JP2017144666A - Wire saw cutting device and cutting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire saw cutting device and method for efficiently cutting objects to be cut having various shapes while suppressing scattering of dust generated at the time of cutting.SOLUTION: A wire saw cutting device 10 includes a body part 20 and a pair of stand parts 50 mounted to the body part 20 with a space therebetween. The body part 20 includes a case member 22 having built-in pulleys 25-28 around which a wire 60 is wound, and is mounted with dust collecting hoses connected to a dust collecting device. Each stand part 50 has a hollow offset stand and an offset pulley attached to a tip end of the offset stand and around which the wire 60 is wound, and is mounted to the body part 20 so that a mounting angle can be changed. At the time of cutting, the stand parts 50 of the wire saw cutting device 10 are inserted into two holes formed in a truncated chevron shape in a reinforced concrete block, and the wire saw cutting device 10 is installed so as to contact the reinforced concrete block.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wire saw cutting apparatus and a cutting method for cutting with a wire.

  In cutting an object, a wire saw that cuts by rotating a wire at high speed may be used. In this case, a dry-type wire saw method has also been studied (for example, see Non-Patent Documents 1 and 2). In the techniques described in Non-Patent Document 1 and Non-Patent Document 2, a plurality of pulleys are installed on reinforced concrete, which is an object to be cut, on a pillar, and a wire is wound around these pulleys. Further, a wire guard is disposed at a position where the wire is disposed.

  When a wire saw is used, a large amount of dust (cutting powder) generated by cutting is scattered. For this reason, a dry-type wire saw that suppresses the scattering of cutting powder has also been studied (for example, see Patent Document 1). In the wire saw cutting device described in this patent document, a plurality of guide pulleys for guiding the traveling direction of the wire traveling from the object to be cut toward the drive pulley are accommodated in the dustproof cover. In the dust-proof cover, there are provided an air nozzle that blows compressed air from the direction opposite to the traveling direction of the wire to blow off the cutting powder, and a suction port of an exhaust device that sucks the cutting powder. A cutting part cover that conceals the cutting part is attached to the surface of the object to be cut, and a wire runs inside the cutting part cover so that the inside of the cutting part cover communicates with the inside of the dust cover. In this wire saw cutting device, the path of the wire from the drive pulley to the object to be cut is exposed to the outside.

Japanese Patent Laying-Open No. 2013-10297 (first page, FIG. 1)

Diamond Kiko, “Dry Wire Saw Method”, [online], Diamond Kiko Co., Ltd. website, [Search January 5, 2015], Internet <http://www.diamond-kiko.co.jp/kansiki.html > Consec, Inc., “Dry Wire Sewing System”, [online], Consec, Inc. Homepage, [Search January 5, 2015], Internet <http://www.consec.co.jp/seihin/04010301.htm >

  However, when a wire saw cutting device is used, it is necessary to prevent scattering of cutting powder from a portion exposed to the outside. Furthermore, if the burden of installation work at the cutting site is large, efficiency cannot be achieved. Moreover, when cutting structures of various shapes, it may be better to cut on a surface having a shape other than a rectangular shape. For example, there is a need to cut and disassemble cylindrical concrete into a fan shape from the inside. In this case, efficient dust collection is difficult and the work burden is large.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to cut a wire saw for efficiently cutting a cutting object having various shapes while suppressing scattering of dust generated during cutting. An apparatus and a cutting method are provided.

  A wire saw cutting device that solves the above problems includes a wire driving unit that winds and rotates a wire for cutting a cutting target, a tension applying unit that applies tension to the wire to press the wire against the cutting target, A case member including the wire driving unit and the tension applying unit; and a pair of stand units fixed to a main body unit holding the case member, wherein each of the stand units includes a distal end side and a main body unit side. A hollow offset stand provided with an opening is provided, and an offset portion for winding the wire is attached to a tip of the offset stand, and each stand portion changes a relative position with respect to the main body portion. It is attached to the main body part as possible. Here, the relative position with respect to the main body refers to an attachment angle or an attachment position of the stand portion with respect to the main body. Thereby, the wire saw can be installed by inserting the stand portion of the wire saw cutting device into the pair of holes formed in the cutting target and bringing the wire saw cutting device into contact with the cutting target. For example, a stand part can be inserted and arranged in a hole whose interval increases from the contact surface to the back, and the object to be cut can be cut by a trapezoidal surface along the shape of a pair of holes. Therefore, various shapes of cutting objects can be efficiently cut. Further, the cutting powder generated in the hole is discharged from the tip of the offset stand through the hollow portion of the offset stand. Accordingly, the dust generated by the cutting can be efficiently discharged from the path through which the wire rotating for cutting passes, and the scattering of the dust to the outside of the wire saw cutting device can be suppressed. .

  In the wire saw cutting device, the stand portion is attached to the main body portion via an attachment mechanism, and the attachment mechanism can change the attachment position of the base portion of the stand portion with respect to the main body portion. It is preferable that the position change mechanism part which performs and the angle change mechanism part which can change the attachment angle with respect to the said main-body part of the said stand part are provided. Thereby, each stand part can change the relative position with respect to a main-body part with a position change mechanism part and an angle change mechanism part.

  In the said wire saw cutting device, it is preferable to provide an annular seal member on the contact surface of the main body portion with the object to be cut. Thereby, since the contact part of a wire saw cutting device and a cutting target object can be stuck, scattering of dust can be controlled more certainly.

  In the wire saw cutting device, it is preferable that the main body portion is provided with an exhaust means for exhausting the space surrounded by the seal member. Thereby, since dust is discharged | emitted with the exhaust_gas | exhaustion of this space, scattering of dust can further be suppressed.

  In the said wire saw cutting device, it is preferable in the said main-body part that the contact surface side with the said cutting target object is comprised by the shape along the surface shape of the said cutting target object. Thereby, the main-body part of a wire saw cutting device can be hold | maintained more reliably along the contact surface of a cutting target object.

  In the wire saw cutting device, the stand portion includes a cover portion that covers the offset stand in a state where the tip end side of the offset stand is closed, and the cover portion has an opening for exposing the wire. It is preferable to be provided. Thereby, when the chip is carried by the wire, it reaches the vicinity of the offset portion in the cover portion. For this reason, chips collect near the opening on the tip side of the offset stand, and are difficult to be scattered on the outer periphery of the cover portion. Furthermore, since the volume of the inside of the cover portion is smaller than that of the hole into which the offset stand is inserted, dust can be efficiently discharged from the inside of the cover portion through the opening of the offset stand.

  In the above-mentioned wire saw cutting device, it is preferable that the stand portion is attached with a rotatable sliding portion protruding in a direction in contact with the wall surface of the hole into which the stand portion is inserted. Thereby, since the sliding part of a stand part contacts to the inner peripheral surface of a hole, sliding, a stand part can be smoothly inserted in a hole.

  In the wire saw cutting device, it is preferable that the tension applying unit includes a plurality of tension feed pulleys movable in the extending direction of the offset stand. Thus, the tension can be applied by winding the wire so as to be folded back, so that the tension adjustment range can be increased even if the distance for moving each tension feed pulley is shortened.

  In the said wire saw cutting device, it is preferable to provide the tension adjusting part which winds the said wire and adjusts the tension | tensile_strength of the said wire in the said case member. Thereby, since the tension of the wire can be adjusted to be substantially constant, even when the tension applied to the wire changes, such as at the start of cutting or at the end of cutting, the falling of the wire from each pulley can be suppressed.

  According to the present invention, it is possible to efficiently cut various shapes of cutting objects while suppressing the scattering of dust generated during cutting.

The perspective view which shows the whole wire saw cutting device of this embodiment. The perspective view of the wire saw cutting device seen from the stand part side of this embodiment. The perspective view of the wire saw cutting device seen from the back surface side of the case member of this embodiment. It is explanatory drawing explaining the principal part of the wire saw cutting device of this embodiment, (a) is the front view of the state which removed the side wall of the main-body part 21, and the cover part of a stand part, (b) is the side surface of a stand part. The figure, (c) is an enlarged view of the principal part at the time of moving the attachment member in (a). FIG. 5B is a cross-sectional view taken along line 5-5 in FIG. The flowchart explaining the cutting method using the wire saw cutting device of this embodiment. It is explanatory drawing explaining the cutting method using the wire saw cutting device of this embodiment, Comprising: (a) is a plane sectional view, (b) is an enlarged view of the principal part.

Hereinafter, an embodiment of a wire saw cutting device and a cutting method will be described with reference to FIGS.
FIG. 1 is a perspective view showing the entire wire saw cutting apparatus 10 according to the present embodiment. The wire saw cutting apparatus 10 includes a main body portion 20 in which an internal space is formed, and a pair (two) of stand portions 50 extending from the main body portion 20. Furthermore, the wire saw cutting device 10 includes a wire 60 that winds in the internal space of the main body 20 and the outer periphery of the stand 50.

  The main body 20 includes a base member 21 and a case member 22. The base member 21 has a substantially square ring shape, and the stand portion 50 passes therethrough as will be described later. In the base member 21, the case member 22 is attached to the opposite side of the region where the stand portion 50 protrudes. The case member 22 as a whole has a rectangular parallelepiped shape of about 1.5 m × about 1.5 m × about 0.3 m. One surface (the front side in FIG. 1) of the case member 22 is configured by a transmission plate, and is configured to be parallel to a plane including the pair of stand portions 50.

  FIG. 2 is a perspective view of the main body unit 20 as viewed from the stand unit 50 side. As shown in FIG. 2, the case member 22 is formed with a substantially rectangular parallelepiped internal space having an open side surface (the lower surface in FIG. 1) on the base member 21 side. Further, in the present embodiment, the case member 22 is provided with both end portions 22a on the stand portion 50 side so as to protrude to the back side. A fixing member 41, which will be described later, is disposed in the case member 22 in the both end portions 22a.

  As shown in FIG. 1, a drive pulley 25, a first pulley 26, a second pulley 27, and a third pulley 28 are accommodated in the internal space of the case member 22. A wire 60 is wound around each pulley (25 to 28). The wire 60 is wound around the drive pulley 25, the third pulley 28, the second pulley 27, the third pulley 28, the first pulley 26, the third pulley 28, the first pulley 26, and the third pulley 28 in this order. . Further, the wire 60 extends from the third pulley 28 disposed at the end of the case member 22 to a later-described fourth pulley 44, an offset pulley 53, two hooking pipes 45a, an offset pulley 53, and a fourth pulley 44. And then reaches the drive pulley 25. The wire 60 is a diamond wire used in a known dry wire saw cutting apparatus.

The drive pulley 25 functions as a wire drive unit, has a larger diameter than the first pulley 26 to the third pulley 28, and transmits a rotational force to the wire 60.
The first pulley 26 functions as a tension applying unit, and is a tension feed pulley for applying a tension that presses the wire 60 against the object to be cut. In the present embodiment, two first pulleys 26 that move in conjunction with each other are used. Each first pulley 26 is arranged to be movable by a moving mechanism (not shown) in the same direction as the extending direction of the stand portion 50 (the vertical direction in FIG. 1). Between the two first pulleys 26, a third pulley 28 (guide pulley) whose position is fixed is disposed. At the time of cutting, the first pulley 26 is moved away from the third pulley 28 to apply tension to the wire 60 and press the wire 60 against the object to be cut.

  In addition, a slit through which the rotation shaft of the first pulley 26 passes is formed on the back surface (the back surface in FIG. 1) of the case member 22 corresponding to the movable range of the first pulley 26. This slit is covered with a covering member 29a. The covering member 29 a is made of a flexible material for closing the slit around the moving range of the first pulley 26.

  The second pulley 27 is a tension pulley that functions as a tension adjusting unit. The second pulley 27 is rotatably attached to the front end of the surface of the arm 27a. The arm 27a is supported by a support column 37b described later via a connecting member so as to be swingable.

  The tip of a spring unit (not shown) is attached to the back side of the base of the arm 27a. The spring unit is fixed outside the case member 22. The spring unit incorporates a spring, and a rotating shaft portion attached to the spring is inserted into the case member 22. The tip (second pulley 27) of the arm 27a attached to the rotating shaft is biased upward by a spring. A third pulley 28 (guide pulley) having a fixed position is also disposed between the second pulley 27 and the drive pulley 25 and between the second pulley 27 and the first pulley 26. The second pulley 27 changes the distance from the third pulley 28 according to the tension change of the wire 60 by the biasing force from the spring unit, and keeps the tension of the wire 60 substantially constant.

  Moreover, the opening part covered with the coating | coated member 29b is formed in the back surface (back surface in FIG. 1) of the case member 22. As shown in FIG. The rotation shaft portion of the spring unit and the connecting member of the arm 27a pass through the opening. The covering member 29b is made of a flexible material that can close a region other than the through portion in the opening when the connecting member of the arm 27a swings.

  FIG. 3 is a perspective view of the wire saw cutting device 10 viewed from the back side of the case member 22. A drive motor 35 that rotates the drive pulley 25 is attached to the back surface of the case member 22. In the present embodiment, a servo motor is used as the drive motor 35.

  Further, a plurality of frames F <b> 1 are combined and attached to the back surface of the case member 22. The frame F1 is provided with a guide bar 37a extending in the extending direction of the stand unit 50. The guide bar 37 a is disposed at a position corresponding to the first pulley 26. A moving body that moves the first pulley 26 is provided on the guide bar 37a. A moving motor 36 for moving the position of the first pulley 26 is attached to the moving body provided on the guide bar 37a. The moving motor 36 rotates so as to move the first pulley 26 at a speed corresponding to the cutting speed of the wire saw cutting device 10.

A support pillar 37b is fixed to the frame F1. The support column 37b supports the spring unit and the arm 27a in a swingable manner.
Further, a pair (two) of insertion brackets 39 are provided at predetermined intervals on the back surface side of the frame F <b> 1 of the case member 22. The insertion bracket 39 functions as a conveyance support portion and has a hollow quadrangular prism shape with both upper and lower sides opened. The insertion bracket 39 is used for inserting a fork of a forklift when the wire saw cutting device 10 is moved. The insertion bracket 39 is arranged so that the center of gravity of the wire saw cutting device 10 is positioned between the forks when the fork of the forklift is inserted and the wire saw cutting device 10 is lifted.

  Further, a rectangular parallelepiped auxiliary base member 24 is attached to the back surface of the base member 21. On the upper surface of the auxiliary base member 24, the plurality of frames F1 described above are fixed.

  Further, as shown in FIG. 1, a contact member 40 that protrudes toward the stand portion 50 is attached to the square annular base member 21. In the present embodiment, assuming a cutting in a cylindrical cutting object, it has a subarc shape along the shape (arc) of the contact surface of the cutting object. The contact member 40 includes a sub-arc surface member 40a and a thin plate member 40b that supports the member. The inferior arc surface member 40a has an inferior arc shape that is bent into an arc so that the center protrudes toward the stand unit 50, and a slit-like opening is formed in the center of the inferior arc shape. In addition, the front side and the back side of the contact member 40 are sealed with a plate member or the like to make the inside a closed space, and the suction force through the dust collection hose 33 described later is improved, thereby improving the dust collection efficiency. Also good.

  As shown in FIG. 2, the base member 21 and the contact member 40 are formed with a space 31 having a shape that allows the opening of the case member 22 and the opening of the contact member 40 to face from the stand portion 50 side. An annular seal member 32 is attached to the outer peripheral edge of the side surface of the contact member 40 on the stand portion 50 side so as to protrude toward the stand portion 50 side. The seal member 32 is deformed according to the wall surface of the object to be cut with which the wire saw cutting device 10 comes into contact, and closely attaches the connecting portion between the wall surface and the contact member 40 (base member 21).

  Further, two through holes reaching the space 31 are formed in the base member 21. A dust collection hose 33 communicating with each through hole is attached to each through hole. The dust collection hose 33 functions as an exhaust means and is connected to a dust collection device (not shown). This dust collecting device sucks the space of the opening of the contact member 40, the space 31 of the base member 21, and the internal space of the case member 22 through the dust collecting hose 33, and dust in these spaces is removed from the wire saw cutting device 10. Discharge to the outside.

  FIG. 4A shows a mechanism below the case member 22 and in the opening of the base member 21. As shown to Fig.4 (a), a pair of stand part 50 has the left-right symmetric structure. Each stand unit 50 includes an offset stand 51, an offset pulley 53 as an offset unit, and a cover unit 59 (not shown in FIG. 4A).

  Fixing members 41 each having a rectangular parallelepiped shape are attached to both end portions of the case member 22 on the stand portion 50 side. Two guide shafts 42 are attached in parallel to the end portion of each fixing member 41 on the stand portion 50 side. Two attachment members 43 are slidably attached to the guide shafts 42. Specifically, the mounting member 43 is formed with two parallel through holes. A guide shaft 42 is inserted through each through hole. When the mounting member 43 slides on the guide shaft 42, the mounting position (the position in the left-right direction of the main body 20) of each stand 50 with respect to the main body 20 can be changed. In the present embodiment, the fixing member 41, the guide shaft 42, and the attachment member 43 constitute a position changing mechanism. The position changing mechanism unit changes the mounting position of the stand unit 50 in the left-right direction with respect to the main body unit 20.

  FIG. 4C is an enlarged view of the left mounting member 43 in FIG. Since the mounting member 43 is mounted symmetrically, the left mounting member 43 will be described, and the description of the right mounting member 43 will be omitted.

  A fourth pulley 44 is rotatably attached to the front side on the end side (fixed member 41 side) of each attachment member 43. The fourth pulley 44 is a guide pulley that guides the wire 60 by winding the wire 60. The fourth pulley 44 is disposed between a pulley (here, the drive pulley 25) disposed at an end in the case member 22 and an offset pulley 53 described later.

  On the center side of the attachment member 43, a latching member 45 that protrudes toward the stand portion 50 is attached. The hooking member 45 has a through hole at the tip thereof. A latching pipe 45a is detachably fitted in the through hole. The wire 60 before starting cutting is hooked on the hooking pipe 45a. In this embodiment, when the wire saw cutting device 10 is operated, the wire 60 cuts the object to be cut after cutting the hooking pipe 45a.

  At the center of each attachment member 43, the end of the fixed hinge portion 47 of the plate-like member is fixed. The fixed hinge portion 47 has a tip protruding from the mounting member 43 toward the stand portion 50 side. A rotatable hinge shaft is inserted through the distal end of the fixed hinge portion 47. A base portion 49 of an offset stand 51 of the stand portion 50 is fixed to the hinge shaft via an arm portion 48. For this reason, the base portion 49 of the offset stand 51 swings around the rotation axis C1 of the hinge shaft. In the present embodiment, the attachment member 43, the fixed hinge portion 47, the arm portion 48, and the base portion 49 constitute an angle changing mechanism portion. The angle changing mechanism unit changes the mounting posture (mounting angle) of the stand unit 50 with respect to the main body unit 20.

  As shown in FIG. 4A, in this embodiment, the pair of offset stands 51 are attached to the main body 20 so as to have a “C” shape with the distal end widened, with a space therebetween. It has been. Here, the attachment angle of the pair of offset stands 51 with respect to the main body 20 can be changed within a predetermined movable range. In this embodiment, it is determined as the attachment range according to the arc of the contact surface of the cutting object.

  FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. The offset stand 51 is configured by nesting two hollow tube members 51a and 51b having different square cross sections. The offset stand 51 can be expanded and contracted by sliding the pipe members 51a and 51b. The offset stand 51 has an opening on the tip side. The opening communicates with the hollow portion of the offset stand 51 and functions as a dust collection port. Further, an opening that communicates with the hollow portion of the offset stand 51 is provided on the base end side (the main body 20 side) of the offset stand 51.

  As shown in FIG. 4A, an offset pulley 53 is rotatably attached to one side surface of the tip end portion of the offset stand 51. The offset pulley 53 is a pulley for passing the wire 60 in order to cut and cut. The offset pulley 53 is attached to the distal end portion in the extending direction of the offset stand 51 so as to protrude from the distal end of the offset stand 51.

  In the present embodiment, the offset pulley 53 is a pulley having a pulley diameter of 150 mm. The offset pulley 53 has a longer wire saw operating time (endurance time) as the pulley diameter is larger. Further, when the pulley diameter of the offset pulley 53 is 150 mm, the deformation amount (wear amount) of the pulley is reduced by about 1/5 times compared to the case of 130 mm.

  FIG. 4B is a view of the stand unit 50 as viewed from the side. A partition member 54 is attached to the shaft support portion of the offset pulley 53. The partition member 54 abuts on the tip of the cover part 59 and provides a gap around the opening so that the opening on the tip side of the offset stand 51 is not blocked by the cover part 59.

  Further, as shown in FIG. 5, a roller attachment member 56 is fixed to the offset stand 51. The roller mounting member 56 includes a spherical roller 57 as a plurality (four) of sliding portions. The roller mounting member 56 supports each roller 57 rotatably. The roller mounting member 56 holds a plurality of rollers 57 at equal intervals around the offset stand 51 so that the tips of the rollers 57 are all on the same circumference. Further, the roller mounting member 56 is formed with a pair of opposed groove portions 56a. A wire 60 is loosely fitted in the groove 56a.

  As shown in FIGS. 2 and 4B, the offset stand 51 of the stand unit 50 is accommodated in the cover unit 59. The cover portion 59 has a long shape with the tip portion closed so as to cover the offset stand 51. The cover part 59 is attached to the offset stand 51 on the opening side (base end side of the offset stand 51). Further, the cover 59 is formed with an opening 59 a corresponding to the position where the wire 60 is disposed. The opening 59 a has an elongated groove shape extending in the extending direction of the offset stand 51. Further, the cover 59 is formed with a hole 59 b that exposes each roller 57 corresponding to the position of each roller 57.

  Next, a cutting method using the wire saw cutting device 10 will be described with reference to FIGS. 6 and 7. When a part of the object to be cut (in this embodiment, the reinforced concrete block 70) is cut out, horizontal cutting (horizontal cutting) and cutting in a direction perpendicular to the cutting (side cutting and back cutting) are combined. In the horizontal cutting, a pair of offset stands 51 are arranged on a horizontal plane and cut into a plane extending in the horizontal direction. In the side cutting, a pair of offset stands 51 are arranged on a vertical surface, and the side surface is cut into a plane extending in the vertical direction. In the rear cutting, a pair of offset stands 51 are arranged on a vertical surface, and the rear surface is cut into a plane extending in the vertical direction. In this embodiment, as shown to Fig.7 (a), a part of cylindrical reinforced concrete block 70 is cut | disconnected by a substantially trapezoid surface in a horizontal direction (horizontal cutting). Hereinafter, this horizontal cutting will be described in detail.

  First, a punching process for inserting an offset stand is executed (step S1). Specifically, two holes 71 for inserting the stand unit 50 are formed in the reinforced concrete block 70 using a known core drill. In the present embodiment, these two holes 71 are formed in a “C” shape in which the distal end side is widened with a space therebetween.

Next, installation processing of the wire saw cutting device 10 is executed (step S2). Specifically, the offset stand 51 of the wire saw cutting device 10 is expanded and contracted so as to be slightly shorter than the length of the hole 71. Further, the attachment members 43 are arranged at intervals at which the stand portions 50 can be inserted into the holes 71.
Next, the pair of forks of the forklift is inserted into the insertion bracket 39 of the wire saw cutting device 10 to lift the wire saw cutting device 10.

  Next, as shown by a virtual line (two-dot chain line) in FIG. 7A, the fork is moved and the pair of stand portions 50 of the wire saw cutting device 10 are inserted into the holes 71. In this case, in the offset stand 51 of each stand unit 50, each roller 57 comes into contact with the inner peripheral surface of the hole 71.

  Then, as shown in FIG. 7B, as the offset stand 51 is inserted into the hole 71, the base portion 49 of the offset stand 51 rotates about the rotation axis C1 as indicated by a solid line from a virtual line. . In this case, depending on the interval of the holes 71, the attachment member 43 slides on the guide shaft 42. The stand unit 50 is inserted into the hole 71 in a posture along the shape of the hole 71. Further, in this case, the roller 57 of each stand unit 50 slides while contacting the inner peripheral surface of the hole 71.

  As shown by the solid line in FIG. 7A, the stand portion 50 is inserted into the hole 71 until the contact member 40 of the wire saw cutting device 10 comes into close contact with the installation surface 70 a of the reinforced concrete block 70. In this case, the contact member 40 of the wire saw cutting device 10 contacts the reinforced concrete block 70 via the seal member 32, and closely contacts the connection portion between the contact member 40 and the reinforced concrete block 70.

Next, a cutting process is executed (step S3).
Here, first, a suction start process is executed (step S3-1). Specifically, the dust collecting device connected to the dust collecting hose 33 is operated. Thereby, the air inside the case member 22, the base member 21, and the contact member 40 is discharged through the dust collection hose 33. Further, air at the tip of the hole 71 is discharged from the opening (dust collecting port) of the offset stand 51 into the base member 21 and the contact member 40 through the offset stand 51, and the dust collecting hose 33 is discharged from this inside. Is discharged through.

Next, an operation process of the drive pulley is executed (step S3-2). Specifically, the drive motor 35 is operated and the wire 60 is rotated.
Then, movement of the first pulley and tension adjustment processing by the second pulley are executed (step S3-3). Specifically, the moving motor 36 is operated, and the first pulley 26 is gradually moved away from the reinforced concrete block 70. Thereby, the wire 60 rotated at high speed first cuts the hooking pipe 45a. Here, when the tension applied to the wire 60 changes due to the cutting of the latching pipe 45a, the second pulley 27 moves relative to the third pulley 28 by the urging force of the spring unit. Is almost constant.

  When the hooking pipe 45a has been cut, the wire 60 cuts the reinforced concrete block 70. In this case, the moving speed of the first pulley 26 is adjusted so that the change in tension applied to the wire 60 falls within a predetermined range. Thereby, the slack of the cut wire 60 is wound up by the first pulley 26, and the wire 60 is pressed against the reinforced concrete block 70. In this case, the wire 60 gradually moves in the direction of the tip of the hole 71 while gradually cutting the reinforced concrete block 70 between the offset stands 51 from the opening side of the hole 71. Even during cutting, when the tension applied to the wire 60 changes, the second pulley 27 moves relative to the third pulley 28 to keep the tension of the wire 60 substantially constant.

  When the wire 60 moves to the vicinity of the position connecting the tips of the two offset pulleys 53 and the cutting is completed, the pulley operation stop process is executed (step S3-4). Specifically, the movement motor 36 is stopped and the movement of the first pulley 26 is stopped. Further, the drive motor 35 is stopped.

Next, a suction stop process is executed (step S3-5). Specifically, the dust collecting device connected to the dust collecting hose 33 is stopped.
As described above, the region between the offset stands 51 of the wire saw cutting apparatus 10 is cut into a horizontal plane.

Then, each stand part 50 is pulled out from the hole 71. Also in this case, each stand part 50 contacts the hole 71 and receives a force from the contacted hole 71. Thereby, in each stand part 50, the base part 49 of the offset stand 51 rotates about the rotation axis C <b> 1 so as to match the shape of the hole 71, and the attachment member 43 slides on the guide shaft 42.
In the side cutting and the back cutting, a pair of holes are formed in parallel, a stand part of a wire saw cutting device is inserted into each hole, and cutting is performed in the same manner as the horizontal cutting described above.

According to this embodiment, the following effects can be obtained.
(1) The wire saw cutting device 10 of the present embodiment includes a main body 20 and a pair of stands 50. The main body 20 includes a case member 22 containing a pulley (25 to 28) around which a wire 60 is wound, and a base member 21 to which a dust collecting hose 33 is connected. Each stand unit 50 includes a hollow offset stand 51 to which an offset pulley 53 around which the wire 60 is wound is attached. The opening on the distal end side of the offset stand 51 communicates with the space 31 of the base member 21 through the opening on the proximal end side. At the time of cutting, the stand part 50 is inserted into the two holes 71 formed in the reinforced concrete block 70, and the wire saw cutting device 10 is installed so as to contact the reinforced concrete block 70. Thereby, the assembly of a wire saw can be simplified in the cutting work place of the reinforced concrete block 70. FIG. Further, the cutting powder generated in the hole 71 is discharged from the tip of the offset stand 51 through the hollow portion of the offset stand 51 and the dust collecting hose 33. Thereby, the dust generated by the cutting can be efficiently discharged without scattering the dust from the path through which the wire 60 rotating for cutting passes, and the scattering of the dust to the outside of the wire saw cutting device 10 is suppressed. be able to.

  (2) A contact member 40 having an arc shape is attached to the base member 21 of the wire saw cutting apparatus 10 of the present embodiment on the stand portion 50 side. For this reason, it is made to match with the surface shape of the reinforced concrete block 70, and the wire saw cutting device 10 can be more reliably held along the surface shape of the reinforced concrete block 70.

  (3) In the present embodiment, the seal member 32 is attached to the outer peripheral edge of the base member 21 so as to surround the outer periphery. Thereby, the contact part of the wire saw cutting device 10 and the reinforced concrete block 70 can be stuck more reliably.

  (4) In the present embodiment, a dust collecting hose 33 that exhausts the space 31 is attached to the base member 21. An opening on the main body 20 side of the offset stand 51 opens into the space 31. Thereby, since dust is discharged | emitted with the exhaust_gas | exhaustion of this space 31, the dust which arrived at the space 31 via the offset stand 51 can be discharged | emitted efficiently.

  (5) In the present embodiment, the base portion 49 of the offset stand 51 of the stand portion 50 is configured to be swingable about the rotation axis C <b> 1 of the main body portion 20. Thereby, the offset stand 51 is inserted into the hole 71 while changing the attachment angle with respect to the main body 20 according to the shape of the hole 71. Therefore, the stand part 50 can be arrange | positioned in the fan shape which spreads from the contact surface to the back, and the reinforced concrete block 70 can be cut | disconnected by the horizontal cut surface along this fan shape.

  (6) The offset stand 51 of this embodiment is attached to the attachment member 43 that slides on the guide shaft 42 so that the interval between the pair of stand portions 50 can be changed. Thereby, when it is necessary to widen the space between the stand portions 50 when inserting the stand portion 50 into the hole 71, the space between the pair of stand portions 50 is reduced by the pressing force from the wall surface of the hole 71. Naturally spread. Therefore, the stand part 50 can be smoothly inserted into the hole 71.

  (7) The 4th pulley 44 is rotatably attached to the attachment member 43 of this embodiment. The fourth pulley 44 is disposed between a pulley disposed at an end in the case member 22 and an offset pulley 53 described later. For this reason, even when the position of the attachment member 43 is changed and the position of the offset pulley 53 is changed with respect to the pulley arranged at the end in the case member 22, the wire 60 is smoothly guided to the stand unit 50. be able to.

  (8) The stand unit 50 of the present embodiment includes a cover unit 59 that covers the offset stand 51. An opening 59 a corresponding to the position where the wire 60 is disposed is formed in the cover portion 59. Thereby, the chips are conveyed by the wire 60 and reach the vicinity of the offset pulley 53 in the cover portion 59. For this reason, chips collect near the opening on the front end side of the offset stand 51 and are not easily scattered on the outer periphery of the cover portion 59. Furthermore, since the volume in the cover part 59 is smaller than the hole 71 into which the offset stand 51 is inserted, dust can be efficiently discharged from the cover part 59 through the opening of the offset stand 51.

  (9) In the present embodiment, a spherical roller 57 is rotatably attached to the stand unit 50. Thereby, the roller 57 of the stand part 50 abuts on the inner peripheral surface of the hole 71 while sliding, so that the stand part 50 can be smoothly inserted into the hole 71.

  (10) In the present embodiment, two first pulleys 26 that are movable in the extending direction of the stand unit 50 are provided in parallel in the case member 22 of the main body unit 20. As a result, the first pulley 26 can be arranged so that the wire 60 is folded back and tension can be applied to the wire 60, so that the tension adjustment range can be increased even if the distance for moving the first pulley 26 is shortened. Can do.

  (11) In the present embodiment, the main body 20 is provided with an insertion bracket 39 for inserting a fork of a forklift. The insertion brackets 39 each open upward, and a fork can be inserted from here. Thereby, the wire saw cutting apparatus 10 can be conveyed using a forklift.

  (12) In this embodiment, a second pulley 27 that adjusts the tension of the wire 60 is provided in the case member 22 of the main body 20. Thereby, since the tension of the wire 60 can be adjusted to be substantially constant, each of the pulleys (25 to 28, 44) of the wire 60 can be used even when the tension applied to the wire 60 changes greatly, such as at the start or end of cutting. , 53) can be suppressed.

  (13) In the present embodiment, the attaching member 43 is attached with the engaging member 45 to which the engaging pipe 45a is detachably fitted. Thereby, when installing the wire saw cutting device 10, the stand part 50 can be easily inserted into the hole 71 in a state where the wire 60 is passed over the hooking pipe 45a.

Moreover, you may change this embodiment as follows.
In the above embodiment, the case pulley 22 of the wire saw cutting device 10 accommodates the drive pulley 25 and the two first pulleys 26. The number of each pulley is not limited to these. For example, the number of pulleys may be changed according to the size of the cut surface cut by the wire 60 and the shape of the case member 22. Alternatively, the driving pulley 25 and the first pulley 26 may be configured as a single pulley. Furthermore, in the said embodiment, the 1st pulley 26 is arrange | positioned so that it may move to the extension direction of the stand part 50. FIG. The moving direction of the first pulley 26 is not limited to this as long as it is a direction that can apply tension to the wire 60 to press the wire 60 against the object to be cut.

  In the above embodiment, the pair of stand portions 50 of the wire saw cutting apparatus 10 includes the pair of offset stands 51 having a “C” shape. The configuration of the offset stand 51 is not limited to this. For example, a plurality of openings may be provided in the middle of the side surface of the offset stand 51. Here, when the suction force is weakened by increasing the numerical aperture, the opening location may be changed according to the cutting position of the wire. Specifically, a shutter that opens only in the vicinity of the cutting position is provided. And a shutter is controlled and an opening location is moved according to a cutting speed.

  In the above-described embodiment, the pair of stand parts 50 of the wire saw cutting device 10 has a pair of stand parts 50 arranged in a “C” shape in which the distance between the tips is larger than the base part. Yes. Instead, the stand portion 50 may be arranged in an inverted “C” shape in which the interval between the tips is narrower than the base portion. Furthermore, it is good also as a structure which the stand part 50 can turn from the space | interval of a front-end | tip narrower to the wide space | interval than a base part. Thereby, a cutting target object can be cut | disconnected by the cut surface of various shapes.

  In the wire saw cutting device 10 of the above-described embodiment, the stand unit 50 is changed to a position changing mechanism unit that changes the mounting position in the left-right direction with respect to the main body unit 20 and an angle change to change the mounting posture (mounting angle) with respect to the main body unit 20. It attached to the main-body part 20 via the mechanism part. The mechanism is not limited to this as long as the relative position of the stand unit 50 with respect to the main body unit 20 can be changed. For example, a mechanism that can further swing the base unit 49 of the stand unit 50 may be added. .

  In the wire saw cutting device 10 of the above embodiment, the cover portion 59 is provided on the stand portion 50. The mechanism for efficiently discharging dust from the hole 71 is not limited to the cover portion 59, and for example, a mechanism for injecting compressed air may be provided.

  In the wire saw cutting device 10 of the above embodiment, the roller mounting member 56 provided with the four rollers 57 is fixed to the offset stand 51, and the roller 57 is exposed from the hole 59b of the cover portion 59. The structure is not limited to the above as long as it is a rotatable sliding part protruding in a direction in contact with the wall surface of the hole into which the stand part is inserted. For example, you may provide a roller in cover part itself. Furthermore, the structure which has only one roller in the cross section of the stand part 50 may be sufficient. In this case, it is preferable that there are a plurality of rollers on different axes with respect to the extending direction of the stand portion.

  In the above embodiment, the cutting method using the wire saw cutting device 10 has been described. You may enable it to perform this cutting method by remote operation. In this case, a remotely operable core drill or forklift is used. Furthermore, based on the instruction | indication from the control terminal installed in the remote place, it is set as the structure which can control operation | movement of the drive motor 35, the motor 36 for a movement, an air compressor, and a dust collector.

  Then, in the drilling process for inserting the offset stand (step S1), the core drill is operated by remote operation to form the hole 71 in the object to be cut. Next, the forklift is remotely operated to perform installation processing of the wire saw cutting device 10 (step S2). Then, after the suction start process and the drive pulley drive process are executed by remote operation (steps S3-1 to S3-2), the movement of the first pulley and the tension adjustment process by the second pulley are executed (step S3). -3). When it is determined that the cutting has been completed by satisfying a predetermined cutting condition (for example, the position of the first pulley and the tension of the wire 60), the pulley operation stop processing (step S3-4), A stop process is executed (step S3-5). Thereby, it can cut | disconnect based on the instruction | indication from the place away from the cutting target object.

  -In the wire saw cutting device 10 of the said embodiment, the cutting | disconnection in a cylindrical-shaped cutting target object is assumed, and it has the inferior arc shape along the shape (arc) of the contact surface of a cutting target object. The shape of the contact member 40 of the wire saw cutting device 10 is not limited to the inferior arc shape, and may be any shape that follows the shape of the contact surface of the object to be cut. Further, when the contact surface of the main body 20 can contact the contact surface of the object to be cut without a gap by the elastic force of the seal member 32, the contact member 40 may be omitted. Furthermore, the base member 21 of the main body 20 may be configured to be detachable so that contact members along various contact surface shapes can be exchanged.

  C1 ... Rotating shaft, F1 ... Frame, 10 ... Wire saw cutting device, 20 ... Main body, 21 ... Base member, 22 ... Case member, 22a ... End, 24 ... Auxiliary base member, 25 ... Drive pulley, 26 ... First Pulley, 27 ... second pulley, 27a ... arm, 28 ... third pulley, 29a, 29b ... cover member, 31 ... space, 32 ... sealing member, 33 ... dust collecting hose, 35 ... drive motor, 36 ... moving motor 37a ... guide bar, 37b ... support column, 39 ... insertion bracket, 40 ... contact member, 40a ... inferior arc surface member, 40b ... thin plate member, 41 ... fixing member, 42 ... guide shaft, 43 ... mounting member, 44 ... 4th pulley, 45 ... Hanging member, 45a ... Hanging pipe, 47 ... Fixed hinge part, 48 ... Arm part, 49 ... Base part, 50 ... Stand part, 51 ... Offset stand, 51 , 51b ... pipe member, 53 ... offset pulley, 54 ... partition member, 56 ... roller mounting member, 56a ... groove portion, 57 ... roller, 59 ... cover portion, 59a ... opening, 59b, 71 ... hole, 60 ... wire, 70: Reinforced concrete block, 70a: Installation surface.

Claims (10)

A wire drive unit for winding and rotating a wire for cutting a cutting object;
A tension applying unit that applies tension to the wire to press the wire against the object to be cut;
A case member containing the wire driving unit and the tension applying unit;
A pair of stand parts fixed to the main body part holding the case member,
Each of the stand portions includes a hollow offset stand provided with openings on the tip side and the main body side,
In the offset stand, an offset part for winding the wire is attached to the tip,
Each said stand part is attached to the said main-body part so that a relative position with respect to the said main-body part can be changed, The wire saw cutting device characterized by the above-mentioned. In the wire saw cutting device according to claim 1,
The stand part is attached to the main body part via an attachment mechanism,
The attachment mechanism is
A position changing mechanism that enables the mounting position of the base part of the stand part to the main body part to be changed;
A wire saw cutting device comprising: an angle changing mechanism that enables an attachment angle of the stand part to the main body to be changed. In the wire saw cutting device according to claim 1 or 2,
An apparatus for cutting a wire saw, wherein an annular sealing member is provided on a contact surface of the main body with the object to be cut. In the wire saw cutting device according to claim 3,
An apparatus for cutting a wire saw, wherein the main body is provided with exhaust means for exhausting a space surrounded by the seal member. In the wire saw cutting device according to any one of claims 1 to 4,
The wire saw cutting device according to claim 1, wherein the main body portion is configured such that a contact surface side with the cutting object has a shape along a surface shape of the cutting object. In the wire saw cutting device according to any one of claims 1 to 5,
The stand portion includes a cover portion that covers the offset stand in a state where the tip end side of the offset stand is closed,
The wire saw cutting device, wherein the cover portion is provided with an opening for exposing the wire. In the wire saw cutting device according to claim 6,
A wire saw cutting device, wherein a rotatable sliding portion protruding in a direction in contact with a wall surface of a hole into which the stand portion is inserted is attached to the stand portion. In the wire saw cutting device according to any one of claims 1 to 7,
The wire saw cutting device, wherein the tension applying unit includes a plurality of tension feed pulleys movable in an extending direction of the offset stand. In the wire saw cutting device according to any one of claims 1 to 8,
A wire saw cutting device, wherein a tension adjusting unit for winding the wire and adjusting the tension of the wire is provided in the case member. A cutting method for cutting an object to be cut using the wire saw cutting device according to any one of claims 1 to 9,
Two holes are formed in the cutting object at an interval corresponding to the interval between the pair of stand portions,
Insert each stand portion of the wire saw cutting device into each of the holes while changing the relative position of each stand portion with respect to the main body portion of the offset stand, so that the object to be cut is brought into contact with the wire saw cutting device. Install the wire saw cutting device on the cutting object so as to abut,
A cutting method characterized in that the wire wound around the wire saw cutting device cuts the pair of stand portions of the cutting object into a planar shape.