JP3776005B2 - Forklift with road stabilizer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a forklift with a load stabilizer that presses an upper surface of a load lifted by a fork so as not to collapse the load.
[0002]
[Prior art]
A conventional forklift with a load stabilizer is shown in FIG. This is because a lift bracket 5 with a fork 4 is disposed on a pair of inner masts 3 that can be moved up and down along a pair of outer masts 2 on the vehicle body 1. A lift cylinder 7 for raising and lowering and directly raising and lowering both inner masts 3 is provided, and a load stabilizer 8 for pressing the upper surface of the load W lifted by the fork 4 is provided.
[0003]
The load stabilizer 8 includes a hydraulic cylinder 10 provided on the lift bracket 5 and a pressing member 12 that is lifted and lowered by the hydraulic cylinder 10 via a coupling mechanism 11. Reference numeral 13 denotes a backrest.
[0004]
In the above configuration, for example, when a large number of loads W packed with a plurality of straw cultivation containers are transported, the forks 4 are inserted into the pallet P after the loads W are stacked on the pallet P, and the lift cylinder 7 is extended. When the fork 4 is driven to lift the load W via the pallet P, the hydraulic cylinder 10 is driven to contract and the pressing member 12 is pressed against the upper surface of the load W to clamp the load W. Good. As a result, the vehicle body 1 can be moved and transported to a predetermined position so that the cargo W is not collapsed.
[0005]
[Problems to be solved by the invention]
In the above conventional configuration, the hydraulic cylinder 10 and the coupling mechanism 11 are used as the load stabilizer 8, and the structure is complicated and the manufacturing cost is high, and the load stabilizer 8 is heavy and loads the lift bracket 5 as a load. Since it is directly applied, it is necessary to reduce the weight of the load W lifted by the fork 4 by the load, and the conveyance efficiency is lowered.
[0006]
An object of the present invention is to provide a forklift with a load stabilizer that has a simple structure, a low manufacturing cost, and high conveyance efficiency in view of the above-described conventional drawbacks.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a lift bracket with a fork is disposed on a pair of inner masts that can be lifted and lowered along a pair of outer masts on a vehicle body. A lift cylinder is provided that lifts and lowers both inner masts directly through a chain mechanism, and includes a pressing member that presses the upper surface of the load when the load loaded on the fork is lifted. A lifting member that is fixed to both inner masts and is rotatably supported by a lift cylinder by rotatably supporting a sprocket wheel of the chain mechanism, and a cross beam constructed between the upper ends of the inner masts opposite thereto. A free lift clearance is formed between them, raising and lowering the lifting member and pressing it against the horizontal beam Until the fork is lifted, the distance between the fork in the lowest state and the holding plate minus the height of the load lifted by the fork is set within the range of the free lift clearance. It is characterized by having.
[0008]
According to the above configuration, the pressing member fixed to both inner masts is used as a load stabilizer, and the load lifted by the fork is pressed against the pressing member to clamp the load. Therefore, a hydraulic cylinder or the like is unnecessary, so the structure is simple and the manufacturing cost is low. Further, since the pressing member is lightweight and its weight is not directly applied to the lift bracket, a heavy load can be lifted by a fork compared to the conventional case, and the conveyance efficiency is high.
[0009]
Moreover , according to the said structure, a load can be reliably clamped with a moderate clamp force with a fork and a press plate using a free lift clearance, and can be conveyed so that a load may not collapse.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 and FIG. 2 show a forklift with a free lift type load stabilizer according to an embodiment of the present invention, and a pressing member 12 is fixed to both inner masts 3 as a load stabilizer 8. Since the configuration other than the above is substantially the same as that of the conventional example shown in FIG.
[0011]
As shown in FIG. 3, the pressing member 12 includes a horizontal pressing plate 12a and a pair of left and right brackets 12b fixed to the pressing plate 12a. Between the brackets 12b and the pressing plate 12a. A substantially triangular reinforcing girder 12c is fixed, and a base plate 15 is fixed to the front face of each inner mast 3 by welding or the like so as to face each bracket 12b. Screw holes 16 are formed, and bolts 17 are screwed into desired screw holes 16 through through holes formed in the upper and lower ends of each bracket 12b to fix the holding plate 12a to both inner masts 3. Yes.
[0012]
According to the above configuration, the pressing member 12 can be attached to the inner mast 3 by simply fixing the pair of left and right brackets 12b to the base plate 15 with the bolts 17. In this case, the necessary processing is performed on the inner mast 3 on the inner side. The load stabilizer 8 can be easily attached to an existing forklift simply by fixing the base plate 15 to the existing forklift. Further, since the presser plate 12a is reinforced by the reinforcing girder 12c, the upper surface of the load W can be reliably pressed by the presser plate 12a, and the strength of the presser plate 12a is reduced by the amount of the reinforcement. Can be reduced in weight. Furthermore, the height of the holding plate 12a can be adjusted according to the height of the load W to be lifted by the fork 4 by screwing the bolts 17 into the desired screw holes 16 of the base plates 15 through the brackets 12b. it can.
[0013]
As shown in FIG. 1, the chain mechanism 6 has a chain 6a having one end connected to the outer mast 2 and the other end connected to the lift bracket 5, and a sprocket wheel 6b engaged with the chain 6a. A free lift clearance C between the elevating member 19 supported by the lift cylinder 7 so as to be rotatably supported by the sprocket wheel 6b and the cross beam 20 installed between the upper ends of the inner masts 3 opposite to the elevating member 19 is provided. The fork 4 alone is raised until the elevating member 19 is raised and pressed against the cross beam 20.
[0014]
As shown in FIG. 4, the height (including the thickness t of the upper deck of the pallet P) h is subtracted from the distance H between the fork 4 and the holding plate 12a in the lowest lowered state. The interval d (= H−h) is set within the range of the free lift clearance C having a maximum width of about 300 mm to 400 mm, for example (0 <d <C).
[0015]
Referring to FIG. 4, for example, as shown in FIG. 4, the cargo W packed with a plurality of straw cultivation containers is stacked on the pallet P, and then the fork 4 is moved to the pallet as shown in FIG. 5 (a). Then, the fork 4 is lifted only via the chain mechanism 6 by driving the lift cylinder 7 to extend. As a result, as shown in FIG. 5B, the upper surface of the load W lifted by the fork 4 via the pallet P is pressed against the holding plate 12a, and the load W is clamped appropriately between the fork 4 and the holding plate 12a. Securely clamped by force. Thereafter, by traveling the vehicle body 1, the load W can be transported to a predetermined position so as not to collapse.
[0016]
According to the above configuration, the pressing member 12 fixed to the inner masts 3 is used as the load stabilizer 8, and the load W lifted by the fork 4 is pressed against the pressing member 12 to clamp the load W. In addition, since the hydraulic cylinder 10 (see FIG. 6) or the like is not necessary for the clamping, the structure is simple and the manufacturing cost is low. Further, since the pressing member 12 is light and its weight is not directly applied to the lift bracket 5, the fork 4 can lift the heavy load W compared to the conventional case, and the conveyance efficiency is high.
[0017]
Here, even if the fork 4 continues to rise after the completion of clamping, so-called lift overrun occurs, as shown in FIG. 5 (c), the inner mast 3 is only pushed up by the lift overrun. There is no possibility that an excessive clamping force is applied to the load W.
[0018]
In the above embodiment, the forklift in which the free lift clearance C is formed between the elevating member 19 and the cross beam 20 has been described as an example. However, the forklift in which the elevating member 19 and the cross beam 20 are integrally connected is described. Can also be applied.
[0019]
【The invention's effect】
According to the first aspect of the present invention, a pressing member fixed to both inner masts is used as a load stabilizer, and the load lifted by a fork is pressed against the pressing member to clamp the load. Since a hydraulic cylinder or the like is not required for the clamping, the structure is simple and the manufacturing cost is low. Further, since the pressing member is lightweight and its weight is not directly applied to the lift bracket, a heavy load can be lifted by a fork compared to the conventional case, and the conveyance efficiency is high.
[0020]
According to the first aspect of the invention, the free lift clearance can be used to securely clamp the load with an appropriate clamping force by the fork and the pressing plate so as to prevent the load from collapsing to a predetermined position.
[Brief description of the drawings]
FIG. 1 is a side view showing a forklift with a free lift type load stabilizer according to an embodiment of the present invention.
FIG. 2 is a plan view of the same part cut out.
FIG. 3 is a perspective view of the load stabilizer.
FIG. 4 is a side view of a main part showing a state where the free lift clearance is set to a maximum width.
FIGS. 5A to 5C are side views of main parts showing a package transport procedure. FIGS.
FIG. 6 is a side view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Car body 2 Outer mast 3 Inner mast 4 Fork 5 Lift bracket 6 Chain mechanism 6b Sprocket wheel 7 Lift cylinder 8 Load stabilizer 12 Holding member 12a Holding plate 12b Bracket 12c Reinforcement girder 15 Base plate 16 Screw hole 17 Bolt 19 Lifting member 20 Horizontal girder P Pallet W Luggage H Distance between the lowest fork and the holding plate h Height of the load lifted by the fork C Free lift clearance

Claims (1)

A lift bracket with a fork is disposed on a pair of inner masts that can be moved up and down along a pair of outer masts on the vehicle body, and the lift bracket with fork is moved up and down through a chain mechanism and both inner masts are directly moved. lift cylinder for elevating a is provided, the sprocket load stabilizer consisting of pressing the pressing member an upper surface of該荷material when lifted luggage loaded on the fork said is fixed to both inner mast and said chain mechanism A free lift clearance is formed between an elevating member that supports the wheel rotatably and is raised and lowered by a lift cylinder, and a transverse girder constructed between the upper ends of the inner masts. Until the fork is raised and pressed against the horizontal beam Load stabilizer with a forklift, wherein a distance obtained by subtracting the height of the cargo lifting by the forks from the interval is set in the range of the free lift clearance between the fork and the pressing plate of the lowermost state.

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