JPH08270231A - Tenshion device of wire saw - Google Patents

Abstract

PURPOSE: To make it possible to provide a sufficient tensile force with a relatively small weight by mounting a larger-sized drum than a gear on a rotary shaft of a gear of a movable frame, and winding up a rope with a suspended weight around the drum. CONSTITUTION: Along a guide column 46 where a line of teeth are formed in the longitudinal direction, a movable frame 50 mounted with a tension pulley 25 is movably supported. Then, a gear is mounted on the movable frame 50 and engaged with the line of teeth of the guide column 46. A larger-sized drum than the gear is mounted on the rotary shaft of the gear. A rope whose one end is fixed with the drum, is wound up around the drum and sent out so that it may be suspended by way of a pair of pulleys installed to the tip of the guide column 46, and a weight is suspended at its tip. It is possible to provide a sufficient tensile force to the wire with a relatively small weight, since the weight of the suspended weight is made great by means of the drum, and the weight is transmitted to the tension pulleys 25.

Description

Detailed Description of the Invention

[0001]

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

[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]

When the wire saw cutting device is used for cutting, it is necessary to apply an appropriate tension to the wire saw. Therefore, for example, an air cylinder type tension device utilizing the pressing force of the air cylinder. A tension device that utilizes the gravity of the weight was attached. Of these, the weight type tension device has been widely adopted recently because it has a long stroke and can always apply a constant tension.

However, since the conventional weight type tension device pulls the wire saw machine itself equipped with the drive pulley directly rearward as shown in FIG.
A pulling force more than the force for circulating the wire saw by the rotation of the drive pulley was required. For this reason, a large weight is required, and a great deal of labor is required for handling.
It was also dangerous.

Therefore, an object of the present invention is to make it possible to apply sufficient tension to the wire saw with a relatively small weight.

[0010]

In order to solve the above problems, the present invention employs the following configurations. That is, the wire saw tension applying device according to the present invention is such that a wire saw having flexibility in which hard particles are dispersed on a surface portion is wrapped around an object to be cut, and an appropriate tension is applied to the wire saw. -A tensioning device of a wire saw device that circulates and moves the wire saw with a re-saw, and a guide column in which a tooth row is formed along the longitudinal direction, and a guide column that moves along the guide column. A movable frame that is movably supported, a tension pulley that is attached to the movable frame, a gear that is attached to the movable frame and that meshes with the tooth row of the guide column, and a gear that is attached to the rotary shaft of the gear. It is characterized in that it is provided with a drum having a diameter larger than that of the gear, and a weight for imparting a rotational force to the drum via a loop wound around the drum.

As the tension device, a tension pulley around which a wire saw on the side unwound from the drive pulley is wound, and a weight for pulling the tension pulley in a direction in which the wire saw is tensioned are provided. Thus, if the wire saw machine having the drive pulley is not pulled as in the prior art, but the wire saw after being fed from the drive pulley is tensioned by the tension pulley, the drive pulley is Since the wire saw itself can be tensioned irrespective of the force applied to it, the weight of the weight can be small.

[0012]

The wire saw is wound around the tension pulley, the rope having the weight attached is wound around the drum, and the wire saw is circulated by the drive pulley. The drum attached to the shaft of the gear that meshes with the tooth row of the guide column is given a forcible rotational force by the gravity of the weight, so that when the tension of the wire saw becomes small, the drum is rotated together with the gear. Therefore, the moving frame to which the wire saw is attached moves along the guide column, and the tension pulley around which the wire saw is wound moves as a result, so that the wire saw is tensioned.

Since the diameter of the drum is larger than the diameter of the gear, the rotational force applied to the drum is enlarged and transmitted to the gear. Therefore, even a relatively small weight can give a great tension.

As a tension device, the wire saw machine equipped with a drive pulley for circulating the wire saw is not pulled, but the wire saw sent from the drive pulley is tensioned by the tension pulley. By doing so, the wire saw can be tensioned regardless of the reaction force applied to the drive pulley, so that the weight of the weight can be reduced as compared with the conventional method of pulling the wire saw machine itself.

[0015]

Embodiments of the present invention will be specifically described below. In this wire saw device, as shown in FIGS. 3 and 4, the device for supporting the drive pulley 9 and the tension pulley 25 constituting the wire saw machine 1 is directly attached to the object K to be cut. It has become. In this case, the drive pulley 9 and the tension pulley 25 are supported along the cutting line L as shown in FIG. 5, and the wire saw 10 fed from these is fixed so as to pass on the cutting line L. It

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 central portion 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 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 for the drive pulley 9 and the support device 45 for 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-type cutting device (wire saw device), first, the above-mentioned three supporting devices 3 are used.
0, 45, 65 are fixed to the surface of the workpiece K along the predetermined cutting line L by anchor bolts (other suitable fixing means may be used). 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
Represents this disconnection start state, and at this point,
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 the cutting, the wire saw 10 to which the tension is applied by the tension pulley 25 performs the 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 weight of the weight 60 causes the drum 55 to rotate, and the gear 52 attached to the rotating shaft of the tension pulley 25 rotates in a state of meshing with the tooth row of the guide column 46. Gradually wire
Move in a direction that makes you nervous. 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 25 can be pulled up with a large force. You can 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 apparatus, the wire saw machine itself is pulled by the weight to pull the wire saw 10 by the drive pulley 9 to apply tension, so that the drive pulley is operated by the wire saw machine.
Although a force more than the force for pulling is required, 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 reaches the upper end portion 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. Make sure -10 does not loosen and restart operation. During the work, this operation is repeated as necessary to cut. 10 and 11 show the state at the time of restarting the operation.

When the cutting progresses further and the uncut portion remains less 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 81 is provided on a base 81 fixed by anchor bolts and is rotatably attached to this column. Li9,
Like the tension pulley 25, the tension pulley 25 is 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.

However, the tension device of the present invention is not limited to the above-mentioned constitution, but the whole wire saw device is installed at a position apart from the object to be cut, and the wire saw travels from there by a plurality of guide pulleys. You may make it cut | disconnect by converting a direction two-dimensionally. Further, in the above embodiment, the guide column is supported in an upright state, and the weight is hung from the upper end portion thereof. However, in some cases, the guide column is held in a laid state and the weight is hung down to another position. You may do it. However, it is necessary to pull the tension pulley in the direction in which the wire saw is tensioned by the weight.

[0028]

As is apparent from the above description, the tension device for a wire saw according to the present invention makes it possible to apply the required tension to the wire saw with a weight lighter than the conventional weight. .

[Brief description of drawings]

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

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 of the pulleys.

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 (2)

[Claims] 1. A flexible wire saw having hard particles dispersed on its surface is wrapped around an object to be cut, and while being applied with an appropriate tension, the wire saw is circulated and moved by a drive pulley. A tension device of a wire saw device for cutting an object to be cut, comprising a guide column in which a tooth row is formed along the longitudinal direction, and a moving frame movably supported along the guide column, A tension pulley attached to the moving frame, a gear attached to the moving frame and meshing with a tooth row of the guide column, and a drum having a diameter larger than that of the gear attached to the rotating shaft of the gear; A tension device for a wire saw, comprising: a weight for applying a rotational force to the drum via a rope wound around the drum. 2. A flexible wire saw having hard particles dispersed on its surface is wrapped around an object to be cut, and while being applied with an appropriate tension, the wire saw is circulated and moved by a drive pulley. A tensioning device of a wire saw device for cutting an object to be cut, comprising: a tension pulley around which a wire saw fed from the drive pulley is wound; and a tension saw for tensioning the wire saw. A tension device for a wire saw, comprising: a weight that pulls in a direction.