JPH05171820A - Overhauling device for concrete wall - Google Patents

Abstract

PURPOSE:To cut a concrete wall with excellent operating efficiency in the two vertical and horizontal directions by turning a cutter installed on the sidewall of a main body bridged to the concrete wall in a vertical surface by a rolling mechanism. CONSTITUTION:The main body 16 of a U-shaped sectional overhauling device 15 is hung down from the upper section of a concrete wall 20 to the concrete wall 20 to be cut and bridged. The main body 16 is fixed to the concrete wall 20 by a fixing device composed of hydraulic cylinders 18, 18. A cutter 17 with a blade 23 is mounted onto the sidewall 16a of the main body 16. A rolling mechanism A consisting of a turntable 12, a motor 13 for drive and a worm 14 is set up between the main body 16 and the cutter 17, and the cutter 17 is brought to a rotatable state in a vertical surface. The rolling mechanism A is rotated in the two vertical and horizontal directions in response to requirement, and the concrete wall 20 is cut by the cutter 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for disassembling concrete walls in nuclear facilities and other general structures.

[0002]

2. Description of the Related Art Conventionally, when dismantling a cylindrical concrete wall in a nuclear facility for reasons such as decommissioning,
In consideration of the danger of radioactivity on the human body, the cutting device is operated by remote control. This will be described with reference to FIGS. 3 to 4. In the cutting device 1, a main body 2 of the cutting device 1 is provided with a plurality of retractable fixing legs 3, 4, and 5, and a cutting support arm 6 is rotated above the main body 2. It is freely supported. A blade 7 rotated by a motor is attached to the tip 6a of the support arm 6.

A plurality of hooks 8, 9 and 10 are provided on the upper surface of the main body 2, and the ends of the wires 11 of a crane (not shown) are hooked on the hooks 8 and 9 to cut the cutting device 1.
It is used to lift up.

In order to use the cutting device 1, as shown in FIG. 4, the cutting device 1 is lowered from a central upper portion of a cylindrical concrete wall to be cut to a predetermined height position by a crane,
The fixing legs 3, 4, and 5 are extended by remote control and fixed in position in the concrete wall.

Then, the support arm 6 is remotely operated.
The supporting arm 6 is gradually extended to the inner wall surface of the concrete while rotating the blade 7 of FIG. When the blade 7 reaches a predetermined depth of cut in the concrete wall, the supporting arm 6 is slowly rotated around the main body 2 in a certain direction or moved vertically to cut the concrete wall. Then, the concrete block cut by a gripping device separate from the cutting device 1 is taken out to the outside.

[0006]

However, in the concrete wall cutting method using the above-mentioned cutting device, when the diameter of the cylindrical concrete wall becomes large, the cutting device 1 must also become large. In addition, there is a drawback that a device for collecting cut concrete blocks must be prepared separately.

The present invention has been made in view of the above-mentioned problems, and the size of the cutting device is constant regardless of the size of the concrete wall to be cut, and the cut concrete block is further added to the cutting device. The object is to provide a concrete wall dismantling device that can be collected by recovery.

[0008]

The gist of the present invention to solve the above-mentioned problems and achieve the above-mentioned objects is to provide a main body having a U-shaped cross-section suspended from above the concrete wall to be cut. A cutting device provided with a blade for cutting the concrete wall provided on the side wall of the main body, a rotating mechanism interposed between the main body and the cutting device for rotating the cutting device in a vertical plane, It consists of a fixing means provided on the side wall and for fixing the main body to the concrete wall.

[0009]

According to the dismantling device of the present invention, even if the concrete wall to be cut has a large cylindrical shape, the dismantling device can be made compact because it can be laid across the concrete wall, and the cutting device can be rotated by the rotating mechanism. It can be freely made and can cut concrete in two directions, vertical and horizontal. Then, since the main body of the dismantling device can be fixed to the concrete wall to be cut by the fixing means, the concrete block that has been cut and separated can be collected by the dismantling device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. 1 and 2 are perspective views showing an embodiment according to the present invention. In the figure, reference numeral 12 is a turntable of the rotating mechanism A, 13 is also a drive motor, 14 is also a worm, 15 is a disassembly device, 16 is a disassembly device body, 17 is a cutting device, 18 is a hydraulic cylinder, and 19 is a concrete block. , 20 is a concrete wall, 21 is an engaging portion, 22
Is a wire of a crane, 23 is a blade, 24 is a drive motor, 25 is a cutting line, and 26 is a blade drive motor.

Referring to FIG. 2, the disassembling device 15 has a main body 16 having a U-shaped cross section, which is suspended from above the concrete wall 20 to be cut and hangs from above, and a side wall of the main body 16. A cutting device 17 provided with a blade 23 for cutting the concrete wall 20, a rotating mechanism A interposed between the main body 16 and the cutting device 17 for rotating the cutting device 17 in a vertical plane, and the main body. Hydraulic cylinders 18, 18 which are fixing means for fixing the main body 16 to the concrete wall 20 and are provided on the side wall of the main body 16, and a suspension engaging portion 21 provided on the upper portion of the main body 16. There is.

The cutting device 17 is constructed by vertically mounting a guide shaft 27 and a ball screw 28 in parallel with each other on a casing 17a whose both side surfaces are opened. The ball screw 28 is normally and reversely rotated by the drive motor 24. A movable casing 17b is provided slidably on the guide shaft 27 and the ball screw 28.

The movable casing 17b is movable in the vertical direction in FIG. 1 and in the lateral direction in FIG. 2 by the rotation of the drive motor 24 of the casing 17a.

Further, a guide shaft 27 is attached to the movable casing 17b.
a and a ball screw 28a are erected, and a moving casing 29
Is provided. This movable casing 29 is also movable in the front-rear direction in FIG. 1 or 2 by the rotation of the drive motor 24a in the same manner as described above.

A cutting blade 23 is rotatably provided at one end of the movable casing 29. The blade driving motor 26 rotates the blade 23.
Is.

Thus, in FIG. 1, the blade 23 approaches the concrete wall 20 to be cut and vertically cuts by moving the moving housing 17b and the moving housing 29 in the vertical and front-back directions. , And can be separated after cutting. Further, in FIG. 2, by moving the movable casing 17b and the movable casing 29 in the left-right and front-rear directions, the concrete wall 20 to be cut is approached, cut in the left-right direction, and separated after cutting. ing.

On the upper surface of the main body 16, there are four engaging portions 21.
It is attached to the place. The engaging portion 21 is a U-shaped metal fitting fixed. The engaging portion 21 suspends the wire 22 of a crane (not shown).

On one side wall 16b of the main body 16, hydraulic cylinders 18, 18 are provided, which is the main body 1
By extending the rod of the hydraulic cylinder 18 to press the side wall 16a of the other side 6 to one side, the concrete wall 20
It is fixed to.

The rotating mechanism A comprises a turntable 12 fixed to the cutting device 17, a drive motor 13 for rotational driving, and a worm 14 provided coaxially with the motor 13.

The rotation of the motor 13 causes the worm 1
4 rotates, the outer peripheral teeth of the turntable 12 meshed with this rotate, and the cutting device 17 rotates clockwise or counterclockwise within the vertical plane as the turntable 12 rotates. ..

A flange 16c protruding in the left-right direction is provided on the upper portion of the main body 16 of the disassembling device 15, and ball screws 30, 31 are vertically inserted into both ends of the flange 16c.

The ball screws 30 and 31 that are screwed in are movable in the vertical direction with respect to the flange 16c of the main body 16 by the rotational driving of a motor 32 provided at the upper end thereof. On the other hand, a sandwiching portion 33 having a U-shaped cross section is provided at the lower ends of the ball screws 30 and 31. The side walls of the holding portion 33 are hydraulic cylinders 18a, 1a for holding the concrete wall 20 in a holding action.
8b is provided.

As described above, in the dismantling device 15, the height of the concrete wall 20 is adjusted by the ball screws 30 and 31, and the concrete block 19 and the concrete block 19 to be cut by the hydraulic cylinders 18 and 18 of the side wall 16b of the main body 16. It is integrally fixed to the main body 16.

A method of using the dismantling apparatus 15 thus formed to cut and dismantle the concrete wall 20 will be described.

First, a concrete device 20 to be dismantled in a large cylindrical shape is disassembled by a crane (not shown) to dismantle the device 1.
5 is hung down, and the concrete wall 20 as shown in FIG.
The main body 16 having a U-shaped cross section can be straddled. And the main body 16
Side wall 16b of the hydraulic cylinders 18, 18 and the clamping portion 33
The rods of the hydraulic cylinders 18a and 18b are sequentially extended to fix the main body 16 to the concrete wall 20.

First, in order to cut concrete vertically, the cutting device 17 is remotely operated.
The drive motors 24 and 24a and the blade drive motor 26 are rotationally driven to rotate the blade 23 to move the movable casing 29 rearward, and the movable casing 17 is moved.
By moving b downward, the concrete wall 2
The 0 is cut as shown by the cutting line 25.

Then, the cutting line 25 extends downward to a predetermined position.
After the formation, the moving casing 29 is moved in the forward direction so that the blade 23 that is cutting and rotating is moved to the concrete wall 20.
Away from. Further, the rotation of the blade drive motor 26 is stopped, and then the drive motor 24 is reversely rotated to move the movable casing 17b upward.

Next, when the above-mentioned vertical concrete cutting is performed on the entire circumference or a part of the circumference of the concrete wall, the rotating mechanism A of the dismantling device 15 is remotely operated. As a result, the cutting device 17 is moved to the state shown in FIG.
The blade 23 is made horizontal by laying it down as shown in FIG.

Then, the dismantling device 15 is hung by a crane and is laid across the concrete block 19 to be cut as shown in FIG. The height below the flange 16c is adjusted to adjust the height of the disassembly device 15.
Next, the rods of the hydraulic cylinders 18 and 18 on the side wall 16b of the main body are extended so that the concrete block 19 is attached to the main body 1.
Fix 6 to achieve integration.

After that, the rods of the hydraulic cylinders 18a and 18b are extended to clamp the clamping portion 33 on the concrete wall 20. Then, the blade 23 of the cutting device 17 is rotated by the drive motor 26, and then the drive motor 24a is rotated to move the movable casing 29 in the backward direction so that the blade 23 approaches the concrete block 19 and is cut. .. Further, the drive motor 24 is rotated to move the movable casing 17b to the left to completely cut and separate the concrete block 19 from the concrete wall 20.

Even if the concrete block 19 is cut and separated, since the block 19 is integrated with the main body 16 of the dismantling device 15 and is supported by the concrete wall 20 via the ball screws 30 and 31, the concrete is not supported. It does not fall off the wall 20.

When the horizontal cutting operation of the concrete block 19 by the dismantling device 15 is completed, the rods of the hydraulic cylinders 18a and 18b of the holding portion 33 are retracted, and the ball screws 30 and 31 are connected to the motor 3 by the motor 3.
2 is reversely rotated and moved upward, and the dismantling device 15 and the concrete block 19 are carried out to the outside together by the crane via the wire 22.

When the concrete block 19 is carried to a predetermined place outside, the rods of the hydraulic cylinders 18, 18 of the dismantling device 15 are retracted to release the fixation between the concrete block 19 and the main body 16, and the concrete block 19 is removed. Collect. Next, the dismantling device 15 is lifted by a crane and the horizontal cutting work of the concrete block is repeated again to collect the concrete block.

In this way, a large number of cutting lines are formed in the vertical direction on the concrete wall 20 and cut in the horizontal direction to cut and separate the concrete block from the concrete wall, and carry it out to the outside together with the dismantling device. This cutting work is performed sequentially from the upper circumferential direction of the concrete wall to the lower circumferential direction, and eventually the entire concrete wall 20 is dismantled and removed. Further, in the above embodiment, the cutting in the vertical direction is preceded, the cutting lines in the vertical direction are formed at a number of places, and then the horizontal cutting work is continuously performed, but the cutting in the vertical direction is not performed. Immediately after the cutting, the horizontal cutting may be performed to cut and separate the concrete block at each location, and the concrete block may be collected.

The disassembling apparatus of the present invention is not limited to the one embodiment described above, and various known means can be applied to the rotating mechanism as long as the cutting apparatus can be rotated in two directions, the vertical direction and the horizontal direction. Further, it goes without saying that the method of making the blade of the cutting device movable back and forth, vertically and horizontally with respect to the concrete wall is not limited to this embodiment. Further, the disassembling apparatus of the present invention can be applied not only to a cylindrical concrete wall but also to a flat concrete wall.

[0036]

As described above, the concrete wall dismantling apparatus of the present invention comprises a main body having a U-shaped cross section which is suspended from the upper side of the concrete wall to be cut and is laid over.
A cutting device provided on a side wall of the main body, the blade including a blade for cutting the concrete wall, a rotating mechanism interposed between the main body and the cutting device for rotating the cutting device in a vertical plane, and a side wall of the main body. Since it is provided with fixing means for fixing the main body to the concrete wall, the device itself is compact and easy to handle, and it is possible to perform concrete cutting work in two directions, vertical and horizontal. It improves work efficiency. In addition, the concrete block cut and separated from the concrete wall can be recovered by using the dismantling device as it is as a recovery device, so that a separate recovery device is not required, which reduces costs and improves work efficiency. ..

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of vertical cutting of a disassembling apparatus according to the present invention.

FIG. 2 is a perspective view showing an embodiment of horizontal cutting of the disassembling apparatus according to the present invention.

FIG. 3 is a perspective view of a disassembling apparatus according to a conventional example.

FIG. 4 is a plan view of a disassembling apparatus according to a conventional example in use.

[Explanation of symbols]

12 turntable of rotating mechanism A, 13 also drive motor, 14 worm, 15 dismantling device, 16 dismantling device body, 17 cutting device, 18 hydraulic cylinder, 19 concrete block, 20 concrete wall, 21 engaging part, 22 crane Wire, 23 blade, 24 drive motor, 25 cutting line, 26 blade drive motor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Ogi 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Nagayoshi Yoshihara 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Hisao Ozaki 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Satoshi Uebayashi 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Harenori Yasoshima 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.

Claims (1)

[Claims] 1. A main body having a U-shaped cross section, which is hung from above a concrete wall to be cut and hung from above, and a cutting device including a blade provided on a side wall of the main body to cut the concrete wall. A rotating mechanism interposed between the main body and the cutting device for rotating the cutting device in a vertical plane, and a fixing means provided on a side wall of the main body for fixing the main body to the concrete wall. Dismantling device that becomes.