JP7212905B2 - wire cutting machine - Google Patents

Description

The present disclosure relates to a wire cutting machine that cuts an object to be cut, such as a floor slab, with a wire.

Conventionally, there has been proposed a cutting device that uses a wire to cut a concrete floor slab of a bridge. The cutting device cuts the floor slab by passing a wire through the drive pulley and the driven pulley and rotating the drive pulley to drive the wire.

Patent Document 1 describes a rail that is placed on both sides of an object to be cut, a plurality of driven pulleys that travel back and forth on the rail, a driving pulley that transmits power to the driven pulley, and a wire length adjustment between the pulleys. and a mechanism for cutting a workpiece between two rails by passing a wire between driven pulleys and turning the machine. As a result, it is possible to apply an appropriate pressure to the object to be cut while preventing the wire from being subjected to a load in the direction of expansion and contraction.

JP 2004-66382

However, in Patent Document 1, the drive pulley is provided at a location separate from the driven pulley, and power is transmitted from the drive pulley to the driven pulley. A mechanism for adjusting the wire length between the pulleys is also provided separately from the driven pulley. As a result, the configuration of the entire machine becomes complicated and large, and it cannot be used in a narrow space.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to simplify and downsize the structure of the entire opposed rail type wire cutting machine.

The wire cutting machine of the present disclosure includes a first rail and a second rail facing each other in a first direction with an object to be cut therebetween and extending in a second direction intersecting the first direction, and attached to the first rail. a first moving device comprising a first pulley; a second moving device mounted on the second rail and comprising a second pulley; a mechanism provided on at least one of the first pulley and the second pulley to supply power, the first moving device moving along the first rail, and the second moving device moving along the first rail; The object is cut by moving along the second rail.

According to the present disclosure, an object to be cut can be cut by a rail-facing wire cutting device without providing a separate mechanism for driving the wire.

In the wire cutting machine of the present disclosure, the second moving device automatically moves along the second rail.

According to the present disclosure, the operator only needs to control the first moving device, so it is possible to simplify the work and reduce the number of workers.

The wire cutting machine of the present disclosure includes a detection unit that detects the distance between the first pulley and the second pulley, and when the detection unit detects that the distance is equal to or greater than a predetermined distance, and a control unit for controlling to decelerate or stop either the first moving device or the second moving device.

According to the present disclosure, the distance between the first pulley and the second pulley does not exceed a certain distance, and excessive load can be prevented from being applied to the wire.

In the wire cutting machine of the present disclosure, the second moving device moves at a higher speed than the first moving device, and when the detection unit detects that the distance has become equal to or greater than a predetermined distance, the The control unit performs control to decelerate or stop the second moving device.

According to the present disclosure, the distance between the first pulley and the second pulley does not exceed a certain distance, and excessive load can be prevented from being applied to the wire.

In the wire cutting machine of the present disclosure, after the second moving device decelerates or stops, when the detection unit detects that the distance has become less than a predetermined distance, the control unit controls the second Accelerates or resumes movement of the moving device.

According to the present disclosure, after the load on the wire is reduced, the cutting of the object to be cut can proceed without the operator performing any particular operation on the second moving device.

In the wire cutting machine of the present disclosure, the second moving device connects the second moving device and a second pulley, and intersects the second moving device in the first direction and the second direction. An arm rotatable around an axis extending in a third direction is provided, and the detector detects a rotation angle of the arm corresponding to the distance.

According to the present disclosure, it is possible to detect the length of the distance between the first pulley and the second pulley with a simple configuration.

In the wire cutting machine of the present disclosure, the detection unit is a switch, and the switch is pushed by the arm to operate when the arm rotates, and detects that the distance is equal to or greater than a predetermined distance. do.

According to the present disclosure, it is possible to detect the length of the distance between the first pulley and the second pulley with a simple configuration.

In the wire cutting machine of the present disclosure, the object to be cut is a floor slab, a first rail is arranged above the floor slab, a second rail is arranged below the floor slab, and a pulley cover surrounds a second pulley. Prepare.

According to the present disclosure, it is possible to prevent the dissipation of cutting water that is applied to the wire to suppress heat generation during wire cutting or to suppress dust scattering.

In the wire cutting machine of the present disclosure, the upper portion of the pulley cover is open, and the lower portion of the pulley cover is formed with a drain port.

According to the present disclosure, it is possible to prevent the cutting water from diffusing by collecting the cutting water falling from the cutting groove and draining it to a designated location.

According to the present disclosure, since a mechanism for driving the wire is not provided at a separate location in the opposing rail type wire cutting machine, the configuration of the entire machine can be simplified and made compact.

It is a top view which shows a wire cutting machine briefly. 2 is a cross-sectional view taken along line II-II shown in FIG. 1; FIG. It is a partially enlarged front view schematically showing the second moving device 22, the second rail 21, and the like. It is a right view which briefly shows the 2nd moving apparatus 22, the 2nd rail 21 grade|etc.,. FIG. 4 is a cross-sectional view of the wire cutting machine during a cutting operation; It is a front view which shows briefly the 2nd pulley 23 provided with a pulley cover, the 2nd moving device 22 grade|etc.,. It is a right side view which shows briefly the 2nd pulley 23 provided with a pulley cover, the 2nd moving device 22 grade.

A wire cutting machine according to an embodiment of the present disclosure will be described below based on the drawings.

(Embodiment 1)
FIG. 1 is a plan view schematically showing a wire cutting machine in Embodiment 1, and FIG. 2 is a cross-sectional view taken along line II-II shown in FIG. In this embodiment, the floor slab F of the bridge is the object to be cut, but the object to be cut is not limited to the floor slab of the bridge, and may be, for example, a concrete wall.

In this embodiment, for the sake of convenience, the front-rear, left-right, and up-down directions shown in each drawing define the "top", "bottom", "front", "rear", "left", and "right" of the wire cutting machine. . In addition, the first direction, the second direction, and the third direction in the claims correspond to the up-down direction, the left-right direction, and the front-rear direction. In the following description, the up/down, left/right, and front/rear directions defined in this way will be used.

In this embodiment, a configuration for cutting the floor slab F from left to right will be described.

The wire cutting machine comprises a first rail 11 and a second rail 21 . The first rail 11 and the second rail 21 are arranged so as to face each other substantially in parallel with the floor slab F interposed therebetween. The first rail 11 extends in the horizontal direction on the floor slab F, and the second rail 21 extends in the horizontal direction on the pedestals S arranged below the floor slab F. . A first rack gear 111 extending in the horizontal direction is formed on the upper portion of the first rail 11 , and a second rack gear 211 extending in the horizontal direction is formed on the upper portion of the second rail 21 .

The wire cutting machine comprises a first moving device 12 . The first moving device 12 comprises a first moving platform 150 . A first moving table 150 is attached to the first rail 11, and the first moving table 150 is supplied with a first pulley 13 that rotates with the front-rear direction as the rotation axis direction, and power for rotating the first pulley 13. A driving device 14, a gear (not shown) that meshes with the first rack gear 111 and rotates with the front-rear direction as the rotational axis direction, and a driving mechanism (not shown) that rotates the gear are attached. The gear is rotated by the drive mechanism, and the first moving table 150 moves in the left-right direction on the first rail 11 . Therefore, the first moving device 12 can move in the left-right direction on the first rail 11 .
The wire cutting machine comprises a second moving device 22 . The second moving device 22 has a second moving table 250 . A second moving table 250 is attached to the second rail 21 , and a second pulley 23 that rotates with the front-rear direction as the rotation axis direction is attached to the second moving table 250 . In addition, the second moving device 22 can move in the left-right direction on the second rail 21, although other detailed configurations provided in the second moving device 22 will be described later.

As a preparation for cutting the floor slab F by a wire cutting machine, the floor slab F is provided with two through holes Fh for passing the wires W in the vertical direction by boring or the like. The two through-holes Fh are formed at intervals of approximately the same length as the diameters of the first pulley 13 and the second pulley 23 . The shape of the through hole Fh is not limited as long as it is large enough for the wire W to pass through.
The wire W passes through the two through holes Fh, is hung over the first pulley 13 and the second pulley 23, and is connected in a loop. When the driving device 14 supplies power to the first pulley 13 to rotate it, the wire W is driven.
In this state, when the first moving device 12 and the second moving device 22 move rightward (hereinafter referred to as rightward movement), the floor slab F is cut by the wire W, and a cut groove is formed in the floor slab F. .

In this embodiment, rightward movement of the first moving device 12 is remotely controlled by an operator manually operating an operating lever (not shown), while rightward movement of the second moving device 22 is automatically controlled. be done.

3 is a partially enlarged front view schematically showing the second moving device 22, the second rail 21, etc. in this embodiment, and FIG. 4 is a right side view schematically showing the second moving device 22, the second rail 21, etc. is.
The second moving device 22 includes a second moving base 250 that is attached to the second rail and can move on the second rail 21 in the left-right direction. A plurality of rollers 27 for stably moving to the right are attached to the lower portion of the second moving table 250 so as to sandwich the upper portion of the second rail 21 in the front-rear direction. The rotation axis direction of the roller 27 is the vertical direction.

The second moving device 22 has a gear 263 and a motor 262 . The gear 263 is arranged on the left side of the second moving base 250 , is connected to the second moving base 250 via the connecting member 260 , and meshes with the second rack gear 211 formed on the second rail 21 . A motor 262 is arranged on the connecting member 260 . The motor 262 supplies power to the gear 263, and the gear 263 rotates with the front-rear direction as the rotation axis direction, thereby moving the second moving device 22 to the right.

A hinge part 252 is installed at the right end of the upper part of the second moving table 250 .
In addition, the second moving device 22 includes an arm 251 that is generally L-shaped when viewed from the front. One end of the arm 251 is the lower end, the other end is the upper end, and the arm 251 is arranged so that the arm angle 251a faces left. A lower end portion of the arm 251 is connected to the hinge portion 252 . The arm 251 is rotatable with the hinge portion 252 as a fulcrum and with the front-rear direction as the rotation axis direction.
A second pulley rotating shaft 231 is attached to the upper end of the arm 251 and protrudes rearward. The second pulley rotating shaft 231 is fixed to the upper portion of the arm 251 . The second pulley 23 is attached to the second pulley rotating shaft 231, and the second pulley 23 is rotatable with the front-rear direction as the rotating shaft direction.

A damper 253 is installed between the upper portion of the second moving table 250 and the intermediate portion of the side connecting the arm angle 251a of the arm 251 and the lower end of the arm (hereinafter referred to as the base of the arm 251). The damper 253 is composed of a damping portion 253a and a rod 253b. The damping portion 253a is arranged to protrude in the upper right direction from the upper left end of the second moving base 250, and the lower end of the damping portion 253a is rotatably attached to the second moving base 250 with the front-rear direction as the rotation axis direction. ing. The rod 253b further protrudes in the upper right direction from the damping portion, and is rotatably connected to the base of the arm 251 at the upper right end with the front-rear direction as the rotation axis direction. Also, the rod 253b can move forward and backward with respect to the damping portion 253a. A damper 253 limits the movable angle of rotation of the arm 251 .

A switch 254 is installed to the left of the hinge part 252 on the upper part of the second moving table 250 . The switch 254 is a lever-type switch that can rotate with its lower end as a fulcrum and with the front-rear direction as the rotation axis direction. Switch 254 includes a biasing member (not shown) that biases switch 254 to the right. When the arm 251 rotates leftward, the switch 254 is also pushed by the arm and rotates leftward against the biasing force of the biasing member. The switch 254 is activated when it is rotated counterclockwise by a predetermined angle or more from a predetermined basic position. Further, when the arm 251 rotates rightward from the state in which the switch 254 is in operation, the switch 254 is also rotated rightward by the urging force of the urging member, and the rotation angle of the switch 254 from the basic position is the above. When the angle is less than the predetermined angle, the switch 254 is deactivated. However, the switch 254 may be a push-button type switch, in which case a projecting portion is formed on the bottom of the arm 251, and when the arm 251 rotates leftward by a predetermined angle or more and the projecting portion presses the button, It may be a switch that operates at
When the switch 254 is actuated, it sends a signal to the controller 261, which will be described later, to slow down the speed of rightward movement of the second moving device 22. FIG. In addition, the signal may be one instructing to stop, or the signal may be switched in two stages, decelerating in the first stage and instructing to stop in the second stage, or the switching stage may be further subdivided and stepped It may be one that instructs deceleration.

A control unit 261 is installed to the left of the switch 254 on the upper part of the second moving table 250 .
When the control unit 261 receives a signal instructing deceleration or stop, the control unit 261 reduces or stops the right movement speed of the second moving device 22 by weakening or stopping the operation of the motor 262 . Note that the deceleration control method of the second moving device 22 is not limited to this, and for example, the right movement may be decelerated by a transmission. Moreover, the stopping method is not limited to this. For example, the lateral movement may be stopped by operating the clutch or separating the gear 263 from the second rack gear 211 .

FIG. 5 is a cross-sectional view of the wire cutting machine during the cutting operation. The right movement of the first moving device 12 is remotely operated by an operator, and the right movement of the second moving device 22 is automatically controlled. The normal right movement speed of the second moving device 22 is set higher than that of the first moving device 12 .

As the cutting progresses, the second mover 22 leads the first mover 12 as shown in FIG. At this time, the distance between the first pulley 13 and the second pulley 23 increases, and a load is applied to the wire W in the stretching direction. When the distance between the first pulley 13 and the second pulley 23 becomes equal to or greater than a certain distance, the tension of the wire W pulls the second pulley 23 leftward. Then, the arm 251 rotates leftward, and the switch 254 is pushed to rotate leftward. When the switch 254 rotates leftward from the basic position by more than the predetermined angle, the switch 254 is activated.

When the switch 254 is actuated, a signal is sent to the controller 261 instructing the second moving device 22 to slow down or stop the rightward movement speed. Upon receiving the signal, the control unit 261 performs control to slow down or stop the right movement speed of the second moving device 22 .

After the second moving device 22 decelerates or stops, the right movement of the first moving device 12 progresses, and when the distance between the two pulleys becomes less than a certain distance, the load on the wire W in the stretching direction is reduced. At this time, the force with which the wire W pulls the second pulley 23 weakens, and the arm 251 rotates rightward. Then, the switch 254 is also rotated rightward by the urging force of the urging member, and when the rotation angle of the switch 254 from the basic position becomes less than the predetermined angle, the operation of the switch 254 is released.

When the switch 254 is deactivated, a signal is sent to the controller 261 to restart the rightward movement of the second moving device 22 at normal speed. Upon receiving the signal, the control unit 261 performs control to restart the rightward movement of the second moving device 22 at the normal rightward movement speed.

According to this embodiment, the second moving device 22 decelerates or stops before the load on the wire W becomes excessive, and while the second moving device 22 decelerates or stops, the right side of the first moving device 12 moves. By advancing the movement, the distance between the first pulley 13 and the second pulley 23 can be shortened, and the load on the wire W can be reduced. In addition, after the load on the wire W is reduced, the second moving device 22 automatically recovers the speed of rightward movement. It is possible to reduce the work load of the operator involved in cutting.

In the wire cutting machine with the above configuration, the first pulley 13 is provided with the driving device 14, and the distance between the first pulley 13 and the second pulley 23 is controlled by the arm 251, the switch 254, and the control section 261. It has the ability to adjust. For this reason, the wire cutting machine according to the present embodiment does not provide a separate mechanism for driving the wire and a mechanism for matching the wire length and the distance between the pulleys in the facing rail type wire cutting machine. can be adjusted to simplify and compact the configuration of the entire machine.

(Embodiment 2)
In the second embodiment, in addition to the first embodiment, the second pulley 23 is provided with the pulley cover 3 . FIG. 6 is a front view schematically showing the second pulley 23 with a pulley cover, the second moving device 22, etc. FIG. 7 schematically shows the second pulley 23, the second moving device 22, etc. with a pulley cover. It is a right side view.
The points of the second embodiment that differ from the first embodiment will be described below. Configurations other than those described later are common to those of the first embodiment. For this reason, the same reference numerals as in Embodiment 1 are given to the components that are common to Embodiment 1, and the description of those components is omitted.

As shown in FIGS. 6 and 7 , the second pulley rotating shaft cover 232 is attached to surround the portion of the second pulley rotating shaft 231 that is exposed between the second pulley 23 and the arm 251 . A hole into which the second pulley rotating shaft cover 232 is fitted is formed in the pulley cover 3, and the pulley cover 3 is held by fitting the second pulley rotating shaft cover 232 into the hole. The second moving device 22 is provided to surround the second pulley 23 . The holding position of the pulley cover 3 is not limited to this, and while enclosing the second pulley 23, it moves together with the right movement of the second moving device 22, and even if the arm 251 rotates, the second pulley 23 and As long as the wire W and the pulley cover 3 are attached so as not to come into contact with each other, they may be held anywhere.

The upper part of the pulley cover 3 is open, and the cutting water that falls from the cutting groove (when using the wire cutting machine, it is water that is sprinkled on the wire and the cutting part for the purpose of preventing the wire temperature from rising and preventing dust from scattering. The same applies below. ) can be recovered. A drain port 31 is formed in the lower portion of the pulley cover 3, and the cutting water can be drained to an arbitrary location by a hose H connected to the drain port 31. By collecting the cutting water by the pulley cover 3 and draining it by the drain port 31 and the hose H, it is possible to prevent the work area from getting wet and to prevent other works from being hindered.

(Modification)
In the first embodiment, the object to be cut is not limited to floor slabs, and may be, for example, concrete walls or columns. Moreover, the direction in which the first rail 11 and the second rail 21 face each other is not limited to the vertical direction, and may be the left and right direction or the front and rear direction.

In Embodiments 1 and 2, the second moving device may be provided with a driving device that rotates the second pulley. In this case, the driving device 14 may not be provided in the first moving device.

In Embodiments 1 and 2, the movement of the first moving device 12 in the horizontal direction is controlled by the operator's lever operation, but it may be controlled automatically.

In the first and second embodiments, the rightward movement speed of the second moving device 22 may be lower than the rightward movement speed of the first moving device 12 . At this time, when the detection unit detects that the distance between the first pulley 13 and the second pulley 23 has become longer than a certain distance, the first moving device 12 is locked so as not to move to the right. may be configured.

In Embodiments 1 and 2, the detector that detects the distance between the first pulley 13 and the second pulley 23 is not limited to the switch 254 . For example, the hinge portion 252 is provided with a potentiometer whose output voltage changes according to the rotation angle of the arm 251, and the output voltage of the potentiometer detects the distance between the first pulley 13 and the second pulley 23. good too.

The disclosed embodiments 1 and 2 should be considered as examples in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the meaning described above, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

11 1st rail 111 1st rack gear 12 1st moving device 13 1st pulley 14 driving device 150 1st moving table 21 2nd rail 211 2nd rack gear 22 2nd moving device 23 2nd pulley 231 2nd pulley rotating shaft 232 2-pulley rotating shaft cover 250 Second moving base 251 Arm 251a Arm angle 252 Hinge part 253 Damper 253a Damping part 253b Rod 254 Switch 260 Connecting member 261 Control part 262 Motor 263 Gear 27 Roller 3 Pulley cover 31 Drain port S Mounting frame W Wire F Floor slab F
Fh Through hole H Hose

Claims (6)

a first rail and a second rail facing each other in a first direction with an object to be cut interposed therebetween and extending in a second direction intersecting the first direction;
a first moving device attached to the first rail and comprising a first pulley;
a second moving device attached to the second rail and comprising a second pulley;
a wire hung over the first pulley and the second pulley;
a mechanism provided on at least one of the first pulley and the second pulley to supply power;
a detection unit that detects the distance between the first pulley and the second pulley;
a control unit that performs control to decelerate or stop either the first moving device or the second moving device when the detection unit detects that the distance is equal to or greater than a predetermined distance,
The first moving device is manually moved along the first rail, and the second moving device is automatically moved along the second rail to cut the object,
the moving speed of the second moving device is set to a speed higher than that of the first moving device;
The wire cutting machine, wherein when the detection unit detects that the distance has become equal to or greater than a predetermined distance, the control unit decelerates or stops the second moving device. After the second moving device decelerates or stops, when the detection unit detects that the distance has become less than a predetermined distance, the control unit accelerates or resumes movement of the second moving device. The wire cutting machine according to claim 1, wherein the control is performed. The second moving device,
an arm that connects the second moving device and the second pulley and is rotatable about an axis extending in a third direction that intersects the first direction and the second direction with respect to the second moving device; prepared,
The wire cutting machine according to claim 1 or 2 , wherein the detection unit detects a rotation angle of the arm corresponding to the distance. The detection unit is a switch,
4. The wire cutting machine according to claim 3 , wherein the switch is pushed by the arm to operate when the arm rotates, and detects when the distance becomes equal to or greater than a predetermined distance. The object to be cut is a floor slab,
The first rail is arranged above the floor slab and the second rail is arranged below the floor slab,
The wire cutting machine according to any one of claims 1 to 4 , further comprising a pulley cover surrounding the second pulley. The upper part of the pulley cover is open,
The wire cutting machine according to claim 5 , wherein a drain hole is formed in the lower part of the pulley cover.

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