JP2003246598A - Display device for cargo handling vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of easily watching a vehicle information regarding traveling and a cargo handling work and an information regarding a cargo handling by one display means by reducing an installment space of a terminal unit of wireless LAN. <P>SOLUTION: A communication control means 70 of the terminal unit and a vehicle control means 71 are switched and connected to the display means 68 by a switching means and the switching means 73 is switch-operated by an operation means 75. Thereby, one display means 68 is co-used for the display of the information regarding the cargo handling or the information regarding the vehicle. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a cargo handling vehicle, which is provided with display means which is controlled by vehicle control means and which displays various information about the vehicle.

[0002]

2. Description of the Related Art Conventionally, some battery forklifts, which are cargo-handling vehicles, are provided with a display means composed of a liquid crystal display (LCD) in the driver's seat to display various necessary information to an operator. For example, information about the vehicle such as the traveling speed and the remaining capacity of the drive battery is mainly displayed. Then, the operator can grasp the current state of the vehicle from the display of the display unit, and can visually acquire and recognize information such as that the traveling speed is too high or the battery needs to be charged.

On the other hand, in recent years, for a forklift, a management side communication means (hereinafter referred to as a management machine) composed of a personal computer or the like and a terminal side communication means (hereinafter referred to as a terminal machine) mounted on a forklift are used. A so-called wireless LAN is constructed as a communication device, information about cargo handling is transmitted from a management machine to a terminal, and cargo handling work is executed according to the information received by the terminal. Here, the information on cargo handling is information on the location of unloading and unloading, and information on loading and unloading such as the type and number of packages.The operator displays this information on the display screen provided in the terminal. By looking at the screen, you can confirm the location of unloading and unloading.

However, in the conventional forklift, the display means for displaying the above-mentioned vehicle information relating to traveling and cargo handling work is embedded in the driver's seat of the vehicle body, whereas the terminal device is similar to this embedded display means. Despite being equipped with a display part of, most are externally attached,
Two means having a display function will be mounted on one forklift.

Specifically, in the case of a counterbalance type forklift, as shown in, for example, FIGS. 3 and 4, a head guard 1 for protecting an operator is supported on a vehicle body 3 by four columns 2 and a driver's seat 4 is provided. A communication unit 6 with a built-in battery in a wireless LAN is attached to the head guard 1 of the head guard 1, and a display operation unit 7 including a touch panel mounted liquid crystal display (LCD) that constitutes a terminal together with the communication unit 6 is provided. Is attached to, for example, the upper part of the right front support column 2 that supports the head guard 1. Although not shown in FIGS. 3 and 4, information regarding cargo handling is wirelessly communicated with a management machine configured by a personal computer installed in a management office.

In FIGS. 3 and 4, reference numeral 10 is a vehicle body 3.
The driver's seat 4 is provided with a battery for supplying power to the traveling motor and the hydraulic motor in the vehicle body 3 below the driver's seat 4. Reference numeral 11 denotes a steering wheel, which controls steering of rear wheels 13 which are steered wheels, and a braking force is applied to front wheels 12 which are drive wheels by depressing a brake pedal. An LCD that displays information about the vehicle such as traveling speed and remaining battery level near the steering wheel 11.
The display means consisting of is embedded.

Further, 15 is a mast which is attached to the front portion of the vehicle body 3 so as to be able to extend and contract, and 16 is a pair of L-shaped forks which are attached to the mast 15 via lift brackets 17, which are provided in the driver's seat 4. The hydraulic motor is driven based on the control command value corresponding to the operation of the lift lever thus operated, the lift cylinder operates, and the mast 15 expands and contracts.
The fork 16 moves up and down by the expansion and contraction of 5.

Further, in the case of a reach type forklift, as shown in FIG. 5, a head guard 20 for protecting the operator from falling objects is provided with a pair of left and right columns 2 on the front part of a vehicle body 21.
The head guard 20 is mounted on the upper part of the driver's seat, which is supported by the operator 2. A display operation unit 25 including a touch panel-mounted liquid crystal display (LCD) that constitutes a terminal together with 24
The information regarding cargo handling is wirelessly communicated with the management machine installed in the management office.

In FIG. 5, reference numeral 28 is a straddle arm fixed to the front left and right ends of the front portion of the vehicle body 21, and 29 is a left and right driven wheel rotatably attached to each straddle arm 28. 30 is a mast which is erected between the straddle arms 28 so as to be movable back and forth,
Reference numeral 31 is a pair of L-shaped forks attached to the mast 30 via lift brackets 32 and moved up and down by a lift cylinder. By operating various hydraulic operation levers 34 provided in the driver's seat, both forks 31 are moved up and down. , Tilting, etc. are controlled.

Further, reference numeral 36 is a steering wheel provided in the driver's seat, and the steering wheel 36 is turned by controlling the direction of the drive wheels 37 provided at the rear portion of the vehicle body 21 in response to the operation of the steering wheel 36, that is, the so-called steering angle. It is possible to drive. In the vicinity of the steering wheel 36 of the driver's seat, a display unit including an LCD for displaying information about the vehicle such as the traveling speed and the remaining battery level is embedded.

[0011]

However, in the conventional forklifts such as the counterbalance type and reach type forklifts, as described above, in addition to the display means for displaying the vehicle information relating to the traveling and the cargo handling work, the display is provided. Since the display operation units 7 and 25 of the wireless LAN having the function are provided and two means having the display function are mounted on one forklift, the visibility of the front is deteriorated by the display operation units 7 and 25, There is a problem such as getting in the way when boarding. Especially in the case of the counter balance type, since the display operation unit 7 is attached to the right front support column 2 that supports the head guard 1, the operator can operate the driver's seat 4 I could hardly board from the right side.

In the case of the reach type, the display means for displaying information about the vehicle is hidden from the operator, for example, inside the vehicle body, and the display operation unit 25 of the terminal is embedded at the position where the display means should be embedded. However, it has been considered to prevent the user from getting in the way when boarding, but there has been a problem that the operator cannot easily confirm information about the vehicle such as the traveling speed and the remaining battery level.

In view of the above, the present invention reduces the installation space of a wireless LAN terminal, and makes it possible to easily view vehicle information relating to traveling and cargo handling work, and information relating to cargo handling by one display means. The purpose is to provide.

[0014]

In order to achieve the above-mentioned object, the present invention provides a display device for a cargo handling vehicle, comprising display means for displaying various information regarding the vehicle under the control of the vehicle control means, Terminal side communication means mounted on the vehicle body for wirelessly communicating information regarding cargo handling with the management side communication means, and switching means for selectively switching and connecting the vehicle control means and the terminal side communication means to the display means. And an operating means for switching the switching means, and the display means is also used for displaying information regarding a vehicle and information regarding cargo handling (claim 1).

According to this structure, the switching means is switched by the operating means, and the vehicle control means and the terminal-side communication means are selectively switched and connected to the display means, so that information of two different properties is displayed. In addition, since one display means can be used in common, it is possible to eliminate the problems such as deterioration of the operator's forward field of view during work and obstruction during boarding as in the conventional case.

In the present invention, the terminal side communication means is
It is characterized in that the display means is controlled so as to display the information on the cargo handling exchanged with the management side communication means on the display means (claim 2). With such a configuration, the display unit that displays information about the vehicle such as the traveling speed and the remaining battery level can also be used by the switching unit to display information about cargo handling such as entry / exit data.

Further, the present invention is characterized in that the display means is arranged so as to be embedded near the driver's seat of the vehicle body (claim 3). According to such a configuration,
Since it is embedded in the driver's seat, it is possible to reduce the installation space of the display means and prevent the display means from interfering with the boarding of the operator.

Further, the present invention is characterized in that the cargo handling vehicle is a forklift (Claim 4). According to such a configuration, it is possible to provide a forklift truck that can easily view vehicle information regarding traveling and cargo handling work, and information regarding cargo handling with one display unit.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to a reach type forklift will be described with reference to FIGS. 1 and 2. However, FIG. 1 is a side view of the reach type forklift, and FIG. 2 is a block diagram.

The reach type forklift according to the present embodiment is constructed as shown in FIG. That is, straddle arms 53 are projectingly fixed forward at the left and right ends of the front portion of the vehicle body 52 of the reach type forklift 51, and a fork 54 that is lifted and lowered by a lift cylinder (not shown) is provided between these straddle arms 53. A mast 55 for guiding is erected so as to be movable back and forth.

Left and right driven wheels 56 are rotatably attached to the straddle arms 53, respectively.
One drive wheel 57 is attached to the lower rear part of the vehicle 2, and two caster wheels 58 that support the vehicle body 52 and follow the traveling of the vehicle body 52 are attached.

Further, as shown in FIG. 1, a reach lever for moving the fork 54 back and forth and a fork 54 are moved up and down in a driver's seat portion which is a standing space for an operator provided in the vehicle body 52. Various hydraulic operation levers 59 such as a lift lever for adjusting the tilt of the fork 54 and a tilt lever for adjusting the inclination of the fork 54, and an accelerator lever 6 for rotating the drive wheels 57.
0 is provided, and the tilting operation of the accelerator lever 60 determines the traveling direction and traveling speed of the vehicle body 52 in the forward or reverse direction. In addition, the steering handle 6 for steering
1 is provided, and the steering handle 61 is provided during traveling.
By controlling the direction of the drive wheels 57, that is, the so-called steering angle in accordance with the operation of, the turning traveling is possible.

By the way, although not shown in FIG. 1, a brake pedal operated by a driver is provided in the vehicle body 52, and while the brake pedal is being depressed, the drive motor of the drive wheels 57 is driven. A deadman brake including a disc brake that locks the rotary shaft and brakes the drive wheels 57 is provided. When the brake pedal is depressed, the travel motor is unlocked, the deadman brake is released, and when the brake pedal is stopped. When the dead man brake locks the rotation shaft of the traveling motor to apply a braking force to the drive wheels 57 and an abnormal situation occurs, the driver removes his / her foot from the brake pedal to activate the dead man brake to operate the vehicle. It can be stopped.

Inside the vehicle body 52 below the steering handle 61, an accommodating portion is formed by being partitioned by an openable / closable partition cover, and a battery is accommodated in this accommodating portion. From this battery, each part of the forklift 51 and each of these parts. The power is supplied to the vehicle control means including a microcomputer that controls the above-mentioned control, and the wireless LAN terminal described later.

Further, as shown in FIG. 1, a mast 55 is telescopically attached to the front portion of the vehicle body 52.
A pair of L-shaped forks 54 are attached to the No. 5 via a lift bracket 63. Then, the hydraulic motor is driven based on the control command value according to the operation of the lift lever provided in the driver's seat, the lift cylinder operates, the mast 55 expands and contracts, and the fork 54 moves up and down by the expansion and contraction of the mast 55.

In FIG. 1, reference numeral 65 is a head guard that protects the operator from falling objects and the like, which is supported by a pair of left and right columns 66 at the front of the vehicle body 52 and is disposed above the driver's seat. This is the head guard 6
An antenna of the communication means on the terminal side is attached to 5.

By the way, as shown in FIG. 1, a liquid crystal display (LC
The display means 68 consisting of D) is provided, and the display means 68 is controlled by the vehicle control means described above to display information about the vehicle such as the traveling speed and the remaining battery level. A touch panel is attached to the display unit 68, and an operation unit for inputting various information and data is configured.

Although not shown in FIG. 1, the wireless L
Terminal side communication means in the AN (hereinafter referred to as terminal)
The communication control means composed of a microcomputer constituting the above is housed inside the vehicle body 52, installed in a management office, and is composed of a personal computer which constitutes a wireless LAN together with a terminal (management side communication means hereinafter). Information regarding cargo handling is wirelessly communicated with the.
At this time, the information on cargo handling refers to information on the location of unloading and unloading, and information on warehousing such as the type and number of packages.

The power supply to the terminal is supplied by a battery housed in the vehicle body 52 and is turned on / off in conjunction with the on / off operation of the key switch of the forklift 51.

As shown in FIG. 2, the communication control means 70 and the vehicle control means 71 of the terminal are switched and connected to the display means 68 by the switching means 73, and the switching means 73 is switched by the operating means 75. One display means 68 is also used for displaying information of two different properties. In this way, the terminal is composed of the display unit 68 and the communication control unit 70 which are also used. The switching means 7
3 can be composed of a plurality of semiconductor switches in addition to the mechanical changeover switch, and the operating means 75 is for switching this when the changeover means 73 is a mechanical changeover switch. In the case of (3), the switching signal is applied to the semiconductor switch.

Under such a structure, the operator operates the operating means 75 to switch the switching means 73 as necessary, and displays either the communication control means 70 or the vehicle control means 71 on the display means 68. By selectively switching and connecting, it is possible to selectively display, on the display unit 68, either information relating to cargo handling or information relating to vehicles.

Therefore, according to the above-mentioned embodiment, one display means 68 can be used for displaying information of two different properties, that is, the information about the vehicle and the information about the cargo handling. , The information on cargo handling can be switched and displayed, the installation space of the wireless LAN terminal can be reduced, and the operator's forward visibility during work and the obstacles when boarding can be reduced as in the past. Can be eliminated.

In the above embodiment, the power source of the terminal unit (terminal side communication means) is supplied by the drive battery of the forklift 51, and the power source ON / OFF control is performed in conjunction with the key switch. However, it is needless to say that the terminal may be provided with a power switch for performing on / off control of the power supply independently of the key switch, and the power may be independently provided in the terminal.

Further, the disposition position of the display means 68 is not limited to the position of the above-mentioned embodiment, and in short, it is a position that does not interfere with the driving operation of the operator and can be visually recognized anywhere. I do not care.

Further, in the above-described embodiment, the case where the present invention is applied to the reach type forklift has been described, but other types of forklifts including counterbalance type forklifts other than the reach type forklift, and other cargo handling vehicles. Needless to say, the present invention can also be applied, and in this case as well, the same effects as those of the above-described embodiment can be obtained.

The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the invention.

[0037]

As described above, according to the first aspect of the present invention, the switching means is switched by the operating means, and the vehicle control means and the terminal side communication means are selectively switched and connected to the display means. Therefore, one display means can be used also for displaying information of two different properties, and it is possible to eliminate the problems such as deterioration of the operator's forward field of view during work and obstruction during boarding as in the conventional case. become.

According to the second aspect of the present invention, the display means for displaying information on the vehicle such as the traveling speed and the remaining battery level is also used by the switching means for displaying information on cargo handling such as warehousing / outgoing data. It becomes possible to do.

According to the third aspect of the invention, since it is embedded in the driver's seat, the space for disposing the display means can be reduced and the display means can be prevented from interfering with the boarding of the operator. . It will be possible.

Further, according to the invention described in claim 4, it is possible to provide a forklift truck in which vehicle information relating to traveling or cargo handling work and information relating to cargo handling can be easily viewed by one display means. Become.

[Brief description of drawings]

FIG. 1 is a side view of a reach type forklift according to an embodiment of the present invention.

FIG. 2 is a block diagram of a control system in an embodiment of the present invention.

FIG. 3 is a side view of a conventional example.

FIG. 4 is a rear view of a conventional example.

FIG. 5 is a side view of another conventional example.

[Explanation of symbols]

51 Reach type forklift (cargo handling vehicle) 52 car body 68 display means 70 Communication control means 71 Vehicle control means 73 switching means 75 Operation means

Claims (4)

[Claims] 1. A display device for a cargo handling vehicle, comprising display means for displaying various kinds of information about the vehicle under the control of the vehicle control means, wherein information relating to cargo handling is wirelessly communicated with a management side communication means mounted on a vehicle body. Terminal-side communication means for communicating by means of, a switching means for selectively switching-connecting the vehicle control means and the terminal-side communication means to the display means, and operating means for switching the switching means,
A display device for a cargo handling vehicle, wherein the display means is also used for displaying information about the vehicle and displaying information about the cargo handling. 2. The terminal-side communication means controls the display means to display on the display means information regarding cargo handling exchanged with the management-side communication means. Display device for cargo handling vehicles. 3. The display device for a cargo handling vehicle according to claim 1, wherein the display means is arranged so as to be embedded near the driver's seat of the vehicle body. 4. The display device for a cargo handling vehicle according to claim 1, wherein the cargo handling vehicle is a forklift.