JP3700094B2 - Lifter for opening - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an opening lifter that is installed and used in an opening inside a building.
[0002]
[Prior art]
In recent years, in the construction of high-rise, super-high-rise buildings and the like of RC structures (steel reinforced concrete structures) that have been rapidly increasing, various industrialization methods have been adopted from the viewpoint of shortening the construction period and reducing costs. Among them, the system formwork for beams is increasingly used.
This system formwork is used in the cycle of lifting, transportation, installation, concrete placement, demolding, and movement, but the problem is how to shorten the cycle to improve efficiency. A quick change of the frame is required. When reordering to the upper floor, it is necessary to lift the system formwork, and conventionally, for example, the following lifting method has been adopted.
(1) A load receiving stage is provided in the opening or outer periphery of the building, and the system formwork transported up to this stage is lifted up to the upper floor with a tower crane or the like.
(2) Install a special lift mainly for remodeling work at the opening or outer periphery of the building, and use this to lift to the upper floor.
[0003]
[Problems to be solved by the invention]
However, in the case of the above conventional tower crane, the tower crane is restrained for a considerably long time, which hinders the lifting work of other materials such as reinforcing bars, and the crane is also required for the replacement of the load receiving stage itself. There are problems such as.
On the other hand, in the case of using a dedicated lift, an efficient lifting work can be obtained after installation, but there is a problem that it takes time to install the rails or to change the work. For this reason, a self-climbing type lift that does not require a crane for replacement is now put into practical use, but in this case, a large number of workers and instructors are required, which increases the burden on the cost.
[0004]
The present invention provides a lifter for opening that is a self-climbing method, can be efficiently lifted by a small number of people, and can be easily replaced. For the purpose.
[0005]
[Means for Solving the Problems]
As a technical means for achieving this object, the present invention is a lifter provided in an opening communicating in the vertical direction inside a building, and a lower holding member that can be attached to and detached from an opening on an arbitrary floor is freely accessible. A main body frame provided; an expansion / contraction member provided on the main body frame; and an elevating frame provided on an upper end portion of the expansion / contraction member and provided with an upper holding member that is detachably attached to an opening of a required floor; When working, when temporarily fixing the main body frame to the opening of the lower floor via the lower holding member, extending the telescopic member to raise the lifting frame, the main frame to be replaced to the upper floor In the lifter for opening, the lifting frame is temporarily fixed to the opening of the required floor via the upper holding member and the body frame is pulled up by contracting the elastic member. A suspension member is attached to the lifting frame, its lower end is positioned on a floor below the floor on which the main body frame is temporarily fixed, the formwork unit assembled on the lower floor is held by the suspension member, and the lifting frame is A gist of the lifter for opening is that the formwork unit is lifted to a required floor by being raised.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an embodiment of an opening lifter according to the present invention. This is a scissor lifter. As shown in FIGS. 1 (a) and 1 (b), a main body frame 21 formed in a frame shape by a frame material, an expansion / contraction member 22 equipped on the main body frame 21, and this And an elevating frame 23 attached to the upper end of the elastic member 22.
[0007]
The main body frame 21 is set to a size that can pass through an opening 24 that communicates in the vertical direction inside the building, and a lower holding member 25 that is attached to and detached from the opening 24 on an arbitrary floor at the upper end, for example, sliding or rotating A pair of left and right outriggers are provided on both the left and right sides, and the lower holding member 25 protrudes and is received by the opening 24 (specifically, it is received by the floor or beam at the periphery of the opening). Temporarily fixed in the state. Further, a power source and a control device 29 are attached below the side portion of the main body frame 21.
[0008]
The expansion / contraction member 22 is a so-called scissors expansion / contraction unit in which two arms 22a intersect each other in an X shape, and a plurality of structural members that are pivotally supported by pins 22b are connected by pins 22c. And can be freely expanded and contracted in the vertical direction, and when it is contracted to the maximum, it is stored in the main body frame 21 as indicated by a virtual line in FIG.
[0009]
The lifting frame 23 is set to a size that can pass through the opening 24, and an upper holding member 31 that is attached to and detached from the opening 24 on the required floor, such as a sliding or rotating outrigger, can be freely inserted and removed at the lower end. The upper holding member 31 is protruded and received in the opening 24 and held in a horizontal state.
[0010]
Further, a tiltable slope 32 of power or manual operation is provided at the left and right ends of the lifting frame 23. When the slope 32 is tilted, the plate 23a and the floor S of the lifting frame 23 are placed as shown in FIG. Are concatenated. Further, a net frame-like curing fence 33 is erected at the front and rear ends of the lifting frame 23 so that the lifting frame 23 can be surrounded when the left and right slopes 32 are flipped up.
[0011]
The opening lifter according to the present invention configured as described above can lift a system formwork or building material on the elevating frame 23 and lift it to the upper floor, and can easily be replaced to the upper floor of the main body frame 21 itself. It can be carried out.
[0012]
FIG. 2 shows an operation sequence at the time of installation or removal of the lifter . First, as shown in (a), the entire lifter is suspended from above the opening 24 inside the building using a crane K or the like. After the lifter is suspended to the vicinity of the installation floor as in (b), the lower holding member 25 mounted on the main body frame 21 is projected. Next, the lower holding member 25 is further lowered as shown in (c) and the lower holding member 25 is landed on the opening 24 on the installation floor, and the lower holding member 25 is temporarily fixed to an anchor bolt (not shown) or the like as shown in (d). Remove hook F of crane K. Lifter removal is performed in almost the reverse operation sequence.
[0013]
FIG. 3 shows an operation sequence at the time of the work of the lifter . As shown in (a), after a material such as a system formwork (not shown) is transported and loaded on the lifting frame 23, a retractable slope 32 is attached. The gate is closed by flipping up, and the telescopic member 22 is operated by operating a remote controller (not shown) or the like as in (B) or (C) to raise the elevating frame 23 to a predetermined floor. After arrival, the gate is opened, the slope 32 is knocked down, and materials such as the system formwork are pulled out.
[0014]
4 (a) and 4 (b) show the actual lifting work, and the worker is placed on the floor on the cargo receiving side so that the delivery is completed promptly. In this way, materials such as system formwork can be efficiently lifted. In the figure, G is an openable protective fence installed so as to surround the opening.
[0015]
FIG. 5 shows an operation sequence when the main body frame 21 is rearranged to the upper floor. After the lifting frame 23 is lifted slightly above the required floor as shown in FIG. As shown in (b), the lifting frame 23 is slowly lowered to land the upper holding member 31. Thereafter, the temporary holding of the lower holding member 25 of the main body frame 21 is released and the main body frame 21 is lifted up slightly, and the telescopic member 22 is reduced in a state where the lower holding member 25 is stored as shown in FIG. The main body frame 21 is further pulled up to a predetermined height. After pulling up slightly above the refill floor, the lower holding member 25 protrudes again as shown in (d), the main body frame 21 is slowly lowered to land the lower holding member 25, anchor bolts (not shown), etc. Temporarily fix to. Thereafter, the lifting frame 23 is slightly raised to store the upper holding member 31, and the state of the body frame 21 is changed by holding the state as shown in (e) and lowering the lifting frame 23 to the body frame 21. Complete.
[0016]
Therefore, the main body frame 21 can be replaced by a self-climbing method without requiring a crane. Thereby, by lifting up the elevating frame 23 sequentially to the upper floor, the system formwork can be lifted up and replaced from the lower floor to the upper floor. As described above, not only system molds but also other building materials can be mixed or lifted independently.
[0017]
By the way, after the main body frame 21 is replaced, it is necessary to close the opening of the lower floor at an early stage. In the case of RC construction, the reinforcement arrangement and the mold of the opening have been conventionally performed by building a scaffold on the floor of the lower floor. We are doing frame work, but it was dangerous and inefficient because of work at high places. However, if the scissor lifter according to the present invention is used, the assembling work of the formwork unit is performed on the lower floor previously closed, and this is lifted to the opening of the upper floor to perform the bar arrangement work and the concrete placing work. As a result, the opening can be well closed (damage treatment).
[0018]
FIG. 6 shows an operation sequence at the time of the work . First, as shown in (a), on the floor B that is temporarily placed on the floor immediately below the opening 24 to be closed (the opening is already closed), FIG. The formwork unit U is assembled by drawing, joists and face plates. Next, as shown in (b), a suspension member R such as a wire or a screw rebar is attached to the periphery of the lifting frame 23 and hung, and the assembled formwork unit U is penetrated to prevent the suspension member R from coming off at the lower end. Install end stopper E. After that, as shown in (c), the lifting frame 23 is raised to raise the mold unit U to a predetermined height, and a support P is built on the lower floor, and the mold unit U is supported by a plurality of supports as shown in (d). After being supported by P, the bar arrangement work is performed on the formwork unit U. After the bar arrangement, the lifting frame 23 is lowered to loosen the suspension member R, and the end stopper E is removed. Then, after the suspension member R is pulled out, concrete is placed on the formwork unit U as shown in (e). In this way, the openings can be closed sequentially from the lower floor to the upper floor.
[0019]
The lifter according to the present invention can be used as a load receiving stage that can be changed by itself, and since it has a changing function, there is an advantage that it can be moved to the stage installation floor in a timely manner without using a crane or the like.
[0020]
【The invention's effect】
As described above, according to the present invention, the lifter for an opening is a self-climbing system equipped with an elevating frame, which can be efficiently lifted by a small number of people, and can be easily replaced. The lifting member is attached to the lifting frame, the lower end thereof is positioned on the floor below the floor on which the main body frame is temporarily fixed, the formwork unit assembled on the lower floor is held by the lifting member, and the lifting frame is raised As the formwork unit is lifted up to the required floor, the formwork unit can be lifted from the lower floor to the upper floor without the need for a crane, and can be refilled, and the lower floor is closed first. Assemble the formwork unit at the upper floor, lift it up to the opening on the upper floor, perform the bar arrangement work and the concrete placement work. ) Can be performed neatly, and compared with the case where a conventional lifting opening is provided and a lifting machine is temporarily installed, the opening work can be reduced and dangerous work at high places can be reduced. Moreover, there is an effect that the opening can be closed early from the lower floor to the upper floor sequentially.
[Brief description of the drawings]
FIG. 1 shows an embodiment of an opening lifter according to the present invention, in which (A) is a schematic front view during operation, and (B) is a top view.
FIGS . 2A to 2D are explanatory diagrams showing an operation sequence at the time of installing or removing the lifter for the opening.
FIGS. 3A to 3C are explanatory diagrams showing an operation sequence at the time of working the lifter for the opening.
FIGS . 4A and 4B are explanatory views showing the actual lifting work in the lifter for the opening. FIGS.
FIGS. 5A to 5E are explanatory views showing an operation sequence when the main body frame of the lifter for the opening is changed to the upper floor.
FIGS. 6A to 6E are explanatory diagrams showing an operation sequence at the time of mold work for closing the opening. FIGS.
[Explanation of symbols]
21 Main body frame 22 Stretchable member 23 Elevating frame 24 Opening portion 25 Lower holding member 29 Control device 31 Upper holding member 32 Slope 33 Curing fence
R Hanging member
U formwork unit

Claims (1)

  A lifter provided in an opening in the building that communicates with the vertical direction, and a main body frame in which a lower holding member that can be attached to and detached from an opening on an arbitrary floor is provided so as to be freely accessible. And an elevating frame that is attached to the upper end portion of the expansion and contraction member and that is provided with an upper holding member that can be freely inserted and removed from the opening portion of a required floor. While temporarily fixing through the lower holding member, when extending the telescopic member to raise the elevating frame and replacing the main body frame to the upper floor, the elevating frame is attached to the opening of the required floor. In the lifter for opening that temporarily fixes and retracts the expansion / contraction member and pulls up the main body frame, a suspension member is attached to the elevating frame, and the lower end portion is attached to the lifting frame. Position the body frame on the floor below the floor on which the body frame is temporarily fixed, hold the formwork unit assembled on the lower floor on the suspension member, and raise the lifting frame to bring the formwork unit to the required floor Lifter for opening, characterized by lifting.

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