Load receiving stage and hoisting system

Abstract

To provide a receiving stage that can be manufactured at low cost using general-purpose products.SOLUTION: A receiving stage 10 is provided in a floor opening 4 provided in a floor 3 of a building 2. The receiving stage 10 includes: a plurality of horizontal members 11; a flat plate-like stage body 12 supported by the horizontal member 11 and closing the floor opening 4; and locking jigs 13 provided at both ends of the horizontal members 11 and capable of being locked to a side edge of the floor opening 4. The locking jig 13 includes: a locking jig body 20 joined to an end of the horizontal member 11; a locking portion 30 rotatably provided on the locking jig body 20 and capable of being switched between a projecting state in which it projects outward and is locked to the side edge of the floor opening 4 and a retracted state in which it is housed in the locking jig body 20; and a fixing tool 40 for fixing the locking portion 30 to the locking jig body 20 in the projecting state or the retracted state.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a locking jig that constitutes a load-bearing stage provided in a floor opening, a load-bearing stage using this locking jig, and a weight-lifting system using this load-bearing stage.

Background Art

[0002] Conventionally, it has been proposed to provide a temporary loading stage in a vertically continuous floor opening such as an elevator shaft or a multi-story parking lot (see Patent Document 1). The loading stage of Patent Document 1 includes a main body formed to be smaller than the opening, and two sets of slide means that are telescopically attached to the main body. This slide means is formed such that when the slide means is extended, the loading stage is supported by a part of the building at the periphery of the opening on each floor. The temporary structure of Patent Document 2 includes a frame provided in a vertical hole penetrating portion, a support portion that supports the frame on the building body, a load lifting mechanism provided in the frame, and a scaffold portion provided between the frame and the outer peripheral portion of the vertical hole penetrating portion. The support portion is composed of a frame-side arm receiving member provided at an intermediate portion in the height direction of the frame, a long guide rail extending vertically provided at the tip of the frame-side arm receiving member, and an arm that is installed on the guide rail and can rotate in a plane orthogonal to the outer peripheral portion of the vertical hole penetrating portion facing each other.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention aims to provide a load-bearing stage and a lifting system that can be manufactured at low cost using general-purpose products. , the load receiving stage and and a lifting system.

Means for Solving the Problem

[0005] The inventor developed a locking jig that serves as a load-bearing stage provided in the floor opening of a structure, which includes a locking jig body to which a horizontal member is joined, and a locking portion rotatably provided on the locking jig body and capable of locking to the edge of the floor opening. By configuring a load-bearing stage including this locking jig, a horizontal member, and a stage body, the inventor focused on the fact that a load-bearing stage adapted to the size and shape of the floor opening can be manufactured at low cost, and thus arrived at the present invention. The locking jig of the first invention (for example, the locking jig 13 described later) is a locking jig (for example, the load-bearing stage 10 described later) that constitutes a load-bearing stage provided in a floor opening (for example, the floor opening 4 described later). It includes a locking jig body (for example, the locking jig body 20 described later) to which a horizontal member (for example, the horizontal member 11 described later) disposed between two opposite edges of the floor opening is joined, a locking portion (for example, the locking portion 30 described later) rotatably provided on the locking jig body and capable of switching between a protruding state where it protrudes outward and locks to the edge of the floor opening and a stored state where it is stored in the locking jig body, and a fixing tool (for example, the fixing tool 40 described later) for fixing the locking portion to the locking jig body in the protruding state or the stored state.

[0006] The load-bearing stage of the second invention (for example, the load-bearing stage 10 described later) is a load-bearing stage provided in a floor opening (for example, the floor opening 4 described later) of a structure (for example, the building 2 described later). It includes a plurality of horizontal members (for example, the horizontal members 11 described later) disposed between two opposite edges of the floor opening, a flat plate-shaped stage body (for example, the stage body 12 described later) supported by the horizontal members and closing the floor opening, and the locking jig of the first invention (for example, the locking jig 13 described later) provided at both ends of the horizontal member and capable of locking to the edge of the floor opening.

[0007] According to the present invention, by locking the locking portion of the load receiving stage to the edge of the floor opening, the load receiving stage can be easily installed in the floor opening. Further, by storing the locking portion of the load receiving stage, the load receiving stage can be easily hoisted through the floor opening. Further, by specially manufacturing only the locking jig and using general-purpose products for the horizontal members and the stage body, the load receiving stage can be manufactured at low cost. Further, by appropriately changing the length of the horizontal member, the size of the load receiving stage can be easily changed according to the size and shape of the floor opening. Further, by appropriately increasing the number of the horizontal members and the locking jigs provided at both ends of the horizontal members, it is possible to easily cope with the weight of the materials loaded on the load receiving stage.

[0008] The load receiving stage of the third invention is characterized in that the horizontal member is a steel retaining main material or a steel pipe for temporary construction materials, and the stage body includes a plurality of square steel pipes (for example, square steel pipe 50 described later) arranged at predetermined intervals, and a plurality of end joist angles (for example, end joist angle 51 described later) arranged at predetermined intervals on the square steel pipe, and a wooden scaffold board (for example, wooden scaffold board 52 described later) laid on the end joist angle. Specifically, the retaining main material is a steel material having an H-shaped cross section. The steel pipe for temporary construction materials is a standard product of JIS G3444 (carbon steel pipe for general structure) and JIS G3466 (square steel pipe for general structure).

[0009] According to the present invention, since a steel retaining main material or a steel pipe for temporary construction materials is used as the horizontal member, and the stage body is constructed by combining square steel pipes, end joist angles, and wooden scaffold boards, the load receiving stage can be manufactured at low cost using general-purpose products.

[0010] The hoisting system of the fourth invention is a hoisting system (for example, hoisting system 1 described later) including the above-described load receiving stage, wherein the structure is a building having a plurality of floors, the floor opening is formed continuously in the vertical direction on each floor of the building, and the hoisting system further includes a hoisting device (for example, hoisting device 6 described later) provided on the building structure (for example, floor structure 5 described later) directly above the floor opening of the building.

[0011] According to the present invention, since a hoisting device is provided on the structure directly above the floor opening of the building, the hoisting device can hoist the load receiving stage and move it up and down. Further, even if a temporary elevator is not installed in the floor opening, materials can be hoisted through the floor opening by the hoisting device.

Effects of the Invention

[0012] According to the present invention, it is possible to provide a , the load receiving stage and hoisting system that can be manufactured at low cost using general-purpose products can be achieved.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0014] In the present invention, as a load receiving stage provided in a floor opening of a structure, a horizontal member is provided in the floor opening, locking jigs are provided at both ends of the horizontal member, and a stage body is provided while being supported by the horizontal member. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a building 2 provided with a hoisting system 1 according to an embodiment of the present invention. The hoisting system 1 is provided in a building 2 as a structure having a plurality of floors. On each floor 3 of the building 2, a rectangular floor opening 4 that is continuous in the vertical direction is provided as an elevator shaft. The hoisting system 1 includes a load receiving stage 10 provided in the floor opening 4 of a predetermined floor, and a hoisting device 6 provided in the floor housing 5 of the top floor directly above the floor opening 4 of the building 2. The hoisting device 6 hoists the load receiving stage 10 and materials by winding up or unwinding a wire connected to a hook 7. Examples of the hoisting device 6 include an electric chain block, a lever block (registered trademark), an electric hoist, and a baby hoist.

[0015] FIG. 2 is a side view of the load receiving stage 10. FIG. 3 is a plan view of the load receiving stage 10. The load receiving stage 10 includes a cross member 11 disposed between two opposing edges of the rectangular floor opening 4, a flat plate-like stage body 12 supported by the cross member 11 and closing the floor opening 4, and locking fixtures 13 provided at both ends of the cross member 11 and capable of being locked to the edge of the floor opening 4. The cross member 11 is a steel gusset main material, and a plurality of cross members 11 are provided at predetermined intervals. Note that the cross member 11 is not limited to a steel gusset main material, and may be a temporary material steel pipe. The stage body 12 includes a plurality of square steel pipes 50 provided at predetermined intervals on the cross member 11, a plurality of end joist angles 51 provided at predetermined intervals on the square steel pipes 50, and a wooden scaffold board 52 laid on the end joist angles 51. The square steel pipes 50 extend in a direction perpendicular to the cross member 11. The end joist angles 51 extend in a direction perpendicular to the square steel pipes 50, that is, substantially parallel to the cross member 11.

[0016] FIG. 4(a) is a front view of the locking fixture 13, and FIG. 4(b) is a cross-sectional view taken along line I-I of the locking fixture 13 in FIG. 4(a). FIG. 5 is a cross-sectional view taken along line II-II of the locking fixture 13 in FIG. 4(a). The locking jig 13 includes a locking jig body 20 joined to the end of the horizontal beam 11, a locking portion 30 rotatably provided on the locking jig body 20 about a rotation axis R, and a fixture 40 for fixing the locking portion 30 to the locking jig body 20 in a predetermined posture. A through hole 21 is formed above the rotation axis R in the locking jig body 20. A hanging piece 22 is provided at the upper end of the locking jig body. The horizontal beam 11 is inserted into the lower end side of the locking jig body 20 and fixed with bolts 23.

[0017] As shown in FIG. 6, the locking portion 30 can be switched between a protruding state (shown in FIG. 4(b)) in which it protrudes outside the locking jig body 20 and locks to the edge of the floor opening 4 by rotating about the rotation axis R, and a stored state (shown in FIG. 7) in which it is stored in the locking jig body 20. Through holes 31 and 32 are formed at two locations around the rotation axis R of the locking portion 30. A plate 33 that abuts on the floor surface of the building 2 is provided at the tip of the locking portion 30, and a through hole 34 is formed in this plate 33. An anchor bolt 60 is driven in the floor 3 of the building 2 during subsequent construction, and the anchor bolt 60 is inserted through the through hole 34 and tightened with a nut 61, whereby the locking jig 13 is fixed to the floor 3 of the building 2 (see FIGS. 2 and 3).

[0018] The fixture 40 is composed of a bolt 41 and a nut 42. By inserting the bolt 41 through the through hole 21 of the locking jig body 20 and the through hole 31 of the locking portion 30 and tightening the nut 42, the locking portion 30 is fixed in the protruding state (see FIG. 4(b)). On the other hand, by inserting the bolt 41 through the through hole 21 of the locking jig body 20 and the through hole 32 of the locking portion 30 and tightening the nut 42, the locking portion 30 is fixed in the stored state (see FIG. 7).

[0019] In the above-described lifting system 1, the loading stage 10 is lifted and lowered as follows. That is, as shown in FIG. 8, the hook 7 of the hoisting device 6 and the suspension piece 22 of the locking jig 13 of the loading stage 10 are connected by a suspension wire 62. Next, the nut 61 screwed onto the anchor bolt 60 is removed, and then the locking portion 30 is rotated to the stored state. As a result, the loading stage 10 can pass through the floor opening 4. Next, the hoisting device 6 is driven to lift and lower the loading stage 10 to a predetermined floor. Thereafter, the locking portion 30 is rotated to the protruding state and locked to the floor opening 4, and the locking portion 30 is fixed to the floor 3 again with the anchor bolt 60 and nut 61 for subsequent construction.

[0020] According to the present embodiment, there are the following effects. (1) By locking the locking portion 30 of the loading stage 10 to the edge of the floor opening 4, the loading stage 10 can be easily installed in the floor opening 4. Further, by storing the locking portion 30 of the loading stage 10, the loading stage 10 can be easily lifted and lowered through the floor opening 4. In addition, only the locking jig 13 is specially manufactured, and general-purpose products are used for the cross member 11 and the stage body 12, so that the loading stage 10 can be manufactured at low cost. Further, by appropriately changing the length of the cross member 11, the size of the loading stage 10 can be easily changed according to the size and shape of the floor opening 4. In addition, by appropriately increasing the number of the cross member 11 and the locking jigs 13 provided at both ends of the cross member 11, it is possible to easily cope with the weight of the materials loaded on the loading stage 10.

[0021] (2) Since a steel retaining main material is used as the cross member, and the stage body is manufactured by combining a square steel pipe 50, an end angle member 51, and a wooden scaffold board 52, the loading stage 10 can be manufactured at low cost using general-purpose products. (3) Since the hoisting device 6 is provided on the floor body 5 directly above the floor opening 4 of the building 2, the hoisting device 6 can hoist and move the load receiving stage 10 up and down. Also, even without installing a temporary elevator at the floor opening 4, materials can be hoisted through the floor opening 4 by the hoisting device 6. Further, when the load receiving stage 10 is installed at the floor opening 4, materials can be placed on the stage body 12 of the load receiving stage 10.

[0022] Note that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within the scope that can achieve the object of the present invention are included in the present invention. For example, in the above-described embodiment, the hoisting device 6 is provided on the floor body 5 directly above the floor opening 4 of the building 2, and the hoisting device 6 is used to hoist materials through the floor opening 4 or move the load receiving stage 10 up and down. However, the present invention is not limited to this, and a tower crane may be used to hoist materials through the floor opening 4 or move the load receiving stage 10 up and down.

Explanation of Reference Numerals

[0023] 1... Hoisting system 2... Building 3... Floor 4... Floor opening 5... Floor body 6... Hoisting device 7... Hook 10... Load receiving stage 11... Cross member 12... Stage body 13... Locking fixture 20... Locking fixture body 21... Through hole 22... Suspension piece 23... Bolt 30... Locking portion 31... Through hole 32... Through hole 33... Plate 34... Through hole 40... Fixture 41... Bolt 42... Nut 50... Square steel pipe 51... Square bar 52... Wooden scaffold board 60... Anchor bolt 61... Nut 62... Suspension wire

Claims

1. A load-bearing stage provided at a floor opening of a structure, comprising: a plurality of horizontal members disposed between two opposite edges of the floor opening; a flat stage body supported on the horizontal members to close the floor opening; locking fixtures provided at both ends of the horizontal members and capable of locking to the edge of the floor opening; the locking fixture includes a locking fixture body to which the horizontal member is joined; a locking portion rotatably provided on the locking fixture body and capable of switching between a protruding state in which it protrudes outside the locking fixture body and locks to the floor surface at the edge of the floor opening by rotation and a stored state in which it is stored in the locking fixture body; a fixing tool for fixing the locking portion in the protruding state or the stored state to the locking fixture body; the horizontal member is a steel stay main member or a temporary installation material steel pipe inserted into the lower end side of the locking fixture and bolt-fixed to the locking fixture; the stage body includes a plurality of square steel pipes arranged at predetermined intervals, a plurality of end square bars arranged at predetermined intervals on the square steel pipes, and a wooden scaffold board laid on the end square bars; A load-bearing stage, characterized in that the upper surface of the wooden scaffold board is substantially flush with the floor surface at the edge of the floor opening.

2. A hoisting system comprising the load-bearing stage according to Claim 1, wherein: the structure is a building having a plurality of floors; the floor openings are formed continuously in the vertical direction on each floor of the building; the hoisting system further includes a hoisting device provided on the structure directly above the floor opening of the building.

Images