JPH0413127Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention can be used to cut stones from a quarry to a desired size using a wire saw, or to partially cut buildings, bridges, subway walls, and other reinforced concrete structures. The present invention relates to a guide pulley stand for a wire saw, which is disposed between a wire drive device and an object to be cut to smoothly change the running direction of a cutting wire.

[Conventional technology]

A wire saw cuts an object by running a cutting wire wrapped around the object in an endless manner at the required tension and speed using a wire drive device. It is used exclusively for cutting stone from.

However, in a wire saw, due to the positional relationship between the object to be cut and the wire drive device, except in special cases, the cutting wire is moved along the required travel path through multiple guide pulleys between them. It is necessary to arrange the vehicle so that it can run. for example,
When horizontally cutting an object at a lower or higher location using a wire drive device on the ground, the cutting wire must run smoothly if there is no guide pulley interposed between them. is clearly impossible.

Conventionally, when cutting stone, the running direction of the cutting wire has been appropriately changed by installing such guide pulleys at required locations.

[Problem that the invention attempts to solve]

However, when installing guide pulleys individually at required locations as in the past, it takes a lot of man-hours to install and dismantle the guide pulleys, and the positioning between each guide pulley to allow the cutting wire to run smoothly is difficult. It also required a lot of man-hours and skill to adjust the position and angle. Furthermore, in the conventional case, despite the arrangement of the plurality of pulleys, it was difficult to cut the object to be cut into accurate dimensions and angles, for example, accurately horizontally.

In addition, especially when using a wire saw for partial cutting work on reinforced concrete structures, unlike in a quarry, there is not enough ground and space to install many guide pulleys.
It is difficult to accurately cut the object to be cut at a predetermined height regardless of whether it is at a high or low location.It takes a considerable amount of time to install, dismantle, and adjust the guide pulley, so the cutting period is long. There were some problems.

An object of the present invention is to provide a guide pulley stand for a wire saw that solves the problems of the prior art as described above.

[Technical means to solve problems]

The guide pulley stand for a wire saw according to the present invention includes a support frame, a pair of main pulleys adjacent to each other in the same plane and pivotably attached to the support frame, and the main pulleys independently rotatable in a direction perpendicular to the main pulleys. a pair of guide pulleys adjacent to each other and pivotally connected to the support frame, and a pair of auxiliary pulleys adjacent to each other and pivotally connected to the support frame so as to be rotatable independently in the same plane as the guide pulleys, and The main pulley and the guide pulley are arranged such that virtual tangent lines parallel to each other passing through the inner facing portions of the annular groove around the main pulley touch the annular groove around the guide pulley.

Hereinafter, the present invention will be explained based on the drawings. In FIGS. 1, 2, and 3, which are respectively a front view, a top view, and a left side view of an example of a guide pulley stand for a wire saw according to the present invention, the guide pulley stand A is on the same plane as the support frame 1. A pair of main pulleys 2, 2a are pivotably mounted to the support frame 1 adjacent to each other so as to be freely rotatable independently in a direction perpendicular to the main pulleys 2, 2a, and a pair of main pulleys 2, 2a are pivotably mounted to the support frame 1 so as to be freely rotatable independently in a direction perpendicular to the main pulleys 2, 2a. It consists of a pair of guide pulleys 3, 3a attached to the guide pulleys 3, 3a, and a pair of auxiliary pulleys 4, 4a pivotably attached to the support frame 1 adjacent to each other so as to be rotatable independently within the same plane as the guide pulleys 3, 3a. ing. moreover,
The above main pulleys 2, 2a, guide pulleys 3, 3
a and the auxiliary pulleys 4, 4a are the main pulleys 2,
The annular groove 5 around 2a, the closest part P in 5a,
Virtual tangent lines L and M parallel to each other passing through Pa are connected to the annular grooves 6 and 6a around the guide pulleys 3 and 3a and the top Q,
They are arranged so that they touch each other at Qa. In addition,
In the drawing, virtual tangents L and M are auxiliary pulleys 4 and 4a.
It is also made to contact the surrounding annular grooves 7, 7a at the top, but this is optional.

In the above, the main pulleys 2, 2a can be of different sizes, and the virtual tangents L,
The contact portion with M may be an inner facing portion away from the closest portions P and Pa. In addition, the induction pulley 3,
3a may be of the same size or different sizes and may be arranged on different axes, and the same applies to the auxiliary pulleys 4, 4a. Furthermore, there is no limitation on the size differences between the main pulleys 2, 2a, the guide pulleys 3, 3a, and the auxiliary pulleys 4, 4a. Furthermore, the induction pulleys 3, 3
The arrangement relationship of the auxiliary pulleys 4, 4a with respect to a is also not limited to the above. Further, a known wire-off prevention device may be attached to the main pulleys 2, 2a, the guide pulleys 3, 3a, and the auxiliary pulleys 4, 4a. Furthermore, the support frame 1 may be provided with wire guide means other than the above-mentioned pulley. Further, it is preferable that the shape and structure of the support frame 1 are appropriately selected depending on the application and usage conditions.

[Effect of invention]

<Usage Example 1> In FIGS. 4 and 5, which are a front view and a plan view, respectively, illustrating the usage state of the guide pulley stand for a wire saw according to the present invention, a guide pulley stand A is mounted on the upper wall surface of a reinforced concrete structure B. It is temporarily installed by anchoring the right side ear portion of the support frame 1.

On the other hand, a wire drive device C is installed on the left front road surface of the reinforced concrete structure B so as to be movable on a track 8. The wire drive device C includes a drive pulley 9 that is rotationally driven in a vertical plane and a pair of tension pulleys 10 and 11 arranged adjacent to the drive pulley 9.

A cutting wire 12 consisting of a large number of beads having a surface layer of diamond grains arranged in a row is wound horizontally around a part of the reinforced concrete structure B to be cut, guided by a guide pulley stand A, and driven by a tensioner in a wire drive device C. Shion pulley 10,1
1 and is hung endlessly on the drive pulley 9. In that case, on the guide pulley stand A, the tension side and loose side of the cutting wire 12 are connected to the main pulleys 2 and 2a along the virtual tangents L and M, respectively.
and the annular grooves 6, 6a of the guide pulleys 3, 3a, and further along the annular grooves 7, 7a of the auxiliary pulleys 4, 4a. You will be guided in an S-shape. In this case, the auxiliary pulleys 4, 4a stably hold the cutting wire 12 regardless of the direction in which it is disposed, and prevent the cutting wire 12 from coming off the annular grooves 6, 6a of the guide pulleys 3, 3a. are doing.

In the above configuration, when the drive pulley 9 is rotated while moving the wire drive device C toward the reinforced concrete structure B, the cutting wire 12 runs endlessly with the required tension and speed, and as a result, the wire drive device C moves toward the reinforced concrete structure B. will be completely severed. In that case, the cutting wire 12 runs in a vertical plane on the wire drive device C side due to the rotation plane of the drive pulley 9;
On the guide pulley stand A side, the imaginary tangents L and M run horizontally spread across the width of the imaginary tangents L and M.
By appropriately narrowing the width of the cutting wire 12 and appropriately selecting the distance between the reinforced concrete structure B and the wire driving device C, the above-mentioned opening or twisting between the tension side and the loose side of the cutting wire 12 can be kept to a minimum. Therefore, the smooth running of the cutting wire 12 may be hindered, or the annular groove side wall of the drive pulley 9 (detailed illustration is omitted).
will not be damaged or worn out.

<Usage Example 2> Next, in FIG. 6, which is a front view illustrating another usage state of the wire saw guide pulley stand according to the present invention, the wire drive device C described above is installed on the left front road surface of the reinforced concrete structure B. is installed movably on the track 8, and the aforementioned guide pulley stand A is placed on the road surface at an intermediate position between the main pulleys 2, 2.
The support frame 1 is temporarily installed by anchoring the upper side ears of the support frame 1 with the side a facing toward the reinforced concrete structure B.

The cutting wire 12 described above is wound horizontally around the part to be cut at the bottom of the reinforced concrete structure B, is guided by the guide pulley stand A in the same way as above, and runs inside the tension pulleys 10 and 11 in the wire drive device C. The cutting operation is carried out in the same manner as described above.

Note that this usage method is particularly suitable for cutting near the bottom of the object to be cut, for example when cutting and removing the center wall of an expressway or removing side walls.In this case, the use of the auxiliary pulleys 4 and 4a is It is essential.

<Usage Example 3> Furthermore, in FIG. 7, which is a front view illustrating another usage state of the guide pulley stand for a wire saw according to the present invention, the above-mentioned example is shown on the left front road surface of reinforced concrete structure B consisting of a floor and a vertical wall. A wire drive device C is installed so as to be movable on a track 8, and the above-mentioned guide pulley stand A is mounted on the vertical wall, with the main pulleys 2 and 2a facing toward the floor of the reinforced concrete structure B, and the upper surface of the support frame 1. It is temporarily installed by anchoring the side ear part.

The cutting wire 12 described above is wound vertically around the part to be cut on the floor of the reinforced concrete structure B, and is sequentially guided to the main pulleys 2, 2a and the guide pulleys 3, 3a of the guide pulley stand A in the same manner as above, The drive pulley 9 passes through the inside of the tension pulleys 10 and 11 in the wire drive device C.
The cutting operation is performed in the same manner as described above. In this usage method, there is no need to use the auxiliary pulleys 4, 4a.

Note that the above is only one example of how to use the guide pulley stand for a wire saw according to the present invention. For example, support frame 1 in guide pulley stand A
The mounting side is not limited to the above. Furthermore, the object to which the support frame 1 is attached is not limited to an object to be cut, such as the reinforced concrete structure B, or a road surface, but may be other fixed objects or movable objects as the case may be. Also,
The shape, structure, attachment mode, etc. of the support frame 1 can be selected as appropriate depending on the shape and structure of the object to which the support frame 1 is attached. Furthermore, the guide pulley stand A may be tilted or turned upside down.
Alternatively, it can also be used in combination with other wire guide means. Furthermore, the design of the guide pulley stand A can be appropriately changed or a different method of use can be adopted depending on the type of the wire drive device C used, the angle of the rotating surface of the drive pulley 9, and the like.

[Effect of idea]

As described above, the guide pulley stand for a wire saw according to the present invention can smoothly guide the tension side and loose side of the cutting wire at the same time without requiring any special adjustment by simply installing it at the required location. It can be turned in the desired direction.

Therefore, in partial cutting work using a wire saw, especially in partial cutting work of reinforced concrete structures, the object to be cut can be accurately cut regardless of the height of the cut point, and the installation of the guide pulley can cut the workpiece accurately on the ground and in the space. It can be suitably used even in places where there is not enough space.

In addition, since the wire saw guide pulley stand is equipped with an auxiliary pulley, it holds the cutting wire stably regardless of the direction in which it is installed, and prevents the cutting wire from slipping out of the annular groove of the guide pulley. are doing.

[Brief explanation of the drawing]

1, 2 and 3 are a front view, a top view and a left side view, respectively, of an example of a guide pulley stand for a wire saw according to the present invention, and FIGS.
The figures are a front view and a plan view, respectively, illustrating the usage state of the guide pulley stand for a wire saw according to the present invention, and FIGS. 6 and 7 show other usage states of the guide pulley stand for a wire saw according to the present invention. FIG. 6 is a front view of each example. Explanation of main symbols, A...Guide pulley stand, B
... Reinforced concrete structure, C ... Wire drive device, L, M ... Virtual tangent, 1 ... Support frame, 2, 2a ... Main pulley, 3, 3a ... Induction pulley, 4, 4a ... Auxiliary pulley, 5,5
a, 6, 6a, 7, 7a... annular groove, 8... raceway, 9... drive pulley, 12... cutting wire.

Claims (1)

[Claims for Utility Model Registration] 1. A support frame, a pair of main pulleys pivotably attached to the support frame adjacent to each other so as to be freely rotatable independently in the same plane, and adjacent to each other so as to be freely rotatable independently in a direction perpendicular to the main pulleys. a pair of guide pulleys pivotably mounted on the support frame, and a pair of auxiliary pulleys pivotably mounted on the support frame adjacent to each other so as to be rotatable independently in the same plane as the guide pulleys; A guide pulley stand for a wire saw, in which a pulley and a guide pulley are arranged so that virtual tangent lines parallel to each other passing through inner facing parts of an annular groove around the main pulley touch the annular groove around the guide pulley. 2. The guide pulley stand for a wire saw according to claim 1, wherein a pair of guide pulleys are arranged on the same axis. 3. The guide pulley stand for a wire saw according to claim 1, wherein a pair of auxiliary pulleys are arranged on the same axis. 4. The guide pulley stand for a wire saw according to claim 1, wherein the inner facing portion of the annular groove around the main pulley is the closest portion.