JP3227544U - Perforated resin floor board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin floor plate structure capable of draining water accumulated in a rut formed by a truck tire during traveling and maintaining a load capacity on a ground having a weak bearing capacity.
SOLUTION: In a resin floor plate in which two resin floor plates are laid in two rows on soft ground and water accumulated in ruts formed on the marks of car tires can be drained in rainy weather, three rows or four rows in the vertical direction. The drain holes 1d are provided, and the center of the vertical arrangement of the holes is the center of the resin floor plate, and the arrangement width of the holes is inside the tire width of the small 2-ton truck. By minimizing the number of holes, the bending strength of the resin floor plate is prevented from decreasing. Further, even if the N value of the ground is 2 or more, the area of the hole in the ground contact portion of the tire is set to 10% or less so that the resin floor plate does not sink during running.
[Selection diagram] Fig. 6

Description

In the present invention, when a truck runs on a resin floor plate, if the base is soft, the resin floor plate can be rutted. When it rains, puddles form on the ruts. The present invention relates to a resin floor plate provided with a plurality of drain holes in order to drain the accumulated water.

Instead of the iron plate and concrete formwork that were conventionally used for soft ground such as temporary sites, temporary cost evacuation sites, and agricultural work sites, it is light and elastic in recent years, flexibly withstands bending and steps on the curing surface, and for a long period of time. Resin floorboards that can withstand repeated use have come to be used.

The resin floor plate is highly elastic and can flexibly withstand the bending of the curing surface. On the other hand, if the base on which the resin floor plate is laid is soft when the truck is running, the ruts of the tire marks of the truck can be formed on the resin floor plate. When it rains, water collects in the ruts. Further, if a rut is formed on the resin floor plate laid in the water place, there is a problem that the water accumulated in the rut cannot be drained.

Although there are no holes in a general resin floor plate, there are three similar products as non-patent documents 1, 2, and 3 as perforated floor plates. Both types have holes that penetrate the entire floor plate, and rather than draining water, they are more of a function to reduce weight, prevent tires from slipping, and prevent the floor plate from slipping against the ground.

Since the perforated floor plate has a large perforated area, it is possible to reduce the weight, but on the other hand, in the ground having a weak ground bearing capacity such as soft ground, the load bearing capacity is not sufficiently maintained by the floor plate.

Mitsubishi Chemical Infratec Co., Ltd. "Resin floor board Shikiraku" [Searched on November 7, 1945] Mitsubishi Chemical Infratec Co., Ltd. Internet <URL: https: // www. mp-infratec. co. jp / contact2 / index. php? code = E09C> Kojiban Co., Ltd. "Three-dimensional anti-slip" [Searched on November 7, 1st year of Reiwa] Kojiban Co., Ltd. Internet <URL: https: // www. kojiban. jp /> LINK PLANET Co., Ltd. "PSKA", "PSLA" [Searched on December 13, 1st year of Reiwa] LINK PLANET Co., Ltd. Internet <URL: http: // www. linkplanet. co. jp / product / psla. html>

A drainage function is added to the resin floor plate so that even on soft ground and other ground with weak bearing capacity, water that collects in the ruts formed by the tires of the truck can be drained when the truck is running.

The drainage function and load capacity can be maintained by making the size of the holes to be drilled in the floor plate as small as possible and minimizing the number of holes so that the load capacity can be sufficiently maintained by the perforated resin floor plate. It is to provide a resin floor board.

In view of the above technical problems, the present invention provides a resin floor plate that retains the drainage function of ruts formed on the tire traces of a truck and the load capacity of the truck.

This is solved by providing a hole in the rut that is created when the tire of the truck runs on the resin floor plate when the base plate is soft, and providing a drainage function.
If many holes are provided in the resin floor plate, the bending strength of the entire resin floor plate becomes weak.

Further, it is desirable that the N value, which is one of the indexes indicating the strength of the surface ground when laying the resin floor plate, is 2 or more. This corresponds to the hardness to which one leg does not sink when a person stands on one leg.

Even if the N value of the ground is 2 or more, if the number of holes is large, the resin floor plate may sink. It is important that the number of holes is small and the size of the holes is not too large, because ruts are likely to occur on the soft ground.

From the above, it is desirable that the area of the gap portion in terms of the number of holes and the size of the holes is 10% or less in the contact portion between the resin floor plate and the tire when the tire of the truck travels. This makes it possible to prevent the resin floor plate from sinking at a ground strength of N value 2 or more.

When water collects on a resin floor plate laid on soft ground due to rain or the like on the ruts formed by the traces of a truck running, the accumulated water is collected by the holes provided in the resin floor plate. It comes out to the ground below.

By limiting the size and the number of holes provided in the resin floor plate, the bending strength of the resin floor plate does not decrease.

Further, the resin floor plate does not sink in the ground having an N value of 2 or more.

Top view and side view of a conventional resin floor board A small 2-ton truck that runs on a conventional floor board and a resin floor board Ruts created when a small 2-ton truck runs on a resin floorboard After the truck runs, it rains and the ruts are filled with water. Resin floor plate provided with drainage of the present invention A state in which a small 2-ton truck is running on the resin floor plate of the present invention. A state in which four light trucks are running on the resin floor plate of the present invention. A rut that can be made into a resin floor plate when running on a resin floor plate devised by a small 2-ton truck A state diagram in which well-drained sand is laid on the base board of the rutted floor board. Example of using the resin floor plate of the present invention The left half is a state in which a small 2-ton truck is running, and the right half is a state in which a light 4-track is running. In the usage example of the present invention, a state showing the tire ground contact portion of a 2-ton light truck. In the usage example of the present invention, a state showing the tire ground contact portion of a light 4-track. In the present invention, an embodiment in which holes are provided in plovers (alternately). Case where rainwater collects on a resin floor board without holes A case where rainwater collected on a resin floor plate with holes has escaped

An example of the product of the present invention that solves the above problems is shown below.
FIG. 1 shows a conventionally used resin floor plate 1a. The resin floor plate has holes 1c and the like at the four corners. This is a hole used when fixing a resin floor plate.

FIG. 2 shows a state in which the small 2-ton truck 2a is running on the resin floor plate.
FIG. 3 shows a state in which a rut Aw is formed on the ground A at the trace of the tire 3 after the truck has traveled on the resin floor plate.
FIG. 4 shows a state in which water 4 is accumulated in the rut Aw. It may splash the water as the next truck runs.

FIG. 5 shows one embodiment of the resin floor plate of the present invention, in which holes 1d are provided in three rows at intervals of 1e in the longitudinal direction at intervals of 1f in the central portion of the floor plate. The holes are formed in three to four rows in the center along the vertical direction of the resin floor plate so that the bending strength of the resin floor plate does not decrease.

In consideration of not reducing the bending strength of the resin floor plate, in the embodiment, holes are provided in the resin floor plate having a size of L1 = 1820 mm and L2 = 910 mm at intervals of 1f = 100 mm and 1e = 100 mm. ing. The hole diameter provided is 1d = 20 mm.

The bending strength of the resin floor plate is proportional to the thickness cube and width of the floor plate. It is the width that is affected this time, and if there are many holes provided in the resin floor plate, the width related to the bending strength decreases. In the embodiment of FIG. 6, for example, when the width L2 = 910 mm and the hole size 20 mm of the floor plate are arranged in three rows, the bending strength of the portion with holes is (910-20) as compared with the portion without holes. It can be seen that the bending strength is hardly reduced by × 3) ÷ 910 × 100 = 93%. In the case of four rows, (910-20 × 4) ÷ 910 × 100 = 91%, and there is no decrease in bending strength.

If the hole 1d has a hole about half the width of the floor plate, the bending strength is reduced to 50%. In order to maintain the bending strength of 90% or more, four rows or less are desirable.

Most of the trucks running on the resin floor plate are small 2-ton trucks and light 4-truck trucks.

FIG. 6 shows a state in which the resin floor plates laid in two rows are laid in the center of the tread width 2 at of the small 2-ton truck 2a so as to be approximately aligned with each other. (Tread width is the distance between the center of the contact patch of the left and right tires of the truck)

The distance L3 between the resin floor plates laid in two rows is preferably L3 = about 300 mm in consideration of the tread widths 2 at = 1235 mm and 1240 mm of the small 2-ton truck shown in Table 1.
Table 1 shows the tread width and the tire width of the rear wheels of a small 2-ton truck and a light 4-track.

Two rear tire widths of a small 2-ton truck pass over the holes 1d provided in three rows. The holes 1d provided are in three rows along the vertical direction of the resin floor plate, the width thereof is (1f × 2) of 200 mm, and the width of the tire 3 is 390 mm (Table 1), as shown in FIG. And the water accumulated in the resin floor plate is drained well.

FIG. 7 is a case of a light 4-track. The light 4 truck has a tread width of 1,290 mm to 1,310 mm, which is a little wider than the small 2 ton truck, but the tire width is less than half that of the small 2 ton truck and is narrow, so it passes over the hole 1d provided in the resin floor plate. Will be possible.

In FIG. 9, by laying a water-permeable material B such as sand or gravel in the lower portion of the hole provided in the resin floor plate, the water that has escaped from the resin floor plate can be easily discharged.

FIG. 10 shows the contact area between the small 2-ton truck tire and the tire base plate when the light 4-track tire passes through. Reference numeral 5 denotes a tire trace of a small 2-ton truck, and the portion drawn with diagonal lines is the ground contact portion. 6 is a light 4-track tire trace, and the shaded area is the ground contact area. In this embodiment, L1 = 1820, L2 = 910, L3 = 300 and 2at = 1240.
According to the Bridgestone site, the contact area between the tire and the ground is 100 mm (Ts) x 140 mm for one postcard per tire. The shaded portion 3a in FIG. 11 represents the tire ground contact portion.

FIG. 11 shows a case of a small 2-ton truck, in which three holes 1d provided in a resin floor plate are hung on the tire at a tire ground contact portion. If the tire contact area is postcard width Ts (100) × tire width Tw (390) = 39,000 mm ² and the area of the three holes 1d is 20 mm, the area of the holes is 3.14 × 10 ² × 3 = 942 mm ² , and the ratio to the tire ground contact portion is 942 ÷ 39,000 × 100 = 2.4%.

FIG. 12 shows the case of the light 4, in which two holes 1d provided in the resin floor plate are hung on the tire at the tire ground contact portion. If the tire contact area is Ts (100) × Tw (145) = 14,500 mm ² and the area of the two holes 1d is 20 mm, the area of the holes is 3.14 × 10 ² × 2. = 628 mm ² , and the ratio to the tire ground contact portion is 628 ÷ 14,500 × 100 = 4.3%.

When laying a resin floor board, it is required that the ground has a strength N value of 2 or more, which is obtained by a standard penetration test.
If the ground is soft and the N value is 2 or more, there is no problem in laying the resin floor plate.
In the calculation of the hole area, the area of the hole in the ground contact area of the tire is 2.4% in the case of the small 2-ton truck and 4.3% in the light 4-track, and the hole occupies the resin floor plate. Since the area is very small, the resin floor plate will not sink if the N value is 2 or more. However, when the area of the hole becomes large, the resin floor plate sinks even if the N value is 2 or more.

In the present invention, the area of the holes in the ground contact area of the tire is 2.4% for the small 2-ton truck and 4.3% for the light 4-truck, and the tire of the truck sinks due to the influence of the holes provided. It is possible to drain the water accumulated in the ruts made of tires.

As shown in FIG. 12 as a modification of the present invention, the bending strength of the resin floor plate can be strengthened by setting the positions of the provided holes to two or one.
FIG. 13 shows a case where rainwater collects on a conventional resin floor plate without holes, and FIG. 14 shows a case where rainwater collected on the resin floor plate provided with holes of the present invention escapes. There is.

It can be used for resin floorboards used for temporary members and resin floorboards in the agricultural field.

1a Plan view of the resin floor plate 1b Side view of the resin floor plate 1c Hole for fixing the resin floor plate provided on the resin floor plate 1d Drainage hole provided on the resin floor plate 1e Resin floor plate with a drainage hole Vertical spacing 1f Interval when drain holes are provided in three rows 2a Small 2 ton truck 2at Small 2 ton truck tread 2b Light 4 truck 2bt Light 4 truck tread 3 Small 2 ton truck tire 3a Light truck tire Grounding part with resin floor plate 3b Grounding part between light 4 truck tire and resin floor plate 4 Water accumulated in the ruts of tire marks 5 Tire size of case where small truck ran 6 Light 4 Case where truck ran Tire size Td Tire outer diameter Tw Tire width Ts Tire contact width A Ground for laying resin floor plate B Sand or crushed stone L1 Longitudinal dimensions of resin floor plate L2 Short side dimensions of resin floor plate L3 Made of resin Interval when laying floor boards in two rows

Claims (4)

In order for trucks to run on soft ground, two resin floorboards are laid in two rows, and in the case of rainy weather, etc.
When providing three or four rows of drain holes in the vertical direction on the resin floor plate,
The resin floor plate structure is characterized in that the center of the vertical arrangement of the holes is the center of the resin floor plate, and the arrangement width of the holes is provided so as to be inside the tire width of the small 2-ton truck. An arrangement structure of the resin floor plates according to claim 1, wherein when the resin floor plates are laid in two rows, the two resin floor plates are laid so that the center of the two resin floor plates is the tread width of the truck. .. The first aspect of the present invention is that the drain holes are arranged in three or four rows in the vertical direction along the resin floor plate so that the bending strength of the resin floor plate can be maintained at 90% or more. Resin floor board structure. In claim 1, since the N value of the base plate when the resin floor plate is installed is 2 or more, the area of the drain hole is set within the range of the contact area of the tire with the resin floor plate. A resin floor plate structure characterized in that the area is 5% or less of the area of the resin floor plate.