JP2019111768A - Structural member cutting device, and structural member cutting method - Google Patents

Abstract

To provide a cutting device having high working efficiency.SOLUTION: Provided is a cutting device 1 provided with a wire saw mechanism 8 cutting an underground beam C. The wire saw mechanism 8 includes: a plurality of pulleys; and wire saws 5 rounded around the plurality pulleys in an endless loop shape and circularly rotating. Each pulley includes: a driving pulley circularly rolling the wire saw 5; and a deflection regulation pulley regulating the deflection of the wire saw 5. The cutting device 1 includes: a driving part 14 of driving the driving pulleys and the regulation pulleys; and a movement mechanism 76 provided at the driving part 14 and moving the wire saw mechanism 8 along a T4 direction.SELECTED DRAWING: Figure 6

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a cutting device suitably used for cutting large-sized structural members such as underground beams and a method of cutting a structural member using the cutting device.

  Conventionally, when dismantling large concrete members (structural members) erected along the vertical direction, such as underground beams, or large concrete members extending in the horizontal direction, using a general rock drilling machine Use a large crusher such as a giant breaker.

  However, dismantling a large concrete member using a large crusher such as a giant breaker generates extremely loud noise, vibration, and a large amount of dust. In particular, when the underground beam is disassembled, the cutting operation is performed underground, so a large vibration occurs and the influence of the work site on the neighborhood becomes large.

  Therefore, the applicant of the present application has proposed a cutting device capable of cutting a large structural member by using a wire saw in a push-through method or a pull-off method, and a method of cutting a structural member using the cutting device. (See, for example, Patent Document 1).

JP, 2014-69529, A

  For example, as shown in FIG. 9, in the case of using the cutting device 100 provided with the wire saw mechanism 108 of the pull-off method, the wire saw 105 is circulated and rotated via the lower guide pulleys 128A and 128B, Can be cut horizontally. In the lower part of FIG. 9, the configuration of the cutting device 100 other than the lower guide pulleys 128A and 128B and the wire saw 105 passing between the pulleys is omitted to make the description easy to understand. Also, after the underground beam C is cut in the horizontal direction, the underground beam C can be cut in the vertical direction by rotating the wire saw 105 while rotating the lower guide pulleys 128A and 128B upward. .

  However, as shown in the lower part of FIG. 9, when the underground beam C is cut in the lateral direction, the trajectory of the wire saw 105 passing through the underground beam C is arcuate in plan view. As a result, the cutting position p11 at the central portion in the width direction of the underground beam C is on the near side of the cutting direction by the distance Q from the cutting position p12 at both ends. For this reason, when changing the cutting direction of the underground beam C from the horizontal direction to the vertical direction, the position of the cutting apparatus 100 is returned to the near side of the cutting direction in order to reshape the trajectory of the wire saw 105 from an arched shape to a straight shape. I needed it. That is, there has been a problem that it is necessary to operate a construction work machine (not shown) supporting the cutting device 100 or the like to replace the cutting device 100.

  As one of the solutions to the above-mentioned problems, there is a method of communicating the cutting positions p11 and p12 and forming a core having a diameter substantially equal to the distance Q (so-called core removal). If coring is performed, it is possible to start cutting the underground beam longitudinally while the wire saw 105 is at the cutting position p12 without replacing the cutting device 100.

  However, as described above, whenever the cutting direction of the structural member is switched from the horizontal direction to the vertical direction, if installation and core removal of the cutting device are performed, it takes time and labor and the working efficiency is lowered. The present invention has been made in view of the above-described circumstances, and provides a cutting device and a cutting method of a structural member capable of enhancing the efficiency of the cutting operation of the structural member.

  The cutting device for a structural member according to the present invention is a cutting device for a structural member provided with a wire saw mechanism for cutting a structural member, wherein the wire saw mechanism comprises a plurality of pulleys and an endless loop of the plurality of pulleys. And a plurality of pulleys including a drive pulley for rotating and rotating the wire saw, and a deflection adjusting pulley for adjusting deflection of the wire saw. A drive pulley and a drive unit for driving the deflection adjustment pulley, and a moving mechanism provided in the drive unit for moving the wire saw device along the cutting direction.

  According to the cutting device for a structural member of the present invention, the deflection of the wire saw can be adjusted with the position of the drive section fixed by operating the deflection adjusting pulley and the moving mechanism. Thus, once the core is formed to allow the wire saw to pass through and once the cutting device is installed above the structural member, the structural member can be transversely and longitudinally without repositioning of the cutting device or additional coring operations. It can cut in the direction. By this, the efficiency of the cutting operation of the underground beam C can be enhanced compared to the cutting operation of repositioning the cutting device and performing additional coring as in the prior art.

  In the structural member cutting device of the present invention, the plurality of pulleys further include lower guide pulleys on both sides of the structural member along the width direction of the structural member, and the deflection adjusting pulleys are along the wire saw. The deflection of the wire saw wound between the lower guide pulleys may be adjusted by approaching and separating the plurality of adjacent pulleys.

  According to the cutting device for a structural member of the present invention, the deflection adjusting pulley is brought close to and separated from a plurality of adjacent pulleys along the wire saw so that the deflection adjusting pulley and the deflection adjusting pulley and the adjacent pulley are adjacent to each other. By increasing or decreasing the length of the wound wire saw, the deflection of the wire saw wound between the lower guide pulleys can be adjusted simply and efficiently.

  In the structural member cutting device of the present invention, the plurality of pulleys further include lower guide pulleys on both sides of the structural member along the width direction of the structural member, and are connected to the drive unit. The apparatus may further include a guide member movably supported along the longitudinal direction, and the lower guide pulley may be pivotable about the guide member.

  According to the cutting device for a structural member of the present invention, since the lower guide pulley pivots around the guide member, the guiding direction of the wire saw can be smoothly changed according to the cutting direction of the structural member.

  The method for cutting a structural member according to the present invention is a method for cutting a structural member using the above-described structural member cutting apparatus, and the above-mentioned wire saw inserted in the width direction of the structural member is circulated and rotated. Moving the wire saw mechanism to the far side of the cutting direction of the structural member and cutting the structural member in the lateral direction; and in the cutting direction while reducing the deflection of the wire saw by the deflection adjusting pulley. A take-back step of moving the wire saw mechanism to the nearest position of the wire saw; and a portion through which the wire saw is inserted in the width direction of the structural member while circulating and rotating the wire saw. And C. a longitudinal cutting step of vertically lifting the structural member by means of a wire saw mechanism.

  According to the method of cutting a structural member of the present invention, the transverse cutting step and the takeback step are performed using the above-described cutting device for a structural member, so a core to which a wire saw is inserted first is formed, Once the cutting device has been installed, the structural members can be cut in the lateral and longitudinal directions without repositioning of the cutting device or additional coring operations. By this, the efficiency of the cutting operation of the underground beam C can be enhanced compared to the cutting operation of repositioning the cutting device and performing additional coring as in the prior art.

  ADVANTAGE OF THE INVENTION According to the cutting device of the structural member of this invention, and the cutting method of a structural member, the efficiency of the cutting operation of a structural member can be improved.

It is a front view showing a cutting device of a structural member concerning one embodiment of the present invention. It is a side view which shows the cutting device of the structural member shown in FIG. It is a figure for demonstrating the cutting method of a structural member using the cutting device of the structural member shown in FIG. 1, Comprising: The upper stage is a side view, and the lower stage is a top view. It is a figure for demonstrating the cutting method of a structural member using the cutting device of the structural member shown in FIG. 1, Comprising: The upper stage is a side view, and the lower stage is a top view. It is a figure for demonstrating the cutting method of a structural member using the cutting device of the structural member shown in FIG. 1, Comprising: The upper stage is a side view, and the lower stage is a top view. It is a figure for demonstrating the cutting method of a structural member using the cutting device of the structural member shown in FIG. 1, Comprising: The upper stage is a side view, and the lower stage is a top view. It is sectional drawing for demonstrating the cutting method of a structural member using the cutting device of the structural member shown in FIG. It is a figure for demonstrating the cutting method of a structural member using the cutting device of the structural member shown in FIG. 1, Comprising: The upper stage is a side view, and the lower stage is a top view. It is a figure for demonstrating the cutting method of the structural member using the cutting device of the conventional structural member, Comprising: The upper stage is a side view, and the lower stage is a top view.

  Hereinafter, embodiments of a cutting device of a structural member and a cutting method of a structural member to which the present invention is applied will be described with reference to the drawings. The drawings used in the following description are schematic, and the ratios of length, width, and thickness, etc. are not necessarily the same as actual ones, and may be changed as appropriate.

  In this embodiment, a cutting device suitable for cutting a large-sized and concrete structural member which is vertically installed and extends in the lateral direction, such as a underground beam (structural member), will be described.

[Cutting device for structural members]
As shown in FIG. 1 and FIG. 2, the cutting device (cutting device for a structural member) 1 is a wire saw cutting device provided with a wire saw 5 and can cut a structural member such as the underground beam C by a cutting method. Is configured as. The cutting device 1 is attached to a base machine of a construction work machine such as a lifting machine such as a crane (not shown) or a hydraulic shovel.

  The cutting apparatus 1 includes an adapter 80 (see FIG. 2, see FIG. 1) attached to the above-mentioned base machine, a guide frame 10 provided at the lower part of the adapter 80, and a T1 direction from the lower part of the side end of the guide frame 10. Support members 41 and 41 extended outward along the width direction of the underground beam C, and the tips of the support members 41 and 41 are connected via the connection portion 42 to the T2 direction (that is, , And a wire saw mechanism 8 attached to the guide frame 10 for cutting the underground beam C. As shown in FIG.

  The pair of guide members 44, 44 are connected to the guide member adjustment mechanism by an electric cable (not shown) or the like, and can move in the direction T2 in a state of being inserted into the cylindrical connection portion 42.

  The wire saw mechanism 8 includes a plurality of pulleys, and a wire saw 5 wound around the plurality of pulleys in the form of an endless loop and circulatingly rotating. As shown in FIG. 1, the plurality of pulleys are a drive pulley 26 disposed inside the guide frame 10, an inner guide pulley 31, 33, 35, 38 and a deflection adjustment pulley 32, 34, and a pair of guide members Outer upper guide pulleys 27A, 27B connected to the upper ends of 44, 44 and outer lower guide pulleys (lower guide pulleys) 28A, 28B connected to the lower ends of the pair of guide members 44, 44.

  The drive pulley 26 is connected to a drive (not shown) via an axis 56 extending along the direction T3 (ie, the cutting direction), and is rotationally driven about the axis 56. An axial core 56 passes through a through hole 15 formed in the back surface 11 of the guide frame 10 and extending in the T2 direction. The drive pulley 26 is connected to the drive via the shaft 56 and is movable along the direction T2 by the drive.

  The deflection adjustment pulleys 32, 34 are connected to a drive (not shown) via shaft cores 62, 64 extending along the T3 direction (ie, cutting direction), and are rotationally driven around the shaft cores 62, 64. The shaft cores 62, 64 pass through the through holes 16, 17 formed in the back surface 11 of the guide frame 10 and extending in the T2 direction. The deflection adjusting pulleys 32, 34 are connected to the drive via the shaft cores 62, 64, and are independently movable along the direction T2 by the drive.

  The inner guide pulleys 31, 33, 35, 38 are disposed at predetermined intervals in the T1 direction at least below the drive pulley 26 and the deflection adjustment pulleys 32, 34 inside the guide frame 10.

  The wire saw 5 rotates clockwise from the drive pulley 26 to the inner guide pulley 38, the outer upper guide pulley 27B, the outer lower guide pulleys 28B and 28A, the outer upper guide pulley 27A, the inner guide pulley 35, clockwise from the front view of FIG. The deflection adjustment pulley 34, the inner guide pulley 33, the deflection adjustment pulley 32, the inner guide pulley 31, and the drive pulley 26 are wound around in an endless loop. When cutting the underground beam C, the wire saw 5 wound between the outer lower guide pulleys 28B and 28A penetrates the underground beam C. The wire saw 5 is circulated and rotated as the drive pulley 26 is rotationally driven.

  As the deflection adjusting pulleys 32, 34 and, if necessary, the drive pulley 26 move upward in the T2 direction, the length of the wire saw 5 present inside the guide frame 10, ie, the deflection adjusting pulleys 32, 34 and the inner guide The length of the wire saw 5 wound between the pulleys (plural pulleys adjacent to each other along the wire saw) 31, 33, 35 increases. Except for the slight expansion and contraction due to the elasticity of the material of the wire saw 5, the total length of the endless loop wire saw 5 is constant. As described above, if the length of the wire saw 5 present inside the guide frame 10 increases, the length of the wire saw 5 present outside the guide frame 10 decreases. As a result, the deflection of the wire saw 5 caused when the guide members 44, 44 move up and down or when the underground beam C in the lateral direction is cut is reduced.

  Conversely, when the deflection adjustment pulleys 32, 34 and, if necessary, the drive pulley 26 move downward in the T2 direction, the length of the wire saw 5 present inside the guide frame 10 decreases and The length of the wire saw 5 present outside increases. As shown in FIG. 1, when the guide members 44, 44 are in the raised position, the wire saw 5 present outside the guide frame 10 may be elongated.

  By moving the deflection adjusting pulleys 32, 34 along the direction T2, not only the deflection of the wire saw 5 but also the tension of the wire saw 5 can be maintained or adjusted in a predetermined manner. However, the movable distance of the deflection adjusting pulleys 32 and 34 is required to be longer when adjusting the deflection of the wire saw 5 as compared to the case where the tension of the wire saw 5 is maintained as predetermined. Therefore, the movable distance of the deflection adjustment pulleys 32, 34 is greater than the movable distance of, for example, a tension pulley for maintaining the tension of the wire saw 5 in a predetermined manner.

  The connection fitting 47 is attached to the upper ends of the pair of guide members 44, 44. The outer upper guide pulleys 27A and 27B rotate around the shaft core 67 inserted into the connection fitting 47 along the direction T3. The postures of the outer upper guide pulleys 27A and 27B are fixed to be parallel to the T1 direction. Accordingly, the outer upper guide pulleys 27A and 27B do not pivot about the guide member 44.

  The connection fitting 48 is attached to the lower ends of the pair of guide members 44, 44. The outer lower guide pulleys 28A and 28B rotate around the shaft core 68 inserted into the connection fitting 48. The connection fitting 48 is connected to the lower end of the connection portion 42 so as to be pivotable as shown by the arrow around the connection portion 42 in plan view. Therefore, the posture of the outer lower guide pulleys 28A and 28B can be changed in any direction by placing it on a plane while standing along the T2 direction.

  As shown in FIG. 2, the guide frame 10 is connected to the hydraulic cylinder 72 via a rod-like connecting portion 75 extending from the back surface 11 to the rear side in the T3 direction (that is, the rear side in the cutting direction at the time of transverse cutting). Be done. The length of the connecting portion 75 projecting from the hydraulic cylinder 72 to the front side in the T3 direction (that is, the front side in the cutting direction at the time of the horizontal cutting) is variable. The hydraulic cylinder 72 and the connecting portion 75 constitute a moving mechanism 76 for moving the wire saw mechanism 8 along the direction T3. The moving mechanism 76 allows the guide frame 10 to freely move, for example, between a predetermined position p1 and a position p2.

  The hydraulic cylinder 72 and the proximal end of the connecting portion 75 on the hydraulic cylinder 72 side are accommodated in the drive portion 14. The above-described guide member adjustment mechanism, and drive devices for the drive pulley 26 and the deflection adjustment pulleys 32 and 34 are also accommodated in the drive unit 14. The drive unit 14 is provided on the base 13. When the base 13 is in contact with the upper surface α of the underground beam C and the drive unit 14 is installed above the underground beam C, the base 13 absorbs a reaction force or the like, and the drive unit 14 is positioned above the underground beam C. Stabilize. An adapter 80 is provided on the top surface of the drive unit 14.

  Hereinafter, the surface direction including the endless loop-shaped wire saw 5 corresponds to the “longitudinal direction” (the T2 direction). Further, the surface direction orthogonal to the longitudinal direction, that is, the direction in which the connecting portion 75 advances and retracts corresponds to the “lateral direction” (the T3 direction).

[Method of cutting components]
Next, a method of cutting a structural member according to the present embodiment (hereinafter sometimes simply referred to as “cutting method”) will be described with reference to FIGS. 3 to 8. In addition, in FIGS. 3-8, only the principal part of the cutting device 1 is shown in figure.

  The cutting method of the present embodiment is a cutting method of the underground beam C using the cutting device 1, and at least a transverse direction cutting step of cutting the underground beam C in the lateral direction, the wire saw mechanism 8 in the T3 direction And a second step (longitudinal cutting step) of longitudinally cutting the underground beam C. In the cutting method of the present embodiment, the coring step of forming the pilot hole R in the underground beam C and the longitudinal cutting method of cutting the underground beam C in the longitudinal direction are performed before the horizontal direction cutting step. Perform the process. Furthermore, in the cutting method of the present embodiment, the structural member cutting step is performed after the second step in the vertical direction cutting. Each step will be described below.

<Core removal process>
A pilot hole R penetrating the underground beam C along the direction T1 is formed at the lowermost portion of the underground beam C on the most near side (left side in FIG. 3) in the direction T3 (see FIG. 3). In addition, when an installation piping hole etc. are already formed in the underground beam C, the installation piping hole can be substituted as the pilot hole R, and this process can be skipped.

<Longitudinal cutting first step>
The cutting device 1 is installed on the upper surface α of the underground beam C. The connecting portion 75 is temporarily fixed in a state of being retracted to the hydraulic cylinder 72, and the position of the wire saw 5 is aligned with the cutting position p3 of the pilot hole R in the T3 direction. Subsequently, the wire saw 5 is inserted into the pilot hole R. A pair of guide members 44 are disposed on both sides of the underground beam C in the T1 direction using the guide member adjustment mechanism, and are lowered along the T2 direction. Thereafter, the drive pulley 26 is driven to rotate, and the wire saw 5 is circulated and rotated, and the guide member 44 is raised using the guide member adjustment mechanism. At this time, the pair of guide members 44 may be raised at the same height, or the pair of guide members 44 may be raised alternately and stepwise. In this step, as shown in the upper part of FIG. 3, a cutting hole H1 communicating with the pilot hole R and extending upward from the pilot hole R in the direction T2 is formed in the underground beam C. When the wire saw 5 reaches above the underground beam C, the cutting hole H1 opens in the upper surface α of the underground beam C to be cut (see the upper stage in FIG. 4).

<Horizontal cutting process>
Next, in consideration of the size of the underground beam C to be cut out, the drive unit 14 is disposed on the back side in the direction T4 and temporarily fixed, and the connecting unit 75 is advanced from the hydraulic cylinder 72. The position is aligned with the cutting position p3 of the pilot hole R. Subsequently, the guide member 44 is lowered such that the height of the wire saw 5 between the outer lower guide pulleys 28A and 28B in the T2 direction becomes the height of the pilot hole R using the guide member adjustment mechanism. While the wire saw 5 is circulated and rotated, as shown in the upper part of FIG. 4, the wire saw 5 is moved to the back side in the T4 direction, and the underground beam C is cut to the back side in the T4 direction.

  In the lateral cutting step, the wire saw 5 circulatingly driven above the outer lower guide pulleys 28B and 28A pulls the wire saw 5 circulatingly driven while being inserted into the cutting hole H2 to the back side in the T4 direction. There is. Therefore, as shown in the lower part of FIG. 4, the posture in plan view of the outer lower guide pulleys 28B and 28A is a posture slightly pivoted from the T1 direction to the T3 direction. After this process is performed, a cutting hole H2 extending from the cutting position p3 to the cutting position p4 is formed in the underground beam C.

  As shown in the upper and lower portions of FIG. 5, after the transverse cutting process is performed to the predetermined cutting position p4, the circulation driving of the wire saw 5 is temporarily stopped. In this state, as shown in the lower part of FIG. 5, the wire saw 5 inserted into the cutting hole H2 is bowed as viewed from above. Further, the cutting position p4 at the central portion in the T1 direction (the width direction of the underground beam) is closer to the T4 direction by the distance S1 than the cutting positions p5 at the both ends. The position p6 of the outer lower guide pulleys 28B and 28A is on the back side in the T4 direction by the distance S2 from the cutting position p4, and is on the back side in the T4 direction from the cutting position p5.

<Takeback process>
Next, while reducing the deflection of the wire saw 5 by the deflection adjustment pulleys 32, 34, the moving mechanism 76 is used to move the wire saw mechanism 8 to the nearest position in the T4 direction of the wire saw 5, ie, the cutting position p4. Let Specifically, the connecting portion 75 is advanced from the hydraulic cylinder 72 toward the near side in the direction T4 so that the state shown in the upper part of FIG. 5 is changed to the state shown in the upper part of FIG. At this time, the deflection adjusting pulleys 32 and 34 are moved to the upper side in the T3 direction by a drive device or the like (see FIG. 1) to reduce the deflection of the wire saw 5. As shown in the lower part of FIG. 6, the wire saw 5 inserted into the cutting hole H2 is made parallel to the direction of T1 at the cutting position p4 and is linear in a plan view. The positions of the outer lower guide pulleys 28B and 28A are taken back to the near side in the T4 direction according to the distance S2 to be the cutting position p4, and this process is completed.

<Longitudinal Cutting Second Step>
Next, the circulation driving of the wire saw 5 is resumed. In this step, the wire saw 5 is raised by the wire saw mechanism 8 (a portion where the wire saw is inserted in the width direction of the structural member) which is inserted through the cutting hole H2 of the cutting position p4 And cut the underground beam C in the longitudinal direction. Specifically, as shown in FIG. 7, the guide member 44 is raised using the guide member adjustment mechanism while rotating the wire saw 5 at the cutting position p4 in the same manner as in the first step of cutting in the vertical direction. The cutting hole H3 is formed in the underground beam C by this process. When the wire saw 5 reaches above the underground beam C, the cutting hole H3 opens in the upper surface α of the underground beam C to be cut.

<Component member cutting process>
As shown in the upper part of FIG. 8, the structural member C1 cut out by the cutting holes H1, H2, and H3 is taken out from the underground beam C.

  In the case where the underground beam C is cut out over a long cutting distance, as shown in the upper part of FIG. 8, the cutting hole H2 of the cutting position p4 is performed after performing the above-mentioned second cutting step in the vertical direction or the component cutting step. It can be regarded as a core, and the process from the transverse cutting process to the longitudinal cutting second process can be repeated. At the completion of the above-described second step of longitudinal cutting, the cutting holes H2 at both ends in the T1 direction of the underground beam C reach the cutting position p5. Therefore, when performing the lateral cutting process from the cutting hole H2 of the cutting position p4, while rotating the wire saw 5 in a circulating manner, the deflection adjusting pulleys 32, 34 in the T3 direction at a pace that does not increase the deflection of the wire saw 5. Return to the down side. Further, without moving the drive unit 14, the connecting unit 75 is retracted from the hydraulic cylinder 72 to the far side in the direction T4. When the deflection of the wire saw 5 disappears and the outer lower guide pulleys 28B and 28A reach the cutting position p5, the connecting portion 75 is fixed. After that, the position of the drive unit 14 is once fixed, and the wire saw 5 (that is, the guide frame 10) is moved to the back side in the T4 direction as in the above-described lateral direction cutting step. The underground beam C can be efficiently cut in the lateral direction by moving it to the far side of the direction. Thereafter, as described above, the process from the transverse cutting step to the longitudinal cutting second step may be repeated.

  By performing each of the above steps, the cutting operation of the underground beam C is completed.

  As described above, according to the cutting apparatus 1 and the cutting method of the present embodiment, the deflection adjusting pulleys 32, 34 are moved along the direction T3 to guide the entire length of the endless loop wire saw 5 as a guide. The length of the wire saw 5 present inside the frame 10 can be adjusted. By adjusting the length of the wire saw 5 present inside the guide frame 10, the length of the wire saw 5 penetrating the underground beam C can be adjusted, and the deflection of the wire saw 5 illustrated in the upper portion of FIG. It can be reduced. That is, the deflection of the wire saw 5 penetrating the underground beam C can be reduced by the deflection adjusting pulleys 32 and 34. At this time, by operating the moving mechanism 76 and advancing and retracting the connecting portion 75 with respect to the hydraulic cylinder 72, the deflection of the wire saw 5 can be adjusted without changing the position of the driving portion 14. Therefore, after the pilot hole R is formed and the underground beam C is cut in the longitudinal direction, once the cutting device 1 is installed above the underground beam C, the underground beam C is installed without replacing the cutting device 1. You can make a lateral cut of the By this, compared with the operation | work which performs extensive installation replacement of a cutting device like before, the efficiency of the cutting operation of the underground beam C can be improved, and operation | work time can be shortened.

  Further, according to the cutting device 1 of the present embodiment, the deflection adjusting pulleys 32, 34 are brought close to and separated from the inner guide pulleys 31, 33, 35 adjacent to each other along the wire saw 5 in the T2 direction. As a result, the length of the wire saw 5 wound between the deflection adjusting pulleys 32, 34 and the deflection adjusting pulleys and the inner guide pulleys 31, 33, 35, 38 is increased or decreased, and the outer lower guide pulleys 28B, 28A. The deflection of the wire saw 5 wound between can be adjusted simply and efficiently.

  Moreover, according to the cutting device 1 of this embodiment, the wide underground beam C which can not be coped with by the conventional crusher can be disassembled. By using the cutting device 1, it is possible to realize no vibration, significant noise reduction, and significant dust amount reduction, as compared to the conventional giant breaker method. This will greatly contribute to environmental improvement and have a positive impact on the neighborhood of cutting work.

  Further, according to the cutting device 1 of the present embodiment, the outer lower guide pulleys 28B and 28A can be pivoted about the guide members 44 and 44. By this, according to the cutting direction of underground beam C, the guide direction of wire saw 5 can be changed smoothly. For example, in the case where the underground beam C is cut in the longitudinal direction, the outer lower guide pulleys 28B and 28A extend along the direction T1 in plan view. When the underground beam C is cut in the lateral direction, the outer lower guide pulleys 28B and 28A turn from the T1 direction toward the T3 direction in plan view according to the amount of deflection of the wire saw 5. Since the outer lower guide pulleys 28B and 28A are thus pivoted, the addition to the connection fitting 48 for connecting the outer lower guide pulleys 28B and 28A and the guide members 44 can also be reduced.

  Although the preferred embodiments of the present invention have been described above in detail, the present invention is not limited to the specific embodiments, and various modifications may be made within the scope of the present invention as set forth in the appended claims. Changes are possible.

  For example, in the above embodiment, the moving mechanism 76 including the hydraulic cylinder 72 and the connecting portion 75 is illustrated, but the configuration of the moving mechanism 76 is particularly limited as long as the wire saw mechanism 8 can be moved along the T3 direction. I will not.

  For example, in the above-described embodiment, the guide members 44, 44 are indirectly connected to the drive unit 14 via the guide frame 10 and the moving mechanism 76, but the guide members 44, 44 are directly connected to the side surfaces of the drive unit 14 or the like. It may be connected.

  For example, the plurality of pulleys of the wire saw mechanism 8 may be additionally provided with a tension pulley that holds the tension of the wire saw 5 constant.

1 Cutting device (cutting device of component members)
5 Wire saw 8 Wire saw mechanism 26 Drive pulleys 32, 34 Deflection adjustment pulleys 28A, 28B Outer lower guide pulley (lower guide pulley)
44 Guide member 76 Moving mechanism C Underground beam (structural member)

Claims (4)

A cutting device for a structural member provided with a wire saw mechanism for cutting a structural member, comprising:
The wire saw mechanism is
With multiple pulleys,
A wire saw that is wound around the plurality of pulleys in an endless loop, and is rotated;
Equipped with
The plurality of pulleys include a drive pulley for rotating the wire saw and a deflection adjusting pulley for adjusting the deflection of the wire saw.
A drive unit for driving the drive pulley and the deflection adjustment pulley;
A moving mechanism provided in the drive unit for moving the wire saw mechanism along a cutting direction;
A cutting device for a structural member, comprising: The plurality of pulleys further include lower guide pulleys on both sides of the structural member along the width direction of the structural member,
The structure according to claim 1, wherein the deflection adjusting pulley adjusts the deflection of the wire saw wound between the lower guide pulleys by approaching and separating the plurality of adjacent pulleys along the wire saw. Parts cutting device. The plurality of pulleys further include lower guide pulleys on both sides of the structural member along the width direction of the structural member,
The apparatus further comprises a guide member connected to the drive unit and movably supporting the lower guide pulley along the longitudinal direction.
The structural member cutting apparatus according to claim 1, wherein the lower guide pulley is pivotable about the guide member. A method of cutting a structural member using the structural member cutting device according to any one of claims 1 to 3,
A lateral direction in which the wire saw mechanism is moved to the back side in the cutting direction of the structural member while the wire saw inserted in the width direction of the structural member is circulated and rotated, and the structural member is cut in the lateral direction A cutting process,
A takeback step of moving the wire saw mechanism to the nearest position of the wire saw in the cutting direction while reducing the deflection of the wire saw with the deflection adjusting pulley;
A longitudinal cutting step of cutting the structural member in the longitudinal direction by raising the part where the wire saw is inserted in the width direction of the structural member by the wire saw mechanism while circulating and rotating the wire saw;
A method of cutting a structural member, comprising:

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