, the tip end portion 42e of the pivot lever 42c is hooked in the groove 37c, thereby preventing the mounting pin 37 from coming off, and the casing 2 can be separated from the moving body unit 30. Is prevented (see FIG. 6). The mounting pin 37 is preferably tightened by a screw 42d. Thus, the grooving device 1 is assembled and fixed to the tube P.

  By screwing the screw member 16 into the pivot nut 18 using the pressing handle 20, the swing member 14 is swung around the axis 14 b, and the grooving roller 10 is moved toward the drive roller 8. Press on. Thereby, a dent is formed in the outer surface of the pipe P. When the electric motor 6 is operated by the switch 6e of the motor handle 6c, the drive roller 8 rotates through the drive transmission mechanism 4. Since the pipe P is fixed, the driving roller 8 moves while rolling on the inner surface P4 of the pipe P. The grooving roller 10 also moves along with the driving roller 8 while rolling on the outer surface P5 of the pipe P. Thereby, the recess of the outer surface P5 of the pipe P is continuously formed in the circumferential direction P7. When the driving roller 8 and the grooving roller 10 go around the pipe P, the electric motor 6 is stopped. As a result, a groove P2 perpendicular to the axial direction P3 of the pipe P is formed.

  Since the drive roller 8 and the grooving roller 10 are attached to the casing 2 while the groove P2 is formed, the casing 2 also makes a round along the circumference of the pipe P, that is, rotates. On the other hand, since the motor housing 6a of the electric motor 6 is rotatably attached to the casing 2, the electric motor 6 and the motor handle 6c perform translational rotation, that is, do not rotate (see FIG. 7). Since the moving rollers 32a and 32b move along the track surfaces 26a and 26b located in a plane perpendicular to the axial direction P3 of the pipe P, the moving rollers 32a and 32b move along the track surfaces 26a and 26b. While making a round of P, the direction and position of the casing 2 are restricted from being displaced with respect to the pipe P. As a result, the direction and the position of the driving roller 8 and the grooving roller 10 attached to the casing 2 are restricted from being displaced with respect to the pipe P. Specifically, the driving roller 8 and the grooving roller 10 are restricted from moving in the axial direction P3, and the direction of the driving roller 8 and the grooving roller 10 from being deviated from the direction perpendicular to the axial direction P3. Thus, the groove P2 perpendicular to the axial direction P3 of the pipe P can be accurately formed in the pipe P.

  When the depth of the groove P2 is smaller than the target depth, the screw member 16 is further screwed into the pivot nut 18 and the above operation is repeated.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims. Needless to say, these are also included within the scope of the present invention.

  In the above embodiment, the moving rollers 32a and 32b are provided at two locations in the circumferential direction P7 of the pipe P. However, if the displacement of the driving roller 8 and the grooving roller 10 can be limited, the moving rollers 32a and 32b may be provided only in one place (for example, a place near the drive roller 8 and the grooved roller 10) in the circumferential direction P7 of the pipe P, or may be provided in three or more places.

  In the above-described embodiment, the raceway member 22 has a convex cross section, and the two moving rollers 32a and 32b are arranged on both sides thereof. However, the displacement of the direction and position of the driving roller 8 and the grooving roller 10 is limited. If possible, the cross-sectional shape of the track member 22 is arbitrary, and the track surface may be one. For example, the raceway member may have a concave cross section, two raceway surfaces may be provided in the recess, and one moving roller capable of contacting the two raceway surfaces may be disposed inside the recess.

  Moreover, in the said embodiment, although the moving body which can move relatively with respect to the pipe | tube P along the track surfaces 26a and 26b was comprised by the moving rollers 32a and 32b, the track member 22 when forming the groove | channel P2. The mobile body may be a mobile body that slides along the track surfaces 26a and 26b as long as an increase in resistance between the mobile body and the mobile body is allowed.

  In the above embodiment, the roller 40 is provided. However, if it is not necessary to limit the movement of the moving rollers 32a and 32b in the circumferential direction P7, the roller 40 may not be provided. For example, when there is no need to prevent interference between the track member 22 and the moving rollers 32a and 32b, the track member 22 when the groove P2 is formed even if the track member 22 and the moving rollers 32a and 32b slightly interfere with each other. When the increase in resistance between the moving rollers 32a and 32b is allowed, the roller 40 may not be provided.

  In the above embodiment, the example in which the pipe P is fixed has been described. However, the casing 2 may be fixed, and the groove P2 may be formed by rotating the pipe P by the driving roller 8 and the grooving roller 10.

  Moreover, in the said embodiment, although the rotational drive part which drives the drive transmission mechanism 4 was the electric motor 6, you may drive the drive transmission mechanism 4 with a manual handle. When the electric motor 6 is adopted, the electric motor 6 and the motor handle 6c perform a translational circular motion while the casing 2 makes a round along the pipe P, and the work space is larger than when the electric motor 6 and the motor handle 6c make a round. Can be small. On the other hand, if it is not necessary to reduce the working space, a manual handle may be used instead of the electric motor 6.

DESCRIPTION OF SYMBOLS 1 Grooving apparatus 2 Casing 4 Drive transmission mechanism 4b Rotation output shaft 6 Electric motor (rotation drive part)
6a Motor housing 6c Motor handle 8 Driving roller 8a Groove roller 10 Grooving roller 10a Groove protrusion 12 Pressing device 22 Track ring 26a First track surface 26b Second track surface 30 Moving body unit 32a First moving roller (moving) body)
32b Second moving roller (moving body)
37 mounting pin 37c groove 37d chamfered portion 40 roller 42a hole 42c pivot lever (lever member)
42e Tip P Pipe P1 End P2 Groove P3 Axial direction P4 Inner surface P5 Outer surface P6 End surface P7 Circumferential direction

Claims (6)

A grooving device for forming a circumferential groove at an end of a pipe,
A casing,
A drive transmission mechanism housed in the casing and having a rotation output portion having an axis parallel to the axial direction of the pipe;
A rotational drive unit for driving the drive transmission mechanism;
A driving roller attached to the rotary output unit so as to be able to roll with respect to the pipe along the inner surface of the pipe,
A grooved roller that is pressed against the drive roller across the tube so that the outer surface of the tube can be rolled, and has a circumferential protrusion facing the circumferential groove;
A pressing mechanism attached to the casing and pressing the grooving roller toward the drive roller;
A track ring fixed to the tube and having a track surface located in a plane perpendicular to the axial direction of the tube;
A moving body attached to the casing so as to be movable relative to the pipe along the track surface along the entire circumference of the pipe, and the moving body deviates the orientation and position of the grooving roller with respect to the pipe. Limit that,
The movable body is provided in a movable body unit, and the movable body unit and the casing are detachably attached to each other. The movable body unit includes a mounting pin including a groove and a tip chamfered portion. A hole for receiving the mounting pin, and a lever member biased toward the groove of the mounting pin received in the hole, and when the mounting pin is inserted into the hole, the tip chamfered portion is the lever. is moved against the member to the biasing is advanced through the hole of the mounting pin, after the lever member is engaged with the groove, the lever member is Rukoto impede exit of the mounting pin A grooving device.   The grooving apparatus according to claim 1, wherein the moving body is provided in at least two places in a circumferential direction of the pipe. The track surface has a first track surface oriented in the same direction as the end surface of the tube, and a second track oriented in the opposite direction to the tube end surface and away from the tube end surface than the first track surface. Has a surface,
The moving body includes a first moving body that can move relative to the tube along the first track surface, and a second movement that can move relative to the tube along the second track surface. The grooving device according to claim 1, wherein the grooving device has a body.   The grooving apparatus according to any one of claims 1 to 3, wherein the movable body includes a movable roller that can roll along the raceway surface.   The groove according to any one of claims 1 to 4, further comprising a roller attached to restrict the radially outward movement of the tube of the moving body with respect to the track ring. Attachment device. The rotation driving unit includes an electric motor having a housing, said housing is attached to a rotatable said casing relative to said casing, according to claim 1 to 5, characterized in that the handle is provided in the housing The grooving device according to any one of the above.

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