JPH0345183B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for dismantling a structure using a crushing device that crushes a concrete structure or the like by opening and closing an arm.

BACKGROUND ART A demolition method for dismantling a structure by compressing and crushing the columns and beams of the structure has been known for a long time. As shown in Fig. 3, the crushing device used in this construction method has a pair of arms 1, 1 attached to a side plate 2 via shafts 3, 3 so as to be openable and closable, and the side plate 2 is attached to the arm of a power shovel or the like. It is attached via a rotating plate 5 of a bracket 4 attached to the tip, and each arm 1, 1 is connected to a hydraulic cylinder 6 provided on the side plate 2 and the tip of a piston rod of the hydraulic cylinder, and is connected to the hydraulic cylinder 6. The arm is opened and closed by switching a manual switching valve (not shown) that switches the direction of hydraulic oil supply. When crushing a concrete structure, etc., the operator moves a power shovel, etc. to the part of the structure to be crushed with arms 1 and 1.
, and manually operate a control lever to switch the direction of hydraulic oil supply to the hydraulic cylinder 6 using a manual switching valve that responds to the lever to open and close the arms 1, 1,
The crushing blades 1a, 1a of the arms 1, 1 crush the portion of the structure to be crushed, thereby dismantling the structure.

As mentioned above, the crushing work using conventional crushing equipment is complicated, as the operator manually opens and closes the arms 1 and 1 while visually checking the crushing situation. Each closing operation took approximately 7 to 8 seconds, resulting in poor work efficiency.

Therefore, the applicant has already proposed a crushing device that automatically opens and closes the arm.

Problems to be Solved by the Invention The present invention provides a method for dismantling structures, etc., in which the structure, etc. is destroyed by clamping and crushing the part of the structure, etc. to be crushed by a crushing device whose arms automatically open and close.
The objective is to propose a demolition method that can efficiently dismantle structures.

Means for Solving the Problem An opening/closing drive device connected to a pair of arms provided with crushing blades and operated by pressurized fluid, and a control that operates the opening/closing drive device to automatically repeatedly open and close the pair of arms. A crushing device having a device is attached to an arm of a power shovel, and while the opening/closing drive device is automatically operated by the control device, the arm of the power shovel is sequentially moved to the part to be crushed, and when the arm of the crushing device is open, the crushing device is moved to the part to be crushed. The crushing action is sequentially performed by holding the crushing parts, and the operator can dismantle structures etc. by simply moving the arms of the power shovel.

Operation: The operator continuously operates the opening/closing drive device using the control device of the crushing device, repeatedly opens and closes the pair of arms, moves the arm of the power shovel to the part to be crushed, and moves the part to be crushed by the arm's closing operation. The operator selects the next part to be crushed while the arm is crushing the part to be crushed, and when the part to be crushed is crushed or despite several opening and closing operations of the arm, the operator selects the next part to be crushed. If the part is not crushed,
The arm of the power shovel is moved to the next selected crushing section, and the operation of crushing the corresponding crushing section is sequentially performed.
This allows the operator to control the arm of the power shovel without having to control the opening and closing of the arm of the crusher.
That is, the structure can be dismantled simply by moving the crushing device to the crushing section.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a main part of a control section of a crushing device according to an embodiment of the present invention, which is attached to the basic configuration shown in FIG. 3 to constitute a crushing device. In Figure 1, 6
is a hydraulic cylinder as an opening/closing drive device shown in FIG. 3, and the first and second cylinder chambers 6a, 6b are
Automatic switching valve 1 each consisting of 4 ports and 3 position switching valves
1 to the hydraulic pump 13 and the tank T, and as the internal volume of each cylinder chamber 6a, 6b expands, the piston rod 6c moves back and forth, and the arms 1, 1 move to close and open. It's getting old. That is, the first and second cylinder chambers 6a, 6
b is the outlet port 11a, 11b of the automatic switching valve 11
is connected to the automatic switching valve 1 via pipes 14 and 15.
The inlet port 11c of 1 is connected to the port 11d of the tank T.
is connected to the pump 13. In the automatic switching valve 11, when both electromagnetic solenoids 11e and 11f are demagnetized and assume a neutral position (center in the figure), the inlet ports 11c and 11d communicate with each other, and when the electromagnetic solenoid 11e is energized, the inlet ports 11c and 11d are in communication with each other. Take the open position of arms 1 and 1 shown on the right side, and connect ports 11a and 1.
1c is in communication with the ports 11b and 11d, and the ports 11b and 11d are in communication with each other.On the other hand, when the electromagnetic solenoid 11f is energized, the arms 1, 1 shown on the left side of the figure are switched to the closed position, The ports 11a and 11d are configured to communicate with each other, and the ports 11b and 11c are configured to communicate with each other.

Pressure switches 16 and 17 as pressure detectors are connected to the branch pipes 18 and 15, respectively.
Each switch 16, 17 switches from the illustrated switching position to the other switching position when the hydraulic oil supply pressure via the pipes 14, 15 reaches a set value, for example, 250 kg/cm ² , and the detected result is It is designed to output.

Next, a control circuit as a driving means for switching and driving the automatic switching valve 11 will be explained. The control circuit is connected to the flip-flop circuits 21 and 22 and the set output terminal of each flip-flop circuit 21 and 22, and when the set output is at a high level, the automatic switching valve 1 is connected to the flip-flop circuits 21 and 22.
The electromagnetic solenoids 11e and 11f are provided with solenoid drive circuits 23 and 24 for exciting the respective electromagnetic solenoids 11e and 11f.

Set input terminal S of flip-flop circuit 21
The output of the pressure switch 16 and the output from the push button switch OS for commanding the opening of the arms 1, 1 are inputted via the OR circuit 25. Further, the output of the pressure switch 17 and the output of the reset push button switch RS for stopping the opening/closing operation of the arms 1, 1 are input to the reset input terminal R of the flip-flop circuit 21 via an OR circuit 26.
Further, the output of the pressure switch 17 and the output from the push button switch CS for commanding closing of the arms 1, 1 are input to the set input terminal S of the flip-flop circuit 22 via the OR circuit 27. Further, the output of the pressure switch 16 and the output of the reset pushbutton switch RS are input to the reset input terminal R of the flip-flop circuit 22 via an OR circuit 28. In addition, each pushbutton switch RS, CS, OS
By pressing each push button switch, the DC power supply +E outputs H level to each OR circuit 2.
5 to 28.

Next, an embodiment of the present invention will be described in which the above-mentioned crushing device is attached to the arm of a power shovel to dismantle a structure or the like.

First, in accordance with the current stop state of the arms 1, 1 of the crusher, that is, if the arms 1, 1 are currently closed, press the push button switch OS to open the arms 1, 1. A push button switch that closes arms 1 and 1 if arm 1 is open.
Press the CS to drive the crushing device. For example, if the pushbutton switch CS that closes arms 1, 1 is now pressed, the flip-flop circuit 22
is set via the OR circuit 27, the solenoid 11f is energized via the solenoid drive circuit 24, and the automatic switching valve 11 is switched to the closed position shown on the left side in FIG. As a result, the hydraulic oil from the pump 13 is supplied to the first cylinder chamber 6a through the passage 11h, the piston rod 6c moves forward, and the hydraulic oil in the second cylinder chamber 6b is supplied to the pump 13 through the passages 11g and 12i. Return to piston rod 6c
extends, arms 1, 1 close, and arms 1, 1
When the pressure switch 1 is closed, the pressure of the hydraulic oil in the connecting pipe 14 increases, and when the set pressure is reached, the pressure switch 1 is turned off.
6 contact position is switched. The flip-flop circuit 22 is reset via the OR circuit 28 by the output of the pressure switch 16 accompanying this switching operation, and the flip-flop circuit 21 is set by the output of the OR circuit 25, and the solenoid 11f is demagnetized.
Since the solenoid 11e is energized, the automatic switching valve 1
1 switches from the closed position to the open position, and the direction of hydraulic oil supply from the pump 13 changes to the opposite direction.
Hydraulic oil is supplied from the pump 13 to the second cylinder chamber 6b via the passage 11j, while hydraulic oil in the first cylinder chamber 6a returns to the tank T via the passage 11i, the piston rod 6c retreats, and the arms 1,
1 is performed, and when the hydraulic oil supply pressure to the opening cylinder 6b reaches a predetermined pressure and the arms 1, 1 are expanded beyond a predetermined expansion angle, this causes the pressure switch 17 to open.
The flip-flop circuit 21 is reset by the output of the pressure switch 17 via the OR circuit 26, and the flip-flop circuit 22 is reset by the output of the pressure switch 17.
is set again via the OR circuit 27, so
As described above, the operation of closing the arms 1, 1 starts again, and thereafter, the above-described operation is repeated in sequence, and the arms 1, 1 repeatedly perform the opening and closing operation. and the reset pushbutton switch.
If RS is pressed, the flip-flop circuit 21,
22 is reset and the operation of this crusher is stopped.

Furthermore, when the pushbutton switch OS for opening the arms 1 and 1 is pressed, the same operation as described above is performed. That is, if either flip-flop circuit 21 or 22 is set, the crushing device is activated. It starts the operation and opens and closes the arms 1, 1, and the operation of the crusher can be stopped by pressing the reset push button switch RS.

Therefore, the operator operates the crushing device as described above, moves the arm of the power shovel when arms 1 and 1 are opened, and moves the crushing blade 1 of the arm.
Since the arms 1, 1 automatically close by simply interposing the portion to be crushed between a and 1a, the portion to be crushed is crushed, and then the arms 1, 1 perform an opening operation. The closing and opening operations of the arms 1, 1 each take about 7 to 8 seconds, and the crushing blades 1a, 1 of the arms 1, 1
After setting the part to be crushed between 1a and 1a, the crushing action is automatically performed, so the operator uses the period of closing and opening of the arms 1 and 1 to move the next part to be crushed. Immediately after the crushing is completed, move the arm of the power shovel to the next part to be crushed, and move the arm of the power shovel to the next part to be crushed by the crushing blades 1a, 1 of the arm.
Just hold it with a. That is, after driving the crushing device, the operator only has to move the arm of the power shovel to sandwich the part to be crushed between the crushing blades 1a, 1a of the arm. There is time to select the parts to be crushed, and once the crushing work of one part to be crushed is completed, the work can immediately shift to the crushing work of the next part to be crushed, and the destruction work of structures etc. can be carried out efficiently. can. If the part to be crushed is not crushed by one closing operation of the arms 1, 1, open and close the arms 1, 1 several times to squeeze and crush the part to be crushed, or close the arms 1, 1 several times. If it is not crushed even after opening and closing, it goes without saying that the operation can be performed to move to another part to be crushed and crush it.

The above is an example of the method for destroying structures, etc. of the present invention, and the crushing device used in the above example uses pressure switches 16 and 17 to close and close the arms 1 and 1.
Although the opening is detected, depending on the size of the part to be crushed, there is no need to fully open the arms 1, 1.
In addition, when the arms 1, 1 reach the closed position with a certain opening degree, it means that the part to be crushed has been crushed, so there is no need to fully close the arms. It may be possible to adjust the size according to the size of the image.

A control device for the crushing device in this case is shown in FIG. This control device is almost the same as the control device shown in FIG. 1, but the difference is that a flow meter 30 consisting of a turbine meter or the like outputs a pulse train according to the flow rate of hydraulic oil in and out of the connecting pipe 14. established,
An up-down counter 31 outputs the output of the flow meter 30.
Also, the set output of the flip-flop circuit 22 is input to the addition command input terminal of the up-down counter 31, and the set output of the flip-flop circuit 21 is input to the subtraction command input terminal. Further, the output of the counter 31 is connected to decoders 32 and 33 that can set the closed position and open position of the arms 1 and 1, and the output of the decoder 32 that has set the closed position is input to OR circuits 35 and 36, and the flip-flop The circuits 22 and 21 are reset and set, respectively.
Also, a decoder 3 that sets the open position of the arms 1 and 1
The outputs of 3 are input to OR circuits 34 and 37 to set and reset flip-flop circuits 22 and 21, respectively. Also, 16 is the connecting pipe 1
A pressure switch connected to a branch pipe 18 branched from arm 1, similar to the control device shown in FIG.
When the pressure of the hydraulic oil reaches the set maximum pressure (for example, 250 kg/cm ² ) when 1 is closed, the switch changes, outputs to the OR circuits 35 and 36, and resets the flip-flop circuits 22 and 21. and set the arm 1,
When the part to be crushed is not crushed by the closing operation of arm 1 and the pressure of the hydraulic oil reaches the set maximum pressure before the value of the counter 31 reaches the value set in the decoder 32, the arms 1 and 1 are opened. This is for switching to . The above points are different from the control device shown in FIG. 1, but other points are the same, and the same symbols are attached to the same members.

Therefore, depending on the size of the part to be crushed, the crushing end position of the arms 1, 1 is sent to the decoder 32, that is, the closing operation end position of the arm is sent to the decoder 33.
When one of the pushbutton switches CS and OS for closing or opening is pressed, for example, when the pushbutton switch CS for closing is pressed, the flip-flop circuit 2 is closed as described above.
2 is set via the OR circuit 34 to drive the solenoid 11f and close the arms 1,1. On the other hand, when the hydraulic oil supplied from the pump 13 flows through the connecting pipe 14, the flow meter 30 detects it and generates a pulse, and the counter 31, which has been put into an addition state by the set output of the flip-flop 22, adds up the pulses. . On the other hand, when the part to be crushed is crushed by the closing operation of the arms 1, 1, and the value of the counter 31 reaches the value set by the decoder 32, that is,
When the arms 1, 1 reach the set crushing end position, an output is output from the decoder 32, which resets the flip-flop circuit 22 via the OR circuit 31 and sets the flip-flop circuit 21 via the OR circuit 36. As a result, the switching valve 11 is switched and the arms 1, 1 are opened. During the opening operation of the arms 1, 1, the flow meter 3 is
The pulse outputted from 0 is put into a subtraction state by the set output of the flip-flop circuit 21, and the counter 31 is caused to subtract. As a result, the decoder 32
When the arms 1, 1 reach the opening end position set in step 1, an output is output from the decoder 32 to reset the flip-flop circuit 21, set the flip-flop circuit 22, and close the arms 1, 1 again.

Note that if the part to be crushed is not crushed by the closing action of the arms 1, 1 and the hydraulic oil pressure reaches the set maximum pressure before the decoder 32 outputs an output, the pressure switch 16 outputs an output. Then, the flip-flop circuit 22 is reset, the flip-flop circuit 21 is set, and the arms 1, 1 are opened.

When a device to be crushed that has a control device that operates as described above is attached to the arm of a power shovel, the arms 1, 1 can be adjusted to the open end position, crushing end position, or closed position depending on the size of the part to be crushed. Set the end position in the decoders 33, 32, drive the crushing device,
A structure or the like can be dismantled simply by automatically opening and closing the arm and moving the arm of the power shovel to the selected part to be destroyed as described above.
In this case, compared to the example shown in Fig. 1, the opening and closing degrees of the arms 1 and 1 are set by the decoders 33 and 32, so the dismantling work can proceed more efficiently than if the opening and closing cycles of the arms are not made faster. can.

Effects of the Invention As described above, in the present invention, the crushing device that automatically opens and closes the arm and crushes the parts to be crushed is attached to the arm of a power shovel, and the crushing device can be activated by simply moving the arm of the power shovel. Since the parts to be crushed are automatically crushed, the operator only has to select the next part to be crushed while the crushing device is crushing, and move the arm of the power shovel to the selected part to be crushed. That is,
Since the crushing operation by the arm requires 7 to 8 seconds to close the arm and 7 to 8 seconds to open the arm, the next part to be crushed can be selected using this time, and the crushing is automatically performed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a control device of one embodiment of a crushing device implementing the present invention, FIG. 2 is a control block diagram of another embodiment of a crushing device implementing the present invention, and FIG.
The figure is a partial plan view showing the basic configuration of the arm of the crushing device and the opening/closing drive device. DESCRIPTION OF SYMBOLS 1... Arm, 1a... Crushing blade, 6... Hydraulic cylinder, 11... Automatic switching valve, 21, 22... Flip-flop circuit, 23, 24... Solenoid drive circuit, 11e, 11f... Solenoid, 25
~28, 34-37...OR circuit, 31...Up-down counter, 32, 33...Decoder, 3
0...Flowmeter.

Claims (1)

[Claims] 1 A power shovel is a crushing device that has an opening/closing drive device connected to a pair of arms provided with crushing blades and operated by pressurized fluid, and a control device that operates the opening/closing drive device to automatically repeatedly open and close the pair of arms. attached to the arm of the person, and by the control device,
A method for dismantling structures, etc., in which the arm of the power shovel is sequentially moved to the part to be crushed while the opening/closing drive device is automatically operated, and when the arm of the crushing device is open, the part to be crushed is held between the parts to sequentially perform a crushing action. .