JP2890107B2 - Wire sawing method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diamond wire saw (hereinafter, also simply referred to as a wire saw) for dismantling various concrete structures whose base portions are underwater (not limited to those underwater). ) Belongs to the field of demolition or removal technology of concrete structures and the like for cutting concrete structures and the like.

[0002]

2. Description of the Related Art As an example, in order to disassemble a concrete structure in water, it is not always necessary to dispose the concrete structure in water.
A pulley 28 around which a diamond wire saw 16 is wound is mounted so as to be rotatable by a motor, and a pair of guide rollers 29 and 30 is provided below the dry sealed chamber 27 with a pair of guide rollers 29 and 30 from the lower end 31 of the dry sealed chamber 27. The moving roller 32 at the lower part of the dry sealed chamber 27 is mounted on the rail 34 of the mounting base 33, and is extended by extending the piston 36 of the hydraulic cylinder 35 of the mounting base 33. The closed chamber 27 is moved rearward (to the left in FIG. 6) so that the endless wire saw 16 wound around the cutting object 37 can be rotated and towed at the same time.

On the peripheral surface of the wire saw 16 engaged with the pulley 28, usually, as shown in FIGS. 5A and 5B, artificial diamond fine grains 38 having a diameter and a length of 10 m are provided.
m, a diamond bead 41 adhered to the surface of a cylindrical steel material 40 having a wire insertion hole 39 at its center,
Diameter is almost the same as diamond beads 41 and length is 20
A diamond wire saw 16 formed by alternately bonding plastic spacers 43 having a wire insertion hole 42 at the center thereof and having a diameter of about mm is wound.

[0004] An object to be cut 3 such as a concrete pillar which is underwater
In order to cut the wire saw 7, the other end of the endless wire saw 16 having one end engaged with the pulley 28 is wound around an object 37, and the pulley 28 is pulled by a hydraulic cylinder 35 while being rotated by a motor. The other end of the rotating member 16 contacts and rotates with the object 37, and cuts the corner portion 45 as shown by a broken line 44 while grinding the object 37 such as a concrete column, and further towing by the hydraulic cylinder 35. As shown by a chain line 46, an object 37 such as a concrete pillar is gradually cut (see Japanese Patent Application Laid-Open No. 7-150775).

[0005]

As described above, when the wire saw 16 is wound around a concrete structure and pulled to cut a concrete pillar or the like by the wire saw 16, the distance between the pulley 28 and the cut point becomes smaller. When the wire saw 16 fluctuates due to the external shape of the object, the wire saw 16 is suddenly subjected to a large load to damage the electric motor, the wire saw 16 runs idle, or as the radius of curvature of the wire saw 16 gradually decreases, the diamond becomes smaller. When the beads 41 crush the spacer 43 and the diamond beads 41 come into contact with each other to damage the diamond beads 41, it is difficult to perform a smooth cutting operation. If so, use a diamond wire saw 16 to cut it. If, because the action that is performed at the time of sliding the wire saw is grinding action without developing cutting action against the wood, simply has a disadvantage that it is impossible to cut the wood pillar simply runs idle.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks, maintains the contact angle between a wire saw and an object to be cut, such as a concrete pillar, even when the cutting operation proceeds.
The radius of curvature of the diamond wire saw is not smaller than a right angle. <br/> This prevents breakage of the diamond wire saw and enables a smooth cutting operation. It is an object of the present invention to provide a method and an apparatus for cutting a concrete pillar, which can easily cut a lumbered pillar.

[0007]

In order to solve the above-mentioned problems, the present invention provides a diamond bead and a spacer.
Endless diamonds alternately inserted through the wire
The entire wire saw rotates in a horizontal rectangle
So that only the front end that contacts the workpiece is horizontal.
While traveling so as to perform a cutting action in a straight line
The straight part moves forward with respect to the workpiece.
Yarn sewing method diamond beads and spacers
And form a horizontal rectangle that is inserted alternately through the wire
Cutting the front end of an endless diamond wire saw
Invite the part that comes into contact with the object to be straight in the horizontal direction.
Guide the rear end of the rectangular wire saw on a vertical surface.
To the rotating main pulley,
Rotate the entire wireless saw into a horizontal rectangle
The linear part moves against the workpiece while running
Sawing method so as to advance the addition
Instead of diamond wire saw
A wire saw using a wire saw with striated projections
The front end of the frame with the front end of the rectangle removed
Wiring diamond beads and spacers on both sides alternately
Endless diamond wire saw
Guide rollers to guide the
On both sides of the end, the rear end of the wire saw is
Main pulley driven vertically in the upper part of the frame
Provide guide rollers to guide the endless wire
-A saw is provided so that it can rotate and the frame is moved by a moving device.
Wire sawing device moving forward
Has a chain wheel at the front and rear ends of the rail to
Rotate the dress chain to frame the endless chain
The wire saw in which the engaging legs are engaged
Woodworking file-like projections were formed on the entire surface of the steel bar
Wire alternately with beads and plastic spacers
In this case, a wire saw penetrating through the wire is used, or means of a wire sawing device is used.

[0008]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a rail 2 (in this case, a monorail is used, but a plurality of rails may be mounted) on a mounting table 1 having an appropriate height,
As shown in FIG. 2, both sides of the rail 2 are sandwiched by elastic wheels 3, and running wheels 4 are mounted so as to be able to run below both sides thereof, and a chain wheel 5 is attached to the front and rear ends of the rail 2. A drive air (or electric motor) 6 is provided on the rear chain wheel 5 (see FIG. 1), and the chain 7 is engaged with the chain wheel 5 to constitute a moving device 8 as a whole. Above the moving device 8, there is provided a frame body 9 from which a rectangular front end (left side in FIG. 1) is removed.
The details are as follows. The leg 4 a of the traveling wheel 4 is provided behind the frame 9.
A base 11 having an engaging leg 10 (see FIG. 2) is provided at the center of the lower surface of the rear connecting frame 9a. The engaging leg 10 engages with the chain 7 and moves integrally with the chain 7. A main pulley 13 that is rotated by a hydraulic (or electric) motor 12 is attached to the upper center of the base 11. The motor 12 and the main pulley 13 are connected to the dry chamber 1 by a closed box 14.
5.

In FIG. 3, guide rollers 17 for engaging and guiding the diamond wire saw 16 are provided on both sides in front of the frame 9 (left side in FIG. 3) in a plane.
Shortly thereafter, a vertical guide roller 18 is provided, and at the rear end (right end in FIG. 3) of the frame 9, one vertical guide roller 19 is directed from its lower surface to the upper main pulley 13. The wire saw 16 is further guided to the lower surface of the other vertically oriented guide roller 19 by making a half turn around the upper portion of the main pulley 13.
Is engaged with each of the guide rollers 17, 18, 19 and the main pulley 13 and is endlessly stretched as a whole. The spring 20 (see FIG. Wire saw 1
Tension is applied so that 6 forms a straight line.

When cutting a normal concrete column 21, a diamond wire saw 16 as shown in FIG.
When wood such as pine is driven into the lower end of the concrete column 21 as a foundation pile at the center, a wire saw 16a as shown in FIG. 4 is used. That is, as shown in FIG. 4 (B), a woodworking file-like projection (a sawed shape may be used on the entire surface of the steel bar 22 having a diameter of about 10 mm. (Hereinafter referred to as 23), and a bead 24 cut to a length of about 10 mm and a plastic spacer 25 having the same diameter as the bead 24 and a length of about 20 mm are alternately inserted into a wire 26 and used. To do.

[0011] describes a method of cutting the concrete angle pillar built in the water. 3, a two-dot chain line
The mount 1 shown in FIG. 1 in the vicinity of the concrete angle pole shown assembled and the chain 7 of the rail 2 on the mounting base 1 is rotated to advance the frame 9 in front (left), the inside of the frame 9 the wire saw 16 is stretched front linearly by a spring 20 provided on the endless so as to be in contact with the concrete angle pillars, the chain wheel 5 at the rear end of the rail 2 and at the same time rotating the main pulley 13 in this state the chain 7 is advanced by rotating, while rotating the diamond wire saw 16 is pressed against the concrete angle pillars, making a groove in the concrete by the width of the diameter of the wire saw by grinding action of the diamond wire saw 16,
It is capable of cleaving a progressively deeper to the concrete angle pole depth of <br/> groove hatched two-dot chain line by continuing this operation.

During this operation, the concrete corner
Since the wire saw 16 in contact with the pillar keeps a straight line,
Without changing the distance between the cutting point and the pulley 13, such as those for winding the wire saw 16 in a conventional disconnect object 37, thus it takes sudden large load to the wire saw 16, a wire saw Because the wire saw 16 does not run idle and the wire saw 16, which is a horizontal rectangle, is not bent less than a right angle ,
The diamond beads 41 do not crush the spacer 43, and the diamond beads 41 do not come into contact with each other to break them and impair a smooth cutting operation.

Next, in order to cut a concrete pillar into which wood such as pine has been driven as a base pile at the lower end thereof, the diamond wire saw 16 is removed from the inside of the frame body 9 and a woodwork file is formed. A wire saw 16a, in which beads 24 and plastic spacers 25 formed on the entire surface are alternately passed through a wire 26, is linearly mounted on the entire surface of the frame 9, and the wire saw 16a is rotated and cut at the same time. By pressing against an object, a wood pillar such as a pine can be quickly cut by a cutting action by a woodworking file-like projection different from the grinding action of the diamond wire saw 16.

[0014]

According to the conventional wire saw, since the length of the wire saw changes depending on the shape of an object to be cut, a heavy load is applied to the wire saw, the electric motor is damaged, and the wire saw runs idle. Or, as the radius of curvature of the wire saw becomes smaller, the diamond beads crush the spacers and break the diamond beads, making it difficult to perform a smooth cutting operation. Although If it is implanted has a disadvantage that it is impossible for practical use can not be performed cutting action, claim 1, wherein
Claim 2, the invention of claim 4, and claim 5, it is rather name that the length of the wire saw is changed, since the radius of curvature of the wire saw does not become smaller than a right angle, no conventional to various disadvantages According to the third and sixth aspects of the present invention, the wooden pillar can be cut at a high speed because there is no conventional disadvantage.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a case where the present invention is implemented.

FIG. 2 is an enlarged side view of a part of FIG.

FIG. 3 is a plan view showing the arrangement of the wire saw of the present invention.

FIG. 4A is a front view of a novel wire saw of the present invention, and FIG. 4B is an enlarged sectional view of a part thereof.

FIG. 5A is a front view showing a conventional wire saw, and FIG. 5B is an enlarged sectional view of a part thereof.

FIG. 6 is a front view showing an outline of a conventional wire sawing concrete cutting device.

[Explanation of symbols]

 2 Rail 5 Chain wheel 7 Endless chain 8 Moving device 9 Frame 10 Engagement leg 13 Main pulley 16 Diamond wire saw 16a Wire saw 22 Steel bar 23 Woodworking file-like projection 24 Bead 25 Plastic spacer 26 Wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 23/08 B28D 1/08

Claims (6)

(57) [Claims] 1. A diamond bead (41) and a spacer.
Whole water over (43) ene <br/> dress the diamond wire saw inserted through the wire (26) alternately and (16)
The linear portion is rotated while forming a rectangular in the horizontal direction so that only the front end contacting the object to be cut (21) forms a straight line in the horizontal direction and performs a cutting action.
A wire sawing method for moving forward with respect to an object to be cut (21) . 2. A diamond bead (41) and a spacer.
-(43) and alternately inserted through the wire (26)
The portion of the front end of the endless diamond wire saw (16) forming a rectangular shape in contact with the workpiece (21) is guided so as to be linear in the horizontal direction, and the rectangular shape is obtained.
Of the rear end of the wire saw (16) on a vertical plane
To the drive main pulley (13)
The whole wireless saw (16) is rectangular in the horizontal direction
The linear part is cut while the workpiece is rotated.
Sawing method so as to advance to (21). 3. A wire sawing method using a wire saw (16a) having a woodworking file-like projection (23) formed on the surface thereof instead of the diamond wire saw (16) according to claim 1 or 2 . 4. A frame (9) having a rectangular front end removed.
Diamond beads (41) and spacers on both sides of front end
(43) and an endless diamond wire saw (16) alternately inserted through a wire (26) in the horizontal direction.
A guide roller (17) for guiding linearly is provided, and a rear end
On both sides, frame the rear end of the wire saw (16)
(9) Vertically above the rear connecting frame (9a)
Guide row leading to the driven main pulley (13)
La (19) is provided and an endless wire saw (1
It provided 6) rotatably driving, sawing apparatus adapted to advance by the mobile device (8) the frame (9). 5. A moving device (8) provided with a chain wheel (5) at front and rear ends of a rail (2) to rotate an endless chain (7), and a frame (9) is attached to the endless chain (7). The wire sawing device according to claim 4 , wherein the engaging legs (10) are engaged. 6. A wire saw (16a) in which beads (24) having woodworking file-like projections (23) formed on the entire surface of a steel bar (22) and plastic spacers (25) are alternately inserted through a wire (26). Claim 4 using
Is the wire sawing device according to claim 5 .