JP2002114487A - Emergency stop device for mobile crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability, to prevent misoperation and a break to improve safety, and to simplify a structure to reduce costs, in an emergency stop device for a mobile crane. SOLUTION: In this emergency stop device 5 for the mobile crane, an emergency stop switch 8 for stopping operation of an engine of the mobile crane or other operation means in an emergency is connected to a control means 9 such as a solenoid controlling the engine or the other operation means. The switch 8 can be separated from a machine body and be portably carried inside and outside the machine body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency stop device for a mobile crane, and more particularly, to an emergency stop device.
The present invention relates to an emergency stop device for a mobile crane in which a part or all of the operation of the mobile crane is emergency stopped using a remote control switch.

[0002]

2. Description of the Related Art A conventional emergency stop device for a mobile crane of this type will be described with reference to FIG. In the figure, reference numeral 1 denotes an emergency stop device. The emergency stop device 1 has a plurality of emergency stop switches 3, 3,... Connected in series to a power supply 2, and the emergency stop switches 3, 3,. Are connected in series to a control means 4 such as a solenoid for controlling other operation means such as a pump, a motor or an actuator, and the engine is stopped via the control means 4 by operating the emergency stop switches 3, 3,. Alternatively, other operating means are configured to be stopped.

A plurality of the emergency stop switches 3, 3... Are provided on the driver's seat and the outer periphery of the machine body, and when the operator gets on the machine body other than the driver's seat for work or maintenance, or enters the machine body. In this case, when the driver starts the engine without noticing the operator, the operator stops the emergency stop switch 3, 3
Press… to stop the engine, or
In addition, it is provided to prevent an accident by stopping the operating means.

However, even if the plurality of emergency stop switches 3, 3... Are installed, the emergency stop switches 3, 3 are difficult to reach or difficult to operate depending on the location where the worker performs work or maintenance. 3 ... may occur. In order to avoid this, it is necessary to further increase the number of emergency stop switches 3, 3,... When such a large number of emergency stop switches 3, 3,. Since it is necessary to set the mounting position, the mounting method, and the mounting shape for each model and each part, the mounting cost increases. In addition, there is a possibility that the emergency stop switches 3, 3,... Are erroneously operated, or the emergency stop switches 3, 3,.

The emergency stop switches 3, 3,... May be damaged and the operation of the machine may become impossible due to the damage. To prevent this, the emergency stop switches 3, 3,. Although there is a method of protecting by attaching a lid, the convenience in handling deteriorates when the lid is attached.

Therefore, in the emergency stop device of the mobile crane, the operability is improved, the operation is prevented by eliminating the risk of erroneous operation and damage, and the structure is simplified to reduce the cost. The technical problem to be solved arises, and the present invention aims to solve this problem.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and a control means for controlling an engine or other operating means of a mobile crane is provided with the engine or other operating means in an emergency. It is an object of the present invention to provide an emergency stop device for a mobile crane in which an emergency stop switch for stopping the vehicle is connected, and the emergency stop switch is separated from the body and provided to be portable inside and outside the body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. In FIG. 1, reference numeral 5 denotes an emergency stop device. The emergency stop device 5 has one or several connectors 7, 7,... Connected in series to a power source 6, and includes one of the connectors 7, 7,. For example, an emergency stop switch 8 for emergency stop of the engine or other operating means is connected to the emergency stop switch 8, and the emergency stop switch 8 controls the engine or other operating means such as a pump, a motor or an actuator. Control means 9 such as a rotating solenoid
Are connected in series. The operation of the emergency stop switch 8 stops the engine via the control means 9 or stops other operating means.

The emergency stop switch 8 is installed in a switch box 10 shown in FIG. 2 and is provided separately from the body, that is, connected to the connector 7 via a wire 11 having an appropriate length. The wiring 11 makes the switch box 10 portable together with the switch box 10 inside and outside the machine. The emergency stop switch 8 is connected by wire through the wiring 11. However, the emergency stop switch 8 may be connected by radio using signal transmission means such as radio waves, sound waves, light, or magnetism.

Further, when several connectors 7 are provided, connectors 7, 7,... For connecting the emergency stop switch 8 can be selected, and the connectors 7, 7,. 12 and fuel tank cover 1
3 and so on.

When the operator gets on the body other than the driver's seat for work or maintenance, or enters the body, the operator operates the switch box 10 provided with the emergency stop switch 8. Carry out work or maintenance, etc.,
Should the driver start the engine without noticing the operator, the operator stops the engine by pressing the emergency stop switch 8 of the switch box 10 carried, or stops other operating means. Emergency stop of all or part of the aircraft.

Thus, since the emergency stop switch 8 is one and is portable, it can be operated quickly at hand, and can hit an object or accidentally activate the emergency stop switch. The risk of erroneous operation due to this operation is extremely reduced, safety is ensured, and the risk of damage to the emergency stop switch is also eliminated. In addition, the structure becomes simple, which contributes to cost reduction.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0014]

As described in detail in the above embodiment, the present invention provides an emergency stop for controlling the engine or other operating means of a mobile crane for emergency stop of the engine or other operating means in an emergency. Since the switch is connected and the emergency stop switch is provided so as to be portable inside and outside of the aircraft while being separated from the aircraft,
By being individual and portable, quick operation at hand is possible, and the risk of erroneous operation due to collision with an object or erroneous activation of the emergency stop switch is extremely reduced and safety is ensured. At the same time, there is no danger of the emergency stop switch being damaged. In addition, the structure is simplified, which contributes to cost reduction.

As described above, the present invention provides an emergency stop device for a mobile crane that can improve operability, eliminate the risk of erroneous operation and damage, and improve safety.
This is an invention that has an extremely significant effect, such as simplifying the configuration and contributing to cost reduction.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of an emergency stop device according to an embodiment of the present invention.

FIG. 2 is a plan view of the emergency stop switch shown in FIG.

FIG. 3A is a sectional view taken along line AA of FIG. 3B. (B) The top view of the revolving super structure of a mobile crane. (C) BB sectional drawing of the upper figure (b).

FIG. 4 is a circuit diagram of an emergency stop device, showing a conventional example.

[Explanation of symbols]

 5 Emergency stop device 8 Emergency stop switch 9 Control means

Claims (1)

[Claims] An emergency stop switch for emergency stop of the engine or other operating means in an emergency is connected to a control means of an engine or other operating means of a mobile crane, and the emergency stop switch is separated from an airframe. An emergency stop device for a mobile crane, wherein the emergency stop device is provided so as to be portable inside and outside the machine.