JPH0453684B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention particularly relates to a method for manufacturing a stair block suitable for safety and practicality by providing natural stone, which is different from the tread, on the riser surface of the stairs. It is.

[Prior Art] The present inventor has developed a method for manufacturing stair blocks with roughly shaped sides by a centrifugal molding method using a concrete raw material mixed with crushed granite and cement. We have previously applied for a method of manufacturing a stair block by applying a molding method and attaching natural stone to only the treads or both the treads and the risers (for example, Japanese Patent Application No. 127754/1986). (Sho 62-191752) has been completed.

[Problems to be Solved by the Invention] However, although the stair block manufactured by this manufacturing method has excellent economical efficiency and aesthetic features, the treads and kick surfaces of the stair block are of the same color, and the color tone of the stair block is the same. Due to the lack of visual contrast, people who are not careful when going up and down the stairs often end up in accidents where they miss a step and get injured.

In other words, when it comes to stairs in station buildings where there is a lot of traffic, there are many accidents resulting in injury or death caused by people stepping off the stairs. etc. are the main ones. The fact that it is easy to miss a step on the stairs means that it is difficult to check the width of the treads of the stairs when going up or down the stairs, and that the treads of the stairs are worn out and become slippery.

[Means for Solving the Problems] The present invention has been made with this in mind, and as a result of research by the present inventor, it has been found that it is not only economical and aesthetically pleasing, but also safe as a staircase block. Succeeded in manufacturing an extremely tall stair block. In other words, when forming a stair block using concrete, the first purpose is to make it easy to check the tread width of the constructed stair, so that the width of the tread on the tread surface of the stair block is measured from the side edge of the riser surface to the riser surface. The goal is to apply a color tone that is different from the color tone of the tread throughout the area. The second purpose is to make the treads of the stair block made of artificial stone mixed with natural crushed stone in order to maintain a high coefficient of friction on the treads.

[Example] A method for manufacturing a stair block that can achieve the above object will be specifically described below. 1
is a stair block manufactured according to this embodiment, and this stair block 1 includes a stair block base 2 which is centrifugally formed into a substantially shape, and a natural stone plate 3 attached to the riser surface 2' of this stair block base 2. It is made up of The stair block base 2 is centrifugally formed using concrete made by mixing cement and granite frame stones, and the mixing ratio of the cement and crushed stone is, for example, 3 parts cement to 7 parts crushed stone. By doing so, the strength of the block base body 2 can be maintained at an appropriate value, and a high coefficient of friction of the tread surface can be ensured.

The natural stone plate 3 is a natural granite whose color tone is different from the gray tone of the stair block base body 2, and is, for example, a black or brown stone plate. Also this stone plate 3
A plurality of concave grooves 4 are formed on the back surface of the stair block in order to increase the adhesive force with the stair block base body 2.

The manufacturing process of the stair block 1 involves setting the stone slab 3 in a predetermined molding form (not shown) at a position that will become the riser surface of the stair block 1, and then pouring the concrete into the molding form. After filling, this molding frame is sealed and attached to a centrifugal molding material (not shown), and then this centrifugal molding machine is driven to integrate the natural stone slab 3 and the stair block base 2 made of concrete. The stair block 1 is centrifugally molded. In this embodiment, natural stone is used as the uniquely colored stone plate 3, but the stone plate is not limited to this, and may be an artificial stone plate with artificial coloring. Further, when the stair block base 2 is centrifugally molded, appropriate reinforcing bars may be embedded in the base 2.

[Effects of the Invention] As described above, according to the present embodiment, the riser surface of the stair block 1 has the tread surface 2'' extending from the edge of the riser surface side of the tread surface 2'' of the stair block 1 to the entire riser surface. In other words, a two-tone stair block 1 is manufactured by attaching natural stone plates of a color different from that of the stair block 1. Therefore, by constructing a staircase as shown in FIG. 2 using this two-tone staircase block 1, for example, when going up this staircase, the riser surface 3 and tread surface 2'' of the staircase block will be different in color. This makes the steps of the stairs clear and makes it easier to climb.Also, when descending the stairs, the 2" width of the tread of the stair block 1 forms a band-like shape on the side edge of the riser. The unique color band 3' makes it clear, which reduces the chances of people missing their step on the stairs when descending, which has the effect of increasing safety. Furthermore, the tread 2″ is
Since it is made of concrete mixed with natural stone, crushed stone, and cement, if the treads of this stair block are stepped on over a long period of time, relatively hard crushed stone particles will protrude to the surface and become rough. from,
It also has the effect of maintaining stairs with high sliding friction.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing an embodiment of a stair block according to the present invention, and FIG. 2 is an explanatory view showing the state of construction of a staircase using the block. 1... Stair block, 2... Block base, 3
...Keage surface natural stone slab, 4...concave grooves.

Claims (1)

[Claims] 1. A colored stone plate placed from the edge of the riser side of the stair block tread to the entire riser surface is set in the formwork in which the stair block is to be formed, and then crushed natural stone and cement are mixed in this formwork. Then, the colored stone slabs and concrete of a different color are filled, and then this formwork is set in a centrifugal forming machine so that the maximum centrifugal force is applied to the tread surface, and the different colored stone slabs and concrete are integrally formed. A method for manufacturing a stair block, characterized by: