JP7251733B2 - Load receiving stage and lifting system - Google Patents

Description

The present invention relates to a load-receiving stage provided in a floor opening of a building and a lifting system using this load-receiving stage.

BACKGROUND ART Conventionally, it has been proposed to provide a stage at a floor opening in a building in order to perform construction or lifting work at the floor opening (see Patent Documents 1 to 3).
Patent Literature 1 shows an elevating stage scaffolding. This elevating type stage scaffolding includes a frame scaffold laminated in a plurality of layers, a stage scaffold detachably bridged between the frame scaffolds, and an elevating device for elevating the stage scaffold. In the elevating stage scaffolding, the stage scaffolding is set up at an arbitrary height according to the progress of work and the type of work.

Patent Literature 2 shows a pickup stage. The pick-up stage comprises a body smaller than an opening in the building and slide means telescopically attached to the body. In this loading stage, when the slide means is extended, the main body is engaged with the opening of the predetermined floor and can be used as a loading stage for the predetermined floor. Other floors can be refurbished.

Patent Literature 3 shows a lifting stage for construction work. A lifting stage for construction work includes a work table and a wire wound around a winch or a pulley for lifting and lowering the work table. The workbench is provided with extendable support beams that can be extended and stored on both sides. In this elevating stage for construction work, when the telescopic support beam is extended, the workbench is engaged with the beam of the building, and when the telescopic support beam is retracted, the workbench can be removed with a winch.

JP 2008-174903 A JP-A-11-159149 JP-A-6-129089

SUMMARY OF THE INVENTION It is an object of the present invention to provide a load receiving stage and lifting system that allows material to be placed and lifted through a floor opening in a building.

The inventors of the present invention installed a stage main body in a floor opening of a building, installed a chain block on the framework of the floor directly above this stage main body, attached the stage main body to the lower end of the chain block, and attached the chain block to this structure. By opening and closing the stage body, materials can be loaded and unloaded through the floor opening when the stage body is open, without installing a temporary elevator inside the building. The inventors have focused on the point that the stage main body can be used as a work floor in a state where the parts are closed, and have arrived at the present invention.
A load receiving stage (for example, a load receiving stage 20 to be described later) of the first invention is a load receiving stage provided in a floor opening (for example, a floor opening 11 to be described later) of a building (for example, a building 10 to be described later), A stage main body (for example, a stage main body 21 to be described later) whose one end side is pivotally supported in a floor opening of a predetermined floor so as to be openable and closable, and the frame structure of the floor directly above the predetermined floor and the other end side of the stage main body are connected. A chain block (for example, a chain block 22 to be described later) is provided, and when a chain of the chain block (for example, a chain 24 to be described later) is wound up, the stage main body is opened, and when the chain is unwound, the The stage body is in a closed state.

According to this invention, the stage main body is pivotally supported at one end so that it can be opened and closed, and the chain block is connected to the other end of the stage main body. Therefore, when the chain of the chain block is wound up and the stage body is opened, materials can be lifted through the floor opening. materials can be placed in Therefore, materials can be lifted without installing a temporary elevator at the floor opening in the building.

In the load receiving stage of the second invention, a support piece (for example, a support piece 15 to be described later) having a through hole (for example, a through hole 16 to be described later) is provided in the peripheral edge portion of the floor opening, and the stage main body A rotary piece (for example, a rotary piece 44 to be described later) having a through hole (for example, a through hole 45 to be described later) is provided on one end side of the support piece, and the through hole of the support piece and the through hole of the rotary piece are It is characterized in that a rotating shaft (for example, a rotating shaft 17 described later) is inserted therethrough.

According to the present invention, the supporting piece is provided on the peripheral edge of the floor opening, and the rotating piece of the stage body is supported by the rotating shaft on the supporting piece, so that the stage body can be easily opened and closed.

A lifting system according to a third aspect of the invention (for example, a lifting system 1 to be described later) includes the above-described load-receiving stage provided in the floor opening of each floor arranged vertically in a building having multiple floors. The lifting system is characterized by further comprising a lifting device (for example, a hoist 30 to be described later) provided on a frame above the stage body on the top floor.

According to this invention, a lifting device capable of lifting materials is provided above the stage body (floor opening) on the top floor. Therefore, even if a temporary elevator is not installed in the floor opening, the material can be lifted through the floor opening by the lifting device by opening the stage body.

SUMMARY OF THE INVENTION The present invention provides a load receiving stage and lifting system that allows material to be placed and lifted through a floor opening in a building.

1 is an elevational view of a lifting system according to one embodiment of the present invention; FIG. Figure 2 is a plan view of the load receiving stage of the lifting system of Figure 1; FIG. 2 is a plan view showing the skeleton of the receiving stage of FIG. 1; Figure 2 is an elevational view of the load receiving stage of Figure 1; 5 is an enlarged elevational view and an enlarged horizontal cross-sectional view of a portion surrounded by dashed line A in FIG. 4; FIG. 2 is an elevational view showing the operation of the receiving stage of FIG. 1; FIG.

The present invention is a lifting system comprising a load receiving stage provided at the floor opening of each floor of a building and a lifting device provided above the load receiving stage on the top floor. The load-receiving stage includes a stage body pivotally supported at one end in a floor opening of a building, and a chain block connected to the other end of the stage body. When the chain block is hoisted and the stage body is open, materials can be loaded and unloaded through the floor opening, and when the chain block is unwound and the stage body is closed, the stage body can be used as a work floor. can.
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is an elevational view of a lifting system 1 according to one embodiment of the invention.
The lifting system 1 lifts materials through floor openings 11 formed on each floor vertically in a building 10 under construction. This lifting system 1 includes a load receiving stage 20 provided at the floor opening 11 of each floor of the building 10 under construction, a hoist 30 as a lifting device provided on the frame above the load receiving stage 20 on the top floor, Prepare.

FIG. 2 is a plan view of the receiving stage 20. As shown in FIG. FIG. 3 is a plan view showing the framework of the receiving stage 20. FIG. FIG. 4 is an elevational view of the receiving stage 20 of FIG.
The building 10 includes a plurality of pillars 12, large beams 13 constructed between the pillars 12, and small beams 14 constructed between the large girders 13. The floor opening 11 is an opening surrounded by three large girders 13 and small girders 14 . Hereafter, among the girders 13, the girders 13A, 13B, and 13C that constitute the peripheral edge of the floor opening 11 are referred to as girders 13A, 13B, and 13C.

The load-receiving stage 20 includes three stage bodies 21 pivotally supported at one end in the floor opening 11 so as to be openable and closable, and three pairs connecting the other end of the stage bodies 21 to the small beams 14 on the floor immediately above the current floor. and four gap covers 23 for closing gaps between the stage body 21 and the floor opening 11.
The gap covers 23 are installed between the stage main bodies 21 and between the stage main body 21 and the girders 13A and 13C.

Each stage main body 21 has a rectangular shape and is constructed between the large beam 13B and the small beam 14. As shown in FIG. The stage main body 21 includes a rectangular framework 40 formed by joining H-shaped steel 41 in a grid pattern, a steel plate 42 provided on the framework 40, and large beams 13B and small beams 13B provided on the lower surface of the framework 40. and a contact portion 43 that contacts the beam 14 .

FIG. 5(a) is an enlarged elevational view of the portion enclosed by the dashed line A in FIG. FIG. 5(b) is an enlarged horizontal sectional view of the portion surrounded by the dashed line A in FIG.
Rotating pieces 44 each having a through hole 45 are provided at the corners of one end side (on the side of the small beam 14 ) of the stage body 21 .
A pair of support pieces 15 having through holes 16 are provided on the upper surface of the small beam 14 at the peripheral edge of the floor opening 11 so as to face the rotating piece of the stage body 21 . A rotating shaft 17 is inserted through the through hole 16 of the supporting piece 15 and the through hole 45 of the rotating piece 44 , thereby supporting the stage main body 21 on the small beam 14 .

Hanging pieces 46 are provided at the four corners of the upper surface of the stage main body 21 . The chain 24 of the chain block 22 is connected to the suspension piece 46 on the other end side (the side of the large girders 13A) of the stage body 21 .
When the chain 24 of the chain block 22 is unwound, the other end side of the stage main body 21 is lowered and the stage main body 21 is closed. On the other hand, when the chain 24 is wound up, the other end of the stage main body 21 is pulled upward as indicated by the dashed lines in FIGS. 6 and 1, and the stage main body 21 is opened.

A stage receiver 18 is provided on the lower surface of the upper flange of the small beam 14 so that the contact portion 43 of the stage body 21 contacts the upper surface of the stage receiver 18 when the stage body 21 is closed. It's becoming
The hoist 30 is provided on the beam frame (girders 13) on the upper floor of the stage main body 21 on the top floor.

The above lifting system is used as follows.
As an initial state, as shown in FIGS. 1 to 5, the stage body 21 of the goods receiving stage 20 is closed and the gap cover 23 is attached. In this state, materials can be placed on the receiving stage 20 .
When the gap cover 23 is removed from this state and the chain 24 of the chain block 22 is wound up, the stage main body 21 is opened. In this condition, the hoist 30 allows material to be hoisted through the floor opening 11 .

According to this embodiment, there are the following effects.
(1) The stage main body 21 is pivotally supported at one end so that it can be opened and closed, and the chain 24 of the chain block 22 is connected to the other end of the stage main body 21 . Therefore, when the chain 24 of the chain block 22 is wound up and the stage main body 21 is opened, the material can be lifted through the floor opening 11, and the chain 24 of the chain block 22 is unwound and the floor opening 11 is opened by the stage main body 21. Materials can be placed on the stage main body 21 in the closed state. Therefore, materials can be lifted without installing a temporary elevator at the floor opening in the building.

(2) Since the support pieces 15 are provided on the small beams 14 on the periphery of the floor opening 11, and the rotation pieces 44 of the stage body 21 are pivotally supported by the support pieces 15, the stage body 21 can be easily opened and closed.
(3) A hoist 30 capable of lifting materials is provided above the stage body 21 . Therefore, the material can be lifted through the floor opening 11 by the hoist 30 by keeping the stage main body 21 open without installing a temporary elevator in the floor opening.

It should be noted that the present invention is not limited to the above-described embodiments, and includes modifications, improvements, etc. within the scope of achieving the object of the present invention.

DESCRIPTION OF SYMBOLS 1... Lifting system 10... Building 11... Floor opening 12... Column 13, 13A, 13B, 13C... Large beam 14... Small beam 15... Support piece 16... Through hole 17... Rotating shaft 18... Stage receiver 20... Load receiving stage 21 ... Stage main body 22 ... Chain block 23 ... Gap cover 24 ... Chain 30 ... Hoist (lifting device)
DESCRIPTION OF SYMBOLS 40... Frame 41... H-shaped steel 42... Steel plate 43... Contact part 44... Rotating piece 45... Through hole 46... Hanging piece

Claims (3)

A receiving stage provided at a floor opening of a building,
a plurality of stage bodies arranged side by side in a floor opening of a predetermined floor and pivotally supported at one end so that they can be opened and closed;
a plurality of chain blocks that connect the skeleton of the floor directly above the predetermined floor and the other end side of the stage main body;
a gap cover that closes a gap between the stage main bodies and/or a gap between the stage main body and the peripheral edge of the floor opening,
A goods receiving stage, wherein when the chain of the chain block is wound up, the stage body is in an open state, and when the chain is unwound, the stage body is in a closed state. A support piece having a through hole is provided at the peripheral edge of the floor opening,
A rotating piece having a through hole is provided on one end side of the stage body,
2. The receiving stage according to claim 1, wherein a rotary shaft is inserted through the through hole of the supporting piece and the through hole of the rotating piece. A lifting system comprising the load-receiving stage according to claim 1 or 2 provided in a floor opening of each floor arranged vertically in a building having a plurality of floors,
A lifting system, further comprising a lifting device provided on a frame above the stage main body on the top floor.

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