JPH0530095U - Operating device for forklift trucks - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide an operating lever device for a forklift vehicle that can move the lifting lever to an optimum position where the driver can easily operate. . [Configuration] At least a lifting lever 12, and an operation of the lifting lever 12 is converted into an electric signal by a displacement / electrical signal converter 21B and input to a controller 20.
Cylinder 5 for raising and lowering the fork based on the input electric signal
In a forklift vehicle operating device that controls the valve opening of the proportional control valve 7 that supplies and discharges pressurized fluid to and from, the controller 20 is fixedly arranged, but the lifting lever 12 and the displacement / electric signal converter are arranged. 21B is provided in a portable operation box 22,
The signal line 23A connecting the controller 20 and the displacement / electrical signal converter 21B is arranged to be expandable and contractable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an operating device for a forklift vehicle.

[0002]

[Prior Art]

 Hereinafter, a conventional technique will be described with reference to the drawings.

In FIG. 3, reference numeral 1 denotes a vehicle body of a forklift vehicle driven by a battery, 1A denotes wheels, and 2 denotes a tilt mechanism (not shown) including a horizontal / tilting cylinder 4 on the front surface of the vehicle body 1. It is a mast supported through. Denoted at 3 is a fork for loading and unloading a load, which is supported by the mast 2 via a lifting mechanism (not shown) having a lifting cylinder 5. The horizontal / tilting cylinder 4 is connected to a hydraulic pump 8 via a proportional control valve 6, and the lifting cylinder 5 is linked to the hydraulic pump 8 via a proportional control valve 7. Reference numeral 9 is a motor of the hydraulic pump 8. An oil tank 10 is connected to the proportional control valve 6, the proportional control valve 7, and the hydraulic pump 8, respectively. Reference numeral 11 is a horizontal / tilting lever, and 12 is a lifting lever, both of which are fixedly arranged on the operator's cab 13. The lever operation angle and operation direction of the horizontal / tilting lever 11 are detected by the displacement / electrical signal converter 21A, and the lever operation angle and operation direction of the lifting lever 12 are detected by the displacement / electrical signal converter 21B. Then, these detection signals (lever angle signals) are sent to the controller 20.

The controller 20 inputs the detection signals of the displacement / electrical signal converters 21A and 21B to give a driving / stopping command to the motor 9 of the hydraulic pump 8 and also a horizontal / tilt valve opening command. The proportional control valve 6 is provided with an elevator opening / closing command to the proportional control valve 7. As a result, the proportional control valve 6 and the proportional control valve 7 are opened with the degree of valve opening corresponding to the lever operating angle and operating direction of the levers 11 and 12, and the hydraulic fluid is passed through the pipe and the horizontal / tilting cylinder 4 is opened. , And the ascending / descending cylinder 5, and the forks 3 move up and down and horizontally / tilt.

[0005]

[Problems to be solved by the device]

 Since the conventional lifting and lowering levers of the forklift vehicle are fixed to the driver's cab of the forklift vehicle, individual differences in body shape of the person who drives the forklift vehicle, for example, differences in height and arm length. Due to the difference in height, it may be difficult to operate, and there is a problem that the fork up / down and horizontal / tilt control cannot be performed smoothly, especially during loading and unloading work.

The present invention was made in order to solve this problem. Therefore, a driver of a forklift truck can move a lifting lever or the like to an optimum position that is easy to operate. It is an object of the present invention to provide a control device for a lift truck.

[0007]

[Means for Solving the Problems]

 At least the raising / lowering lever and the operation of the raising / lowering lever are converted into an electric signal by the displacement / electric signal converter and input to the controller, and the controller is a fork based on the input electric signal. In a forklift vehicle operating device that controls the valve opening of a proportional control valve that supplies and discharges pressurized fluid to an elevating cylinder, the controller is fixedly arranged, but the elevating lever and displacement / electric signal converter Is provided in a portable operation box, and a signal line connecting the controller and the displacement / electrical signal converter is wired so as to be expandable and contractable.

[0008]

[Action]

 In the forklift vehicle operation lever device of the present invention described above, the driver of the forklift vehicle can move the lifting lever and the like to an optimum position that is easy to operate.

[0009]

【Example】

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

In FIGS. 1 and 2, reference numeral 22 denotes a portable operation box in which both the horizontal / tilting lever 11 and the lifting lever 12 are mounted on the operation box 22. The displacement / electrical signal converter 21A is attached to the horizontal / tilting lever 11 and the displacement / electrical signal converter 21B is attached to the operation box 22 so as to correspond to the lifting lever 12 respectively.

The controller 20 is fixedly arranged in the body 1 of the forklift vehicle, and is connected to the displacement / electrical signal converter 21A and the displacement / electrical signal converter 21B by signal lines 23A and 23B, respectively. There is.

Reference numeral 24 is an arm member of a fixed length, which has a folding fulcrum portion 24A at the center and is a mechanism which can be folded and supported with the folding fulcrum portion 24A as a reference. The arm member 24 has a plurality of rings 25 arranged and fixed at regular intervals on the arm member 24 so as to be orthogonal to the front-rear direction. One end of the arm member 24 is connected to the side wall 22A of the operation box 22, and the other end is driven. It is attached to a support mechanism 26 provided on the table 13.

The support mechanism 26 supports the operation box 22 in multiple directions via an arm member.

The signal lines 23A and 23B both extend from the cab 13 for a certain length, pass through the rings 25 on the arm member 24, and pass through the controller 20 and the displacement / electric signal converters 21A and 21B. Is wired to. Other than that, the control method of each valve 6, 7 of the controller 20 is the same as the conventional technique.

In this embodiment, the operation box 22 (such as the lifting lever) is moved by folding and extending the arm member based on the folding fulcrum portion 24A of the arm member 24, and moving it forward and backward. Since the position in the direction is adjusted and the position in the left-right direction is adjusted by the support mechanism 26, the driver of the forklift vehicle moves the operation box 22 (the lifting lever, etc.) to an optimum position that is easy to operate. be able to.

Further, at this time, since the signal lines 23A and 23B expand and contract (bend) in association with folding and expansion fluctuations of the arm member 24, they do not hinder the operation of the driver of the forklift truck. Complete.

The method of accommodating the signal lines 23A and 23B in this embodiment is one example, and the invention is not limited to this embodiment. For example, the signal lines 23A and 23B are wound and accommodated. A reel mechanism may be used.

[0018]

[Effect of the device]

 As described above, according to the present invention, the driver of the forklift truck can move the lifting lever and the like to the most suitable position that is easy for him to operate. It has the effect of smoothly moving up and down and leveling / tilting.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of an operating device for a forklift vehicle as an embodiment of the present invention.

FIG. 2 is a schematic view of an operating device for a forklift truck as an embodiment of the present invention, viewed from above.

FIG. 3 is a schematic vertical sectional view of a conventional forklift vehicle.

[Explanation of symbols]

 4 Horizontal / tilting cylinder 5 Elevating cylinder 6,7 Proportional control valve 11 Horizontal / tilting lever 12 Elevating lever 20 Controller 21A, 21B Displacement / electric signal converter 22 Operation box 23A, 23B Signal line 24a -Mum member 24A Folding fulcrum part 25 Ring 26 Support mechanism

Claims (1)

[Scope of utility model registration request] 1. A lifting / lowering lever, and an operation of the lifting / lowering lever, which is converted into an electric signal by a displacement / electrical signal converter and is inputted to a controller, the controller being based on the inputted electric signal. In a forklift vehicle operating device that controls the valve opening of a proportional control valve that supplies and discharges pressurized fluid to and from the fork lift cylinder, the controller is fixedly arranged, but the lift lever and displacement / electric The signal converter is installed in the portable operation box,
An operating device for a forklift vehicle, wherein a signal line connecting the controller and the displacement / electrical signal converter is extensible.