JPH09267997A - Multi-functional forklift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To switch the traveling mode in order on the basis of the working order, which is really requested, by providing a traveling mode selecting memory means for previously selecting the traveling mode for storage on the basis of the working order and a traveling mode fetch means for fetching the stored traveling mode in order on the basis of the progress of the work. SOLUTION: A traveling mode selecting memory means 2 is provided with a selecting means 9 for selecting the traveling mode corresponding to the working order and a recognizing means for recognizing the selection such as a memory for storing order of lamps A0-A3 to be lighted in response to the selected traveling mode and order of the selected traveling mode. Each traveling mode stored by the traveling mode selecting memory means can be fetched from the memory in order for change by operating a traveling mode fetching means 3 in response to the progress of the work. Traveling mode switching operation can be thereby reduced to the minimum, and the cargo handling efficiency can be remarkably improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-functional forklift capable of improving the efficiency of cargo handling work by rapidly and sequentially extracting the most suitable traveling modes according to the progress of work.

[0002]

2. Description of the Related Art Hitherto, Japanese Patent Laid-Open No. 5-116643 has been proposed as a reach type multi-function forklift capable of steering control by arbitrarily switching various driving modes. This multi-function forklift is provided with a push button switch on the operation panel in front of the driver seat, the number of push button switches corresponding to a plurality of traveling modes such as an omnidirectional mode, a spin turn mode, a reverse phase mode and a normal mode. It is configured such that an arbitrary traveling mode can be selected by operating.

However, when operating a reach type forklift, generally, the handle is operated with the left hand and the accelerator lever is operated with the right hand. Therefore, in the above-mentioned configuration, the handle or the accelerator lever is always operated when the mode is changed. Have to be separated, which is not a safety measure.

In particular, when the traveling modes are frequently changed, the number of times the hand is released from the handle or the like is increased, and there is a problem that workability is deteriorated.

In order to solve such a problem, the applicant of the present invention discloses, in Japanese Utility Model Laid-Open No. 7-13654, the accelerator which is arranged near a driver's seat of a multifunctional forklift and is tiltably operated by a driver's hand. It has been proposed that a push button switch be attached to the upper part of the lever, the number of times the push button switch is operated is counted, and a plurality of running modes are sequentially switched depending on the number of times of operation.

[0006]

By the way, in the proposal of Japanese Utility Model Laid-Open No. 7-13654, the driving modes are fixedly stored in a predetermined order, and this order is skipped by the number of times the push button switch is operated. It is configured to repeat while.

However, there are various work environments in which the multi-functional forklift is used, and there are many cases where the actually required work order of the forklift and the predetermined order of the traveling modes do not always match.

In such a case, in order to skip an undesired traveling mode, it is necessary to operate the push button switch by the number of times, which makes the traveling mode switching operation troublesome and the cargo handling efficiency is still sufficient. It has not reached the point of raising to.

The present invention has been devised in view of the above problems, and the traveling modes can be switched quickly and sequentially in accordance with the work order of the forklift that is actually required, so that the traveling mode switching operation is facilitated. The purpose is to provide a multifunctional forklift that can improve the efficiency of cargo handling work.

[0010]

SUMMARY OF THE INVENTION The present invention is a multifunctional forklift capable of traveling in a plurality of selectable traveling modes, and traveling mode selection storage means for preliminarily selecting and storing traveling modes in accordance with a work order, and traveling. The present invention is characterized in that the vehicle further comprises travel mode extracting means for sequentially extracting the travel modes stored in the mode selection storage means as the work progresses.

In the case where the traveling mode take-out means includes an take-out switch which is provided on the accelerator lever and sequentially takes out the traveling modes stored in the traveling-mode selecting and storing means by an operation, without releasing the accelerator lever. It is desirable in that the running modes can be switched quickly and workability can be further enhanced.

Further, the traveling mode selection storage means can prevent an erroneous selection by providing a confirmation means for confirming the selection of the traveling mode. Further, the traveling mode extracting means further improves workability and operability by providing extraction confirming means for informing the driver of the extracted traveling mode.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, the multi-function forklift 1 has a plurality of selectable traveling modes md0, md1,
Of the md2 (generally referred to as a traveling mode mdi), steering and traveling can be performed according to the content of one traveling mode currently selected.

The multifunctional forklift 1 of the present invention
Is a travel mode selection storage means 2 for selecting and storing travel modes mdi in advance according to the work order, and a travel mode extraction means 3 for sequentially extracting the travel modes mdi stored in the travel mode selection storage means 2 as the work progresses. It is characterized by having and.

As shown in FIG. 1, the multifunctional forklift 1 is based on a reach type forklift, and is arranged near a driver's seat and is operated by an accelerator lever 4 which can be tiltably operated by a driver. As the means 3, in this example, there is provided a take-out switch 5 which is provided at the upper end of the accelerator lever 4 and is always urged upward by a spring or the like.

The multi-functional forklift 1 has a handle 2
Drive wheel 21 steered by 0, road wheels 25 and 26 that can be steered via left and right steering motors 22 and 23 and transmission 24, and rotation angles of mount brackets 27, 29 and 30 of these wheels, respectively. And potentiometers 31, 32, 33 that can be detected. Then, the road wheels 25 and 26 are appropriately steering-controlled according to the traveling mode.

In this multifunctional forklift 1, the steering angles of the left and right road wheels 25, 26 are fixed in the straight traveling direction,
Starting from a normal traveling mode in which the steering wheel is turned only by steering the drive wheel 21, a steering angle signal of the drive wheel 21 is used as a command value, and the left and right road wheels 25, 2
It is possible to travel by appropriately switching between a plurality of travel modes mdi such as the omnidirectional mode in which the steering control of 6 is possible and the spin turn mode shown in Japanese Patent Laid-Open No. 5-116643.

Although the specific contents of each traveling mode mdi will be omitted, in the present embodiment, for example, one having four traveling modes md0, md1, md2, md3 will be described as an example.

Next, the traveling mode selection storage means 2
The selection means 9 that can select the traveling mode mdi according to the order of the work, and the confirmation means for confirming the selection are:
For example, it is provided with LED lamps A0 to A3 which are turned on in correspondence with the selected traveling mode mdi, and a memory RAM which can store the order of the selected traveling mode mdi.

In the present example, the selecting means 9 has four driving mode selection switches Bi (i is 0) corresponding to the driving modes.
Is an integer of up to 3), and by pressing this travel mode selection switch Bi, the corresponding travel mode mdi is processed by, for example, the CPU so as to be stored in the memory RAM.

Further, the LED lamp Ai is configured so that a lamp corresponding to the selected traveling mode is turned on. Therefore, it helps prevent erroneous selection. Note that L
It is also preferable to notify the driver by voice of the selected driving mode in conjunction with or instead of lighting the ED lamp Ai.

In the traveling mode selection storage means 2,
The selection of the traveling mode mdi and the start and end of the storage are performed by pressing the storage start / stop storage sequentially
This can be done by operating the push button switch 37 as the ending means 10. When the storage and selection are completed,
The contents are stored and held in the memory RAM.

FIG. 4 exemplifies the processing procedure of the driving mode selection storage means 2. First, when selection and storage are started by operating the push button switch 37, the running mode mdi
The total number M of steps indicating the number of selections and the step variable N specifying the order of the driving modes mdi are both set to 0. As a result, the contents already stored in the memory RAM can be erased.

Next, by operating the push button switch 37, it is determined whether or not selection and storage have been completed, and if not, it is determined whether or not the traveling mode selection switch Bi has been turned on. Now, assuming that the driver first turns on the traveling mode selection switch B2 so as to match the work order, 1 may be added to the step variable N to execute the selected traveling mode md2 first. Yo Memory RA
Store it in M. In this case, as mentioned above,
The LED lamp A2 is turned on, and it can be confirmed that the traveling mode md2 is selected.

When the push button switch 37 is operated to instruct the end of storage while sequentially repeating the above processing,
The total number M of steps, which indicates the number of selections of the traveling mode mdi, is set to the step variable N at that time, stored and held, and the processing ends.

FIG. 3 conceptually shows the contents of the memory RAM. The running modes md2, md0, md2, m are shown in FIG.
In accordance with the work (execution) order desired by the driver, such as d1 ... md0, M pieces up to step M are sequentially selected and stored, and this change can be freely performed. it can.

The traveling modes mdi stored by the traveling mode selection storage means 2 are sequentially retrieved from the memory RAM and switched by the driver operating the traveling mode extracting means 3 as the work progresses. be able to.

FIG. 5 shows a flowchart of the processing procedure (of the CPU) related to the traveling mode take-out means 3. First, referring to the memory RAM, it is determined whether or not the stored total number M of steps is 0, that is, whether or not one or more traveling modes are stored. If the traveling mode is stored, the step variable N of the traveling mode is set to 0.

Next, it is judged whether or not the take-out switch of the traveling mode take-out means 3 is turned on, and if it is turned on, the step variable N is used to move down the order (execution) by one.
Is incremented by 1 (N = 1 at this time), and the traveling mode of the multifunction forklift is determined to be the step "N" stored in the memory RAM of FIG.
It is set to d2.

At this time, the take-out confirmation means turns on the LED lamp A2 corresponding to the traveling mode md2, and the LED of the next traveling mode, md0 in this example.
If the lamp A0 is configured to blink, the driver can confirm the next traveling mode and the workability is greatly improved, and the LED lamp Ai can also function as the takeout confirmation means. The current driving mode md
It is also preferable to inform the driver of 2 by voice or the like.

When the value of the step variable N matches the total number M of steps by repeating the above procedure, the step variable N
Is reset to 0, and in response to the driving mode takeout request, the process returns to step 1 of the predetermined work sequence,
The execution order is repeated.

Therefore, in this embodiment, the required traveling modes mdi can be sequentially taken out and switched while operating the accelerator lever 4, and the traveling can be performed in accordance with the actually required work order of the forklift. Since the driver can freely select and store the order of the modes, the switching operation of the traveling mode mdi is reduced to the minimum necessary,
Workability can be greatly improved.

Although detailed description has been given above, the present invention is not limited to the above-described embodiment, and the arrangement position of the take-out push button 5, the number of traveling modes, the number of work (execution) steps, and the operation of replacing the take-out switch 5 LED for panel installation and confirmation
Various modifications can be made within the scope not departing from the gist of the present invention, such as using a display tool or a lighting tool other than the lamp.

[0034]

As described above, the multi-functional forklift according to the present invention includes the traveling mode selection storing means for selecting the traveling modes in advance according to the work order and storing them, and the traveling mode stored in the traveling mode selection storing means. Since the vehicle is equipped with a traveling mode take-out means for sequentially taking out the traveling mode, the driver can freely select and store the order of the traveling modes according to the work order of the forklift that is actually required. Reduce the number of mode switching operations to the minimum necessary,
The efficiency of cargo handling work can be greatly improved.

Further, in the invention of claim 2, when the traveling mode take-out means includes an take-out switch which is provided on the accelerator lever and sequentially takes out the traveling modes stored in the traveling mode selection storage means by an operation, a hand from the accelerator lever is used. The driving mode can be quickly switched and taken out without releasing the wheel, and safety can be improved and workability can be further improved.

Further, according to the invention of claim 3, since it is possible to select the traveling mode and confirm the traveling mode during execution, erroneous selection or erroneous operation can be prevented to increase the certainty of the processing. The operability of the functional forklift can be further improved.

[Brief description of drawings]

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

FIG. 2 is a partial side view illustrating an accelerator lever.

FIG. 3 is a block diagram of a memory RAM exemplifying a storage order of travel modes in a travel mode selection storage unit.

FIG. 4 is a flowchart showing a processing procedure of traveling mode selection storage.

FIG. 5 is a flowchart showing a processing procedure for taking out a traveling mode.

[Explanation of symbols]

 2 traveling mode selection storing means 3 traveling mode taking out means 4 accelerator lever 5 taking out switch 9 selecting means A0, A1, A2, A3 LED lamp

Claims (3)

[Claims] 1. A multi-function forklift capable of traveling in a plurality of selectable traveling modes, the traveling mode selection storing means for selecting and storing traveling modes in advance according to a work order, and the traveling mode selection storing means. A multi-function forklift comprising travel mode extracting means for sequentially extracting travel modes as the work progresses. 2. The multi-function according to claim 1, wherein the traveling mode take-out means includes an take-out switch which is provided on an accelerator lever and sequentially takes out the traveling modes stored in the traveling-mode selection storage means by an operation. forklift. 3. The traveling mode selection storage means comprises a confirmation means for confirming the selection of the traveling mode, and the traveling mode take-out means comprises a take-out confirmation means for giving notice of taking out the traveling mode. Claim 1
Alternatively, the multi-functional forklift according to 2.