JP3328391B2 - Lifter and mounting method of lifter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifter such as a forklift and, more particularly, to a lifter which can be mounted on a stepped surface such as a truck bed by itself and a mounting method thereof.

[0002]

2. Description of the Related Art A forklift is used to load goods on a truck bed or the like. When a product is to be unloaded from a truck bed at a destination, if there is no forklift at the destination, a large number of workers can take one product. Each of them has to be unloaded from the truck bed and transported to a predetermined place, which imposes heavy labor on the worker and reduces work efficiency.

[0003] Therefore, a self-flying type forklift that gets on and off a carrier such as a truck by its own driving force is known. For example, as disclosed in Japanese Patent Publication No. 58-3959, the upper end of an auxiliary leg body having a leg attached to a fork supporting a wheel and a wheel attached to a lower end so as to be capable of falling down is supported so as to be able to move up and down. When a forklift is mounted on a truck bed, the forklift is lifted, then the auxiliary leg is fixed to the fork support frame, and the fork is lowered. By raising the lift body including the support column with the auxiliary leg supporting the entire forklift, and placing the lift body on the bed when the lift body is raised to a position slightly higher than the bed, There has been known one in which an auxiliary leg is raised by operating in a raising direction.

Further, as disclosed in Japanese Utility Model Publication No. Sho 56-32480, a telescopic rod is provided at the front side of the lift main body so as to expand and contract with a cylinder device. When a forklift is mounted on a truck bed by providing a leg having wheels at the lower end, the telescopic rod is extended to bring the wheels of the leg into contact with the road surface, and the telescopic rod is further extended. By lifting the lift body to a position where the lift body is slightly higher than the carrier, the lift body is placed on the carrier using the wheels of the legs of the telescopic rod, and then the telescopic rod is contracted. Things are also known.

[0005]

In the above-mentioned conventional self-lifting type forklift, an auxiliary leg provided on the front side of the lift main body or a telescopic rod having the leg, the so-called one-side only piece of the entire lift main body is provided. In order to raise the lift body while holding it, an auxiliary leg or a telescopic rod having legs is required to have high strength and rigidity. As a result, the forklift becomes heavy. In addition, when the lift body is raised, the center of gravity is increased, and since the structure is supported cantilevered by an auxiliary leg or the like, work stability is poor. When the road surface is inclined, the work becomes more unstable.

[0006]

In order to solve the above problems, a lifter according to the present invention comprises a first auxiliary leg attached to a first auxiliary leg.
The auxiliary wheels can be brought into contact with a stepped surface such as a truck bed on the rear side of the lifter main body, and the second auxiliary wheels attached to the second auxiliary legs can be brought into contact with the ground on the front side of the lifter main body. One end of the second auxiliary leg is provided so as to be selectively fixed to the fork or the fork support frame.

[0007] A method of mounting a lifter according to the present invention is as follows.
The first auxiliary wheel of the first auxiliary leg is brought into contact with a stepped surface such as a bed of a truck on the rear side of the lifter body, and one end of the second auxiliary leg is selectively fixed to a fork or a fork support frame. After the auxiliary wheel is brought into contact with the ground in front of the lifter main body, the lifter main body is raised to move the lifter main body on a stepped surface.

[0008]

The second auxiliary wheel supports the rear side of the lifter main body with the first auxiliary leg having the first auxiliary wheel abutting on a stepped surface such as a loading platform, and the front side of the lifter main body abuts on the road surface. By supporting the lifter main body from the front and back with the second auxiliary legs having the above, the lifter main body can be raised in a stable state, and the weight of the auxiliary legs can be reduced.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a side view of a forklift as a lifter device according to the present invention, FIG. 2 is a front view of the forklift viewed from the rear side, FIG. 3 is a rear view of the forklift viewed from the front side, and FIGS. FIG. 12 is a side view for explaining a procedure for mounting the lifter main body on a truck bed.

In this forklift, two columns 3 (right and left in the direction perpendicular to the paper of FIG. 1) are provided upright at the rear end of a frame 2 of a lifter body 1 on which a power device such as an engine is mounted. The frame 4 is held movably up and down, and a fork 5 is pivotally attached to the lower end of the fork support frame 4 so that it can be folded up and down. The rear end of the frame 2 has a pair of left and right outriggers 7 rearwardly pivotally attached to a rear end thereof by a support shaft member 8 so as to be vertically foldable and lockable by a lock lever 9.

A drive wheel 10 which is a drive wheel rotated by an engine is provided at a front portion of the frame 2 of the lifter main body 1, and the drive wheel 10 is steered by a steering tongue 11. A load wheel 12 is attached to a tip end of the outrigger 7, and a wheel 13 serving as a load wheel when the outrigger 7 is folded is attached to a front end of the outrigger 7.

A first auxiliary leg 15 is pivotally mounted on both sides of the fork support frame 4 so as to be stowable, and a first auxiliary wheel 16 is attached to a distal end of the first auxiliary leg 15. On both sides of the frame 4, the second auxiliary leg connecting bracket 1
7 is attached.

Further, second auxiliary legs 18 are provided on both sides of the lifter main body 1, and second auxiliary wheels 19 are attached to the distal ends of the second auxiliary legs 18. This second auxiliary leg 18
Is an arm 20 which can be connected to the bracket 17 at one end, and an L-shaped leg 23 which is rotatably supported on the arm 20 by a support shaft 21 and can be connected by a pin inserted into a pin hole 22.
And a part of the L-shaped leg 23 is a slide pipe 24
The inner pipe 24a of the slide pipe 24
The second auxiliary wheel 19 is attached to the front end of the base, and can be fixed in an extended state by a pin inserted into the pin hole 25. In addition to the fork support frame 4, the first auxiliary leg 15 is not limited to the fork 5 itself or the arm 20 of the second auxiliary leg 18.
You may make it attach to.

When the forklift constructed as described above is used, the fork 5 is extended and the outrigger 7 is extended as shown in FIG. The drive wheel 10 is driven by the engine, and the steering tongue 11
Carry the luggage while steering with and load and unload the required luggage.

When the forklift is to be mounted on a truck bed, the fork 5 is folded from the normal use state shown in FIG. 1 as shown in FIG. 4, and the first auxiliary leg 15 is taken out to obtain the first auxiliary leg. After taking out the wheel 16,
As shown in FIG. 5, the fork support frame 4 is lowered, and the first auxiliary wheels 16 of the first auxiliary legs 15 are brought into contact with the road surface, so that the load wheel 12 of the outrigger 7 is floated from the road surface.

Next, as shown in FIG.
The pin inserted into the pin hole 20a of the arm 20 through the pin hole 22 of the L-shaped leg 23 of FIG.
3 is taken out and the outrigger 7 is folded. Then, as shown in FIG. 7, the fork 5 is raised to a position slightly higher than the truck bed, and the L-shaped legs 23
The pin is inserted into the pin hole 20b of the arm 20 through the pin hole 22 of the arm 20, and the L-shaped leg 23 and the arm 20 are fixed. At this time, the wheel 13 at the front end of the outrigger 7 contacts the road surface.

Then, one end of an arm 20 forming the second auxiliary leg 18 is connected to the bracket 17 fixed to the fork support frame 4. To connect, first, as shown in FIG. 8A, the height position of the bracket 17 and the arm 20 are adjusted, and then, as shown in FIG.
1 is loosened, the coupler 30 is extended to the arm 20 side, and the screw 3
Tighten 1 to connect them.

Thereafter, as shown in FIG. 9, the lifter body 1 is moved to position the first auxiliary wheels 16 on the truck bed P, and the forks 5 are lowered, so that the first auxiliary wheels 16 are moved to the truck bed. P and the L of the second auxiliary leg 18
The slide pipe 24 of the leg 23 is extended to bring the second auxiliary wheel 19 into contact with the road surface, and a pin is inserted into the pin hole 25 to fix the slide pipe 24 to a required length.

Thereafter, the fork support frame 4 cannot be lowered by applying a driving force for lowering the fork 5, so that the lifter main body 1 relatively rises as shown in FIG. Raise to a slightly higher position. At this time, the rear side of the lifter main body 1 is supported by the first auxiliary legs 15, and the front side of the lifter main body 1 is supported by the second auxiliary legs 18, so that the center of gravity of the lifter main body 1 is 15 and the second auxiliary leg 18, and the point of application of the force of the first auxiliary leg 15 is on the bed P of the truck, so that the work stability when the lifter main body 1 is raised is improved.

Then, as shown in FIG.
After moving the lifter main body 1 backward using the second auxiliary wheel 19 and the loading platform P, the fork 5 is raised and the lifter main body 1 is lowered onto the loading platform P as shown in FIG. And the first auxiliary leg 15 and the second auxiliary leg 18 are returned to the original state. When the forklift is lowered from the bed P of the truck, the procedure may be reversed.

FIG. 13 is a view showing another embodiment. In this embodiment, the first auxiliary leg 15 is detachably attached to the second auxiliary leg 18. Then, when placing on a carrier or the like, first, the L-shaped leg 23 is rotated about the support shaft 21 as shown in FIG. At this time, the first auxiliary leg 15 remains on the arm 20. Next, the distal end of the arm 20 is coupled to the bracket 17 fixed to the fork support frame 4 via the coupler 30 and the first auxiliary leg 15 is tilted backward to position the first auxiliary wheel 16 on the rear side of the lifter body. .

[0022]

According to the present invention as described above,
The first abuts the rear side of the lifter body on the uneven surface such as a loading platform.
The lifter body is supported by the first auxiliary leg body having the auxiliary wheel, and the front side of the lifter body is supported by the second auxiliary leg body having the second auxiliary wheel abutting on the road surface. Since the lifter is supported and raised, the lifter body can be raised in a stable state, and the weight of the auxiliary leg can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a forklift serving as a lifter device according to the present invention.

FIG. 2 is a front view of the forklift as viewed from a rear side.

FIG. 3 is a rear view of the forklift as viewed from a front side.

FIG. 4 is a side view for explaining a procedure for mounting the lifter main body on a truck bed.

FIG. 5 is a side view for explaining a procedure for mounting the lifter body on a truck bed;

FIG. 6 is a side view for explaining a procedure for mounting the lifter body on a truck bed;

FIG. 7 is a side view for explaining a procedure for mounting the lifter body on a truck bed.

8A is a perspective view showing a state before an arm of a second auxiliary leg is connected to a bracket on a support frame side, and FIG. 8B is a perspective view showing a state where the arm is connected;

FIG. 9 is a side view for explaining a procedure for mounting the lifter main body on a truck bed.

FIG. 10 is a side view for explaining a procedure for mounting the lifter body on a truck bed.

FIG. 11 is a side view for explaining a procedure of mounting the lifter main body on a truck bed.

FIG. 12 is a side view for explaining a procedure for mounting the lifter main body on a truck bed;

FIG. 13 is a side view of a forklift showing another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lifter main body, 3 ... Prop, 4 ... Fork support, 5 ...
Fork, 7 ... Outrigger, 10 ... Drive wheel, 12 ... Road wheel, 15 ... First auxiliary leg, 16 ...
1st auxiliary wheel, 17 ... second auxiliary leg connecting bracket, 18
... second auxiliary leg, 19 ... second auxiliary wheel, 20 ... arm, 23
... L-shaped legs.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B66F 9/06

Claims (2)

(57) [Claims] 1. A lifter having a fork supported by a column which is provided upright on a rear side of a self-propelled lifter main body, the fork supported by the fork supported by the fork supported frame. A first auxiliary wheel, which is attached to a stepped surface of a loading platform or the like at a rear side of the lifter main body so as to be able to contact the rear side
An auxiliary leg, and a second auxiliary leg to which a second auxiliary wheel that can be brought into contact with the ground at the front side of the lifter main body is provided, and the first auxiliary leg and the second auxiliary leg are the fork, the fork support frame, or the fork support frame. A lifter characterized in that it can be selectively fixed to a member that moves up and down integrally with the lifter. 2. A fork supporting frame is supported on a support standing upright on the rear side of a self-propelled lifter body so as to be able to move up and down. In the mounting method for mounting on a surface, the first auxiliary wheel of a first auxiliary leg supported by the fork, the fork support frame, or a member that moves up and down integrally therewith is brought into contact with the stepped surface on the rear side of the lifter body. The second support wheel of the second auxiliary leg supported by the fork, the fork support frame, or a member that moves up and down integrally therewith is brought into contact with the ground at the front side of the lifter main body. Lifting the lifter main body and moving the lifter main body on the stepped surface together with the lifter main body.