JP3015895B2 - Cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire saw type cutting apparatus suitable for use in cutting stones, concrete structures and the like.

[0002]

2. Description of the Related Art A cutting device which cuts a wire so as to circulate in a predetermined direction by a driving pulley while pressing the wire saw over a plurality of pulleys and presses it against an object to be cut is a stone material, a concrete structure or the like. Used for cutting. Since this cutting device wraps a wire saw around an object to be cut and cuts with the wire saw, it can relatively easily cut a large structure or an object having a complicated shape, and can be used underwater or the like. Since cutting is also possible, it has recently been widely used in urban civil engineering and the like.

[0003] As a wire saw, a flexible cord body in which hard teeth such as diamond particles are buried on the surface thereof is generally used, and this wire saw is bent linearly or at a relatively large angle. In this state, cutting is performed by pressing against the object.

[0004]

However, in the above-mentioned conventional wire-saw type cutting apparatus, for example, when cutting an iron plate-shaped frame integrally provided on the surface of a concrete, the iron plate portion is made concrete. Since the wire saw is much harder to cut than the part, the wire saw can be bent at a sharp angle in the form as the cutting progresses, and the wire saw often breaks.

Accordingly, the present invention provides a cutting device which can smoothly cut an object having a partially different cutting property, such as an iron plate-shaped frame, and is less likely to cause an accident such as breakage of a wire saw. That is the task.

[0006]

In order to solve the above problems, the present invention employs the following configuration. In other words, a cutting device according to the present invention is a cutting device that cuts a wire so that it is stretched across a plurality of pulleys by moving the wire saw in a predetermined direction and pressing the wire saw against the material to be cut. A pair of movable guide pulleys arranged on both sides of the wire guide for guiding the wire saw, and a pulley moving device for independently moving the movable guide pulley in a cutting direction intersecting a cutting line. It is characterized by.

[0007]

In this cutting device, a wire saw running in a certain direction is pressed against an object to be cut, and a pair of movable guide pulleys arranged on both sides of a cutting line with the object to be cut interposed therebetween are provided. And the guide pulleys are moved independently of each other by a pulley moving device in a cutting direction intersecting the cutting line. Thereby, sharp bending of the wire saw can be prevented.

[0008]

Embodiments of the present invention will be specifically described below. FIG. 1 shows an embodiment of the present invention, in which a cutting apparatus 1 performs cutting with a loop-shaped wire saw-3 fed from a known wire machine 2. As shown in FIG. 2, the wire saw-3 has a flexible cord 4
Are provided at a predetermined pitch on the outer periphery of the bead, and the beads are of a known type in which diamond particles are implanted on the surface of the bead. As an example of a wire saw, for example, the diameter of the cord 4 is 5 mm, the diameter of the bead 5 is 10.5 mm, and the bead pitch is 25 mm. Are dispersed and planted.

As shown in FIG. 3, the wire machine 2 has a main body 10 having a driving pulley 9 which is driven to rotate by a motor 7 so as to be able to move back and forth along a rail 11. And a biasing device 14 for pulling the main body rearward.
Is provided. The biasing device 14 is provided with a weight 17 and a winch 18 for winding the weight at the other end of a wire 16 having one end attached to the main body, and the main body is constantly pulled rearward by the weight. When the wire saw is loosened, the body is moved backward by the action of the weight, so that an appropriate tension is always applied to the wire.

The wire saw-3 is provided with a drive pulley 9 for the main body.
And is sent out from the feeding pulley 20 to be guided to the workpiece 21 and finally to the driving pulley 9 via the pull-in pulley 22, It has a loop shape as a whole.

The cutting device 1 is provided with a guide device 25 for guiding the wire saw in the cutting direction in addition to the pulleys described above. The guide device 25 has a pair of rails 27, 27 arranged on both sides of the object 21 to be cut. The rail 27 has a rack 2 along its longitudinal direction.
9 are provided. In the illustrated example, the rail 27 is fixed to and supported by the workpiece 21, but may be supported by another supporting device along the workpiece.

A pulley stand 30 is provided below the rail 27, and finishing pulleys 31,... The lower part of the rail arranged on the side opposite to the wire machine 2 across the object to be cut,
A guide pulley 32 is provided. Further, on the upper portions of the left and right rails 27, 27, a movable guide pulley 35,
36 are provided respectively. Mobile guide pulley 3
5 and 36 are attached to moving devices 37 and 38 which move along the rails 27 and 27 so as to move integrally with the moving devices.

The moving devices 37 and 38 are mounted on the rail symmetrically in the vertical direction because the mounting positions on the rails are reversed left and right, but are structurally the same.
The device 37 on the right side of the figure will be described. This moving device 3
Reference numeral 7 designates a frame 40 surrounding the rail 21. Wheels 42, which roll while holding the flange portion of the rail 27 from both front and back sides, are mounted on the frame 40. Reference numeral 43 denotes a drive motor for traveling, and reference numeral 45 denotes a speed reducer. A belt 49 is hung on a drive pulley 47 and a driven pulley 48 attached to the rotating shaft thereof. Intermediate shaft 50 with pulley 48 attached
Is connected to a rotating shaft 53 via a bevel gear device 52, and a pinion 55 attached to the tip of the rotating shaft 53 is engaged with the rack 29 of the rail 27. Therefore, when the motor 43 is rotated, the frame 40 moves along the rail through the engagement between the pinion 55 and the rack 29.

The frame 40 of the moving device includes a wire source.
A movable guide pulley 35 for guiding the wire saw-3 fed from the machine 2 and a cooling nozzle 59 for discharging cooling water toward the cutting position of the workpiece 21 are provided. Water supply pipe 6 from a water supply device (not shown)
0 is connected. The motor 43 is electrically connected to a control device 62, and the driving of the motor 43 is controlled by the control device.

When using the cutting apparatus 1, first,
A wire saw is applied to an object 21 to be cut such as an iron plate formwork concrete wall.
3 are pierced. And
The guide devices 25, 25 are installed on both sides of the object to be cut, and one of the wire saws-3 drawn out from the wire saw machine 2 is passed through the finishing pulley 31 of the pulley stand (the lower side in the illustrated example). Through the through hole 70. The wire saw is hung on the movable guide pulley 35 via the guide pulley 32, and is hung on the movable guide pulley 36 on the outlet side through the upper through hole 70.
It is returned to the wire saw machine 2 via the finishing pulley 30 of the gantry 30.

When the wire saw machine 2 is operated in this state, the wire saw-3 is circulated in the direction of the arrow in FIG.
Is ejected toward. Therefore, the left and right moving devices 3
When 7, 38 is gradually moved downward, the traveling wire saw-3 comes into contact with the object to be cut, so that continuous cutting is performed. Since the cooling water is constantly applied to the cutting portion, the temperature of the wire saw is prevented from rising, and cutting chips are effectively eliminated. The discharged cooling water is received by the gutters 75,... And discharged to the outside or used for circulation.

The moving devices 37 and 38 of the cutting device 1
It is driven independently of each other, and by controlling the moving speed of both, it is possible to cut the wire-3 so that the wire-3 does not bend at an unreasonable angle even if the workpiece has partially different hardness, and It is possible to control the shape.
The broken lines L,... In the figure represent the bending state of the wire saw-3 at various stages during cutting, and by maintaining the feed speed of the left and right moving devices, maintaining such a smooth cutting line. You can do it. For this reason, the cutting of the iron plate formwork concrete structure and the cutting of the reinforced concrete, the stone material and the like can be performed well. As the cutting progresses, the length of the wire saw around the object to be cut becomes gradually shorter.
Since the wire saw is always pulled by 7, the wire saw does not loosen. When the weight falls too much, it may be wound up by the winch 18.

In the illustrated example, the moving device is vertically cut and cut. However, it goes without saying that horizontal and diagonal cutting can be performed similarly. Since the drive control of the moving device can be performed remotely, there is little danger of radiation exposure even when used for cutting, for example, a structure related to a nuclear reactor. Similarly, by improving the waterproofness, underwater cutting can be easily performed by remote control.

[0019]

As is apparent from the above description, the cutting device according to the present invention comprises a pair of moving devices which move independently of each other in a direction intersecting the cutting line on both sides of the cutting line. Provided with a movable guide pulley for guiding the wire saw, it is possible to arbitrarily adjust the pressing force of the wire saw and to perform cutting with partially different hardness. However, it has become possible to perform good cutting.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a wire saw.

FIG. 3 is an external view of a wire saw machine.

FIG. 4 is a front view of the moving device.

FIG. 5 is a side view of the moving device.

FIG. 6 is a plan view of the moving device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cutting device 2 wire saw machine 3 wire saw 21 object to be cut 25 guide device 35 movable guide pulley 36 movable guide pulley 37 moving device 38 moving device 40 frame 43 motor

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuhiko Kato 4-33 Kitahama Higashi, Chuo-ku, Osaka-shi, Osaka Inside the Obayashi Corporation Head Office (72) Inventor Minoru Kanazawa 4-33, Kitahama-higashi, Chuo-ku, Osaka, Osaka No. Obayashigumi Co., Ltd. (72) Inventor Shinichi Takayama 4-33 Kitahama Higashi, Chuo-ku, Osaka City, Osaka Prefecture (56) References JP-A 5-185422 (JP, A) Hei 5-58220 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B28D 1/00-7/04

Claims (2)

(57) [Claims] 1. A cutting device for cutting a workpiece by pressing a workpiece while moving a wire saw stretched over a plurality of pulleys in a predetermined direction. A cutting device comprising: a pair of movable guide pulleys for guiding a wire saw; and a moving device for independently moving the movable guide pulley in a cutting direction intersecting a cutting line. 2. A cutting device in which a wire saw hung over a plurality of pulleys is pressed against an object to be cut while being moved in a predetermined direction, thereby cutting the object. A cutting device, wherein a nozzle for discharging cooling water toward the cutting portion is provided on the support member of the rib.