JPH084256Y2 - Equipment for cutting concrete bodies buried in the ground - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for crushing concrete bodies such as resin manholes buried underground.

[0002]

2. Description of the Related Art Telephone lines, optical fiber cables, etc. buried in the ground are connected / branched in a resin manhole at predetermined intervals (about 250 m). The resin manhole consists of a box-shaped concrete body with a reinforcing bar and a thickness of 5 to 8 cm, and accommodates the connection branch of the cable inside.

In recent years, as the demand for cables has increased, the capacity of resin manholes has become insufficient, and there are many examples in which existing manholes are crushed and removed to provide large-capacity manholes. At this time, the soil around the buried resin manhole was removed, and the exposed resin manhole was crushed and removed by a worker with a concrete breaker (rock drill).

[0004]

However, since the compressive strength of resin concrete is about 5 times as high as that of cement concrete, the method of crushing with a concrete breaker is very inefficient. In addition, the noise generated by the breaker has become a problem as construction pollution. Furthermore, the tip of the breaker may damage the cable in the manhole during crushing.

On the other hand, such work is performed from the standpoint of the worker.
The work environment is extremely poor due to breaker operation of about 10 to 15 kg, noise, vibration, and dust scattering.

An object of the present invention, which was devised in view of the above circumstances, is to provide a device capable of efficiently and quietly crushing a concrete body such as a resin manhole in a good working environment.

[0007]

According to one aspect of the present invention in order to achieve the above object, there is provided an apparatus for cutting a concrete bodies such as resin manhole embedded in the ground, rotatable downward traveling member traveling on the ground an arm provided, provided via a universal joint to the distal end of the arm, the box elongated into contact with the concrete body sediment is exposed is removed
And is housed in the box and moves in its longitudinal direction
The rotary cutter that emerges from the box and the box above
Rotating cutter without touching the box body
And a control device for driving the .

Further, the control device may be a switching mechanism for selectively switching between driving the rotary cutter and driving the universal joint.

[0009]

[Operation] The concrete body exposed by removing the earth and sand is cut and destroyed as follows. First, the arm of the traveling body is rotated downward, and one side surface of the elongated box body provided at the tip end portion thereof via the universal joint is brought into contact with the concrete body. At this time, by appropriately moving the universal joint, the box body can be brought into contact with the concrete body at various angles . In this way, contact the box with the concrete
After that, the controller will rotate the cutter without moving the box.
To drive. After that, the driven rotary cutter is installed in an elongated box.
Move along the longitudinal direction of the body and cut the concrete body
I do. In this way, move the box when driving the rotary cutter.
Since the box is not moved, it is caused by the movement of the box during cutting.
The rotary cutter is prevented from cracking.

A switching mechanism for selectively switching between the drive of the rotary cutter and the drive of the universal joint in the control device.
With this configuration , the universal joint does not move while the rotary cutter is driven, and the box body is fixed in position. Therefore, it is possible to prevent the breakage of the cutter caused by the movement of the universal joint with the rotary cutter biting into the concrete body.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, an arm 2 is attached to a traveling body 1 traveling on the ground. The arm 2 includes a V-shaped first arm 2a attached to the traveling body 1,
The linear second arm 2 attached to the first arm 2a
b, and the arms 2a and 2b are pivoted in the vertical direction while being articulated by the cylinders 3, 4 and 5. A bracket 7 is attached to the tip of the second arm 2b via a link mechanism 6, and the bracket 7 is rotated by a cylinder 5 around its attachment point 8. An elongated box body 10 is attached to the bracket 7 via a universal joint 9 (flexible joint mechanism), as shown in FIG. 1 (b). The details are shown in FIG.

As shown in the figure, a first shaft 11 is projected and fixed to the lower surface of the bracket 7, and a rotary frame 12 is rotatably provided on the shaft 11. A large diameter gear 13 is fixed to the first shaft 11, and the large diameter gear 13 meshes with a small diameter gear 14. The small-diameter gear 14 is attached to a first hydraulic motor 15 provided on the rotating frame 12. According to this configuration, by driving the first hydraulic motor 15, the small diameter gear 14 revolves around the large diameter gear 13 and the rotary frame 12 rotates around the first shaft 11.

A second shaft 16 is provided on the side surface of the rotating frame 12.
Is projected and fixed, and the elongated box body 10 described above is rotatably provided on the shaft 16 via an A-shaped member 17. A large diameter gear 18 is fixed to the second shaft 16, and the large diameter gear 18 meshes with a small diameter gear 19. The small-diameter gear 19 is a second hydraulic motor 20 provided on the upper surface of the box body 10.
Attached to. According to this configuration, by driving the second hydraulic motor 20, the small diameter gear 19 revolves around the large diameter gear 18, and the box body 10 rotates around the second shaft 16. In addition, the A type material 17 is the box 10
Attached to the end of.

As shown in FIG. 3, the box body 10 is composed of an outer box 21 that defines the outer shape of the box body and an inner box 22 housed inside the outer box 21. The inner box 22 has an engaging claw 24 that engages with a guide rail 23 provided on the inner surface of the outer box 21 in the longitudinal direction.
And is movable in the outer box 21 in the longitudinal direction. The engaging claws 24 are formed in a shape that bites the guide rails 23 and do not fall off even when the box body 10 is turned upside down.

A first rotary screw rod 25 is provided in the outer box 21 along the longitudinal direction. This first rotating screw rod 25
A nut member 26 attached to the inner box 22 is screwed into the. According to this configuration, by rotating the first rotating screw rod 25 by the electric motor 27, the nut member 2
6 is screw-fed, and the inner box 22 moves in the outer box 21 in the longitudinal direction.

A rotary cutter 28 is housed inside the inner box 22 so as to be retractable. The rotary cutter 28 is the inner box 22.
A V-belt (not shown) is attached to a support frame 29 provided inside by a third hydraulic motor 30.
It is rotationally driven via. The support frame 29 has one end 29a pivotally supported by a bracket 31 in the inner box 22,
The other end 29b can be pressed by the pressing mechanism 32 and rotates about the pivot shaft (one end 29a). The pressing mechanism 32 includes a second rotating screw rod 33 provided in the inner box 22 in the longitudinal direction, a nut body 34 screwed to the second rotating screw rod 33, the other end portion of the nut body 34 and the support frame 29. Two
9b, and a link plate 35 that links 9b.

According to this structure, when the second rotary screw rod 33 is rotated by the electric motor 36, the nut member 34 is rotated.
Are screw-fed, and the link plate 35 is attached to the support frame 2
The other end 29b of 9 is pushed out, the support frame 29 is rotated around the pivot 29a, and the rotary cutter 28 is moved to the box 10.
It projects from (the inner box 22 and the outer box 21). A window 37 for opening the rotary cutter 28 is opened in the inner box 22 and the outer box 21. Here, even if the rotation speed of the second rotary screw rod 33 is constant due to the link relationship between the pivot shaft 29a which is the rotation center of the support frame 29 and the input point of the link plate 35, the protruding speed of the rotary cutter 28 is , The beginning is fast, and it gradually becomes late as it approaches the end.

A nozzle 38 for injecting cooling water toward the rotary cutter 28 is provided in the inner box 22.
The nozzle 38 is attached to a metal bellows tube 39, and its direction is adjustable.

As shown in FIG. 1, the third hydraulic motor 30 for the rotary cutter 28, the first hydraulic motor 15 provided on the rotary frame 12, and the second hydraulic motor provided on the upper surface of the box body 10. 20 and the third hydraulic line 4 respectively
0, the first oil line 41, and the second hydraulic line 42 are connected. The first and second hydraulic lines 41, 42 are gathered together, and the gathering line 43 and the third hydraulic line 40 can be selectively switched by a changeover mechanism 44 (changeover switch) . According to this configuration, by operating the changeover switch 44 from the driver's seat 1a of the traveling body 1, the drive of the rotary cutter 28 and the drive of the rotary frame 12 are selectively switched to drive the rotary cutter 28. The rotating frame 12 does not move therein, and the rotating cutter 28 does not rotate while the rotating frame 12 is moving. That is, the changeover switch 44 has the box 10
Move the box body 10 after it is contacted with the concrete body 45.
A control device for driving the rotary cutter 28 (practically
Corresponding to the new model registration request).

The operation of this embodiment having the above configuration will be described.

As shown in FIG. 1, the box-shaped concrete body 45 (resin manhole) exposed by removing the earth and sand is cut and destroyed as follows.

First, the cylinders 3, 4, 5 are appropriately expanded and contracted to rotate the arm 2 of the traveling body 1 downward, and the elongated box body 10 provided at the tip end thereof via the bracket 7 and the rotating frame 12. The surface of the cutter that appears and comes into contact with the concrete body 45. At this time, by rotating the bracket 7 on the rotary frame 12 around the attachment point 8 by the cylinder 5, the cutter projecting / retracting surface of the box body 10 can be brought into contact with an arbitrary surface of the concrete body 45. Also,
A first hydraulic motor 15 provided on the rotating frame 12,
By appropriately driving the second hydraulic motor 20 provided on the upper surface of the box body 10, the degree of freedom of movement of the box body 10 is further expanded, and the cutter projecting / retracting surface of the box body 10 can be varied with respect to the concrete body 45. The contact can be made at an angle (see the alternate long and short dash line in FIG. 1).

At this time, the changeover switch 44 is arranged on the side of the collecting line 43 (first and second hydraulic lines 4) as shown by a broken line in the figure.
1, 42 side). Therefore, the hydraulic pressure from the traveling body 1 is never supplied to the third hydraulic line 40 during the movement of the rotary frame 12, and the rotary cutter 28
Does not rotate. Therefore, the safety is high.

Thereafter, the changeover switch 44 is connected to the third hydraulic line 40 as shown by the solid line in the figure, and the rotary cutter 28 is driven by the third hydraulic motor 30. Then, while the rotary cutter 28 is projected by the electric motor 36 in the box body 10, the inner box 22 is moved to the outer box 21 by the electric motor 27.
To move against. Then, as shown in FIG. 1 (b), the rotary cutter 28 moves in the longitudinal direction of the box body 10 while biting into the concrete body 45.
5 is cut. In other words, the rotary cutter 28 is a box-shaped resin manhole 4 having a relatively thin plate thickness (5 to 8 cm).
5 is cut in by the protruding amount, and the reinforcing material within the plate thickness is cut.

According to this construction method, even resin concrete (resin manhole 45) having a compressive strength about five times stronger than that of cement concrete can be cut and destroyed reasonably and efficiently. Further, since the amount of protrusion of the rotary cutter 28 is limited, the cable inside the resin manhole 45 is not damaged. Alternatively, the cutter 28 may be made to have a shallow biting depth to form a groove on the surface of the resin manhole 45, and a wedge may be driven into the groove for crushing.

During this cutting, since the changeover switch 44 is connected to the third hydraulic pressure line 40 side during the operation of the rotary cutter 28, the hydraulic pressure from the traveling body 1 is never collected during the rotation of the rotary cutter 28. Side (first and second hydraulic lines 4
1, 42 side), the rotary frame 1
2, that is, the box body 10 does not move. Therefore, it is possible to prevent the breakage of the cutter 28 caused by the movement of the box body 10 while the rotary cutter 28 bites into the resin manhole 45. It is needless to say that the cylinders 3, 4, 5 of the first and second arms 2a, 2b are fixed during the rotation of the rotary cutter 28.

As described above, since the resin manhole 45 is cut and destroyed by the rotary cutter 28, noise is remarkably reduced as compared with the conventional method of crushing with a concrete breaker. Further, according to the present embodiment, the worker operates the rotary cutter 28 from the driver's seat 1a of the traveling body 1, so that the working environment becomes much better than the conventional construction method in which the concrete breaker was directly operated. .

Further, since noise generated from the rotary cutter 28 at the time of cutting is attenuated by the double box structure of the inner box 22 and the outer box 21, the noise is further reduced. The chips generated by the cutting are washed away by the cooling water from the nozzle 38 provided facing the contact portion between the rotary cutter 28 and the resin manhole 45. Further, vibration generated by receiving a reaction force from the resin manhole 45 at the time of cutting the rotary cutter 28 is damped by the V belt between the rotary cutter 28 and the third hydraulic motor 30. Further, the projecting speed of the rotary cutter 28 starts fast and gradually slows down due to the link structure of the pressing mechanism 32, and therefore gradually slows as the contact area (cutting area) of the rotary cutter 28 to the resin manhole 45 increases. It can be said that it is a preferable characteristic.

In this embodiment, the backhoe is used as it is for the traveling body 1 and the first and second arms 2a and 2b, the backhoe bucket attached to the tip of the second arm 2b is removed, and the backhoe is placed there. Since the bracket 7, the rotary frame 12 and the box body 10 are provided, it can be manufactured at low cost.

[0031]

As described above, according to the present invention ,
Such an excellent effect can be exhibited. (1) Concrete bodies such as resin manholes can be crushed efficiently and quietly in a good working environment. (2) After contacting the box body with the concrete body,
I try to drive the rotary cutter without moving the body
Therefore, the rotary cutter can be prevented from cracking and damage.

[Brief description of drawings]

FIG. 1 is an explanatory view of a cutting device showing an embodiment of the present invention, (a) is a side view and (b) is a top view of a box portion.

FIG. 2 is a view showing a bracket and a rotating frame which constitute the universal joint of the cutting device of FIG. 1, (a) is a front view,
(b) is a side view.

3 is a diagram showing the inside of the box of the cutting device of FIG. 1,
(a) is a side sectional view, (b) is a horizontal sectional view, and (c) is a lateral sectional view.

[Explanation of symbols]

1 Traveling Body 9 Universal Joint 10 Box 15, 20 First and Second Hydraulic Motors for Driving Universal Joint 28 Rotating Cutter 30 Third Hydraulic Motor for Driving Rotary Cutter 44 Switching Mechanism as Controller 45 Resin Manhole as Concrete Body

Claims (2)

[Scope of utility model registration request] 1. A device for cutting the concrete body such as resin manhole embedded in the ground, the arm provided rotatably downward traveling member traveling on the ground, a universal joint to the distal end of the arm A slender box body that is installed via the earth and sand and comes into contact with the exposed concrete body.
And is housed in the box and moves in its longitudinal direction
The rotary cutter that emerges from the box and the box above
Rotating cutter without touching the box body
A device for cutting a concrete body buried in the ground, which has a control device for driving the . 2. The cutting device for a concrete body buried in the ground according to claim 1 , wherein the control device is a switching mechanism that selectively switches between driving the rotary cutter and driving the universal joint. .