JPH09109138A - Cutter for structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to cut and dismount a structure at a place where no person can approach. SOLUTION: The horizontal part 20A of a diamond wire 20 is guided by vertical cutting pulleys 15. A telescopic attachment 1 is extended or contracted to be cut vertically downward or upward. Horizontally cutting pulleys 17 are turned to guide one side of the horizontal direction of the part 20A, and the attachment 1 is moved in the horizontal direction to cut in the horizontal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure cutting device mainly used for cutting and dismantling a concrete structure.

[0002]

2. Description of the Related Art Conventionally, as such a device, (1) a cutting machine using a diamond wire (2) a cutting machine using high-pressure water (3) a wall saw machine is known.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Although there are restrictions on its use, in recent years the number of dismantlings in places where people cannot approach has increased, and conventional devices are no longer compatible.

It is an object of the present invention to provide a structure cutting device which enables cutting and dismantling in a place inaccessible by a person.

[0005]

According to the present invention, a telescopic attachment vertically attached to the tip of an arm of a construction machine, a swivel base provided at the lower end of the attachment, and a lower part of the swivel base are provided. And a pair of vertical cutting pulleys for guiding the horizontal part of the diamond wire from above, and the horizontal part which is rotated from the retracted position. And a pair of horizontal cutting pulleys for selectively guiding the roller from one side in the horizontal direction.

In the structure cutting apparatus constructed as described above, the diamond wire is operated, the attachment is extended, and the vertical part of the diamond wire is guided from above by the vertical cutting pulley to move the structure vertically downward. And then the horizontal cutting pulley is rotated to guide the horizontal part from one side in the horizontal direction, the attachment is moved horizontally to cut the structure horizontally, and finally the attachment is contracted and the vertical The structure is cut vertically upward by guiding the horizontal portion from above with a cutting pulley to finish cutting one section, and then cut the next section.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a cutting device generally designated by A is a telescopic attachment 1 which is a telescopic attachment vertically attached to the tip of an arm 6 of a clam shell 5 in the illustrated example which is a construction machine. The swivel base 2 is provided at the lower end of the attachment 1 and a cutting machine, which is attached to the lower part of the swivel base 2 and uses diamond wire, is generally shown at 10.

2 to 5, a pair of vertical beams 1 is attached to a main body 11 fixed to a swivel base 2 of a cutting machine 10.
2 are connected. Drive pulleys 13, 13 are provided on one side of the main body 11, two guide pulleys 14, 14 are provided in the middle of the beam 12, and a vertical cutting pulley 15 and a vertical cutting pulley 15 are provided at the lower end. Auxiliary pulley 16
Are provided above and below. And the pulleys 13, 1
4 and 15 winding endless diamond wire 20
Is provided. A horizontal cutting pulley 17 is provided on the outer side of the beam 12. This pulley 17
Is rotatably supported by the beam 12 by an L-shaped swivel arm 18, and can swivel in the direction of the arrow to horizontally guide the horizontal portion 20A of the diamond wire 20 from one side (FIG. 4). Reference numeral 21 in FIG. 2 is a television camera for monitoring, and reference numeral 19 in FIG. 5 is a guide plate for reliably guiding the horizontal portion 20A.

Next, the mode of cutting and dismantling will be described by taking a radioactive concrete structure of a nuclear power plant as an example.

In FIG. 1, at a position P away from the concrete structure B, at the tip of the arm 6 of the clam shell 5,
The most contracted telescopic attachment 1 of the cutting device A is mounted vertically.

Next, the clamshell 5 is moved to the position B1, the telescopic attachment 1 is extended, and the cutting machine 10 is moved so that the horizontal portion 20A of the diamond wire 20 causes one end C1 of the contour C of the structure B to be cut (see FIG. 6).

Next, the drive pulley 13 is operated to operate the diamond wire 20, and as shown in FIGS. 6 and 7, the attachment 1 is extended and guided by the pulleys 15 and 15 to lower the wire 20 vertically, and then the horizontal portion. The structure B is cut vertically downward (arrow v) at 20A and the vertical slit V is cut.
(FIG. 8) is formed.

Next, as shown in FIGS. 8 and 9, the horizontal cutting pulleys 17, 17 are turned to the solid line positions as indicated by the arrows to guide the horizontal portion 20A rearward in the cutting direction to move the attachment 1 in the horizontal direction ( Move to arrow h) and move to horizontal section 20A.
The structure B is horizontally cut with the horizontal slit H (see FIG.
0) is formed. In this way, the pulleys 16 and 16 are provided so that the diamond wire 20 will not be unwound when the structure is cut upward as indicated by the arrow v1.

Then, as shown in FIGS. 10 and 11,
The attachment 1 is contracted, and the vertical cutting pulleys 15 and 1
5 guides the horizontal portion 20A from above, and the horizontal portion 20A cuts the structure B vertically upward (arrow v1) to form a vertical slit V1 (virtually shown in FIG. 12), and a contour C, that is, one section. (Fig. 12).

[0016]

Since the present invention is configured as described above, it is possible to cut and dismantle in a place inaccessible by a person.

Further, cutting and dismantling can be performed in a place where a cutting machine cannot be installed or a work scaffold cannot be installed.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a state in which a radioactive concrete structure of a nuclear reactor according to an embodiment of the present invention is being cut and dismantled.

FIG. 2 is a perspective view showing a main part of FIG. 1;

FIG. 3 is a front view showing the periphery of the horizontal portion of the diamond wire of FIG.

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a side view of FIG. 3;

FIG. 6 is a front view showing a state at the time of cutting vertically downward.

FIG. 7 is a sectional view taken along the line AA of FIG. 6;

FIG. 8 is a front view showing a state at the time of cutting in the horizontal direction.

FIG. 9 is a sectional view taken along the line BB of FIG. 8;

FIG. 10 is a front view showing a state at the time of cutting vertically upward.

FIG. 11 is a sectional view taken along the line CC of FIG. 10;

FIG. 12 is a front view showing a cutting completion state of one section.

[Explanation of symbols]

 A ... Cutting device B ... Concrete structure C ... Contour to be cut H ... Horizontal slit P, P1 ... Clamshell position V, V1 ... Vertical slit 1 ... Telescopic Attachment 2 ... Swivel base 5 ... Clam 6 ... Arm 10 ... Cutting machine 11 ... Main body 12 ... Beam 13 ... Drive pulley 14 ... Guide pulley 15 ... Vertical Cutting pulley 16 ... Vertical cutting auxiliary pulley 17 ... Horizontal cutting pulley 18 ... Revolving arm 19 ... Guide plate 20 ... Diamond wire 20A ... Horizontal portion of diamond wire 21 ...・ TV camera for surveillance

Claims (1)

[Claims] 1. A cutting machine using a telescopic attachment vertically attached to an arm tip of a construction machine, a swivel provided at a lower end of the attachment, and a diamond wire attached to a lower portion of the swivel. At the lower end of the cutting machine, a pair of vertical cutting pulleys for guiding the horizontal part of the diamond wire from above and a horizontal cutting part for selectively guiding the horizontal part from one side in the horizontal direction by rotating from the retracted position. And a pair of horizontal cutting pulleys for cutting the structure.