JP2021042529A - Cutting device - Google Patents

Abstract

To improve work efficiency by reducing labor and time required for work.SOLUTION: A cutting device has a wire saw mechanism 4 for cutting a beam material 8 by push-cutting operation by pressing an endless loop-shaped wire saw 2 against the beam material 8 while circulating and driving the wire saw, and performs cutting work by installing the wire saw mechanism 4 on a tip part 11a of a swing arm 11 of a base machine 10 and arranging the wire saw mechanism 4 at a cutting work position by the operation of the swing arm 11. The wire saw mechanism 4 comprises: a base frame 6 supporting the whole of a driving pulley 21 and a series of guide pulleys 22; a guide shaft 3 provided on the tip part 11a of the swing arm 11 and supporting the base frame 6 so as to guide the base frame advance and retreat; a rotating mechanism 7 for rotating the guide shaft 3 together with the base frame 6 about a center axis O of the guide shaft 3 with respect to the tip end 11a of the swing arm 11.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cutting device.

Conventionally, when dismantling an SRC or RC building, a method using a cutting device using a wire saw has been performed as a method that does not use a heavy work machine that causes a large amount of noise and vibration due to a crusher or a breaker. As a cutting device using such a wire saw, for example, as shown in Patent Document 1, an endless loop-shaped wire saw is wound around a drive pulley and a series of guide pulleys to circulate and drive the object to be cut. On the other hand, a device that cuts by biting into it is known.

In each of the cutting devices shown in Patent Document 1, an endless loop-shaped wire saw is wound around the object to be cut so as to surround the object to be cut (that is, the object to be cut is arranged inside the endless loop-shaped wire saw). In that state, the wire saw is pulled in and cut into the object to be cut, which is the so-called "pulling operation". In this case, each time a pillar, a beam, or the like is cut, it is necessary to unloop the wire saw and wind it on the outside of the object to be cut, which is troublesome and time-consuming.
Therefore, as a cutting device, for example, a device for the purpose of performing the cutting work more efficiently has been proposed in Patent Document 2.

In Patent Document 2, a wire saw mechanism that presses a wire saw against an object to be cut and cuts by a push-cut operation is first described with respect to a tip portion of a swing arm of a base machine such as a hydraulic excavator via a guide shaft. At least one or both of the pair of guide pulleys arranged on both sides of the object to be cut can be used as a propulsion pulley that can be moved forward and backward with respect to the base frame by the moving forward / backward drive mechanism. , A configuration is described in which a tension pulley that can be turned and cut by moving the propulsion pulley forward and backward and that can adjust the tension of the wire saw is installed and a gripping device for gripping the object to be cut is installed on the guide shaft. ..

Japanese Unexamined Patent Publication No. 2000-141355 Japanese Patent No. 6041608

However, the conventional cutting device has the following problems.
That is, in the cutting device described in Patent Document 2, it is necessary to rotate the cutting device at a predetermined angle with respect to the mounting bracket at the tip of the arm of the hydraulic excavator, which is a base machine for movement and installation. For example, it is necessary to turn 90 ° to switch from column cutting to girder cutting, or to rotate when cutting in an inverted C shape when cutting girders. Therefore, when rotating with a conventional cutting device, the mounting bolts of the bracket are removed and the cutting device is manually rotated by a plurality of people, which takes time and effort in the setup change work and reduces the work efficiency. There was a problem.
Further, with the conventional cutting device, in the construction in a narrow place, the entire cutting device cannot be automatically rotated in the posture positioning and handling by the base machine, so that the positioning takes time and the work efficiency is lowered. There was a risk.

Further, in the cutting device of Patent Document 2, for example, when cutting a girder, the girder is first positioned and then deposited in the girder. Then, the girder is cut by advancing the cutting frame on the left side when viewed from the driver's seat side with respect to the gripping device for preventing the excavator arm from descending. In this case, since the gripping device is always located on the right side of the cutting frame, if there is a column to be cut on the right side, it interferes with the gripping device to cut the girder in the vicinity of the column, and the column edge. There was a problem that it could not be cut with, and there was room for improvement in that respect.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a cutting device capable of reducing labor and time required for work and improving work efficiency.

In order to achieve the above object, the cutting device according to the present invention has a wire saw mechanism for cutting the object to be cut by pushing the object to be cut by pressing the wire saw in an endless loop shape against the object to be cut while circulatingly driving the wire saw. The wire saw mechanism is attached to the tip of the swing arm of the base machine, and the wire saw mechanism is arranged at the cutting work position by the operation of the swing arm to perform the cutting work. The wire saw mechanism includes a base frame that supports the entire drive pulley and a series of guide pulleys, a guide shaft that is provided at the tip of the swing arm and guides the base frame so as to be able to move forward and backward, and the guide shaft. The base frame and the swing arm are provided with a rotation mechanism that rotates the wire around the central axis of the guide shaft with respect to the tip end portion of the swing arm.

In the present invention, since the guide shaft and the base frame are rotatably provided with respect to the tip of the swing arm of the base machine by a rotation mechanism, the posture of the base frame can be rotated without changing the direction of the swing arm. It can be changed to a predetermined angle position in the direction. That is, the orientation and angle of the wire saw supported by the base frame with respect to the object to be cut can be changed. Further, even when the member equipped in the cutting device and the object to be cut interfere with each other at the time of cutting, for example, the base frame can be rotated 180 ° around the central axis of the guide shaft to eliminate the interference and cut. Become. Therefore, even in the construction in a narrow space, the positioning work of the cutting device with respect to the object to be cut can be efficiently performed.
As described above, in the present invention, for example, when shifting from the cutting work of the beam material extending in the horizontal direction to the cutting work of the pillar material extending in the vertical direction, the setup change work for changing the posture and orientation of the wire saw and the base frame becomes unnecessary. The work time and labor can be reduced, and the work efficiency can be improved.

Further, the cutting device according to the present invention may be characterized in that the rotating mechanism is arranged between the rotating mechanism and the detachable bracket at the tip of the swing arm of the base machine.

In this case, a rotation mechanism is provided near the tip of the swing arm via a bracket, and the rotation mechanism for rotating the guide shaft is located on the swing arm side, so that the bracket can be moved to the swing arm. The guide shaft can be rotated efficiently while it is attached to.

Further, in the cutting device according to the present invention, a gripping device capable of gripping the object to be cut is rotatably provided around the central axis of the guide shaft at the tip of the guide shaft on the side opposite to the base machine side. It may be characterized by being.

In this case, the base frame can be positioned and fixed at a predetermined rotational position by gripping the gripping device on the object to be cut. Therefore, unlike a conventional cutting device that does not have a gripping device, it is not necessary to fix the entire cutting device to the object to be cut by an anchor or the like each time, and the swing arm of the base machine is operated accurately and strictly. Since it is not necessary to perform cutting by doing so, easy and efficient cutting work becomes possible. Further, in the present invention, when the object to be cut is a girder and a column, the gripping device grips the girder side on which one end has already been cut, and when the girder end on the column edge side is cut, the moment of cutting. It is possible to prevent the girders cut at both ends from shaking.
Further, in the present invention, the gripping device and the base frame are separately rotated around the central axis of the guide shaft. Therefore, for example, the gripping device can be changed to an arbitrary rotation position according to the gripping position of the object to be cut and gripped.

Further, in the cutting device according to the present invention, the gripping device includes a support arm portion extending in a direction parallel to the guide shaft, a claw portion is provided at the tip of the support arm portion, and the claw portion is the said. With the support arm portion in contact with the object to be cut from above, the tip of the support arm portion can rotate in a direction horizontal and orthogonal to the extending direction of the guide shaft as a rotation axis. It may be characterized by being provided.

In this case, the support arm portion of the gripping device is arranged so as to extend in the cutting progress direction, and the claw portion provided at the tip of the support arm portion is rotated to a predetermined position to grip the object to be cut. Can be done. Then, in this case, the claw portion can be arranged so that the protruding direction (length direction) is substantially linear with the extending direction of the support arm portion. It can be gripped by placing the claw portion in a state of being in a straight line with the support arm portion, rotating the claw portion so as to fold it after installation, and locking the claw portion to the object to be cut. Since the claw portion does not rotate orthogonally to the projecting direction, the area for cutting the object to be cut can be kept small when the gripping device is locked to the object to be cut.
As described above, in the present invention, when the gripping device is installed on the object to be cut such as the girder by the base machine, the support arm portion is provided so that the claw portion at the tip of the gripping device does not interfere with the girder as in the conventional case. There is an advantage that time-consuming work such as laterally rotating and retracting so as to be on the same surface level as the lower surface is not required.

According to the cutting device of the present invention, the labor and time required for the work can be reduced, and the work efficiency can be improved.

It is a side view of the cutting apparatus mounted on the base machine according to the embodiment of this invention. It is a side view which shows the structure of the cutting apparatus shown in FIG. 1, and is the side view which shows the state at the time of starting the cutting work. It is a front view which looked at the cutting apparatus shown in FIG. 2 from the front. FIG. 3 is a plan view of the cutting device shown in FIG. 2 as viewed from above. It is a side view which shows the structure of the cutting apparatus shown in FIG. 1, and is the side view which shows the state in the cutting operation. It is a side view which shows the state which the base frame was rotated 180 °, and is the figure which was seen from the side opposite to FIG. It is a figure which shows the state which cut the beam material into an inverted C shape.

Hereinafter, the cutting apparatus according to the embodiment of the present invention will be described with reference to the drawings.

The cutting device 1 according to the present embodiment shown in FIG. 1 is attached to the tip end portion 11a of the swing arm 11 of the base machine 10 when dismantling a reinforced concrete structure or a steel-framed reinforced concrete structure, and the swing arm 11 is operated. By being arranged at the cutting work position, the cutting work is performed on the concrete structural member (beam member 8 in the illustrated example) as the object to be cut.
As an example of the beam member 8 of the present embodiment, a member having a T-shaped cross section due to a horizontal plate 81 and a vertical plate 82 hanging downward from the central lower surface in the width direction of the horizontal plate 81 is taken as an example.

The base machine 10 is not particularly limited, and various heavy machines can be adopted as long as it is equipped with the swing arm 11, but a general-purpose hydraulic excavator as shown in FIG. 1 is particularly preferably adopted. It is possible.

As shown in FIGS. 2 and 3, the cutting device 1 has a configuration in which the wire saw mechanism 4 is supported so as to be able to advance and retreat with respect to the guide shaft 3 attached to the tip end portion 11a of the swing arm 11 via the rotation mechanism 7. It has become. The wire saw mechanism 4 is a mechanism for cutting the beam member 8 by a push-off operation by pressing the endless loop-shaped wire saw 2 against the beam member 8 while circulatingly driving the wire saw 2. The wire saw mechanism 4 is attached to the tip end portion 11a of the swing arm 11 of the base machine 10 shown in FIG. 1, and the wire saw mechanism 4 is arranged at the cutting work position by the operation of the swing arm 11 to perform the cutting work.
The cutting device 1 includes a wire saw mechanism 4 and a gripping device 5.

In the wire saw mechanism 4, an endless loop-shaped wire saw 2 is wound around a drive pulley 21 supported by a base frame 6 described later and a plurality of guide pulleys 22. The plurality of guide pulleys 22 apply tension to the wire saw 2, the plurality of fixed pulleys 23 (here, 6) that wind the wire saw 2 so as to fold back, the propulsion pulley 24 that can move forward and backward, and the wire saw 2. It has a tension pulley 25 and a wire. The propulsion pulley 24 is arranged at each front end portion of the upper and lower end portions of the base frame 6. The tension pulley 25 is arranged on the rear end side of the propulsion pulley 24 at each of the upper and lower ends of the base frame 6 (upper base 62 and lower base 63, which will be described later), and can move forward and backward in the same manner as the propulsion pulley 24. It is provided.
In the cutting device 1, the drive pulley 21 is rotationally driven to circulate and drive the wire saw 2 while pressing the wire saw 2 against the beam member 8 from the side, thereby cutting the beam member 8 by a “push-off operation”.

The wire saw mechanism 4 is provided on the base frame 6 that supports the entire drive pulley 21 and the series of guide pulleys 22 and the tip end portion 11a of the swing arm 11 shown in FIG. 1, and guides the base frame 6 so as to be able to advance and retreat. A guide shaft 3 for supporting the guide shaft 3 and a rotation mechanism 7 for rotating the guide shaft 3 together with the base frame 6 around the central axis O of the guide shaft 3 are provided.

The base frame 6 includes a base body 61 located at the center in the vertical direction, an upper base 62 and a lower base 63 protruding forward from the upper and lower ends of the base body 61, and has an opening recess 6a opened forward. It is formed in a U shape. The base body 61 is supported so as to be movable back and forth with respect to the guide shaft 3. The base body 61 is provided with an advancing / retreating drive mechanism 64 (see FIGS. 3 and 4) for advancing / retreating the entire base frame 6 in the front-rear direction with respect to the guide shaft 3.

The advancing / retreating drive mechanism 64 is not particularly limited and is arbitrary, but for example, a feed screw mechanism or a rack and pinion mechanism using various electric or hydraulic motors or actuators as a drive source, a hydraulic or pneumatic cylinder mechanism, or the like can be preferably adopted. Is.

A drive pulley 21 and a fixed pulley 23 are arranged on the base body 61. A propulsion pulley 24 and a tension pulley 25 are arranged on the upper base 62 and the lower base 63, respectively. The vertical distance between the upper base 62 and the lower base 63 is set so that the object to be cut (beam member 8 in this embodiment) can be arranged inside both of them. A wire saw 2 wound between the upper and lower propulsion pulleys 24 and 24 is arranged so as to connect between the upper base 62 and the lower base 63 inside the opening recess 6a of the base frame 6.

The pair of propulsion pulleys 24 are configured to be able to advance and retreat in the front-rear direction by an advance / retreat drive mechanism (not shown) with respect to the upper base 62 and the lower base 63, respectively. By moving the propulsion pulley 24 forward, the wire saw 2 can be pressed forward, and cutting can be performed more efficiently. As the advance / retreat drive mechanism for driving the propulsion pulley 24 forward / backward, for example, a feed screw mechanism or a rack and pinion mechanism using various electric or hydraulic motors or actuators as a drive source, a hydraulic or pneumatic cylinder mechanism, or the like is preferably adopted. It is possible.
By providing such a propulsion pulley 24, after the cutting device 1 is arranged at the cutting work position by operating the swing arm 11, the swing arm 11 is simply fixed without being operated. It is possible to start cutting with the wire saw 2 at an appropriate inclination angle with respect to the beam member 8.

The tension pulley 25 is adjustable so as to always maintain the tension appropriately by moving back and forth with respect to the base frame 6 when the tension of the wire saw 2 changes.
When the propulsion pulley 24 is moved forward and backward as described above, the tension of the wire saw 2 temporarily changes, and in particular, when the wire saw 2 becomes excessively loose, it falls off from the drive pulley 21 and the fixed pulley 23. It can be prevented from doing so.

In order to adjust the tension of the wire saw 2 by the tension pulley 25, the tension pulley 25 is appropriately moved back and forth by a drive mechanism such as a hydraulic cylinder while detecting the tension of the wire saw 2, or the tension pulley 25 is used. It is preferable that the wire saw 2 is always urged by a spring in a direction in which the wire saw 2 is tensioned so that the change in tension is naturally absorbed by the elasticity of the spring.

The guide shaft 3 extends along the length direction (front-back direction). The guide shaft 3 includes a rack 3c, which is a drive shaft for moving the advance / retreat drive mechanism 64, and a pair of guide rails 3d arranged in parallel on both sides of the rack 3c. The rack 3c is arranged coaxially with the central axis O of the rotating mechanism 7, and the entire guide shaft 3 is rotatably provided around the central axis O by the rotational power of the rotating mechanism 7. A pinion (not shown) provided in the advancing / retreating drive mechanism 64 meshes with the rack 3c.
The rear end 3b of the guide shaft 3 is fixed coaxially with the rotation shaft 72 of the rotation mechanism 7 to be described later, and the front end 3a is provided with a gripping device 5 rotatably around the central axis O. The length dimension of the guide shaft 3 is set to a length that allows the base frame 6 that moves back and forth along the guide shaft to move back and forth between the retracted position S1 (see FIG. 2) and the extrusion completion position S2 (see FIG. 5). Has been done.

As shown in FIGS. 1 and 2, the rotation mechanism 7 includes a base portion 71 fixed to the tip end portion 11a of the swing arm 11 of the base machine 10 and a rotary disk rotatably provided with respect to the base portion 71. It has a drive motor 73 that is fixed to the base portion 71 and rotates the turntable 72.

The base portion 71 is provided with a mounting bracket 74. The mounting bracket 74 is formed with locking holes 74a and 74b that are locked to the respective tip portions 11a of the arm body 11A and the cylinder 11B of the swing arm 11. By expanding and contracting the cylinder 11B of the arm body 11A and the cylinder 11B locked in the pair of locking holes 74a and 74b, the mounting bracket 74 (that is, the rotating mechanism 7) moves up and down with respect to the swing arm 11. It is rotated.

Further, as shown in FIG. 4, a pair of horizontal rotation cylinders 75 are provided between the base portion 71 and the mounting bracket 74 in the horizontal direction with the central axis O of the guide shaft 3 interposed therebetween. A locking tool 76 is fixed to the rear surface of the base portion 71 on the mounting bracket 74 side in the center in the left-right direction. In each of the horizontal rotation cylinders 75, the rear end on the swing arm 11 side is connected to the mounting bracket 74, and the front end is connected to the locking tool 76. By appropriately expanding and contracting each of the pair of horizontal rotation cylinders 75, the base portion 71 is configured to be swingable to the left and right around the locking tool 76 in a top view.

On the rear surface 71a of the base portion 71, a drive motor 73 which is formed in a disk shape and rotates a rotary disk 72 provided on the front surface 71b around the central axis O by, for example, 180 ° to the left and right is fixed. Here, the central axis O is an axis that passes through the center of the turntable 72 and extends in a direction orthogonal to the board surface of the turntable 72. The rear end 3b of the guide shaft 3 is integrally fixed to the front surface 72a of the turntable 72. The axial direction of the guide shaft 3 is parallel to the central axis O.

As shown in FIG. 4, the gripping device 5 is rotatably provided around the central axis O with respect to the front end 3a of the guide shaft 3. As shown in FIG. 2, the gripping device 5 includes a support arm portion 51 that extends in a direction parallel to the guide shaft 3 (front-rear direction) and can slide in the front-rear direction, and a holding frame provided on the rear end side of the support arm portion 51. 52 and a claw portion 53 provided on the front end side of the support arm portion 51 are provided. The holding frame 52 is attached to a rotating shaft body 50 provided at the front end 3a of the guide shaft 3.

The holding frame 52 extends in a direction orthogonal to the central axis O with respect to the guide shaft 3, and a telescopic jack 54 that expands and contracts in the extending direction of the holding frame 52 is incorporated at the tip thereof. The rear end portion 51a of the support arm portion 51 is fixed to the front end portion 54a of the telescopic jack 54. A concave-convex first grip portion 52a is formed on the front surface of the holding frame 52.

The support arm portion 51 has a guide portion 51A, a slide piece 51B that is guided by the guide portion 51A and can project forward, and a slide jack 51C for sliding the slide piece 51B in the front-rear direction. There is. The claw portion 53 described above is provided on the front end portion 51b of the slide piece 51B in the support arm portion 51 so as to be rotatable up and down. A contact plate 55 is fixed to the lower surface of the guide portion 51A.

The claw portion 53 rotates in a direction horizontal and orthogonal to the extending direction of the guide shaft 3 at the tip of the support arm portion 51 in a state where the support arm portion 51 is in contact with the beam member 8 from above. It is provided so as to be rotatable. A second grip portion 53a having an uneven shape is formed on the rear surface of the claw portion 53.
The gripping device 5 holds the abutting plate 55 against the upper surface 8a of the beam member 8 from above when the claw portion 53 is closed while moving the slide piece 51B of the support arm portion 51 rearward. It is possible to sandwich the beam member 8 with the frame 52. On the other hand, by rotating the claw portion 53 in the opening direction, the sandwiched beam member 8 can be released.

Next, a construction method for cutting the beam member 8 using the cutting device 1 described above will be described in detail with reference to the drawings. Here, the beam member 8 is intended to be a slab provided on the upper portion of the beam member 8 which has been almost disassembled and removed.

First, the cutting device 1 is set at the cutting position of the beam member 8. At this time, as shown in FIG. 1, the telescopic jack 54 of the holding frame 52 is in an extended state with the support arm portion 51 of the gripping device 5 facing up. Then, after arranging the support arm portion 51 above the beam member 8, as shown in FIG. 2, the telescopic jack 54 is contracted to bring the contact plate 55 into contact with the upper surface 8a of the beam member 8, and further, the support arm portion The slide piece 51B of 51 is pulled backward. After that, by closing the claw portion 53, the beam member 8 is gripped between the first grip portion 52a of the holding frame 52 and the second grip portion 53a of the claw portion 53 and firmly fixed. As a result, the cutting device 1 is positioned at a predetermined position of the beam member 8, and it is possible to prevent the entire cutting device 1 from swinging or being inadvertently misaligned during the cutting operation.

At this time, at the start of the cutting operation, as shown in FIG. 2, the base frame 6 is arranged at the rearmost position (on the swing arm 11 side) of the guide shaft 3, and the upper base 62 is further arranged in the rotation direction of the base frame 6. It is arranged in a position directly above, that is, in a rotational posture in which the direction in which the upper base 62 and the lower base 63 face each other faces in the vertical direction. That is, the base frame 6 is in a posture in which the cut portion of the wire saw 2 located in the opening recess 6a extends in the vertical direction when viewed from the front (front).
Specifically, in the cutting device 1, the gripping device 5 is located on the right side of the base frame 6 when viewed from the rear.

Next, as shown in FIG. 5, the drive pulley 21 is rotated to circulate the wire saw 2, and then the advance / retreat drive mechanism 64 (see FIG. 3) is driven to guide the base frame 6 to the guide shaft 3. To move forward. As a result, the wire saw 2 can be pushed forward with respect to the beam material 8 by advancing with respect to the beam material 8.
Then, in the present embodiment, the propulsion pulley 24 provided on the upper base 62 of the wire saw mechanism 4 is arranged in the front, and the propulsion pulley 24 provided in the lower base 63 is arranged in the rear, and the wire saw 2 is viewed from the side. The beam member 8 is cut while moving the propulsion pulley 24 of the lower base 63 forward while driving the wire saw 2 at the final stage, and the propulsion pulley 24 of the lower base 63 is the most. By moving it to the front, the wire saw 2 is pushed through, the wire saw 2 becomes the position of the two-point chain line in FIG. 5, and the beam member 8 is completely cut.

In the present embodiment, an example of using the above-mentioned cutting device 1 for cutting the beam material 8 is shown. However, for example, when the beam material 8 is cut after cutting the pillar material (not shown), the rotation mechanism 7 is used. Rotate the base frame 6 in the horizontal posture (the position where the upper base 62 and the lower base 63 face each other in the horizontal direction) by 90 ° and rotate the base frame 6 in the vertical posture (the direction in which the upper base 62 and the lower base 63 face each other in the vertical direction). The direction of the wire saw 2 at the cut portion can be changed by 90 ° by setting the position (facing position).

Next, in the case of the above embodiment, as shown in FIGS. 1 and 2, the gripping device 5 is arranged on the right side of the base frame 6 provided with the wire saw 2 when viewed from the rear on the base machine 10 side to form a beam. The material 8 is cut (base frame 6 in the first posture of reference numeral P1 shown in FIGS. 2 and 3). On the other hand, if there is a pillar material (not shown) on the right side of the base frame 6 and the portion closer to the pillar material becomes a cutting portion, the gripping device 5 interferes with the pillar material. In this case, in the cutting device 1 of the present embodiment, the positions of the gripping device 5 and the base frame 6 are reversed left and right, and the posture is changed so that the gripping device 5 is arranged on the left side of the base frame 6 (FIG. 3). And the base frame 6) of the second posture of the reference numeral P2 shown in FIG.

As shown in FIG. 3, in the base frame 6 of the second posture P2, the posture is reversed by 180 ° around the central axis O of the guide shaft 3 with respect to the first posture P1, and the upper base 62 is on the lower side. The lower base 63 is located on the upper side. At this time, the wire saw 2 remains positioned in front of the opening recess 6a of the base frame 6, and cuts the beam member 8 by guiding the base frame 6 to the guide shaft 3 as in the case of the first posture P1. be able to.

Next, the operation of the cutting device 1 described above will be described in detail with reference to the drawings.
In the cutting device 1 according to the present embodiment, as shown in FIG. 1, the base frame 6 of the wire saw mechanism 4 is mounted on the swing arm 11 of the base machine 10 so as to be able to advance and retreat via the guide shaft 3. The wire saw 2 is circulated and driven in a state where the wire saw mechanism 4 is arranged at the cutting work position by operating the swing arm 11, and the base frame 6 is guided to the guide shaft 3 by the advance / retreat drive mechanism to advance the wire. The beam member 8 which is the object to be cut can be cut by the push-cut operation by the saw 2.

Then, in the present embodiment, as shown in FIGS. 2 and 5, the guide shaft 3 and the base frame 6 are rotated by the rotation mechanism 7 with respect to the tip end portion 11a of the swing arm 11 of the base machine 10 shown in FIG. Since it is provided so that it can be provided, the posture of the base frame 6 can be changed to a position at a predetermined angle in the rotation direction without changing the direction of the swing arm 11. That is, the direction and angle of the wire saw 2 supported by the base frame 6 with respect to the object to be cut such as the beam member 8 can be changed.

Further, even when the member mounted on the cutting device 1 and the beam member 8 interfere with each other at the time of cutting, for example, as shown in FIG. 3, the base frame 6 is rotated by 180 ° around the central axis O of the guide shaft 3 to interfere with each other. It is possible to eliminate the problem and disconnect. Therefore, even in the construction in a narrow space, the positioning work of the cutting device 1 with respect to the object to be cut can be efficiently performed.

As described above, in the present embodiment, when shifting from the cutting work of the beam material 8 extending in the horizontal direction to the cutting work of the pillar material extending in the vertical direction, the setup change work for changing the posture and orientation of the wire saw 2 and the base frame 6 is performed. It becomes unnecessary, the work time and labor can be reduced, and the work efficiency can be improved. For example, as shown in FIG. 7, when cutting the beam member 8 with the inverted C-shaped cutting portion 8A, the wire saw 2 (base frame 6) is rotated according to the inclination angle of the cutting portion 8A. Can be easily cut.
For example, in the conventional cutting device 1, when the rotation angle of the base frame 6 is changed, a work of once separating from the tip end portion 11a of the swing arm 11 of the base machine 10 and mounting the base frame 6 at a different angle occurs. Therefore, for example, the work was performed by two workers for 5 minutes or more, but in the present embodiment, the work is performed by one person for several tens of seconds.

Further, in the present embodiment, as shown in FIG. 1, a rotation mechanism 7 is provided in the vicinity of the tip end portion 11a of the swing arm 11 via a mounting bracket 74, and a rotation mechanism 7 for rotating the guide shaft 3 is provided. Since it is located on the swing arm 11, the guide shaft 3 can be efficiently rotated with the mounting bracket 74 mounted on the swing arm 11.

Further, in the cutting device 1 according to the present embodiment, the base frame 6 can be positioned and fixed at a predetermined rotational position by gripping the gripping device 5 on the beam member 8. Therefore, unlike a conventional cutting device that does not have a gripping device, it is not necessary to fix the entire cutting device to the object to be cut by an anchor or the like each time, and the swing arm of the base machine is operated accurately and strictly. Since it is not necessary to perform cutting by doing so, easy and efficient cutting work becomes possible.

Further, in the present embodiment, when the beam member 8 is a girder and a column, the gripping device 5 grips the girder side on which one end has already been cut, and when the girder end on the column edge side is cut, the beam is cut. It is possible to prevent the girders cut at both ends from shaking at the moment.
Further, in the present embodiment, the gripping device 5 and the base frame 6 are separately rotated around the central axis O of the guide shaft 3. Therefore, for example, the gripping device can be changed to an arbitrary rotation position according to the gripping position of the object to be cut and gripped.

Further, in the cutting device 1 according to the present embodiment, the support arm portion 51 of the gripping device 5 is arranged in a state of extending in the cutting traveling direction, and the claw portion 53 provided at the tip of the support arm portion 51 is rotated to a predetermined position. The beam member 8 can be gripped by allowing the beam member 8 to be gripped. Then, in this case, the protruding direction (length direction) of the claw portion 53 can be arranged so as to be substantially linear with the extending direction of the support arm portion 51 (the claw shown by the alternate long and short dash line in FIG. 2). See part 53). The claw portion 53 can be gripped by placing the claw portion 53 in a state of being in a straight line with the support arm portion 51 and rotating the claw portion 53 so as to fold and locking the claw portion 53 to the beam member 8 after installation. Since the claw portion 53 does not rotate orthogonally to the projecting direction, the region where the beam member 8 is cut can be kept small when the gripping device 5 is locked to the beam member 8.
As described above, in the present embodiment, when the gripping device 5 is installed on the beam member 8 such as a girder by the base machine 10, the claw portion 53 at the tip of the gripping device 5 does not interfere with the beam member 8 as in the conventional case. As described above, there is an advantage that time-consuming work such as laterally rotating and retracting so as to be on the same surface level as the lower surface of the support arm portion 51 becomes unnecessary.

As described above, in the cutting device 1 according to the present embodiment, the labor and time required for the work can be reduced, and the work efficiency can be improved.

Although the embodiment of the cutting device according to the present invention has been described above, the present invention is not limited to the above embodiment and can be appropriately modified without departing from the spirit of the present invention.

For example, in the present embodiment, the rotation mechanism 7 is mounted on the tip end portion 11a of the swing arm 11 of the base machine 10 via the mounting bracket 74, but the configuration of the rotation mechanism 7 is limited to this. There is no. For example, the rotation mechanism 7 is arranged between the swing arm 11 and the attachment / detachable mounting bracket 74 at the tip end portion 11a, but the present invention is not limited to such a configuration, and other configurations are available. May be good.

Further, in the present embodiment, the gripping device 5 capable of gripping the beam member 8 is rotatably provided around the central axis O of the guide shaft 3 at the front end 3a of the guide shaft 3, but the gripping device 5 The configuration is not limited to this. For example, the configuration is not limited to a configuration that can rotate with respect to the guide shaft 3. Therefore, the gripping device may have another configuration that does not include the support arm portion 51 or the claw portion 53 as in the present embodiment. Further, in the present invention, the gripping device itself can be omitted.

Further, the mounting position, quantity, and the like of each pulley (drive pulley 21, guide pulley 22) provided on the base frame 6 can be arbitrarily set, and the shape and the like of the base frame 6 can be arbitrarily set.

Furthermore, in the present embodiment, the beam material 8 is targeted as the object to be cut, but the beam material and the column material are not limited, and the reinforced concrete structure, the steel reinforced concrete structure, or the steel frame that can be cut by the wire saw 2 is used. Structures can be targeted.

Further, in the present embodiment, the telescopic jack 54 that expands and contracts in the extending direction of the holding frame 52 is incorporated in the tip of the holding frame 52, but the telescopic jack 54 is not limited to the telescopic jack 54 and can be manually expanded and contracted. Good.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention.

1 Cutting device 2 Wire saw 3 Guide shaft 4 Wire saw mechanism 5 Gripping device 6 Base frame 7 Rotating mechanism 8 Beam material (object to be cut)
10 Base machine 11 Swing arm 11a Tip part 21 Drive pulley 22 Guide pulley 51 Support arm part 53 Claw part 74 Mounting bracket (bracket)
O Central axis of guide shaft

Claims (4)

It has a wire saw mechanism that cuts the object to be cut by pushing the object to be cut by pressing the endless loop-shaped wire saw against the object to be cut while circulating driving, and the wire saw mechanism is the tip of the swing arm of the base machine. A cutting device having a configuration in which the wire saw mechanism is placed at a cutting work position and cutting work is performed by mounting the wire saw mechanism on a portion and operating the swing arm.
The wire saw mechanism
With a base frame that supports the entire drive pulley and series of guide pulleys,
A guide shaft provided at the tip of the swing arm and guiding the base frame so as to be able to move forward and backward,
A rotation mechanism that rotates the guide shaft together with the base frame around the central axis of the guide shaft with respect to the tip end portion of the swing arm.
A cutting device characterized by being equipped with. The cutting device according to claim 1, wherein the rotating mechanism is arranged between the tip of the swing arm of the base machine and a detachable bracket. The claim is characterized in that a gripping device capable of gripping the object to be cut is rotatably provided around the central axis of the guide shaft at the tip of the guide shaft on the side opposite to the base machine side. The cutting device according to 1 or 2. The gripping device includes a support arm portion extending in a direction parallel to the guide shaft.
A claw portion is provided at the tip of the support arm portion.
The claw portion rotates in a direction horizontal and orthogonal to the extending direction of the guide shaft at the tip of the support arm portion in a state where the support arm portion is in contact with the object to be cut from above. The cutting device according to claim 3, wherein the cutting device is rotatably provided as a shaft.

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