JPH0632007U - Guide device for wire saw - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a guide device in which there is no risk of contact between wire saws at the end of cutting. [Construction] The guide device has a support frame 10, four inner pulleys 12 and 13 and outer pulleys 14 and 15 that form a pair, and first to fourth auxiliary pulleys 16 to 19. The support frame 10 includes a base plate 10a and a T-shaped horizontal frame portion 10
It has a c, a vertical frame portion 10d, and an L-shaped frame portion 10e. Inner and outer pulleys 12 to 15 are horizontal frame parts
They are rotatably supported such that they are arranged at substantially equal intervals on 10c, the centers of rotation are located on a line passing through the central axis of the horizontal frame 10c, and the planes of rotation are located on the same horizontal plane.
In addition, the inner pulleys 12 and 13 have outer diameters of the outer pulleys 14 and 1
It is smaller than the outer diameter of 5.

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 a purpose is disclosed in Japanese Patent Publication No. 10957/1992. The guide device shown in this publication is arranged close to the object to be cut, the center of rotation is located on the same straight line, and the plane of rotation is located on the same plane. A wire saw, which has inner and outer pulleys and is wound endlessly between the object to be cut and the drive pulley, is inserted in an S shape between the inner and outer pulleys.

In the guide device configured as described above, at the end of cutting with the wire saw, the distance between the tension side and the loose side of the wire saw does not become narrower than the distance between the outer pulleys, which causes cutting of the wire saw. No sharp bends are formed to prevent the wire saw from being cut, and when cutting is completed and the wire saw is separated from the object, the wire saw is hooked between the inner and outer pulleys to prevent its scattering. It However, the guide device having such a structure has the technical problems described below.

[0006]

[Issues to be solved by the device]

 That is, in the guide device described above, since four pulleys are arranged close to the object to be cut, at the end of cutting, the wire saw wound around the inner pulley and the object to be cut are introduced. , Or the wire saw drawn out from the object to be cut becomes very close to each other, and especially on the loose side of the wire saw, they may contact each other, and such a contact state occurs. This will lead to the cutting of the wire saw.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a guide device in which there is no fear of contact between wire saws at the end of cutting. .

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is rotatably supported by being placed in the vicinity of an object to be cut, the center of rotation being on the same straight line, and the plane of rotation being on the same plane. A wire saw, which has four inner and outer pulleys forming a pair and is wound endlessly between the object to be cut and the drive pulley, is inserted in an S shape between the inner and outer pulleys, and a predetermined tension is applied. In the guide device that guides the wire saw in a predetermined direction when the object to be cut is cut by circulating running in a state, the outer diameter of the pair of inner pulleys is smaller than that of the pair of outer pulleys. Is characterized by.

Further, in the guide device having the above structure, the inner and outer pulleys are rotatably supported in a horizontal plane, and are rotatably supported in a vertical plane close to the inner and outer pulleys. It is possible to provide three auxiliary pulleys and one auxiliary pulley rotatably supported in the same horizontal plane as the inner and outer pulleys.

[0010]

[Action]

 According to the above configuration guide device, since the outer diameter of the pair of inner pulleys is smaller than that of the pair of outer pulleys, the wire saw wound around the inner pulley and the object to be cut are wound at the end of cutting. The distance between the wire saw and the wire saw introduced from the cutting object is maintained.

[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, four inner pulleys 12 and 13 and outer pulleys 14 and 15 that form a pair, and four first to fourth auxiliary pulleys 16, 17, and 18, 19 and 19.

In this embodiment, the support frame 10 includes a base plate 10a fixed near an object to be cut, and a substantially T-shaped horizontal frame portion 10c fixed to the base plate 10a via legs 10b. The base plate 10a has a vertical frame portion 10d standing upright, and an L-shaped frame portion 10e fixed between the horizontal frame portion 10c and the vertical frame portion 10d.

The four inner and outer pulleys 12 to 15 are arranged at one end of the T-shaped horizontal frame portion 10c at substantially equal intervals, and the center of rotation is on a line passing through the central axis of the horizontal frame portion 10c. And is rotatably supported by the horizontal frame portion 10c such that the surfaces of rotation are located on the same horizontal plane. The outer diameters of the pair of inner pulleys 12, 13 located inside the outer pulleys 14, 15 are smaller than the outer diameters of the outer pulleys 14, 15.

On the other hand, the first to fourth auxiliary pulleys 16 to 19 are formed to have substantially the same outer diameter as the inner pulleys 12 and 13, and the first and second auxiliary pulleys 16 and 17 have a predetermined vertical direction. It is rotatably supported by the vertical frame portion 10d at intervals of. The first and second auxiliary pulleys 16 and 17 have their centers of rotation on the central axis of the vertical frame portion 10d and rotate in the same vertical plane. The third auxiliary pulley 18 is rotatably supported at a corner of the L-shaped frame portion 10e, and its rotation surface is set to be the same vertical surface as the first and second auxiliary pulleys 16 and 17.

The fourth auxiliary pulley 19 is provided on the other end side of the horizontal frame portion 10c and is supported so as to rotate in the same horizontal plane as the inner and outer pulleys 12 to 15. The first auxiliary pulley 16 is set so that the extension of the center line of its annular groove coincides with the tangent line passing through the inside of the annular groove of the inner pulley 13. Further, the third auxiliary pulley 18 is set so that the extension of the center line of the annular groove thereof coincides with the tangent line passing through the inside of the annular groove of the fourth auxiliary pulley 19.

The guide device configured as described above is used, for example, as shown in FIG. The usage example shown in the figure is an example in which the guide device of the present invention is used when horizontally cutting an object to be cut a. When using the guide device, first, the inner and outer pulleys 12 to 14 are to be cut. The base plate 10a of the support frame 10 is fixed so as to be close to the object a.

When the support frame 10 is fixed, the wire saw b is wound around the pulleys 12 to 19. When winding the wire saw b, first insert the wire saw b into the ring-shaped groove of the third auxiliary pulley 18, then insert the wire saw b into the ring-shaped groove from the inside to the outside of the fourth auxiliary pulley 19, and then , Is inserted inside the inner pulley 12. Next, the wire saw b is inserted in an S shape between the inner and outer pulleys 12 and 14, and is introduced into one of the outer circumferences of the cutting object a.

The wire saw b wound around the outer periphery of the object to be cut a is led out from the other side, goes around the outer periphery of the outer pulley 15, and is inserted in an S shape between the inner and outer pulleys 13, 15. It is passed from the inner side of the inner pulley 13 to the lower side of the first auxiliary pulley 16, and then inserted in an S shape between the first and second auxiliary pulleys 16 and 17, and is wound around a drive pulley (not shown).

As described above, when the wire saw b is installed between the object to be cut a and the drive pulley in an endless state, the wire saw b is circulated while a predetermined tension is introduced, and thereby the wire saw b is run. A frictional force is generated in a portion where the wire saw b and the cutting object a are in contact with each other, and the skeleton a is cut by the frictional force. In such a cutting operation, in the guide device of the present invention, at the end of the cutting, the wire saw b wound around the outer circumference of the inner pulleys 12 and 13 as shown by a virtual line in FIG. The distance between the wire to be introduced into the object to be cut a or the wire saw b to be led out from the object to be cut a is very narrow, but the outer diameter of the inner pulleys 12 and 13 is smaller than the outer diameter of the outer pulleys 14 and 15. Therefore, the contact between the wire saws b is avoided even on the loose side of the wire saws b.

Further, in the guide device of the present embodiment, since the four auxiliary pulleys 16 to 19 are arranged close to the inner and outer pulleys 12 to 15, they are horizontally wound around the cutting object a. The end of the wire saw b can be pulled out without causing vertical derailment. In the above-mentioned usage example, the guide device of the present invention is used for horizontal cutting of the object a. However, the use of the guide device of the present invention is not limited to this, and vertical or oblique cutting can be performed. It can also be used when

[0021]

[Effect of device]

 As described above in detail in the embodiments, in the wire saw guide device according to the present invention, it is possible to prevent the wire saws from contacting each other at the final stage of cutting, and to avoid the cutting of the wire saws due to the contact.

[Brief description of drawings]

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

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

3A and 3B are a plan view and a side view of a use state of the guide device of FIG.

[Explanation of symbols]

 10 Support frame 12 and 13 Inner pulley 14 and 15 Outer pulley 16 to 19 Auxiliary pulley

Claims (2)

[Scope of utility model registration request] 1. A pair of four rotatably supported members which are arranged in the vicinity of an object to be cut, whose rotation centers are on the same straight line, and whose rotation surfaces are on the same plane. A wire saw that has an outer pulley and is wound endlessly between the object to be cut and the drive pulley is inserted in an S shape between the inner and outer pulleys, and circulates in a predetermined tension state. A guide device for guiding the wire saw in a predetermined direction when cutting an object to be cut, wherein the outer diameter of the pair of inner pulleys is smaller than that of the pair of outer pulleys. 2. The inner and outer pulleys are rotatably supported in a horizontal plane, and three auxiliary pulleys are rotatably supported in a vertical plane in the vicinity of the inner and outer pulleys. The guide device for a wire saw according to claim 1, further comprising: one auxiliary pulley rotatably supported in the same horizontal plane as the inner and outer pulleys.