JPH0835336A - Safety unit for floor surface opening part - Google Patents

Abstract

PURPOSE:To faciliate opening and closing of a cover plate and setting of a fence and to facilitate opening and closing of the cover plate in a state where there is the fence. CONSTITUTION:A safety unit is constituted of a rectangular base frame 14, a pair of left and right cover plates 16, a pair of left and right fence frames 18 and a pair of ropes 20. The base frame i4 is constituted free to bend at its central part as it is required to fold compact. The fence frames 18 are free to be folded at a position where they are overlapped with the base frame 14. The cover plates 16 are constituted of mesh plates to secure lightness and gas permeability and installed on the base frame 14 free to revolve. When a worker goes in and out of the inside of an opening part, the cover plates 16 are revolved to a vertical position and engaged with the base frame 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor opening safety unit having a cover plate and a handrail frame.

[0002]

2. Description of the Related Art When an opening is formed on the floor of a building under construction, it is necessary to take measures to prevent the opening from falling. For example, as shown in FIG. 6, when the space portion 4 is formed inside the floor layer 2 on the basement floor, it is necessary to take out the formwork for forming the space portion 4 from the space portion 4 after the curing of the floor layer 2 concrete is completed. Therefore, an opening 8 for taking out the formwork is formed on the floor surface 6.
Is formed. The opening 8 is normally closed by a cover plate 10 and is removed only when working in the space 4, and a fence (not shown) for preventing falling is arranged around the opening 8 at this time. .

[0003]

With the conventional lid plate 10 and fence, it is troublesome to lift the lid and move the fence when the opening 8 is frequently opened and closed, and the lid plate 10 is removed. Then, the opening 8 is exposed, and even if a fence is installed around the opening 8, there is a risk of a fall accident during the installation work of the fence. Further, even if a fence is installed before removing the lid plate 10 and the user tries to lift the lid plate 10 by reaching out from the outside of the fence in this state, the lid plate 10 is usually made of steel plate and is very heavy, so work efficiency is high. It is not good, and it is dangerous for the worker to easily lose balance. Further, most of the conventional cover plates 10 are single-use disposable products, and no consideration has been given to the convenience of transportation and storage.

An object of the present invention is to realize a safety unit for a floor opening, which facilitates opening and closing of a cover plate and installation of a fence, and facilitates opening and closing of the cover plate with the fence installed. The goal is to be able to fold the safety unit compactly.

[0005]

In order to solve the above problems, the present invention relates to a base frame arranged around a floor opening, a closed position attached to the base frame and covering the opening, and Between a lid plate that is rotatable between a vertical position that is erected on the base frame, a folding position that is attached to the base frame and that overlaps the base frame, and a vertical position that is erected on the base frame. And a handrail frame that can be freely rotated.

Further, in order to make the safety unit compact, the base frame is bent at its central portion so as to be overlapped with each other, and the lid plates are composed of a pair of left and right parts, which are respectively rotatable to the left and right side parts of the base frame. And a pair of left and right handrail frames, which are rotatably attached to both left and right sides of the base frame.

[0007]

[Function] Since the lid plate and the fence frame are combined,
The lid plate is always opened and closed with the fence frame, and since the lid plate is rotatable, it is easy to open and close, which ensures a high degree of safety. The base frame can be folded at the center and the safety unit is made foldable, which makes the transportation and storage of the safety unit convenient and makes the economical efficiency of repeated use realistic.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the floor opening safety unit 12
Is a rectangular or square base frame 14 that is slightly larger than the opening 8 (see FIG. 6), a pair of left and right cover plates 16 rotatably attached to the base frame 14, and is also rotatable on the base frame 14. It has a pair of left and right fence frames 18 attached to each other and a pair of ropes 20 stretched between both fence frames 18.

The base frame 14 is divided into a left and right pair at the center thereof, and the left and right base frames 14 are shown in FIG. 3 (d).
Connection plate 2 arranged inside the base frame 14 like
Two are foldably connected to each other. Specifically, elongated holes 24 are formed at both ends of the connecting plate 22, bolts 26 serving as a rotation shaft are inserted into the elongated holes 24, and the tip ends of the bolts 26 are fixed to the end portions of the left and right base frames 14. .

At least both side frame portions of the left and right base frames 14 are each formed of a square pipe as shown in FIG. 3C, and a prismatic rod 28 is slidable inside the both side frame portions of one base frame 14. It is stored. An elongated hole 30 is formed on the side surface of each of the frame portions on both sides, and a bar-shaped handle 32 horizontally projecting from the side surface of the rod 28 projects horizontally outward from the elongated hole 30.

The pair of left and right lid plates 16 are made of a steel mesh plate in order to reduce the weight and ensure the air permeability, and the base end portion on the rotation support side is the base frame 14 as shown in FIG. 4 (c).
Is rotatably supported by pins 36 protruding from the inner surface of a bracket 34 that is erected at the four corners of the bracket.
As shown in FIG. 1, a bar member 38 extending in the width direction of the lid plate 16 (the front-rear direction in FIG. 1) is fixed to the lower surface of the vertically movable tip of the lid plate 16. The length of the rod 38 is matched with the width of the base frame 14, and both ends of the rod 38 are in contact with the upper surface of the base frame 14 when the cover plate 16 is tilted to the horizontal closed position. .

As shown in FIG. 1, the fence frame 18 is formed by fitting two U-shaped frames in a slidable manner in a nested manner, and as shown in FIG. 4, the base end of the lower fence frame 18a is the base. It is rotatably supported by brackets 34 at the four corners of the frame 14. Specifically, the bracket 34 is a U-shaped metal fitting that is erected vertically on the base frame 14.
Long holes 40 are formed in the vertical direction on both left and right side walls of the bracket 34. The bolt 4 as a rotation shaft is provided in the long hole 40.
2 is inserted, and the base end of the fence frame 18 is rotatably supported by the bolt 42.

The upper fence frame 18b is slidable in the vertical direction with respect to the lower fence frame 18a as shown by an arrow in FIG. 1, and when extended upward, a pin is inserted into the hole at the upper end of the lower fence frame 18a. Inserting 44 secures it in the extended position of FIG. Metal fittings (not shown) for fixing both ends of the pair of ropes 20 are arranged at the upper end of the upper fence frame 18b, and the rope 2 is provided between the metal fittings.
0 is passed over.

The fence frame 18 is rotatable to a folding position where it overlaps with the base frame 14, and in this case, as shown in FIG.
As shown in (c), the upper fence frame 18b is slid and housed in the lower fence frame 18a, and the holes (not shown) formed at the upper ends of the upper fence frame 18b and the lower fence frame 18a are aligned with each other. Moreover, the two aligned holes are aligned with the holes 48 at the upper end of the bracket plate 46 fixed to the base frame 14, and the pin 44 is inserted through these holes, whereby the fence frame 18 is locked in the folding position.

The safety unit 12 for the floor opening is constructed as described above, and the safety unit 12 is shown in FIG.
It is compactly folded as shown in (a) and is stored and transported in this state. The safety unit 12 transferred to the construction site is opened in the direction of the arrow from the state shown in FIG. 3 (a), is horizontally developed as shown in FIG. 3 (b), and is covered with the opening (not shown) in this state. To be Next, as shown in FIG. 3C, the handle 32 is pushed in the direction of the arrow to fit the tip of the rod 28 into the tip opening of the opposing base frame 14. As a result, bending at the center of the left and right base frames 14 is prevented.

Next, a total of four pins 44 are attached to the bracket plate 4
6, and the fence frame 18 is rotated upward 90 ° from the folded position of FIG. 3C to the vertical position of FIG.
When the fence frame 18 is rotated 90 °, FIG. 4 (a)
As shown in (b), the weight of the fence frame 18 causes the bolt 42, which is the pivot axis of the fence frame 18, to naturally move downward along the elongated hole 40, and the lower end of the fence frame 18 is the end of the base frame 14. The bracket frame 18 is fitted in the rectangular vertical hole 52 defined by the bracket 34, and thereby the fence frame 18 is held in the vertical state.

Next, the upper fence frame 18b is pulled up vertically as shown in FIG. 1, and the pin 44 is inserted into the upper end portion of the lower fence frame 18a to fix the upper fence frame 18 to the raised position. Then, the rope 20 shown by the chain line in FIG.
Remove one end of the lock bracket from the lock bracket and replace it with the lock bracket of the opposing fence frame 18 as shown by the solid line.

The installation of the safety unit is completed for the time being, but if necessary, a rope 20 may be provided between the left and right fence frames 18.
In addition to the above, a horizontal reinforcing material is spanned to enhance the lodging resistance of the fence frame 18, and the rope 20 is also supported by the horizontal reinforcing material.
You may strengthen the off-limits function in the lower space area.

When the installation of the safety unit shown in FIG. 1 is completed,
A fence frame 18 is erected on both left and right sides of the lid plate 16, and a rope 20 is stretched between the left and right fence frames 18.
The upper surface of is a so-called off-limit area. In this state, the lid plate 16 is rotated in the direction of the arrow in FIG. 1, and the upper end portion of the lid plate 16 and the fence frame 18 are locked with arbitrary locking metal fittings while the lid plate 16 is vertically erected. , Foundation frame 14
The opening inside can be opened. At this time, since the periphery of the opening is already surrounded by the fence frame 18 and the rope 20, the lid plate 16 is made of a mesh plate and is very lightweight and can be easily opened and closed.
There is no risk of accidentally falling into the opening during opening and closing work. Further, if the rope 20 is removed, it can easily go in and out inside the opening.

Although one embodiment of the present invention has been described above, the present invention is not limited to the structure of the above embodiment and various modifications are possible. For example, the cover plate 16 is a steel plate other than the mesh plate or Various plate materials such as plywood can be used, and holes may be formed in these plate materials to improve air permeability. Further, since the fence frames 18 on both sides of the opening ensure a certain degree of safety, it is not always necessary to stretch the rope 20 between the fence frames 18, but if the rope 20 or a chain is stretched, the safety is further enhanced. . The shapes of the base frame 14 and the fence frame 18 may be appropriately changed depending on the shape or size of the opening, and are not necessarily limited to a rectangle, a square, or a U-shape. If an inclined plate 54 as shown in FIG. 5 is attached to the base frame 14, it is convenient for a truck or the like to smoothly pass over the lid plate 16.

[0021]

As described above, the present invention is a safety unit for a floor opening which is a combination of a cover plate and a fence frame. Since the cover plate is of a rotating type, it can be easily opened and closed. Since a fence frame is always erected on the side, a high degree of safety is ensured when opening and closing the cover plate. Further, by making the base frame bendable in the central portion and forming a pair of left and right cover plates and fence frames, the safety unit can be folded compactly, which is convenient for storage and transportation.

[Brief description of drawings]

FIG. 1 is a perspective view of a floor opening safety unit according to an embodiment of the present invention.

FIG. 2 is a perspective view of the safety unit during assembly.

FIG. 3A is a perspective view of the safety unit when not in use,
(B) is a perspective view during assembly of the safety unit, (c) is a perspective view of a connecting portion of the left and right base frames 14, and (d) is a side view of a connecting portion of the left and right base frames 14.

4A is a side view of a rotation support portion of the fence frame 18 in a lying state, FIG. 4B is a side view of the rotation support portion of the fence frame 18 in a standing state, and FIG. The top view of the rotation support part of the fence frame 18.

FIG. 5 is a side view of a modified example of the safety unit.

FIG. 6 is a cross-sectional view of a conventional floor surface opening lid.

[Explanation of symbols]

 12 Floor opening safety unit 14 Foundation frame 16 Lid plate 18 Fence frame 20 Rope

Claims (2)

[Claims] 1. A base frame disposed around a floor surface opening, a closed position attached to the base frame to cover the opening, and a vertical position erected on the base frame. A floor comprising a movable cover plate, a handrail frame that is attached to the base frame and is rotatable between a folding position that overlaps the base frame and a vertical position that is erected on the base frame. Safety unit for face opening. 2. The base frame is bent at its central portion so as to be overlapped with each other, and the lid plates are composed of a pair of left and right parts, which are rotatably attached to the left and right side parts of the base frame, respectively. The safety unit for a floor opening according to claim 1, wherein the frame is composed of a pair of left and right and is rotatably attached to both left and right sides of the base frame.