JPH09242124A - Safety equipment for construction machinery - Google Patents

Abstract

(57) Abstract: In a construction machine provided with remote control operating means, safety at the time of operation by the remote control operating means is enhanced. SOLUTION: The remote controller 10 can be operated only when both an ON switch 10A of a remote controller 10 and a remote control switch 5E of an alarm panel 5 are ON. When operating the gripping device in three modes: high speed, low speed, and slow speed, the rotary switch 6C
The remote controller 10 can be operated only when is switched to the slow speed mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, erection of piles,
The present invention relates to a safety device for a construction machine such as a dismantling machine for dismantling, and more particularly to a safety device applied to an operating device for a construction machine that can be operated by remote control.

[0002]

2. Description of the Related Art When performing underground construction such as subway construction or construction of a basement floor of a building, a dismantling machine to prevent swelling or collapse of piles for retaining earth such as sheet piles buried in a wall It is designed to be installed and dismantled in the underground space excavated by using the steel to support the piles. A gripping device equipped with a cylinder that can be driven by hydraulic pressure is attached to the tip of the arm of the dismantling machine so that it can move up and down, forward and backward, and can swing and rotate vertically and horizontally.
The shape steel is gripped by this gripping device, and the gripped shape steel is
It has been proposed to perform work by moving up and down, front and back, or rotating.

The erection / disassembly machine equipped with such a gripping device is operated by an operation lever provided at the side of the driver's seat and an operation pedal provided at the foot of the driver's seat. The operation lever is provided so as to be tiltable between upper, lower, left and right work positions and the neutral position, and the operation pedal is provided so as to be tiltable between front and rear work positions and the neutral position. The above-described various work contents are assigned to the work positions of the operation lever and the operation pedal, and the work is performed by tilting the operation lever and the operation pedal to positions suitable for the work contents.

In the erection and dismantling machine described above, the actuator is driven at a speed according to the work contents to operate the gripping device. For example, when you want to move the gripped mold steel largely, you can drive the actuator in high speed mode for quick work, and when you perform bolt alignment work for the gripped mold steel, drive the actuator in low speed or fine speed mode to make accurate I am ready to work.

Further, such an erection and dismantling machine is also remotely operated. In addition to operating devices such as operating levers installed in the driver's seat of the dismantling machine, a remote control operating device that drives the gripping device by remote control operation is installed in the dismantling machine, and the operator operates the remote control operating device. However, the work can be performed by the gripping device. Performing remote control operation using the remote control operation device in this way is, for example, when attaching the shape steel to the receiving member.
This is because it is difficult to make the bolt holes of the mold steel and the bolt holes of the receiving member coincide with each other only by the operation from the driver's seat when performing the alignment work of the bolt holes of the mold steel and the bolt holes of the receiving member. In this case, an operator directly moves the gripping device while directly looking at the bolt holes of the shape steel to perform fine adjustment so that the bolt holes are aligned with each other.

[0006]

However, when the remote control operation is performed, it is necessary to closely cooperate with the operator of the dismantling machine and the remote control operator. Also, if the drive speed of the erection / disassembly machine can be switched, if the remote control operation is performed at a high speed, it is difficult to position the shape steel, so it is usually performed at a low speed, but a speed selection operation is required for speed switching. Yes, the operability was poor.

An object of the present invention is to provide a construction machine safety device capable of enhancing operability when a construction machine is remotely controlled by a remote control operating device.

[0008]

FIG. 1 shows an embodiment of the present invention.
Describing with reference to FIG. 6, the safety device for a construction machine according to claim 1 includes a working means 34 for performing a predetermined work, and operating means 1R, IL, 3R, 5, 6 for operating the working means 34.
A first operation switch 5E which is applied to a safety device for a construction machine including a remote control operating means 10 for remotely operating the working means 34, is provided in the operating means 5, and enables the remote control operating means 10 to be operated, and remote control operation. A second operation switch 10A provided on the means 10 and operable to operate the remote control operation means 10, a first operation switch 5E and a second operation switch 5E.
The above-described object is achieved by further including a control means that enables the operation means 34 to be operated by the remote control operation means 10 only when both operation switches 10A are turned on.

Referring to FIGS. 6 and 13,
In the safety device for a construction machine according to claim 2, the construction machine comprises a lower traveling body 20 that is self-propelled and an upper revolving body 22 that revolves with respect to the lower traveling body 20, and the working means is an upper revolving body 22. Gripping device 3 that is installed in the grip and grips the shaped steel 102a
4, operating means 5 and remote control operating means 10
However, the first warning lights 5A and 10C which are turned on when the gripping device 34 is gripping the shaped steel 102a by a predetermined gripping force.
And second alarm lights 5B and 10D that are turned on when the gripping device 34 is gripping the steel mold 102a with a gripping force smaller than a predetermined gripping force, and the control means is the first operation switch 5E. And the second operation switch 10A
Is a means for turning on the first or second warning lights 5A, 5B, 10C, 10D only when both of them are turned on.

In the safety device for a construction machine according to claim 3, when the control means operates the gripping device 34 in three modes of the high speed mode, the low speed mode and the slow speed mode, and when the gripping device 34 is operated in the slow speed mode. This is a means for allowing the gripping device 34 to be operated by the remote control operating means 10 only.

In the safety device for a construction machine according to claim 4, an opening / closing switch 6A for opening / closing the gripping device 34 is provided only in the operating means 6.

Referring to FIGS. 1 to 6, the safety device for a construction machine according to claim 5 performs a predetermined work at least at a first speed and at a second speed lower than the first speed. Safety of a construction machine provided with a work means 34 for performing a predetermined work for carrying out the work, operation means 1R, IL, 3R, 5, 6 for operating the work means 34, and remote control operation means 10 for remotely operating the work means 34. The above object is achieved by further comprising a control means which is applied to the apparatus and which enables the operation means 34 to be operated by the remote control operation means 10 only when the operation means 34 operates at the second speed.

According to a sixth aspect of the invention, the control means operates the working means 34 in three modes of the high speed mode, the low speed mode and the slow speed mode, and only when the working means 34 is operated in the slow speed mode. Operating means 10
Is a means for making the working means 34 operable.

A safety device for a construction machine according to a first aspect of the present invention controls the remote controller only when the first operation switch 5E of the operation means 5 is turned on and the second operation switch 10A of the remote control operation means 10 is turned on. The operation means 10 enables the operation means 34 to be operated.

In the safety device for a construction machine according to claim 2, the working means comprises the gripping device 34, and the remote control operating means 10
When the first or second alarm lamp 5A, 5B, 10C, 10D is turned on when the operation switch 10A is turned on, both the operation means 5 and the operation switches 5E, 10A of the remote control operation means 10 are turned on. If it does not light up, it can be confirmed that either or both of the operation switches 5E and 10A of the operation means 5 and the remote control operation means 10 are not turned on.

In the safety device for a construction machine according to the third aspect, since the gripping device 34 can be operated by the remote control operating means 10 only when it is operated in the slow speed mode, the gripping device 34 can be operated by the remote control operating means 10. When operated,
The gripped mold steel 102a does not suddenly start moving at high speed.

In the construction machine safety device according to the fourth aspect, since the gripping device 34 cannot hold and release the mold steel 102a by the remote control operating means 10, the operation by the remote control operating means 10 is erroneously performed, and the gripping device is erroneously operated. It is possible to prevent the gripped mold steel 102a from dropping by opening 34.

The safety device for a construction machine according to claim 5 can be operated by the remote control operating means 10 only when the working means 34 is working at the second speed.

In the safety device for a construction machine according to the sixth aspect, the gripping device 34 can be operated by the remote control operating means 10 only when operated in the slow speed mode.

In the section of the means for solving the above-mentioned problem which explains the constitution of the present invention, the drawings of the embodiments of the present invention are used to make the present invention easy to understand. However, the present invention is not limited to this.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a circuit diagram of a safety device for a construction machine according to the present invention, FIG. 2 is a front view showing the appearance of a remote controller, FIG. 3 is a rear perspective view of a driver's seat which is an operating device, and FIG. 4 is an alarm panel in the driver's seat. FIG. 5 is an enlarged view of a switch panel in a driver's seat, FIG. 6 is a side view showing an embodiment of an erection / disassembly machine to which an operating device according to the present invention is applied, and FIG. 7 is an embodiment of FIG. 8 is a partial cross-sectional side view of a gripping device of the erection dismantling machine of the embodiment of FIG. First, FIG. 6, FIG. 7 and FIG.
The configuration of the dismantling machine will be described with reference to.

As shown in FIGS. 6 and 7, the hydraulic excavator main body 23 is constructed by installing an upper swing body 22 on the lower traveling body 20 via a swing device 21. Two
Reference numeral 4 denotes a bracket fixedly installed on the upper swing body 22, and when used as a hydraulic excavator, the boom and the boom cylinder are connected by a pin. In the present embodiment, the pin hole of the bracket 24 is used. hand,
The mast 25 is replaceably attached to the boom or boom cylinder by the pins 26 and 27.

The mast 25 is built in the inner cylinder 25a attached to the bracket 24 by the pins 26 and 27, the outer cylinder 25b slidably fitted in the inner cylinder 25a, and the inner cylinder 25a. Is attached to the inner cylinder 25a, and the upper end of the piston rod is pinned to the outer cylinder 25b.

A telescopic arm 30 is attached to the top of the mast 25 so that the hydraulic cylinder 29 for elevation can raise and lower around the pin 28a. More specifically, telescopic arm 3
0 is attached to the upper part of the outer cylinder 25b by a pin 28a,
The tube end of the elevation hydraulic cylinder 29 is attached to the lower portion of the outer cylinder 25b by a pin 28b. The telescopic arm 30 includes an outer cylinder 32 connected to the mast 25 by a pin 28a, an inner cylinder 31 slidably fitted in the outer cylinder 32, and a hydraulic cylinder 33 for expansion and contraction built in these. The base end of the expansion / contraction hydraulic cylinder 33 is connected to the outer cylinder 32, and the piston rod is connected to the inner cylinder 31. The stroke of the telescopic arm 30 is set to be larger than the amount of movement by which the mold steel can be separated from the state where the mold steel is gripped, that is, the width of the mold steel.

A vertical cylinder swinging hydraulic cylinder 41, which will be described later, is housed in the inner cylinder 31 of the telescopic arm 30, its base end is connected to the inner cylinder 31, and the piston rod is connected to a link mechanism 85, which will be described later. .

As shown in FIGS. 6 and 7, the gripping device 3 is provided at the tip of the telescopic arm 30, that is, at the tip of the inner cylinder 31.
4 is attached via a vertical swinging device 35, a horizontal swinging device 36, and a turning device 37. The vertical swinging device 35 is connected to the bracket 38 attached to the tip of the inner cylinder 31 of the telescopic arm 30, the bracket 40 attached to the bracket 38 so as to be vertically movable around the pin 39, and the brackets 38 and 40. Link mechanism 85,
The hydraulic cylinder 41 for vertical swinging is attached between the link mechanism 85 and the inner cylinder 31.

As shown in FIGS. 6, 7 and 8, the left and right swinging device 36 includes a bracket 43 mounted on a bracket 40 so as to be swingable left and right around a pin 42, and these brackets 40, 43. It is composed of a pair of left and right swing hydraulic cylinders 44 and 45 mounted on the left and right, and swings the bracket 43 left and right by extending one of the left and right swing hydraulic cylinders 44 and 45 and contracting the other. Is.

As shown in FIG. 8, the turning device 37 includes an outer ring 46 attached to the bracket 43 of the left and right swinging device 36.
An inner ring 47 which is rotatably attached to the inner circumference of the outer ring 46 and has an internal gear, a turning hydraulic motor 48 attached to the bracket 43, and an output shaft of the turning hydraulic motor 48. It comprises a pinion 49 that meshes with the internal gear 47 and a revolving frame 50 fixed to the inner ring 47.

As shown in FIGS. 6, 7 and 8, the gripping device 34 has side plates 51 fixedly attached to both sides of the swivel frame 50, and fixing claws 52 attached to the lower portions of the side plates 51, respectively. It is composed of a movable claw 54 attached to the top of each side plate 51 via a parallel link mechanism 53, and a hydraulic cylinder 62 for opening and closing the movable claw 54. The side plate 5
1, the fixed claw 52, the parallel link mechanism 53, the movable claw 54 and the opening / closing hydraulic cylinder 62 are provided one by one as shown in FIG. The parallel link mechanism 53 includes links 57 and 58 rotatably attached to the side plates 51 by pins 55 and 56, respectively, and a pin 5 at the tip of each link 57 and 58.
And a bracket 61 which is rotatably connected by 9, 60 and is integral with the movable claw 54.
The line connecting 9,60 forms a parallelogram. The opening / closing hydraulic cylinder 62 is provided between the rearward extending portion of the link 57 and the revolving frame 50.

As shown in FIG. 6, the hydraulic excavator body 23
A control box 7 is provided on the side of the driver's seat, and a remote controller 10 described later is attached to the control box 7 via a cable 11.

As shown in FIG. 3, the hydraulic excavator body 23
The driver's cab is operated by operating levers 1 provided on both sides of the driver's seat 9.
R, 1L, the second operation levers 2R, 2L provided in front of the driver's seat 9, and the operation pedal 3 provided on the right side of the second operation levers 2R, 2L in the lower front part of the driver's seat 9.
R, consoles 4R and 4L provided behind the operating levers 1R and 1L, an alarm panel 5 provided in front of the operating lever 1R, and a switch panel 6 provided behind the operating lever 1L.

The driver's seat 9 is attached to the floor of the operator's cab in a state where the position can be adjusted in the vertical direction and the front-back direction.
Here, the front-rear direction and the left-right direction of the driver's seat 9 are directions with respect to the operator seated in the driver's seat 9.

The operating levers 1R and 1L are mounted on both sides of the driver's seat 9 so as to be tiltable between the upper, lower, left and right working positions and the neutral position. The operation pedal 3R is attached to the floor surface of the operator's cab so as to be tiltable between the front and rear working positions and the neutral position. These operating lever 1
The R, 1L and the operation pedal 3R output a pilot oil pressure or an electric signal according to the operation amount. Operating lever 1R, 1
The L, the operation pedals 3R, the consoles 4R and 4L, the alarm panel 5 and the switch panel 6 are for controlling various operations such as a depression operation and a turning operation of the dismantling machine.

On the other hand, the second operating levers 2R, 2L are attached so as to be tiltable between the front and rear working positions and the neutral position, and output pilot hydraulic pressure or electric signals according to the operation amount. The operation levers 2R and 2L are for driving the lower traveling body 20 of the dismantling machine to control the movement of the dismantling machine.

As shown in FIG. 4, the alarm panel 5 lights up when the gripping force by the gripping device 34 is appropriate, and when the gripping force by the gripping device 34 is insufficient, it lights up. Lack of gripping power lamp 5B and gripping device 3
4, an overload warning lamp 5C that lights up when the gripping force by 4 is too large, a remote control lamp 5D, and a remote control switch 5E for enabling the remote controller to be operated as described later.
Are provided. The remote control lamp 5D lights up when both the remote control switch 5E and an ON switch 10A of the remote controller 10 described later are turned on.

As shown in FIG. 5, the switch panel 6 has a gripping device opening / closing switch 6A for opening / closing the gripping device 34.
A gripping device opening / closing lock switch 6B that locks the gripping device 34, and a speed switching rotary switch 6C (hereinafter simply referred to as a rotary switch) that switches the operation mode of the gripping device 34 are provided.

The remote controller 10 shown in FIG.
As shown in Fig. 6, the control box 7 for the dismantling machine
To the cable via the cable 11. The remote controller 10 includes an ON switch 10A for enabling the remote controller 10 to be operated, an OFF switch 10B for making the remote controller 10 inoperable, and a gripping force suitable lamp 10C which is turned on when the gripping force by the gripping device 34 is appropriate. And a gripping force shortage lamp 10D that lights up when the gripping force of the gripping device 34 is insufficient, and a switch group 10E for operating the gripping device 34. The switch group 10E causes the gripping device 34 to perform the same operation as the gripping device 34 is operated when the above-described operation levers 1R and 1L and the operation pedal 3R are operated. It should be noted that the remote controller 10 is not provided with a switch for opening / closing or locking the grip of the grip device 34 or switching the operation mode of the grip device 34.

The circuit of FIG. 1 has a remote controller 10
Switch or switch group 10A, 10B, 10E
, Gripping power suitable lamp 10C, gripping power insufficient lamp 10D
The speed changeover switch 6C of the switch panel 6, the remote control switch 5E of the alarm panel 5, the gripping pressure of the gripping device 34 are detected, and the gripping force appropriate lamp 10C, the gripping force insufficient lamp 10D, the gripping force appropriate lamp 5A or The electric connection with the gripping pressure sensor 8 for lighting the gripping force insufficient lamp 5B will be described. The operation of the circuit of FIG. 1 will be described later.

Next, the operation of the hydraulic excavator body 23 described above will be described. 9-11 shows an example of the hydraulic circuit of the said working machine. In this hydraulic circuit, by operating the speed changeover rotary switch 6C, a high speed circuit when the high speed mode is selected (FIG. 9) and a low speed circuit when the low speed mode is selected (FIG. 1).
0) and the fine speed circuit (FIG. 11) when the fine speed mode is selected can be selected. In FIG. 9, the first to third pumps P1 to P3 are driven by the engine Eng to discharge pressure oil. The first control valve CV1 has a valve portion V11.
To V15, the valve unit V11 has a left traveling hydraulic motor M1,
The valve portion V12 controls the expansion / contraction hydraulic cylinder 33, the valve portion V14 controls the elevation hydraulic cylinder 29, and the valve portion V15 controls the speed and drive direction of the upper swing body swing hydraulic motor M2 included in the swing device 21. A second mast cylinder is connected to the valve portion V13 when the mast is expanded and contracted in two stages. The second control valve CV2 includes valve portions V21 to V24,
The valve portion V21 controls the right traveling hydraulic motor M3, the valve portion V22 controls the vertical swinging hydraulic cylinder 41, and the valve portion V23 controls the speed and driving direction of the mast extension hydraulic cylinder 25c. The solenoid valve CA1 controls the drive direction of the opening / closing hydraulic cylinder 62, and the second solenoid valve CA2 controls the valve portions V31 and V32.
And the valve portion V31 is a left-right swing hydraulic cylinder 44, 4
5, the valve portion V32 controls the drive direction of the turning hydraulic motor 48 of the gripping device 34. Valve part 31,
32, the first pump P1 is provided with a shunt valve 72 as described later.
The pressure oil that is split in is supplied. The solenoid valves CA1 and C
You may make it control the drive speed of various cylinders by adjusting the opening degree of A2.

An electromagnetic valve 71 is connected to the pump P1, and the electromagnetic valve 71 has a first flow dividing valve 72 and a slow return valve 73.
Is connected. The first flow dividing valve 72 divides the pressure oil from the solenoid valve 71 into 1: 4, the solenoid valve CA2 of the grip attachment CA is connected to the circuit S1 of small flow rate, and the circuit L1 of large flow rate is connected to the second. The diversion valve 74 is connected. Second
Of the first diversion valve 72 divides the pressure oil from the first diversion valve 72 in a one-to-one manner. The first control valve CV1 is connected to one circuit E1 and the second control valve is connected to the other circuit E2. CV2 is connected. An electromagnetic valve 75 is connected to the slow return valve 73. A solenoid valve 76 is connected to the pump P2, and a second control valve CV2 is connected to the solenoid valve 76. The electromagnetic valve CA1 of the grip device 34 is connected to the pump P3.

The solenoid valves 71, 75 and 76 are operated at high speed, low speed, and
When each mode of slow speed is selected, the mode is switched as shown in FIG.

9 to 11, a high speed circuit, a low speed circuit,
The operation of the slow speed circuit will be described in detail. —High Speed Circuit— FIG. 9 shows a circuit in which the high speed mode is selected. The total amount of oil discharged from the pump P1 is transferred via the solenoid valve 71 to the first control valve CV1.
Then, the total amount of oil discharged from the pump 2 is
The control valve CV2 is supplied with the entire amount of oil discharged from the pump P3 to the solenoid valve CA1.

Therefore, when the first and second control valves CV1 and CV2 are operated by the operating levers 1R and 1L, the pressure oil corresponding to the operating direction and the operation amount is supplied to each actuator, and each actuator operates at high speed. Driven by. At this time, pressure oil is not supplied to the left and right swing hydraulic cylinders 44, 45 and the turning hydraulic motor 48 of the grip attachment CA, and the swinging and rotating motions of the grip device 34 cannot be performed in the high speed mode. This is to prevent a long object such as an H-shaped steel from being gripped and rotated at a high speed or swinging.

-Low Speed Circuit- FIG. 10 shows a circuit in which the low speed mode is selected. Pump P2
All of the discharged oil of the above flows from the solenoid valve 76 to the tank. On the other hand, the total amount of oil discharged from the pump P1 is supplied to the flow dividing valve 72 via the electromagnetic valve 71, and the flow dividing valve 72 divides the flow into the circuits S1 and L1 at a ratio of 1 to 4 of the discharge amount of the pump P1.

Therefore, a small amount of pressure oil is supplied from the circuit S1 to the solenoid valve CA2 of the grip attachment CA.
On the other hand, the pressure oil that has flowed into the circuit L1 is further divided into equal parts by the flow dividing valve 74, and from the circuit E1 to the first control valve CV1.
The pressure oil is divided into equal parts from the circuit E2 to the second control valve CV2. The entire amount of oil discharged from the pump P3 is supplied to the solenoid valve CA1 of the grip device 34. Therefore, the operating lever 1R,
1L and the like, the first and second control valves CV1, CV2
When is operated, pressure oil corresponding to the operation direction and operation amount is supplied to each actuator, and each actuator is driven at the low speed divided by the flow dividing valves 72 and 74. At this time, the left and right swing hydraulic cylinders 44 and 45 of the grip attachment CA and the turning hydraulic motor 48 are supplied with pressure oil at a flow rate of 1/4 of the first and second control valves CV1 and CV2. The device 34 swings and rotates at a desired low speed.

-Slow Speed Circuit- FIG. 11 shows a circuit in which the slow speed mode is selected. Pump P2
All of the discharged oil of the above flows from the solenoid valve 76 to the tank. On the other hand, the entire amount of oil discharged from the pump P1 is supplied to the solenoid valve 71, but a part of the oil is discharged to the tank via the slow return valve 73 and the solenoid valve 75, and the rest is supplied to the flow dividing valve 72.
The shunt valve 72 has a flow rate of 1 to 4 for the circuits S1 and L, respectively.
Divide into 1. Therefore, the solenoid valve CA2 of the grip attachment CA is supplied with a smaller amount of pressure oil from the circuit S1 than in the low speed mode. On the other hand, the pressure oil that has flowed into the circuit L1 is further divided into equal parts by the flow dividing valve 74, and the circuit E1
From the circuit E2 to the second control valve CV2 from the circuit E2 to the first control valve CV1. The entire amount of oil discharged from the pump P3 is supplied to the solenoid valve CA1 of the grip device 34.

Therefore, when the first and second control valves CV1, CV2 are operated by the operating levers 1R, 1L, etc., the pressure oil corresponding to the operating direction and the operating amount is supplied to each actuator, and each actuator is operated by an electromagnetic force. Valve 75
The remaining flow rate not flown to the tank is driven by the flow dividing valves 72 and 74 at the minute speeds. At this time, the left and right swing hydraulic cylinders 44 and 45 of the grip attachment CA and the turning hydraulic motor 48 are supplied with pressure oil at a flow rate of 1/4 of the first and second control valves CV1 and CV2. The device 34 swings at the desired fine speed,
Make a rotation.

A procedure for erection of the section steel using this erection dismantling machine will be described. In order to hold the shape steel suspended from the ground on the bottom of the underground space, run the erection dismantling machine,
Turn. The shape steel is gripped as follows. FIG.
As indicated by the two-dot chain line in FIG. 3, the lifting hydraulic cylinder 29 lifts the telescopic arm 30 obliquely, the vertical swinging hydraulic cylinder 41 is contracted to make the gripping device 34 downward, and the opening / closing hydraulic cylinder 62 is contracted. And the movable claw 54 is opened. Further, the turning hydraulic motor 48 causes the orientations of the claws 52 and 54 to match the orientation of the shape steel 102a, and the elevation hydraulic cylinder 29 is contracted, whereby the shape steel 10
The central portion of 2a is sandwiched between the fixed claw 52 and the movable claw 54,
The hydraulic cylinder 62 for opening and closing is extended to grip the mold steel 102a between the claws 52 and 54. Next, the elevation hydraulic cylinder 29 is extended, the vertical swinging hydraulic cylinder 41 is extended, and the die steel 102a is lifted. The holding device 3 holds the shaped steel 102a.
14 is shown in the perspective view of FIG. Further, drive to the position where it should be installed.

It is desirable to perform this operation in the high speed mode. Then select low speed mode or slow speed mode,
The turning device 21 and the swinging device 3 are arranged so that the height, front and rear, and left and right positions of the shaped steel 102a are approximately located on the receiving member 104 and can be adjacent to the existing shaped steel 102a.
5, 36 are actuated to extend the hydraulic cylinder 33 for expansion and contraction and the die steel 102a is placed on the receiving member 104. For the final alignment, select the slow speed mode.

The plan view of FIG. 15 shows an example in which the mold steel 102a is applied along the pile 101. When the low speed mode or the slow speed mode is selected, one of the left and right swing hydraulic cylinders 44, 45 is extended at the same time as the left and right swing hydraulic cylinders 44 and 45 are extended in accordance with the angle between the direction of the telescopic arm 30 and the arrangement direction of the piles 101.
By contracting the other, the direction of the gripping device 34 with respect to the telescopic arm 30, that is, the angle of the mold steel 102a is adjusted. Further, after the shaped steel 102a is made horizontal by the turning hydraulic motor 48 of the rotating device 37, the telescopic arm 30 is extended to position the shaped steel 102a on the plurality of receiving members 104. Next, the elevation hydraulic cylinder 29 is contracted to lower the tip of the telescopic arm 30 slightly, so that the shape steel 10
2a is placed on the receiving member 104. After the shaped steel 102a is placed on the receiving member 104, the movable claw 54 of the gripping device 34 is opened by contraction of the opening / closing hydraulic cylinder 62, and then the telescopic arm 30 is contracted. As a result, the gripping device 34 can be retracted from the mold steel 102a without traveling of the main body. The mold steel 102a is fixed to the receiving member 104 with bolts and nuts.

The procedure for disassembling the mold steel 102a is as follows. With the movable claw 54 of the gripping device 34 opened, the gripping device 34 is directed toward the center of the mold steel 102a, the telescopic arm 30 is extended, and the gripping device 34 causes the mold steel 102a.
Is positioned between the claws 52 and 54. Hydraulic cylinder for opening and closing 6
2 is extended and the shaped steel 102a is gripped by the claws 52 and 54, and then the bolts and nuts that fix the shaped steel 102a to the pile 101 and the support member 104 of the pillar are unfastened. After that, the elevation hydraulic cylinder 29 is slightly extended to lift the shape steel 102a, the expansion hydraulic cylinder 33 is contracted to contract the expansion arm 30, and the hydraulic cylinder 41 for traveling up and down is swung to contract the hydraulic cylinder 41 for vertical swing. The gripping device 34 is directed downwards, the elevation hydraulic cylinder 29 is contracted, and the mold steel 102a is lowered onto the bottom surface 106.

When performing such various operations, particularly when fastening the mold steel 102a to the receiving member 104 with bolts or nuts, the positions of the bolt holes of the mold steel 102a and the bolt holes of the receiving member 104 can be obtained only by the operation from the driver's seat. Matching is difficult. Therefore, the operator can easily adjust the positions of the bolt holes by finely adjusting the gripping device 34 while observing the bolt holes near the shape steel 102a by the remote controller 10 described above. The operation by the remote controller 10 will be described with reference to FIG.

As shown in FIG. 1, the switch group 10E for operating the gripping device 34 of the remote controller 10 is connected to the power source D1 via the ON switch 10A, the remote controller switch 5E of the alarm panel 5 and the rotary switch 6C. There is. The gripping force appropriate lamp 10C or the gripping force insufficient lamp 10D of the remote controller 10 is connected to the power source D2 via the gripping pressure sensor 8 and grounded via the remote control switch 5E. The gripping pressure sensor 8 is interposed in the operation circuit of the hydraulic cylinder 62 for opening and closing the gripping cylinder, and closes to the side a when the circuit pressure is a predetermined value or more, and switches to the side b when the circuit pressure is less than the predetermined value.

Next, the operation of the circuit shown in FIG. 1 will be described. ON switch 10 of the remote controller 10
Even if A is turned on, if the remote control switch 5E of the alarm panel 5 is turned off, the power from the power source D1 is not supplied to the remote controller 10, so the switch group 10E of the remote controller 10 causes the gripping device 34 to operate. The operation cannot be performed. Further, in the present embodiment, even when the rotary switch 6C is not switched to the slow speed mode, the electric power from the power source D1 is not supplied to the remote controller 10, so that the gripping device 34 can be operated by the remote controller 10. Can not. This is, for example, to ensure that the driver cooperates with the person who operates the remote controller.

In order to start the operation of the gripping device 34 by the remote controller 10, the remote controller switch 5E of the alarm panel 5 is turned on and the on switch 10A of the remote controller 10 is turned on. Further, in the present embodiment, the rotary switch 6C is switched to the slow speed mode. When both switches 5E and 10A are turned on, the remote control lamp 5D of the alarm panel 5 is turned on to inform the driver that the remote control will be operated. On the other hand, at the same time, a warning light (not shown) provided on the hydraulic excavator main body 23 starts to light up, and the hydraulic excavator main body 2
Notify the workers who work around 3 to work with the remote control. Further, since the gripping force appropriate lamp 10C or the gripping force insufficient lamp 10D provided on the remote controller 10 is turned on, the operator of the remote control can know that the driver has turned on the remote control switch 5E. Further, the gripping force appropriate lamp 5A or the gripping force insufficient lamp 5B
Also, the driver knows that the worker has turned on the ON switch 10A.

As described above, the construction machine safety device according to the present invention enables the construction machine to be operated by the remote controller 10 only when the remote control switch 5E of the alarm panel 5 and the ON switch 10A of the remote controller 10 are simultaneously turned on. Since the operation can be performed, even if the on switch 10A of the remote controller 10 is turned on, the operation by the remote controller 10 cannot be performed unless the driver turns on the remote control switch 5E. Therefore, unless the driver permits the operation by the remote controller 10, the operator does not perform the operation by the remote controller 10, so that the cooperation between the driver and the operator can be ensured.

Further, since the operation by the remote controller 10 is possible only when the rotary switch 6C is set to the slow speed mode, the operator does not need to select the slow speed mode each time when operating the remote controller 10. Operability is improved.

Further, it is possible to confirm whether or not the driver turns on the remote control switch 5E by the gripping force appropriate lamp 10C or the gripping force insufficient lamp 10D. In addition, the driver operates the ON switch 1 with the gripping force appropriate lamp 5A or the gripping force insufficient lamp 5B.
It can be confirmed whether or not 0A is turned on. Further, the warning light can inform surrounding workers that the remote control operation is performed.

Since the remote controller 10 is not provided with a switch for opening and closing the gripping device 34, it is possible to prevent an operator from accidentally opening the gripping device.

The high-speed mode, the low-speed mode, and the fine speed mode have been described above with respect to the dismantling machine, but the present invention is not limited to this and is similar to the hydraulic circuits of various working machines that require a wide range of speed control from high speed to low speed. Applicable to Further, each of the high-speed circuit, low-speed circuit, and slow-speed circuit is not limited to the embodiment, and can be realized by various circuits.

Further, although the embodiment of the present invention has been described using the erection dismantling machine provided with the gripping device 34 in the above-mentioned embodiment, the safety device according to the present invention is applicable not only to the erection dismantling machine but also to any construction machine. Can also be applied.

Further, in the above embodiment, only when the remote controller switch 5E is turned on and the on switch 10A of the remote controller 10 is turned on,
Although the operation by the remote controller 10 is possible, the operation by the remote controller 10 may be possible when the rotary switch 6C is switched to the slow speed mode. As a result, the operation of the remote control switch 5E and the ON switch 10A becomes unnecessary and the workability is improved.

In the correspondence between the above embodiment and the claims, the gripping device 34 serves as the working means and the operating levers 1R, 1R.
L, the operation pedal 3R, the alarm panel and the switch panel 6 are operation means, the remote controller 10 is remote control operation means, the remote control switch 5E is the first operation switch, the on switch 10A is the second operation switch, and the gripping force is The appropriate lamps 5B and 10C constitute a first warning light, and the insufficient gripping force lamps 5C and 10D constitute a second warning light, respectively.

[0064]

As described in detail above, in the safety device for a construction machine according to the present invention, the first operation switch of the operation means is turned on and the second operation switch of the remote control operation means is turned on. Only because the operation means can be operated by the remote control operation means, unless the operator of the construction machine permits the operation by the remote control operation means,
The construction machine cannot be operated by the remote control operation means. Therefore, the cooperation between the driver and the operator who operates the remote controller is ensured.

Further, according to the safety device of the second aspect, the driver can confirm whether or not the first operation switch of the remote control operation means is turned on by the first or second warning light. It is possible for both the driver and the worker to notice whether or not the remote control operation can be started.

Further, according to the safety device of the third aspect, since the operation by the remote control operation means can be performed only when the gripping device is operated in the slow speed mode, the remote control operator changes the slow speed mode each time. The operation for selecting is unnecessary and the operability is improved.

According to the fourth aspect of the safety device, the holding device cannot be opened / closed by the remote control operating means.

Further, according to the safety device of the fifth aspect, since the operation can be performed by the remote control operation means only by reducing the speed of the work device, the operability can be improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a safety device according to the present invention.

FIG. 2 is a front view showing the appearance of a remote controller.

FIG. 3 is a rear perspective view of a driver seat, which is an operation device.

[Figure 4] Enlarged view of the alarm panel in the driver's seat

[Figure 5] Enlarged view of the switch panel in the driver's seat

FIG. 6 is a side view showing an embodiment of an erection dismantling machine to which the operating device according to the present invention is applied.

FIG. 7 is a plan view of the dismantling machine according to the embodiment of FIG.

FIG. 8 is a partial cross-sectional side view of the gripping device of the dismantling machine according to the embodiment of FIG.

9 is a diagram showing an example of a hydraulic circuit of the dismantling machine of FIG. 6, showing a high-speed circuit state.

10 is a diagram showing an example of a hydraulic circuit of the dismantling machine of FIG. 6, showing a low-speed circuit state.

11 is a diagram showing an example of a hydraulic circuit of the erection dismantling machine of FIG. 6, showing a state of a slow speed circuit.

FIG. 12 is a diagram showing switching positions of the solenoid valves of FIGS. 9 to 11 for each of a high speed mode, a low speed mode, and a slow speed mode.

FIG. 13 is a side view for explaining the operation of gripping the mold steel by the erection dismantling machine according to the embodiment of FIG.

FIG. 14 is a perspective view showing a state where the steel mold is gripped by the gripping device of the erection dismantling machine according to the embodiment of FIG. 6;

FIG. 15 is a plan view for explaining the direction adjusting operation of the mold steel of the gripping device of the dismantling machine according to the embodiment of FIG. 6;

[Explanation of symbols]

 1R, 1L, 2R, 2L operating lever 3R operating pedal 4R, 4L console 5 alarm panel 6 switch panel 8 gripping pressure sensor 9 driver's seat 10 remote controller 11 cable 20 lower traveling body 21 revolving device 22 upper revolving body 23 hydraulic excavator body 25 Mast 25a Inner cylinder 25b Outer cylinder 25c Mast expansion hydraulic cylinder 29 Lifting hydraulic cylinder 30 Extension arm 31 Inner cylinder 32 Outer cylinder 34 Grasping device 35 Vertical swinging device 36 Left and right swinging device 37 Swinging device 41 Vertical swinging hydraulic cylinder 44, 45 Left-right swing hydraulic cylinder 52 Fixed claw 54 Movable claw 62 Opening / closing hydraulic cylinder 71, 75, 76 Solenoid valve 72, 74 Flow dividing valve 85 Link mechanism P1 First pump P2 Second pump CV1, CV2 Control valve CA Grip attachment C 1, CA2 electromagnetic valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiichi Someno 2-6-2 Otemachi, Chiyoda-ku, Tokyo Within Nitto Construction Machinery Co., Ltd. (72) Inventor Akio Iwasaki 2--6, Otemachi, Chiyoda-ku, Tokyo No. 2 Nitto Construction Machinery Co., Ltd. (72) Inventor Toshiyuki Takasaka No. 2-6-2 Otemachi, Chiyoda-ku, Tokyo Inside Nitto Construction Machinery Co., Ltd.

Claims (6)

[Claims] 1. A safety device for a construction machine, comprising: a work means for performing a predetermined work; an operation means for operating the work means; and a remote control operation means for remotely operating the work means. A first operation switch for operating the remote control operating means, a second operation switch provided on the remote control operating means for operating the remote control operating means, the first operation switch and the A safety device for a construction machine, further comprising: a control unit that enables the operation unit to be operated by the remote control operation unit only when both of the second operation switches are turned on. 2. The construction machine comprises a self-propelled lower traveling body and an upper revolving body that revolves with respect to the lower traveling body, and the working means is installed on the upper revolving body to grip a shape steel. A first alarm lamp that is turned on when the gripping device grips the shaped steel by a predetermined gripping force, and the gripping device has a predetermined gripping device. A second alarm light that is turned on when the steel mold is gripped by a gripping force that is smaller than the force, and the control means turns on both the first operation switch and the second operation switch. The safety device for a construction machine according to claim 1, wherein the safety device is means for turning on the first or second warning light only when the above condition occurs. 3. The remote controller operating means operates the gripping device in three modes of a high speed mode, a low speed mode and a slow speed mode, and only when the gripping device is operated in the slow speed mode. The safety device for a construction machine according to claim 2, wherein the safety device is a means that enables the gripping device to be operated. 4. The safety device for a construction machine according to claim 2, wherein an opening / closing switch for opening / closing the gripping device is provided only on the operating means. 5. A working means for performing a predetermined work at least at a first speed and a second speed lower than the first speed, an operating means for operating the working means, and the working means remote. In a safety device for a construction machine, comprising a remote control operating means for operating, a control means for enabling operation of the working means by the remote control operating means only when the working means performs work at the second speed. A safety device for construction machinery, which is further equipped. 6. The control means operates the working means in three modes of a high speed mode, a low speed mode and a slow speed mode, and the remote controller operating means only when the working means is operated in the slow speed mode. 6. The safety device for a construction machine according to claim 5, wherein the safety means is a means that enables the working means to be operated.