JP4199524B2 - Cutting equipment for reinforced concrete structures - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a cutting apparatus for cutting a structure such as concrete, reinforced concrete, brick, concrete block, or metal (hereinafter simply referred to as “reinforced concrete structure”) by wire sawing.
[0002]
[Prior art]
[Patent Document 1]
FIG. 1 shows a conventional cutting apparatus disclosed in Japanese Patent Application Laid-Open No. 7-158290. The mounting base is detachably fixed to a reinforced concrete structure 1 using an anchor bolt or the like. 2, a main pole 3 protruding from the mounting base 2 and provided with a rack, a diamond wire driving main pulley 4 that is driven to rotate by a motor, and a pinion that meshes with the rack. A self-propelled base 5 that is movably mounted, a guide bar 6 that is fixed orthogonally to the main pole 3, and a plurality of guide pulleys that are detachably secured to the guide bar 6 and are located on the same plane. 7a, 7b, and 7c, and a diamond wall that is spanned between the reinforced concrete structure 1 and the main pulley 3 via the guide pulleys 7a, 7b, and 7c. More becomes yer 8, the main pulley 3 driven to rotate by driving a diamond wire 8, the reinforced concrete structures such as 1 is adapted to perform cutting retract the self base 5 while sawing.
[0003]
[Problems to be solved by the invention]
When cutting by wire sawing, it is necessary to arrange the guide pulley as close as possible to the cut surface of the reinforced concrete structure in order to stabilize the movement of the diamond wire and increase the cutting accuracy. For example, as shown in FIG. When cutting a cylindrical reinforced concrete structure or the like 1 sideways, when simultaneously cutting the floor 9 and the wall 10 as shown in FIG. 3, or when cutting the stairs 11 as shown in FIG. The guide pulley 7c and the cut end e are separated from each other, and the movement of the diamond wire during wire sawing becomes unstable. Therefore, in the case described above, conventionally, as shown by the one-dot chain line in FIGS. 2 to 4, when the auxiliary pulley 7d is used to attach to the reinforced concrete structure 1 near the cut or to cut the floor and the wall, When the auxiliary pulley 7d is used, when the auxiliary pulley 7d is attached to the reinforced concrete structure 1, the wall 9, the stairs 11, etc., the other guide pulleys 7a, 7b , 7c is required to be aligned on the same plane. In addition, when the floor and the wall are cut separately, two cutting operations are necessary, and each time they must be fixed to and removed from the reinforced concrete structure.
[0004]
As shown in FIG. 5, when a reinforced concrete structure or the like 12 bent inward, such as a large-diameter fume tube or chimney, is cut from the inside, the guide pulley 7 c interferes with the reinforced concrete structure or the like 12. . In this case, it is necessary to remove the guide pulley 7c or use a short guide bar and attach an auxiliary pulley near the cut end. However, when using the auxiliary pulley, alignment is required as described above. Become.
[0005]
An object of this invention is to provide the cutting device by the wire saw which solved the above-mentioned problem.
[0006]
[Means for solving problems]
The invention according to claim 1 is a mounting base that is detachably secured to a reinforced concrete structure, a main pole that protrudes from the mounting base and is provided with a rack, and a cutting cable that is rotationally driven by a motor. has a pinion which meshes with the main pulley and the rack drive, is movably attached to the main pole, and a free-running stage that moves along the main pole by the rotation of the pinion relative to the main pole Cartesian or Between a guide bar that is mounted to cross at an appropriate angle, a plurality of guide pulleys that are coplanar with the guide bar, and that are aligned with each other and fixed, and between the reinforced concrete structure and the main pulley A cutting device comprising a cutting cable laid over the guide pulley, wherein the guide bar is hinged at least in one place More above the plane, or refracted possible in this plane and parallel to the plane, configured to be fixed by a fixing means is refracted at an arbitrary angle, each guide pulley Ru is fastened on both sides of the guide bar of the hinge It is characterized by that.
[0007]
According to the present invention, by refracting the guide bar, the guide pulley can be moved closer to the cut surface or separated from the reinforced concrete structure or the like so as not to interfere with the guide pulley. In the same plane or in a plane parallel to the plane, it is not necessary to align the core even if the guide bar is refracted if it is aligned in advance.
[0008]
A typical example of the cutting cable used in the present invention is diamond wire.
The fixing means includes, for example, a bolt that constitutes a hinge and a nut that is screwed into the projecting end of the bolt and is fastened to the free end side of the guide bar so as to be rotatable, and a reinforced concrete structure. The leg etc. which can be detachably fixed to can be illustrated.
[0009]
In the case of the former bolt and nut, the guide bar can be tilted and fixed easily by simply loosening or tightening the nut, but the free end of the guide bar is cantilevered. However, when the wire is sawed, it tends to swing with the guide pulley, and the movement of the cutting cable becomes unstable and the cutting accuracy decreases. Since the free end is supported by the legs, it is difficult for shaking to occur, and the movement of the cutting cable during wire sawing is stabilized.
[0010]
Accordingly, the invention according to claim 2 is the invention according to claim 1, wherein the fixing means comprises a leg pivotally supported on the free end side of the guide bar and removably fastened to the reinforced concrete structure or the like. It is characterized by that.
[0011]
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the auxiliary pole is supported by the guide bar in a plane in which the guide bar is refracted, and preferably supported so as to be position-adjustable along the guide bar, It is characterized by comprising a guide pulley fixed to the auxiliary pole so that the position can be adjusted.
According to the present invention, the slack of the cutting cable can be absorbed by adjusting the position of the guide pulley fixed to the auxiliary pole.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 6 shows a cutting apparatus according to the present invention, a mounting base 21 that is detachably fixed to a reinforced concrete structure 1 or the like by an anchor bolt (not shown), and is erected from the mounting base 21. It has a main pole 22 provided with a rack (not shown), a diamond wire driving main pulley 23 as a cutting cable rotated by a motor (not shown), and a pinion (not shown) meshing with the rack. The main pole 22 is movably mounted, and includes a self-propelled base 24 that moves up and down along the main pole 22 by rotation of the pinion, and a guide bar 25 that is attached orthogonally to the main pole 22. The bar 25 can be turned up and down by a short bar 25a attached to the main pole 22 and a hinge 26 on the short bar 25a. Consists of a long bar 25b to be supported, the main pole on both sides of the short bars 25a to the guide pulley 27a, 27b is also on both sides of the long bar 25b guide pulley 27c, 27d are positioned adjustably fastened.
[0013]
An auxiliary pole 28 is also attached to the long bar 25b so that the position of the auxiliary pole 28 can be adjusted perpendicularly to the long bar 25b. A leg 31 is rotatably connected to the lower end of the long bar 25b by a hinge 29, and a fixed base 32 is attached to the end of the leg. It is fixed to the reinforced concrete structure 1 by a bolt (not shown) so as to be removable. A guide pulley 27e is also fixed to the auxiliary pole 28 so that the position can be adjusted.
[0014]
When cutting a columnar or cylindrical reinforced concrete structure or the like, as shown in FIG. 7, the mounting base 21 is fixed to the reinforced concrete structure or the like 34 sideways with anchor bolts, and then a long bar 25b is illustrated. The legs 31 are bent and fixed to a reinforced concrete structure or the like 34 with bolts. Next, the diamond wire 35 hung on the reinforced concrete structure 34 is hung on the main pulley 23 via the guide pulley 27a, and further hung on the guide pulley 27b, the guide pulley 27e, and the guide pulley 27d in this order to adjust the position of the guide pulley 27e. Then, the slack of the diamond wire 35 is absorbed. After that, as usual, the main pulley 23 is rotationally driven to run the diamond wire 35, and the self-running base 24 is moved backward while cutting the reinforced concrete structure 34 and the like to perform cutting.
[0015]
FIG. 8 shows an example of cutting the stairs 37. The mounting base 21 is placed on the stairs 37, and then the long bar 25b is tilted to follow the inclination of the stairs 37, and the legs 31 are fixed to the stairs 37. Then, after the diamond wire 35 is hung as shown in the figure, wire sawing is performed.
[0016]
FIG. 9 shows an example in which a fume pipe 38 as a reinforced concrete structure or the like is cut from the inner side by a predetermined length in the circumferential direction. After the mounting base 21 is attached to the inner face of the fume pipe, the legs 31 are attached. Wire sawing with diamond wire.
[0017]
【The invention's effect】
According to the first aspect of the present invention, when cutting a columnar or cylindrical reinforced concrete structure or the like, when cutting a staircase, or simultaneously cutting a floor or a wall, the centering is performed in advance by simply refracting the guide bar. Wire sawing can be performed by bringing the guide pulley close to the cut end, and the auxiliary pulley does not need to be aligned as in the case where an auxiliary pulley is separately installed near the cut end, making it easy to perform cutting work. Moreover, since the guide pulley is brought close to the cut end, the movement of the cutting cable during wire sawing is stabilized, and the cutting accuracy when cutting a reinforced concrete structure or the like is improved.
[0018]
According to the second aspect of the present invention, since the free end side of the guide bar is supported by the legs, the guide bar is not shaken or the guide pulley is not shaken at the time of wire sawing. Therefore, cutting when cutting a reinforced concrete structure or the like. Cable movement is more stable and cutting accuracy is improved.
[0019]
According to the third aspect of the present invention, the slack of the cutting cable can be absorbed by adjusting the position of the guide pulley.
[Brief description of the drawings]
FIG. 1 is a front view of a conventional cutting apparatus.
FIG. 2 is a schematic view showing an aspect when a column or a columnar reinforced concrete structure or the like is cut using the cutting apparatus shown in FIG. 1;
FIG. 3 is a schematic view showing an aspect when a floor and a wall are simultaneously cut using the cutting device shown in FIG. 1;
FIG. 4 is a schematic view showing an aspect when a stair is cut using the cutting device shown in FIG. 1;
5 is a schematic view showing an aspect when cutting a reinforced concrete structure or the like bent inward using the cutting device shown in FIG.
FIG. 6 is a front view of a cutting device according to the present invention.
7 is a front view showing an aspect when a column or a columnar reinforced concrete structure or the like is cut using the cutting device shown in FIG. 6;
FIG. 8 is a schematic view showing an aspect when cutting a staircase using the cutting device shown in FIG. 6;
9 is a schematic view showing an aspect when a fume tube is cut from the inside using the cutting device shown in FIG. 6;
[Explanation of symbols]
1, 12, 34 .. Reinforced concrete structures, etc. 2, 21 .. Mounting bases 3, 22 .. Main poles 4, 23 .. Main pulleys 5, 24 .. Self-propelled bases 6, 25 .. Guide bar 25a. Short bar 25b ··· Long bars 7a, 7b, 7c, 27a, 27b, 27c, 27d, 27e · · Guide pulley 7d · · Auxiliary pulley 9 · · Floor 10 · · Wall 11, 37 · · Stair 28 · · Auxiliary pole 26, 29 ·· Hinge 31 · · Leg 32 · · Base 8, 35 · · Diamond wire 38 · · Hume tube

Claims (3)

A mounting base that is detachably secured to a reinforced concrete structure, a main pole that protrudes from the mounting base and is attached to a rack, a main pulley for driving a cutting cable that is driven to rotate by a motor, and the rack has a pinion meshing with, is movably attached to the main pole, and a free-running stage that moves along the main pole by the rotation of the pinion relative to the main pole intersect at Cartesian or a suitable angle A guide bar to be mounted, a plurality of guide pulleys that are positioned on the same plane and fixed to each other by being aligned with each other, and a reinforced concrete structure or the like and the main pulley are hung through the guide pulley. A cutting device comprising a passed cutting cable, wherein the guide bar is hinged at least in one place in the plane, There is a possible refraction in the plane parallel to the flat surface, is fixable by a fixing means is refracted at an arbitrary angle, and each guide pulley to the hinge on both sides of the guide bar is secured and wherein Rukoto Cutting equipment for reinforced concrete structures. 2. The cutting of a reinforced concrete structure or the like according to claim 1, wherein the fixing means comprises a leg pivotally supported on the free end side of the guide bar and detachably secured to the reinforced concrete structure or the like. apparatus. The reinforced concrete structure according to claim 1 or 2, comprising: an auxiliary pole supported by the guide bar in a plane where the guide bar is refracted, and a guide pulley fixed to the auxiliary pole so that the position of the auxiliary bar can be adjusted. Cutting device.

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