JPH10266110A - Laying plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laying plate whose load bearing strength is high and firm, and lightweight. SOLUTION: A laying plate 10 laid at a site during construction is provided with constitution laminating a honeycomb material 15 juxtaposing a polygonal hollow column and thin iron plates 11, 13 covering the opening face of the honeycomb material 15. Furthermore, a rubber-made frame body 17 is disposed on the end edge for the laying plate 10, a hole 30 for tool attaching is arranged, and arranged at a position not affected on honeycomb structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laying board which is conveniently laid at a road construction site or the like, and more particularly to a laying board which has sufficient rigidity and load resistance and is lightweight.

[0002]

2. Description of the Related Art Generally, in a road construction site, a slab laid in order to easily repair a dug-up site is made of an iron plate, and has a load strength that can withstand a vehicle weighing approximately 28 tons even when traveling. Was needed. Therefore, the iron plate used weighs 800 kg or more.

[0003]

Since the construction site for road construction and the like is usually wide-ranging, a considerable number of iron plates are required to be laid in an emergency such as at night. In addition, during work, the slabs had to be removed and the work had to be moved out of the way to work. In these handlings, loading and unloading an iron plate having a weight of 800 kg or more on a vehicle was a heavy labor. In addition, as the Road Traffic Law was revised and the weight restrictions on the load of vehicles became stricter, the number of iron plates that could be loaded per vehicle decreased, and the number of transportations increased or the number of vehicles increased. Thus, there was a problem that it was necessary to secure the transport amount of the iron plate. Therefore, the present invention is to provide a durable, lightweight, high-strength flooring board.

[0004]

The laying plate to be simply laid on the construction site in the middle of the construction according to the present invention comprises a honeycomb material having polygonal hollow columns and a thin iron plate covering the opening surface of the honeycomb material. It has a stacked configuration. This slab has a thickness of 5
By making the thickness less than 0 mm and 90% of the thickness of the honeycomb material, the size is the same as that of the conventional spread sheet made of iron plate, but the weight is about 1/4 to 1/3 (2
60 kg or less), the load resistance is 7 t or more, the load resistance is high, and a lightweight laying plate is obtained. Further, the laying plate has a rubber frame at the edge, or a hole for tool attachment is arranged, and the hole is configured at a position that does not affect the honeycomb structure. .

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of a laying board, FIG. 2 is a cross-sectional view taken along line AA, and FIG. The laying plate 10 has a longitudinal dimension L ₁ =
3000 mm, short side dimension L ₂ = 1500 mm, thickness L ₃
= 50 mm. The laying plate 10 is composed of a laying plate main body centered on the honeycomb material 15 and a frame 17 forming a peripheral edge of the main body. The laying plate body is a honeycomb material 15 made up of hexagonal hollow pillars having a height of about 45 mm,
It has a three-layer structure in which surface plates 11 and 13 that cover the opening surface of the honeycomb core are stacked and fixed with an adhesive or the like.

The surface plates 11 and 13 are made of an iron plate having a thickness of about 2.5 mm, and the surfaces thereof are coated with an epoxy-based tar resin or the like, and are subjected to non-slip processing. In the coating process, the coating of the resin is applied twice to surely prevent the corrosion of the surface of the laying board. The honeycomb material 15 is made of an aluminum plate. The hole diameter of the hollow pillar formed in a honeycomb state is approximately 4.8 mm, the thickness (height) is 45 mm, and 90% of the entire thickness of the laying plate 10. It has a thickness dimension. The weight of the honeycomb material 15 of the laying board 10 is 77 kg / m.
^{It is 3} . The frame 17 is a long band formed of rubber.

[0007] At the end portion of the longitudinal center portion of the laying board 10, a mounting hole 30 for lifting equipment such as a rope is provided. A reinforcing plate 20 for reinforcement is provided inside the surface plate 11, 13 at a portion where the lifting tool mounting hole 30 is formed, and has a double structure. The reinforcing plate 20 is bonded and fixed to the core opening surface of the honeycomb material 15 with an adhesive 21.

Next, a method of manufacturing a laying plate will be described. First, a honeycomb plate is formed. An aluminum plate is placed in a large mold, and a vacuum is applied so that warpage and dimensional error are kept within ± 0.05 mm. A plate of a required size is cut from the honeycomb plate. At this time, the honeycomb structure having the hollow column shape is not broken. This is because if the honeycomb structure is damaged at the end of the laying plate, the overall strength of the laying plate 10 is adversely affected. The honeycomb core at the center of one side edge of the honeycomb material 15 is cut in the height direction, and a reinforcing plate 20 made of an iron plate having a square of approximately 200 mm is fixed with the adhesive 21. Surface plates 11 and 13 made of an iron plate are laminated on the upper and lower surfaces of the honeycomb material 15. An epoxy-based adhesive (trade name of Araldite) is applied to each of the surface plates 11 and 13 and the honeycomb material 15, and is positioned and bonded and fixed. At this time, it is put in a vacuum bag to promote the bonding process.

A lifting tool mounting hole 30 is formed in a portion where the reinforcing plates 20 are stacked. At this time, the holes 30 are formed so as not to damage the honeycomb structure of the honeycomb material 15.
For example, assuming that the core size of the honeycomb core is 4.8 mm, the size of the lifting tool mounting hole 30 is 50 mm in diameter, and the core of the honeycomb plate 15 is deleted to be larger than the hole size.
The lifting tool is configured to be supported by a double structure of the upper and lower surfaces 11, 13 and the reinforcing plate 20. A frame 17 made of a rubber body is attached to the peripheral edge of the honeycomb body. Mounting width L ₄ of the frame 17 to 20 mm. Finally, the iron plate 1 of the laying board 10
An epoxy-based tar resin is applied to the surfaces of the first and the thirteenth, sand is applied, and a non-slip process is performed to complete the process.

In order to handle the laying board 10 constructed as described above, a lifting tool such as a rope is attached to the lifting tool mounting hole 30, and the lifting tool is lifted and suspended by a crane.

As described above, the laying plate 10 constituted by covering both sides of the honeycomb material 15 with 90% of the thickness of the laying plate and the iron plate having a thickness of 5% of the thickness is 90%. The weight becomes 220 kg. This weight is the conventional one 800kg
Compared to the iron plate as the laying plate,
Weight is 1/4. That is, although only four conventional iron plates could be loaded with respect to the loading capacity of one truck, the laying plate 10 shown in this embodiment has a thickness twice that of the conventional iron plate. 14 can also be stacked.

Here, the strength of the laying plate 10 and the strength of the iron plate 100 which is a conventional laying plate will be compared. Laying board 10 of the present invention 10 3000 mm x 1500
mm × 50mm Conventional iron sheeting board 100 3000mm × 1500
The laminated board 10 of the present invention having a laminated shape of 22 mm × 22 mm has a thickness of 2.2 to 2.3 times the thickness of the conventional laminated board 100 made of iron plate, and the weight is 1/3 to 1
/ 4.

Load-bearing test 1 (see FIG. 4.5) The laying board 10 and the laying board 1 are placed on a sleeper 50 stacked at a height of 40 cm.
00 in the longitudinal direction, and place
0 is installed in an inclined state. Vehicle C on the sloping slab
Ride the front two wheels (total weight 28t). Assuming that the spread plate 10 of the present invention has a flexure amount a, the flexure a = 60 mm. When the ride of the vehicle C was released, the vehicle C returned to a flat plate-like body. The conventional slat 100 made of an iron plate was bent so as to be almost in contact with the ground. Then, even when the ride of the vehicle C was released, the curved surface remained, and did not return to the flat plate-shaped body.

As is clear from the above experimental results, the laying board 10 having the laminated structure of the present invention has flexibility and can cope with a load of a vehicle by bending a small amount. When the load is removed, the state can be restored. In addition, the weight is 1/3 to 1/4 that of an iron plate, has sufficient load-bearing strength, and can be easily carried. That is, 1
Four times more than three times the conventional iron plate can be transported each time.

Load resistance test 2 (see FIG. 6) A manhole hole 65 is dug in a land 60 such as a road, and a concrete wall 70 is formed on the wall surface of the manhole hole 65. When the work is interrupted in this state, the sleeper 500 is placed on the periphery of the manhole hole 65, and the laying board 10 is placed. The height of the sleeper 500 at this time is set to 10 cm. In the case of a truck having a weight of 28 t, the load applied to one tire is 7 to 8 t. However, the spread board 10 laid on the sleeper 500 did not bend even when the tire W of one wheel was put thereon. Here, the slab is 2
If bent in the state depicted by the dashed line, the slab would contact the not-yet-dried concrete wall, causing the disadvantage of damaging the contact portion 75 of the manhole wall. As described above, the laying board 10 of the present invention has a high load resistance and a rigidity, and has a function of protecting a lower construction site covered with the laying board without fail.

Furthermore, it is completed in a series of manufacturing steps such as a laminating step, a surface resin coating step, and a step of arranging lifting tool mounting holes, and is easy to handle due to its lightweight structure. In addition, since the end of the laying board 10 is covered with a frame made of rubber or the like, peeling of the coating resin due to contact friction can be prevented, corrosion can be prevented, and a seal with an adjacent laying board can be surely formed. No more worries about leaks. As described above, in this embodiment, the honeycomb core has a hexagonal shape and a honeycomb shape. However, the same operation and effect can be obtained by a honeycomb structure such as an elliptical shape or a rhombic shape in which corrugated plates are attached. To achieve.

[0017]

As described above, the laying board according to the present invention is lightweight, has a certain load-bearing strength, is easy to handle, and can carry many laying boards in one transportation. Furthermore, it has appropriate hardness, and the protection function of the covering part at a construction site or the like is ensured. Further, a rubber frame is provided at the end of the laying plate, thereby reliably preventing corrosion, and when the laying plate is laid, sealing with the adjacent laying plate is ensured, thereby preventing water leakage.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a laying plate.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a perspective view of a honeycomb structure.

FIG. 4 is an explanatory diagram of an experiment of a laying plate of the present invention.

FIG. 5 is an explanatory diagram of an experiment using a conventional laying plate.

FIG. 6 is an explanatory diagram of an experiment on the robustness of the laying board of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Laying board 11, 13 Iron plate 15 Honeycomb material 17 Rubber frame 20 Reinforcement board 30 Hanging tool mounting hole 50, 500 Sleeper 100 Conventional laying board

Claims (6)

[Claims] 1. A laying plate simply laid on a construction site in the middle of construction, comprising: a honeycomb material provided with hollow columns; and a thin iron plate which covers an opening surface of the honeycomb material. An iron sheet is a laminated sheet that is laminated and fixed by an adhesive, and is made of a honeycomb material for 90% of the sheet thickness. 2. The laying board according to claim 1, wherein a rubber frame is provided at an edge. 3. The laying board has a weight of 260 kg or less and a load bearing capacity of 7 kg.
The laying plate according to claim 1, which has at least t. 4. The spread board according to claim 1, wherein the thickness of the spread board is 50 mm or less. 5. The laying board according to claim 1, wherein the laying board is provided with a hole for mounting a tool at a position which does not affect the honeycomb structure. 6. A tool mounting hole formed in a laying board,
The laying plate according to claim 5, wherein a reinforcing member is provided on a periphery of the hole.