JP2003112895A - Low lift truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low lift truck for preventing the dislocation and collapse of cargoes lifted up due to a speed change during carriage. SOLUTION: The low lift truck 10 comprises a body 11 provided with a travelling device and a platform 12 elevatably mounted on the body for loading the cargoes, wherein a fall-down preventing mechanism 13 is provided protruding on the upper face of the platform for constraining the movement of the cargoes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-lift truck, and more particularly to a low-lift truck capable of preventing the collapse of a lifted load.

[0002]

2. Description of the Related Art Conventionally, a low lift truck having a structure shown in FIG. 10 is known as a low lift truck used for carrying loads loaded on a cart or the like.

In the figure, a low lift truck indicated by reference numeral 1 is a main body 2 provided with a traveling device, and the main body 2
And a platform 3 mounted so as to be able to move up and down.

Further, the main body 2 is provided with a swingable operation arm 4 and an operation panel 5 provided at a swing end portion of the operation arm 4, and a lower portion of the main body 2 is provided. A drive wheel 6 which is rotationally driven by a traveling device (not shown) mounted in the main body 2 is provided, and further, a side portion (front portion) of the main body 2 is mounted in the main body 2. An elevating body 7 that is moved up and down by a drive mechanism (not shown) is attached, and the platform 3 is attached to the elevating body 7.

At the bottom of the platform 3, a car cart W to be lifted by the platform 3 is provided.
A road wheel 8 that supports the weight of the luggage loaded on the car trolley W is provided. The load wheel 8 is supported by a swing arm 9 which is swung by the drive mechanism, and the swing arm 9 is swung downward when the elevating body 7 is raised. As a result of the road wheel 8 being projected below the platform 3, the platform 3 is operated in cooperation with the elevating body 7.
Can be raised.

The platform 3 is a strip that is held at the lowest position, and is lifted after being inserted below the car carriage W and then raised, as shown by the solid line in FIG. It is like this. Then, the low lift truck 1 is made to travel by operating the operation panel 5 in a state where the car carriage W is lifted as described above, and carries the cargo.

[0007]

By the way, in such a conventional low lift truck 1, it is assumed that the car carriage W on the platform 3 is displaced during acceleration or deceleration during the transfer operation. If this deviation is large, the car cart W may fall from the platform 3 and tilt, as shown by the chain line in FIG. When the car trolley W inclines in this way, the load loaded on the car trolley W collapses, and therefore a countermeasure is required.

The present invention has been made in view of the above-mentioned problems of the prior art. Even if the speed changes during transportation, it is possible to prevent the lifted load from shifting and prevent the load from collapsing. The purpose is to provide a low lift truck that can.

[0009]

In order to achieve the above-mentioned object, a low lift truck according to a first aspect of the present invention is provided with a main body provided with a traveling device, and is attached to the main body so as to be able to move up and down. A low-lift truck having a platform on which luggage is mounted, wherein the platform is provided with a fall prevention mechanism that is projected to an upper surface of the platform and restrains movement of the luggage. To do.

In a lift truck according to a second aspect of the present invention, the fall prevention mechanism according to the first aspect includes an engaging plate rotatably mounted on the platform, and the engaging plate is the platform. It is characterized in that it is adapted to be projected above the platform by being rotated by a lift mechanism for raising and lowering.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. In these drawings, reference numeral 10 indicates a low lift truck according to the present embodiment. The low lift truck 10 is provided with a main body 11 on which a traveling device is provided, and is attached to the main body 11 so as to be able to move up and down and to carry a load. The platform 12 is provided with a fall prevention mechanism 13 which is projected to the upper surface of the platform 12 and restrains the movement of the load.

More specifically, a drive wheel 14 is provided in the lower portion of the main body 11, and an elevating body 15 is attached to a side portion (front portion), and the platform 12 is mounted on the elevating body 15. It is attached and can be raised and lowered together with the platform 12.

A load wheel 16 is swingably mounted on a lower portion of the platform 12 via a swing arm 17. As shown in FIG. 2, the swing arm 7 is swingably attached to a pair of brackets 18 projectingly provided on the lower surface of the platform 12 via a pin 19, and The road wheel 8 is rotatably attached to the swing end.

A lift mechanism 2 for raising and lowering the platform 12 is provided at a substantially middle portion of the swing arm 17.
One end of the tie bar 21 forming 0 is connected to be relatively rotatable. The lift mechanism 20 includes the tie bar 2
The other end of 1 is rotatably connected by a pin 22
A first character-shaped link 23 is provided, and a substantially middle portion of the first link 23 is rotatably attached to the platform 12 by a pin 24 as described in detail with reference to FIG. An end portion on the opposite side to the connected side is rotatably attached to the main body 11 by a pin 25.

On the other hand, as shown in FIG. 4, a parallel link is formed between the elevating body 15 and the main body 11 to connect the first elevating body 15 and the main body 11 to each other. A link 26 is provided. Also, the lifting body 15
A hydraulic cylinder 27 that vertically moves the elevating body 15 is provided between and the main body 11. Therefore, in the present embodiment, the tie bar 21 and the first link 2 are
The lift mechanism 20 is constituted by the third link, the second link, and the hydraulic cylinder 27.

The lift mechanism 20 has the first link 23, as shown in FIGS. 3 and 4, when the lifting / lowering body 15 is lifted by the hydraulic cylinder 27.
Is rotated around the pin 25 on the main body 11 side, the tie bar 21 is pulled toward the main body 1 side, and the swing arm 17 to which the road wheel 16 is attached is directed downward by the tie bar 21. The platform 12 is caused to be swung up, thereby raising the platform 12.

As shown in FIG. 5, the fall prevention mechanism 13 includes an engaging plate 28 rotatably mounted on the platform 12. One end of the engagement plate 28 is swingably attached to the platform 12 by a pin 29, and an upward swinging motion causes the platform 12 to move through an opening 30 formed in the platform 12. It can be made to project above 12.

Between the substantially middle portion of the engaging plate 28 and the tie bar 21, one end is rotatably connected to the engaging plate 28 and the other end is fixed to the tie bar 21. A tow rod 31 is provided. The tow rod 31 is provided with the tie bar 21 when the platform 12 is lifted by the lift mechanism 20.
At the same time, the engagement plate 28 is rotated upward by being pulled toward the main body 11 side, and the engagement plate 28 is projected from the opening 30 to the upper portion of the platform 12.

On the other hand, in the present embodiment, an example in which parcels to be conveyed are conveyed in a state of being loaded on the car carriage W as in the conventional example is shown. Further, in FIG. 4, reference numeral 32 indicates a limit switch which is operated by the second link 26 when the elevating body 15 is moved to the ascent limit, and which regulates the ascending limit position of the elevating body 15. .

In order to convey the car carriage W by the low lift truck 10 according to the present embodiment having the above-described structure, first, the elevating body 15 is lowered as shown in FIG. The lift truck 10 is moved forward to feed the platform 12 below the car cart W. When the platform 12 is inserted below the car carriage W, the engagement plate 28 is housed in the platform 12, so that the engagement plate 28 can be smoothly inserted without interfering with the car carriage W. You can

Then, the hydraulic cylinder 27 is operated to raise the lifting body 15. The tie bar 21 is pulled toward the main body 11 by the first link 23 as the lifting body 15 is moved upward, whereby the swing arm 17 is swung downward, and the load wheel 16 is supported by the support body. As the tip of the platform 12 is pushed up,
, But can be raised in a substantially parallel state. As a result, the car trolley W is lifted while keeping the level as shown in FIG.

Then, in synchronization with the upward movement of the platform 12 described above, the pulling rod 31 is also pulled in toward the main body side, whereby the engaging plate 28 connected to the pulling rod 31 is rotated upward. And opening 3
It is projected from 0 to above the platform 12.
As a result, the car cart W, as shown in FIG.
It is positioned so as to be sandwiched between the lifting body 15 and the engagement plate 28. As a result, by moving the low lift truck 10 to a desired position, it is possible to transport the luggage together with the car carriage W to a predetermined position.

Then, during the transportation as described above,
At the time of acceleration such as when the low lift truck 10 starts traveling, or at the time of deceleration such as stop, an inertial force acts on the car carriage W and a phenomenon occurs in which the car carriage W is displaced with respect to the platform 12. However, in the present embodiment, Since the engaging plate 28 and the elevating / lowering body 15 exist before and after the acting direction of the inertial force, the car cart W is moved to the platform 12
From falling off.

The shapes, sizes, etc. of the respective constituent members shown in the above embodiment are merely examples, and can be variously changed based on design requirements and the like. For example, in the above-described embodiment, as the action of the lift mechanism 20, the platform 12 is raised by pulling the tie bar 21 toward the main body side, and the engagement plate 28 constituting the fall prevention mechanism 13 is rotated upward. Although an example is shown, by changing the direction of the first link 23, the tie bar 21 is pushed out in the direction of separating from the main body 11, thereby raising the platform 12 and rotating the engaging plate 28 upward. It can also be done. In addition, the platform 12 of the engagement plate 28
A cam mechanism may be provided between the engaging plate 28 and the tie bar 21 to move the engaging plate 28 up and down in the vertical direction. Further, the projecting operation and the storing operation of the engagement plate 28 may be directly driven by a drive mechanism provided separately from the lift mechanism 20.

Further, as shown in FIGS. 8 and 9, by adjusting the engagement plate 28 to the shape of the carriage W, the displacement of the carriage W in the width direction of the platform 12 can be prevented. For example, the trolley W
In the case of a basket, a recess 28 is formed at the tip of the engaging plate 28.
By forming a in advance and engaging the frame of the car with the recess 28a, it is possible to prevent the above-described lateral displacement.

[0026]

As described above, according to the low lift truck of the present invention, the platform on which the load is mounted is projected to the upper surface of the platform to drop the load so as to restrain the movement of the load. By providing the prevention mechanism, it is possible to prevent excessive displacement of the package during acceleration or deceleration during the transportation of the package, to ensure reliable transportation, and to prevent the collapse of the package.

According to another aspect of the low lift truck of the present invention, the fall prevention mechanism is constructed by rotatably mounting the engaging plate on the platform, and the engaging plate moves up and down the platform. Since it is made to project above the platform by being rotated by a lift mechanism, the engagement plate is projected onto the platform in synchronization with the lifting operation of the package by the platform, and the position shift of the package is prevented. It can be surely prevented from falling.

[Brief description of drawings]

FIG. 1 is a side view showing a lift mechanism and a fall prevention mechanism according to an embodiment of the present invention.

FIG. 2 shows an embodiment of the present invention and is a plan view showing a lift mechanism and a fall prevention mechanism.

FIG. 3 is a side view for explaining the operation of the lift mechanism and the fall prevention mechanism according to the embodiment of the present invention.

FIG. 4 shows an embodiment of the present invention and is an enlarged side view of a main part of a lift mechanism.

FIG. 5 shows an embodiment of the present invention and is an enlarged side view showing a main part of a lock mechanism.

FIG. 6 is a side view for explaining the operation of the embodiment of the present invention.

FIG. 7 is a side view for explaining the operation of the embodiment of the present invention.

FIG. 8 is a front view of a main part showing a modified example of the present invention.

FIG. 9 is an enlarged side view of essential parts showing a modified example of the present invention.

FIG. 10 is a side view showing a conventional example.

[Explanation of symbols]

1 low lift truck 2 body 3 platforms 4 operation arm 5 control panel 6 drive wheel 7 Lifting body 8 road wheels 9 Swing arm 10 low lift truck 11 body 12 platforms 13 Fall prevention mechanism 14 drive wheel 15 Lifting body 16 road wheels 17 Swing arm 18 bracket 19 pin 20 Lift mechanism 21 tie bar 22 pin 23 First Link 24 pin 25 pin 26 Second Link 27 hydraulic cylinder 28 Engagement plate 28a recess 29 pin 30 openings 31 Tow rod 32 limit switch W basket cart

Claims (2)

[Claims] 1. A low lift truck comprising a main body provided with a traveling device, and a platform mounted on the main body so as to be able to move up and down, and on which a load is mounted. The low lift truck projects on the platform to an upper surface of the platform. A low-lift truck, which is provided with a fall prevention mechanism for restraining the movement of the luggage. 2. The fall prevention mechanism includes an engagement plate rotatably mounted on the platform, and the engagement plate is rotated by a lift mechanism for moving the platform up and down to raise the platform. The lift truck according to claim 1, wherein the lift truck is configured so as to be projected to the inside.