JP7807739B2 - Wire saw cutting device and cutting method - Google Patents

Description

This disclosure relates to a wire saw cutting device and cutting method that uses a wire to perform cutting.

When cutting materials such as concrete blocks, a wire saw that rotates a wire at high speed may be used (see, for example, Patent Document 1). The technology described in Patent Document 1 describes a wire saw cutting device that has a main body and a pair of stand sections attached to the main body at a distance. In this wire saw cutting device, the main body has a case member that houses a drive pulley and a first pulley for winding the wire. Each stand section has a hollow offset stand connected to a dust collector, and a tip pulley attached to the tip of the offset stand for winding the wire. When cutting, the stand sections of the wire saw cutting device are inserted into two holes formed in the reinforced concrete block, and the wire saw cutting device is placed so that it comes into contact with the reinforced concrete block.

JP 2016-155220 A

The wire saw cutting device described in the aforementioned Patent Document 1 is a push cutter. Therefore, before cutting, the wire is wound around the tip pulleys of a pair of elongated offset stands, and then positioned at the base end (initial position) between the offset stands. After cutting, the wire is positioned so that it connects the tips of the pair of offset stands in a straight line. Therefore, before the next cut, the wire needs to be loosened and returned to the base end (initial position). Conventionally, the task of loosening the wire in order to return a long wire to its initial position has been performed manually by a human.

A wire saw cutting device that solves the above problem is a wire saw cutting device that uses a wire to cut an object to be cut, and includes a wire drive unit that winds and rotates the wire, a tension applying unit that applies tension to the wire to press the wire against the object to be cut, a pair of arm members whose tips can be inserted into two spaced-apart holes formed in the object to be cut, tip pulleys provided at the tips of the arm members that wind the wire during cutting, and a movable mechanism unit that drives the arm members to move the tip pulleys in the extension direction of the arm members.

A cutting method for solving the above problem involves cutting an object by moving the wire of a wire saw cutting device. The wire saw cutting device includes a wire drive unit that winds and rotates the wire, a tension applying unit that applies tension to the wire to press the wire against the object, a pair of arm members each having a tip pulley at its tip that winds the wire during cutting, and a movable mechanism that drives the arm members to move the tip pulley in the direction of extension of the arm members. Two holes are formed in the object to be cut, spaced apart between the pair of arm members, and the tips of each arm member are inserted into the holes, or while the tips are inserted, the wire wound around the tip pulley cuts between the two holes in the object to be cut. After that, the movable mechanism moves the arm member whose tip is located in the hole to the opposite side from the tip when cutting is complete, and winds up the wire.

According to the present invention, after cutting is complete, the wire can be automatically returned to its original position at the start of cutting by mechanical operation, thereby achieving efficient work.

1 is a perspective view of a wire saw cutting device according to an embodiment. FIG. 2 is a rear view of the wire saw cutting device according to the embodiment. 1 is a side view of a wire saw cutting device according to an embodiment. FIG. 2 is a top view of the wire saw cutting device according to the embodiment. FIG. 2 is a rear view of the main body of the wire saw cutting device according to the embodiment. FIG. 2 is a rear view of the stand of the wire saw cutting device according to the embodiment. 7 is a cross-sectional view taken along line 7-7 in FIG. 4. FIG. 2 is a plan view of a stand portion of the wire saw cutting device according to the embodiment. 10A and 10B are explanatory diagrams illustrating an operation before starting cutting of the wire saw cutting device of the embodiment. 10A and 10B are explanatory diagrams illustrating an operation of the wire saw cutting device of the embodiment immediately after starting cutting. 10A and 10B are explanatory diagrams illustrating an operation during cutting of the wire saw cutting device of the embodiment. 10A and 10B are explanatory views of the operation of the wire saw cutting device of the embodiment when the tip of one arm member reaches the end of the hole during cutting. 10A and 10B are explanatory diagrams illustrating the operation of the wire saw cutting device of the embodiment at the end of cutting. 10A and 10B are explanatory diagrams illustrating an operation of returning the arm member after the end of cutting of the wire saw cutting device of the embodiment.

Hereinafter, an embodiment of a wire saw cutting device and a cutting method will be described with reference to FIGS.
1 to 4 are a perspective view, a rear view, a side view, and a top view, respectively, of a wire saw cutting device 10 according to this embodiment. Note that the wire W1 is not shown in FIG.

1 to 4, the wire saw cutting device 10 includes a main body 20 that includes the wire W1, and a base 40 that is disposed below the main body 20. The base 40 includes a pair of arm members 50a, 50b that extend horizontally perpendicular to the main body 20. Furthermore, the wire saw cutting device 10 includes a control unit that controls each motor, which will be described later, to perform cutting.
5 and 6 are rear views of the main body 20 and the base 40 of the wire saw cutting device 10, respectively.

(Configuration of main body 20)
As shown in FIG. 1, the main body 20 includes a base member 21, a case member 22, an auxiliary base member 24, and frame members F1 and F2.

The base member 21 is a rectangular parallelepiped block member with openings on the top and bottom. The case member 22 is positioned above the base member 21 so as to cover the opening. The case member 22 has an overall rectangular parallelepiped shape with a width of approximately 1.5 m, a length of approximately 1.3 m, and a width of approximately 0.3 m. The case member 22 is fixed to the top of the base member 21 so as to extend vertically. One surface of the case member 22 (the surface in the foreground in Figure 2) is made of a transparent plate member. Within the case member 22, the wire W1 is arranged in the vertical plane (second surface).

As shown in Figure 5, the internal space of the case member 22 houses a drive pulley 25, a first pulley 26, a second pulley 27, and a third pulley 28. A wire W1 is wound around each pulley (25-28). This wire W1 is a diamond wire used in known dry wire saw cutting devices.

The drive pulley 25 functions as a wire drive unit, has a larger diameter than the first to third pulleys 26 to 28, and transmits rotational force to the wire W1. For this reason, a drive motor 30 that rotates the drive pulley 25 is attached to the back surface of the case member 22. In this embodiment, a servo motor is used as the drive motor 30.

The first pulley 26 is a tension feed pulley that functions as a tension applying unit and applies tension to press the wire W1 against the workpiece. The first pulley is provided with a tension adjustment unit that adjusts the applied tension to a constant level. The first pulley 26 is positioned so that it can move vertically, allowing the tension to be adjusted by this tension adjustment unit.

The second pulley 27 is a winding pulley and is used to wind up the wire W1 when cutting is complete. In this embodiment, two second pulleys 27 that move in conjunction with each other are used. Each second pulley 27 is arranged to be movable vertically, similar to the first pulley 26.

A third pulley 28 (guide pulley) whose position is fixed is disposed between the drive pulley 25, the first pulley 26 and the second pulley 27.
A slit through which the rotation shafts of the pulleys (26, 27) pass is formed in the front surface (rear surface in FIG. 2 ) of the case member 22, corresponding to the movable range of the first pulley 26 and the second pulley 27. This slit is covered with a covering member 29. The covering member 29 is made of a flexible material and is arranged around the movable range of the pulleys (26, 27) to close the slit.

1, a rectangular parallelepiped auxiliary base member 24 is attached to the front side of the base member 21. A frame member F1 is fixed to the upper surface of this auxiliary base member 24. The frame member F1 has a rectangular frame shape that is open at the bottom.
A plurality of frame members F2 are provided to connect the frame member F1 and the rear surface of the case member 22.

Furthermore, guide bars 31 and 32 are erected on the auxiliary base member 24. These guide bars 31 and 32 are provided at positions corresponding to the first pulley 26 and the second pulley 27. The guide bars 31 and 32 are respectively provided with a first moving body and a second moving body (not shown) of a movement mechanism that moves the first pulley 26 and the second pulley 27. A movement motor 34 is attached to the first moving body, which moves the position of the first pulley 26 while adjusting the tension. This movement motor 34 moves the first pulley 26 at a speed corresponding to the cutting speed and applied tension of the wire saw cutting device 10. A movement motor (not shown) is attached to the second moving body, which moves the position of the second pulley 27 to wind up the wire W1.

As shown in FIG. 2, L-block-shaped mounting members 35a and 35b, which protrude downward and extend forward, are spaced apart from each other on the underside of the auxiliary base member 24. These mounting members 35a and 35b are located outside the arm members 50a and 50b housed in the mount unit 40, which will be described later.

As shown in Figure 5, a conversion pulley 36a is rotatably attached to the outer right side of mounting member 35a. Furthermore, a conversion pulley 36b is rotatably attached to the outer left side of mounting member 35b. The conversion pulleys 36a and 36b are positioned to wind the ends of the wire W1 wound around the first pulley 26 and drive pulley 25. These conversion pulleys 36a and 36b convert the extension direction of the wire W1 emerging downward from the case member 22 from a vertical direction to a horizontal direction (front-to-back direction).

Furthermore, standby pulleys 37, 38 are attached to the underside of mounting members 35a, 35b so as to be rotatable in the horizontal direction. These standby pulleys 37, 38 wind the wire W1 when it is not wound around the tip pulley 57 (described below) during non-cutting. Furthermore, these standby pulleys 37, 38 convert the extension direction of the wire W1 from the conversion pulleys 36a, 36b from the front-to-back direction to the left-to-right direction.

As shown in FIG. 2, the standby pulleys 37 and 38 are disposed at the same height as the tip pulleys 57 of the arm members 50a and 50b, which will be described later.
Therefore, the wire W1 is wound from the standby pulley 38 around the conversion pulley 36b, the drive pulley 25, the third pulley 28, the second pulley 27, the third pulley 28, the second pulley 27, the third pulley 28, the first pulley 26, and the conversion pulley 36a in that order, before reaching the standby pulley 37.
As shown in FIG. 8, the distal end pulleys 57 of the pair of arm members 50a, 50b, which wind the wire W1 when cutting, are disposed between the standby pulleys 37, 38.

(Configuration of the stand unit 40)
1 has a base 41 having a box-like shape with an open front. This base 41 has a size corresponding to the base member 21 and auxiliary base member 24 of the main body 20 when both ends of these base members are placed on top of it. Furthermore, an opening corresponding to the interior of the case member 22 is provided on the top surface of this base 41. If the wire W1 housed in the case member 22 becomes loose, it can be placed inside the base 41 through this opening.

A dust collection cover 43 is provided in front of the base 41. This dust collection cover 43 has a rectangular frame shape and is provided to cover the periphery of an opening provided on the front surface. Furthermore, a sealing member (not shown) is attached to the front surface of this dust collection cover 43 so that it protrudes. The sealing member deforms according to the wall surface of the workpiece that the wire saw cutting device 10 comes into contact with, and tightly seals the connection between this wall surface and the dust collection cover 43. Furthermore, two dust collection pipes 43a are provided, one above the other, on one side of the dust collection cover 43. The dust collection pipes 43a are connected to a dust collection device (not shown) via a hose (not shown).

As shown in FIG. 4 , a pair (two) of arm feed mechanisms 45 are provided on a fixed plate 44 attached to the base 41. These pair of arm feed mechanisms 45 have the same configuration, but with the left and right reversed. Each arm feed mechanism 45 functions as a movable mechanism that moves the arm members 50 a, 50 b back and forth. In this embodiment, the arm feed mechanism 45 is a linear motion mechanism that moves the arm members 50 a, 50 b linearly back and forth. The arm feed mechanism 45 includes a motor 46 that can rotate forward and backward. The motor 46 is fixed by a connection part (not shown) that incorporates a rotation shaft 46 a.
As shown in FIG. 6, a pinion gear 47 is provided on a rotary shaft 46 a of the motor 46 .

The arm members 50a and 50b shown in Figure 4 have the same configuration and include a rod-shaped portion 51 that extends in the extension direction and has a cross-sectional shape of a hollow rectangular frame. A circular pipe 52 is welded to the end of this rod-shaped portion 51. This circular pipe 52 is connected to a dust collection device (not shown) via a hose (not shown).

As shown in Figure 3, a rack 53 extending in the extension direction is fixed to the underside of the rod-shaped portion 51. This rack 53 meshes with the pinion gear 47 of the rotation shaft 46a of the motor 46 of the arm feed mechanism 45 shown in Figure 4, so that the entire arm members 50a, 50b move back and forth as the motor 46 rotates.

4, a tip pulley 57 is rotatably provided on a tip 55 of the rod-shaped portion 51 via a fixing member 56. This tip pulley 57 winds the wire W1 around it when cutting.
Furthermore, as shown in FIGS. 3 and 7, two guide members 58a and 58b are provided on the tip side of the rod-shaped portion 51 relative to the tip pulley.

As shown in Figure 7, guide members 58a and 58b are arranged above and below, spaced apart by the thickness (height) of tip pulley 57. Guide members 58a and 58b are symmetrical about the horizontal axis. Each guide member 58a and 58b is provided with two ball casters as sliding members. Each ball caster is positioned at an angle θ1 from the vertical axis. A ball 59 at the tip of each ball caster protrudes radially from rod portion 51 so as to abut against the inner circumferential surface of the hole (core holes h11 and h12, described below) into which rod portion 51 is inserted. In this case, ball 59 of guide member 58a is positioned opposite ball 59 of guide member 58b. When each ball 59 abuts against the inner circumferential surface of the hole (core holes h11 and h12), it supports the tip of rod portion 51 at the center of the hole while abutting against this inner circumferential surface and rolling.

(Cutting method)
Next, a cutting method using the wire saw cutting device 10 configured as described above will be described with reference to Figures 9 to 14. Figures 9 to 14 are plan cross-sectional views for explaining the cutting method. In these figures, cross-sectional hatching has been omitted for the wire saw cutting device 10 to make it easier to see. Here, a case will be described in which the block 70 is cut horizontally (horizontal cutting) to cut out a portion of the reinforced concrete block 70 that is the cutting target. Furthermore, for easier viewing, the hatching of the horizontally cut portion has been removed.

As shown in Figure 9, this horizontal cutting involves first drilling two holes. Specifically, a known core drill is used to form two spaced-apart, cylindrical core holes h11 and h12 in the block 70. These core holes h11 and h12 are formed at an interval corresponding to the distance between the pair of arm members 50a and 50b. These core holes h11 and h12 are then formed to extend horizontally from the side of the block 70 (the bottom surface in the figure).

Next, the wire saw cutting device 10 is installed. Specifically, the lifted wire saw cutting device 10 is placed on the side of the block 70 where the core holes h11 and h12 are open. In this case, the wire saw cutting device 10 is positioned so that the centers of the core holes h11 and h12 are aligned with the centers of the arm members 50a and 50b. The wire saw cutting device 10 is then pressed against the side of the block 70 so that the sealing member of the dust collection cover 43 is in close contact with the block 70. In this state, the tips of the arm members 50a and 50b are positioned flush with or behind the tips of the standby pulleys 37 and 38, and the wire W1 is in its initial position, with no slack, between the standby pulleys 37 and 38.

Then, the disconnection process is executed in response to an instruction signal from the control unit.
First, the suction start process is executed. Specifically, the dust collector connected to the dust collection pipe 43a of the dust collection cover 43 of the base 41 and the circular pipes 52 of the arm members 50a and 50b is operated. This causes air to be discharged from inside the dust collection cover 43, the base 41, the base member 21, and the case member 22 via the ends of the dust collection pipe 43a and the circular pipes 52.

Next, the control unit drives the drive motor 30. This rotates the drive pulley 25, causing the wire W1 wound around the drive pulley 25 to rotate at high speed.
In this case, the first pulley 26 is used to perform the initial tension adjustment process. Specifically, in order to keep the tension of the wire W1 constant, the control unit drives the movement motor 34 to move the first moving body in the vertical direction. This adjusts the position of the first pulley 26, thereby adjusting the tension.

Next, the control unit drives the motor 46 of the right-side arm feed mechanism 45. As a result, the rotational force of the motor 46 is converted into a linear force for the arm member 50a via the pinion gear 47 and rack 53, causing the arm member 50a to move forward. When the guide members 58a and 58b of the arm member 50a are inserted into the core hole h11, the ball 59 slides while abutting against the inner surface of the core hole h11. As a result, the arm member 50a is inserted while being guided into the core hole h11.

After that, as shown in Figure 10, when the tip pulley 57 of the arm member 50a moves forward beyond the tips of the standby pulleys 37, 38, the tip pulley 57 hooks onto the wire W1, which is rotating at high speed. Then, as the arm member 50a moves further forward, the tip pulley 57 moves forward while pulling the wire W1. In this case, the first pulley 26 moves vertically within the case member 22 in accordance with the tension of the wire W1, adjusting the length and tension of the wire W1.

As the arm member 50a moves forward, the wire W1 rotates at high speed and cuts the block 70. In this case, the wire W1 wound around the standby pulley 37, the tip pulley 57 of the arm member 50a, and the standby pulley 38 cuts the block 70. When the wire W1 begins cutting the block 70, dust (cutting powder) is generated by the cutting. This cutting powder is sucked into the operating dust collector via the dust collection tube 43a and the end of the circular tube 52 and is discharged outside the wire saw cutting device 10.

Then, as shown in Figure 11, after a predetermined time has elapsed since the right-side arm feed mechanism 45 was driven (for example, after arm member 50a has advanced 50 mm), the control unit also drives the motor 46 of the left-side arm feed mechanism 45. This causes arm member 50b to advance. In this case, as with arm member 50a, when the tip 55 of arm member 50b is inserted into core hole h12, arm member 50b is guided into core hole h12 by the balls 59 of guide members 58a and 58b.

Furthermore, as the arm member 50b moves forward, the tip pulley 57 of the arm member 50b hooks onto the wire W1, which is rotating at high speed, and then moves forward while pulling the wire W1. In this case, too, the first pulley 26 moves in accordance with the tension of the wire W1, adjusting the length and tension of the wire W1.

As a result, as the arm members 50a and 50b move forward, the wire W1 rotates at high speed and cuts the block 70. In this case, the wire W1 wound around the standby pulley 37, the tip pulley 57 of the arm member 50a, the tip pulley 57 of the arm member 50b, and the standby pulley 38 cuts the block 70.

Then, as shown in Figure 12, the tip 55 of the arm member 50a arrives at the tip of the core hole h11. In this case, the control unit stops the motor 46 of the right-side arm feed mechanism 45. This stops the advancement of the arm member 50a. At this time, the motor 46 of the left-side arm feed mechanism 45 continues to drive, causing the arm member 50b to continue to advance.

13, when the tip 55 of the arm member 50b reaches the tip of the core hole h12, the control unit stops the motor 46 of the left arm feed mechanism 45. This stops the forward movement of the arm member 50b. Furthermore, the control unit stops the drive motor 30.
As a result of the above, the region between the core holes h11 and h12 on the side surface side of the block 70 (lower side in the drawing) than the wire W1 is cut in the vertical direction on the horizontal plane.

Next, as shown in Figure 14, the control unit rotates the motors 46 of the pair of arm feed mechanisms 45 in the opposite direction to that used during cutting. This causes the arm members 50a, 50b to move backward. Even in this case, the arm members 50a, 50b move while being guided by the balls 59 in the core holes h11, h12. Here, the motor 46 of the right arm feed mechanism 45 may be driven slightly earlier so that one arm member 50a moves back slightly (for example, 50 mm) earlier.

The wire W1 is wound by moving the second pulley 27 as the arm members 50a and 50b retract. Here, the length and tension of the wire W1 are adjusted by moving the first pulley 26 in conjunction with the arm feed mechanism 45. In this case, the wire W1 moves gradually out of the block 70 via the cutting surface.

Then, as shown in Figure 9, when the tip of each arm member 50a, 50b reaches a position behind the tip of the standby pulleys 37, 38, the control unit stops the motor 46 of each arm feed mechanism 45. In this case, the wire W1 comes off the tip pulleys 57 of the arm members 50a, 50b and returns to the state before cutting, where tension is applied between the standby pulleys 37, 38. Then, the dust collector is stopped.

(effect)
The wire saw cutting device 10 of this embodiment includes an arm feed mechanism 45 that moves the arm members 50a, 50b back and forth. After cutting the block 70 with the wire W1, the motor 46 of the arm feed mechanism 45 is rotated in the reverse direction to retract the arm members 50a, 50b from a state in which the tip ends of the arm members 50a, 50b are positioned at the back of the core holes h11, h12 (opposite the openings). This causes the second pulley 27 to move, thereby winding up the wire W1. This returns the arm members 50a, 50b and the wire W1 to their initial positions before cutting began.

According to this embodiment, the following effects can be obtained.
(1) The wire saw cutting device 10 of this embodiment includes an arm feed mechanism 45 that moves each arm member 50a, 50b back and forth. By rotating the motor 46 of the arm feed mechanism 45, the wire W1, which is hooked on each arm member 50a, 50b and moves at high speed, is pushed forward, cutting the block 70 in a horizontal plane. When cutting is completed, the tips of the arm members 50a, 50b are positioned at the back of the core holes h11, h12 (on the side opposite the openings). From this state, the arm members 50a, 50b are retracted, and the wire W1 is wound up. This allows the arm members 50a, 50b and the wire W1 to return to their positions before cutting began, allowing the next cut to be performed efficiently.

(2) The wire saw cutting device 10 of this embodiment comprises a main body 20 extending vertically and a base 40 located below the main body 20. The base 40 comprises arm members 50a, 50b that protrude forward and backward from the base 40 and move horizontally, and an arm feed mechanism 45 that linearly moves the arm members 50a, 50b. This allows the tip pulleys 57 of the arm members 50a, 50b, which hook the wire W1 during cutting, to be efficiently moved within the core holes h11, h12.

(3) The wire saw cutting device 10 of this embodiment comprises a main body 20 and a base 40 that can be separated into upper and lower parts. The base 40 comprises arm members 50a, 50b to which a tip pulley 57 is attached, which hooks the wire W1 during cutting. The main body 20 comprises standby pulleys 37, 38 that are flush with the tip pulley 57 and hold the wire W1 during standby. As a result, the wire W1 that is wound around the tip pulley 57 during cutting is separated from the base 40 and stored in the main body 20 when not cutting. Therefore, when replacing the wire W1 due to wear or other reasons, only the main body 20 can be separated from the base 40 and replaced, rather than the entire wire saw cutting device 10.

(4) In this embodiment, guide members 58a, 58b equipped with balls 59 are provided at the tip end 55 of each arm member 50a, 50b, further forward than the tip pulley 57. As a result, the balls 59 at the tips of the arm members 50a, 50b roll while abutting against the inner surfaces of the core holes h11, h12. Therefore, the arm members 50a, 50b can be smoothly inserted into the core holes h11, h12 while being guided by the balls 59 to be positioned at the centers of the core holes h11, h12.

(5) In this embodiment, one arm member 50a of the pair of arm members 50a, 50b is cut first. As a result, the force of the arm member 50a moving forward acts as a pressing force on the wire W1, allowing for more efficient cutting than when the pair of arm members 50a, 50b are moved side-by-side.

This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.
The wire saw cutting device 10 of the above embodiment includes a pinion gear 47 mounted on the rotating shaft 46a of the motor 46 of the arm feed mechanism 45, and arm members 50a, 50b with a rack 53 attached to the underside that threads onto the pinion gear 47. The configuration for moving the distal ends of the arm members 50a, 50b, which are provided with a distal pulley 57 around which the wire W1 is wound, back and forth is not limited to the configuration using the rack 53 and pinion gear 47. For example, the arm members 50a, 50b may be moved back and forth using an air cylinder or actuator. Furthermore, the mechanism for moving the distal pulley 57 back and forth is not limited to linearly moving the arm members 50a, 50b back and forth. For example, the arm members 50a, 50b may be configured to be extendable and contract during cutting and after cutting. Specifically, the arm members may be configured as two nested hollow tubular members with rectangular cross sections of different sizes. When cutting, the tubular member of the arm member is slid to extend it (the tip advances deeper into the hole), and after cutting is complete, it is returned to its nested state to contract it (the tip retreats).

- In the above embodiment, a second pulley 27 is provided in addition to the first pulley 26. Depending on the length of the wire W1 corresponding to the cutting area, the second pulley may be omitted or fixed.

- In the above embodiment, during cutting, arm member 50a advances before arm member 50b. Also, after cutting, arm member 50a retreats before arm member 50b. The method of moving arm members 50a and 50b in core holes h11 and h12 is not limited to this. For example, during and after cutting, two motors 46 may be driven so that the tips of arm members 50a and 50b are aligned side by side.

- In the above embodiment, the wire saw cutting device 10 cuts the block 70 with the wire W1 wound around the tip pulleys 57 at the tips of the arm members 50a and 50b while inserting the arm members 50a and 50b. The cutting method is not limited to cutting while inserting the arm members 50a and 50b. For example, the arm members 50a and 50b can be inserted into the core holes h11 and h12 (first) before cutting. In this case, the wire W1 is wound around the tip pulleys 57 and positioned at the base of the arm members 50a and 50b. Then, when cutting, tension is applied to the wire W1 while it is positioned on the side of the core holes h11 and h12 and the side of the block 70.

Next, the technical ideas that can be understood from the above-described embodiment and other examples will be described below.
(a) A wire saw cutting device described in any one of claims 1 to 3, characterized in that a sliding member that can rotate while abutting against the inner surface of the hole is attached to the arm member further tip than the tip pulley.

θ1...angle, F1, F2...frame member, W1...wire, h11, h12...core hole, 10...wire saw cutting device, 20...main body, 21...base member, 22...case member, 24...auxiliary base member, 25...drive pulley, 26...first pulley, 27...second pulley, 28...third pulley, 29...covering member, 30...drive motor, 31, 32...guide bar, 34...movement motor, 35a, 35b...mounting member, 36a, 36 b...conversion pulley, 37, 38...standby pulley, 40...mounting section, 41...base section, 43...dust collection cover, 43a...dust collection tube, 44...fixed plate, 45...arm feed mechanism, 46...motor, 46a...rotating shaft, 47...pinion gear, 50a, 50b...arm member, 51...rod-shaped section, 52...circular tube, 53...rack, 55...tip section, 56...fixed member, 57...tip pulley, 58a, 58b...guide member, 59...ball, 70...block.

Claims (4)

In a wire saw cutting device that cuts an object using a wire,
a wire driving unit that winds and rotates the wire;
a tension applying unit that applies tension to the wire to press the wire against the object to be cut;
a pair of arm members each having a tip end that can be inserted into two spaced apart holes formed in the object to be cut;
a tip pulley provided at a tip of the arm member that winds the wire in a first plane parallel to the extending direction of the arm member when the wire is cut;
a standby pulley disposed outside the pair of arm members so as to wind the wire within the first plane;
a movable mechanism that drives the arm member to move the tip pulley in the extension direction of the arm member ,
A wire saw cutting device characterized in that , when not cutting, the wire is detached from the tip pulley and wound around the standby pulley . Further provided with a conversion pulley,
the wire driving unit and the tension applying unit wind the wire in a second plane perpendicular to the first plane,
The wire saw cutting device according to claim 1 , wherein the conversion pulley changes the winding direction of the wire between the first plane and the second plane. a case member that houses the wire driving unit and the tension applying unit and that positions the wire within the second plane;
a main body including the wire driving unit, the tension applying unit, the case member, and the wire;
a base unit including the arm member, the tip pulley, and the movable mechanism unit, the base unit being detachably attached to the main body unit and provided below the main body unit,
3. The wire saw cutting device according to claim 2, wherein the wire is detached from the tip pulley and wound around the standby pulley when not cutting. A cutting method for cutting an object by moving a wire of a wire saw cutting device, comprising:
The wire saw cutting device is
a wire driving unit that winds and rotates the wire;
a tension applying unit that applies tension to the wire to press the wire against the object to be cut;
A pair of arm members;
a tip pulley provided at a tip of the arm member that winds the wire in a first plane parallel to the extending direction of the arm member when the wire is cut;
a standby pulley disposed outside the pair of arm members so as to wind the wire within the first plane;
a movable mechanism that drives the arm member to move the tip pulley in the extension direction of the arm member,
two holes are formed in the object to be cut at a distance between the pair of arm members;
Inserting the tip of each arm member into each of the holes, or while inserting the tip, cutting the object between the two holes with the wire wound around the tip pulley,
the movable mechanism moves the arm member, the tip of which is positioned in the hole, to the opposite side from the tip when cutting is completed, and winds up the wire;
A cutting method characterized in that, when not cutting, the wire is detached from the tip pulley and wound around the standby pulley .