JPH065348Y2 - External overhang alarm device for forklift accessory - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a forklift equipped with an auxiliary device of a type that extends beyond the width or length of a machine base and is operated outside the machine. The present invention relates to an alarm device for informing the surroundings that the vehicle is extended to the outside of the machine and operated.

(Prior Art) Generally, in a forklift truck, when handling a large luggage that exceeds the vehicle width and is tall, the front view from the driver's seat is extremely deteriorated. For example, in a parent-child forklift that has a child lift called a remote control pallet truck detachably attached to the lifting member of the forklift, when loading luggage in a container,
It is difficult to confirm the vertical and horizontal clearance between the cargo and the container near the frontage of the container from the driver's seat.

In order to solve such a problem, a parent-child forklift equipped with a front confirmation device as an auxiliary device has been proposed. In this front confirmation device, a pair of left and right support arms, each equipped with a TV camera at the tip, is installed in the front of the lift bracket or the driver's seat so that it can extend and contract in the vehicle width direction, while a TV monitor is installed on the driver's side. The TV camera is always shrunk so that it fits within the width of the machine base, and when it is necessary to check the front, the TV camera is extended to the outside of the machine base, so that the situation in front of the TV monitor
In other words, the positional relationship of the luggage with respect to the frontage of the container is displayed so that the driver can confirm the front and safely carry out the loading work of the luggage.

(Problems to be solved by the invention) Since the above-mentioned TV camera is arranged at a height so as to catch the vicinity of the floor plate of the container, its position normally corresponds to the vicinity of the chest of the human body. . by the way,
When loading luggage into the container, the truck driver usually guides the loading of the luggage. Therefore, the support arm was extended to use the TV camera near the frontage of the container as described above. At this time, the truck driver may not be aware of this and may be hit by the support arm near the chest.

Therefore, the present invention relates to a forklift having an accessory that extends beyond the vehicle width, such as the above-mentioned front confirmation device, and operates to extend to the outside of the machine when the accessory is extended to the outside of the machine. The purpose is to ensure the safety of workers by notifying them.

(Means for Solving Problems) The present invention for solving the above problems is arranged so as to always fit within the prescribed size of the machine base, and if necessary, the outside of the machine base using an electric motor as a drive source. In a forklift truck equipped with an auxiliary device that is extended, a warning circuit that notifies the extension operation when the auxiliary device is extended to the outside of the machine is provided, and the drive circuit of the electric motor includes:
It is a gist to provide a delay circuit for delaying the start-up of the electric motor so that the alarming operation of the alarm means precedes the start-up of the electric motor.

(Operation) In the outboard outrigger alarm device for a forklift accessory according to the present invention configured as described above, the alarm means for notifying the overhang operation of the accessory when the accessory is outboarded is provided. By issuing an alarm prior to the overhang operation, it is possible to call attention to surrounding workers in advance.

(Embodiment) An embodiment of the present invention will be specifically described below with reference to the drawings. First, the embodiment shown in FIGS. 1 to 3 will be described. This embodiment is an example applied to a parent-child forklift truck equipped with a front confirmation device as an accessory device. First, the parent-child forklift truck and its front confirmation device will be described. The parent-child forklift truck, as shown in FIG. 2 and FIG.
A parent lift 1 as a forklift body, and a child lift 5 that is detachably locked via a hook 4 to an elevating member 3 composed of a lift bracket and a finger bar that ascends and descends along a mast 2 of the parent lift 1. Has been done,
The child lift 5 having the cargo W loaded on the legs 6 (forks) is separated from the parent lift 1 and run in the container C to load the cargo W into the container C.

The front confirmation device 7 as an accessory device is composed of a TV camera 8 for photographing the left and right lower portions of the frontage of the container C and a TV monitor 9 for displaying the image, and the TV camera 8 has an extendable and retractable support arm 10. Through parent lift 1
Is installed in the vicinity of the lifting member 3 or the front surface of the front protector 11 (front protector 11 in this embodiment),
The TV monitor 9 is arranged at a position where it can be easily seen from the driver's seat, for example, above the front protector 11.

Further, the left and right support arms 10 each having the television camera 8 at its tip end are movably fitted into a rectangular tube-shaped arm guide 12 extending horizontally in the front surface of the front protector 11 so as to be movable. It is possible to expand and contract in the width direction. In the reduced state, the TV camera 8 is mounted on the stand 13
It is set so that it fits within the width of the machine, and when it is extended, it extends beyond the machine base width and sticks out of the machine.

Further, the extension and contraction operation of the support arm 10 is performed by a drive mechanism having the electric motor 24 shown in FIG. 1 as a drive source. 24 is used as a drive source, and the left and right support arms 10 are extended and contracted by using a rack and pinion mechanism or a winding electric mechanism such as a belt or a chain.

Next, an alarm device for issuing an alarm in response to the operation of the front confirmation device 7 to extend to the outside of the machine will be described with reference to FIG.

FIG. 1 shows a drive circuit of an electric motor 24 for extending and retracting the support arm 10 and an alarm chime 21 as an alarm means.
FIG. 3 is an electric circuit diagram showing an alarm circuit including the electric motor 24 and an alarm chime 21 connected in parallel to a battery 23. Then, the start switch 25 and the coil of the delay relay 29 are inserted on the alarm circuit side, and the delay relay 29 on the drive circuit side of the electric motor 24.
The normally open contact of is inserted.

That is, the drive circuit of the electric motor 24 is provided with a delay circuit that delays the activation of the electric motor 24 so that the alarm chime 21 notification operation precedes the activation of the electric motor 24.

Although the electric motor 24 is omitted in its concrete illustration, it is a DC motor having a forward / reverse rotation contactor, like a drive motor generally used for driving a battery forklift. The switching of the rotation direction is controlled by the forward / reverse selector switch.

The alarm device of the present embodiment is configured as described above, and therefore, during cargo handling work, a tall cargo W stacked on the child lift 5 and having a large lateral width exceeding the vehicle width and a tall width.
In the case of loading the container C into the container C, when the activation switch 25 is turned on to operate the front confirmation device 7, first, the alarm chime 21 starts to sound, and after a while, the electric motor 24 is actuated and the support arm 10 is extended.

That is, according to the present embodiment, the TV camera 8 is the base 1
In the case of projecting to the outside of 3, the alarm chime 21 issues an alarm prior to the actual projecting operation of the television camera 8, so that the surrounding workers can be warned in advance. Therefore, even if there is a worker in the immediate vicinity of the television camera 8, the worker can avoid this with a margin based on the above-mentioned time difference, and the overhang operation and the alarm operation are performed at the same time. Compared with the case, the safety of workers is high.

Even when the support arm 10 is contracted, the alarm chime 2 is activated prior to the activation of the electric motor 24 as in the case of the extension.
1 is activated.

Next, another embodiment of the present invention will be described with reference to FIG. In this embodiment, a yellow rotary lamp 26 and a tape recorder 27 with a speaker are adopted as the alarm means, and the other configurations are similar to those of the above-mentioned embodiments.

Therefore, according to this embodiment, the yellow rotary lamp 26 is rotated and turned on in response to the expansion and contraction operation of the support arm 10, while the tape recorder 27 with the speaker sounds "arm extended" and "arm contracted". It can be generated to call attention to the surroundings. In FIG. 4, 28 indicates a relay.

Although the above-described embodiment is intended for the front confirmation device 7 of the parent-child lift as an accessory device of the forklift, the alarm device of the present invention is an accessory device that extends outward beyond the specified size of the machine base. With a forklift equipped with
It is applicable. For example, as shown in FIG. 5, the driver-equipped swivel base 30 may be applied to a turn lift 31 that can swivel on the machine base 13 to warn the protrusion of the swivel base 30 to the outside of the machine. And the sixth
As shown in the figure, it is applied to a forklift equipped with an inverted L-shaped support arm 33 having a front confirmation mirror 32 at the tip so as to be swingable, and a support with a mirror is provided to confirm the feet from above the luggage W on the fork. It is possible to warn the forward movement of the arm 33.

The alarm means is not limited to the one shown in the figure, and any appropriate means can be adopted as needed.

(Effects of the Invention) As described in detail above, according to the present invention, an auxiliary device of a type that is always arranged so as to be within the prescribed size of the machine base and is extended to the outside of the machine base when necessary is operated. In the equipped forklift, when the auxiliary device is extended to the outside of the machine,
By issuing an alarm, it is possible to protect the surrounding workers, etc. from the extension operation of the auxiliary equipment to the outside of the machine, and especially the time difference between the activation of the alarm means and the start of the extension operation of the auxiliary equipment. Since it is provided, the surrounding workers can avoid the extension of the attachment device with a sufficient time, and there is an effect that the safety is higher.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is an electric circuit diagram showing an alarm circuit and a motor drive circuit, FIG. 2 is a schematic side view of a parent-child forklift equipped with a front confirmation device, and FIG. 3 is a plan view of the same. FIG. 4 is an electric circuit diagram showing an alarm circuit and a motor drive circuit according to another embodiment of the present invention, and FIGS. 5 and 6 show application examples of the alarm device to other accessory devices. 5 is a plan view showing a turnlift equipped with a swivel base, and FIG. 6 is a side view of a forklift equipped with a swing-type support arm having a front confirmation mirror. 1 ... Parent lift, 5 ... Child lift 7 ... Front confirmation device, 8 ... TV camera 9 ... TV monitor, 10 ... Support arm 13 ... Machine stand, 17 ... Telescopic cylinder 19 ... Limit switch , 21 …… Alarm chime 24 …… Electric motor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshihisa Ohno, 2-chome, Toyota-cho, Kariya City, Aichi Prefecture Toyota Industries Corporation (56) References: Showa 57-46665 (JP, U) Sho 56-55069 (JP, U) Actual opening Sho 56-768 (JP, U) Actual opening Sho 64-3791 (JP, U) Actual public Sho 55-34224 (JP, Y2)

Claims (6)

[Scope of utility model registration request] 1. A forklift truck, which is always arranged so as to fit within a prescribed size of a machine base, and which is provided with an accessory device that is operated to extend outside the machine base by using an electric motor as a drive source, if necessary. An alarm means is provided for notifying the extension operation when the extension operation to the outside of the machine is performed, and the drive circuit of the electric motor is configured such that the notification operation of the alarm means precedes the activation of the electric motor. Outboard warning device for a forklift accessory equipped with a delay circuit that delays the startup of the forklift. 2. The outboard warning device for a forklift accessory according to claim 1, wherein the accessory is a television camera for forward confirmation that extends and extends laterally beyond the vehicle width. 3. The outboard warning device for a forklift accessory according to claim 1, wherein the forklift is a turnlift having a turntable with a driver's seat so that the turntable can swivel on the machine base. 4. The overhang warning device for a forklift accessory according to claim 1, wherein the accessory is a front confirmation mirror that is operated to extend above the fork. 5. The overhang warning device for a forklift accessory according to claim 1, wherein the warning means is a chime for a utility model registration. 6. The outboard warning device for a forklift accessory according to claim 1, wherein the alarm means is one of a revolving light and a tape recorder with a speaker, or a combination thereof.