JP2599065B2 - Forklift side shift device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side shift device used for a forklift.

[0002]

2. Description of the Related Art When lifting a load with a forklift, it is necessary to align the center of the load with the center of the left and right forks in order to handle the load safely. Currently, the center of the load is adjusted using a side shift device. Centered.

[0003]

In the above-mentioned conventional side shift device, the center of the load is adjusted by the driver visually observing the difference between the center of the load and the center of the fork, and then feeling the center of the shift. The side shift device is moved to the left and right with respect to the vehicle body in order to match. However, this operation is difficult for beginners and the like, and it is also difficult for a skilled person to handle luggage in a place where the fork of the fork is high because it is difficult to see with human eyes.

The present invention has been made in view of the above, and the center of the side shift device can be automatically adjusted centering on the luggage to be lifted on the floor, and the luggage is always shifted to the side. It is an object of the present invention to provide a side shift device of a forklift, which can be placed at the center of a fork of the device, can safely handle the load, and can prevent the load from slipping.

[0005]

In order to achieve the above object, a side shift device for a forklift according to the present invention comprises a side shift device for use in a forklift. A load sensor 9a, 9b for detecting an end of the load 14 located in front of the vehicle is provided so as to be independently movable in the left-right direction, and a distance sensor for detecting a moving distance of each of the load detectors 9a, 9b. 13a and 13b are provided,
The lateral shift of the load 14 with respect to the side shift device 4 is calculated from the detection results of the distance sensors 13a and 13b, and based on the result, a signal is output to the side shift drive means to shift the side shift device 4 by the amount of the deviation. And a controller 12 that performs the operations.

[0006]

With the side shift device 4 facing the load 14, the left and right ends of the load 14 are detected by the left and right load detectors 9a, 9a.
b, the positions of the baggage detectors 9a, 9b at this time are detected by the distance sensors 13a, 13b, and the controller 12 calculates the amount of deviation of the position of the baggage 14 with respect to the side shift device 4 from the detection signals. Then, the side shift device 4 is moved by an amount corresponding to the output signal based on the calculation result, and the center thereof is aligned with the center of the load 14.

[0007]

An embodiment of the present invention will be described with reference to the drawings.
In the figure, reference numeral 1 denotes a mast device mounted on a forklift body 2 so as to be tiltable in the front-rear direction, 3 denotes an elevating body which is attached to the mast device 1 so as to be able to move up and down by an elevating device (not shown),
Reference numeral 4 denotes a side shift device attached to the elevating body 3. The side shift device 4 has a general configuration, and a finger board 6 to which a pair of forks 5a and 5b is fixed is fixed to the elevating body 3 so as to be movable in the left-right direction. It is designed to be moved left and right. Reference numeral 8 denotes a guard fixed to the finger board 6.

The guard 8 of the side shift device 4 has a pair of left and right baggage detectors 9a,
9b are respectively provided toward the front. Each of the baggage detectors 9a and 9b can be independently moved to the right by moving devices 10a and 10b including cylinders and the like. Each of the above baggage detectors 9a, 9b
Is a pair of detection sensors 11 separated from each other in the left-right direction.
a and 11b. Then, each of the baggage detectors 9
The sensors 11a and 11b of the controller 12a and the controller 9
And each of the mobile devices 10a, 10b
Is a distance sensor 13a1 for detecting each moving distance.
3b, and these sensors are connected to the controller 1
2 are connected. The cylinder control device 7a of the cylinder device 7 of the side shift device 4 can be operated by an output signal from the controller 12, and the controller 12 controls the side control based on an input signal from the detection sensor. The shift device 4 moves in the left-right direction.

The operation of the above configuration will be described below. By running the forklift, the fork 5 of the side shift device 4
a, 5b are inserted into the pallet on which the load 14 is placed. Next, a deviation between the position of the load 14 in the left-right direction and the center of the side shift device 4 is detected. That is, as shown in FIG. 3, the left and right baggage detectors 9a, 9b
Is moved in the left-right direction using the respective moving devices 10a and 10b to detect the left and right end positions of the load 14. This detection is performed when the inner detection sensor 11a is ON and the outer detection sensor 11b is out of the pair of detection sensors 11a and 11b.
Is turned off, it is determined that the baggage 14 is at the end. At this time, the moving distances of the two moving devices 10a and 10b are detected by the distance sensors 13a and 13b, and the controller 12 calculates the displacement of the position of the load 14 with respect to the center of the side shift device 4 based on the detection signals. Then, the cylinder device 7 is driven via the cylinder control device 7a by the amount of the shift to move the side shift device 4 to a position that coincides with the center of the load 14. In this state, the lifting device is actuated to move up the pallet. After the lifting, the traveling is started after the side shift device 4 is moved to the center of the vehicle body 2.

[0010]

According to the present invention, the center of the side shift device 4 can be automatically adjusted to the center of the luggage to be lifted placed on the floor, and the luggage is always centered on the fork of the side shift device 4. The load can be placed, the luggage can be safely handled, and the load can be prevented from being collapsed.

[Brief description of the drawings]

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

FIG. 2 is a front view showing a main part of the embodiment of the present invention.

FIG. 3 is an explanatory diagram of an operation of the baggage detector.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mast device, 2 ... Body, 3 ... Elevating body, 4 ... Side shift device, 5a, 5b ... Fork, 6 ... Finger board, 7 ... Cylinder device, 7a ... Cylinder device device, 8 ...
Guards, 9a, 9b: luggage detectors, 10a, 10b: moving devices, 11a, 11b: detection sensors.

Claims (1)

(57) [Claims] 1. In a side shift device used for a forklift, baggage detectors 9a and 9b for detecting an end of a baggage 14 located in front of the side shift device 1 are provided on both left and right sides of the side shift device 1, respectively. The baggage detector 9 is provided so as to be movable in the left-right direction.
distance sensors 13a, 13a for detecting the moving distances of a, 9b
b is calculated from the detection results of the distance sensors 13a and 13b, and the lateral shift of the load 14 with respect to the side shift device 4 is calculated. And a controller 12 for outputting a signal to the forklift side device.