JPH08270230A - Method for cutting with wire saw - Google Patents

Abstract

PURPOSE: To make it possible to use a short wire saw, and contrive a relatively small work space by directly supporting a tension pulley and a drive pulley along a cutting line on the surface of an article to be cut. CONSTITUTION: A flexible wire saw, which scatters hard particles over the front surface, is wound around an article K to be cut while a proper tensile force is being given to the saw with a tension pulley and the wire saw is moved circulatingly with a drive pulley 9, thereby cutting the article K. In this cutting method, the drive pulley 9 and the tension pulley 25 are directly supported on the surface of the cut article K along the cutting line, thereby cutting the cut article K with the wire saw sent out from both pulleys 9 and 25. As a result, there is no need to convert the traveling direction of the wire saw in the secondary dimensions, thereby accepting a short length of the wire saw. In addition to that, there is no need to install a special space, since both pulleys are directly supported on the surface of the cut article K.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting method for cutting stone materials, concrete structures and the like using a wire saw.

[0002]

2. Description of the Related Art A cutting method for cutting a loop-shaped wire saw wrapped around an object to be cut while circulatingly moving the wire saw in a predetermined direction by a drive pulley of a wire saw machine is a stone material or concrete. It is used for cutting structures. FIG. 1 illustrates this construction method. A wire saw machine 1 is supported by a guide column 2 so as to be movable back and forth.
The rope 3 is attached to the drive pulley 9 of the machine 1.
This rope 3 is hooked on rollers 5, provided on a column 4 standing on the rear end of the guide column 2, and a tension adjusting weight 6 is hung on its free end. .
Reference numeral 7 is an electric winch for lifting the lowered weight. The wire saw machine 1 is always pulled backward by the weight.

In the wire saw machine 1, a drive pulley 9 is attached to a rotary shaft of a motor 7, and a wire saw 10 is wound around the pulley. 11 is a cover. In front of the guide column 2, a pulley column 13 is provided, and wire direction conversion pulleys 15 and 15 are attached thereto. The wire saw 10 passing through the drive pulley 9 of the wire saw machine is wound around the object K to be cut through the direction changing pulleys 15 and 15.

The object to be cut in the illustrated example is a concrete structure, and through holes H, ... For passing the wire saw 10 are opened prior to cutting. Then, the wire saw 10 fed from the drive pulley 9 of the wire saw machine 1 is joined at its both ends through these through holes to form a loop shape. When the wire saw machine 1 is driven in this state, the drive pulley 9
Thus, the wire saw 10 is circulated in a predetermined direction. Since the wire saw machine 1 is pulled backward by the weight 6, tension is constantly applied to the wire saw 10 and the wire saw machine 1 is pressed against the workpiece K. Therefore, cutting is performed by the moving wire saw. Reference numerals 20 and 20 in the figure denote guide pulleys that are attached to the object to be cut in advance.

In this method, a flexible cord-shaped wire saw 10 is used.
Wraps around the object to be cut along the cutting line and cuts while circulating it, so it is relatively easy to cut large structures and objects with complicated shapes, and it is also possible to cut underwater etc. It also produces less noise and vibration. For this reason, it has recently been widely adopted in urban civil engineering and the like.

As the wire saw 10, as shown in FIG. 2, a large diameter cylindrical bead portion B is provided at a predetermined pitch on the outer peripheral portion of a flexible cord C, and the bead is Generally, a so-called diamond wire in which hard tooth bodies such as diamond particles are embedded in the surface of the groove portion is used. As the cord body C, a metal wire W is provided as a core in a core portion, and a rubber is provided at an outer peripheral portion thereof. What is provided with a flexible coating (spacer) S such as synthetic resin is used.

[0007]

In the conventional cutting method described above, the drive pulley 9 and the tension applying device of the wire saw machine are supported by a relatively long guide column as shown in FIG. It was installed at a position away from the cut object, and the running direction of the wire saw fed from the cut object was two-dimensionally converted by a plurality of guide pulleys for cutting.

However, in the above-mentioned conventional method, the wire saw 10 is removed from the device installed at a position distant from the cutting position.
Therefore, there is a problem that a long wire saw (which is expensive) and a wide working space are required.

[0009] Recently, relatively small cross-sections are often cut by this method for urban civil engineering and construction work.
In such a case, the conventional construction method, which requires a large work space and a long wire saw, is uneconomical and the work efficiency is poor.

Therefore, an object of the present invention is to provide a cutting method which requires a relatively small working space and a short wire saw.

[0011]

In order to solve the above problems, the present invention employs the following configurations. That is, in the cutting method according to the present invention, a wire saw having flexibility in which hard particles are dispersed is wound around the object to be cut, and an appropriate tension is applied by a tension pulley while driving. In a cutting method for cutting the object to be cut by circulating the wire saw with a pulley, the drive pulley and the tension pulley are supported along a cutting line on the surface of the object to be cut. It is characterized in that an object to be cut is cut by a wire saw fed from these pulleys.

[0012]

The driving pulley and the tension pulley are supported along the cutting line on the surface of the object to be cut, and the wire saw fed from these pulleys cuts the object to be cut. The plane becomes a single plane including the cutting line. According to this construction method, there is no need to convert the traveling direction of the wire saw in two dimensions, and therefore the length of the wire saw can be short. Further, since the driving pulley and the tension pulley are directly supported on the surface of the object to be cut, it is not necessary to provide a special installation space.

[0013]

Embodiments of the present invention will be specifically described below. In this construction method, as shown in FIGS. 3 and 4, the drive pulley 9 and the tension pulley forming the wire saw machine 1 are arranged.
The supporting device of the tool 25 is directly attached to the object W to be cut. In this case, the drive pulley 9 and the tension pulley 25 are supported along the cutting line L as shown in FIG.
The wire saw 10 fed from these passes along the cutting line L.

The support device 30 for supporting the drive pulley 9 comprises:
Base 3 fixed to the surface of the object to be cut K with anchor bolts
2 and a pair of guide rods 33, 3 on this base
3 are erected. These guide rods have a machine frame 3
A pair of guide cylinders 35, 35 provided in No. 4 are slidably fitted.

A motor 37 for rotating the drive pulley 9 is attached to the center of the machine frame 34, and the drive pulley is attached to the rotary shaft of the motor. A frame 39 for connecting and fixing both guide rods is provided at the upper ends of the pair of guide rods 33, 33. A nut member provided at the center of the connecting frame has a screw rod 41 with a handle 40. Are screwed together. The lower end of the screw rod 41 is the machine frame 3
It is connected to 4 so that it can rotate freely. Therefore, when the screw rod is turned by the handle 40, the machine frame 34 moves up and down together with the drive pulley 9.

A support device 45 for supporting the tension pulley 25 is a guide column 46 similar to the conventional guide column 2 provided with a base 47 at the end thereof, and this base is an anchor bolt. Is fixed on the surface of the object to be cut. A rack-shaped tooth row 49 is provided on the guide column 46, and a moving frame 50 is fitted therein. A gear 52 that meshes with the rack-shaped tooth row 49 is provided on the moving frame 50, and a large-diameter drum 55 is attached to a rotary shaft 53 of the gear. A rope 57, one end of which is fixed to the drum, is wound around the drum 55. The rope 57 fed from the drum 57 is a pair of ropes provided at the tip of the guide column 46. It hangs down via Ri 58, 59.
A weight 60 for tension application is suspended at the tip of the rope 57.

Between the support device 30 of the drive pulley 9 and the support device 45 of the tension pulley 25, the drive pulley is provided.
A support device 65 whose vertical position can be adjusted like the support device 65
Is provided. In this support device 65, a base 66 is fixed to an object to be cut by anchor bolts, and an intermediate pulley 71 is attached to a machine frame 70 which is vertically mounted on a pair of guide rods 67, 67 standing on the anchor 66. Is rotatably attached. By rotating the screw rod 73 with the handle 72, the vertical position of the intermediate pulley 71 can be adjusted.

In using this wire saw cutting device, first, the above-mentioned three supporting devices 30, 45, 65 are attached to the surface of the object K along the predetermined cutting line L by an anchor bolt (others). Use appropriate fixing means).
Then, the wire saw 10 wound around the drive pulley 9, the intermediate pulley 71, and the tension pulley 25 is wound around the object to be cut. 3 and 4 show this cutting start state, and at this time, the drive pulley 9 and the tension pulley 25 are located at the lowest position.

When the drive pulley 9 is rotated in this state to start cutting, the wire saw 10 to which tension is applied by the tension pulley 25 is used for cutting. 6 and 7 show this state. As the cutting progresses, the tension pulley 25 moves along the guide column 46 in a direction away from the surface of the object to be cut (upward in the drawings). The drive pulley 9 and the intermediate pulley 71 are kept in their original positions.

In the tension pulley 25, the drum 55 is rotated by the weight of the weight 60, and the gear 52 attached to the rotating shaft thereof rotates while meshing with the tooth row of the guide column 46. To move to. Since the diameter of the drum 55 is sufficiently larger than the diameter of the gear 52, the weight of the weight 60 can be increased and transmitted to the gear 52 by levering, so that the tension pulley can be pulled up with a large force. It will be possible. Therefore, even if a relatively small weight is used, a sufficiently large tension can be obtained, which is convenient for handling. Further, in the conventional device, since the wire saw machine itself is pulled by the weight and the wire saw 10 is pulled by the drive pulley 9 to give tension, the drive pulley has a force larger than the force for pulling the wire saw. However, in this embodiment, since the wire saw after being fed from the drive pulley 9, that is, the wire saw on the slack side is pulled to apply tension, a small weight is required.

8 and 9 show a state in which the tension pulley 25 has reached the upper end of the guide column 46 as the cutting progresses. When this happens, the machine is temporarily stopped, the drum 55 is manually rotated in the opposite direction to lower the tension pulley 25, and the drive pulley 9 is raised by that amount. Do not let -10 loosen. In this state, the operation is restarted and the cutting is performed. This operation is repeated if necessary. 10 and 11 show a state in which the tension pulley 25 is lowered to restart the operation.

When the cutting progresses further and the uncut portion is reduced as shown in FIGS. 12 and 13, the wire saw is cut.
There is a possibility that the loops of 10 become flat and interference occurs between the wire saws or between the wire saws and the intermediate pulley 71. When this happens, the machine operation is stopped, the intermediate pulley 71 is also raised, as shown in the figure, and the auxiliary pulleys 80, 80 are newly attached to the object to be cut, and the wire saw
0 is also wound around these auxiliary pulleys 80, 80. As shown in the figure, the auxiliary pulley 80 has a simple structure in which a column 82 is provided on a base 81 fixed by anchor bolts and is rotatably attached to this column. Li9,
The tension pulley 25, the intermediate pulley 71, and the like are arranged on the cutting line L.

By continuing the cutting in this way, the object to be cut K can be completely cut along the predetermined cutting line L.

According to this wire saw cutting method,
Since the entire cutting device including the wire saw machine, the intermediate pulley, the tension pulley and the like is directly attached to the surface of the object to be cut, the work space is small. Also, wire source
Since the traveling direction of 10 is one-dimensional and the loop is contained in one plane, it is not necessary to convert the traveling direction of the wire saw into two dimensions, and the wire saw can be short.
There is an advantage that the number of guide pulleys for changing the direction is small.

[0025]

As is apparent from the above description, the wire saw cutting method according to the present invention requires a smaller working space than the conventional method, and the cutting apparatus can be installed easily. In addition, the length of the expensive wire saw can be short, which is economical. Moreover, the overall compactness and ease of use made it particularly suitable for small-scale cutting work.

[Brief description of drawings]

FIG. 1 is an explanatory view of a conventional cutting method.

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

FIG. 3 is a front view at the start of cutting in one embodiment of the present invention.

FIG. 4 is a side view thereof.

FIG. 5 is a plan view showing the arrangement.

FIG. 6 is a front view in a state where cutting has progressed slightly.

FIG. 7 is a side view thereof.

FIG. 8 is a front view in a state in which cutting has further progressed.

FIG. 9 is a side view thereof.

FIG. 10 is a front view showing a state in which cutting has further progressed.

FIG. 11 is a side view thereof.

FIG. 12 is a front view showing a state where the cutting is completed.

FIG. 13 is a side view thereof.

[Explanation of symbols]

 1 wire saw machine 2 guide column 6 weight 9 drive pulley 10 wire saw 25 tension pulley 46 guide column 49 tooth row 52 gear wheel 55 drum 60 weight 71 intermediate pulley K cut object L cutting line

Claims (1)

[Claims] 1. A flexible wire saw in which hard particles are dispersed on a surface portion is wrapped around an object to be cut, and an appropriate tension is given by a tension pulley while the drive pulley is used. In a cutting method in which a wire saw is circulated to cut an object to be cut, the drive pulley and the tension pulley are supported along a cutting line on the surface of the object to be cut, and the pulleys are supported. A method for cutting with a wire saw, which is characterized in that an object to be cut is cut with a wire saw fed out from.