JPH07116848B2 - Curing lid device with handrail for slab opening - Google Patents

Description

TECHNICAL FIELD The present invention relates to a curing lid device with a handrail for slab openings.

[Prior Art] Generally, when building a building such as reinforced concrete, the floor slab is provided with openings for carrying out formwork and supporting materials, and for workers to enter and exit. After building the slab, the slab is used as an inspection port or is a dead hole that is eventually closed.

The slab opening as described above is usually covered with a lid during construction to prevent it from falling, and it is designed to be used with the lid removed when carrying in and out of materials and when workers are in and out. In addition, a curing handrail was installed around the opening.

[Problems to be Solved by the Invention] However, when the materials are taken in and out, the handrail may get in the way and may be removed, or the lid may be put on after the materials have been carried out or the workers have come and go. I often forgot, and accidents due to falling materials and workers were constant.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to make a handrail at the edge of the opening when the lid is opened by integrating the lid and the handrail. You can definitely get it in and out safely,
Another object of the present invention is to provide a curing lid device with a handrail for a slab opening in which the handrail is also folded when the lid is covered, which does not hinder the work.

[Means for Solving the Problems] A curing lid device with a handrail for a slab opening according to the present invention includes a stepped base frame to be attached to the inner peripheral edge of the slab opening, and the stepped base frame can be opened and closed at one side. A curing lid pivotally attached to the curing lid, a handrail pipe bendably attached to the curing lid, and a support pipe bendably attached to the other side of the base frame, and the other end of the handrail pipe and the support pipe It is characterized in that the parts are connected so as to be bendable.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a slab opening, and a stepped base frame 2 as shown in FIGS. 2 and 3 is installed on the inner peripheral edge thereof.

On one side of the stepped base frame 2, a supporting piece 3 as shown in an enlarged scale in FIG. 4 is provided, and on the other side, a universal joint bearing as shown in an enlarged scale in FIG. A shaft 4 is provided.

Reference numeral 5 is a curing lid, and as shown in FIGS. 6 and 7, a wire mesh 6 made of, for example, expanded metal is stretched. The curing lid 5 may be covered with an iron plate or the like. On one side of the curing lid 5, a locking piece 7 as shown in an enlarged scale in FIG. 8 is provided, which is locked to the shaft 3a of the support piece 3 of the stepped base frame 2 to be 5 is attached so that it can be opened and closed.

On the other side of the curing lid 5, a universal joint support shaft 8 as shown enlarged in FIG. 9 is provided, and legs 9 as shown enlarged in FIG. 10 are fixed.

Referring again to FIG. 1, 10 is a handrail pipe, one end side of which is flexibly connected to the universal joint support shaft 8 through a universal joint 11 as shown in FIG. Is extrapolated.

As shown in FIGS. 11 and 12, a connecting piece 10a is provided on the other end side of the handrail tube 10 and is rotatably connected to a connecting piece 13a provided on the upper end side of the support tube 13. Has been done.

As shown in FIG. 5, the lower end side of the support tube 13 is
It is flexibly connected to the universal joint support shaft 4 via a universal joint 14, and a slide tube 15 is externally inserted.

In FIG. 1, 16 is a reinforced handrail pipe, one end side of which is rotatably connected to the upper end of one support pipe 13 via a pin 16a, as shown in FIG. On the other end side, as shown in FIGS. 13 (A) and (B), holes 17a are formed.
A locking piece 17 opened is provided so that it can be freely engaged with and disengaged from a lock shaft 13a provided at the upper end of the other support tube 13. The reinforcing handrail pipe 16 obtained by removing the hooking piece 17 from the lock shaft 13a is folded into a virtual line state as shown in FIG. 1 to support the hooking piece 17 as shown in FIG. tube
It is adapted to be hooked on a lock shaft 15a attached to the slide tube 15 of 13.

Since the curing lid device of the above embodiment is configured as described above, in order to cover the slab opening portion 1 with the curing lid 5 from the state shown in FIG. 1, first, the reinforcing handrail tube 16 is reinforced as described above. The hooking piece 17 is removed from the lock shaft 13a of the support tube 13 and folded as shown by an imaginary line in FIG.

Next, the slide pipe 12 is pulled out from the bearing shaft 8 as shown by the arrow in FIG. 9, and the slide pipe 15 is pulled out from the bearing shaft 4 as shown by the arrow in FIG. 5, and the support pipe 13 and the handrail pipe 10 are bent. Freedom.

Subsequently, as shown in FIG. 15, after rotating the handrail pipe 10 and the support pipe 13 from the virtual line state to the solid line state,
As shown, the curing lid 5 is closed.

FIG. 17 shows the supporting shaft 4 which is planted in the stepped base frame 2.
FIG. 9 is an overall side view of an apparatus showing another embodiment replacing the universal joint method of connecting the support shaft 13 with the support tube 13 and connecting the support shaft 8 planted in the curing lid 5 with the handrail tube 10. As shown in FIG.
The connection end face of (8) is a slope 4a (8a) of about 45 °, and the connection end face of the support pipe 13 (handrail pipe P) is also a slope 13 of about 45 °.
As b (10b), the respective slopes are brought into contact with each other, and the centers thereof are rotatably connected by a pin 18.

Therefore, the slide tube 15 (1
2) Move the support tube 13 as shown in Fig. 19 after moving it.
When the (handrail pipe 10) is bent in the direction of the arrow from the two-dot chain line state to the solid line state, the slope 13b (10b) of the support pipe 13 (handrail pipe 10) becomes the slope 4a (8a ₁ ) of the bearing shaft 4 (8). On the other hand, the pin 18 rotates while sliding around the pin 18, and finally becomes the state of the alternate long and short dash line in a state of being bent approximately 90 ° with respect to the bearing shaft 4 (8) (the 17th line).
See also figure).

FIG. 20 shows another embodiment in which a screw 19 is fixed to the slope 13b (10b) instead of the pin 18 and screwed into a screw hole provided in the slope 4a (8a). In this case,
In the straight line state shown in Fig. 20, the support tube is
As 13 (handrail pipe 10) is firmly fixed, slide pipe 15
(12) can be omitted.

FIG. 21 shows a state in which the support pipe 13 (handrail pipe 10) is bent at 90 °, and a gap is formed between both slopes 4a (8a) and 13b (10b).

In the above embodiment, of the pair of handrail pipes 10 and support pipes 13,
If at least one of them is standing as shown by the solid line in FIG. 17, the curing lid 5 will never fall down, and conversely, if it is folded as shown by the phantom line, the curing lid 5 will not fall. It is stable and easy to fall down, and the opening is closed so that accidents such as falling will never occur.

Incidentally, the stepped frame 2 is fixed to the anchor sleeve 21 embedded in the slab 20 by the fixing bolt 22 as is apparent from FIG. The stepped frame 2 also serves as a mold, and the anchor sleeve 21 is screwed to the anchor bolt 23, and the level L is adjusted before the concrete of the slab 20 is poured. 24 is a slab formwork.

The opening of the present invention is not limited to a square shape, but may be a rectangular shape or the like. Therefore, the base frame and the curing lid can be formed in any shape according to the shape of the opening.

Further, according to the present invention, each member (part) can be replaced as a single item when it is damaged.

Furthermore, a chain or the like may be hung between the curing lid and the support tube.

[Advantages of the Invention] (1) By simply operating the handrail pipe and the support pipe, the curing lid can be opened and closed easily and quickly, and at the same time the curing lid can be opened and the handrail can be reliably set. , You can safely go in and out, and when the lid is closed, the handrail is also stored at the same time so that it does not interfere with your work.

(2) Since the opened curing lid is held by the handrail pipe and the support pipe, a special means for holding the curing lid can be omitted.

(3) Not only can the handrail pipe be used to safely enter and leave the slab opening, but the handrail pipe can also serve as a safety column even when the slab is opened to prevent falling.

(4) Since the stepped base frame can be easily removed, it can be reused.

(5) Due to the stepped base frame, the inner side surface of the slab opening is well finished, the mold release is easy, and the inspection port can be easily attached.

[Brief description of drawings]

1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a plan view of a stepped base frame, FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 2, and FIG. IV-IV enlarged sectional view, FIG. 5 is an enlarged sectional view taken along VV in FIG. 2, FIG. 6 is a plan view of the curing lid, FIG. 7 is a side view of the curing lid, and FIG.
6 is an enlarged sectional view taken along line VIII-VIII of FIG. 6, FIG. 9 is an enlarged sectional view taken along line IX-IX of FIG. 6, and FIG. 10 is taken along line XX of FIG.
FIG. 11 is a side view of the connecting portion between the handrail pipe and the support pipe, FIG. 12 is a side view of the connecting portion between the support pipe and the reinforced handrail pipe, and FIGS. 13 (A) and (B). ) Is a plan view and a side view of the lock portion of the reinforced handrail pipe, FIG. 14 is an explanatory view in which the reinforced handrail pipe is folded and set on the support pipe, and FIGS. 15 and 16 are explanatory views showing the operation, respectively. The figure is an overall side view of another embodiment,
FIG. 18 is an enlarged explanatory view of the connecting portion of FIG. 17, FIG. 19 is a functional explanatory view, FIG. 20 is a sectional view of an embodiment in which a screw is connected, FIG. 21 is a sectional view in a bent state, and FIG. The figure is an enlarged sectional view of the inner edge of the slab opening. 1 ... Slab opening, 2 ... stepped base frame, 3
…… Support piece, 3a …… Shaft, 4 …… Support shaft, 4a …… Slope, 5
...... Curing lid, 6 ...... Wire mesh, 7 ...... Locking piece, 8 ...... Bearing shaft, 8a ...... Slope, 9 ...... Leg, 10 ...... Handrail tube, 10a ...... Connecting piece, 10b ...... Slope, 11 …… Universal joint, 1
2 …… Slide tube, 13 …… Support tube, 13a …… Coupling piece, 13b
…… Slope, 14 …… Universal joint, 15 …… Slide tube, 15a …… Lock shaft, 16 …… Reinforced handrail tube, 16a ……
Pin, 17 ... Latch, 17a ... Hole, 18 ... Pin, 19 ...
Screw, 20 …… Slab, 21 …… Anchor sleeve, 22 ……
Fixing bolt, 23 …… Anchor bolt, 24 …… Slab formwork, L …… Level.

Claims (1)

[Claims] 1. A stepped base frame attached to the inner peripheral edge of a slab opening, a curing lid pivotably attached to one side of the stepped base frame, and a handrail pipe bendably attached to the curing lid. And a supporting tube foldably attached to the other side of the base frame, and the handrail tube and the other end of the supporting tube are foldably connected to each other. Lid device.