JPH07257893A - Lift device for construction works - Google Patents

Abstract

PURPOSE:To transport the load safely, certainly, and effectively without causing the lift to be designed in a large size. CONSTITUTION:A fork dolly 21 is mounted in a lift 13 and is arranged as mobile by itself over the distance from the lift 13 to the floor 22 of the storey under construction, and provision of fork lift for each storey is eliminated so that the equipment costs and the weight are reduced. The load width of the rear body of a fork 25 is made adjustable so that the load is supported certainly regardless of the shape and size, and the transportation of the load can be made safely, certainly, and effectively without causing the lift 13 to be designed in a large size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction lift device used for material transportation at a construction site such as a building.

[0002]

2. Description of the Related Art In recent years, at a building construction site or the like, automation of material transfer work from the ground to each floor site of the building has been attempted. The conventional material transportation state will be described with reference to FIG. FIG. 5 shows a side view of a conventional construction lift device.

As shown in the figure, the space 2 of the building 1 under construction
A lift 3 is provided to be movable up and down, and the lift 3 is lifted and lowered by a hoisting rope 4 of a winch (not shown). Each building 1
A forklift 6 is disposed on the floor 5 of each floor, and the forklift 6 is provided with traveling wheels 7 and traverse wheels 8. In addition, the forklift 6 has a telescopic fork 9
Is provided, and the pallet 10 is picked up by the telescopic fork 9.

In the above-mentioned construction lift device, the pallet 10 containing the material on the ground is lifted to the construction floor by the lift 3, and the forklift 6 arranged on that floor is traversed and placed in the lift 3. The pallet 10 is picked up by the telescopic fork 9, the forklift 6 is retracted onto the floor 5 of the building 1, and the pallet 10 is run and conveyed to a predetermined position.
As described above, the material on the ground is transported to the predetermined position on the construction floor.

[0005]

In the conventional construction lift device, for example, a standard pallet 10 has a loaded weight of about 1.3 tons and a forklift 6 has a dead weight of 0.8.
When a ton-type one is used, when the forklift 6 is put into the lift 3 and the pallet 10 is picked up, a load of 2 tons or more is applied to the lift 3. However, since the lift 3 for construction generally used has a maximum load weight of less than 1.5 tons, it is necessary to reduce the weight of the material loaded on the pallet 10 before use, which is inefficient. Met. In order to load materials up to the load weight limit of the pallet 10 and improve efficiency, it is necessary to enlarge the lift 3 and the equipment cost will increase.
Further, since all of the forklifts 6 arranged on each floor of the construction are required to be capable of traveling laterally, it is inevitable that the equipment cost rises. Further, in the conventional construction lift device, since the loading platform of the telescopic fork 9 on which the pallet 10 is loaded has a constant width dimension, when loading a long slender load in the width direction or a load having a decentered center of gravity, the loaded state is There is a possibility that the forklift 6 may fall down or the load may drop during transportation due to instability.

[0006]

The structure of the present invention for solving the above-mentioned problems comprises a lift that can be raised and lowered between the ground and the site of a construction structure, and a fork truck provided on the lift. The trolley is characterized by comprising a trolley body that can be self-propelled between a lift and a site, and a fork that is provided on the trolley body to support a load on a trolley to ascend and descend while the loading width of the trolley is adjustable To do.

[0007]

[Operation] When transporting a load from the ground to the site floor, adjust the load width of the fork carrier according to the condition of the load, move the trolley body in the lift to the load position on the ground, and stabilize the load with the fork. After supporting it in this condition, the bogie body is returned to the inside of the lift, and the lift is raised to the floor of the site. The trolley body supporting the load is transported from the lift to the site, and after the transportation, the trolley body is returned to the inside of the lift. When transporting a load from the site floor to the ground, the reverse operation is performed.

[0008]

1 is a side view of a construction lift device according to an embodiment of the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is a line III-III in FIG. As seen from the arrow, a perspective view of the fork is shown in FIG.

As shown in FIGS. 1 to 3, a lift 13 is provided in a space 12 of a building 11 under construction so as to be vertically movable.
The lift 13 is lifted and lowered by a winch hoisting rope 14 (not shown). The lift 13 is supported by the connecting portion 15 of the hoisting rope 14, and the connecting portion 15 is provided with a plurality of rollers 17 that engage with the guide rails 16 provided along the hoisting rope 14. Through the guide rail 16
Go up and down.

A fork truck 21 is provided in the lift 13. The fork truck 21 is a vehicle body portion 23 as a truck body that is capable of self-propelled over the lift 13 and the floor 22 at the site.
And a fork 25 that is vertically movable in the vehicle body portion 23 and that loads and places a pallet 24 as a load.

The fork truck 2 is mounted on the floor 26 of the lift 13.
A guide rail 27 for guiding the forward / backward movement of No. 1 is laid, and is operated by a hydraulic cylinder 28 on the front end side of the floor 26 so that the fork truck 21 travels across the gap between the tip of the lift 13 and the building 11. A tread 29 that assists the vehicle is provided so that it can be tilted up and down. 2, reference numeral 30 is a guide rail connected to the guide rail 27, and 31 is a stopper for restricting the backward limit position of the fork truck 21.

The fork truck 21 is provided with a fork 25 supported by a vehicle body portion 23 and a cross arm 32, and the fork 25 is supported by a hydraulic cylinder 34.
It goes up and down along 3. A plurality of wheels 35 are provided below the vehicle body 23, and the wheels 35 are driven by a hydraulic motor 36. A roller 37 that engages with the guide rail 27 is provided below the vehicle body portion 23.

The fork truck 21 has a fork 25 by expanding and contracting the cross arm 32 with a hydraulic cylinder 34.
Is moved up and down, and the fork 25 is moved up and down to load and place the pallets 24. Also, the hydraulic motor 3
By driving the wheels 35 by 6, the fork truck 21 moves forward and backward along the guide rails 27 in the lift 13, and moves forward and backward on a track 22 on the floor 22 at the site of each floor.

The fork 25 will be described in detail. As shown in FIG. 4, a lateral beam portion 41 is provided at the lower end of the vehicle body portion 23, and a pair of guide columns 42 are erected on the lateral beam portion 41. An elevating part 43 is supported by the pair of guide columns 42 so as to be able to elevate and lower, and the elevating part 43 is provided with a guide beam 44 parallel to the lateral beam part 41. Auxiliary columns 45 parallel to the guide columns 42 are provided on the elevating part 43 between the pair of guide columns 42, and the bases 47 of the loading platform 46 are respectively arranged on the guide beams 44 with the auxiliary columns 45 interposed therebetween via the guide grooves 47a. Slidably fitted. That is, the cargo bed 46 is movably supported along the guide beams 44, and the cargo width is adjusted by moving the pair of cargo beds 46.

A screw rod 48 parallel to the guide beam 44 is rotatably supported by the elevating part 43 with an auxiliary column 45 interposed therebetween, and a base part 47 of a loading platform 46 is screwed onto the screw rod 48. A handle (not shown) is attached to the end 48a of the screw rod 48, and the screw rod 48 is rotated by the handle to move the pair of loading platforms 46 along the guide beams 44, and the loading width L of the loading platform 46 is adjusted. . The screw rod 48 may be automatically rotated using an electric motor or the like. The platform 46 is supported by the cross arm 32, and the cross arm 32 is attached to the cross beam portion 4.
1 is movably supported.

The raising / lowering operation of the fork 25 and the traveling operation of the fork truck 21 are controlled by a control device 39 via an electric wire 38, and are all automatically executed in accordance with a preset program or an operator's instruction.

Next, a procedure for transporting the pallet 24 by the above-described construction lift device will be described.

When loading the pallet 24, the loading width L of the loading platform 46 of the fork 25 is adjusted according to the size of the load, particularly the size of the load in the width direction. For example, in the case of a load elongated in the width direction, the load bar 46 is moved along the guide beam 44 by rotating the screw rod 48 to widen the load width L. On the contrary, when the load is short in the width direction, the load bar L is narrowed by rotating the screw rod 48 in the opposite direction to move the load platform 46 in the opposite direction along the guide beam 44. By adjusting the load width L, loads having different shapes and sizes can be safely transported by the single fork truck 21. After adjusting the load width L according to the load, the pallet 24 is transported in the following procedure.

For example, when a pallet 24 containing materials on the ground floor is raised and conveyed to a predetermined floor, the pallet 24 is placed by a separate means in the vicinity of the entrance of the lift 13 on the ground floor or at a fixed position a little away. Take the lift 13 to the ground floor,
The tread 29 is tilted down by driving the hydraulic cylinder 28, and the tread 2
9 is hung over the gap between the lift 13 and the building 11.

Next, the wheels 35 are driven by the hydraulic motor 36 to advance the fork truck 21 (at this time, the fork 25 of the fork truck 21 is lowered and ready for loading). The fork truck 21 advances in the lift 13 along the guide rails 27 via the guide rollers 37, crosses the treads 29 and goes straight on the track 22 on the ground floor toward the pallet 24, and moves straight on the forks 25. It stops at the position where it is inserted in the lower part of the pallet 24.

The fork 2 is driven by driving the hydraulic cylinder 34.
5 is lifted to lift the pallet 24, and in this state, the fork truck is retracted. The fork truck 21 travels on a floor 22 without a track, and when it comes into the lift 13 via a tread 29, a guide roller 37 engages with a guide rail 27,
It runs along the guide rail 27 and stops at the position of the stopper 31.

After erecting the footboard 29, the lift 13 is raised. When the lift 13 reaches the predetermined floor, the tread 29 is tilted down to bridge the gap between the lift 13 and the floor 22 on the predetermined floor, and the fork truck 21 is advanced to the floor 22 on the predetermined floor, as described above. The fork 25 is lowered at a predetermined position to place the pallet 24 on the floor 22. Pallet 2
After placing 4 on the floor 22, the fork truck 21 is pulled into the lift 13 and the carrying operation is completed.

When the pallet 24 is transported from the predetermined floor to the ground floor or the lower floor, the same operation is performed in the route reverse to the above.

Although not shown, the fork truck 21
Includes a pickup position detection sensor, a reverse limit position detection sensor, a fork ascent / descent limit detection sensor, a load detection sensor, and the like, and detection signals of these sensors are sent to the control device 39 one by one, According to this, each operation is controlled.

In the above embodiment, the guide rails 27 and 30 and the guide rollers 37 are provided so that the fork truck 21 travels more accurately on the floor 26 of the lift 13 and the floor 22 of the building 11. The guide rails 27 and 30 and the guide roller 37 do not necessarily have to be provided if is smooth.

The above-mentioned construction lift device includes the lift 13
Since the fork truck 21 is installed inside the fork truck 21 so that the fork truck 21 can be moved across the lift 13 and the floor 22 on the construction floor, the pallet 24 containing the material is transferred to the fork truck 2.
1 from the floor 22 on the construction floor into the lift 13,
Or transfer from inside the lift 13 to the floor 22 on the construction floor,
Loading and unloading operations can be performed automatically.
Moreover, since the fork truck 21 is configured to be lightweight and small, the equipment weight in the lift 13 is significantly reduced,
It is possible to use a general construction work lift without reducing the weight of material loaded on the pallet 24. Moreover, since the load width L of the loading platform 46 of the fork 25 is adjustable, the load can be transported in a stable state by adjusting the loading width L of the loading platform 46 according to the state and size of the load. There is no risk that the fork truck 21 will fall or the pallet 24 will fall. Further, since the operation of the fork truck 21 is automated, work efficiency is improved, and
The pallets 24 of the lift 13 and the floor 22 of each construction floor are exclusively used for carrying in and out, so that the work can be further simplified.

[0027]

The forklift truck for construction according to the present invention is equipped with a fork truck in the lift, and since the fork truck can be self-propelled between the lift and the site, it is not necessary to equip the forklift truck at the site. The equipment cost and equipment weight can be reduced. Moreover, since the load width of the loading platform of the fork is adjustable, the load can be reliably supported regardless of the shape or size. As a result, it becomes possible to safely, reliably and efficiently carry the load without increasing the size of the lift.

[Brief description of drawings]

FIG. 1 is a side view of a construction lift device according to an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a perspective view of a fork.

FIG. 5 is a side view of a conventional construction lift device.

[Explanation of symbols]

 11 building 13 lift 14 hoisting rope 21 fork bogie 22 floor 23 car body part 24 pallet 25 fork 26 floor 35 wheel 36 hydraulic motor 41 lateral beam part 42 guide strut 43 elevating part 44 guide beam 45 auxiliary strut 46 loading base 47 base 48 screw rod

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location B66F 9/24 Z 7515-3F (72) Inventor Suetsutsu Otoya Kannon Shinmachi 4-chome, Nishi-ku, Hiroshima-shi, Hiroshima 6-22 No. 22 Hiroshima Mitsubishi Heavy Industries, Ltd. (72) Inventor Eisaburo Ito 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (72) Inventor Yoshihiko Tamura 1 Nishi-shinjuku, Shinjuku-ku, Tokyo No. 25-1 Taisei Construction Co., Ltd.

Claims (1)

[Claims] 1. A lift comprising a lift that can be raised and lowered between the ground and the site of a construction structure, and a fork truck provided for the lift. The fork truck has a bogie body that is self-propelled between the lift and the site. A lift device for construction, comprising: a fork that is provided on a trolley body to support a load on a trolley and ascends and descends while the load width of the trolley is adjustable.