JPH0422757Y2 - - Google Patents

Description

[Detailed explanation of the invention] This utility model is applicable to tennis courts and gateball. This relates to waterproofing during rain in relatively flat places such as playing fields.

Conventional tarpaulin sheets are foldable, which is inconvenient and requires manpower to handle, and rainwater runs off from around the sheet.

This project was devised to eliminate this drawback, and is a waterproof sheet that is characterized by a structure in which the waterproof sheet is shaped into a belt and can be rolled up like a roller.

To explain this with reference to the drawings, (a) A dike 3 made of elastic material such as urethane is provided at the tip of the waterproof sheet 5 rolled up in the form of a roller, and this has a drainage hole to naturally drain accumulated rainwater. 4
Embed.

(b) Provide elastic embankments 1 at both lateral ends of the tarpaulin sheet to prevent rainwater from flowing out.

This embankment has a structure that swells when the sheet is unfolded and used, and shrinks flat due to the compressive force when the sheet is rolled up.

(c) Between both lateral ends of the tarpaulin sheet, for example, a light cushion material 2 in the form of a strip is pasted on the back or front side of the sheet at intervals of several tens of centimeters in the length direction of the tarpaulin sheet.

This is to prevent the sheet from twisting when it is rolled up, and to compensate for the difference in thickness between the two ends so that it can be rolled up like a roller.

The waterproof sheet of the present invention is characterized by the above-mentioned structure, and therefore can be easily rolled up, making its handling simple.

The method of using this invention is to refer to the weather forecast and roll the proposed roller-shaped sheet from the lower part of the ground to the higher part before it rains.

Line up a number of them depending on the size of the ground, and connect a hose to the drainage outlet at the end of the tarpaulin so that it flows into the side ditch near the joint.

When the rain stops, the remaining rainwater on the sheet is washed away and rolled up, the end of the winding is fixed to the winding core, and the sheet is stored in a storage rack.

In this way, it becomes possible to enjoy the scheduled competition immediately with easy operation, and the troublesome waterproofing work of conventional foldable tarpaulins can be eliminated.

In addition, to mention the second and third embodiments of this proposal, (a) The embankment 1 is made of an L-shaped nylon resin diagram A with repulsive force as shown in Figure 3, a spring diagram B embedded in a sponge, and an L-shaped embankment. spring. A possible method is as shown in Figure C, in which a number of pins are lined up and embedded in vinyl or the like.

Large tarpaulins can also be made into bags and filled with air to create a dike-like structure.

(b) Instead of winding up the tarpaulin sheet by hand, you can also push it by attaching a handle to the winding core as shown in Figure 4.

(c) Softball. When waterproofing large areas such as playing fields, the proposed tarpaulin sheet can be made larger and mounted on a special winding truck to efficiently waterproof large areas.

(d) If it is a flat surface, this project can be used not only for waterproofing but also for surface protection for other purposes.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the proposed waterproof sheet. FIG. 2 shows a sectional view taken along line A-A' in FIG. Figure 3 shows embankment 1
An example of providing elasticity is shown in an enlarged view. Fig. 4 shows a manual handle type, Fig. 5 shows an example of rolling it up flat, and Fig. 6 shows an example of a storage rack. 1 is a resilient structure embankment, 2 is a cushion material, 3 is a
is the tip of the embankment, 4 is the drain, and 5 is the waterproof sheet.

Claims (1)

[Scope of utility model registration request] The belt-shaped tarpaulin sheet had elastic embankments 1 at both lateral ends, and light cushioning material 2 was affixed between both lateral ends at intervals of several tens of centimeters in the length direction. A waterproof sheet characterized by: