JPS6317962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of laying synthetic resin square plates outdoors.

Synthetic resins have a large coefficient of thermal expansion. Therefore, if synthetic resin boards are spread outdoors, the degree of expansion will be different between the areas exposed to sunlight and the areas not exposed to sunlight. When the synthetic resin plate is small or the area covered is small, the difference in the degree of expansion does not matter much. However, as the area increases, the difference becomes more apparent, and only the areas exposed to sunlight swell. Therefore, it was necessary to invent a method of spreading synthetic resin boards over a wide area outdoors to prevent them from swelling up.

In fact, to improve drainage of tennis courts, square boards made of synthetic resin are laid all over the tennis courts. The synthetic resin board in this case has a net-like structure to improve drainage, and supports are attached here and there on the back surface. This structure is attached with the net-like material on the surface floating above the ground or floor surface. In such a state, it is necessary to spread the synthetic resin plate so that it does not bulge even if it partially expands. This invention is
This was done in response to this need.

In this invention, in order to conveniently connect square plates made of synthetic resin to each other, connecting rings are protruded from two adjacent edges out of four edges, and connections are made to the remaining two adjacent edges. It is assumed that unit plates are used which can be connected to each other by attaching projections and fitting the projections into rings. In this case, in order to allow thermal expansion of the unit plate, the inner cavity of the ring is made into an ellipse extending in a direction perpendicular to the edge, and the protrusion that fits into this is made approximately along the short axis of the ellipse. It is made into a cylindrical shape with a corresponding diameter, so that when the protrusion is fitted into the ring, the connected unit plate can move in the connecting direction, but cannot move in the direction perpendicular to this. Make it the gist. Furthermore, this invention
Two types of rectangular plates, large and small, are prepared, and the part exposed to sunlight is composed of a mixed arrangement of large unit plates and small unit plates, and the connected rows of small unit plates are exposed to sunlight. The main idea is to penetrate the irradiated area vertically or horizontally.

In this invention, when laying synthetic resin square plates outdoors, connection rings are provided protruding from two adjacent edges of the square plates, and the inner cavity of the rings is made into an oval shape that is long in the direction perpendicular to the edges. A unit plate is one in which cylindrical protrusions with a diameter approximately corresponding to the short axis are attached to the remaining two edges.Two types of unit plates, large and small, are prepared, and the two sides of the small unit plate are attached to the two sides of the large unit plate. The length is an integral fraction of the side, and two types of unit plates, large and small, are mixed and arranged in the sunlight-irradiated area, and the protrusion of the adjacent unit plate is fitted into the ring of each unit plate, and the area where the small unit plate is installed is The present invention relates to a method of laying square plates made of synthetic resin plates, characterized in that the square plates are placed through the sunlight-irradiated portion in the vertical or horizontal direction.

The method of this invention will be explained with reference to the drawings as follows. Fig. 1 is a plan view of a large unit plate used in the method of this invention, Fig. 2 is a plan view of a small unit plate used in the method of this invention, Fig. 3 is a back view, and Fig. 4 is a plan view of a small unit plate used in the method of this invention. One end is an enlarged sectional view, FIG. 5 is a partially cutaway plan view showing the connection state of small unit plates, and FIG. 6 is a partially cutaway plane when two types of unit plates, large and small, are laid out according to the method of the present invention. Figure, 7th
The figure is a plan view showing the arrangement of small unit plates.

In FIG. 1, L is a large unit plate, which is a right-angled plastic tile. This tile-like object has a mesh-like structure, and the holes 2 are formed between the meshes 1. A plurality of rings 3 are provided laterally protruding from the outer periphery of two adjacent edges. An elliptical through hole 4 is formed inside the ring 3. The major axis of an ellipse is perpendicular to the edge, and it is elongated in that direction. On the back side of the remaining two edges, there are cylindrical projections 5 as will be described later regarding small unit plates.
However, struts 6 and 7 are attached to the back surface of the mesh portion, so that the mesh is maintained in a floating state.

In FIG. 2, S is a small unit plate, which is a right-angled plastic tile-like object. One side of the small unit plate S is an integer fraction of the large unit plate L. To be more specific, the second small unit plate S
is the length of the horizontal side of the large unit plate L shown in Figure 1 when four pieces are lined up in the horizontal direction, and the side length of the large unit plate L in the vertical direction when two pieces are lined up in the vertical direction. There is.
In addition, the small unit plate S is similar to the large unit plate L,
It is configured in a mesh shape and includes a mesh 1 and through holes 2, and a ring 3 protrudes from the outer periphery of two adjacent edges, and the ring 3 is provided with an elliptical through hole 4.

The small unit plate S is provided with a cylindrical projection 5 on the back surface as shown in FIG. The protrusion 5 is attached at a position where it fits into the through hole 4 of the adjacent unit plate. As shown in an enlarged view in FIG. 4, the protrusion 5 has a tubular shape and gradually becomes thicker from the base to the tip, but at the tip, the protrusion 5 tapers. Protrusion 5
The outer shape is approximately cylindrical, and the average diameter of the outer side thereof is approximately equal to the short axis of the elliptical through hole 4 of the ring 3. As mentioned earlier, such a protrusion 5 is also provided on the back surface of the large unit plate L.

As mentioned earlier, the unit plates L and S are provided with the protrusions 5 on their back surfaces as well as supports 6 and 7 at the intersections of the meshes 1. The support column 6 has a larger outer diameter than the support column 7, and is slightly higher in height. The struts 6 and 7 are attached alternately to the intersections of the mesh 1. Therefore, when the unit plates L and S are placed with the supports 6 and 7 facing downward, the net-like material is maintained in a floating state by the supports 6 and 7.
Therefore, it has good drainage. Moreover, since there is a slight difference in outer diameter and height between the columns 6 and 7, the netting can be curved until the lower column 7 touches the ground or floor surface, thus exhibiting a suitable degree of elasticity. It happens.

In the method of this invention, unit plates as described above are laid out in areas that are exposed to sunlight and areas that are not exposed to sunlight. At this time, as shown in FIG. 6, the protrusion 5 of another unit plate is brought close to the ring 3 of one unit plate, and the protrusion 5 is fitted into the ring 3. Then, since the diameter of the protrusion 5 is almost equal to the short axis length of the ellipse of the through hole 4, even though the unit plate can move in the connection direction,
You will not be able to move in a direction perpendicular to this. Specifically speaking about this in the drawing, the adjacent unit plate L
-1 and L-2 are connected with room for movement in the connection direction a, forming a gap 8 there. However, b, which is perpendicular to arrow a,
In the direction, unit plates L-1 and L-2 are connected so as not to be movable. Therefore, if a difference in expansion occurs between the unit plates L-1 and L-2, distortion in the b direction will occur.

Therefore, the present invention interposes small unit plates S-1 to S-8 between unit plates L-2 and L-3, as shown in FIG. Each side of the small unit plates S-1 to S-8 is similar to the large unit plate L-.
Since it is an integer fraction of 2 and L-3, one large unit plate L can be replaced with a small unit plate S. Moreover, each of the small unit plates S-1 to S-8 is the large unit plate L-2 or L-
It has the same protrusion 5 and ring 3 as 3. Moreover,
The protrusion 5 and ring 3 on the small unit plate are located in a place where they fit together when adjacent to the large unit plate. Therefore, one large unit plate L can be replaced with several small unit plates S and connected to each other.

According to the method of this invention, as shown in FIG. 6, when small unit plates S-1 to S-8 are interposed between large unit plates L-2 and L-3, unit plates L-
Since there is a gap 9 between unit plates S-1 and S-5 between unit plates S-2 and L-3, it is possible to move in the direction b. Therefore, the difference in expansion in the b direction is absorbed between unit plates L-2 and L-3,
Strain in the b direction no longer appears. Originally, as mentioned above, it is movable and no strain appears in the direction a, so by absorbing the strain in the b direction described above, no strain appears in any direction.

This invention method is applicable to small unit plates S as described above.
penetrate vertically or horizontally in the sunny area. This means that, as shown in Figure 7,
Assuming that the shaded portion C is exposed to sunlight, this means that the small unit plates S are arranged so that the small unit plates S extend through the portion C in the vertical or horizontal direction.

Note that when one side of the small unit plate S is an integer fraction of one side of the large unit plate L, it means that the gap 9 between the small unit plates is also included. Add this to the 6th
To explain the diagram in detail, small unit plate S-1
The side of the small unit plate is that the total side length when the four pieces S-4 are connected by fitting the protrusion 5 and the ring 3 is equal to the length of one side of the large unit plate L. This means that the length is one quarter of the side length of the large unit plate.

Further, as the synthetic resin, polyethylene, polypropylene, etc. can be used.

According to the method of this invention, since the lengths of the two sides of the small unit plate are each an integer fraction of the length of the two sides of the large unit plate, it is easy to place one large unit plate at the required location. can be replaced with several small unit plates. Moreover, both the small unit plate and the large unit plate have connecting rings protruding from two adjacent sides and protrusions on the remaining two sides, so they can be easily connected to each other by fitting the protrusions into the rings. You can connect and go. Furthermore, since the ring is elliptical and long in the direction perpendicular to the edges, the result of the connection is one that can move slightly in the direction of the connection, but not in the direction perpendicular to it, and therefore in a constant direction. You can reliably connect to. At the same time, a certain degree of expansion and contraction is allowed between the connected unit plates. Furthermore, since we decided to place the small unit plates in the areas exposed to sunlight, expansion and contraction would be allowed in directions that could not be moved between the large unit plates. It is possible to prevent distortion between the plates.
Moreover, since the small unit plate is arranged to extend vertically or horizontally through the sunny area, expansion and contraction can be surely allowed in that area. As a result, there is an advantage that distortion caused by sunlight does not appear at all.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a large unit plate used in the present invention, Fig. 2 is a plan view of the same small unit plate, Fig. 3 is a back view, and Fig. 4 is an enlarged sectional view of one end of the unit plate. Fig. 5 is a partially cutaway plan view showing the connection state of small unit plates, Fig. 6 is a partially cutaway plan view when two types of unit plates, large and small, are laid out according to the present invention, and Fig. 7 is a partially cutaway plan view showing the connection state of small unit plates. FIG. 3 is a plan view showing the arrangement of unit plates.

Claims (1)

[Claims] 1 When laying synthetic resin square plates outdoors, connecting rings are protruded from two adjacent edges of the square plates, the inner cavity of the rings is shaped like an ellipse that is long in the direction perpendicular to the edges, and the short axis of the ellipse is Add cylindrical protrusions with approximately equivalent diameters to the remaining two edges and use these as unit plates. Prepare two types of unit plates, large and small, and make the two sides of the small unit plate the same as the two sides of the large unit plate. The length is a fraction of an integer, and two types of unit plates, large and small, are mixed and arranged in the area exposed to sunlight, and the protrusion of the adjacent unit plate is fitted into the ring of each unit plate, and the part where the small unit plate is installed is A method for laying synthetic resin rectangular plates, characterized by passing through the sunlight-irradiated area in the vertical or horizontal direction.