JPH0632005U - Guide device for wire saw - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a guide device capable of pulling out a wire saw in an arbitrary angle direction. [Structure] The guide device includes a support frame 10, three main pulleys 12 to 14, and a pair of auxiliary pulleys 15 and 16. The support frame 10 has a base plate 10a, a horizontal frame portion 10c, and a swing arm 10d whose one end is pivotally supported by the frame portion 10c so as to be rotatable. The swing arm 10d rotates along the curved guide portion 10e, and the curved guide portion 10e is provided with a guide hole 10f bent in an arc shape, and the guide hole 10f is provided in the arm 10d. The attached guide bolt 10g is inserted. The swinging arm 10d that has been rotated is fixedly supported by screwing a nut onto a bolt 10g. The auxiliary pulleys 15 and 16 are rotatably attached in the same plane on the end side of the frame portion 10c. The main pulleys 12 to 14 are pivotally attached to the swing arm 10d so that the planes of rotation thereof are flush with each other so that the centers of rotation are located at the respective vertices of the triangle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a guide device used in a wire saw method adopted for cutting concrete structures and the like.

[0002]

[Prior art]

 The wire saw method is a method of cutting a reinforced concrete structure or stone material using a wire saw in which beads on which granular diamond is electrodeposited or sintered are attached to a wire. For example, Japanese Patent Publication No. 3-53426. The structure is disclosed in Japanese Examined Patent Publication No. 3-534727, etc., and the wire saw method disclosed in these publications has the advantage that it can cut with high efficiency and has little effect on the surrounding environment. There is.

By the way, in this type of construction method, for example, when a columnar object is to be cut, it is constructed by winding a wire saw around the object to be cut and frictionally running it with a drive pulley. However, the wire saw is wound endlessly between the object to be cut and the drive pulley, and a guide pulley that changes the traveling direction is installed at an appropriate place to guide the wire saw in a predetermined direction, and the drive pulley is moved backward. A certain tension is introduced by means such as moving.

An example of a guide device used for such an application is disclosed in Japanese Utility Model Publication No. 4-13127. The guide device disclosed in this publication includes a support frame fixed to a frame, a pair of main pulleys rotatably supported by the support frame, and a direction in which a rotation surface is orthogonal to the main pulley. The guide and auxiliary pulleys are arranged in pairs, and the guide pulley annular groove is arranged on an extension of the inner tangent line of the opposing main pulley annular groove.

With the guide device configured as described above, the wire saw can be turned from the horizontal direction to the vertical direction, but there is also a technical problem described below.

[0006]

[Issues to be solved by the device]

 That is, in the wire saw method described above, construction is performed under various conditions.For example, when there are obstacles near the body to be cut, the wire saw is simply moved from horizontal to vertical or from vertical to horizontal. Since it may be difficult to cut the target object just by converting it, it was desired to develop a device that can pull out the wire saw in an arbitrary angle direction.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a guide device that can pull out a wire saw in an arbitrary angle direction. .

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a wire saw, which is wound endlessly between a cutting object and a drive pulley, and which cuts the cutting object by circulating running under a predetermined tension state. In a guide device that guides the wire saw in the direction of, the support frame fixed to the cutting target and the support frame are pivotally attached to the support frame so that the rotation surfaces are on the same plane, and the wire saw is guided to the drive pulley side. At least a pair of main pulleys, and a pair of auxiliary pulleys that are pivotally attached to the support frame so that their surfaces of rotation are on the same plane and that guide the wire saw to the cutting object side. It is characterized in that it is rotatably arranged.

One end of the support frame is pivotally supported so as to be rotatable, and a swing arm that rotatably supports the main pulley, a swing movement of the swing arm, and a setting arm are provided. It can be configured with a curved guide portion that fixes the swing arm at a predetermined angle.

[0010]

According to the above configuration guide device, since the main pulley for guiding the wire saw to the drive pulley side is rotatably arranged, the wire saw wound around the object to be cut is rotated for the main pulley. It can be pulled out in any angle direction.

[0011]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 show an embodiment of a guide device for a wire saw according to the present invention. The wire saw guide device shown in the figure includes a support frame 10, three main pulleys 12, 13, 14 and a pair of auxiliary pulleys 15, 16.

In this embodiment, the support frame 10 includes a base plate 10 a fixed to an object to be cut, a horizontal frame portion 10 c fixed to the base plate 10 a via a reinforcing stay 10 b, and a horizontal frame at one end side. It has a substantially cross-shaped swing arm 10d that is rotatably and pivotally supported by a portion 10c. The swing arm 10d rotates along a curved guide portion 10e bent in an arc shape which is provided upright on the base plate 10a, and the curved guide portion 10e has a guide hole 10f bent in an arc shape. The guide bolt 10g attached to the lower surface of the swing arm 10d is inserted into the guide hole 10f. In the support frame 10 configured as described above, the swing arm 10d moves along the guide hole 10f of the curved guide portion 10e to rotate to an arbitrary position within an angular range of about 90 degrees. It is moved and fixedly supported by screwing a nut onto the guide bolt 10g.

The two auxiliary pulleys 15 and 16 are rotatably mounted in the same plane on the end side of the horizontal frame portion 10c. On the other hand, the three main pulleys 12 to 14 are rotatably pivotally attached to the cross-shaped swing arm 10 d so that the centers of rotation are located at the respective vertices of the triangle, and the rotation surfaces of the pulleys 12 to 14 are rotatably attached. Are set to be coplanar.

Further, in this embodiment, the annular grooves of the pair of main pulleys 13 and 14 and the annular grooves of the pair of auxiliary pulleys 15 and 16 are arranged so as to have the following relationship. First, the line connecting the rotation centers of the pair of main pulleys 13 and 14 is parallel to the line connecting the rotation centers of the pair of auxiliary pulleys 15 and 16. Further, in FIG. 2, the tangents of the annular grooves of the auxiliary pulleys 15 and 16 are located on the left and right extension lines (1) of the tangents of the lower annular grooves of the pair of main pulleys 13 and 14.

FIG. 3 shows a usage state of the guide device configured as described above. In the usage state shown in the figure, the guide device of the present invention is used when horizontally cutting the skeleton a to be cut, and the base plate 10a of the support frame 10 is firstly attached to the skeleton a before use. It is fixed in place by an anchor or the like. When the support frame 10 is fixed, the wire saw b is wound around each of the pulleys 12 to 14, 15, and 16. When winding the wire saw b, first insert the wire saw b into the ring-shaped groove of the one main pulley 14, then insert the wire saw b into the ring-shaped groove around the outside of the auxiliary pulley 16 and wind the wire saw b around the outer periphery of the body a. After that, the auxiliary pulley 15 is inserted into the ring-shaped groove from the outside of the auxiliary pulley 15 so as to go around the inside of the main pulley 13, and finally inserted into the ring-shaped groove of the main pulley 12.

Both ends of the wire saw b guided by the main pulleys 12 and 14 are wound around the outer periphery of the drive pulley of the drive device (not shown), and are installed between the cutting target frame a and the drive pulley in an endless state. Then, the vehicle travels with a predetermined tension introduced, which causes a frictional force to be generated in the portion where the wire saw b and the body a are in contact with each other, and the body a is cut by this frictional force. Become.

In such a cutting operation, in the guide device of the present invention, since the main pulleys 12 to 13 for guiding the wire saw a to the drive pulley side are configured to be rotatable, the main pulleys 12 to 14 are supported. By rotating the swinging arm 10d, the angle of the rotation surface of the main pulleys 12 and 13 can be arbitrarily changed, and the pulling angle direction of the wire saw b can be arbitrarily selected. The degree of freedom in the installation position of the drive pulley is increased.

Further, in the guide device of the present embodiment, the tangents of the annular grooves of the auxiliary pulleys 15 and 16 are arranged so as to be located on the extension lines to the left and right of the tangents of the annular grooves of the main pulleys 13 and 14, respectively. Therefore, when the main pulleys 12, 13 are pivotally moved, it is possible to prevent the wire saw b from being disengaged between the annular grooves of the pulleys 13, 14, 15, 16.

In the above-mentioned use example, the guide device of the present invention is used for horizontal cutting of the object a, but the use of the guide device of the present invention is not limited to this, and the guide device may be used vertically or vertically. It can also be used for oblique cutting.

[0020]

[Effect of device]

 As described above in detail in the embodiments, in the wire saw guide device according to the present invention, the main pulley that guides the wire saw to the drive pulley side is configured to be rotatable, so that the installation location of the drive pulley is set. It is expected that the degree of freedom will be increased and the construction efficiency will be improved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a wire saw guide device according to the present invention.

2 is a plan view of the guide device of FIG. 1. FIG.

FIG. 3 is a plan view of the guide device of FIG. 1 in use.

[Explanation of symbols]

 10 Support Frame 10a Base Plate 10d Swing Arm 10e Curved Guide Part 12, 13, 14 Main Pulley 15, 16 Auxiliary Pulley

Claims (2)

[Scope of utility model registration request] 1. A guide device for guiding a wire saw, which is wound endlessly between an object to be cut and a drive pulley and cuts the object to be cut in a predetermined direction by circulating and traveling under a predetermined tension state. A supporting frame fixed to the object to be cut, at least a pair of main pulleys pivotally attached to the supporting frame so that their rotation surfaces are on the same plane, and guiding the wire saw to the drive pulley side; And a pair of auxiliary pulleys that are pivotally attached to the frame such that the rotation surfaces thereof are on the same plane and that guide the wire saw to the cutting target side, and the main pulley is rotatably disposed. Guide device for wire saw. 2. A swing arm that rotatably supports one end of the support frame to rotatably support the main pulley, guides the swing movement of the swing arm, and sets the swing arm. The guide device for a wire saw according to claim 1, further comprising a curved guide portion that fixes the swing arm at a predetermined angle.