JP3087066B1 - Lift truck - Google Patents

Abstract

[PROBLEMS] To easily perform operations such as packing at the time of shipment and transportation or carrying to a work place. SOLUTION: A mast (2) provided with a loading platform (1) so as to be movable up and down, front and rear wheels (3) and (6), a lift cylinder (13) for lifting and lowering the loading platform (1), and a lift pump (19).
Front and rear wheels (3) and (6)
A mast base (12) is rotatably connected to a mast mounting base (5) via a fulcrum shaft (23) so as to be able to rotate back and forth, and the mast (2), the lift cylinder (13), and the lift pump (19) are connected to the mast base (5). (12), a mast locking body (24) for locking the mast base (12) to the mast mounting base (5) at the mast (2) standing position or the front falling position, and the mast mounting base (5). The left and right widths of the loading surface (25) of the loading platform (1) are formed to be larger than the left and right mounting widths of the stand fork (4) for attaching the front wheel (3) by connecting the front fork (3).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift truck for loading, lifting, and transporting a load on a carrier.

[0002]

Conventionally, there is provided a loading platform mounted on a mast so as to be able to move up and down, and front and rear wheels for supporting the mast, and a technique of loading and unloading cargo by raising the loading platform by a hydraulic lift cylinder. There is. The prior art,
When the mast mounting base for mounting the front and rear wheels and the mast are made of a lightweight alloy material, the weight of the mast and the mast mounting base can be reduced to reduce the weight of the mast and the mast mounting base to such an extent that it can be carried around. And there is a problem that it is not easy to carry out packing or shipping to a work place at the time of shipping or transportation or storage when not in use.

[0003]

In order to solve the problems] However, the present invention is, luggage
Loading platform and a pair of left and right for loading and unloading the loading platform
Mast and a pair of left and right wheels that support a pair of left and right front wheels.
Tand fork, aluminum alloy hollow pipe
Rear wheel fixing part and stand for mounting and mounting rear wheel
Mast attachment to the stand fork fixing part at the rear end of the fork
Integrally formed on the table by forming aluminum alloy casting
The mast, lift cylinder and lift pump.
Provided on the strike base, the mass is mounted on the mast mounting base via the fulcrum shaft.
The base is connected rotatably back and forth,
Remove the mast lock that engages with the lock groove on the base.
Mast base is slidably inserted into the long hole of the mounting base.
The mast locking body that is elastically engaged with the groove by a spring comes off
A stopper is provided on the mast base to prevent the weight of the mast base from being reduced.
With the mast falling forward, the mast and the stand fork can be compactly folded close to each other across the loading surface of the loading platform, and work such as packing or carrying to the work place during shipping and transportation can be performed without removing the mast or the loading platform. obtained easily performed, also resulting performed easily and storage when not in use in a narrow space, when and improve handling operability obtain aim to facilitate
In both cases, simplification of the mast hoisting operation can be easily performed, and
It is easy to prevent the mast lock from coming off and
Easily eliminate problems such as mast falling down due to operation
It is capable of.

In addition, the carrier is mounted on the mast so as to be able to move up and down.
Provide a carrier engaging body on the lift frame and
The notch for engaging the carrier engaging body by
The mast is folded down
The loading platform can be locked and fixed by the folding operation,
Easily eliminates the problem of the carrier moving to the top of the mast
Mounting structure and notch formation
The structure can be simplified and the manufacturing cost can be easily reduced .

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is an overall side view, FIG. 2 is a front view thereof,
FIG. 3 is a plan view of the same, and as shown in FIGS. 4 to 8, a loading platform (1) for loading luggage, a pair of left and right masts (2) for mounting the loading platform (1) so as to be movable up and down, and a pair of left and right masts. A pair of left and right stand forks (4) that support the front wheel (3)
Is formed by a hollow pipe made of an aluminum alloy, and a mast mounting base (5) for erecting the mast (2) substantially vertically is formed by molding of an aluminum alloy casting. Rear wheel (6)
To the mast mounting base (5).

Further, a handle (7) is fixed to the rear surface of the mast (2), and the upper ends of the pair of left and right masts (2) are connected with screws by a top plate (8), and as shown in FIG. Attach (1) to the lift frame (9),
A pair of left and right synthetic resin vertical lifting rollers (10) are rotatably supported on the rear end side of the lift frame (9), and the lifting rollers (10) are rolled in grooves (11) formed in the mast (2). Freely fit, two sets of four left and right rollers (10)
The loading platform (1) is mounted between the left and right masts (2) so as to be able to move up and down.

Further, a mast base (12) is fixed to the lower end of the mast (2), and a single-acting hydraulic lift cylinder (13) is provided between the left and right masts (2) substantially at the center of the upper surface of the mast base (12). ) Is erected and fixed, and the cylinder (1) is fixed.
A pulley (15) is attached to the upper end of the piston (14) of 3), and the middle of a load wire (16) for fixing both ends to the carrier (1) and the cylinder (13) is wrapped around the pulley (15) to be stretched. Pulley (15) by entering / exiting 14)
Is moved up and down to raise and lower the loading platform (1). Further, both ends of the beam frame are fixed between the left and right masts (2), and the upper end side of the cylinder (13) is fixed to the beam frame by bolting.

Further, an oil passage base (18) fixed to the mast base (12) by bolts, a hydraulic plunger pump type lift pump (19) fixed to the oil passage base (18), and a pump handle (stepping operation). 2
0), and a carrier (1) which is opened and closed by rotating the knob lever (21), a lowering pressure relief valve, a suction valve, and a relief valve are built in the oil passage base (18), and a handle ( The lift pump (19) is driven by the stepping operation of (20), and the oil passage base (1) is driven.
8) The lift cylinder (13) to be erected and fixed on the elevator is operated to raise the loading platform (1), while the knob lever (2) is raised.
1) The pressure relief valve is opened by rotating operation, the oil in the lift cylinder (13) is returned to the tank, and the loading platform (1) is lowered.

Further, as shown in FIG. 4, a rear wheel fixing portion (22a) for mounting a rear wheel (6) and a stand fork (4) for providing a front wheel (3) on a front end side are connected to a rear fork fixing. Part (22b), mast mounting (5)
The mast mounting base (5) is integrally formed by molding an aluminum alloy casting into each of the fixed parts (22a) (2).
2b) The rear wheel (6) and the stand fork (4) are bolted and fixed to the mast (2) and the mast mount (5).
The stand fork (4) is made of a lightweight alloy such as aluminum, and the connection structure of each part is simplified and the number of connection bolts is reduced to improve assembly workability and reduce manufacturing costs. The mast (2) and the mast mounting base (5) are formed of a lightweight material such as an aluminum alloy or a synthetic resin without the need for fixing by using the mast (2) and the mast mounting base (5). The lift pump (19) raises the loading platform (1), and the lift pump (19) and a hydraulic operating mechanism are formed by a lightweight material such as an aluminum alloy or a synthetic resin, and a hydraulic drive mechanism for lifting the loading platform (1) is provided. Lightweight, easy to carry (about 2
(0 kilograms) to reduce its own weight and reduce restrictions on use in narrow places to improve handling operability.

Further, a mast (2) provided with a loading platform (1) so as to be movable up and down, front and rear wheels (3) and (6), a lift cylinder (13) for lifting and lowering the loading platform (1), and a lift pump (1).
In the lift truck provided with 9), the front and rear wheels (3)
A mast base (12) is rotatably connected to a mast mounting base (5) provided with (6) via a fulcrum shaft (23) so as to be rotatable back and forth, and a mast (2), a lift cylinder (13), and a lift pump (19). Is provided on the mast base (12), and the mast (2) is provided with a round bar-shaped mast locking body (24) for locking the mast base (12) to the mast mounting base (5) at the standing position or the front falling position. The mounting surface (2) of the loading platform (1) is larger than the left and right mounting widths of the stand fork (4) for mounting the front wheel (3) connected to the mast mounting platform (5).
5) The left and right widths are formed large. And, by the forward fall of the mast (2), the loading surface (25) of the carrier (1)
The mast (2) and the stand fork (4) are placed in close proximity to each other and folded compactly, and without removing the mast (2) or the carrier (1), they can be packed for shipping or carried to a work place. And storage when not in use in a narrow space to improve handling operability.

Further, the mast stopper (24), which is engaged with and disengaged from the mast base (12), is connected to the elongated hole (2) of the mast mount (5).
6) is slidably inserted into the mast base (12), and the mast locking body (24) is elastically engaged with the locking groove (27) of the mast base (12) by the spring (28) to simplify the mast (2) undulating operation. And prevents the mast locking body from being detached and lost, and prevents the mast locking body (24) from being detached from the mast base (12) against the spring (28) to be elastically engaged. Connect the hook type stopper (29) to the mast base (1
A pair of left and right stoppers (29) is provided on the operation rod (31) so that the mast (2) can be rotatably mounted on the support rod (30) through a support shaft (30) to prevent the mast (2) from falling down due to erroneous operation.
The operator holds the mast (2) with one hand, pushes up the operating rod (31) with the finger of the other hand to release the stopper (29), and releases the stopper (29). 24) is pressed down against the spring (28) to disengage it from the locking groove (27), and the mast (2) is operated to fall forward. The release lever (32) is rotatably supported on the operation rod (31), one end of the release lever (32) is brought into contact with the mast locking body (24), and the release lever (32) is pulled up. After the stopper (29) is released, the mast stopper (24) may be pushed down by the contact of the lever (32).

[0012] Further, a round pipe-shaped carrier engaging member (33) for locking the carrier (1) to the mast mounting platform (5) by the forward fall of the mast (2) is provided on the lift frame (9).
The luggage carrier (1) is locked and fixed by an operation in which the mast (2) is folded forward and folded, thereby eliminating the trouble that the luggage carrier (1) moves to the upper end side of the mast (2) in the forward lying state, and the like.
A carrier engaging body (33) is provided on the carrier (1) via a lift frame (9), and a notch (34) for engaging the carrier engaging body (33) by the forward fall of the mast (2) is provided on the mast mounting base (5). ), And has a functional configuration in which the left and right widths of the loading platform (1) are larger than the mast mounting platform (5), and simplification and manufacturing cost of the loading platform engaging body (33) mounting structure and the notch (34) forming structure. Reduction is performed.

Further, a guide inclined surface (35) is formed between the notch (34) and the front surface of the mast mount (5), and when the mast (2) is turned forward, the lower surface of the mounting surface (25) is a stand fork ( 4) The lift frame (9) falls forward around the support shaft (36) that contacts the upper surface and connects the carrier (1) to the lift frame (9), and the guide slope (35).
The carrier engaging body (33) slides into the notch (34) and engages with the notch (34), and the carrier engaging body (33) is automatically engaged with the notch (34) simply by lowering the mast (2) forward, and The loading platform (1) is connected to the mounting platform (5). Also, when the mast (2) stands up, the loading platform (1) is lowered to the lowest position and the loading surface (2)
5) When the lower surface is brought close to the upper surface of the stand fork (4) and the mast (2) is folded forward, the mast locking body (24) becomes the arc-shaped lower end surface (3) of the mast base (12).
It is moved by the guide of 8) and is supported by the spring (28) against the front end (37) of the mast base (12), and the mast (2) is fixed to the mast mounting base (5) in the lying posture.

As shown in FIGS. 9 to 11, the mast (2) is folded down by laying forward and packed for shipment, or loaded on a truck bed or the like and carried to a work place, as shown in FIG. Mast (2) with handle (7)
Lift the upper end side, move only the rear wheel (6) while touching the ground, move it around, and attach the handle (7) to the hanging hook that is fixed to the vertical wall or ceiling of a storage place such as a storage room or a box-type truck bed. By hooking and storing and forming a space on the lower floor surface, cleaning can be simplified or other luggage can be stored.

[0015]

As is apparent from the above embodiments, the present invention provides a loading platform (1) on which a load is placed, and the loading platform (1) can be moved up and down.
And a pair of left and right masts (2)
A pair of left and right stand forks that support the wheel (3)
(4) is replaced by a hollow pipe made of aluminum alloy
A rear wheel fixing portion (22a) for forming and mounting the rear wheel (6)
Stand fork (4) Stand fork fixing part at the rear end
(22b) and aluminum mast mounting base (5)
The mast (2) and
And lift cylinder (13) and lift pump (19)
Provided on the mast base (12) and supported on the mast mount (5)
Turning the mast base (12) back and forth through the point axis (23)
Mast base (12)
The mast locking body (24) to be engaged with and
It is slidably inserted into the long hole (26) of the strike mount (5).
The spring (2) into the locking groove (27) of the mast base (12).
8), the mast stopper (24) to be resiliently engaged is released.
Mast base with stopper (29) to prevent removal
(12), which can be easily carried around
The weight of the mast (2)
The mast (2) and the stand fork (4) can be folded close to each other with the mounting surface (25) of the carrier (1) interposed therebetween, and can be folded compactly without removing the mast (2) or the carrier (1). Work such as packing at the time of shipping and transportation or carrying to the work place can be easily performed, and storage when not in use in a narrow space can be easily performed, and improvement of handling operability can be easily achieved. While being able to
Mast (2) The undulation operation can be simplified easily.
And easy removal and loss of the mast lock (24)
Can prevent the mast (2) from falling down due to erroneous operation.
The defect can be easily eliminated .

Further , the loading platform (25) is moved up and down on the mast (2).
The carrier engaging body (3) is attached to the lift frame (9 )
3) is provided, and the carrier
Mast attachment of notch (34) for engaging united (33)
The mast (2) is formed on the base (5),
The loading platform (1) can be locked and fixed by the
The bed (1) moves to the upper end side of the mast (2) in the lying state
Troubles can be easily eliminated, and
Engaging body (33) mounting structure and notch (34) forming structure
The structure can be simplified and the manufacturing cost can be easily reduced .

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is an enlarged side view.

FIG. 5 is an enlarged view of the same part.

FIG. 6 is a sectional view of the same.

FIG. 7 is an enlarged plan view.

FIG. 8 is an enlarged view of the same part.

FIG. 9 is a side view of the folding;

FIG. 10 is an enlarged view of FIG.

FIG. 11 is an explanatory view of carrying.

[Explanation of symbols]

 (1) Loading bed (2) Mast (3) Front wheel (4) Stand fork (5) Mast mounting base (6) Rear wheel (12) Mast base (13) Lift cylinder (19) Lift pump (23) Support shaft (24) ) Mast stopper (25) Loading surface of carrier (26) Slot (28) Spring (29) Stopper (33) Carrier engaging body (34) Notch

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

Claims (2)

(57) [Claims] 1. A loading platform (1) for loading packages, and a loading platform (1).
And a pair of left and right masts (2) that allow the
A pair of left and right stand supports the pair of right front wheels (3)
Oak (4) into aluminum alloy hollow pipe
Therefore, the rear wheel fixing portion (22) formed and mounted with the rear wheel (6)
a) and stand fork (4) rear stand fork
Fixing part (22b) and mast mounting base (5)
Formed by forming a metal alloy casting
(2) and lift cylinder (13) and lift pump
(19) is provided on the mast base (12), and the mast mounting base is provided.
(5) Mast base (12) via fulcrum shaft (23)
And the mast base
Mast locking body for engaging and disengaging with the locking groove (27) of (12)
(24) slides into the long hole (26) of the mast mount (5)
The mast base (12) is inserted freely into the locking groove (2).
7) Mast locking to engage elastically with a spring (28)
A stopper (29) for preventing the body (24) from coming off
A lift truck provided on a mast base (12) . 2. The loading platform (25) can be freely moved up and down on the mast (2).
Lifting frame (9) to be attached to the carrier engaging body (33)
And the carrier engaging body by the forward fall of the mast.
Notch (34) for engaging (33) with mast mount
The lift truck according to claim 1, wherein the lift truck is formed in (5) .