JP2589547Y2 - Manned / unmanned forklift vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manned / unmanned forklift vehicle.

[0002]

2. Description of the Related Art Forklift vehicles equipped with forklifts include manned ones driven and operated by a driver,
Some are unmanned.

[0003] This unmanned forklift vehicle has, for example, a battery mounted thereon and, as shown in FIG. 3, detects a guide wire 2 laid on the floor 1 with a guide sensor 16 and moves along the guide wire 2. , Automatic driving. Reference numeral 10 denotes a frame of a forklift vehicle, 11 denotes a front wheel, 12 denotes a rear wheel, 13 denotes a fork, 14 denotes a mast, 16 denotes a guide sensor, 17 denotes a travel control device, and 18 denotes a fork control device.

[0004] In order to increase the detection sensitivity, the guide sensor 16 is designed so that the distance from the floor 1 is as small as possible.
The road surface on which the unmanned forklift vehicle travels is attached to the bottom of the vehicle frame 10 and has a high degree of flatness.

[0005]

[Problems to be Solved by the Invention] As described above, in a manned forklift vehicle, a driver drives a car.
For example, there is a case where the vehicle travels on a slope-shaped road surface with low flatness.

For this reason, when a forklift vehicle is a manned / unmanned vehicle, for example, a system in which manned operation is performed at a work station and unmanned operation is performed between work stations, a guide sensor is provided on a slope surface of an unmanned running route. 16 may be damaged by contact with the road surface 1,
In order to prevent this, the distance between the guide sensor 16 and the floor surface 1 must be increased, resulting in a problem that the sensitivity of the guide sensor 16 is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and an object of the present invention is to provide a manned / unmanned forklift vehicle having a guide sensor mechanism which does not interfere with manned driving and can detect with high sensitivity during unmanned driving. Aim.

[0008]

In order to achieve the above object, the present invention raises and lowers the guide sensor by a predetermined distance in a manned / unmanned forklift vehicle equipped with a guide sensor for detecting a guide line laid on a road surface. It has an elevating mechanism, and when the "manned" switching is performed in conjunction with the switching of the manned / unmanned selector switch in the driver's seat, the elevating mechanism raises the guide sensor by the predetermined distance.

[0009]

In the present invention, when the manned / unmanned switch in the driver's seat is switched to the "maned" side, the guide sensor is pulled up.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 20 denotes an elevating mechanism, in this example, an electric cylinder, which is disposed on the bottom 10A side of the vehicle frame 10. The guide sensor 16 is connected and fixed to the lower end of the shaft 21 of the electric cylinder 20. 22, 23 are
These are an upper limit switch and a lower limit switch, respectively, which are provided at predetermined height positions from the bottom 10A of the vehicle frame 10. The guide sensor 16 has a limit switch engagement element 16A protruding therefrom. 17A is a wiring extending from the guide sensor 16 to the travel control device 17. 19
Reference numeral denotes a lever operating handle provided on the driver's seat 15 for lifting the fork.

In FIG. 2, reference numeral 30 denotes a manned / unmanned changeover switch provided on the driver's seat 15 of a manned / unmanned forklift vehicle. When the switch 30 is switched to the contact A side, the manned mode command is sent to the traveling control device 17 and the fork. Control device 1
When the switch is switched to the contact B side, an unmanned mode command is sent to the travel control device 17 and the fork control device 18 and a pull-down command is given to the electric cylinder 20.

In this embodiment, the manned / unmanned switch 30 is switched to the contact A side, and the electric cylinder 20
When a lifting command is given to the electric cylinder 20
For example, the shaft 21 is driven to rotate upward by positive rotation. Thus, the guide sensor 16 is raised, the limit switch engaging member 16A is engaged with the upper limit switch 22, the output of the upper limit switch 22 is inputted to the electric cylinder 20 as a stop command, according to the electric cylinder 20 <br / Then, the guide sensor 16 stops. This stop position is shown in FIG.
Shown by chain lines. The pull-up position of the guide sensor 16 may be any height as long as the guide sensor 16 does not come into contact with the road surface even on the slope surface where the vehicle may travel by manned driving.

When a pull-down command is given to the electric cylinder 20, the electric cylinder 20 rotates in the reverse direction to drive the shaft 21 downward. Thus, pulled down the guide sensor 16, the limit switch when the engaging member 16A engages the lower limit switch 23, the output of the lower limit switch 23 is input to the electric cylinder 20 as a stop command, therefore the guide sensor 16 to the electric cylinder 20
Stops. This stop position is the position indicated by the solid line in FIG.

[0015]

[Effects of the Invention] As described above, according to the present invention, a guide sensor that is not used during manned driving can be raised to a position at a large distance from the road surface during manned driving. The vehicle can travel freely even on a low road surface without causing contact damage of the guide sensor.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a circuit diagram of the embodiment.

FIG. 3 is a schematic configuration diagram of an unmanned forklift vehicle.

[Explanation of symbols]

 Reference Signs List 10 vehicle frame 16 guide sensor 20 electric cylinder as elevating mechanism 22 upper limit switch 23 lower limit switch 30 manned / unmanned switch

Claims (1)

(57) [Scope of request for utility model registration] 1. A manned / unmanned forklift vehicle having a guide sensor for detecting a guide line laid on a road surface, comprising a lifting mechanism for moving the guide sensor up and down by a predetermined distance, and switching between a manned and unmanned driver's seat. A manned / unmanned forklift vehicle, wherein the lifting mechanism raises the guide sensor by the predetermined distance when the "maned" switching is performed in conjunction with the switching of the switch.