JPH01207533A - Remote control device for construction machine or the like - Google Patents

Abstract

PURPOSE:To easily allow the modification to a remote control system by fitting an attachment to an operation rod portion and providing a switch controller and a neutral position detecting device containing various switches connected to this controller. CONSTITUTION:A switch controller 7 connected to a neutral position detecting device C and an automatic return relay device 6 incorporated integrally is constituted so that it can be moved to a separate place. The detecting device C is constituted of a decelerator 1, a motor 2, an expansion screw 4 and a neutral position detecting switch 5. When an operation lever 16 is depressed by one step, a positive rotation circuit is formed, when it is depressed by one more step, the motor 2 is positively rotated and the screw 4 is extended, an operation rod 10 is extended, when it is kept depressed, the screw 4 is extended to the utmost and the motor 2 is stopped. When the second-step operation switch is turned on, the screw 4 can be held at an optional extension position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is applicable to manually extendable and retractable rods of construction machines (for example, hydraulic cranes and excavators).

This invention relates to a device that can be operated remotely by attaching eleven devices without changing or remodeling the existing structure.

(Prior art) In addition to the remote control type Ia type that is pre-installed when manufacturing construction machinery, there are pneumatic type remote control kits on the market for modification, but these are based on pneumatic power sources. Not only is a compressor required, but it is also structurally impossible to stop the pulp at any time during the process and perform fine adjustment operation.

Furthermore, if the system is later modified to a remote control system, a portion of the mechanism must be structurally modified or changed, resulting in a considerable expense.

Other examples include a type in which a static pressure pipe is connected between a spool position adjustment cylinder and an operating cylinder, as in Japanese Utility Model Application No. 62-65490, and an electromagnetic type type.

(Problem to be solved by the invention) Is there any construction machine that is already on the market and in use that can be easily attached to a manually operated pulp rod, etc., and is highly safe and inexpensive? There was a request. Another problem was that it could be installed only at the necessary locations of each operating part without requiring the trouble of modifying or changing the machine.

(Means for solving the problem) Uses the power possessed by each construction machine and combines it with a device that converts the rotational force of the motor into expansion and contraction force. It can be easily attached to the operating rod of the control valve. It is an attachment type mechanism.

(Structure of the Invention) As illustrated in the drawings, 1 is a reduction gear 52, which is a motor, 3 is a forward and backward stroke control switch, 4 is a telescopic screw,
5 is a neutral position detection switch, i is an automatic return relay device,
The switch system fTO section consists of switches 11 and 12 and an operating lever 16.It has a double switch structure, and when the operating lever 16 is pressed or pulled in the first step, only one switch 11 is connected using the lever principle. This is a switch structure in which the order of operation is determined such that when the switch is further pushed (or pulled), it connects to the second stage switch 12. 8 is an electromagnetic clutch used when manual operation is required, 9 is a fulcrum of the lever, and 10 is an operating rod portion of the construction machine, to which this device is attached via a mounting bracket 19. 13 and 14 are each relay on the automatic recovery relay device, 15 is the main switch, and 17 is the remote control code. The configuration shown in Figure 2 can be roughly divided into the switch control section, the main automatic return relay device, and the neutral position detection device, but the automatic return relay device 1 and the neutral position 1 detection device are actually incorporated as a single unit. As a result, only the switch control unit 1 connected by the cord 17 is moved to a remote location.

Looking at the electrical circuit configuration diagram (Figure 3), the switch control section is roughly divided into an automatic return device and a neutral position detection device.

More specifically, the switch 11 specifies expansion (or contraction). The switch 12 turns on a forward (or reverse) current. The relay 13 forms a normal rotation circuit only when the specified voltage for extension is energized. (If it is not moving, it will be a reverse circuit.) A reverse circuit will be configured only if the relay 14 is excited with a reduced specified current. (If it is not moving, it will be a forward circuit.) Neutral position detection switch 5 When the relays 13 and 14 are both de-energized and a positive or reverse current is sent, all positive and negative circuits are automatically cut off when the relay returns to the neutral position (--dotted chain arrow).

(Operation of the invention) When the operating lever 16 is pushed (or pulled) one step, the switch 11
only turns on, energizing relay 13 or 14.

A forward rotation (or reverse rotation) circuit is configured. If the lever 16 is pushed (or pulled) one more step, a forward (or reverse) current is applied to the relay 13 or 14, the motor 2 rotates forward (or reverse), and the telescopic screw 4 extends (or contracts). Therefore, if the rod 10 is extended (or contracted) (see the arrow in Figure 1) and the operating lever 16 is pushed or pulled, the screw 4 will be extended to the maximum (or contracted to the minimum).
Sh.

(a) Due to mechanical resistance, a limit switch built into the motor 2 is activated, automatically cutting off the current, and the motor stands still and maintains its position.

By turning the second-stage operation switch 12 ON (or OFF), any extended (or contracted) position can be maintained.

When the operation switch is set to neutral, all relays 13 and 14 are de-energized, a forward rotation (or reverse rotation) circuit is automatically configured, and only the circuit connected to the neutral position detection switch 5 is energized, and all relays 13 and 14 are de-energized. The motor automatically rotates forward (or reverse) until the position detection switch is shut off.

(Effects of the Invention) As listed in the following sections, this device has the following advantages.

l) When converting a conventional manual control type machine to a remote control type machine or using it in combination: 1) The original purpose can be achieved by simply attaching this device as an additional device, without making any changes to the original model of the machine.

2) Since the operating current can be interrupted arbitrarily, any pulp position can be maintained depending on the content of one work. That means the expansion and contraction is just 1! This means that adjustment operations are also possible.

3) If you turn off all the switches (if you let go of the switches), it will automatically return to the neutral position 5, which helps ensure safety.

4) Since it is possible to install it as a single unit, it is only necessary to install it at the necessary location among many valves (operating rods).

5) Compared to other remote control devices, this device is easy to process and install and is inexpensive.

6) In this specification, a three-position valve is used as an example, but if a two-position valve is used, the relay device can be omitted and the cost will be even lower.

7) If zero manual operation is required with this device installed, you can simply operate the existing manual control pulp, and remote control and manual operation can also be used together.

8) In this specification, an example is given in which a remote control cord (wired) is used in consideration of cost, etc.8 However, this is not necessarily a preferable situation considering the turning of the machine, etc., so depending on the case, a radio-controlled wireless method may be used. It is also possible to do so.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention: - Fig. 1 is an enlarged perspective view showing the state in which the device is attached to an operating rod;
The figure is a schematic explanatory diagram of a configuration including an electric circuit. 1...Reducer 2...Motor 3...
・Fore/aft travel control switch 4... Telescopic screw 5... Neutral position detection switch E...
...Automatic return relay device -7-...Switch system? IO part 8... Electromagnetic clutch 10...
...Operation rod 17...Remote control code Dan...Neutral position detection device patent applicant Maeda Seisakusho Co., Ltd.

Claims (1)

[Claims] 1. In a remote control device that is attached as an attachment to the operating rod of a manual control of construction machinery, a switch control section having a dual operation mechanism;
The construction is characterized in that it is equipped with a neutrality detection device including various switches, a speed reducer, a motor, a telescopic screw, and an electromagnetic clutch connected to the control section, and the manual control operation section is used by converting it into a remote control operation. Remote control device for machines, etc.