JP2002293498A - Control device for cargo handling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the safety of an assisting worker during cargo handling work. SOLUTION: When a delivery pallet 30 is aligned to a cargo 29 placed on a yard special pallet 28 with the cooperation of both a driver D and the assisting worker S not getting on a driver's seat, if a transmitting means 35 carried by the assisting worker S is turned on, an infrared radio signal is transmitted toward a receiving means 36 and received by the receiving mean 36. During a period for turning on a switch of the transmitting means 35, various operation levers for operating attachments 27 are controlled to be in operative conditions by control means and a hydraulic motor for driving the attachments 27 with the operation of the operation levers is controlled to make a clamping cylinder extend and put the attachments 27 in clamping motion as specified motion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cargo handling vehicle in which an attachment is attached to a front portion of a vehicle body for a cargo handling operation, and a driver on the vehicle body and an auxiliary worker who does not ride cooperate to carry out the cargo handling operation with the attachment. Related to a control device.

[0002]

2. Description of the Related Art Conventionally, in a forklift, which is a cargo handling vehicle, when a cargo handling operation is performed by an attachment attached to a front portion of the vehicle body for the cargo handling operation, a driver who rides on the vehicle body and an auxiliary worker who does not ride collaborate. It may be done.

For example, taking a forklift with an inverter clamp attachment as an example, it is configured as shown in FIG. In FIG. 4, reference numeral 1 denotes a vehicle body that travels by driving of a traveling motor, reference numeral 2 denotes a mast erected on a front portion of the vehicle body 1, and reference numerals 3 and 4 are rotatably provided on a mast 2 via a rotating portion R and capable of moving up and down. The lower lift bracket and the upper lift bracket 5 are a pair of left and right L-shaped lower forks attached to the lower lift bracket 3, and 6 is a pair of left and right L-shaped upper forks attached to the upper lift bracket 4. is there. Here, the inverter clamp attachment 7 is constituted by both lift brackets 3 and 4 and both forks 5 and 6.

[0004] A hydraulic motor (not shown) built in the vehicle body 1 is operated in response to an operation of an operation lever (not shown) provided in the driver's seat by an operation of a driver in the driver's seat of the vehicle body 1. The clamp cylinder (not shown) is driven by a battery to expand and contract, and the lower and upper lift brackets 3 and 4
Move up or down simultaneously or separately, and the upper forks 5, 6 move up and down. That is, the lifting and lowering of the lower and upper forks 5, 6 is a clamping operation.

At this time, an auxiliary worker other than the driver who does not sit in the driver's seat is added, and the auxiliary worker positions the shipping pallet 10 on the load 9 placed on the pallet 8 exclusively for the premises. After the shipping pallet 10 is normally placed, the luggage 9 is turned upside down so that the shipping pallet 10 is turned down and the premises exclusive pallet 8 is placed above. Then, the premises exclusive pallet 8 is removed, and the shipping pallet 10 is removed. The luggage 9 placed on this is shipped.

[0006]

By the way, when the shipping pallet 10 is placed on the baggage 9, the auxiliary worker manually aligns the shipping pallet 10.
The driver performs the clamping operation of the forks 5 and 6 after the signal of the auxiliary worker after the completion of the alignment. However, the signal from the auxiliary worker is not transmitted to the driver due to ambient noise, Although the position of the auxiliary worker has not been completed due to caution or the like, the clamp operation of the forks 5 and 6 is performed by the driver, and the finger of the auxiliary worker is brought into contact with the shipping pallet 10 and the load 9. There is a problem that an accident such as being caught in between occurs.

[0007] Such a problem can also occur in other forklifts with attachments in which the driver and the auxiliary worker cooperate in carrying out cargo handling operations.

Accordingly, an object of the present invention is to ensure the safety of an auxiliary worker during cargo handling.

[0009]

In order to achieve the above object, the present invention relates to a cargo handling vehicle in which an attachment is attached to a front portion of a vehicle body for cargo handling operation, wherein a driver and a passenger riding the vehicle body are provided. In a control device of a loading and unloading vehicle in which an auxiliary worker cooperates to perform a cargo handling operation with the attachment, a transmitting unit that is carried by the auxiliary worker and transmits a radio signal by an operation, and a transmitting unit provided on the vehicle body, Receiving means for receiving the wireless signal, and control means for controlling the operation of the attachment by receiving the wireless signal by the receiving means.

[0010] According to such a configuration, the transmission means carried by the auxiliary operator is operated and a radio signal is transmitted from the transmission means. When the radio signal is received by the reception means, the control means controls the attachment. Since the operation is controlled, the auxiliary worker can operate the attachment, for example, by operating the transmission means, or stop the operation, thereby ensuring the safety of the auxiliary worker during the cargo handling operation. it can.

In the present invention, the control means controls the attachment to perform a specific operation or stops the operation of the attachment while the transmission means is operated. At this time, the control means operates at least one of the
The attachment may be controlled to perform the specific operation described above, or the attachment may be controlled to perform the specific operation for a predetermined time set in advance by operating the transmission unit.

With this configuration, the operation of the attachment can be enabled or stopped only while the transmission means is being operated, or one or a plurality of specific operations by the attachment can be performed by operating the transmission means. By operating the transmission means, a specific operation by the attachment can be performed for a predetermined time set in advance, and by operating the transmission means, the safety of the auxiliary worker during the cargo handling operation can be ensured.

The present invention further comprises a notifying means controlled by the control means, wherein the control means controls the attachment to perform the specific operation based on the reception of the radio signal by the receiving means. Preferably, the notifying means is controlled to operate.

According to such a configuration, the driver can know from the notification of the notification means that the attachment is being controlled to perform the specific operation, so that the safety of the auxiliary worker during the cargo handling operation is more reliably ensured. It can be carried out.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the present invention is applied to a forklift with an inverter clamp attachment will be described with reference to FIGS. 1 is a diagram showing a schematic configuration, FIG. 2 is a block diagram, and FIG. 3 is a partial plan view.

As shown in FIG. 1, a mast 22 is erected at a front portion of a vehicle body 21 driven by a traveling motor, and a lower lift bracket 23 and an upper lift bracket 24 are connected to the mast 22 via a rotating portion R. A pair of left and right L-shaped lower forks 25 is mounted on the lower lift bracket 23, and a pair of left and right L-shaped upper forks 26 are mounted on the upper lift bracket 24. Both lift brackets 23,
The inverter clamp attachment 27 is configured by the fork 25 and both forks 25 and 26.

When a driver D in the driver's seat of the vehicle body 21 operates an operation lever (not shown) provided in the driver's seat, a hydraulic motor built in the vehicle body 21 is operated in accordance with the operation of the operation lever. (Not shown) is driven by a battery to expand and contract a clamp cylinder (not shown), and the lower and upper lift brackets 23 and 24 move up or down simultaneously or separately, and the lower and upper forks 25 and 26 move up and down.

Further, as shown in FIG. 1, the cooperation of both the driver D and the auxiliary worker S who does not sit in the driver's seat causes the shipping pallet 30 to be placed on the luggage 29 placed on the private pallet 28. At this time, the auxiliary worker S carries the transmission means 35 of, for example, an infrared type, and when the switch of the transmission means 35 is turned on, a radio signal by infrared rays is transmitted to the vehicle body 21. It is emitted toward a receiving means 36 attached to the front part, and the receiving means 36 receives an infrared radio signal.

By the way, while the switch of the transmitting means 35 is turned on, as shown in FIG. 2, since the radio signal is continuously transmitted from the transmitting means 35 to the receiving means 36,
A reception signal based on the reception of the wireless signal from the reception means 36 is continuously output to the control means 37 comprising a microcomputer, and only while the transmission means 35 is on, the control means 37 controls the various operation levers 37 for operating the attachment 27. The clamp cylinder is controlled to be operable and the hydraulic motor 39 that drives the attachment 27 in response to the operation of the operation lever 38 is extended and contracted, so that the clamp operation of the attachment 27, which is a specific operation in the present invention, is performed. It has become.

Also, while the receiving means 36 receives the radio signal due to the turning on of the transmitting means 35, the notifying means 40 including a buzzer, a chime, a lamp and the like is controlled by the control means 37, and the clamp operation by the attachment 27 is being executed. Is notified to the driver D and the auxiliary worker S.

Here, the transmitting means 35 has a key holder shape as shown in FIG. 3, and can transmit by switching the power switch 35S to the ON side. In this state, the push button switch SW is pressed (turned on). Thus, for example, an infrared wireless signal is transmitted from the light emitting unit L in which the infrared light emitting diode is embedded. The transmission of the wireless signal is stopped by stopping (turning off) the pressing of the push button switch SW. Further, it is preferable that the receiving means 36 is attached at a position where the wireless signal from the transmitting means 35 is not blocked by the mast 22 or the like.

Therefore, the auxiliary worker S keeps pushing (turning on) the pushbutton switch SW of the transmitting means 35 until the shipping pallet 30 can be properly positioned on the upper surface of the load 29, and the auxiliary pallet S is kept on during the on-time. Only the attachment 27 can be operated, and if the auxiliary worker S wants to stop the operation of the attachment 27, the transmission means 35
Is stopped (turned off), the operation of the attachment 27 is immediately stopped.

In this way, when the auxiliary worker S turns on the transmission means 35 and completes the alignment of the shipping pallet 30 with the load 29, the attachment 27 is turned upside down and the shipping pallet 30 is lowered. The luggage 29 is turned upside down so that the on-premise pallet 28 is on top, and then the on-premise pallet 28 is removed.
At the same time, the luggage 29 placed thereon is shipped.

Therefore, according to the above-described embodiment, when the auxiliary worker S keeps pressing the push button switch SW of the transmitting means 35, the attachment 27 can be clamped. When a finger is likely to be pinched during the alignment of the pallet 30, the pressing operation of the push button switch SW of the transmitting unit 35 is stopped, so that the clamping operation of the attachment 27 can be immediately stopped immediately. It is possible to ensure the safety of the auxiliary worker S during the cargo handling operation.

Further, the driver D easily recognizes that the attachment 27 is controlled to perform the clamping operation based on the operation of the transmission unit 35 by the auxiliary worker S by the notification of the notification unit 40. Therefore, it is possible to more reliably ensure the safety of the auxiliary worker S during the cargo handling operation.

In the above embodiment, the transmitting means 3
The case has been described in which the clamp operation of the attachment 27 is enabled only while the push button switch SW of No. 5 is kept pressed (turned on).
While the push button switch SW of the transmission means 35 is not pressed (turned off), the clamp operation of the attachment 27 is enabled, and the push button switch SW of the transmission means 35 is enabled.
By pressing (turning on), the clamp operation of the attachment 27 may be stopped in an emergency.

The push button switch S of the transmitting means 35
By pressing (turning on) W, the clamping operation of the attachment 27 may be enabled, and by pressing the button switch SW again, the clamping operation of the attachment 27 may be disabled.

Further, by operating the transmission means 35 (on or off), the attachment 27 may be controlled to perform a specific operation (for example, a clamp operation) for a predetermined time preset by the control means 37, or at least. Needless to say, the attachment 27 may be controlled to perform one specific operation.

More specifically, when the operation of the attachment 27 is classified into, for example, clamping, reversing, and releasing the clamping operation, each of these operations corresponds to one specific operation. The operation (on or off) of the transmission means 35 sets a time sufficient to perform each of the above-mentioned operations (1) to (6), and the control means 37 sets the attachment so as to perform each of these operations for this time. The attachment 27 may be controlled by the control unit 37 by controlling the attachment unit 27 or by operating the transmission unit 35 (on or off).

In the above embodiment, the transmitting means 3
Although the description has been given of the case where the wireless communication system 5 is a wireless system using infrared rays, it is needless to say that an ultrasonic system or a radio wave system may be used.

Further, in the above-described embodiment, the case where the present invention is applied to a forklift with an inverter clamp attachment has been described. However, the present invention is not limited to this. It goes without saying that a forklift with an attachment, such as a clamp or a side clamp, or a cargo-handling vehicle other than a forklift may be used. In short, a cargo-handling vehicle used for cargo-handling work that requires an auxiliary worker other than the driver. I just need.

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

[0033]

As described above, according to the first aspect of the present invention, the transmitting means is operated by the auxiliary worker to transmit a radio signal from the transmitting means, and the radio signal is transmitted by the receiving means. When the attachment is received, the operation of the attachment is controlled by the control means, so that the auxiliary worker operates the transmission means, for example, to enable the operation of the attachment or to stop the operation. It is possible to ensure the safety of the auxiliary worker.

At this time, by performing the control as described in claims 2 to 4, it is possible to secure the safety of the auxiliary worker during the cargo handling work by operating the transmission means.

According to the fifth aspect of the present invention, the notification by the notification means allows the driver and the auxiliary worker to know that the attachment is being controlled to perform a specific operation. It is possible to ensure the safety of the worker more reliably.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a block diagram according to an embodiment of the present invention.

FIG. 3 is a partial plan view of one embodiment of the present invention.

FIG. 4 is a diagram showing a schematic configuration of a conventional example.

[Explanation of symbols]

 Reference Signs List 21 vehicle body 22 mast 27 attachment 35 transmission means 36 reception means 37 control means 40 notification means D driver S auxiliary worker

Claims (5)

[Claims] 1. A cargo handling vehicle in which an attachment is attached to a front portion of a vehicle body for a cargo handling operation, wherein a driver on the vehicle body and an auxiliary worker who does not board the vehicle cooperate to perform a cargo handling operation with the attachment. In the control device for a vehicle, a transmitting unit that is carried by the auxiliary worker and transmits a wireless signal by operation, a receiving unit provided on the vehicle body to receive a wireless signal from the transmitting unit, and the wireless signal by the receiving unit Control means for controlling the operation of the attachment upon receipt of the control signal. 2. The control device according to claim 1, wherein the control unit controls the attachment to perform a specific operation or stops the operation of the attachment while the transmission unit is operated. Control device for cargo handling vehicle. 3. The control device according to claim 1, wherein the control unit controls the attachment to perform at least one specific operation by operating the transmission unit. 4. The control device for a cargo handling vehicle according to claim 1, wherein the control means controls the attachment so as to perform a specific operation for a predetermined time set in advance by operating the transmission means. . 5. A notifying unit controlled by the control unit, wherein the control unit notifies the notification when the attachment is controlled to perform the specific operation based on the reception of the wireless signal by the receiving unit. The control device for a cargo handling vehicle according to any one of claims 2 to 4, wherein the control means operates the means.