JPH03175007A - Guide device for use in cutting and boring concrete wall - Google Patents

Abstract

PURPOSE:To shorten a wire and cut a wall as far as a required position by providing a screw rod, rotary drive motor, sleeve in threaded engagement with the screw rod, fixed pulley and movable pulley attached to the sleeve. CONSTITUTION:A guide device 10 comprises screw rods 14 having an end on which a bearing member 12 is mounted through a bearing, drive motors 16, sleeves 18, with their opposite ends being opened, in threaded engagement with the rods 14, fixed pulleys 22 detachably mounted on mounting members 20 and movable pulley 24 detachably attached to the sleeves 18. A cutting wire 30 passes around the pulleys 22, 24. Since the wire is not reversed at one pulley, breaking thereof is prevented. For forming a cut line between holes 26a - d, the movable pulleys 24 are moved in the axial direction of the screw rods 14 through the sleeves 18 to cut concrete, so that the length of the wire can be made shorter. And since the wire 30 and pulleys 24 are placed at approxi mately the same position, cutting can be performed as far as a required position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a guide device used for cutting or forming openings in a concrete wall.

(Prior art) As is well known, cutting methods for concrete walls include:
The concrete cutter that rotates the saw blade also
As a construction method for forming an opening in a concrete wall, the above-mentioned cutter, core drill, etc. are used.

However, various disadvantages have been pointed out in such cutting and opening forming methods due to the limited cutting depth.

Therefore, Japanese Unexamined Patent Publication No. 112108/1983 discloses a method for cutting and opening concrete walls using a wire saw, which solves the above-mentioned problems.

The cutting and opening method disclosed in this publication uses a diamond wire that rotates around the concrete wall, and a hole is drilled at the location where the concrete wall is to be cut or opened, and a pulley that is inserted into the hole is attached. A method using a guide device consisting of a support shaft, in which the wire is hooked onto each pulley and wound in an inverted manner within the hole.

According to this construction method, unlike a concrete cutter, the cutting depth is not limited, so workability is improved, but there are also technical problems particularly with the guide device, which will be explained below.

(Problems to be Solved by the Invention) In other words, in the guide device disclosed in the above publication, the diamond wire is wound around the pulley so as to be reversed within the hole, so the required length of the diamond wire becomes long. However, since this wire is quite expensive, there is a problem in that the construction cost is high.

In addition, the wire is hung on a pulley that is inserted into the hole and then turned over, but since the radius of curvature of the pulley is small, there is a problem that it is easy to break at this part when tension is applied to the wire. Ta.

Furthermore, in the guide device disclosed in the above-mentioned publication, the position of the pulley in the hole and the cutting position of the wall body are different, so there is also the problem that it is difficult to cut accurately to the required position.

This invention was made in view of these conventional problems, and its purpose is to shorten the length of the wire required for cutting, to make the wire less likely to be cut, and to shorten the length of the wire required for cutting. It is an object of the present invention to provide a guide device used for cutting a concrete wall or forming an opening, which can cut accurately to a certain position.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a guide device used for guiding a cutting wire when forming a cutting line or an opening in a concrete wall by a wire saw method. , a threaded rod pushed into a hole drilled in the concrete wall, a rotary drive motor provided at one end of the threaded rod, a sleeve threaded onto the threaded rod, and a fixed pulley attached to the threaded rod. and a moving pulley attached to the sleeve.

(Operations and Effects of the Invention) According to the guide device configured as described above, the cutting wire is wound between the fixed threaded rod and the movable pulley, and there is no part that is reversed by one pulley, so cutting of the wire is prevented, and When forming cutting lines between holes, the moving pulley moves in the axial direction of the threaded rod through the sleeve, cutting the concrete between the holes, which reduces the required length of wire. .

Further, during this cutting, the wire and the movable pulley are at approximately the same position, so it is possible to accurately cut to the desired position.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a guide device 10 used for cutting or forming openings in a concrete wall according to the present invention.

The guide device 10 includes a threaded rod 14 having a bearing member 12 attached to the tip via a bearing, a drive motor 16 coaxially installed at the rear end of the threaded rod 14, and a sleeve with both ends open and screwed onto the threaded rod 14. 18, and a mounting member 20 provided between the sleeve 18 and the motor 16.
A fixed pulley 22 removably installed on the sleeve 1
8 and a movable pulley 24 removably installed.

The rotation axes of the fixed pulley 22 and the movable pulley 24 are as follows:
They are provided in a direction perpendicular to the axis of the threaded rod 12b so that their mutual rotation surfaces are substantially on the same plane.

In the guide device 10 configured in this way, when the drive motor 16 is driven, the threaded rod 14 rotates and the sleeve 18 moves in its axial direction, so the movable pulley 24
It moves in a direction away from or close to the fixed pulley 22.

A method of using the guide device 10 having the above configuration will be explained.

2 and 3 show an example of use in which a plurality of the guide devices 10 described above are used to form an opening in a concrete wall C. FIG.

To form the opening in the concrete wall C, first
As shown in Figure (A), a hole 26 is bored to a predetermined depth at the end of the location A where the opening is to be formed.

In this usage example, since a substantially rectangular opening is formed in the concrete wall C, the holes 26 are placed at four locations ( 26a
-d) provided.

Once the holes 26a-d are formed, a pair of guide devices 10 are inserted into adjacent holes, for example 26a and 26b, as shown in FIG. 2(C).

The guide device 10 has a movable pulley 24 that is connected to a fixed pulley 2.
When the threaded rod 14 is located on the second side, the threaded rod 14 is inserted into the holes 26a, b.
The bearing member 12 is seated on the bottom surface of each hole 26a,b.

The connecting plates 28 are respectively attached to the 22 fixed pulleys and the 24 moving pulleys in a state that does not interfere with their rotation, thereby stabilizing the guide device 10 and preventing the moving pulleys 24 from rotating together.

When the installation of the guide device 10 is completed, a cutting wire 30 for cutting concrete made of diamond wire is attached.

The cutting wire 30 is in an endless state, and the wire 30 is
Drive pulley 32a of the cutting device 32 configured to be movable
It is wound in order from the pair of fixed pulleys 22 to the movable pulley 24 of the same pair, and is circulated via a guide pulley 34 installed near one of the holes 26a.

In this state, the cutting device 32 is moved to apply a predetermined tension to the cutting wire 30, and the driving pulley 32a is rotationally driven to rotate the cutting wire 30.

At this time, the drive motor 16 of each guide device 10 is started, and each movable pulley 24 is in almost the same state, and the fixed pulley 22 is
Make sure to keep it away from.

By continuing such operations, as shown in FIG. 2(D), when the movable pulley 24 reaches the bottom of each hole 26a, b, the cutting wire 30 cuts the concrete wall between the holes 26a, b. The body C is cut to form a linear groove between the holes 26a and 26b.

Then, by repeating the above operation, Fig. 2 (E)
As shown in FIG. 3, contour grooves 36 are formed as openings that linearly connect the holes 26 a to 26 d.

Once the contour groove 36 has been formed, the guide devices 10 are then inserted into the holes 26a-d, respectively, as shown in FIG.

The guide device 10 used at this time includes a fixed pulley 22
All of the pulleys 24 inserted into the holes 26b and 26c are also removed.

Note that in this usage example, the fixed or movable pulley 22.
．． Although the case is shown in which the pulleys 22 and 24 are used after being removed, it is not necessarily necessary to remove them as long as the pulleys 22 and 24 are oriented in a direction that does not interfere with work.

Next, the cutting wire 30 is wound between the movable pulleys 24 inserted into the holes 26a and 26d, but at this time, the remaining two guide devices 10 have a wire that is removably locked in the sleeve 18 of the remaining two guide devices 10, and , as shown in FIG. 3(B), the contour groove 3
The cutting wire 30 is arranged along the shape of the groove except for one side on which the cutting device 32 of No. 6 is installed, and the cutting wire 30 is endless as described above, and rotates in a horizontal plane via the guide pulley 20. It is wound around the drive pulley 32a' of the cutting device 32' to be driven.

In this way, the guide device 10 and the cutting device 32'
is installed and winding of the cutting wire 30 is completed, first, the drive motor 16 of each guide device @10 is started, and the third
As shown in Figure (C), the sleeve 18. Moving pulley 24
is moved to the bottom of holes 26a-d.

Then, in this state, the engagement between the sleeve 18 inserted into the holes 26b and 26c and the cutting wire 30 is released, and the released guide device 10 is pulled up to the ground and removed.

Next, the driving pulley 32' is rotated while the cutting device 32' is moved to apply tension to the cutting wire 30, and the cutting wire 30 is rotated, thereby forming a contour groove as shown in FIG. 3(C). When the concrete wall C between 36 and 36 is gradually cut and the horizontal cutting line reaches the contour groove 36 on the side of the cutting device 32, the concrete at the location A where the opening is planned to be formed is separated, and by removing it, The desired opening is formed.

In addition, in the above process, for example, when the depth of the opening to be formed is large and it cannot be removed at once, the process shown in FIG. 3 (C
), the sleeve 18 of the guide device 10 is shown in dotted lines.
It is also possible to stop the movement in the depth direction at an appropriate location and divide the horizontal cutting line into multiple steps.

Now, in the guide device 10 used for forming an opening in the wire saw construction method performed in the above steps, the cutting wire 16 is wound between the fixing and/or movable pulleys 22 and 24 of the threaded rod 14, and the cutting wire 16 is wound by one pulley. Since there is no part that turns over, cutting is prevented, and when forming a cutting line between the holes 26a-d, the movable pulley 24 moves in the axial direction of the threaded rod 14 via the sleeve 18, thereby cutting the hole. Since the concrete between portions 26a to 26d is cut, the required length of the wire is shortened.

Further, during this cutting, the wire 16 and the movable pulley 24 are at approximately the same position, so that the cutting can be performed accurately to the desired position.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a guide device according to the present invention, and FIG.
This figure and FIG. 3 are process explanatory diagrams in the case of forming an opening using the guide device shown in FIG. 1. 10......Guide device 14.
・・・・・・・・・・・・Threaded rod 18・・・・・・・・・
......Sleeve 22...Fixed pulley 24...Moving pulley 26a
-d...hole

Claims (1)

[Claims] A guide device used to guide a cutting wire when forming a cutting line or an opening in a concrete wall using the wire saw method includes a threaded rod inserted into a hole drilled in the concrete wall, and this threaded rod. A concrete wall body comprising a rotary drive motor provided at one end, a sleeve threaded onto the threaded rod, a fixed pulley mounted on the threaded rod, and a movable pulley mounted on the sleeve. Guide device used for cutting or opening.