JPH0445849Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a pressing device in a concrete structure cutting device used for cutting walls, floors, etc. of concrete structures to create openings. be.

[Prior art]

Conventionally, as a cutting device with a pressing device for cutting walls of concrete structures, as shown in FIGS. 8 and 9, a trolley 6 placed on a lower slab 5 is
In addition to fixing the two columns 7, a seat 8 is provided which is pressed against the lower floor slab 5 by a lower hydraulic jack for tension fixing. A pressing plate 12 is provided at the upper end to be pressed against the upper floor slab 11 by an upper hydraulic jack 10 for tension fixing, and the wire rope 14 fed out from the hoist 13 fixed to the truck 6 is connected to the connecting member. pulley 15 attached to 9
The guide rollers 17 attached to both the right and left sides of the lifting support member 16 are fitted into the grooves of the vertical guide rails 18 fixed to each support column 7, and the guide rollers 17 are connected to the lifting support member 16. 16 is provided with a rear support member 20 that is pushed forward by a pressing hydraulic jack 19, and an intermediate support member 21 is attached to the rear support member 20 on a horizontal shaft 22.
The front support member 23 is pivotally connected to the intermediate support member 21 by a vertical shaft 24, and the rear support member 20 and the intermediate support member 21 are connected by an angle adjustment turnbuckle 25.
The cutting device 3 connects the intermediate support member 21 and the front support member 23 by an angle adjustment turnbuckle 26, and includes a high-pressure water injection nozzle 27 for cutting, a feed screw 28 for moving the nozzle, and a casing 29.
A structure in which the middle portion of the casing 29 is fixed to the front support member 23 is known.

[Problem that the invention attempts to solve]

However, in the case of the conventional cutting device with a pressing device, in order to bring the front opening of the casing 29 in the cutting device 3 into close contact with the wall 30 of the concrete structure, the rear support member 20 and the cutting device 3 are It is necessary to provide a heavy and complicated angle adjustment support device between the cutting devices 3 and 30, and a complicated angle adjustment operation is required to bring the front opening of the casing 29 into close contact with the wall 30. When moving up and down, it is necessary to move both the heavy angle adjustment support device and the heavy pressing hydraulic jack 19, so there is a problem that a moving device such as a large-capacity hoist is required. be.

[Purpose of the invention, structure]

The purpose of this invention is to provide a pressing device for a concrete structure cutting device that can advantageously solve the above-mentioned problems. A pressing device supporting member 2 is supported by a reaction force supporting member 1 which is fixed in tension therebetween, and a pressing rubber tube 4 connected to a compressed air supply source is connected between the pressing device supporting member 2 and the cutting device 3. A pressing device in a concrete structure cutting device is characterized in that a pressing device is provided in a concrete structure cutting device.

〔Example〕

Next, this invention will be explained in detail using illustrated examples.

1 to 3 show a concrete structure cutting device with a pressing device having a pressing device according to a first embodiment of the present invention, in which the lower end of a reaction force supporting member 1 consisting of a column with a circular cross section is shown. A seat 31 is attached to the lower floor slab 5 of the concrete structure, and a cylinder of a hydraulic jack 32 for tension fixing operated by a hand pump is attached to the upper end of the reaction force support member 1. is fixed, and the upper floor slab 1 is mounted on the piston rod of the hydraulic jack 32.
A pressing device support member 2 is fitted to the intermediate portion of the reaction force supporting member 1 so as to be slidable and rotatable, and is fixed to the pressing device supporting member 2. The female screw member 33 has a fixing bolt 3 that is crimped onto the reaction force support member 1.
4 are screwed together.

A connecting pin 36 is removably inserted and inserted between the support ring 35 fitted to the reaction force support member 1 at the upper part of the pressing device support member 2 and the reaction force support member 1, and the reaction force support member 1 A vertical cylindrical body 37 rotatably fitted in the vertical cylindrical body 37 is placed on the support ring 35, and a horizontal support tube 38 has a base end fixed to the vertical cylindrical body 37, and a movable tube 38 is fixed to the vertical cylindrical body 37. A support member 39 is slidably fitted into the vertical cylinder 37, the horizontal support tube 38 and the movable support member 3.
9 constitutes a rotating telescopic support member 40.

The main body of a level adjustment hoist 42 consisting of a winch or a lever-swinging lifting device (trade name: Lever Block) is suspended from a support fitting 41 fixed to the tip of the movable support member 39, and the hoisting device 42 is Machine 4
A locking fitting 45 fixed to the upper center of the casing 44 of the cutting device 3 is connected to the hanging end of a strip 43 such as a chain or rope hanging from the casing 2. A pressing rubber tube 4 made of a sealed rubber bellows tube is provided between the front surface of the pressing device support member 2 and the front surface of the pressing device support member 2.
is interposed, and the front end plate of the rubber tube 4 is fixed to the rear surface of the casing 44 at the center in the left-right direction with an adhesive or the like, and the pressing device supporting member is inserted into the recess 46 provided in the rear end plate of the rubber tube 4. A pin 47 fixed to 2 is fitted and fixed.

The compressed air supply source consisting of the compressor 48 and the pressing rubber tube 4 are connected to the supply/exhaust hose 49.
The hose 49 is connected with an on-off exhaust switching valve 50, and when the compressor 48 is operated with the on-off exhaust switching valve 50 open, compressed air is supplied into the pressing rubber tube 4, and the on-off exhaust switching valve 50 is connected. When the valve 50 is closed, the supply of compressed air into the pressing rubber tube 4 is stopped, and when the open/close exhaust switching valve 50 is switched to the exhaust state, the compressed air inside the pressing rubber tube 4 is released and the pressing rubber tube 4 is closed. atmospheric pressure inside.

Note that the pressing device support member 2 and the pressing rubber tube 4 may be fixed with an adhesive, or the pressing rubber tube 4 and the pressing device supporting member 2 or the casing 44 may be detachably fixed by an appropriate means. good.

To explain the structure of the cutting device 3, a nozzle moving feed screw 28 rotated by a drive device (not shown) is arranged so as to extend in the left-right direction within the casing 44 and is rotatably supported by a bearing. The feed screw 2 for moving the nozzle
A guide member 51 parallel to 8 is fixed to the casing 44, a nozzle holder 52 is screwed to the nozzle moving feed screw 28 and slidably fitted to the guide member 51, and the nozzle holder 52 includes: A cutting high-pressure water injection nozzle 27 that injects high-pressure water toward the front is fixed to the casing 4.
The front of the nozzle moving part 4 is open, and a rubber sealing material 53 is fixed to the front opening of the casing 44 with an adhesive or the like. Further, rubber band-shaped sealing plates 54 are fixed to the upper and lower parts of the nozzle moving slit in the casing 44 with adhesive, and rubber band-shaped sealing plates 55 are fixed to the upper and lower parts of the nozzle holder moving slit in the casing 44 with adhesive. It is fixed by etc.

FIGS. 4 and 5 show a back guard device with a pressing device installed on the back side of the part to be cut in a wall, in which a box-shaped guard frame 56 extending in the left and right direction and having an open front part attracts suction. connected to a suction pump 58 via a hose 57;
A protective plate 59 made of ceramic is provided in the inner part of the box-shaped guard frame 56, and a rubber sealing material 53 is fixed to the opening of the box-shaped guard frame 56 with an adhesive or the like. A pressing rubber tube 4 is provided between the rear surface of the central portion in the left and right direction in 58 and the pressing device support member 2.
is interposed therebetween, but the rest of the configuration is the same as that of the concrete structure cutting device having the pressing device according to the first embodiment except for the cutting device 3.

When cutting a wall 30 in a concrete structure using the concrete structure cutting device having the pressing device of the first embodiment and the back guard device with pressing device shown in FIGS.
As shown in the figure, with the seat 31 placed on the lower floor slab 5, the pressure plate 12 is pressed against the upper floor slab 11 by the tension fixing hydraulic jack 32, and the reaction force support member 1 is placed on the lower floor slab 5. The cutting device 3 is fixed to the floor slab 5 and the upper floor slab 11, and the level of the cutting device 3 is adjusted by the level adjusting hoist 42, and with the pressing rubber tube 4 held horizontally, the pressing device is removed by the fixing bolt 34. By fixing the support member 2 to the reaction force support member 1 and then supplying compressed air into the pressing rubber tube 4 to expand the pressing rubber tube 4, the rubber sealing material 53 in the cutting device 3 is attached to the wall 30. adhere to the surface of the

In addition, the reaction force support member 1 in the back guard device with a pressing device shown in FIGS. Adjust the box-shaped guard frame 56 using the upper machine 42 so that it is at the same level as the cutting high-pressure water injection nozzle 27, and
With the pressing rubber tube 4 in a horizontal state, compressed air is supplied into the pressing rubber tube 4,
By extending the pressing rubber tube 4, the rubber sealing material 5 of the box-shaped guard frame 56 is
3 to the back side of the wall 30.

Next, the nozzle moving feed screw 28 is rotated to remove the nozzle holder 52 and the high pressure water injection nozzle 27 for cutting.
By injecting high pressure water from the high pressure water injection nozzle 27 while moving the wall 30, the wall 30 is cut in the horizontal direction. In this case, water and cutting debris that have entered the box-shaped guard frame 56 are removed by the suction hose 5
7 and is sucked by a suction pump 58.

FIG. 7 shows a cutting device with a pressing device according to a second embodiment of the present invention, in which the horizontal support tube 3 in the rotating telescopic support member 40 is shown.
The pressing device support member 2 is slidably fitted to the
A supporting leg 61 having a rubber seat plate 60 is attached to the casing 44 of the cutting device 3 which is arranged downward.
is fixed, and the pressing rubber tube 4 is interposed vertically between the pressing device support member 2 and the casing 44 of the cutting device 3, but the other structure has the pressing device according to the first embodiment. This is the same as in the case of a cutting device with a pressing device.

[Effect of idea]

According to this invention, the pressing device supporting member 2 is supported by the reaction force supporting member 1 which is tension-fixed between the upper and lower deck slabs of a concrete structure, and the pressing device supporting member 2 is connected between the pressing device supporting member 2 and the cutting device 3. Since the pressing rubber tube 4 connected to the compressed air supply source is interposed, compressed air is simply supplied from the compressed air supply source into the pressing rubber tube 4, and the pressing rubber tube 4 is expanded by air pressure. By doing so, the periphery of the front opening of the cutting device 3 can be automatically brought into close contact with the surface of the part to be cut, such as a wall or floor slab in a concrete structure, and therefore the pressing supported by the reaction force support member 1 Since it is not necessary to provide a heavy hydraulic pressure jack for pressing and a heavy and complicated angle adjustment support device between the device support member 2 and the casing 44 of the cutting device 3, the cutting device 3 can be attached to the part to be cut. The structure of the pressing device that presses the cutting device is simple and can be manufactured to be lightweight.Furthermore, since the pressing device is lightweight, the cutting device with the pressing device can be lightened and easily moved. can get.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of this invention, in which FIG. 1 is a perspective view of a concrete structure cutting device with a pressing device, and FIG. 2 is a vertical side view showing a part thereof. , FIG. 3 is an enlarged longitudinal sectional side view of a part of FIG. 2. Fig. 4 is a perspective view showing a back guard device with a pressing device, Fig. 5 is a longitudinal side view of the back guard device, and Fig. 6 is a longitudinal side view showing a state in which the cutting device and the back guard device are brought into close contact with both the front and back sides of a wall. It is. FIG. 7 is a side view of a concrete structure cutting device having a pressing device according to a second embodiment of the invention. FIG. 8 is a partially cutaway perspective view of a conventional concrete structure cutting device having a pressing device, and FIG. 9 is an enlarged perspective view of a portion of FIG. In the figure, 1 is a reaction force support member, 2 is a pressing device support member, 3 is a cutting device, 4 is a rubber tube for pressing, 5 is a lower slab, 11 is an upper slab, 12 is a pressing plate, and 27 is a high pressure for cutting. Water injection nozzle, 28 is a feed screw for moving the nozzle, 30 is a wall, 31 is a seat, 32
34 is a tension fixing hydraulic jack, 34 is a fixing bolt, 35 is a support ring, 36 is a connecting pin, 37 is a vertical cylinder, 38 is a horizontal support tube, 39 is a movable support member, 40 is a rotating telescopic support member, 42 is a hoisting machine for level adjustment, 43 is a strip, 44 is a casing, 46
is a recess, 47 is a pin, 48 is a compressor, 49
50 is a supply/exhaust hose, 50 is an on/off exhaust switching valve, 51 is
52 is a guide member, 52 is a nozzle holder, 53 is a rubber sealing material, and 54 and 55 are rubber band-shaped sealing plates.

Claims (1)

[Scope of utility model registration request] A pressing device supporting member 2 is supported by a reaction force supporting member 1 which is tension-fixed between the upper and lower deck slabs of a concrete structure, and a compressed air supply source is provided between the pressing device supporting member 2 and the cutting device 3. A pressing device for a concrete structure cutting device, characterized in that a pressing rubber tube 4 connected to a pressing rubber tube 4 is interposed.