JPH11300520A - Electric pipe cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact electric cutter capable of smoothly and correctly cutting a pipe. SOLUTION: An electric pipe cutter comprises a pipe holding part to horizontally support a pipe P on a base 1, and a cutter operation part provided with a disk blade 5 to be driven by a prime mover part 7 in a cutting manner orthogonal to the supported pipe. The pipe holding part turnably loads the pipe P through a support roller 27 group. In a cutter operation part B, the prime mover part 7 attached to an operation rod 4 is pivotably supported on the base 1, a reverse-driven rubber wheel 8 with a rubber ring 8c of the diameter slightly larger than that of the disk blade 5 fitted to the outer circumference is fitted to a prime mover shaft 6 through a bearing 9 on the inner side of the disk blade 5 fixed to the prime mover shaft 6, an inner cylindrical wall surface 8a is formed on the reverse-driven rubber wheel 8, a planetary wheel 10 is interposed between the inner cylindrical wall surface 8a and an outer surface 6a of the prime mover shaft 6, the planetary wheel 10 is pivotably attached to an inserted shaft support wheel 14 through a bearing 15, and a brake mechanism to be controlled by a brake lever 21 is provided on the shaft support wheel 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric cutter for cutting a pipe made of metal, resin, or the like into a ring by using a disk blade.

[0002]

2. Description of the Related Art There has been provided an electric cutter for cutting a pipe or the like by rotating a disk blade. When cutting a pipe with a conventional electric cutter, for example, in the case of a disk blade having a diameter of about twice the diameter of the pipe, it is not possible to further cut further because the shaft portion fixing the disk blade hits the pipe. Can not. For this purpose, a disk blade having a diameter as large as about three times the diameter of the pipe is actually used. If the disk blade is large, the movement, operation and storage of the device are very inconvenient.

If the diameter of the pipe is large and the diameter of the disk blade is less than about twice the diameter of the pipe, the pipe cannot be cut at a stroke. Is repeated several times. Then, the cut surface between the first partial cut surface and the second partial cut and the surface is “shifted”, and a step is generated. If the cut surface of the pipe is not accurate, a step gap will be generated even if the pipes are connected to each other, causing liquid leakage or gas leakage.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a compact electric cutter capable of easily and accurately cutting a cut surface of a pipe.

[0005]

In order to solve the above-mentioned problems, the present invention relates to a disk holder driven by a driving unit and a pipe gripper A for supporting a pipe P in a constant horizontal direction on a base plate 1. An electric pipe cutter comprising a cutter operating section B provided so that a cutting edge 5a of the blade 5 can be cut in a direction orthogonal to a pipe P supported by the pipe gripping section A.

The pipe gripping section A is provided with a pipe gripping mechanism 22 that rotatably mounts the circumference of the pipe P across the base 1 via a group of support rollers 27. You.

The cutter operating portion B pivotally supports a driving portion 7 integrally attached to the operating rod 4 to the pivot portion 2 on the base 1 via the pivot 3, and the driving shaft of the driving portion 7. A disk wheel 5 is fixed to one outer end of one side 6 and a reverse rubber wheel 8 in which a rubber ring 8c having a diameter slightly larger than that of the disk blade 5 is fitted inside the disk blade 5 is attached to the driving shaft 6. A concentric inner cylinder wall surface 8a, which is mounted via a bearing 9 and is opened inward on the inner periphery of the reversing rubber wheel 8, is formed with the inner cylinder wall surface 8a and the driving shaft 6
One or more planetary wheels 10 are interposed between the outer surface 6a of the
And the planetary wheel 10 is mounted on the inner cylindrical wall 8 on the driving shaft 6.
a into a shaft support wheel 14 which is inserted through a bearing 15 through a
The axle 12 of the planetary wheel 10 is mounted on the shaft, and its shaft support wheel 14
And a brake mechanism 17 that is controlled by a brake lever 21 attached to the operating rod 4.

In the above construction, the pipe gripping mechanism 22 is provided with a pair of front and rear support members in the circumferential direction having an interval shorter than the diameter of the pipe P to be gripped at two locations having an interval in the length direction of the pipe P. Rollers 27, 28, 29, 3
An arm 31 is provided so as to rotate in the circumferential direction of the pipe P, and is urged downward by an elastic body 32 and opened and closed vertically above one of the support rollers 27 and 28. And a pressure roller is attached to the arm 31.
The rotary shaft 34 is provided so as to rotate in the circumferential direction of the pipe P.

Further, in the above construction, the brake mechanism 17 includes a brake drum 18 concentric with the shaft support wheel 14.
The brake drum 18 is fixed to the brake drum 18.
9 and the relaxation of the brake 19
The control lever 4 is provided with a brake lever 21 which is controlled via the control lever 20.

Further, in the above construction, a rubber O-ring 11 is fitted around the planetary wheel 10 and the rubber O-ring 11 is pressed against the inner cylinder wall surface 8a of the reverse rotation rubber wheel 8 and the outer surface 6a of the driving shaft 6. It is made to intervene in the wearing state.

Further, in the above structure, the shaft 33 of the pressure roller 34 can be slightly moved up and down, and the shaft 33 is urged downward by the elastic body 37 to change the diameter of the pipe P. It is designed to respond to errors.

Further, in the above configuration, a safety cover 38 for covering the disk blade 5 is provided detachably on the driving unit 7 main body.

Further, in the above construction, a rail 42 is provided on the base 1 in the same direction as the pipe P, and a group of support rollers is mounted on the shaft supports 40 and 41, respectively. The shaft supports 40 and 41 can be slid and fixed by adjusting bolts 44 on the shaft 42.

Further, in the above configuration, a long hole 45 is formed in the surface of the base plate 1 and a bolt hole 4 is formed on the long hole 45.
3, a bolt hole 43 and the long hole 45 are communicated with each other, and an adjusting bolt 46 for tightening and fixing the bolt hole 43 is provided.

Further, in the above configuration, when the outer peripheral surface 8b of the rubber ring 8c of the reverse rubber wheel 8 comes into contact with the pipe P or when the operating rod 4 is located forward of the set angle, the power supply of the driving unit 7 is energized. An automatic switch 48 is provided.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings showing examples. In the present invention, as shown in FIGS. 1 and 2, a pipe gripper A for supporting a pipe P in a constant horizontal direction and a cutting edge 5 a of a disk blade 5 driven by a driving unit 7 are provided on the base 1. An electric pipe cutter comprising a cutter operating section B provided so as to be able to cut in a direction perpendicular to a pipe P supported by a pipe gripping section A.

The pipe gripping section A is provided with a pipe gripping mechanism 22 for gripping the pipe P in a freely rotatable manner by a plurality of support rollers 27, 28, 29 and 30. As shown in FIG. 1, the pipe gripping mechanism 22 is provided with a rail 42 on the base 1 in the same direction as the pipe P, and slides the shaft supports 40, 41 on the rail 42. And can be fixed by adjusting bolts 44, and supporting rollers 27, 28, 29, 30 are mounted on their shaft supports 40, 41 on their shafts 23, 2.
At 4, 25 and 26, the shaft is attached.

The position at which the cutting edge 5a of the disk blade 5 abuts on the pipe P is intermediate between the positions of the support rollers 27, 28, 29 and 30 and when the pipe P is short. In some cases, the pipe P may be pushed downward by the reversing rubber wheel 8, but the supporting rollers 27, 28
In the case where the pipe P is located outside the position, the pipe P is held in the fixed direction until the end, and the pipe P is accurately cut off. Therefore, when the pipe P is short, it is preferable that the shaft supports 40 and 41 be slid so that the position where the cutting edge 5a of the disk blade 5 hits the outer side.

Further, as shown in FIG.
To move the positions 27, 28, 29 and 30, a long hole 45 is formed in the base plate 1 in the vertical direction, and a rail 42 having a bolt hole 43 is arranged on the long hole 45. Bolt hole 43
When the adjusting bolts 46 for tightening and fixing them are penetrated, the support rollers 27, 28, 29, 30 can be moved at one time by the movement along the long holes 45. it can. In addition, the movement in the front-back direction along the long hole 45 is as follows.
The position of the pipe P can be moved and fixed to an optimum position where the cutting edge 5a of the disk blade 5 is cut in accordance with the diameter of the pipe P.

As shown in FIG. 7, the cutting edge 5 of the disc blade 5 is
It is preferable that the straight line connecting the position a and the contact positions of the support rollers 27 and 29 be set above the center of the pipe P. Then the pipe P
When the side of the pipe is pressed, the pipe P is supported by the supporting roller-2.
It can be gripped by being supported by 7, 29 so as not to be pushed out.

As shown in FIG. 3, the cutter operating portion B is provided with a driving portion 7 integrally attached to an intermediate portion of an operating rod 4 having a grip 4a at a distal end portion. 2
And the cutting edge 5a of the disk blade 5 driven by the driving unit 7 by operating the operating rod 3 by the operation of the operating rod 3 is orthogonal to the pipe P supported by the pipe holding unit A. Be able to cut in the direction The drive shaft 6 of the drive unit 7
A reversible rubber wheel 8 having a disk blade 5 exchangeably fixed to an outer end portion thereof with a fixing bolt 16 and a rubber ring 8c slightly larger in diameter than the disk blade 5 fitted inside the disk blade 5 on the outer periphery thereof.
Is mounted on the driving shaft 6 via a bearing 9.

A concentric inner cylinder wall surface 8a which is opened inward is formed on the inner periphery of the reversing rubber wheel 8, and three planetary wheels 10 are provided between the inner cylinder wall surface 8a and the outer surface 6a of the driving shaft 6. Intervene. A rubber O-ring 11 is fitted around the outer periphery of each of the planetary wheels 10, and the rubber O-ring 11 is interposed in a press-contact state on the inner cylinder wall surface 8 a of the reverse rotation rubber wheel 8 and the outer surface 6 a of the driving shaft 6. A bearing 13 is provided between the planetary wheel 10 and a shaft support wheel 14 which is attached via a bearing 15 with the planetary wheel 10 facing the inner cylinder wall surface 8 a on the driving shaft 6.
Are attached via an axle 12 interposed therebetween. And FIG.
As shown in FIG. 5 and FIG.
And a brake mechanism 17 that is controlled by a brake lever 21 attached thereto through a wire 20.

As shown in FIGS. 4 and 5, the brake mechanism 17 has a concentric brake drum 18 fixedly mounted on the shaft support wheel 14, and a brake 19 on the brake drum 18. The operating lever 4 is provided with a brake lever 21 for winding and controlling the relaxation of the brake 19 via a wire 20. Since the brake mechanism 17 only needs to be able to perform brake control on the shaft support wheel 14, various modes other than those described above are possible.

When the brake lever 21 is pulled, the brake 19 is tightened and the brake drum 1 is pulled.
8, the revolution of the planetary wheel 10 is delayed or stopped by the rotation delay or stop of the shaft support wheel 14.
Then, as shown in FIG. 6, the planetary wheel 10 starts rotating in the reverse direction with respect to the driving shaft 6 due to the frictional resistance of the rubber O-ring 11. When the planetary wheel 10 rotates, the reverse rotation rubber wheel 8 also starts to rotate in the reverse direction with respect to the driving shaft 6 due to frictional resistance of the rubber O-ring 11 against the inner cylinder wall surface 8a. That is, the pipe P pressed against the outer peripheral surface 8b of the rubber wheel 8c of the reverse rubber wheel 8 rotates in a direction opposite to the rotation direction of the disk blade 5.

The planetary wheel 10 has a rubber O-ring 11
In this embodiment, the reverse rubber wheels 8 are operated by being mutually transmitted by frictional resistance.
In the above cutting, the frictional force of the rubber O-ring 11 does not provide a sufficient resistance, causing the rubber to slip and become incapable of cutting, and if it continues as it is, the rubber may be burned off due to frictional heat and other troubles may occur. Therefore, when cutting a hard pipe P made of metal, the contact surfaces (the planetary wheel 10 and the inner cylinder wall surface 8) are required to obtain a sufficient transmission force of the planetary wheel 10.
It is preferable to form a gear (not shown) that meshes with the a and the outer surface 6a) of the driving shaft 6 so that the rotation can be reliably transmitted.

As shown in FIG. 1, the pipe gripping mechanism 22 is provided at two places spaced apart in the longitudinal direction of the pipe P, as shown in FIG. A pair of front and rear support rollers-2 in the circumferential direction having an interval
7, 28, 29, 30 are provided so as to rotate freely in the circumferential direction in accordance with the rotation of the pipe P, and an elastic body 32 is provided above one of the support rollers 27, 28.
Arm 3 urges downward and opens and closes vertically
The pressure roller 34 is provided on the arm 31 so as to rotate in the circumferential direction in accordance with the rotation of the pipe P.

In FIG. 8, the elastic body 32 has a leaf spring 32a.
Is shown, and a pivot 51 provided on the arm 31 is shown.
The convex portion 50 provided on the outer side is pressed by the leaf spring 32a to urge the arm 31 downward.
In this case, since the arm 31 can stand still in an upright state, it is easy to set the pipe P.

Also, as shown in FIG.
Has a finger hook 47 at its distal end 31b, and its proximal end 31a
Are pivotally supported by a pivot 51 provided integrally with the mounting base 35 of the support rollers 27 and 28, and the arm 31 is urged downward from the elastic body 32 and the arm 31 is Pivot 5
1 is opened and closed up and down with the fulcrum.

Further, the shaft 33 of the pressure roller 34 can be slightly moved up and down, and the shaft 33 is urged downward by the elastic body 37 so that it can respond to the deformation error of the diameter of the pipe P. It is like that. Further, the pipe P is not a true circle but has a deformation error. To cope with the minute error, as shown in FIGS. 9 and 10, the shaft 33 of the pressure roller 34 can be slightly moved up and down, and the shaft 33 is attached downward by an elastic body 37. Momentum,
It is possible to follow the deformation error of the diameter of the pipe P.

The elastic body 37 includes a leaf spring 37a.
(Shown in FIG. 9) and a coil spring 37b (shown in FIG. 10) can be used. FIG. 9 shows an embodiment of a leaf spring 37a, in which a movable shaft 52 provided with a pressure roller 34 is connected to an arm 3.
1 and pivotally attached to a pivot 51 provided in the
Is pressed by the leaf spring 37a, and due to a deformation error of the diameter of the pipe P, the pressure roller is pressed.
When the upper portion 34 is pushed upward and moved, the convex portion 49 of the corner of the movable shaft 52 is pushed by the leaf spring 37a, and the pressure roller 3 is pressed.
4 is urged downward.

As shown in FIG. 3, in order to prevent an accident during the operation, a safety cover 38 for covering the disk blade 5, which is dangerous when touched, is provided on the driving unit 7 body in a detachable manner. Since the safety cover 38 may hinder the replacement of the disk blade 5, a screw fixing portion is provided in the driving portion 7 body, and a fixing screw 39 is provided in a screw hole provided in the safety cover 38 in the screw fixing portion. It can be mounted and removed by screwing.

Further, a rail 42 is provided on the base 1 in the same direction as the pipe P, and the support rollers 27, 2 are provided.
8, 29 and 30 are respectively mounted on shaft supports 40 and 41 so that the shaft supports 40 and 41 can be slid on the rails 42 and fixed by bolts 44.

Further, a long hole 45 is formed in the surface of the base plate 1,
A rail 42 having a screw hole 43 is arranged on the long hole 45, and the screw hole 43 and the long hole 45 are communicated with each other, and an adjusting bolt 46 for tightening and fixing the two is provided.

Further, there is provided an automatic switch 48 for energizing the power source of the driving unit 7 when the outer peripheral surface 8b of the rubber ring 8c of the reverse rubber wheel 8 comes into contact with the pipe P or when the operating rod 4 is located forward of the set angle. . By doing so, wasteful power consumption at a position where it does not work for pipe cutting can be eliminated, and unnecessary safety of the disk blade 5 can be prevented, so that safety can be enhanced.

[0035]

The method of use of the present invention is as follows. First, the operating rod 4 is operated backward to open the front of the disk blade 5 so that the pipe P to be cut can be easily attached to the pipe holding portion A. . Then, the finger hook 4 at the tip of the arm 31 of the pipe gripping section A
7, the pressure roller 34 is raised, the upper part is opened, and the pipes P are placed on a plurality of support rollers 27, 28, 29, 30.
Is placed. Next, the pressure roller 34 is lowered and the pipe P
Is gripped.

Then, as shown in FIG. 2, the operating rod 4 is operated in the forward direction so that the cutting edge 5a of the disk blade 5 is brought into contact with the outer peripheral surface of the pipe P. Then, the rubber ring 8c of the reverse rubber wheel 8
Since the outer peripheral surface 8b is slightly larger in diameter than the disk blade 5, the outer peripheral surface 8b comes into contact with the outer peripheral surface of the pipe P first, the automatic switch 48 works, the power of the driving unit 7 is turned on, and the rotation of the driving shaft 6 of the driving unit 7 causes the disk. The blade 5 rotates. In this state, when the disk blade 5 comes into contact with the outer peripheral surface of the pipe P and rotates, the rotation of the disk blade 5 is followed by the rotation of the pipe P. The car 8 is also configured to rotate simultaneously with the rotation of the pipe P. However, actually, the rotation of the pipe P cannot be obtained as desired with the rotational force of the disk blade 5.

When the brake lever 21 is pulled in a state where the outer peripheral surface 8b of the rubber ring 8c of the reverse rubber wheel 8 is in contact with the pipe P, as shown in FIG. The brake 19 tightens the brake drum 18, and the brake works on the shaft support wheel 14. At that time,
The rotation of the shaft support wheel 14 is delayed or stopped due to the pulling / pulling of the brake lever-21. And, as shown in FIG.
When the revolution of the planetary vehicle 10 is delayed or stopped, the frictional resistance of the rubber O-ring 11 causes the rotation of the driving shaft 5 to be transmitted to the planetary vehicle 10, and the rotation of the driving shaft 5 starts to rotate in the reverse direction.

Further, due to the rotation of the planetary wheel 10, the reverse rubber wheel 8 also starts to rotate in the reverse direction with respect to the driving shaft 5 due to the frictional resistance of the rubber O-ring 11 against the inner cylinder wall surface 8 a. As a result, the pipe P pressed against the outer peripheral surface 8b of the rubber ring 8c of the reverse rubber wheel 8 has a direction opposite to the rotation direction of the disk blade 5 (a direction in which the pipe P is opposed to the rotation direction of the cutting edge 5a of the disk blade 5). To rotate. By performing the brake control of the brake mechanism 17 while adjusting the pipe P in this manner, when the pipe P is rotated once at a constant speed, the cutting by the disk blade 5 is completed, and the pipe P is separated.

[0039]

The present invention is as described above. The pipe P is placed on the supporting rollers 27, 28, 29 and 30 and the pipe P is pressed by the pressure roller 34 on the one hand. The run-out is reliably suppressed, and on the other hand, it is suppressed by the reverse rubber wheel 8. Then, the pipe P is shaken in the direction against the rotation of the disk blade 5 by the reversing rubber wheel 8 while the pipe P is stably held down by both.
It is rotated by the operation of the cutter 21, and the rotation causes the cutting edge 5 a of the disk blade 5 to cut and advance the outer peripheral surface of the pipe P. At this time, each support roller 27, 28, 29, 30
The pressure roller 34 rotates in the circumferential direction while supporting the pipe P in a constant horizontal direction, so that when the pipe P makes one rotation, it returns to the original position accurately. That is, since the position of the cutting edge 5a of the disk blade 5 at the cutting start point of the pipe P and the cutting point exactly match, the occurrence of a cut edge step can be avoided.

In the past, cutting could only be performed with a disk blade having a diameter approximately three times larger than the diameter of the pipe P. However, in the present invention, since the pipe P is rotated and cut, the disk blade 5 is cut. Can be made smaller than the diameter of the pipe P, so that the entire apparatus can be made more compact and lighter.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a side view showing a use state.

FIG. 3 is a side view of the inverted rubber wheel, the disk blade, and the driving shaft of the present invention in a vertical view.

FIG. 4 is a longitudinal sectional side view showing essential parts of a reverse rubber wheel, a disk blade, and a driving shaft.

FIG. 5 is a side view showing a main part of the reverse rotation rubber wheel including a brake drum portion.

FIG. 6 is a schematic side view showing a state in which a reverse rubber wheel portion reverses.

FIG. 7 is a schematic side view showing a mutual positional relationship between a disk blade, a support roller, and the center of the pipe with respect to the pipe.

FIG. 8 is a side view showing a state in which an arm to which a pressure roller is attached is opened and closed up and down.

FIG. 9 is a side view showing a main part of a pressure roller using a leaf spring.

FIG. 10 is a side view showing a main part of a pressure roller using a coil spring.

[Explanation of symbols]

 Reference Signs List 1 base 2 pivot 3 pivot 4 operating rod 4a grip of operating rod 5 disk blade 5a blade edge of disk blade 6 driving shaft 6a outer surface of driving shaft 7 driving unit 8 reversing rubber wheel 8a inner cylinder wall surface of reversing rubber wheel 8b reversing rubber Outer peripheral surface of rubber wheel of car 8c Rubber ring of reverse rubber wheel 9 Bearing 10 Planetary wheel 11 Rubber O-ring 12 Planetary wheel axle 13 Bearing 14 Planetary wheel shaft support wheel 15 Bearing 16 Disk blade fixing bolt 17 Brake Mechanism 18 brake drum 19 brake 20 wire 21 brake lever 22 pipe gripping mechanism 23 shaft of support roller 24 shaft of support roller 25 shaft of support roller 26 support roller Roller shaft 27 Support roller 28 Support roller 29 Support roller 30 Support roller 31 Arm 31a Base end of arm 31b Tip of arm 3 Elastic body 32a Leaf spring 33 Pressure roller shaft 34 Pressure roller 35 Mounting base 36 Pivot 37 Elastic body 37a Leaf spring 37b Coil spring 38 Safety cover 39 Safety cover fixing screw 40 Shaft support 41 Roller Shaft Support 42 Rail 43 Bolt Hole 44 Adjustment Bolt 45 Slot 46 Adjustment Bolt 47 Finger Hook 48 Automatic Switch 49 Convex 50 Convex 51 Pivot 52 Movable Shaft P Pipe A Pipe Hold B Cutter operation unit

Claims (9)

[Claims] 1. A table grip (1) for supporting a pipe (P) in a constant horizontal direction on a base (1), and a cutting edge (5a) of a disk blade (5) driven by a driving unit (7). ) Comprises a cutter operating section (B) provided so as to be able to cut in a direction perpendicular to the pipe (P) supported by the pipe gripping section (A), and the pipe gripping section (A) A pipe gripping mechanism (22) for rotatably mounting the circumference of the pipe (P) across the board (1) via a group of support rollers is provided, and the cutter operating section (B) A driving part (7) integrally attached to the operating rod (4) is pivotally supported on a pivot (2) on the base (1) via a pivot (3), and the driving part (7) is A disk blade (5) is fixed to one outer end of the driving shaft (6), and a rubber ring (8c) having a diameter slightly larger than that of the disk blade (5) is provided inside the disk blade (5). Reversing rubber wheel (8)
Is mounted on the driving shaft (6) via a bearing (9), and a concentric inner cylinder wall surface (8a) opened inward is formed on the inner periphery of the reversing rubber wheel (8). 8a) and one or more planet wheels (10) between the outer surface (6a) of the driving shaft (6), and the planet wheels (10) being connected to the inner cylinder on the driving shaft (6). The pivot (12) of the planetary wheel (10) is mounted on a shaft support wheel (14) which is inserted through a bearing (15) to a wall surface (8a), and the operating rod is mounted on the shaft support wheel (14). Braking lever attached to (4)
The brake mechanism (1) controlled by the brake (21)
An electric pipe cutter provided with 7). 2. A pipe gripping mechanism (22) is provided at two locations spaced apart in the length direction of the pipe (P), and a pair of front and rear circumferentially spaced apart from each other in a diameter smaller than the diameter of the pipe (P) to be gripped. Support rollers (27), (28), (29),
(30) are provided so as to rotate in the circumferential direction of the pipe (P), and one of the support rollers (27),
An arm (31) which is urged downward by an elastic body (32) and opens and closes up and down is provided above (28),
A pressure roller (34) is provided on the arm (31) so as to rotate in the circumferential direction of the pipe (P).
The described electric pipe cutter. 3. The brake mechanism (17) includes a shaft support wheel (1).
A concentric brake drum (18) is fixed to 4), a brake (19) is wound around the brake drum (18), and the brake (19) is relaxed by a wire ( 2
The electric pipe cutter according to claim 1 or 2, wherein a brake lever (21) controlled via the control lever (0) is attached to the operating rod (4). 4. A rubber O-ring (11) is fitted around the outer periphery of the planetary wheel (10) and the inner cylindrical wall surface (8a) of the reverse rubber wheel (8) is provided.
And a rubber O-ring (1) on the outer surface (6a) of the driving shaft (6).
The electric pipe cutter according to any one of claims 1 to 3, wherein 1) is interposed in a press-contact state. 5. The pressure roller (34) has a shaft (33) movable slightly up and down, and the shaft (33) is urged downward by an elastic body (37) to form a pipe (P). The electric pipe cutter according to any one of claims 1 to 4, wherein the electric pipe cutter can respond to a deformation error of the diameter of the pipe. 6. A safety cover (38) for covering the disk blade (5).
The electric pipe cutter according to any one of claims 1 to 5, wherein the power pipe (7) is detachably provided on the driving unit (7) body. 7. A rail (42) is provided on a platform (1) in the same direction as a pipe (P), and a support roller group is mounted on shaft supports (40) and (41), respectively. 7. The apparatus according to claim 1, wherein said shaft supports (40), (41) can be slid and fixed on said rails (42) by adjusting bolts (44). The electric pipe cutter described in the section. 8. An elongated hole (45) is formed in the surface of the base (1),
A rail (42) having a bolt hole (43) is arranged on the long hole (45), the bolt hole (43) communicates with the long hole (45), and both are tightened and fixed. The electric pipe cutter according to any one of claims 1 to 7, wherein a bolt (46) is penetrated. 9. When the outer peripheral surface (8b) of the rubber ring (8c) of the reverse rubber wheel (8) comes into contact with the pipe (P) or when the operating rod (4) is located forward of the set angle, the prime mover (7). The electric pipe cutter according to any one of claims 1 to 8, further comprising an automatic switch (48) for energizing the power supply of (1).