JPH0116695Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a low lift that is effective for transportation work in narrow factories and warehouses.

Conventional technology Conventionally, a low lift equipped with a drive wheel on the vehicle body side and a road wheel on the underside of the tip of the fork that can raise and lower the fork performs transportation work such as pallet work with the road wheel always in contact with the ground. It is something. Therefore, when inserting a fork into the pallet, no problem will occur in the case of a single-sided pallet, but in the case of a double-sided pallet, the load wheel 7 will be inserted into the ground side of the pallet P, as shown in Figure 5a. When getting over the edge board or deck board B, the pallet P may escape due to the pushing force, or the fifth
As shown in Figure b, when the road wheel 7 passes over the edge board B, the lower surface of the fork and the upper surface of the board come into contact, and the pallet P escapes due to the frictional force of the contact surface, causing the fork to be damaged. There was a drawback that the insertion operation was difficult.

OBJECT OF THE INVENTION An object of the present invention is to provide a low lift that can eliminate the above-mentioned conventional drawbacks and facilitate the operation of inserting a fork into a pallet.

Composition of the invention The invention consists of a vehicle body equipped with a drive wheel,
A low lift equipped with a fork connected to the front of the vehicle body via a link so that it can be raised and lowered and extending forward, and a road wheel for raising and lowering the fork that is attached to the tip of the fork so that it can be raised and lowered through an arm. , on the base end side of the fork, when the fork descends due to the lodging operation of the road wheel, the fork is held in a floating position at a predetermined height from the floor by touching the road surface during the descent, and the fork is held at a floating position at a predetermined height from the floor surface, and when the fork is lowered by the lowering operation of the road wheel, the fork is held at a floating position at a predetermined height from the floor surface, Auxiliary wheels are provided that float off the road surface when the fork rises, and the height of the auxiliary wheels can be adjusted to accommodate changes in the floating position of the fork.

Embodiments Hereinafter, embodiments of the present invention will be specifically described with reference to FIGS. 1 to 4. In the figure, 1 is a car body with built-in drive units and hydraulic units for lifting and lowering, and a drive wheel 2 at the bottom, 3 is a handle with switches and levers for various operations, and 4 is a pair of left and right wheels located at the front of the car body. This is a storage box for a battery 4a connected to the vehicle body 1 by a link 5, and a pair of left and right forks 6 are integrally extended forward at the lower front of the battery storage box 4. Each of the forks 6 has a groove-shaped cross section with an open bottom, and a road wheel 7 for raising and lowering the fork is attached to the lower surface of the tip of the fork so as to be rotatable in the vertical direction via a support arm 8 with a pin 8a. There is. The road wheel 7 is raised and lowered (raised and lowered) by a lift cylinder 9 which is disposed between the vehicle body 1 and the battery storage box 4 and whose one end is connected to the link 5.
The support arm 8 of the road wheel 7 and the other end of the lift cylinder 9 are connected via a link mechanism 10. Although not shown in the drawings, a link length adjustment means is installed at any location of the link mechanism 10, so that the amount of elevation of the road wheel 7, that is, the amount of lift of the fork 6 can be adjusted as necessary. It's getting old.

In the above-mentioned low lift, auxiliary wheels 11 are disposed at the lower portions of both left and right sides of the front side of the battery storage box 4, which is the proximal end side of the fork 6. As shown in FIG. 4, it is constructed in a rotating caster type supported by a table-shaped rotating fitting 12. The rotating fitting 12 is attached to a bracket 13 protruding from the battery storage box 4 via an adjusting screw shaft 14 and a nut 15 so that its vertical position can be adjusted, and the auxiliary wheel 11 is shown in FIGS. 1 and 2. The height position of the fork is determined so that it rises above the ground when it rises and touches the ground when it descends.In this case, considering the thickness t of the board B of the double-sided pallet P, the fork 6 It is adjusted so that it is within the height h of the opening.

This embodiment is configured as described above,
Therefore, when the load wheel 7 is folded down and stored in the fork 6 by operating the lift cylinder 9 for reduction, the auxiliary wheel 11 is moved as shown in FIG.
In order to keep the fork 6 in a floating state by touching the ground, in this state, the fork 6 can be easily moved into the opening of the double-sided pallet P by moving the vehicle forward or backward using the drive wheel 2 and the auxiliary wheels 11. It can be inserted or removed.

Also, after inserting the fork, lift cylinder 9
When the road wheel 7 is extended and the fork 6 is raised, the auxiliary wheel 11 rises from the ground as shown in FIG. 7 can be used for transportation.

Note that the use of the auxiliary wheels 11 is not limited to the operation of inserting and removing the fork 6, but can also be used when traveling with no load.

In the illustrated embodiment, the auxiliary wheels 11 are attached to the battery storage box 4, but in short, any structure is sufficient as long as they move up and down together with the fork 6, and therefore, they may be attached directly to the fork 6.

Effects of the Invention As detailed above, according to the present invention, when working with pallets using a low lift, the fork can be held in a floating state if necessary, so operations for inserting and removing pallets can be easily performed without the problems of the conventional method. This greatly contributes to improving the efficiency of pallet work. In particular, in the present invention, the auxiliary wheels are provided on the base end side of the fork, which is connected to the front of the vehicle body via a link so that it can be raised and lowered, so that it moves up and down together with the fork. In this case, there is no need to raise and lower the auxiliary wheels in conjunction with the raising and lowering of the road wheels, which is extremely effective in simplifying the structure and allowing stable running. Furthermore, since the height position of the auxiliary wheels can be adjusted, it is possible to easily accommodate the case where the boards of the double-sided pallet have different thicknesses. Furthermore, the present invention allows the vehicle to travel by using road wheels and auxiliary wheels, and has excellent turning performance when using the auxiliary wheels.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention.
The figure is a side view of the low lift when running (working) using the auxiliary wheels, Figure 2 is a side view of the low lift when running using the road wheels, and Figure 3 is a side view of the low lift when running (working) using the auxiliary wheels.
The figure is a perspective view showing the auxiliary wheel, FIG. 4 is a side sectional view, and FIG. 5 is an explanatory view showing a conventional example. 1...Vehicle body, 2...Drive wheel, 3...
Battery storage box, 6... fork, 7... road wheel, 9... lift cylinder, 11... auxiliary wheel.

Claims (1)

[Scope of utility model registration request] A vehicle body equipped with a drive wheel, a fork connected to the front of the vehicle body so that it can be raised and lowered through a link and extending forward, and a fork that is attached to the tip of the fork so that it can be raised and lowered through an arm. In a low lift equipped with a road wheel, the base end side of the fork has a structure that when the fork descends due to the lodging operation of the road wheel, the fork touches the road surface on the way down, and the fork is brought to a floating position at a predetermined height from the floor surface. The low lift is provided with auxiliary wheels that float from the road surface when the fork rises due to the standing motion of a road wheel, and the height of the auxiliary wheels can be adjusted to correspond to changes in the floating position of the fork.