JP3894910B2 - Method and apparatus for cutting reinforced concrete structures, etc. - Google Patents

Description

  The present invention relates to a method and an apparatus for cutting a structure such as concrete, reinforced concrete, or brick or concrete block (hereinafter simply referred to as “reinforced concrete structure”) by wire sawing.

  FIG. 1 shows a cutting device using wire sawing. A mounting base 2 that is detachably fixed to a reinforced concrete structure 1 or the like by an anchor bolt or the like, and a rack 3 that is projected from the mounting base 2 are attached. The main pole 4, the main pulley 5 that is rotationally driven by a motor, and the pinion that meshes with the rack 3 and rolls. A guide bar 7 fixed orthogonally, a plurality of guide pulleys 8 a, 8 b, 8 c, 8 d that are detachably fixed to the guide bar 7 and are located on the same plane, a reinforced concrete structure 1, and the like It consists of a diamond wire 9 spanned between the pulley 5 via guide pulleys 8a, 8b, 8c, 8d, At the time of cutting, the main pulley 5 is rotationally driven to pull the diamond wire 9 hung on the reinforced concrete structure 1 and the like, so that the self-propelled base 6 is moved backward while the reinforced concrete structure 1 is wire sawed so that the cutting progresses. The slack of the wire 9 that occurs with this is absorbed.

At the time of such wire sawing, conventionally, as shown in FIG. 1, cutting is performed while water is supplied as shown in a place where the diamond wire 9 on the entry side and the exit side are in contact with the reinforced concrete structure 1 or the like.
Japanese Unexamined Patent Publication No. 64-14473

  Water supply for cutting requires a large amount of water, and if there is no tap water facility, it is necessary to carry a large amount of water. There are problems such as that it takes time and labor, and that it is necessary to perform a curing operation such as covering with a sheet so that the supplied water is not scattered around.

  The present invention has been made for the purpose of solving the above problems, and an object of the present invention is to provide a method and an apparatus for performing wire sawing without applying water to a reinforced concrete structure or the like.

According to a first aspect of the present invention, there is provided a method of cutting a reinforced concrete structure or the like cut by a cutting cable by circulatingly driving a cutting cable laid over the reinforced concrete structure or the like. After the dust discharged from the cut end where the cutting cable exits from the reinforced concrete structure, etc., is sucked and removed by vacuum means in a state where it is covered and sealed with a liquid, the liquid cable is applied to the cutting cable at a location that does not contact the reinforced concrete structure. It is characterized in that it is cooled by spraying vaporized gas such as or by spraying cooling water by mist means, etc.,
The invention according to claim 2 relates to an apparatus for carrying out the above method, and a mounting base that is detachably fixed to a reinforced concrete structure or the like, and a main projecting from the mounting base and provided with a rack. A self-propelled base that has a pole, a motor, a main pulley that is rotationally driven by the motor, and a pinion that meshes with the rack, is movably mounted on the main pole, and moves along the main pole by the rotational drive of the pinion And a plurality of guide pulleys supported or attached to the main pole and / or reinforced concrete structure, etc., and a cutting cable spanned between the main pulley and the reinforced concrete structure via the guide pulley In structures and other cutting devices, such as reinforced concrete structures that are cut by cutting cables Ri and sealing means for sealing over the mouth, and the vacuum means for dust suction removal cutting cable is released from the incision locations exiting from reinforced concrete structures, etc., by the vacuum means at a location not in contact with the reinforced concrete structures, etc. It is characterized by comprising means for injecting vaporized gas such as liquid nitrogen to the cutting cable from which dust has been removed, or mist means for spraying cooling water.

  As the cutting cable used in each of the above inventions, diamond wire is usually used as in the conventional cable.

  The sealing means is not particularly limited as long as it covers the cut surface so that dust does not come out. Examples of such materials include metal, resin, rubber, and the like, and sheets of resin, rubber, cloth, etc., among others, materials that are easily adapted to the shape of reinforced concrete structures, such as sponge and rubber. Etc. are desirable.

The vacuum means may be any device that generates a vacuum, and is not particularly limited. One of these is the vacuum cleaner (industrial vacuum cleaner).
An example of the mist means is a nozzle.

The invention according to claim 3 is the invention according to claim 2, wherein the sealing means is a cover made of a material capable of driving a wedge .

  According to the present invention, the cut end of the reinforced concrete structure or the like is sealed by the sealing means, so that dust generated at the time of cutting can be prevented from being released to the outside, and from the cut end where the cutting cable comes out as the cutting cable runs. The discharged dust is sucked and removed by the vacuum means, and the cutting cable is cooled by the vaporized gas such as the injected liquid nitrogen or the cooling water sprayed from the mist means, but even when using the cooling water, Since this cooling water is sprayed in a sprayed state, there is little or no sludge water, so it is environmentally friendly, environmental pollution can be reduced, a small amount of water is supplied, water treatment is unnecessary, sludge water It is possible to eliminate the need for curing work to prevent splashing, and to prevent troubles caused by sludge water, etc. That decreases an effect equal.

In addition, if a cover made of a material that can drive a wedge into the sealing means is used, a wedge is driven into the cut in order to prevent the cut from narrowing due to its own weight such as a reinforced concrete structure. You can also drive the wedge through the cover without removing the cover.

  FIG. 2 is a schematic diagram of a cutting apparatus according to the present invention. A diamond wire 9 as a cutting cable is stretched between a reinforced concrete structure 1 and a main pulley 5 and a guide pulley 8e is provided on the wire exit side. The guide pulley 8f is detachably secured to the reinforced concrete structure 1 etc. on the wire entry side, and a vacuum cleaner (not shown) is connected to the hood 11 covered by the guide pulley 8e via the duct 12. Dust discharged from the cut end is confined in the hood 11 and is sucked and collected by a vacuum cleaner.

  In the figure, 13 is a nozzle as means for cooling the diamond wire 9 by jetting gas or spraying cooling water on the diamond wire 9, and 14 is a cover as sealing means for covering the cut surface of the reinforced concrete structure 1 or the like. . FIG. 3 shows an example of the cover 14, which is made of a long sponge having a concave cross section and is bonded to the reinforced concrete structure 1 or the like 1 so as to cover the diamond wire 9 with the double-sided adhesive tape 15.

  FIG. 4 is made of a band-like sponge, and is bonded to the reinforced concrete structure 1 or the like 1 so that the whole is curved and the double-sided adhesive tape 15 covers the diamond wire 9.

  FIG. 5 shows a state in which a wedge 17 is driven into the cut 16 through the cover 14 in order to prevent the cut 16 of the reinforced concrete structure 1 and the like from being narrowed by the weight of the reinforced concrete structure 1 and the like. is there.

The front view of the conventional cutting device. The schematic diagram of the cutting device concerning this invention. Sectional drawing which shows an example of a cover. Sectional drawing which shows another example of a cover. Sectional drawing which shows the state which driven the wedge into the cut end.

Explanation of symbols

1. Reinforced concrete structures, etc. 2. Mounting base 3, Rack 4, Main pole 5, Main pulley 6, Self-propelled base 7, Guide bars 8a, 8b, 8c, 8d, 8e, 8f Guide pulley 9 · Diamond wire 11 · Hood 12 · Duct 13 · Nozzle 14 · Cover 15 · Double-sided adhesive tape 16 · Cut 17 · · Wedge

Claims (3)

In a method of cutting a reinforced concrete structure or the like by circulating a cutting cable laid over a reinforced concrete structure or the like and cutting the reinforced concrete structure or the like cut by the cutting cable with a sealing means, the cutting is performed. After the dust discharged from the cut end where the cable for the reinforced concrete structure comes out is sucked and removed by vacuum means, the cooling medium is sprayed or sprayed on the cutting cable at the place where it does not come into contact with the reinforced concrete structure etc. to cool it A method for cutting a reinforced concrete structure or the like. A mounting base that is detachably fixed to a reinforced concrete structure, etc., a main pole that protrudes from the mounting base and has a rack attached thereto, a motor, a main pulley that is rotationally driven by the motor, and the rack. A self-propelled base that has a pinion, is movably mounted on the main pole, and moves along the main pole by the rotation of the pinion, and a plurality of guides supported or attached to the main pole and / or reinforced concrete structure, etc. In a cutting device such as a reinforced concrete structure comprising a pulley and a cutting cable that is passed between a main pulley and a reinforced concrete structure via a guide pulley, the reinforced concrete structure that is cut by the cutting cable The sealing means that covers and cuts the cut end and the cutting cable Vacuum means and, means for injecting or spraying a cooling medium to the cutting cable removal of dust by the vacuum means at a location not in contact with the reinforced concrete structures, etc. for sucking and removing dust released from the incision locations exiting from structures such as A cutting device for a reinforced concrete structure or the like. 3. A cutting apparatus for a reinforced concrete structure or the like according to claim 2, wherein the sealing means is a cover made of a soft material into which a wedge can be driven .

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