JPH0632472U - Safe traveling device for mobile cranes - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the crane vehicle from moving without forgetting to return arm A to the storage position. [Structure] The control device 4 detects / determines that the arm A is in the non-retracted position via a lift switch 1 serving as a first sensor, and the brake is released via a side brake switch 2 serving as a second sensor. When it is detected / determined that the vehicle is present, the alarm device 3 and / or the vehicle traveling stop device 5 is activated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safe traveling device for a mobile crane equipped with an arm that is selectively placed in a retracted position or a non-retracted position.

[0002]

[Prior art]

 In order to prevent an accident in which a crane vehicle travels with an arm raised and collides with a structure and damages the structure, the applicant of the present invention, in Utility Model Publication No. 63-155808, discloses that a crane A technique is disclosed in which the vehicle is stopped and the crane operation is stopped by a signal from a switch that detects an operation.

[0003]

[Problems to be solved by the device]

 However, the technique described above has a problem in that it is insufficient in terms of safety management because it detects whether or not the crane is operating after the vehicle has traveled and stops the vehicle.

It is an object of the present invention to provide a safe traveling device for a crane vehicle that issues an alarm or stops traveling of the vehicle if the crane is in the non-retracted position even when the crane is not operating.

[0005]

[Means for Solving the Problems]

 The present invention provides a first sensor for detecting a non-retracted position of an arm, a second sensor for detecting running of a vehicle, an alarm device for issuing an alarm by inputting signals of the first sensor and the second sensor, And / or a control device that operates a vehicle travel stop device that stops the travel of the vehicle.

[0006]

[Explanation of effects]

 In the safe traveling device for a mobile crane constructed as described above, when the work is stopped while the arm is being raised, the first sensor detects the non-retracted position of the arm, and when the vehicle is about to travel, Since the two sensors detect vehicle travel, the signals from the first and second sensors are input to the control device to activate the alarm device and / or the vehicle travel stop device, and an alarm is generated and / or the vehicle travels. Since the car is stopped, the crane vehicle can drive safely.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a schematic configuration diagram of a safe traveling device for a mobile crane according to the present invention, showing a state in which an arm A is located at a retracted position. In the drawing, the present safe traveling device is composed of a first sensor ascending switch 1, a second sensor as a side brake switch 2, an alarm device 3, a control device 4, and the like. The raising switch 1 is for urging a hydraulic mechanism (not shown), and is turned on when the arm A is in a workable state, that is, in a non-retracted position, and is in a traveled retracted position. When turned off, it is turned off. The side brake switch 2 is provided at the base end of the side brake S and is turned on when in the released position, that is, in the vehicle traveling state, and is turned off when in the non-released position, that is, when the crane is in the working state. The alarm device 3 is arranged on, for example, an instrument panel and notifies the driver by a buzzer, a voice or a lamp. The control device 4 is composed of an electric circuit including CPU and is connected to the raising switch 1, the side brake switch 2 and the alarm device 3 by wiring.

Next, the operation of the safe traveling device for a mobile crane according to the present invention will be described with reference to FIGS. 2 and 3. In the figure, the control device 4 determines whether or not the side brake S is released by a signal from the side brake switch 2 during operation (step S1). If YES, it is determined whether or not the raising switch 1 is ON (step S2). If YES, the control device 4 activates the alarm device 3, causes the buzzer to sound, generates a sound, or lights the lamp (step S3), and turns off the alarm device 3 several seconds after the alarm device 3 operates (step 4). ). If the steps S1 and S2 are NO, the control device 4 does not activate the alarm device 3 and the vehicle can travel safely.

In the present embodiment, the control device 4 actuates the alarm device 3, but in FIGS. 4 and 5, the vehicle travel stop device 5 is actuated instead of the alarm device 3. The vehicle travel stopping device 5 may be, for example, a known device that cuts the fuel injection amount by interlocking with a rack bar that adjusts the fuel injection amount, or a device that locks the parking position by interlocking with a transmission. In this case, the control device 4 operates the vehicle stopping device 5 if the results of the determination as to whether or not the side brake S is released by step S1 and S2 and whether the raising switch 1 is ON are both YES. , Prevent the vehicle from traveling (step S5).

Furthermore, according to the present invention, the combined use of the alarm device 3 and the vehicle travel stopping device 5 is not a problem in any way, and is rather preferable for safety management.

In the above description, the raising switch 1 detects whether or not the arm A is located at the non-storing position, but the present invention is not limited to this, and the arm A and the vehicle are not limited thereto. There is no problem even if the distance to an immovable base point such as both roofs is detected. Therefore, the crane truck does not travel with the arm A being in the non-retracted position.

[0013]

[Effect of device]

 Since the present invention is configured as described above, the crane vehicle does not run with the arm raised, so that an accident that collides with and damages a structure can occur.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a control system diagram of the present invention.

FIG. 3 is a flow chart of the control of the present invention.

FIG. 4 is another control system diagram of the present invention.

FIG. 5 is a flow chart of another control of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st sensor rise switch 2 ... 2nd sensor side brake switch 3 ... Alarm device 4 ... Control device 5 ... Vehicle stop device

Claims (1)

[Scope of utility model registration request] 1. A safe traveling device for a mobile crane having an arm selectively located in a storage position or a non-storage position, a first sensor for detecting a non-storage position of the arm, and a vehicle for detecting travel of the vehicle. Two sensors, an alarm device that receives the signals from the first sensor and the second sensor and issues an alarm, and / or a control device that operates a vehicle travel stop device that stops traveling of the vehicle are provided. Safe traveling device for mobile cranes.