JP2002080195A - Small sized forklift coping with large load - Google Patents

Abstract

PROBLEM TO BE SOLVED: To downsize and lighten the car body of a forklift, and expand and contract even the length of a fork so that it can handle a cargo from a small light load to a large heavy load. SOLUTION: An arm having a wheel and a fork are drawn into a car body, protruded and retracted as necessary when handling a cargo. An outrigger is provided, protruded toward the cargo and retracted in accordance with its load, to support the car body. The fork is divided to plurality, fitted expansibly and contractively, and expanded and contracted to be matched with a size of the cargo.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forklift truck, particularly a small forklift truck capable of handling heavy loads.
For lift trucks.

[0002]

2. Description of the Related Art A counter-type forklift balances a vehicle so that it does not tilt when lifting a load.
Since the balancer must be heavy and the center of gravity of the vehicle must be kept away from the load, the weight of the forklift and the vehicle body will increase,
Even if an outrigger is provided, if the width of the load is larger than that of the outrigger, the outrigger is not useful because it does not enter the load, and if it is so small that the wheels attached to it become small, the soft ground In areas with bumps and bumps, the ground contact area of the wheels is small and cannot fit on the ground, and if the ground contact area is large, the wheel width will be large and the load must be placed with a large gap between the loads and narrow. By the way, there are no counter-type forklifts that can handle large loads with a small size and weight. For this reason, the balancer must be made heavier and the center of gravity of the vehicle must be kept away from the load, and the weight of the forklift and the vehicle become large. The length of the preparative follower - not be the same as the length of the click, straddle Gandolfo - at Clift, Sutoradorua - if the width of the load is greater than the arm, can not handle the load.

[0003]

SUMMARY OF THE INVENTION The present invention provides a forklift capable of handling a heavy load even if the forklift is reduced. Preferably, the forklift is made as small as the length of the forklift. Even if the load is heavy, it can be lifted, and no matter how light the forklift is, even if the load is heavy, it can be lifted even if it is heavy, small, light and easy to use. It is possible to make the forklift small, make it easy to carry, etc. with a small forklift, large loads can not be handled if the fork is short, and the fork depends on the size of the load Make it stretchable.

[0004]

A fulcrum is provided by providing an outrigger which extends and contracts from the vehicle body and has a lower height (thickness) than a pallet and extends the outrigger toward the load. If you move forward and support both sides by extending beyond the center of gravity of the load, no matter how heavy the load is, you can lift the wheel, and if you move the wheels under the raised load to support the load, no matter how heavy the load is, It can be made between the front and rear wheels, and the forklift can run stably,
When the fork is stretchably fitted and the fork is stretched to the maximum and a load such as a load is applied, the load is sensed by detecting the load to prevent the fork from being deformed and unable to expand and contract.
A device for stopping the operation at the time of the bar is attached to prevent the fork from being unable to expand and contract due to deformation.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a fork or an outrigger that expands and contracts from a vehicle body toward a load, an arm with wheels attached to the load, and the like. , Can be freely extended and retracted.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings and reference numerals. FIG. 1 is about to take up the load with a forklift or to end the load. If it is attempted to take a load as shown in FIG. 1, the arm 4 provided with wheels and the fork 3 are retracted into the vehicle body. As shown in the patents 2897205 and 2897206, the forklift trucks can be stored in the vehicle body as shown. First, the outrigger 5 is housed on both sides of the vehicle body as shown by the dotted lines in FIGS. 1 and 2, and is extended rightward and downward as shown in FIGS. 2 and 3, and further outriggers therein. 5A and 5B are extended and grounded on both sides of the pallet 9 as shown in FIGS. 2 and 3, the fork 3 is inserted into the pallet 9, and the load 8 thereon is lifted. Since the outrigger is further grounded forward, the load 8 can be lifted. At this time, if the height of the tip of the outrigger 5A is higher than the height (thickness) of the pallet 9, if the load 8 protrudes significantly to the left and right from the pallet 9, the 5A of the outrigger is held by the load 8. ,
I can't put it forward and can't lift heavy loads. If the height of the outrigger 5A is low, it can be extended forward without holding on to the load 8, and even heavy loads can be lifted, and not only loads loaded on pallets but also containers, etc. By extending 5A or 5B of the outrigger 5, lifting the container, and extending the arm 4 having wheels thereunder, any heavy container can be transported. The height of the outrigger that enters the space between the load and the ground is important depending on the size of the load and the space between the load and the ground. −
The height of the place to be lifted with a container varies depending on the container, and the height from the ground is high, about 17 cm, but there are also types that can not use outriggers, the height of pallets is also various, and there are many around 16 cm Therefore, if the height of the outrigger is set to about 15 cm or less, it seems almost good.

[0007] The distal end portion 5A and the second 5B portion of the outrigger are fitted into the outrigger 5 portion, and although not shown, as shown on a crane jib or a forklift mast, the hydraulic pressure is increased. Can be expanded and contracted with a wire or the like, or can be expanded and contracted by the expansion and contraction method shown in Japanese Patent Application No. Hei 11-143818, "Mounting and expansion and contraction of expansion and contraction device". It can be carried out. As shown in FIG. 4, the portion of the outrigger 5 is composed of two parts: a part which extends right and left from the vehicle body and is supported by the vehicle body, and a part for vertical expansion and contraction.
The parts A and 5B are housed, and a part that extends left and right from the vehicle body and is supported by the vehicle body and a part for up-and-down expansion and contraction are not shown. , Can be moved up and down,
Also, 5A and 5B may have a T-shaped cross section of several millimeters, but may have irregularities, and the corresponding one may have a shape conforming to it, or the lower part may be covered, but it will not fall. 4 and 6, the outriggers are grounded. However, the outriggers need not be grounded in their entirety, but need only be grounded in a required area at the tip. Outrigger as described above
5A and 5B are extended toward the load 8, the fork 3 is inserted into the pallet 9, and the load 8 is lifted as shown in FIG. 3. If the arm 4 having wheels is extended as shown by a dotted line, the vehicle body 1 is extended. Is stable, the outrigger is retracted and stored as shown in FIG. 1, and the forklift is driven.

Although the outriggers have three stages, the outriggers having two stages of expansion and contraction will be described with reference to FIGS. 5 and 6. FIG. 5 is a simplified diagram for explaining the outriggers, and the hatched portion is the outrigger-5. Yes, the horizontal part is where the part that extends forward is stored inside, the rising part can be the same width as the width of the car body, the front is a part with the operating lever of the driver's seat, etc. There is also a counter weight, etc., which can be naturally made the width of the vehicle body, and therefore it is good to expand and contract to the left and right. There is one that expands and contracts up and down as shown in FIG. 4, and the outrigger 5 is grounded as shown in FIG.
Can be extended forward. At this time, outrigger-5
Shortly before grounding, the outrigger-tip 5A portion may be extended forward and grounded. Also, if small wheels are attached to the tip of the outrigger-5A, it is easy to stretch while grounding. And even if you lift the load,
You can move back and forth a little as it is. In short, it is only necessary to provide a support for the load, and two, three or more stages may be provided.

An arm 4 having wheels is a straddle arm, which is divided into two parts, left and right, as shown in FIG. 2. The arm 4 is extended, and the mast 2 is supported by the arm 4 so as to be forward and backward. If it is moved, it can be used in the same manner as a conventional reach-type forklift. If the straddle arm of the conventional reach-type forklift is applied to the present invention, the arc shown by a dotted line in FIG.
If the outrigger is attached to the straddle arm, the load is naturally supported by the load side in front of the vehicle body when the load is lifted, and the load is taken up by the fork supported by the mast. When the outrigger is retracted, the mast is retracted, and the load is moved onto the straddle arm, the arm 4 in FIG. 3 becomes a state shown by a dotted line, which is a conventional reach type fork. -A counter type forklift that can stably run by pulling out the outrigger as well as attaching an outrigger to the clift, and a conventional forklift that cannot pull the fork into the vehicle body, as indicated by the dotted line in FIG. When the outrigger is provided in a state where the arm 4 shown is shown by a contracted solid line and the front wheel is extended so as to be able to extend forward of the vehicle body,
This is the same as the above-mentioned reach type, and the present invention can be used in the same manner as the conventional reach type forklift and counter type forklift, and is a convenient forklift which can be used properly as required. Becomes Although the arm 4 having wheels is a bifurcated straddle arm, it is not always necessary to have a bifurcated arm, and if the arm 4 is connected at the lower part of the left and right arms, it can be made more robust. The outrigger is also provided on the arm 4, and if you support the front further from it, when handling loads in high places, the vehicle body will be more stable, prevent accidents, and not only the front and rear of the vehicle body, but also the width of the left and right of the vehicle body If the forklift can be expanded and contracted, the forklift can be used more stably, and if the vehicle body is lifted by the outrigger, the wheels can be easily turned by 90 degrees and the forklift can be easily moved sideways.

Referring to the expansion and contraction of the fork, FIG. 7A shows a state in which the fork 3 is contracted, FIG. 7B shows a state in which the fork 3 is expanded, and FIG. Things
3A fits inside the outer 3B and is expandable and contractable. In (d), the tip of the fork 3A is one, but the opposite side is divided into two. The cross-section of the 3B to which is fitted is also shown on the right side of the figure.
Although it is designed to fit in several places, it may be divided into many parts to make it wide, and it may be manually stretched and fixed with pins etc. (not shown) so that it does not expand and contract. Instead of manually, like a mast or crane jib,
It may be expanded and contracted by operation such as hydraulic pressure or wire,
Any method of expansion and contraction is possible, but if it is expanded and contracted, the fork is not too long for a small load, and the fork is not too short for a large load. In order to prevent the fork from expanding and contracting, the sensor works when the load is already applied too much, and there is a forklift that prevents the load from being lifted by the fork. If the sensor works before the fork is deformed due to the excessive load, and the fork is stopped from deforming, the fork does not stop expanding and contracting.

[0011]

According to the present invention, the total length of the forklift can be reduced to the length of the fork, so that the forklift can be turned easily and is easy to use. No matter how light it is,
A forklift that can lift and transport even heavy loads can be provided. Forklifts that cannot retract the fork into the vehicle body, such as a conventional counter-type forklift, expand and contract with the outrigger that expands and contracts. By installing the arm with wheels, the outrigger and the front wheel are moved, and the front wheel is moved under the load, so that the entire length of the forklift is longer than that of pulling the fork into the vehicle body. Although it is long, it can be lifted and transported no matter how light the body or how heavy the load is. With the reach type, the outrigger can be provided to lift the vehicle no matter how light or heavy the body is. It can be a forklift that can be transported, especially in a counter-type forklift, since the load is lifted and transported outside the wheels of the vehicle body, the load is finally lifted and transported, and it falls over But any accident is likely to occur,
Since the present invention can move and move the wheels under the load,
It can run the forklift in a stable state, prevent accidents, can be used in narrow places that could not be used even if you wanted to use the forklift, and the length of the fork was length according to the size of the load The forklift can be adjusted without any trouble even if the load is small, and the fork length is not too short, even if the load is large. Can be provided with a forklift that is easy to use because of its light weight and small size, and can be provided in a convenient place. Furthermore, on April 27, 1999, the application number of Japanese Patent Application No. 11-159976 and “for cargo handling vehicles” mast"
By using the mast of the application 2000-169785, the mast can be greatly shortened, and a forklift that is easy to use, safe, and efficient can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention, in which an arm 4 is retracted into a vehicle body.

FIG. 2 is a plan view in which an outrigger is extended.

FIG. 3 is a side view for explaining the operation of the arm 4 and the outrigger when lifting a load.

FIG. 4 is an explanatory view of an outrigger.

FIG. 5 is an explanatory view of an outrigger.

FIG. 6 is an explanatory view of an outrigger.

FIG. 7 is an explanatory diagram of a fork.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Whole forklift 2 Mast 3 Fork 4 Arm 5 Outrigger 6 Backrest 7 Wheel 8 Load 9 Pallet 10 Recess

Claims (3)

[Claims] The present invention relates to a forklift having wheels and forks on a vehicle body for lifting and lowering a load, and a forklift configured to draw a fork into or out of a vehicle body. In a forklift provided with an outrigger extending from a vehicle body to a load side, an arm for supporting the vehicle body having wheels in contact with the ground on the fork side includes:
A forklift capable of handling a small and large load, wherein the forklift extends between the load lifted by the fork and the ground from the vehicle body and is retracted toward the vehicle body. 2. A forklift, which has wheels and forks on a vehicle body and carries a pallet loaded with the forks up and down, is provided with an outrigger extending from the vehicle body to the load side for vehicle stability. In the forklift, an arm provided with wheels is provided under the load placed on the fork from the vehicle body so that the wheel on the load side of the vehicle body can be moved below the load on the load side from the vehicle body. Characterized by being able to move,
Small forklift for large loads. 3. The vehicle body has wheels, masts and forks.
To stabilize the body of a forklift configured to move a fork to a vehicle body side or to move from a vehicle side to a load side in a forklift for lifting and lowering and transporting a pallet loaded with a load on the fork. A forklift provided with an outrigger extending from the vehicle body to the load side,
The height (thickness) of the part located in front of the mast
A small, large-load forklift characterized by a centimeter or less.