JP3437628B2 - Cutting device, its gripping mechanism and its drive unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting the peripheral surface of a pipe to be cut made of resin, a gripping mechanism for the cutting device, and a drive unit.

[0002]

2. Description of the Related Art In recent years, synthetic resin pipes have been used for gas pipes and the like, and the connection method between the gas pipes is different from that for metal pipes. For example, when branching a resin pipe to another resin pipe, as shown in FIG. 18, the following method has been proposed. That is, the inner peripheral surface of the half-split pipe 70a integrally provided at the tip of the first resin pipe 70 and the outer peripheral surface of the second resin pipe 71 are brought into contact with each other. In this state, the heating wire 72 embedded in the half-split tube 70a of the first resin tube 70 is energized via the plus and minus electrodes 73 and 74.
Due to this energization, the heating wire 72 generates heat, and the half-split pipe 70a
The resin on the inner peripheral surface of and the resin on the outer peripheral surface of the second resin pipe 71 is melted out, and the two 70, 71 are connected.

By the way, the first and second resin pipes 70, 71
In order to satisfactorily perform the joining of No. 2, a hand plane or the like is used as a pre-welding treatment for both 70 and 71, and the outer peripheral surface of the second resin pipe 71, which is the joint welding point, is cut.

[0004]

However, it is difficult to uniformly cut the second resin pipe 71 by the above-mentioned manual cutting method in the field work such as on the road.
For this reason, the cutting surface of the second resin pipe 71 may be roughly cut, which may result in poor welding of the first and second resin pipes 70 and 71.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and an object thereof is a cutting device capable of uniformly cutting the peripheral surface of a pipe to be cut. And a gripping mechanism thereof and a drive unit.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a first chuck and a second chuck which cooperate with each other to rotatably grip a pipe to be cut. A hinge that connects the two to each other so as to be swingable is provided, and a lock mechanism that locks the pipe to be cut in a grasping state is provided at the tip of both chucks, and at least one of the first chuck and the second chuck is provided. A cutting means for cutting the peripheral surface of the pipe to be cut by the relative rotation of both chucks and the pipe to be cut is provided on one side of the first chuck and the second chuck.
The inner peripheral surface of the shaft extends in the same direction as the central axes of both chucks.
A plurality of rollers that rotate around
At least one of the rollers is
Equipped with urging means to press the pipe to be cut in the radial direction of the two chucks.
The gist is that the gripping mechanism is a swing roller .

The invention according to claim 2 is the grip according to claim 1.
In the mechanism, the cutting means is biased by an elastic body
Insert the pipe to be cut in the radial direction of the first and second chucks.
It is provided so as to press the elastic body, and the pressing force of the elastic body is
The point is that it is weaker than the pressing force of the urging means of the ing roller.
To do. According to a third aspect of the present invention, a drive wheel that is rotatably supported with respect to the frame and abuts and engages with the peripheral surfaces of both chucks of the gripping mechanism to roll both chucks in the gripped state, and the frame. And a torque transmission mechanism for transmitting torque from a driving part to the drive wheel, and a torque transmission mechanism opposed to the drive wheel with a chuck interposed therebetween. The chucks can be attached to and detached from the drive wheel. A gist of the present invention is to provide a drive unit that includes an opposed wheel that is sandwiched and that cooperates with a drive wheel to rotatably support a chuck.

According to a fourth aspect of the present invention, a hinge is provided at the base end portions of the first chuck and the second chuck that cooperate with each other to rotatably hold the pipe to be cut, and swingably connect the both. And a lock mechanism that is provided at the tip of both chucks and locks the pipe to be cut in a gripped state, and at least one of the two chucks, which is provided by the relative rotation of both chucks and the pipe to be cut. A gripping mechanism provided with a cutting means for cutting the peripheral surface of the cutting tube, and a chucking state which is rotatably supported with respect to the frame and abuts and engages with the peripheral surfaces of both chucks of the gripping mechanism. A drive wheel that rolls the drive wheel, a torque transmission mechanism that is provided in the frame and that transmits a torque from a driving part to the drive wheel, and a drive wheel that is disposed opposite to the drive wheel with a chuck interposed therebetween. Between the two With click is capable KyoIri detachable, and summarized in that in cooperation with the driving wheel is a cutting device comprising a counter wheel rotatably supporting the chuck.

According to a fifth aspect of the present invention, in the cutting device according to the fourth aspect, at least one cleaning means for cleaning the drive wheels and the abutting engagement surfaces of the first and second chucks is provided on the frame. The main point is that.

The invention according to claim 6 is the invention according to claim 4 or 5.
In the cutting device according to any one of the above, a plurality of rollers that rotate about an axis extending in substantially the same direction as the central axes of both chucks are attached to the inner peripheral surfaces of the first chuck and the second chuck, and At least one of the rollers is a swing roller having a biasing means for pressing the pipe to be cut in the radial direction of the first chuck and the second chuck.

The invention according to claim 7 is the invention according to claims 4 to 6.
In the cutting device according to any one of the above, the cutting means is provided so as to be urged by an elastic body to press the pipe to be cut in a radial direction of the first chuck and the second chuck,
The gist is that the pressing force of the elastic body is weaker than the pressing force of the biasing means of the swing roller.

According to an eighth aspect of the present invention, in the cutting device according to any one of the fourth to seventh aspects, at least one of the first chuck and the second chuck has a tip portion from which the tip portion is chucked. The gist of the present invention is to provide a guide plate that protrudes in the circumferential direction and that restricts the tip ends of the first chuck and the second chuck so that they cannot move in the same direction as the central axis.

According to a ninth aspect of the present invention, in the drive unit according to the third aspect, a counter roller rotatably supported with respect to the frame and abutting against outer peripheral surfaces of both chucks of the gripping mechanism is provided. Is the gist.

[0014]

Therefore, according to the first aspect of the invention, the tips of the first and second chucks are opened around the hinges at the base ends thereof. In that state, the first or second chuck is sandwiched between the drive wheel and the opposing wheel. The pipe to be cut is held between the first and second chucks, and the tips of both chucks are locked in the joined state by the lock mechanism. That is, both chucks and the pipe to be cut are held relatively rotatable by the holding mechanism. Also, the pipe to be cut is pressed by the swing roller.
Therefore, even if the pipe to be cut is slightly deformed, it is urged by the elastic body.
The cutting means follows according to the deformation and the cutting circumference of the pipe to be cut.
The surface is surely cut. According to the invention of claim 2, the swing
Pressing force that urges the cutting means from pressing force that urges the grawler
Since the force is weaker, the pipe to be cut was clamped by both chucks.
In this condition, make sure that the pipe to be cut is pressed against the cutting means.
It

According to the third aspect of the present invention, the motive force from the prime mover is transmitted to the drive wheels via the torque transmission mechanism. Along with the rotation of the drive wheel, the gripping mechanism and the pipe to be cut are relatively rotated by the frictional force between the chucks of the drive wheel and the gripping mechanism, and the peripheral surface of the pipe to be cut is cut by the cutting means. According to the invention of claim 4, the first and second chucks
Open their tips around the hinge at the proximal end.
In that state, drive the first or second chuck to the drive wheel and face it.
Insert it between the wheels. Cut between the first and second chucks
Hold the tube and join the tips of both chucks with the lock mechanism.
Lock to state. In other words, the gripping mechanism allows both
And the pipe to be cut are held so as to be rotatable relative to each other. Also,
The motive force from the prime mover is transmitted to the drive wheels via the torque transmission mechanism.
Transmitted. As the drive wheel rotates, the drive wheel and gripper
The gripping mechanism and the object
The cutting pipe is rotated relative to the circumference of the pipe to be cut by the cutting means.
The surface is cut. Further, according to the invention of claim 5 , since the contact surface of the gripping mechanism is cleaned by the cleaning means, the frictional force of the drive wheel and the peripheral flange is always kept in a good state.
Therefore, it is possible to prevent the driving efficiency of the driving mechanism from the driving wheel from being lowered.

According to the sixth aspect of the invention, since the pipe to be cut is pressed by the swing roller, the cutting means urged by the elastic body follows the deformation even if the pipe to be cut is slightly deformed. However, the cutting peripheral surface of the pipe to be cut is surely cut.

Further, according to the invention of claim 7 , the pressing force for urging the cutting means is weaker than the pressing force for urging the swing roller. Therefore, when the pipe to be cut is clamped by both chucks, Make sure that the pipe to be cut is pressed against the cutting means.

According to the invention of claim 8 , the guide plate prevents the chucks from being displaced when the chucks are locked in the joined state. Further, according to the invention of claim 9, since the counter rollers rotate while contacting the outer peripheral surfaces of both chucks, the outer peripheral surfaces of both chucks do not contact the frame.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to the drawings. As shown in FIG. 3, the cutting device body 1
Is composed of a gripping mechanism 2 having a wheel shape and a drive mechanism 3 for rotationally driving the gripping mechanism 2. The gripping mechanism 2 and the driving mechanism 3 can be separated.

First, the structure of the gripping mechanism 2 will be described. As shown in FIGS. 3 and 6, the gripping mechanism 2 is composed of a first chuck 4 and a second chuck 5 each having a half-split wheel shape. Both chucks 4 and 5 are shown in FIGS.
As shown in, the left and right large diameter portions α and the central small diameter portion β are integrally formed in the width direction. A pair of hinges 6 are provided at the base ends of both chucks 4 and 5.
That is, as shown in FIGS. 1 and 6, each chuck 4,
5, connecting plates 6a, 6b are provided on the inner wall of the base end of the large diameter portion α
Are fixed with screws 7. A pin 8 swingably supports the base ends of both the connecting plates 6a and 6b, and both chucks 4 and 5 are swingably supported about the pin 8.

As shown in FIGS. 1 and 5, at the tips of the first chuck 4 and the second chuck 5, there is arranged a lock mechanism 9 capable of locking both chucks 4 and 5 in a joined state. That is, the fixing screw 5 is attached to the tip of the first chuck 4.
3, a hooked piece 10 having a claw portion 10a at its tip is provided so as to project along the circumferential direction. On the other hand, a supporting piece 11 is provided near the tip of the second chuck 5 so as to project radially outward of the gripping mechanism 2. An operation piece 12 having a bifurcated tip is rotatably supported by a pin 13 at both ends of the support piece 11. A hooking piece 14 having a claw portion 14a at its tip is rotatably supported by a pin 15 near the center of the operation piece 12 in the longitudinal direction.

Then, the claw portions 14a of the hooking piece 14 are engaged with the claw portions 10a of the hooked piece 10 to operate the operating piece 12.
Is positioned at the lock position (indicated by the solid line in FIG. 1), the tip surfaces of both chucks 4 and 5 can be held in a joined state. By moving the operation piece 12 from the lock position to the lock release position (shown by the chain double-dashed line in FIG. 1), the claw portion 10a and the hook piece 14 of the hooked piece 10 are moved.
The engagement with the claw portion 14a can be released.

Front semi-circular grooves 16 and 17 having the same diameter are provided at opposite positions of the first and second chucks 4 and 5.
Are formed. An insertion hole 18 is formed in the center of the gripping mechanism 2 by the arrangement of the grooves 16 and 17 facing each other when the chucks 4 and 5 are in the joint locked state, and a polyethylene pipe to be cut is formed in the insertion hole 18. 19 can be inserted therethrough.

As shown in FIGS. 2 and 3, a plurality of first support shafts 20 are provided around the insertion hole 18 on the front surface of the gripping mechanism 2 at predetermined intervals on the same circumference, and the insertion hole 18 is formed. At a predetermined angle (in this embodiment, 1.5
It is arranged so as to project at an inclination of (°). A first roller 21 is rotatably supported at the tip of the first support shaft 20.

As shown in FIGS. 2 and 4, a plurality of second support shafts 2 are provided around the insertion hole 18 on the back surface of the gripping mechanism 2.
2 have a predetermined interval on the same circumference and the insertion holes 18
It is arranged so as to project at a predetermined angle (1.5 ° in this embodiment) with respect to the axis L of. Each of the second support shafts 22 and the first support shaft 20 are arranged at positions facing each other. A second roller 23 is rotatably supported at the tip of the second support shaft 22, and a pair of protrusions 23a is formed around the second roller 23.
When the cut pipe 19 is cut, the ridges 23a are allowed to slightly bite into the outer peripheral surface of the cut pipe 19. Further, the pipe to be cut 19 is rotatably supported by the first and second rollers 21 and 23 when the pipe to be cut 19 is cut.

As shown in FIGS. 2 and 7, a receiving hole 24 is formed in the groove 16 of the first chuck 4, and a cutting blade 25 as a cutting means holds a bracket 26 in the receiving hole 24. Is fixed through. Through holes 25a, 26a are formed in the facing surfaces of the cutting blade 25 and the bracket 26 so as to be orthogonal to the radial direction of the insertion hole 18 and communicate with each other. A connecting screw 27 is inserted into each of the through holes 25a and 26a, and the cutting blade 25 is slidably connected to the bracket 26 along the radial direction of the through hole 18 by a nut 28 screwed to the screw portion 27a. ing.

Receiving grooves 25b, 26b are formed in the facing surfaces of the cutting blade 25 and the bracket 26 along the radial direction of the insertion hole 18, and a spring 31 is formed in the receiving grooves 25b, 26b.
Is housed. A blade 32 is provided at the tip of the cutting blade 25 and is constantly urged to the axial center of the insertion hole 18 by the action of the spring 31. At the time of cutting the pipe 19 to be cut, the outer periphery of the pipe 19 is cut. A slight biting into the surface is allowed.

Next, the structure of the drive mechanism 3 will be described with reference to FIG. A drive shaft 34 is rotatably supported via a bearing 35 at the center of the base 33 so as to extend in the radial direction of the gripping mechanism 2. A drive bevel gear 36 is fixed to the tip of the drive shaft 34. Support plates 37 and 38 are fixed to the front and back surfaces of the base 33. A frame 29 is constituted by the base 33 and the support plates 37 and 38.

A driven shaft 39 is provided above the support plates 37 and 38.
Is rotatably installed via a bearing 40, and a driven bevel gear 41 meshes with the drive bevel gear 36 on a driven shaft 39 thereof. Urethane drive wheels 42 and 43 are fitted to both ends of the driven shaft 39, and the tip peripheral surfaces of these wheels can contact the tip peripheral surface of the gripping mechanism 2.
The drive shaft 34, the drive bevel gear 36, the driven shaft 39, and the driven bevel gear 41 constitute a torque transmission mechanism.

Support pins 44, are provided on the support plates 37, 38.
45 are projectingly arranged so as to face each other,
The threaded portion at the base end is tightened and fixed by a nut 46. Opposing wheels 47, 48 are provided at the tips of the support pins 44, 45.
Is rotatably supported. The outer surfaces of the peripheral portions 2a and 2b of the first and second chucks 4 and 5 are semicircular concave portions 4a,
5a is formed. The opposed wheels 47, 48 are in contact with the inner peripheral surfaces of the recesses 4a, 5a, and the drive wheels 42, 43 are in contact with the outer surfaces of the peripheral portions 2a, 2b. That is, by sandwiching the first and second chucks 4 and 5 between the opposed wheels 47 and 48 and the drive wheels 42 and 43, the gripping mechanism 2 is rotatably supported.

As shown in FIG. 3, the gripping mechanism 2 rotates in the front clockwise direction as the drive wheels 42, 43 rotate in the front counterclockwise direction. The gripping mechanism 2 corresponding to the diameter of the pipe to be cut 19 of 25 mm to 100 mm can be inserted between the opposed wheels 47 and 48 and the drive wheels 42 and 43.

As shown in FIGS. 3 and 6, the base 33 is
Protective plates 49 are fixed to both left and right end surfaces of the. Brushes 50 as a pair of cleaning means are detachably attached to the lower end of the protective plate 49 on the left side of the front face with attachment screws 52 via attachment pieces 51, and the tips of the brushes 50 are the peripheral portions 2a of the gripping mechanism 2, It is in contact with 2b. Then, when the gripping mechanism 2 is rotated, dust or dirt adhering to the periphery thereof can be cleaned by the brush 50.

Next, the operation and effect of the cutting device configured as described above will be described. First, a method of mounting the gripping mechanism 2 on the drive mechanism 3 in a state where the gripping mechanism 2 and the drive mechanism 3 are separated will be described. While the first and second chucks 4 and 5 are in the unlocked state, that is, in the state where the gripping mechanism 2 is divided, the tip of the peripheral portion 2a is sandwiched between the drive wheel 42 and the opposed wheel 47, and the peripheral portion 2b is The tip is inserted between the drive wheel 43 and the opposing wheel 48, and the attachment to the drive wheel 42 is completed.

Groove 1 of first or second chuck 4, 5
With the pipe to be cut 19 accommodated in 6 and 17, the claw portion 14a of the hooking piece 14 is engaged with the claw portion 10a of the hooked piece 10 to rotate the operation piece 12 in the inner diameter direction of the gripping mechanism 2. .
Then, the claw portions 10a and 14a are attracted to each other,
The first and second chucks 4 and 5 are locked in a joined state. That is, the pipe to be cut 19 is gripped by the gripping mechanism 2, and the periphery thereof is surrounded by the first and second rollers 2
It is rotatably supported by 1, 23.

Subsequently, a chuck such as an electric drill as a drive source (not shown) is fastened and connected to the tip of the drive shaft 34, and the chuck is rotated by the driving force of the motor. The drive shaft 34 is rotated in the direction of the arrow Y1 shown in FIG. 3, and both drive wheels 42 and 43 are rotated in the front counterclockwise direction via the drive bevel gear 36, the driven bevel gear 41 and the driven shaft 39. The peripheral surface of the drive wheel 42 and the peripheral surface of the peripheral portion 2a, and the drive wheel 4
The gripping mechanism 2 is rotated clockwise in the front direction by the frictional force between the peripheral surface of the peripheral portion 3 and the peripheral surface of the peripheral portion 2b. Then, the pipe to be cut 19 is relatively moved in the direction of the arrow Y2 shown in FIG. At this time, the cutting blade 25 is relatively moved along the circumferential direction of the pipe to be cut 19, and the peripheral surface of the pipe to be cut 19 is cut with a predetermined thickness by the blade 32. Even if the cutting peripheral surface of the cut pipe 19 has an elliptical cross section, the blade 32 is pressed by the pressure of the spring 31 against the cutting peripheral face of the cut pipe 19 at a constant pressure.

When the gripping mechanism 2 rotates, the peripheral portion 2
Since the peripheral surfaces of a and 2b are constantly cleaned by the brush 50, the accumulation of sand dust and the like is prevented. That is, the drive wheels 42, 4
It is possible to prevent the transmission efficiency of the rotational driving force from being reduced due to the frictional force of the outer peripheral portion 3 and the peripheral portions 2a and 2b.

After the cutting is completed, the drive of the drive shaft 34 is stopped. Then, the operation piece 12 of the lock mechanism 9 is rotated in the direction opposite to the inner diameter of the grip mechanism 2. The claw portion 10a of the hooked piece 10 and the claw portion 14a of the hooked piece 14 are disengaged, the tips of the first and second chucks 4, 5 are divided, and the cut object 19 before cutting is cut. Replace with the cutting body 19. Further, when changing the diameter of the body 19 to be cut, the driving mechanism 3 and the gripping mechanism 2 are separated in the reverse order of mounting as described above. After that, the gripping mechanism 2 having the desired diameter of the insertion hole 18 is mounted on the drive mechanism 3 by the mounting method described above.

Now, in this embodiment, the gripping mechanism 2
Are rotatably supported by inserting the peripheral portions 2a and 2b between the drive wheels 42 and 43 and the opposing wheels 47 and 48. That is, the gripping mechanism 2 corresponding to an arbitrary diameter of the body to be cut 19 is attached to and detached from the drive mechanism 3. Therefore, the drive mechanism 3 can be shared so as to correspond to the gripping mechanisms 2 having different diameters. As a result, the manufacturing cost of the cutting device body 1 can be reduced.

The gripping mechanism 2 is composed of the first and second chucks 4 and 5, and the base ends of the chucks 4 and 5 are relatively swung by a hinge 6. Further, the tips of the first and second chucks 4 and 5 are held in a joined state by a lock mechanism 9. Therefore, the pipe 19 to be cut can be easily attached / detached into / from the insertion hole 18 of the gripping mechanism 2.

Further, when the gripping mechanism 2 is rotated, dust and the like attached to the peripheral surfaces of the peripheral portions 2a and 2b are swept out by the brush 50. Therefore, the drive wheels 4
It is possible to prevent the frictional force between the peripheral parts 2 and 43 and the peripheral parts 2a and 2b from decreasing. As a result, it is possible to prevent the rotation driving efficiency of the gripping mechanism 2 from being lowered.

Next, the second embodiment will be described. The same components as those of the first embodiment or corresponding components are designated by the same reference numerals and the description thereof will be omitted. Therefore,
Hereinafter, the points different from the first embodiment will be mainly described.

The gripping mechanism 2 includes the first and second chucks 4 and 5.
And the base ends of both 4 and 5 are relatively swung by a hinge 6. In the first embodiment, the gripping mechanism 2 corresponding to the diameter of the pipe to be cut 19 of 25 mm to 100 mm can be sandwiched between the opposed wheels 47 and 48 and the drive wheels 42 and 43. Hole 18
The diameter of the pipe to be cut 19 may be increased to 100 mm or more. At that time, when the diameter of the pipe to be cut 19 becomes large, the pipe to be cut 19 is slightly deformed in the insertion hole 18, and the blade 32 is pressed against the cutting peripheral surface of the pipe to be cut 19 by the pressure of the spring 31. In some cases, the cutting peripheral surface of the pipe to be cut 19 cannot be sufficiently cut.

Therefore, in this second embodiment, FIGS.
As shown in FIG. 5, a pressing body 80 as a swing roller is provided in the first embodiment so as to be movable in the radial direction of the insertion hole 18 instead of the pair of opposed first and second rotating rollers 21 and 23. . The pressing body 80 has a base 81 having an isosceles triangular cross section, a support shaft 82 at the tip of the base 81, and first and second rollers 83, 84 rotatably attached to both ends of the support shaft 82. It consists of and. A storage hole 85 is formed in the small diameter portion β of the second chuck 5 so that the base 81 can be retracted and retracted. Further, the second chuck 5 communicates with the storage hole 85, and the second chuck 5 has recesses 5 on the front and back sides thereof.
A cutout 86 is provided in the radial direction of the hole a from the side of the insertion hole 18 so that the first and second rollers 83 and 84 can be inserted and removed. Further, a pair of guide elongated holes 87, which are adjacent to both sides of the notch 86 and extend in the radial direction of the insertion hole 18, are provided in the recesses 5a on the front surface and the rear surface.
Engaging pins 8 are provided on both sides of the two corners of the base 81.
8 are projectingly provided, and both pins 88 are slidably engaged with the respective guide elongated holes 87.

Further, as shown in FIGS. 9 and 11, a disc-shaped lid 89 is attached by a screw 90 at a position corresponding to the storage hole 85 on the outer periphery of the second chuck 5. In the storage hole 85, a coil spring 91 is arranged between the inside of the lid 89 and the base 81, and the base 81 is always urged in the axial direction of the insertion hole 18 by the action of the coil spring 91. The urging force of the coil spring 91 is the cutting blade 25.
Is larger than the biasing force of the spring 31 that biases the insertion hole 18 in the axial direction. It is preferable that the biasing force of the coil spring 91 is larger than the biasing force of the spring 31.

Further, as shown in FIG. 11, the rotation axes of the first and second rollers 83 and 84 are inclined at a predetermined angle (1.5 degrees in this embodiment) with respect to the axis L of the insertion hole 18. It is located in. A ridge 84 a is formed around the second roller 84, and the ridge 84 a is cut when the pipe to be cut 19 is cut.
A slight biting into the outer peripheral surface of 9 is allowed. Further, when cutting the pipe to be cut 19, the pipe to be cut 1
Reference numeral 9 denotes the first and second rollers 21, 23 and the pressing body 8.
It is rotatably supported by zero first and second rollers 83 and 84.

Further, as shown in FIGS. 10 and 12, guide plates 92 are attached to the base ends of the recesses 4a on the front and back sides of the first chuck 4 by screws 94 projecting from the base ends. . In addition, the recesses 5 on the front surface and the back surface of the second chuck 5
A guide plate 93 is attached to the tip of a by a screw 94 so as to project from the tip. The two guide plates 92 of the first chuck 4 guide both side surfaces of the base end of the second chuck 5 when the front ends of the two chucks 4 and 5 are joined to each other. Further, when the tip portions of both chucks 4 and 5 are brought into a joined state, the two guide plates 93 of the second chuck 5 guide both side surfaces of the tip portion of the first chuck 5. A hole 101 is provided at the tip of one guide plate 93.

Further, in the first embodiment, when the first chuck 4 and the second chuck 5 are locked, the lock mechanism 9 including the hooked piece 10 and the hooking piece 14 and the like is used. As shown in FIGS. 12 and 13, the first chuck 4
Mechanism 95 as a lock mechanism provided near the tip of the
To use. The latch mechanism 95 will be described. A storage hole 96 is formed in the front concave portion 4a near the tip of the first chuck 4, and a pin 97 is slidably stored in the storage hole 96. A coil spring 98 is housed between the pin 97 and the bottom of the housing hole 96 in the housing hole 96, and the pin 97 is housed in the housing hole 9 by the coil spring 98.
6 is urged in the opening direction (arrow Y3 direction in FIGS. 12 and 13).

A guide elongated hole 99 is provided along the longitudinal direction of the pin 97 near the tip of the first chuck 4 so as to communicate with the storage hole 96. A screw 100 is attached to the pin 97 through a guide elongated hole 99, and a head portion 100a of the screw 100 projects outward from the guide elongated hole 99. When the screw 100 is in contact with one end 99a of the elongated guide hole 99, the tip of the pin 97 is projected from the storage hole 96, and when the tips of both chucks 4 and 5 are in the joined state, the hole of one guide plate 93 is formed. It is possible to enter 101.

When the screw 100 is moved in the direction of the opposite arrow Y3 against the elastic force of the coil spring 98 so that the screw 100 is in contact with the other end 99b of the elongated guide hole 99, the tip of the pin 97 is retracted. It is designed to be immersed in the hole 96.
Further, as shown in FIG. 12, an oblique guide surface 97a is formed at the tip of the pin 97.

As shown in FIGS. 10 and 11, the rear support plate 37 has a hole 102 formed at a position slightly above the nut 46. Above the hole 102, the counter plate 103 is attached to the support plate 37 via the bracket 103a.
Is rotatably supported. Counter roller 103
One side is penetrated into the hole 102, and a part thereof is projected into the frame 29. When the gripping mechanism 2 is sandwiched between the opposed wheels 47 and 48 and the drive wheels 42 and 43, the counter roller 103 contacts the outer peripheral end surfaces 4b and 5b of the ratchets 4 and 5 and rotates.

As shown in FIG. 10, mounting screws 52 are screwed to the lower ends of the protective plates 49 on the left and right sides of the rear face, to mounting pieces 51 which support the base ends of a pair of brushes 50 as cleaning means. By doing so, they are detachably attached, and the respective tips are in contact with the peripheral portions 2a, 2b of the gripping mechanism 2. Then, when the gripping mechanism 2 rotates, the brush 50 immediately before and immediately after the dust or the like attached to the peripheral surfaces of the peripheral portions 2a and 2b contact the peripheral portions 2a and 2b to the drive wheels 42 and 43. It can be cleaned at.

Next, the operation and effect of the cutting device configured as described above will be described. First, a method of mounting the gripping mechanism 2 on the drive mechanism 3 in a state where the gripping mechanism 2 and the drive mechanism 3 are separated will be described. While the first and second chucks 4 and 5 are in the unlocked state, that is, in the state where the gripping mechanism 2 is divided, the tip of the peripheral portion 2a is sandwiched between the drive wheel 42 and the opposed wheel 47, and the peripheral portion 2b is The tip is inserted between the drive wheel 43 and the opposing wheel 48, and the attachment to the drive wheel 42 is completed.

Groove 1 of first or second chuck 4, 5.
When the chucks 4 and 5 are placed in the joint lock state with the pipe 19 to be cut accommodated in the pipes 6 and 17, first, the guide plate 93 is used.
The tip of the pin contacts the guide surface 97a of the pin 97. Subsequently, the tip of the guide plate 93 pushes the pin 97 while sliding on the guide surface 97a, so that the pin 97 moves in the opposite arrow Y3 direction.
The coil spring 98 moves in the direction against the elastic force. Then, when the tips of both chucks 4 and 5 are completely joined, the pin 97 is biased by the coil spring 98 and pushed in the direction of the arrow Y3. Then, the tips of the pins 97 are inserted into the holes 101 of the guide plate 93, so that the tips of the chucks 4 and 5 are locked so as not to separate from each other.

Subsequently, a chuck such as an electric drill as a drive source (not shown) is fastened and connected to the tip of the drive shaft 34, and the chuck is rotated by the driving force of the motor. The drive shaft 34 is rotated in the direction of the arrow Y1 shown in FIG. 11, and both drive wheels 42, 43 are rotated in the front counterclockwise direction via the drive bevel gear 36, the driven bevel gear 41 and the driven shaft 39. The gripping mechanism 2 is rotated in the front clockwise direction by the frictional force between the peripheral surface of the drive wheel 42 and the peripheral surface of the peripheral portion 2a and the peripheral surface of the drive wheel 43 and the peripheral surface of the peripheral portion 2b. Then, as the pipe to be cut 19 is rotated relative to the gripping mechanism 2, as shown in FIG.
It is relatively moved in the direction of the arrow Y2 shown therein. On this occasion,
When the pressing body 80 presses the pipe to be cut 19, the cutting blade 25 is relatively moved along the circumferential direction of the pipe to be cut 19 in a state where the peripheral surface of the pipe to be cut 19 is pressed by the cutting blade 25. The peripheral surface of the pipe to be cut 19 is cut to a predetermined thickness by the blade 32. Further, the outer peripheral end surfaces 4b and 5b of both ratchets 4 and 5 rotate while contacting the counter roller 103.

After the cutting is completed, the drive of the drive shaft 34 is stopped. When the chucks 4 and 5 are unlocked, the screw 100 is moved in the direction opposite to the arrow Y3 against the elastic force of the coil spring 98, so that the hole 10 of the guide plate 93 is removed.
The tip of the pin 97 that has been engaged in 1 is removed. And
Both chucks 4, 5 are opened until the tip of the guide plate 93 is separated from the tip of the first chuck 4, and the pin 97 is moved in the direction of arrow Y3 by relying on the elastic force of the coil spring 98.

Therefore, both chucks 4 and 5 can be easily locked and unlocked by the latch mechanism 95 and securely locked. By providing the guide plates 92 and 93, the base end portions and the tip end portions of the first and second chucks 4 and 5 are in the Y3 direction and the opposite arrow Y3 direction in FIG. There is no deviation.

Further, the diameter of the pipe to be cut 19 is large and the insertion hole 1
Even if it is slightly deformed within 8, the pipe 19 to be cut is pressed by the pressing body 80.
Is pressed in the radial direction, and the blade 32 surely cuts the cutting peripheral surface of the pipe 19 to be cut. Further, since the biasing force of the coil spring 91 is larger than the biasing force of the spring 31, it is possible to reliably press the pipe to be cut 19 and cut the cutting peripheral surface of the pipe to be cut 19 on the blade 32.

Further, by providing the counter roller 103, the outer peripheral end surfaces 4b, 5b of both ratchets 4, 5 come into contact with the frame 29 and the support plate 37 and both ratchets 4,
The outer peripheral end faces 4b, 5b of the member 5 are not scraped.

Further, since the brushes 50 are provided on the front surface and the back surface of the support plate 37, when the gripping mechanism 2 rotates, dust or dust adhered to the peripheral surfaces of the peripheral parts 2a and 2b of the peripheral part 2a, 2b is the same peripheral part. Just before 2a, 2b contact the drive wheels 42, 43,
Immediately after that, the brush 50 can be used for cleaning.
Therefore, it is possible to prevent the frictional force between the drive wheels 42, 43 and the peripheral portions 2a, 2b from decreasing. As a result, it is possible to prevent the rotation driving efficiency of the gripping mechanism 2 from being lowered.

The present invention is not limited to the above-mentioned embodiments, but may be appropriately modified as follows, for example, without departing from the spirit of the present invention. (1) In the above-described embodiment, the pressing body 80 is movable by the engaging pins 88 that slide in the four elongated guide holes 87. However, as shown in FIG. The chuck 5 is fixed to the recess 5 a, and one end of the base 81 is rotatable with respect to the engaging pin 88. Further, an L-shaped locking pin 104 is attached to the inner surface of the housing hole 85 on the surface where the other end of the base 81 approaches, and one end 10 of the pin 104 is attached.
4a may be projected to the opening surface of the storage hole 85 facing the insertion hole 18, and the other end of the base 81 may be provided so as not to project from the storage hole 85 by the coil spring 91.

(2) Although the brush 50 is provided on the peripheral portions 2a and 2b, it may be provided on the drive wheels 42 and 43 in addition to this. (3) In the above embodiment, the electric drill was used as the driving part, but other than this, the tip of the drive shaft may be motor-connected.

(4) As shown in FIG. 15, the base 33
Instead of the above, the bases 54a and 54b are used.
a and 54b are slidably connected. An internal gear 55 is fixed to the inner peripheral edge of the recesses 4a and 5a (only a part of which is shown) of the chucks 4 and 5. A gear 56 meshed with the internal gear 55 is rotatably supported on the support plate 37 by a rotary shaft 57. The driven shaft 58 and the rotary shaft 57 may be connected to the universal joints 59a and 59b and the shaft 60 so that the rotational force from the drive shaft 34 can be transmitted to the gear 56.
When the drive mechanism 3 is attached to the gripping mechanism 2, the bases 54a and 54b are widened and the bases 54a and 54b are
The internal gear 55 and the gear 56 may be engaged with each other by sliding 54b. After that, the bases 54a and 54b are locked by a lock body (not shown) so as not to spread.

(5) As shown in FIG. 16, the drive mechanism 3 is made swingable by a hinge 62, and the internal gear 55 and the gear 5 are
6 may be engaged. (6) As shown in FIG. 17, the driving shaft 34, the driving bevel gear 36, and the driven bevel gear 41 are omitted, and instead, the driving wheels 42 and 43 are integrally rotatably coupled and the outside of the support plate 37. A drive shaft 61 extending in one direction may be provided. Then, a chuck such as an electric drill may be fastened to the tip of the drive shaft 61, and the rotational force of the electric drill may be transmitted to the drive wheels 42 and 43 via the drive shaft 61.

(7) Although one pressing body 80 is provided in the above embodiment, a plurality of pressing bodies may be provided. Also, a plurality of cutting blades 25 may be provided. In this specification, a spring means an elastic body and includes not only springs such as leaf springs, coil springs, spiral springs, stick springs and bamboo springs, but also polymeric elastic materials such as sponges and leaf rubbers and air cushions. The fluid-utilizing elastic body is included.

[0065]

As described in detail above, according to the invention of claim 1, the tips of the first and second chucks can be easily opened and closed by the lock mechanism, and the pipe to be cut can be easily attached to both chucks. It has an excellent effect that it can be attached to and detached from.
Even if the pipe to be cut is slightly deformed, the swing roller
Since the pipe to be cut is pressed by the cutting blade,
The peripheral surface of can be cut. The invention according to claim 2
According to the above, the pressing force of the swing roller is the pressing force of the cutting blade.
Since it is much larger, even if the pipe to be cut is slightly deformed
The pipe to be cut is pressed by the ing roller to ensure the cutting blade.
The body can cut its peripheral surface.

According to the third aspect of the invention, since the gripping mechanism can be attached and detached between the drive wheel and the opposing wheel, the drive unit can be made common without being affected by the diameter size of the gripping mechanism. It has an excellent effect that it can be done.

According to the invention described in claim 4 , there is an excellent effect that the peripheral surface of the pipe to be cut can be uniformly cut by the cutting means. According to the invention described in claim 5 , since the contacting engagement surfaces of the gripping mechanism and the drive wheel are cleaned by the cleaning means, it is possible to prevent the driving efficiency of the gripping mechanism from being lowered due to the frictional force of the drive wheel. It has an excellent effect.

According to the sixth aspect of the invention, even if the pipe to be cut is slightly deformed, the pipe to be cut is pressed by the swing roller, so that the peripheral surface of the pipe can be surely cut by the cutting blade.

According to the invention described in claim 7 , since the pressing force of the swing roller is much larger than the pressing force of the cutting blade, even if the pipe to be cut is slightly deformed, the pipe to be cut is pressed by the swing roller. The peripheral surface can be reliably cut by the cutting blade.

According to the eighth aspect of the invention, the guide plate can prevent both chucks from being displaced in the axial direction of the chuck. According to the invention of claim 9 , since the counter rollers rotate in contact with the outer peripheral surfaces of both chucks, it is possible to prevent the outer peripheral surfaces of both chucks from rubbing against the frame.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 5 in this embodiment.

FIG. 2 is likewise a sectional view taken along line BB of FIG.

FIG. 3 is a partially cutaway front view of the cutting device body.

FIG. 4 is a partially cutaway rear view of the cutting device body.

FIG. 5 is likewise a left side view of the cutting device body.

FIG. 6 is likewise a right side view of the cutting device body.

FIG. 7 is likewise a sectional view of a cutting blade.

FIG. 8 is a perspective view of a pressing body of another example.

FIG. 9 is likewise a front view of a pressing body of another example.

FIG. 10 is a partially cutaway front view of a cutting device body of another example.

FIG. 11 is a sectional view showing a state where a pipe to be cut is attached to a main body of a cutting device of another example.

FIG. 12 is also a front view of a latch mechanism of another example.

FIG. 13 is a sectional view taken along line CC of FIG.

FIG. 14 is likewise a perspective view of a pressing body of another example.

FIG. 15 is likewise a sectional view of a cutting device body showing another example.

FIG. 16 is also a principle explanatory diagram of a drive mechanism showing another example.

FIG. 17 is a sectional view of a cutting device body showing another example of the same.

FIG. 18 is a perspective view showing the joining of resin pipes in a conventional technique.

[Explanation of symbols]

2 ... gripping mechanism, 4 ... first chuck, 5 ... second chuck,
6 ... Hinge, 9 ... Lock mechanism, 19 ... Pipe to be cut, 25 ...
Cutting blade (cutting means), 29 ... Frame, 30 ..., 31
... Spring as an elastic body, 42, 43 ... Drive wheels, 47, 4
8 ... Opposing wheel, 50 ... Brush (cleaning means), 80 ... Pressing body as a swing roller, α ... Large diameter part, β ... Small diameter part.

Front page continued (72) Inventor Kappei Omi 27 Shinmeicho, Anjo City, Aichi Prefecture Omi Industry Co., Ltd. (56) Reference JP-A-2-139195 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B26D 3/16 B23D 21/00 510

Claims (9)

(57) [Claims] 1. A hinge for swingably connecting the first chuck and the second chuck, which rotatably grips a pipe to be cut, to each other in cooperation with each other, and hinges are provided at the distal ends of the chucks. A cutting mechanism that locks the pipe to be cut in a gripping state and cuts the peripheral surface of the pipe to be cut by relative rotation of both chucks and the pipe to be cut on at least one of the first chuck and the second chuck. Means are provided , and
Both chucks on the inner surface of the first and second chucks
A plurality of shafts that rotate about an axis extending in the same direction as the central axis of
Rollers are attached, at least one of which is
One is to cover the first chuck and the second chuck in the radial direction.
A swing roller equipped with a biasing means for pressing the cutting tube.
Gripping mechanism of the cutting device, characterized in that that. 2. The cutting means is biased by an elastic body.
Pipe to be cut in the radial direction of the first chuck and the second chuck
Is provided so as to press, and the pressing force of the elastic body is
Characteristic that it is weaker than the pressing force of the biasing means of the swing roller
The gripping mechanism of the cutting device according to claim 1. 3. A rotatably supported frame,
When the gripping state
A drive wheel that rolls both chucks and a drive wheel that is provided on the frame and that moves from the driving part to the drive wheel.
A torque transmission mechanism for transmitting torque, arranged opposite each other across the chuck to the drive wheel, front
Both chucks are detachably inserted between the drive wheel and
In addition, it supports the chuck so that it can rotate in cooperation with the drive wheels.
A cutting device having a facing wheel to be held.
Live unit. 4. A pipe to be cut is rotatably held in cooperation with each other.
Provided at the base end of the first and second chucks to be held.
And a hinge that connects them to each other in a swingable manner, and a tip provided on both chucks that grips the pipe to be cut.
The lock mechanism for locking in the stationary state and at least one of the two chucks.
The pipe to be cut is rotated by the relative rotation of both chucks and the pipe to be cut.
Of the gripping mechanism, which is rotatably supported with respect to the frame.
Both chucks in a gripping state by abuttingly engaging the peripheral surfaces of both chucks
And a drive wheel that rolls the wheel, and the
A torque transmission mechanism for transmitting torque, arranged opposite each other across the chuck to the drive wheel, front
Both chucks are detachably inserted between the drive wheel and
In addition, it supports the chuck so that it can rotate in cooperation with the drive wheels.
A cutting device having an opposed wheel to be held. 5. A drive wheel and first and second drive wheels are provided on the frame.
The number of cleaning means for cleaning the abutting engagement surface of the two chucks is small.
The device according to claim 4, wherein at least one is provided.
Cutting equipment. 6. The inside of the first chuck and the second chuck
On the peripheral surface, there is a shaft that extends in the same direction as the central axes of both chucks.
A plurality of rotating rollers are attached to the center of the roller.
At least one of the rollers is the first chuck and the second chuck.
Equipped with a biasing means for pressing the pipe to be cut in the radial direction of the backpack
5. A swing roller which is a swing roller.
The cutting device according to any one of 5. 7. The cutting means is biased by an elastic body.
Pipe to be cut in the radial direction of the first chuck and the second chuck
Is provided so as to press, and the pressing force of the elastic body is
Characteristic that it is weaker than the pressing force of the biasing means of the swing roller
Cutting equipment according to any one of claims 4 to 6.
Place 8. The first chuck or the second chuck
From at least one of the
The first chuck and the second chuck.
The tip of the chuck is fixed so that it cannot move in the same direction as its center axis.
8. A guide plate for restraining is provided, which is characterized in that
The cutting device according to any one of the above. 9. A rotatably supported frame,
Counter that abuts the outer peripheral surface of both chucks of the gripping mechanism
The drive according to claim 3, further comprising a roller.
Eve unit.