JPH0426591Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a temporary stopper for temporarily sealing a piping opening provided in the concrete floor of a building under construction until the piping work begins. Regarding.

(Conventional technology) In reinforced concrete buildings under construction,
At the stage of pouring concrete for floors, walls, etc., numerous openings for various types of piping and wiring are prepared in advance. These openings range in diameter from several centimeters to several tens of centimeters.
Depending on the size of the building, they usually range from hundreds to thousands. Due to these openings, during rainy weather, rainwater from the upper floors flows into the lower floors, and water accumulates on the floor, which interferes with construction work, so it must be constantly drained using pumps, etc. There is also a risk that construction materials, tools, or personnel may fall through these openings to the floors below.

Therefore, in order to stop rainwater from falling through such an opening in the floor and to prevent danger to workers, conventionally the opening was covered from above with a plywood board, etc. that was larger than the opening, and the area around the plywood board and the floor was covered. Work was being done to secure the surfaces with duct tape, etc. but,
It is difficult to seal the opening watertight with such plywood and packing tape, and if water accumulates on the floor, water may seep in from between the plywood and the floor and come out from the opening. Water will fall to the floor below, and water will accumulate on the floor below. Additionally, depending on the strength of the plywood, there was a risk that it would be damaged by the impact of heavy construction materials, tools, etc., or that workers might trip on it. Furthermore, the work of attaching plywood covers with duct tape to a large number of openings with different dimensions, and removing them during piping, not only requires a large amount of manpower and time and is complicated, but also significantly reduces the efficiency of construction work. It was a hindrance.

(Problems to be solved by the invention) The object of the invention is to provide a temporary stopper that watertightly seals an opening in a concrete floor during construction work and is easy to install and remove.

(Means for solving the problem) The temporary stopper for concrete floor openings of the present invention has a sufficient size to cover the piping opening, and has an upper support plate with reinforcing material embedded inside, and an upper support plate that is large enough to cover the pipe opening. It consists of a cylindrical side wall made of an elastic material and having an outer circumferential wall that protrudes downward from the lower surface of the plate and is in close contact with the inner circumferential wall of the opening.

(Example) FIG. 1 is a longitudinal sectional view of a temporary stopper of the present invention, and FIG. 2 is a plan view. The temporary stopper is integrally molded from an elastic material such as rubber, and its upper support plate 1 has an internal shape of any shape such as a square or circle that is large enough to cover the opening 6 in the concrete floor during construction work. An iron plate 3 is embedded as a reinforcing material, and a large number of anti-slip protrusions 4 are provided on the surface. The hollow cylindrical side wall 2 projects downward from the lower surface of the upper support plate 1, and its lower tip is slightly tapered for convenient insertion into the opening 6. The diameter of the hollow cylindrical side wall 2 is slightly larger than that of the opening 6, so that the outer peripheral surface of the cylindrical side wall 2 comes into close contact with the inner peripheral surface of the opening 6 with elasticity. In order to ensure this close contact, a small number of protrusions 5 may be provided to surround the outer periphery of the cylindrical side wall 2 in a ring shape. Also,
The depth of the cylindrical side wall 2 may be approximately equal to the thickness of the opening 6.

To attach a temporary stopper to the opening 6, a temporary stopper having a size specified by the diameter of each opening 6 is pushed into the opening 6 with its lower tip 2a facing down. Since the outer diameter of the cylindrical side wall 2 is slightly larger than the inner diameter of the opening 6, the cylindrical side wall 2 is compressed and comes into close contact with the inner peripheral surface of the opening 6 due to its elasticity. Note that a protrusion 5 is provided on the outer periphery of the cylindrical side wall 2.
If this part is provided, even stronger pressure will be applied to this part.

As a result, even if rainwater or construction water accumulates around the opening 6 and water infiltrates between the lower surface around the upper support plate 1 and the concrete floor surface around the opening 6, the opening The outer circumferential surface of the cylindrical side wall 2 which is in close contact with the inner circumferential surface of the portion 6 also reliably prevents further water from entering.

In addition, when piping work for the opening 6 is started, a suitable thin board is inserted between the lower surface of the concrete floor around the upper support plate 1, and the peripheral part of the upper support plate 1 is held and pulled up. This allows it to be pulled out easily.

In addition, the iron plate 3 embedded in the upper support plate 1 as a reinforcing material can withstand even if tools, construction materials, etc. fall onto the upper support plate 1, or even if a worker stands on the top support plate 1. . Further, the projections 4 on the surface of the upper support plate 1 prevent the worker from slipping and falling on the upper support plate 1.

(Effects of the invention) The temporary stopper is made of an elastic material, and the outer circumferential surface of its cylindrical side wall elastically adheres to the inner circumferential surface of the opening in the concrete floor, so water that has accumulated on the floor will not flood. You can reliably prevent it from falling. In addition, the upper support plate is large enough to cover the opening and has reinforcing material embedded inside, so even if tools or construction materials fall onto it, it will not be damaged, and workers can It's safe to ride. Furthermore, the temporary stopper can be easily and quickly attached to and removed from the opening, making the construction process shorter and more efficient than before. Further, the temporary stopper can be used many times and is therefore economical.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view of an embodiment of the temporary stopper of the present invention, and FIG. 2 is a plan view. In the figure, 1... upper support plate, 2... hollow cylindrical side wall, 3... reinforcing material, 6... opening in concrete floor.

Claims (1)

[Scope of utility model registration request] an upper support plate large enough to cover the pipe opening provided in the concrete floor; and a cylindrical shape made of an elastic material that protrudes from the lower surface of the upper support plate from below and has an outer diameter that matches the inner diameter of the opening. Temporary stopper for concrete floor openings consisting of side walls.