JPH0241220Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to a plywood panel that can be used as a treadboard or floorboard for scaffolding used at civil engineering work, construction work, or other construction sites, or as a building material.

<Prior art> Conventionally, as a panel-shaped plate to which a certain force is applied, a simple hollow panel made of a rectangular frame with plywood or a plurality of plates nailed to both sides, and a partition-shaped plate inside for reinforcement. A panel containing bones (beams),
Alternatively, if even more strength was required, thick plywood cut into a predetermined size was used.

<Problems to be solved by the invention> However, among the above, even if wooden bones (beams) are inserted inside for reinforcement and the surface board is fixed by nailing or gluing, a considerable amount of bones must be inserted. It does not have enough strength, and if a large amount of bone is added, it absorbs a lot of water, increases weight, and becomes extremely expensive. On the other hand, thick single-piece plates (for example, 3 plate thick) are relatively satisfactory in terms of strength, cost, etc.
When using plywood (~4 cm), it has disadvantages such as being heavy, bending a lot due to its flexibility, and having to use many fulcrums.

<Means for solving the problems> The plywood panel of the present invention has a skin on one side along either side of the frame 1 at the same height as the frame, in a frame 1 consisting of an end plate 3 and a side plate 2. Reinforcement beams 5 made of bamboo boards with a 100% diameter are arranged vertically at regular intervals, and one or more rows of block-shaped spacers 6 that determine the spacing are arranged between the reinforcement beams 5 to frame the reinforcement beams 5 and spacers 6. 1, and a plywood surface plate 9 is fixed to the upper surfaces of the frame 1 and reinforcing beam 5 to cover each surface.

<Function> In this device, the load and bending moment applied to the surface plate of the panel are received by reinforcing beams made of bamboo placed vertically inside the panel, and these reinforcing beams are extremely strong against loads in the vertical direction. Prevents panel bending and surface plate denting. In addition, the spacers inserted between the reinforcing beams fix the bamboo reinforcing beams, which tend to bend laterally, integrally with the frame, thereby compensating for the drawbacks of the reinforcing beams.

<Example> To explain in detail the example shown below, a rectangular frame 1 made of long wooden boards is constructed by fixing the ends of end plates 3, 3 and side plates 2, 2, respectively. At the center in the longitudinal direction, a wooden reinforcing shaft 4 having the same height as the frame and reinforcing the frame 1 itself is fixed to the end plates 3, 3. Inside the frame 1, a large number of plate-shaped reinforcing beams 5 having a constant length and the same height as the frame are arranged in parallel at regular intervals so that both ends are fitted between the end plates 3, 3. It is set in.

In addition, between each reinforcing beam 5 and between the outermost reinforcing beam 5 and the side plates 2, 2, a rectangular parallelepiped or a cube is formed and the vertical height is the same as that of the frame 1 and the reinforcing beam 5 so as to regulate the spacing between them. Equal block spacer 6
are inserted in multiple rows at regular intervals (one row is fine if the side plate is short), and each row of spacers 6 is inserted into the frame 1.
A spacer shaft 7 made of a bolt, a metal rod, a bamboo bar, or the like passes through the reinforcing beam 5 in the left-right direction, and is held integrally with the frame 1 and the reinforcing beam 5. In this row, a bolt is used as the spacer shaft, and a nut 8 is screwed into one end to integrally fasten the entire spacer.

The above frame 1, reinforcement beam 5, reinforcement shaft 4, spacer 6
After assembly, the upper and lower surfaces are cut to form the same plane, and on each plane, surface plates 9, 9 made of plywood with a thickness of about 6 to 10 mm are glued at key points so that they are in close contact with the whole. Or it is fixed integrally by nailing or the like.

Further, the reinforcing beam 5 is formed into a plate shape with a constant width (2 to 3 cm), leaving as much of the high-density fibrous skin on the circumferential surface of the bamboo as possible.

<Effects of the invention> According to the invention constructed as described above, the pressing load or bending moment applied to the panel is calculated from the longitudinal direction with respect to the rectangular (however, one side is arc-shaped) cross section of the reinforcing beam. Since the reinforcing beams are made of bamboo, they have high rigidity against loads in this direction. In particular, one side in the longitudinal direction of its rectangular cross section is made up of the bamboo skin, which has the highest concentration of fibers, so it has extremely high rigidity not found in other natural materials, and the entire panel Make it very strong.

In addition, since the reinforcing beams are thin, they take up less space than other natural materials and have more space within the panel.Furthermore, since they have poor water absorption, there is no need to worry about weight increase, and they are highly durable. Furthermore, since a large number of block-shaped spacers are inserted between the reinforcing beams, the reinforcing beams can be fixed well, and the integrity of the entire panel is improved, resulting in high strength.

Incidentally, the plywood panel according to the present invention has the advantage that it can be made at a lower cost than a single piece of plywood.

[Brief explanation of the drawing]

1 and 2 are a partially cutaway perspective view and a sectional view taken along the line A-A in FIG. 1, respectively, showing an embodiment of the present invention. 1: Frame, 2: End plate, 3: Side plate, 4: Reinforcement shaft,
5: Reinforcement beam, 6: Spacer, 7: Spacer shaft, 8: Nut, 9: Surface plate.

Claims (1)

[Scope of utility model registration request] Inside a frame 1 consisting of an end plate 3 and a side plate 2, reinforcing beams 5 made of a bamboo board with a skin left on one side are placed at regular intervals along either side of the frame 1 at the same height as the frame 1. The reinforcing beams 5 are arranged vertically, and one or more rows of block-shaped spacers 6 are arranged between the reinforcing beams 5 to determine the spacing between them, and the reinforcing beams 5 and spacers 6 are fixed integrally with the frame 1. A plywood panel is formed by fixing a plywood surface plate 9 covering each surface to the upper surface of the panel.