JPH10167691A - Operating device of fork lift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable anyone to do fine adjustments simply without requiring any skilled labor for the fine adjustments at a low speed area by installing a push button, limiting a chopper rate to less than a certain fixed value, in a material handling operating lever. SOLUTION: A traveling operation lever and three types of material handling operating levers 8 indicating the traveling direction and speed of a material handling gear are set up in a driver's cab. When a lift lever, moving an inner form of a material handling operating lever 8 up and down, is slightly tilted, a lift speed shifts at low speed at a chopper rate of about 80%. In addition, when it is tilted at the maximum angle, the lift speed sifts at high speed at the chopper rate of about 100%. In addition, a limit switch turning to the chopper rate of about 50% is installed in a push button 9 in an upper part of the lift lever. In brief, in the ordinary lift work, it is carried out without pushing this push button 9. In succession, only at a time when fine adjustments for lift height is intended to be done, the lift lever is tilted as pushing the push button 9, whereby the fine adjustments are made achievable irrespective of a tilting angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forklift operating device capable of restricting the moving speed of a forklift cargo handling device to a predetermined value or less or to a predetermined ratio.

[0002]

2. Description of the Related Art For example, in a conventional reach-type forklift, when it is desired to move a cargo handling device at a low speed, the speed is adjusted by tilting a cargo handling operation lever by a small amount.

[0003]

After the cargo handling device is moved at high speed, it is moved at low speed for positioning. However, in the above-described structure, the relationship between the tilt angle of the loading / unloading operation lever and the moving speed of the loading / unloading device cannot be known unless it is an expert, and it is necessary to get used to speed adjustment. Further, even a skilled person could not make a fine speed adjustment in a low speed range, so that the position of the cargo handling device could not be determined.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a vehicle body and a mast for moving a load up and down in front of the vehicle body, and a loading operation lever is tiltably disposed on a driver's seat of the vehicle body. In a forklift operating device that changes the chopper rate according to the
The above-mentioned problem is solved by providing a cargo handling operation lever with a push button for limiting the chopper ratio to a certain fixed value or less.

[0005] Further, the pushbutton provided on the cargo handling operation lever may be a pushbutton for changing the chopper ratio to a certain ratio, and may be the above-described forklift operating device.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will now be given of a case where the present invention is applied to a reach type forklift. In FIG. 2, a reach type forklift 1 includes a vehicle body 2, a cargo handling device 3 in front of the vehicle body 2,
A driver's seat 4 is provided at the rear of the vehicle body 2. A fork 5 for loading a load is disposed on the cargo handling device 3, and a cab 6 is disposed on the driver's seat 4.

The cab 6 is provided with a traveling operation lever 7 for instructing a traveling direction and a traveling speed of the vehicle body 2 and a cargo operation lever 8 for instructing a moving direction and a traveling speed of the cargo handling device 3. , A reach lever 8A for moving the cargo handling device 3 back and forth (reach), a tilt lever 8B for tilting the fork 5 back and forth, and a lift lever 8C for moving the fork 5 up and down (lift).

The lift lever 8C capable of implementing this embodiment most effectively is a device which has been used most conventionally and has a two-stage chopper ratio of low speed and high speed.

In the first embodiment, for example, the lift lever 8C
Is provided with two limit switches inside the driver's seat 4. When the lift lever 8C is slightly tilted, the low speed limit switch is turned on, and the lift speed moves at a low speed at a chopper ratio of 80%. When the lift lever 8C is further tilted at the maximum angle, the high-speed limit switch is turned on, and the lift speed moves at a high speed at a chopper ratio of 100%.

In the present invention, a limit switch having a chopper ratio of 50% as shown in FIG. 1 is arranged on the push button 9 above the lift lever 8C, in addition to the above-described two-stage chopper ratio limit switch.

That is, the worker performs the work at the two-stage lift speed of the low speed and the high speed as in the conventional manner without pressing the push button on the lift lever 8C in the normal lift work. And only when you want to make fine adjustments to the lift height,
By tilting the lift lever 8C while pressing the push button 9, fine adjustment can be performed regardless of the tilt angle.

In the second embodiment, by pressing the push button 9 above the lift lever 8C, the chopper ratio is usually set to 80 according to the tilt angle of the lift lever 8C.
Devices that change at a rate of 40% to 50%
If the device is changed to the ratio of%, fine adjustment of the lift height can be performed by pressing the push button 9 as described above.

[0013]

As described above, in the operating device according to the present invention, fine adjustment in the low-speed range does not require skill, and anyone can easily perform the fine adjustment simply by pressing the push button on the upper part of the loading operation lever. It becomes possible to carry out the cargo handling work quickly and reliably.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lift lever according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a reach type forklift embodying the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reach type forklift 2 Body 3 Cargo handling equipment 4 Operator's cab 5 Fork 6 Cabin cab 7 Travel operation lever 8 Cargo operation lever 8A Reach lever 8B Tilt lever 8C Lift lever 9 Push button

Claims (2)

[Claims] A load handling lever is provided on a driver's seat of the vehicle body so as to be tiltable, and a chopper ratio is changed according to a tilt angle of the cargo handling lever. A forklift operating device for controlling a moving speed of a forklift, wherein the forklift operating device includes a pushbutton for restricting the chopper ratio to a certain value or less. 2. The forklift operating device according to claim 1, wherein the push button provided on the cargo handling operation lever is a push button for changing a chopper ratio to a certain ratio.