JPS5811862Y2 - stair treads - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to treads for building stairs.

Conventional treads have a rectangular cross section with the front side facing vertically, so it is easy to form the fitting part of the stair side board that matches the side edge, making it easy to assemble to the stairs. When in use, the edge between the front surface and the top surface is angular and easily breaks, and injuries can easily occur at the edge if a person misses a step when going up or down stairs.

Therefore, the present invention aims to provide a stair tread that is easy to assemble to a staircase, has an essential edge between the top surface and the front surface, and is less likely to cause injury due to the edge, making it highly safe. It is.

Next, an illustrated embodiment of the present invention will be described. The treadboard 1 of this embodiment has a main body 5 of the treadboard 5 formed by pasting plywood 3.4 on both upper and lower surfaces of a core material 2 made of wood. A front edge material 6 made of hardwood such as South Sea oak is attached to the front surface, and a wide recess 7 is formed adjacent to the front edge material 6 on the upper front part of the main body 5 of the tread.
A hardwood 8 such as zelkova is fitted into the recess 7, and a plurality of non-slip grooves 9 are provided in the left and right direction in the center of the upper surface of the hardwood 8.
Hardwood veneers 10 and 11 are attached to the upper and lower surfaces, respectively.

The front edge material 6 has a vertical surface 12 on the left and right sides of the front surface that is substantially perpendicular to the upper surface, and an arcuate projection 13 is formed at the upper center of the front surface, and a front upper edge 14 is formed between the arcuate projection 13 and the upper surface. is an obtuse angle θ
The lower side of the arcuate protrusion 13 is aligned with the lower edge of the vertical surface 12 via the concave arcuate curved surface 15.

When constructing stairs using the treadboard 1 of this example as described above,
The left and right end portions 16 are fitted into the fitting portions 18 of the corresponding stair side plates 17, and the risers 19 are attached between the lower front part of the upper tread 1 and the rear part of the lower tread 1, thus obtaining the stairs 20 ( (See Figure 4).

In the construction state of this staircase 20, the front surface of the tread plate 1 has an arc-shaped protrusion 13 and the front upper edge 14 forms an obtuse angle θ. The edge 14 is difficult to break, and the risk of injury due to the front upper edge 14 and the arcuate protrusion 13 is prevented.On the other hand, since the left and right sides of the front surface of the tread plate 1 are vertical surfaces 12, the rectangular end surface is Therefore, it is easy to form the fitting part 18 of the stair side plate that matches the side end 16 in the staircase construction.

In addition, on the upper side, core material 2, plywood 3, 4, front edge material 6, hardwood 8
Although the tread plate 1 is constructed with the above, the tread plate of the present invention can also be integrally formed with a single plate.

As mentioned above, the present invention makes the left and right parts of the front face vertical planes that are substantially perpendicular to the top face, and forms an arc-shaped protrusion in the upper center of the front face, so that the front upper edge formed by the arc-shaped protrusion and the top face is at an obtuse angle. The front upper edge formed by the upper surface of the center of the tread and the front surface, which is normally easy to break when going up and down stairs, is difficult to break, and the risk of injury due to the front upper edge and the arcuate protrusion can be prevented. Moreover, since the front left and right sides are vertical surfaces, it is easy to form the fitting portion of the stair side plate that matches the side end portion, and it is easy to assemble it to the stairs.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is an enlarged sectional view taken along the line AA in FIG. 1, and FIG. This is a partially cutaway side view showing the state in which it is assembled to the stairs. 1...Treadboard, 2...Core material, 3, 4...
...Plywood, 5...Treadboard main body, 6...
・Front edge material, 7... Recessed part, 8... Hardwood,
9... Anti-slip groove, 10.11... Projected plate,
12... Vertical surface, 13... Arc-shaped protrusion,
14... Front upper edge, 15... Curved surface, 16
...Side end, 17...Stair side board, 18
...Inset part, 19...Riser board, 20.
...Stairs, θ...obtuse angle.

Claims (1)

[Scope of utility model registration request] The left and right parts of the front surface are vertical planes that are substantially perpendicular to the top surface, and an arc-shaped projection is formed at the upper center of the front surface, and the front upper edge formed by the arc-shaped projection and the top surface is formed at an obtuse angle. stair treads.