JPH0725598A - Cargo handling control device of industrial battery vehicle - Google Patents

Abstract

PURPOSE:To provide a cargo handling control device of an industrial battery vehicle capable of improving fine cargo handling operation. CONSTITUTION:When a fine cargo handling operation switch 12 provided on a lift lever 9 is switched on, an ON signal is input to a traveling cargo handling controller 20. When the ON signal is input to the traveling cargo handling controller 20 in accordance with a detection signal of a traveling potentiometer 24, the number of rotation of an electric motor 14 for cargo handling is controlled. Additionally, while the cargo handling fine operation switch is switched on, even if an accelerating pedal is stepped on, an electric motor 25 for travelling is not rotated. Consequently, by two means of the pedal 10 and the lever 9, a fork is operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cargo handling control device for a battery type industrial vehicle.

[0002]

2. Description of the Related Art Conventionally, in a battery-powered forklift,
The opening amount of the control valve and the rotation speed of the electric motor for cargo handling are controlled based on the operation amount of the lift lever provided in the driver's seat to adjust the amount of hydraulic oil sent to the lift cylinder. As shown in FIG. 11, the hydraulic pump 40 is driven by an electric motor 41 for cargo handling, sucks up hydraulic oil stored in an oil tank 42, and supplies the hydraulic oil to a control valve (hereinafter referred to as C / V) 43. It is like this. A lift lever 44 is connected to the C / V 43. By operating the lift lever 44, the valve opening of the C / V 43 is changed, and the amount of hydraulic oil sent to the lift cylinder is adjusted.

The lift lever 44 includes a lift lever 44
The cargo handling potentiometer 45 for detecting the operation amount of the cargo handling potentiometer 45 is provided, and the cargo handling potentiometer 45 is connected to the input side of the traveling cargo handling controller 46. The cargo handling electric motor 41 is connected to the output side of the traveling cargo handling controller 46, and the rotation speed of the cargo handling electric motor 41 is controlled based on the detection signal of the cargo handling potentiometer 45.

The vertical movement of the fork is performed by operating the lift lever 44. When the lift lever 44 is operated, the cargo handling potentiometer 45 detects the operation amount of the lift lever 44,
The detection signal is input to the traveling cargo handling controller 46. The traveling cargo handling controller 46 determines the rotation speed of the cargo handling electric motor 41 based on the detection signal, and drives the cargo handling electric motor 41 in accordance with the rotation speed. On the other hand, the valve opening of the C / V 43 is also determined by the operation amount of the lift lever 44, a predetermined amount of hydraulic oil is sent to the lift cylinder, and the fork moves up and down.

That is, the rotation amount of the cargo handling electric motor 41 and the valve opening of the C / V 43 are determined by the operation amount of the lift lever 44, and when the manipulation amount changes, the cargo handling electric motor 41.
And the valve opening degree of C / V 43 also change in proportion. For example, when the manipulated variable is small, the valve opening of the C / V 43 is small and the rotation speed of the cargo handling electric motor 41 is also low. When the operation amount is large, the valve opening of the C / V 43 is large and the rotation speed of the cargo handling electric motor 41 is also high.

On the other hand, traveling of the forklift is performed by the accelerator pedal 47 located in the driver's seat. As shown in FIG. 11, the accelerator pedal 47 includes an accelerator pedal 47
Travel potentiometer 4 for detecting the amount of depression
8 is provided, and the traveling potentiometer 48 is connected to the input side of the traveling cargo handling controller 46. The traveling electric motor 49 is connected to the output side of the traveling cargo handling controller 46, and the rotation speed of the traveling electric motor 49 is controlled based on the detection signal of the traveling potentiometer 48. Therefore, by operating the accelerator pedal 47, the rotational speed of the electric motor 49 for traveling is controlled and the traveling speed is determined.

[0007]

By the way, in the engine type forklift, the hydraulic pump is driven by the power of the engine to supply the hydraulic oil to the C / V. Further, an inching pedal is provided in the driver's seat, and the engine power transmitted to the drive wheels is adjusted by the depression amount of the inching pedal.

When the fork is moved up and down, the inching pedal is depressed so that the engine power is not transmitted to the drive wheels, the engine speed is adjusted by the accelerator pedal, and the C / V valve opening is adjusted by the lift lever. Adjust.
That is, the engine speed and the valve opening can be independently adjusted by the accelerator pedal and the lift lever, which is very advantageous when performing a delicate operation of the fork.

However, in the battery type forklift, the number of rotations of the cargo handling electric motor 41 and the valve opening degree of the C / V 43 can be adjusted only by the lift lever 44, and the fine operation of the fork is inferior to the engine type forklift. There was a problem.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cargo handling control device for a battery-operated industrial vehicle capable of improving the fine manipulation of cargo handling.

[0011]

In order to solve the above problems, hydraulic oil is supplied to a traveling electric motor for traveling a vehicle, a traveling operation member operated for traveling the vehicle, and a cargo handling hydraulic device. Hydraulic pump, a cargo handling electric motor for driving the hydraulic pump, a cargo handling operating member operated to operate the cargo handling hydraulic device, and the cargo handling operating member provided between the cargo handling hydraulic device and the hydraulic pump. The control valve that adjusts the flow rate of hydraulic oil based on the operation amount of the traveling operation member and the rotation speed of the traveling electric motor based on the operation amount of the traveling operation member, and the electric motor for cargo handling based on the operation amount of the cargo handling operation member. In a cargo handling control device for a battery-powered industrial vehicle, which comprises a controller for controlling the number of rotations of a motor, a fine operation mode setting for setting a fine operation mode for fine handling of cargo When a fine operation mode is set by the switch, the controller stops the control of the traveling electric motor and also stops the control of the cargo handling electric motor based on the operation amount of the cargo handling operation member to drive the vehicle. The gist is a cargo handling control device for a battery-powered industrial vehicle, which is characterized in that it is switched to control of a cargo handling electric motor based on an operation amount of an operating member.

[0012]

When the fine operation mode setting switch is operated to enter the fine operation mode, the controller stops controlling the traveling electric motor based on the operation of the traveling operation member, and
The control of the electric motor for cargo handling based on the operation of the cargo handling operation member is also stopped. Then, instead, the controller controls the rotation speed of the cargo handling electric motor based on the operation amount of the traveling operation member.

As a result, in the fine operation mode, the cargo handling electric motor for driving the hydraulic pump is controlled by the traveling operation member. Then, the cargo handling operation member adjusts only the opening degree of the control valve. Therefore, the control valve and the cargo handling electric motor are controlled by different operating members, and a wide variety of cargo handling operations (fine operations) are possible.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIGS.
It will be described with reference to FIG. FIG. 2 is a side view of the forklift. On the front surface of the vehicle body of the forklift 1, a mast device 2 that is vertically long is provided,
The mast device 2 is tilted in the front-rear direction due to the expansion and contraction of the tilt cylinder 3 extending from the front part of the vehicle. Further, the mast device 2 is provided with a fork 4 having an L-shaped cross section for moving up and down the cargo. The fork 4 is moved up and down by expansion and contraction of a lift cylinder 5 provided at the rear of the mast device 2.

A pair of left and right drive wheels 6 are provided on the lower surface of the front part of the vehicle body of the forklift 1, and a driver's seat 7 for an operator to operate the forklift 1 is provided on the upper side of the vehicle body. A tilt lever 8 and a lift lever 9 are provided within the reach of the operator's hand on the front side of the driver's seat 7, and an accelerator pedal 10 is provided on the lower surface of the driver's seat 7. The tilt lever 8 is for tilting the mast device 2. Further, the lift lever 9 is for lifting and lowering the fork 4, and as shown in FIG. 4, the grip 11 is provided with a cargo handling fine operation switch 12.

Next, in the cargo handling control device of the forklift 1, as shown in FIG. 1, the hydraulic pump 13 is driven by the cargo handling electric motor 14 to suck up the working oil stored in the oil tank 15 to control the control valve ( Below C
/ V) 16 and 17 are supplied with hydraulic oil. Therefore, the hydraulic pump 13 discharges hydraulic oil in proportion to the number of rotations of the cargo handling electric motor 14. C / V16,
A tilt lever 8 and a lift lever 9 are connected to the valve 17, respectively, and the valve openings of the C / Vs 16 and 17 are adjusted according to the operation amounts of the tilt lever 8 and the lift lever 9. The amount of hydraulic oil sent to the tilt cylinder 3 and the lift cylinder 5 is adjusted by the valve opening of the C / V 16 and 17.

The tilt lever 8 is provided with a cargo handling limit switch 18 and is connected to the input side of the traveling cargo handling controller 20. The lift lever 9 includes a cargo handling limit switch 21, a cargo handling potentiometer 22 for detecting an operation amount of the lift lever 9, and a cargo handling fine operation switch 12.
Are provided and are respectively connected to the input side of the traveling cargo handling controller 20. The accelerator pedal 10 is provided with a travel potentiometer 24 for detecting the amount of depression of the accelerator pedal 10.
Is connected to the input side of the traveling cargo handling controller 20.

On the output side of the traveling cargo handling controller 20,
A traveling electric motor 25 for driving the drive wheels 6 is connected, and the rotational speed of the traveling electric motor 25 is controlled based on a detection signal from the traveling potentiometer 24. That is, as shown in FIG. 5, the traveling cargo handling controller 20 reads out a rotation speed command value of the traveling electric motor 25 that is uniquely determined with respect to the depression amount of the accelerator pedal 10, and based on this command value, the traveling electric motor. 25
To control. The data of the rotation speed command value with respect to the depression amount of the accelerator pedal 10 is stored in advance in a memory provided in the traveling cargo handling controller 20.

An electric motor 14 for cargo handling for driving the hydraulic pump 13 is connected to the output side of the traveling cargo handling controller 20, and the cargo handling limit switches 18, 2 are connected.
Electric motor 14 for cargo handling based on the ON / OFF signal of 1
Is turned on and off. Further, the number of rotations of the cargo handling electric motor 14 is controlled based on the detection signal of the cargo handling potentiometer 22. Then, as shown in FIG. 6, the traveling cargo handling controller 20 uniquely determines the cargo handling electric motor 1 with respect to the operation amount of the lift lever 9.
The cargo handling electric motor 14 is controlled based on the rotation speed command value of 4. The electric motor 14 for cargo handling corresponding to this command value
The rotation speed command value data is stored in advance in a memory provided in the traveling cargo handling controller 20.

The cargo handling fine operation switch 12 provided on the lift lever 9 is connected to the traveling cargo handling controller 20, and when the cargo handling fine operation switch 12 is turned on, an ON signal is input to the traveling cargo handling controller 20. The traveling cargo handling controller 20 enters the fine operation mode when the ON signal is input. When in the fine operation mode, the traveling cargo handling controller 20
Controls the number of revolutions of the cargo handling electric motor 14 based on the detection signal of the traveling potentiometer 24 so that the traveling electric motor 25 is not rotated even when the accelerator pedal 10 is depressed.

In the fine operation mode, the traveling cargo handling controller 20 stops the control of the cargo handling electric motor 14 based on the operation amount of the lift lever 9. Then, as shown in FIG. 7, the traveling cargo handling controller 20 operates the accelerator pedal 1
The cargo handling electric motor 14 is based on the rotation speed command value of the cargo handling electric motor 14 which is uniquely determined with respect to the depression amount of 0.
To control. The data of the rotation speed command value of the electric motor 14 for cargo handling corresponding to this command value is stored in advance in a memory provided in the traveling cargo handling controller 20. Therefore, in the fine operation mode, the tilt lever 8 and the lift lever 9 only adjust the opening degrees of the C / Vs 16 and 22.

Next, the processing executed by the traveling cargo handling controller 20 in the cargo handling control device configured as described above will be described with reference to the flowchart shown in FIG. First, in step 1 (hereinafter referred to as S1), it is determined whether or not the ON signal of the cargo handling fine operation switch 12 is input,
If there is no ON signal, the process proceeds to S2. In S2, the traveling cargo handling controller 20 enters the normal mode and executes the normal control. That is, the traveling cargo handling controller 20 obtains the rotation speed command value based on the operation amount of the lift lever 9 as shown in FIG. Further, the traveling cargo handling controller 20 obtains a rotation speed command value as shown in FIG. 5 based on the depression amount of the accelerator pedal 10, and drives and controls the traveling electric motor 25 so that the rotation speed is equal to the rotation speed command value. Therefore, in the normal control in which the cargo handling fine operation switch 12 is not operated, the opening amounts of the C / Vs 16 and 22 and the discharge amount of the hydraulic oil discharged from the hydraulic pump 13 are controlled based on the operation amount of the tilt lever 8 or the lift lever 9. To be done.
That is, the cargo handling work is performed by the tilt lever 8 or the lift lever 9
Is performed based on the operation amount of the accelerator pedal 10
It is performed by stepping on.

On the other hand, when the cargo handling fine operation switch 12 is operated in S1, the process proceeds to S3 based on the ON signal. In S3, the traveling cargo handling controller 20 enters the fine operation mode to execute the fine cargo handling operation control. That is, the traveling cargo handling controller 20 stops the drive control of the cargo handling electric motor 14 shown in FIG. 6 based on the operation amount of the lift lever 9, and controls the driving electric motor 25 based on the depression amount of the accelerator pedal 10. Stop. Then, the traveling cargo handling controller 20 obtains a rotation speed command value as shown in FIG. 7 based on the depression amount of the accelerator pedal 10, and drives and controls the cargo handling electric motor 25 so that the rotation speed is equal to the rotation speed command value. Therefore, in the fine cargo handling fine operation control in which the fine cargo handling fine operation switch 12 is operated, the C / V is calculated based on the operation amount of the tilt lever 8 or the lift lever 9.
Only the openings of 16 and 22 are adjusted and controlled. Then, based on the depression amount of the accelerator pedal 10, the hydraulic pump 13
The discharge amount of the hydraulic oil discharged from is controlled. That is, in the cargo handling work, the opening degree of the C / Vs 16 and 22 is adjusted based on the operation amount of the tilt lever 8 or the lift lever 9 while the traveling is stopped, and the hydraulic pump 13 is discharged by depressing the accelerator pedal 10. The amount is controlled.

Therefore, in the cargo handling fine operation mode, the discharge amount of the hydraulic pump 13 is controlled by the depression of the accelerator pedal 10, and the opening adjustment of the C / V 16, 22 is controlled by the tilt lever 8 or the lift lever 9. Wider and more detailed cargo handling operations (fine operations) are possible compared to the normal mode.

Since this fine operation mode is a cargo handling operation which is relatively similar to that of the engine type forklift, the cargo handling operation can be performed without a feeling of discomfort even when the engine type forklift shifts to the operation of the battery type forklift.

Further, in this embodiment, the fine operation switch 12
Since the grip is provided on the grip portion 11 of the lift lever 9, both the lever operation and the switch operation can be performed at the same time. Therefore, it is possible to perform the cargo handling work by fine operation without difficulty.

Further, in the present embodiment, the cargo handling fine operation switch 12 is provided on the lift lever 9 and is added only to the lift of the traveling cargo handling controller 20 so that the fine operation mode is set when the switch 12 is operated. It can be implemented easily and at low cost for battery-powered forklifts.

The present invention is not limited to the above embodiments, but may be embodied with the following modifications without departing from the spirit of the invention. (1) Although the lift lever 9 is provided with the cargo handling fine operation switch 12, as shown in FIG. 8, a potentiometer 27 for detecting the depression amount of the inching pedal 26 may be used instead.

That is, when the inching pedal 27 is not depressed, the traveling cargo handling controller 20 enters the normal mode and executes the normal control. That is, the traveling cargo handling controller 20 uses the operation amount of the lift lever 9 as shown in FIG.
The rotation speed command value is obtained as shown in (3), and the cargo handling electric motor 14 is drive-controlled so that the rotation speed becomes the rotation speed command value.
Further, the traveling cargo handling controller 20 uses the accelerator pedal 10
As shown in FIG. 5, the rotation speed command value is obtained based on the stepping amount, and the traveling electric motor 25 is drive-controlled so as to reach the rotation speed of the rotation speed command value.

When the inching pedal 27 is depressed by a predetermined amount, the traveling cargo handling controller 20 enters the simultaneous operation mode and executes the simultaneous operation control. That is, the traveling cargo handling controller 20, as shown in FIG.
The cargo handling electric motor 14 is based on the rotation speed command value of the cargo handling electric motor 14 which is uniquely determined with respect to the depression amount of 0.
To control. Further, the traveling cargo handling controller 20 is shown in FIG.
As shown in, the traveling electric motor 25 is controlled based on the rotation speed command value of the traveling electric motor 25 that is uniquely determined with respect to the depression amount of the accelerator pedal 10. The data of the rotation speed command values of the cargo handling electric motor 14 and the traveling electric motor 25 corresponding to the respective command values are stored in a memory provided in the traveling cargo handling controller 20 in advance.

When the inching pedal 27 is fully depressed, the traveling cargo handling controller 20 enters the cargo handling fine operation mode and executes the cargo handling fine operation control. That is, the traveling cargo handling controller 20 obtains the rotation speed command value as shown in FIG. 7 based on the depression amount of the accelerator pedal 10, and the cargo handling electric motor 14 is set to the rotation speed of the rotation speed command value.
Drive control.

As described above, in the simultaneous operation mode, the rotational speeds of the cargo handling electric motor 14 and the traveling electric motor 25 are simultaneously controlled by the depression amount of the accelerator pedal 10, so that a wide and detailed cargo handling operation during traveling ( (Fine operation)
It becomes possible to do.

(2) The cargo handling fine operation switch 12 may be provided at two positions of the tilt lever 8 and the lift lever 9. With this configuration, when performing a fine cargo handling operation while the tilt lever 8 is being operated, it is possible to save time and effort to reach the lift lever 9 and turn on the fine cargo handling operation switch 12. Of course, it may be provided in a place other than that.

(3) Further, although the present invention has been embodied as a forklift truck, it may be embodied as a battery-operated industrial vehicle equipped with another hydraulic apparatus for cargo handling.

[0035]

As described above in detail, according to the present invention, there is an excellent effect that it is possible to improve the fine handling operation of the battery type industrial vehicle.

[Brief description of drawings]

FIG. 1 is a block diagram showing a cargo handling control device.

FIG. 2 is a side view showing the entire forklift.

FIG. 3 is a flowchart showing an operation of the traveling cargo handling controller 20.

FIG. 4 is a perspective view of a lift lever 9.

5 is an explanatory diagram showing a rotation speed command value of the traveling electric motor 25 based on a depression amount of the accelerator pedal 10. FIG.

6 is an explanatory diagram showing a rotation speed command value of the cargo handling electric motor 14 based on an operation amount of a lift lever 8 or a tilt lever 9. FIG.

FIG. 7 is an explanatory diagram showing a rotation speed command value of the cargo handling electric motor 14 based on a depression amount of the accelerator pedal 10.

FIG. 8 is a block diagram showing another example.

FIG. 9 is an explanatory diagram showing a rotation speed command value of the cargo handling electric motor 14 based on a depression amount of the accelerator pedal 10.

FIG. 10 is an explanatory diagram showing a rotation speed command value of the traveling electric motor 25 based on a depression amount of the accelerator pedal 10.

FIG. 11 is a block diagram showing a conventional cargo handling control device.

[Explanation of symbols]

1 ... Forklift, 2 ... Mast device, 3 ... Tilt cylinder, 4 ... Fork, 5 ... Lift cylinder, 6 ... Drive wheel, 8 ... Tilt lever, 9 ... Lift lever, 10 ... Accelerator pedal, 12 ... Cargo handling fine operation switch, 13 ... Hydraulic pump, 14 ... Electric motor for cargo handling, 16, 17 ... Control valve, 20 ... Travel cargo handling controller, 22 ... Cargo potentiometer, 24 ... Travel potentiometer, 25
… Electric motor for traveling.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 30, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

The lift lever 44 includes a lift lever 44
The cargo handling potentiometer 45 for detecting the operation amount of the cargo handling potentiometer 45 is provided, and the cargo handling potentiometer 45 is connected to the input side of the traveling cargo handling controller 46. Traveling cargo handling control
An electric motor 41 for cargo handling is connected to the output side of the roller 46.
Has been. Then, the traveling cargo handling controller 46
Current and electric current corresponding to the detection signal of the role potentiometer 45
Applying pressure to the cargo handling electric motor 41,
41 is driven.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

The vertical movement of the fork is performed by operating the lift lever 44. When the lift lever 44 is operated, the cargo handling potentiometer 45 detects the operation amount of the lift lever 44,
The detection signal is output to the traveling cargo handling controller 46 . Running
The cargo handling controller 46 controls the cargo handling potentiometer 45.
The electric motor 41 for loading and unloading current and voltage corresponding to the detection signal
The cargo handling electric motor 41 is applied to the current and voltage.
It will be the corresponding number of rotations. On the other hand, the valve opening of the C / V 43 is also determined by the operation amount of the lift lever 44, a predetermined amount of hydraulic oil is sent to the lift cylinder, and the fork moves up and down.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

On the other hand, traveling of the forklift is performed by the accelerator pedal 47 located in the driver's seat. As shown in FIG. 11, the accelerator pedal 47 includes an accelerator pedal 47
Travel potentiometer 4 for detecting the amount of depression
8 is provided, and the traveling potentiometer 48 is connected to the input side of the traveling cargo handling controller 46. An electric motor 49 for traveling is connected to the output side of the traveling cargo handling controller 46 . The traveling cargo handling controller 46 executes the traveling.
Current and voltage corresponding to the detection signal of potentiometer 48
Is applied to the traveling electric motor 49 to drive the traveling electric motor 4
9 is the rotation speed corresponding to the current and voltage. Therefore,
By operating the accelerator pedal 47, the rotation speed of the electric motor for traveling 49 is controlled and the traveling speed is determined.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

On the output side of the traveling cargo handling controller 20,
A traveling electric motor 25 for driving the drive wheels 6 is connected . The traveling cargo handling controller 20 uses the traveling port.
Based on the detection signal of the tension meter 24, the electric motor
The drive of the data 25 is controlled . That is, as shown in FIG. 5, the traveling cargo handling controller 20 reads out a rotation speed command value of the traveling electric motor 25 that is uniquely determined with respect to the depression amount of the accelerator pedal 10, and based on this command value, the traveling electric motor. Control 25. The data of the rotation speed command value with respect to the depression amount of the accelerator pedal 10 is stored in advance in a memory provided in the traveling cargo handling controller 20.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

An electric motor 14 for cargo handling for driving the hydraulic pump 13 is connected to the output side of the traveling cargo handling controller 20, and the cargo handling limit switches 18, 2 are connected.
Electric motor 14 for cargo handling based on the ON / OFF signal of 1
Is turned on and off. In addition, the traveling cargo handling controller
20 is based on the detection signal of the cargo handling potentiometer 22.
Then, the electric motor 14 for cargo handling is driven and controlled.
ing. As shown in FIG. 6, the traveling cargo handling controller 20 controls the cargo handling electric motor 14 based on the rotation speed command value of the cargo handling electric motor 14 that is uniquely determined with respect to the operation amount of the lift lever 9. The data of the rotation speed command value of the cargo handling electric motor 14 corresponding to this command value is as follows:
It is stored in advance in a memory provided in the traveling cargo handling controller 20.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

The cargo handling fine operation switch 12 provided on the lift lever 9 is connected to the traveling cargo handling controller 20.
It When the cargo handling fine operation switch 12 is turned on, the load
The fine control switch 12 sends an ON signal to the traveling cargo handling controller.
Output to the vehicle 20 and the traveling cargo handling controller 20
It becomes a card. When the fine operation mode is entered, the traveling cargo handling controller 20 is based on the detection signal of the traveling potentiometer 24.
Therefore, the electric motor 14 for cargo handling is drive-controlled so that the electric motor 25 for traveling is not rotated even when the accelerator pedal 10 is depressed.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

As described above, in the simultaneous operation mode, depending on the amount of depression of the accelerator pedal 10, the cargo handling electric motor is operated.
The motor 14 and the electric motor 25 for traveling are simultaneously driven and controlled.
Runode, it becomes possible to perform a wide range of fine loading operation (fine operation) during travel.

[Procedure Amendment 8]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure Amendment 9]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

[Figure 8]

Claims (1)

[Claims] 1. A traveling electric motor for traveling a vehicle, a traveling operation member operated for traveling a vehicle, a hydraulic pump for supplying hydraulic oil to a hydraulic apparatus for cargo handling, and a cargo handling for driving the hydraulic pump. Electric motor, a cargo handling operating member that is operated to operate the cargo handling hydraulic device, and a hydraulic pump that is provided between the cargo handling hydraulic device and the hydraulic pump, and that controls the amount of hydraulic oil based on the operation amount of the cargo handling operating member. A control valve that adjusts the flow rate and the rotation speed of the traveling electric motor are controlled based on the operation amount of the traveling operation member, and the rotation speed of the cargo handling electric motor is controlled based on the operation amount of the cargo handling operation member. In a cargo handling control device for a battery-powered industrial vehicle including a controller, a fine manipulation mode setting switch for setting a fine manipulation mode for fine manipulation of cargo handling is provided, When the fine operation mode is set by the switch, the controller stops the control of the traveling electric motor and also stops the control of the cargo handling electric motor based on the operation amount of the cargo handling operation member to operate the traveling manipulation member. A load-handling control device for a battery-powered industrial vehicle, which switches to control of a load-handling electric motor based on quantity.