JPH0246739B2 - - Google Patents

Description

[Detailed description of the invention]

B. Purpose of the invention (industrial application field) This invention relates to an auxiliary floor used to make the bottom of the pool shallow when children are allowed to swim in an adult pool, and when cleaning under the auxiliary floor. This invention can be used as an auxiliary floor that allows for easy lateral movement. (Prior art) Adult pools (usually 1.1 to 1.2 m deep) are too deep and dangerous for young children to swim in, so an auxiliary floor is submerged in a part of the pool. What is being done is to make the bottom shallower. For example, as shown in FIG. 4 (plan view of the pool), an auxiliary floor A is provided in about 1/3 of the width of the pool 1, and the depth of this part is about 70 cm. The auxiliary bed has a length of 2, as illustrated in Figures 5-6.
It is constructed by arranging small flooring materials 2 with a width of about 1 m and a width of about 1 m. The flooring material 2 illustrated here has six leg pieces 2b protruding from the bottom surface of a top plate 2a, is made of fiber reinforced resin (FRP, specific gravity 1.5), and each piece weighs 35
Kg. If we use this floor material 2 to build an auxiliary floor A with a width of 4 m on one side of a 25 m pool as shown in Figure 4, we will need 50 pieces of floor material, and their total weight will be 1750 m.
Kg. (Problem to be solved by the invention) The bottom of the pool must be cleaned every week, but since there are many leg pieces 2b under the auxiliary floor A installed as described above, it is difficult to clean the bottom of the pool. I can't. In addition, to remove auxiliary floor A from the installation position, it is sufficient to disassemble the auxiliary floor into flooring material 2, but since adjacent flooring materials are usually tied together with wire at several places, this is necessary. However, it is impossible to reassemble the pool after cleaning it because it requires a lot of effort and time. Furthermore, if it is attempted to move the flooring 2 while connected, a large number of people will be required to move the entire heavy auxiliary floor at once as described above. Further, even if mechanical power such as a winch is to be used, it is often difficult to install such a machine beside a pool, and the operator is often at risk of injury. B. Structure of the Invention (Means for Solving Problems) In this invention, an elongated cylindrical floating bladder is attached in advance under the auxiliary floor, and when the auxiliary floor is fixed, the air in the bladder is removed. When moving, the auxiliary floor is constructed so that air is injected into the swim bladder to inflate it, and the buoyant force causes the auxiliary floor to rise above the bottom of the pool, allowing it to be moved laterally while floating on the water. (Function) When the valve installed at one end of the elongated cylindrical swim bladder installed under the auxiliary floor is opened and air is injected with a compressor, the swim bladder expands and generates buoyancy.
Since the entire auxiliary floor is raised, it can be pulled with a light force and moved to the other side of the pool. Next, open the valve to release the air inside the swim bladder.
As the swim bladder is compressed by the water pressure and loses its buoyancy, the auxiliary floor sinks and is placed on the bottom of the pool, allowing infants to swim safely on the moved side, or under the auxiliary floor. You can clean hot places. By doing this alternately, you can always clean the bottom of the pool and keep it clean. (Example) Figures 1 to 3 show an elongated cylindrical swim bladder and a state in which the auxiliary floor B of the present invention is constructed by attaching this to a floor material. Figure 1 is a partial side view of the swim bladder, and Figure 2 is a FIG. 3 is a side view showing the state where this is attached to the flooring material, and FIG. 3 is a plan view of the pool in which this is installed. The same reference numerals are used for parts equivalent to those of the conventional auxiliary floor A shown in FIG. In this embodiment, four slender cylindrical swim bladders 3 are connected to form a length twice the length of the pool (25 m), which is folded back at the center to form two swim bladders. They are arranged in parallel shapes. The two swim bladders 3, 3 have air pipes 4a provided at their ends,
4a can be connected at the joint 5 for communication.
One air pipe 4b at the outermost end of the swim bladders connected in this way is connected to a compressor. The other outermost air tube is occluded. A triangular flap 6 is glued to the side surface of the swim bladder 3 at its base 6a, and an eyelet hole 6 provided in the flap is attached.
A wire 7 (or string) is passed through b and tied to a small hole provided in the lower surface of the connected flooring materials 2, 2, as shown in FIG. Auxiliary floor B with floating bags 3, 3 attached in this way
When the swim bladder is deflated without injecting air, there is no buoyancy and the pool sinks into the water, and the bottom of the pool is formed at a depth of about 70 cm by the top plate 2a supported by the legs 2b. When air is injected from the air pipe 4b by a compressor, the four floating bladders expand and increase their volume, and the resulting buoyancy causes the entire auxiliary bed to float on the water surface. Then, you can pull the auxiliary floor sideways and lightly move it to the other side of the pool, then let the air out of the swim bladder and let the auxiliary floor sink, allowing you to install a new auxiliary floor at this location. Although the bottom of the pool is sloped toward the drain, the slope is gentle, so no matter which side of the pool floor the flooring material with legs 2b of equal length sinks, the slope of the top plate 2a can be small. An auxiliary floor can be used in almost the same way as when the top plate is horizontal. Thereafter, the pool bottom at the old position of the auxiliary floor B can be easily cleaned. 1 piece of flooring material 2 (length 2m, specific gravity 1.5, weight 35Kg)
The underwater weight Ww of , where Wa is the weight in the air and K is the specific gravity, is Ww = K-1/KWa, so the underwater weight of one flooring material 2 is calculated from the above equation.
It becomes 11.7Kg. When the diameter of an elongated cylindrical swim bladder is changed, the change in buoyancy due to expansion per 2 m of the swim bladder is calculated as shown in the following table. In this table, the safe buoyancy is a conservative buoyancy with a safety factor of 1.3 taking into account the decrease in buoyancy due to water leakage into the swim bladder.

[Table] In order to float the floor material 2, which weighs 11.7 kg underwater, the diameter of the float bladder should be 10 cm or more. As the material of the swim bladder, flexible, watertight, and durable materials such as rubber, rubberized canvas, and soft resin can be used. In addition, one end of the flooring material is pivoted to one side of the pool, and the floating bladder is used to swing the flooring material up and down, so that the flooring material is positioned close to the bottom of the pool and parallel to the water surface. The invention of an auxiliary floor for a swimming pool is described in Japanese Patent Application Laid-Open No. 55-92477, in which the auxiliary floor is pivoted at a fixed position on one side of the pool and is raised by a float bladder when in use. However, the structure and operation are different from those of the present invention, and it is difficult to clean the bottom of the pool. C. Effects of the Invention The auxiliary bed B of the present invention configured and operated as described above has the following effects. (1) It can be constructed by simply attaching the elongated cylindrical floating bladder 3 to the auxiliary floor A, which is a combination of conventional flooring materials 2. (2) By filling the float bladder 3 with air using a compressor, the auxiliary bed can be floated and easily moved laterally. (3) It is also possible to sink the floating auxiliary bed B,
It is easier to remove the air. (4) Since the auxiliary floor body is floated and moved all at once, it can be moved by a small number of people. (5) There is no need to install a winch that could cause injury, making the equipment simpler.

[Brief explanation of the drawing]

Figures 1 to 3 show examples of the present invention. Figure 1 is a side view of an elongated cylindrical swim bladder, Figure 2 is a side view of a flooring with a swim bladder attached, and Figure 3 is a side view of a floor material with a swim bladder attached. FIG. 4 is a plan view of a pool equipped with a conventional auxiliary floor A, FIG. 5 is a perspective view of the flooring material,
FIG. 6 is a plan view of the flooring material. 1: Pool, 2: Floor material, 2a: Top plate, 2b: Leg piece, 3: Swim bladder, 4a, 4b: Air pipe, 5: Joint, 6: Flap, 6a: Base, 6b: Eyelet hole, 7: Wire, A, B: Auxiliary floor.

Claims (1)

[Claims] 1. In an auxiliary floor for a pool that makes a part of the pool shallow, which is constructed by combining flooring materials 2 heavier than water with a plurality of legs 2b of equal length protruding from the lower surface of the top plate 2a,
A floating bladder 3, which has an airtight flexible elongated cylindrical shape and is equipped with a valve to freely supply and discharge pressurized air, is attached to the underside of the flooring 2 through between the legs 2b, and the floating bladder 2 is filled with air to float. An auxiliary pool floor that can be easily moved laterally within the pool.