JP7125071B2 - Cutting device - Google Patents

Description

The present invention relates to a cutting device.

Patent Document 1 listed below discloses a pipe cutter provided with a pair of lever handles. A pipe receiving portion is provided on the tip side of one of the lever handles, and a cutting blade capable of cutting the pipe and a presser foot that fixes the pipe between the receiving portion is provided on the tip side of the other lever handle. A member is provided. Then, the pressing member is biased toward the receiving portion by the torsion spring, and cuts the pipe while sandwiching the pipe.

In Patent Document 2 below, a cutting edge is movably supported via a support member by a turning member that is supported so as to turn around the axis of a pipe, and a cutting edge is moved toward the outer circumference of the pipe by a pressing spring. A pressing pipe cutter is disclosed. In this configuration, the turning member is turned while the cutting edge is in pressure contact with the outer circumference of the pipe to cut the pipe with the cutting edge.

JP-A-2005-87642 JP 2003-136326 A

With the pipe cutter described in Patent Document 1, a pair of lever handles are grasped and the pipe is cut by manually bringing the pair of lever handles closer together.

In addition, the pipe cutter described in Patent Document 2 is configured to press the cutting edge supported by the support member against the pipe to cut the pipe, so the cutting operation takes time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cutting apparatus capable of easily cutting a pipe.

In order to solve the above problem, the cutting device according to the first aspect comprises a chuck body, a holding member for holding a pipe inserted into the inside of the chuck body, and a holding member provided in the chuck body, a plurality of chuck claws extending and retracting in a radial direction; a cutting blade provided on the chuck claws for cutting the pipe; It has moving means for pressing the cutting blade against the pipe while advancing in the radial direction of the pipe, and rotating means for rotating the chuck body along the circumferential direction of the pipe together with the plurality of chuck claws.

According to the cutting device of the first aspect , the pipe inserted through the interior of the chuck body is held by the holding member. A plurality of chuck claws provided on the chuck body advances and retreats in the radial direction of the pipe by the moving means. The chuck claws are provided with cutting blades for cutting the pipe, and the moving means presses the cutting blades against the pipe while advancing the chuck claws in the radial direction of the pipe. Then, the pipe is cut by the cutting blade by rotating the chuck main body along with the plurality of chuck claws along the circumferential direction of the pipe by rotating means while advancing the chuck claws in the radial direction of the pipe. Thereby, the pipe can be easily cut.

A cutting device according to a second aspect is the cutting device according to the first aspect , wherein the moving means is provided on a side of the chuck claw facing the pipe, and moves in a direction intersecting the axial direction of the pipe. a moving part provided closer to the outer peripheral surface of the pipe than the inclined surface and moving along the axial direction of the pipe; and a moving part provided in the moving part and sliding on the inclined surface. and a sliding surface for advancing and retracting the chuck claws in the radial direction of the pipe.

According to the cutting device of the second aspect , the side of the chuck claw facing the pipe is provided with an inclined surface arranged in a direction intersecting the axial direction of the pipe. A moving part is provided on the outer peripheral surface side of the pipe with respect to the inclined surface, and the moving part moves along the axial direction of the pipe. The moving part is provided with a sliding surface that slides on the inclined surface, and when the moving part moves along the axial direction of the pipe, the sliding surface slides on the inclined surface, thereby moving the chuck claws. Advance and retreat in the radial direction of the pipe. Therefore, by moving the moving portion, the chuck claws can be easily advanced and retracted in the radial direction of the pipe.

A cutting device according to a third aspect is the cutting device according to the second aspect , wherein the rotating means rotates the moving portion together with the chuck body.

According to the cutting apparatus according to the third aspect , the rotating means is configured to rotate the moving portion together with the chuck body, so there is no need to relatively rotate the sliding surface and the inclined surface.

A cutting device according to a fourth aspect is the cutting device according to the third aspect , wherein a groove provided on one of the sliding surface and the inclined surface and arranged along the axial direction of the pipe; and a protrusion provided on the other of the moving surface and the inclined surface and inserted into the groove to guide the movement of the inclined surface in the radial direction of the pipe.

According to the cutting device of the fourth aspect , the protrusion provided on the other of the sliding surface and the inclined surface is inserted into the groove provided on one of the sliding surface and the inclined surface. As a result, with the protrusion inserted into the groove, the protrusion and the groove move relative to each other along the axial direction of the pipe, thereby guiding the movement of the sliding surface and the slidable inclined surface. Therefore, the chuck claws can be smoothly advanced and retracted in the radial direction of the pipe.

A cutting device according to a fifth aspect is the cutting device according to any one of the first to fourth aspects , wherein the cutting blade is a circular blade with a blade formed on a peripheral edge, and the chuck It is circumferentially rotatably supported by the pawl.

According to the cutting device according to the fifth aspect , the cutting blade is a circular blade and is supported by the chuck claws so as to be rotatable in the circumferential direction. The cutting blade rotates when pressed against the Therefore, the pipe can be easily cut.

A cutting device according to a sixth aspect is the cutting device according to any one of the first to fifth aspects , wherein the pipe is cut from the inner peripheral surface side at a position where the cutting blade is pressed against the pipe. A supporting core is provided.

According to the cutting device according to the sixth aspect , since the core portion that supports the pipe from the inner peripheral surface side is provided at the position where the cutting blade is pressed against the pipe, the pipe is restrained from bending radially inward. and the pipe can be cut easily.

According to the cutting device of the present invention, the pipe can be easily cut.

It is a sectional view showing a cutting device concerning a 1st embodiment. FIG. 4 is a cross-sectional view showing a configuration around a chuck body and chuck claws used in the cutting device according to the first embodiment, showing a state in which the cutting blade is retracted with respect to the pipe. 3 is a side view showing a chuck body and chuck claws used in the cutting device according to the first embodiment; FIG. FIG. 4 is a cross-sectional view showing the configuration around the chuck body and chuck claws used in the cutting device according to the first embodiment, showing a state in which the cutting blade is advanced and pressed against the pipe. It is a sectional view showing a cutting device concerning a 2nd embodiment. It is a front view which shows the pipe cutter of a comparative example.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
A cutting apparatus according to a first embodiment will be described with reference to FIGS. 1 to 4. FIG.

FIG. 1 shows a cutting device 10 according to the first embodiment in a sectional view. FIG. 2 shows a cross-sectional view of the chuck main body 12 and chuck claws 16 of the cutting device 10 . As shown in FIGS. 1 and 2, the cutting device 10 is a device for cutting (cutting) a pipe 102 such as a hose or a tube. The cutting device 10 includes a chuck body 12 and a holding device 14 that holds a pipe 102 inserted inside the chuck body 12 . The chuck body 12 is provided with a plurality of chuck claws 16 extending and retracting in the radial direction of the pipe 102 . A cutting edge (cutter) 18 for cutting the pipe 102 is provided at the tip of the chuck claw 16 (inside the chuck body 12 in the radial direction).

Further, the cutting device 10 is a moving device as moving means for advancing and retreating the chuck claws 16 in the radial direction of the pipe 102 and pressing the cutting blade 18 against the pipe 102 while advancing the chuck claws 16 in the radial direction of the pipe 102 . 20. Furthermore, the cutting device 10 includes a rotating device 22 as rotating means for rotating the chuck body 12 along with the plurality of chuck claws 16 along the circumferential direction of the pipe 102 .

The chuck body 12 is made of a cylindrical member and is formed in a substantially crank shape when viewed in cross section along the axial direction of the pipe 102 . More specifically, the chuck main body 12 has a tubular portion 12A arranged along the outer peripheral surface of the pipe 102, and an axial end portion (the end portion on the chuck claw 16 side) of the tubular portion 12A in a radial direction. It has a vertical wall portion 12B extending outward, and a cylindrical portion 12C extending from the outer end portion of the vertical wall portion 12B toward the chuck claw 16 side. The chuck body 12 has a substantially circular opening 26 at its center, and the pipe 102 is inserted through the opening 26 .

In this embodiment, as shown in FIG. 3, three chuck claws 16 are arranged along the radial direction of the chuck body 12 at predetermined intervals in the circumferential direction of the chuck body 12 . The chuck body 12 is provided with grooves 28 that guide the movement of the chuck claws 16 substantially along the radial direction. By moving the chuck claws 16 inserted into the grooves 28, the chuck claws 16 advance and retreat in the radial direction of the pipe 102 (see FIG. 1).

1 and 2 are not sectional views along the vertical direction of the cutting device 10, but sectional views cut at the positions of the two chuck claws 16 of the cutting device 10 in order to make the configuration of the cutting device 10 easier to understand. It is said that

As shown in FIG. 1, the holding device 14 includes a base 30, a frame 32 fixed to the base 30 and through which the pipe 102 is inserted, and a clamp 34 as a holding member holding the pipe 102 inside the frame 32. and have. The frame 32 is formed in a substantially inverted U shape when viewed in cross section, and includes wall portions 32A and 32B facing each other in the axial direction of the pipe 102 . Lower portions of the walls 32A and 32B are fixed to the base 30. As shown in FIG. An opening (not shown) is formed in the center of each of the walls 32A and 32B, and the pipe 102 is inserted through the opening. By way of example, clamp 34 includes a pair of bands 36 positioned on opposite sides of pipe 102 . The pair of bands 36 has claws (not shown) for gripping the pipe 102 and is configured to open and close substantially parallel to the pipe 102 . By sandwiching the pipe 102 from both sides with the claws of the pair of bands 36, the pipe 102 is fixed and held at a predetermined position.

The pair of bands 36 has a mechanism that can adjust the amount of opening so that the pair of bands 36 serve as guides in order to prevent the pipe 102 from bending downward when the pipe 102 is fed by a feeding device 42, which will be described later. ing. Also, the pair of bands 36 may be electric bands.

A three-claw type open/close chuck that grips the pipe 102 from three sides may be used instead of the pair of bands 36 . Also, the three-claw type open/close chuck may be an electric chuck.

The holding device 14 has an abutting portion 38 against which the tip portion 102A of the pipe 102 abuts. The abutting portion 38 includes a plate member 38A erected on the base portion 30, and a switch portion 38B provided rotatably with respect to the plate member 38A. In this embodiment, the switch portion 38B is rotatably supported on the upper portion of the plate member 38A, and the lower portion of the switch portion 36B rotates in the axial direction of the pipe 102. As shown in FIG. The switch portion 38B detects that the tip portion 102A of the pipe 102 has been sent to the abutment portion 38 when the tip portion 102A of the pipe 102 contacts and rotates toward the plate member 38A. The switch portion 38B of the abutment portion 38 is arranged at a position of the cutting length of the pipe 102 from the cutting blade 18 .

The cutting device 10 includes a feeding device 42 for feeding the pipe 102 toward the holding device 14 on the opposite side of the holding device 14 in the axial direction of the pipe 102 . The feeding device 42 has a pair of rolls 42A, 42B that come into contact with the outer peripheral surface of the pipe 102. As shown in FIG. As an example, one of the rolls 42A, 42B is driven by a motor. One of the rolls 42A and 42B is rotationally driven by a motor, and the other of the rolls 42A and 42B rotates following the movement of the pipe 102, so that the pipe 102 is sent until it hits the switch portion 38B of the abutment portion 38. It's like

The chuck claws 16 are formed in a substantially rectangular shape when viewed from the axial direction of the pipe 102 (see FIG. 3). 1), a cutting blade 18 is provided at the tip on the holding device 14 side. The configuration of the chuck claws 16 will be described later.

The cutting blade 18 is a circular blade with a blade 18A formed on the peripheral edge. At the center of the cutting blade 18, a rotating shaft 46 is provided to support the cutting blade 18 so as to be rotatable in the circumferential direction with respect to the chuck claws 16 (see FIG. 2). In this embodiment, the rotary shaft 46 is not provided with a drive source such as a motor. Therefore, in the free state, the cutting blade 18 can be rotated in the circumferential direction by the rotating shaft 46 .

As shown in FIGS. 1 and 2 , the moving device 20 includes an inclined surface 50 provided on the side of the chuck claw 16 facing the pipe 102 and an outer peripheral surface side of the pipe 102 from the inclined surface 50 . and a draw pipe 52 as a moving part that moves along the axial direction. The draw pipe 52 is provided with a sliding surface 54 that slides on the inclined surface 50 to advance and retreat the chuck claws 16 in the radial direction of the pipe 102 .

As shown in FIG. 2, the inclined surface 50 is arranged in a direction crossing the axial direction of the pipe 102, closer to the chuck body 12 than the position where the cutting edge 18 of the chuck claw 16 is provided. . The inclined surface 50 is tapered such that the inner diameter gradually increases from the portion of the chuck claw 16 on the cutting blade 18 side toward the portion on the chuck main body 12 side. The inclined surface 50 is provided with a spigot groove 56 as a groove portion arranged along the axial direction of the pipe 102 . In this embodiment, the spigot groove 56 is a T-shaped groove.

Although not shown, a T-shaped groove is formed in the vertical wall surface 16B of the chuck claw 16 on the side of the chuck body 12 along the radial direction. A vertical wall surface 12D provided on the distal end side of the cylindrical portion 12C of the chuck body 12 is provided with a T-shaped projection that can move in the radial direction while being inserted into the T-shaped groove of the chuck claw 16. ing. As a result, the chuck claws 16 can move radially with respect to the chuck body 12 while the T-shaped projections on the vertical wall surface 12D of the chuck body 12 are inserted into the T-shaped grooves on the vertical wall surface 16B of the chuck claws 16. It is said that

The draw pipe 52 is provided at a cylindrical portion 52A arranged along the axial direction of the pipe 102, and at one axial end (the end on the chuck claw 16 side) of the cylindrical portion 52A. and a flange portion 52B having an outer diameter larger than the outer diameter.

A tubular portion 52A of the draw pipe 52 is inserted through the opening 26 of the chuck body 12 . The tubular portion 52A has a substantially circular through portion 58 through which the pipe 102 is inserted. The outer diameter of the tubular portion 52A is slightly smaller than the inner diameter of the opening 26 of the chuck body 12, so that the chuck body 12 and the draw pipe 52 can move relative to each other in the axial direction. In this embodiment, the draw pipe 52 is configured to move in the axial direction with respect to the chuck body 12 .

The moving device 20 includes a support member 62 arranged via a bearing 60 at the other axial end of the tubular portion 52A (the end on the feeding device 42 side), and the support member 62 along the axial direction of the pipe 102. and a motor 66 for rotating the screw 64 .

The support member 62 includes a body portion 62A arranged in a direction substantially perpendicular to the axial direction of the draw pipe 52, and a cylindrical body 62B interposed between the body portion 62A and the screw 64. . The tubular body 62B has a threaded portion that is screwed onto the screw 64, and is fixed to the main body portion 62A. In the moving device 20 , the support member 62 moves in the axial direction of the pipe 102 as the screw 64 rotates. As a result, the draw pipe 52 arranged via the bearing 60 moves in the axial direction of the pipe 102 along with the movement of the support member 62 . Although not shown, the upper portion of the cylindrical portion 52A of the draw pipe 52 is supported by the housing of the cutting device 10 via bearings 60. As shown in FIG. Thereby, the draw pipe 52 is rotatable with respect to the support member 62 and the housing of the cutting device 10 .

The sliding surface 54 is formed on the outer peripheral side of the flange portion 52B of the draw pipe 52 . The sliding surface 54 is arranged along the inclined surface 50 of the chuck claw 16, and is a tapered surface whose outer diameter gradually decreases from the portion on the cylindrical portion 52A side toward the portion on the cutting blade 18 side. there is As the draw pipe 52 moves in the axial direction of the pipe 102 , the sliding surface 54 slides on the inclined surface 50 of the chuck claw 16 to advance and retreat the chuck claw 16 in the radial direction of the pipe 102 . ing. That is, the moving device 20 advances the chuck claws 16 in the radial direction of the pipe 102 (closes the chuck claws 16) and retracts the chuck claws 16 in the radial direction of the pipe 102 (opens the chuck claws 16). It functions as an actuator for opening and closing the claw 16 .

In this embodiment, when the draw pipe 52 moves toward the holding device 14 (see FIG. 1), the chuck claws 16 retreat from the pipe 102 (see FIG. 2). Further, when the draw pipe 52 moves to the side opposite to the holding device 14 (see FIG. 1), that is, to the side of the feeding device 42 (see FIG. 1), the chuck claws 16 advance to the pipe 102 side, and the cutting blade 18 moves toward the pipe 102. (See FIG. 4).

The sliding surface 54 is provided with projections 70 that are inserted into the spigot grooves 56 of the inclined surface 50 . The projecting portion 70 is provided along the axial direction of the pipe 102 . In this embodiment, the protrusion 70 is a T-shaped protrusion that can move relative to the spigot groove 56 while being inserted into the spigot groove 56 . The protrusion 70 is inserted into the spigot groove 56 to guide the movement of the inclined surface 50 in the radial direction of the pipe 102 .

In this embodiment, as described above, the chuck claws 16 are attached to the chuck body 12 while the T-shaped protrusions on the vertical wall surface 12D of the chuck body 12 are inserted into the T-shaped grooves on the vertical wall surface 16B of the chuck claws 16. It can be moved in the radial direction. Furthermore, in a state in which the T-shaped projection 70 of the sliding surface 54 is inserted into the T-shaped spigot groove 56 of the sliding surface 54, the projection 70 and the spigot groove 56 are relatively movable. ing. As a result, the chuck claws 16 move (open and close) in the radial direction as the draw pipe 52 moves in the axial direction.

The rotating device 22 includes a pulley 74 and a motor 76 connected to a shaft portion 75 of the pulley 74 to rotate the pulley 74 . Further, the rotating device 22 includes a pulley 78 fixed to the outer peripheral surface of the cylindrical portion 12A of the chuck body 12 and an endless belt 80 wound around the pulleys 74 and 78 . A bearing 82 is provided on the outer peripheral surface side of the cylindrical portion 12A of the chuck body 12 . Although not shown, the tubular portion 12A of the chuck body 12 is supported by the housing of the cutting device 10 via bearings 82. As shown in FIG. Thereby, the chuck body 12 is rotatable with respect to the housing of the cutting device 10 .

In the rotating device 22 , the pulley 74 is rotated by the operation of the motor 76 , and the rotational force of the pulley 74 is transmitted to the pulley 78 by the belt 80 to rotate the pulley 78 . Rotation of the pulley 78 causes the chuck body 12 to rotate in the circumferential direction of the pipe 102 , and together with the chuck body 12 , the chuck claws 16 and the draw pipe 52 rotate in the circumferential direction of the pipe 102 . The rotation of the chuck claws 16 in the circumferential direction of the pipe 102 causes the cutting blade 18 pressed against the pipe 102 to revolve (rotate around the pipe 102).

As shown in FIG. 1, the cutting device 10 includes a control device 90 that controls the operation of the cutting device 10. As shown in FIG. Controller 90 controls the operation of motor 66 , motor 76 and feeder 42 . A detection signal of the switch portion 38B by the abutting portion 38 is input to the control device 90. As shown in FIG. The control device 90 also controls the operation of the clamp 34 of the holding device 14 . For example, the control device 90 operates the clamp 34 of the holding device 14 to hold the pipe 102 when the switch portion 38B detects that the tip portion 102A of the pipe 102 hits the abutting portion 38. control.

A servo motor is used for the motor 66 . As a result, it becomes possible to detect damage to the cutting blade 18 at an early stage from an overload of the motor 66 by utilizing the torque control function of the servomotor. In addition, the control device 90 sets a threshold by setting the torque or current value of the servomotor, so that even if the number of rotations of the motor 76 is not set for each size of the pipe 102, when the number of revolutions is equal to or less than the threshold, It becomes possible to determine that the cutting of the pipe 102 has been completed.

Also, when cutting (cutting) a rubber hose with a reinforcing layer as the pipe 102, if the advance speed of the chuck claws 16 is controlled so that the load of the motor 66 is constant, the soft rubber portion can be cut at high speed. can shorten the cycle time.

Next, the operation and effects of this embodiment will be described.

When cutting (cutting) the pipe 102 with the cutting device 10 , the abutting portion 38 is set at a cutting length position with respect to the cutting blade 18 . Further, as shown in FIG. 2 , by moving the draw pipe 52 toward the holding device 14 by operating the motor 66 of the moving device 20 , the three chuck claws 16 are retracted with respect to the center of the chuck body 12 . (the chuck claw 16 is opened). Further, the feeding device 42 feeds the pipe 102 in the direction of the holding device 14 (direction of arrow A) (see FIG. 1). At this time, the pipe 102 is inserted through the inside of the chuck body 12 and the draw pipe 52 and fed until the pipe 102 hits the abutting portion 38 . When the switch portion 38B detects that the tip portion 102A of the pipe 102 hits the abutment portion 38, the clamp 34 of the holding device 14 is actuated. As a result, the pipe 102 is gripped by the clamp 34 to hold the pipe 102 in place (see FIG. 1).

Next, as shown in FIG. 4, by operating the motor 66 of the moving device 20 to move the draw pipe 52 toward the feeding device 42 (in the direction of arrow B), the chuck claws 16 move in the radial direction of the pipe 102 (in the direction of arrow B). C direction) to press the cutting edge 18 against the outer peripheral surface of the pipe 102 . Then, while the chuck claws 16 are advanced in the radial direction of the pipe 102 by the operation of the motor 66 (while the chuck claws 16 are closed), the motor 76 of the rotating device 22 is operated to move the chuck main body 12 together with the three chuck claws 16 . Rotate along the circumferential direction of the pipe 102 . Thereby, the pipe 102 is cut (cut) by the cutting blade 18 .

In this embodiment, the moving device 20 operates the motor 66 by the torque control function of the motor 66 so as to press the cutting blade 18 against the pipe 102 with a predetermined torque. As a result, according to the cutting (cutting) depth of the pipe 102 by the cutting blade 18, the chuck claws 16 are advanced in the radial direction (direction of arrow C) of the pipe 102 by the operation of the motor 66 (the chuck claws 16 are closed). ), the cutting blade 18 cuts the pipe 102 . Then, the control device 90 determines that the cutting of the pipe 102 is completed when the torque of the motor 66 becomes equal to or less than the threshold.

After the pipe 102 has been cut, the motor 66 of the moving device 20 operates to move the draw pipe 52 toward the holding device 14 (in the direction opposite to the arrow B), thereby moving the three chuck claws 16 against the pipe 102. to retreat (open the chuck claws 16). Furthermore, the clamp 34 of the holding device 14 is opened and the pipe 102 is ejected. The pipe 102 may be manually removed or dropped downward when the clamp 34 is opened.

The cutting device 10 as described above can easily cut the pipe 102 .

Further, the moving device 20 is provided with an inclined surface 50 arranged in a direction crossing the axial direction of the pipe 102 on the side of the chuck claw 16 facing the pipe 102 . A draw pipe 52 is provided on the outer peripheral surface side of the pipe 102 relative to the inclined surface 50 , and the draw pipe 52 moves along the axial direction of the pipe 102 by the operation of the motor 66 . The draw pipe 52 is provided with a sliding surface 54 that slides on the inclined surface 50 . movement to advance and retract the chuck claws 16 in the radial direction of the pipe 102 . Therefore, by moving the draw pipe 52 , the chuck claws 16 and the cutting blade 18 can be easily advanced and retreated in the radial direction of the pipe 102 .

The rotating device 22 is configured to rotate the draw pipe 52 together with the chuck body 12 . Therefore, it is not necessary to rotate the sliding surface 54 and the inclined surface 50 relatively.

In addition, in the moving device 20 , the inclined surface 50 is provided with a spigot groove 56 along the axial direction of the pipe 102 , and the sliding surface 54 is inserted into the spigot groove 56 and moves in the radial direction of the pipe 102 . A protrusion 70 is provided to guide the movement of the inclined surface 50 . As a result, the protrusion 70 and the spigot groove 56 move relative to each other along the axial direction of the pipe 102 in a state where the protrusion 70 is inserted into the spigot groove 56, thereby guiding the movement of the inclined surface 50. . Therefore, the chuck claws 16 can be smoothly advanced and retracted in the radial direction of the pipe 102 .

The cutting blade 18 is a circular blade with a blade 18A formed on the peripheral edge, and is supported by the chuck claw 16 so as to be rotatable in the circumferential direction. As a result, the cutting blade 18 rotates when the cutting blade 18 is pressed against the pipe 102 while the chuck claws 16 are advanced in the radial direction of the pipe 102 . Therefore, the pipe 102 can be easily cut.

In general, when cutting a pipe by rotating the cutting blade itself, chips are generated. can be suppressed.

FIG. 6 shows a pipe cutter 200 of a comparative example. As shown in FIG. 6, the pipe cutter 200 includes a main body 202 formed in a substantially C shape and two rolls 206 arranged side by side at one end 202A of the main body 202 . The two rolls 206 are rotatable by rotating shafts 208 supported by the main body 202, respectively. In addition, the pipe cutter 200 includes a support portion 210 provided on the other end portion 202B of the body portion 202 so as to be able to advance and retreat along the direction of the one end portion 202A, and a cutting blade (cutter) provided at the tip of the support portion 210. ) 212 and . The cutting blade 212 is a rotary blade having a blade on its peripheral edge, and is rotatable with respect to the main body 202 by a rotary shaft 214 . The cutting blade 212 is rotatable in a free state, and a motor for rotationally driving the cutting blade 212 is not provided.

The pipe cutter 200 also has a handle 204 arranged on the other end 202B of the main body 202 on the opposite side of the support 210 . The cutting blade 212 advances or retreats along the direction of the roll 206 by rotating the screw inside the handle 204 in the forward or reverse direction by rotating the handle 204 in the forward or reverse direction.

When using pipe cutter 200 , pipe 102 is inserted between two rolls 206 and cutting blades 212 . Then, by rotating the screw of the handle 204 in the forward direction (for example, in the direction of arrow D), the support portion 210 advances toward the two rolls 206 (in the direction of arrow E), and the cutting blade 212 cuts the pipe 102. Align to position. Then, the handle 204 is rotated in the circumferential direction of the pipe 102 (in the direction of arrow F) while rotating the screw of the handle 204 in the forward direction (in the direction of arrow D, for example). Thereby, the cutting blade 212 revolves around the pipe 102 while rotating. Thereby, the pipe 102 is cut by the cutting blade 212 .

In the pipe cutter 200 described above, it is necessary to manually rotate the handle 204 in the circumferential direction of the pipe 102 (in the direction of arrow F) while rotating the screw of the handle 204, which makes the cutting work (cutting work) time-consuming.

On the other hand, in the above-described cutting device 10, the cutting work (cutting work) of the pipe 102 can be automatically performed, and the cutting work is less troublesome. In the cutting device 10 , the motor 66 of the moving device 20 operates to advance the chuck claws 16 , and the motor 76 of the rotating device 22 operates to rotate the chuck main body 12 and the chuck claws 16 along the circumferential direction of the pipe 102 . . Therefore, the cutting device 10 can easily cut the pipe 102 .

[Second embodiment]
Next, a cutting device according to a second embodiment will be described with reference to FIG. In addition, about the same component part as 1st Embodiment mentioned above, the same number is attached and the description is abbreviate|omitted.

As shown in FIG. 5, a cutting device 110 according to the second embodiment includes a core metal 112 as a core portion inserted into a hose 104 as a pipe, and a core metal 112 that is axially cut into the hose 104 as a pipe. and a cylinder 114 that is moved by The holding device 14 of the present embodiment is not provided with the abutment portion 38 (see FIG. 1) of the first embodiment, and is provided with a cylinder 114 instead of the abutment portion 38 (see FIG. 1). there is

The outer diameter of the cored bar 112 is slightly smaller than the inner diameter of the hose 104 and can be inserted into the hose 104 from the tip 104A of the hose 104 . The cylinder 114 includes a body portion 118 installed on the base portion 116 and a moving body 120 that moves toward or away from the clamp 34 with respect to the body portion 118 . A metal core 112 is detachably held in the moving body 120 . The core bar 112 is replaceable according to the size of the hose 104 . The core metal 112 is inserted into the hose 104 by moving the moving body 120 in the direction of approaching the clamp 34 (in the direction of arrow H). At that time, the cored bar 112 is inserted up to a position including the cutting position of the hose 104 by the cutting blade 18 . Controller 90 controls the operation of cylinder 114 .

The cutting device 110 also includes a feeding device 122 that feeds the hose 104 toward the clamp 34 (in the direction of arrow G). The feeding device 122 comprises a pair of conveyor belts 124A, 124B arranged on both sides of the hose 104. As shown in FIG. The conveyor belts 124A, 124B are endless belts, and are wound around a pair of rolls 126, 128 spaced apart. When one of the rolls 126 and 128 is rotationally driven, the conveying belts 124A and 124B rotate in the directions of the arrows, respectively, and the hose 104 is fed toward the clamp 34 (in the direction of the arrow G). An encoder 130 is provided next to one transport belt 124A so as to be in contact with the hose 104 . The encoder 130 detects the feeding amount of the hose 104 by the feeding device 122 . A detection signal from the encoder 130 is input to the control device 90 , and the operation of the feeding device 122 is controlled by the control device 90 . As a result, the distal end portion 104A of the hose 104 is sent to an appropriate position beyond the clamp 34. As shown in FIG.

In the cutting device 110 described above, in addition to the actions and effects of the same configuration as the cutting device 10 (see FIG. 1) of the first embodiment, the following actions and effects are obtained. A metal core 112 is inserted into the interior of the hose 104 so as to include the cutting position of the hose 104 by the cutting blade 18 . That is, since the core metal 112 that supports the hose 104 from the inner peripheral surface side is provided at the position where the cutting blade 18 is pressed against the hose 104, the bending of the hose 104 inward in the radial direction is suppressed. It can be cut (cut) easily.

For example, if the hose 104 is a soft rubber hose, without the metal core 112, the thick portion of the hose 104 may escape to the inner peripheral side and cannot be cut. In the cutting device 110 described above, even if the hose 104 is a soft rubber hose, the core metal 112 is inserted inside the hose 104, so that the hose 104 can be easily cut (cut).

In addition, in the first and second embodiments, the slant surface 50 is provided with the spigot groove 56 arranged along the axial direction of the pipe 102, and the sliding surface 54 is provided with the protrusion 70 to be inserted into the spigot groove 56. However, the invention is not limited to this configuration. For example, a groove may be provided on the sliding surface along the axial direction of the pipe, and a protrusion inserted into the groove may be provided on the inclined surface.

Further, in the first and second embodiments, the draw pipe 52 is rotated together with the chuck body 12 by the rotating device 22, but the present invention is not limited to this configuration. For example, a structure may be adopted in which the chuck body is rotated by a rotating device and the moving part such as the draw pipe is not rotated.

Although the present invention has been described in detail with respect to particular embodiments, it should be understood that the invention is not limited to such embodiments and that various other embodiments are possible within the scope of the invention. clear to the trader.

10 cutting device 12 chuck body 16 chuck claw 18 cutting blade 18A blade 20 moving device 22 rotating device 34 clamp (holding member)
50 Inclined surface 52 Draw pipe (moving part)
54 sliding surface 56 spigot groove (groove)
70 projection 102 pipe 104 hose (pipe)
110 Cutting device 112 Core metal (core part)

Claims (3)

a chuck body;
a holding member that holds a pipe to be inserted through the inside of the chuck body;
a plurality of chuck claws provided on the chuck body and extending and retreating in the radial direction of the pipe;
a cutting blade provided on the chuck claw for cutting the pipe;
moving means capable of advancing and retreating the chuck claws in the radial direction of the pipe and pressing the cutting blade against the pipe while advancing the chuck claws in the radial direction of the pipe;
rotating means for rotating the chuck body together with the plurality of chuck claws along the circumferential direction of the pipe;
has
The moving means
an inclined surface provided on a side of the chuck claw facing the pipe and arranged in a direction intersecting the axial direction of the pipe;
a moving part provided closer to the outer peripheral surface of the pipe than the inclined surface and moving along the axial direction of the pipe;
a sliding surface provided on the moving part, which slides on the inclined surface to advance and retreat the chuck claws in the radial direction of the pipe;
a groove provided in one of the sliding surface and the inclined surface and arranged along the axial direction of the pipe;
a protrusion provided on the other of the sliding surface and the inclined surface, inserted into the groove, and guiding the movement of the inclined surface in the radial direction of the pipe;
with
The cutting device , wherein the rotating means rotates the moving part together with the chuck body . 2. The cutting device according to claim 1 , wherein said cutting blade is a circular blade having a blade formed on its peripheral edge, and is rotatably supported by said chuck claws in the circumferential direction. 3. The cutting apparatus according to claim 1 , further comprising a core supporting the pipe from the inner peripheral surface at a position where the cutting blade is pressed against the pipe.

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