JPH0432430Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Field of Industrial Application) The present invention relates to a non-slip member for stairs, and in particular, a long extruded molded product is cut into a predetermined length and fitted into a fitting frame, and the end of the tread is This relates to an anti-slip member that is embedded in a body and has an extremely low shrinkage rate. (Problems to be solved by prior art and invention) Conventionally, synthetic resin stair anti-slip members have been extruded into a predetermined shape, cut into a predetermined length, and attached to the end of the tread. However, these anti-slip members made of synthetic resin have the drawback of severe shrinkage over time. For the purpose of mass production and cost reduction, these anti-slip materials for stairs are not annealed after extrusion to stabilize shrinkage, so gaps form at the edges within a few years. There are drawbacks that arise. There is also a composite material with a hoop made of a rigid material such as metal inside to prevent shrinkage and increase strength, but in this case, there are disadvantages such as increased cost and troublesome cutting. Traditionally, synthetic resin strings, belts, etc. have had glass fiber placed inside them as a core material, but the purpose of this glass fiber core placement is to
It was used to increase the tensile strength of belts, etc. The inventor conducted various experiments by inserting various types of fiber core materials into the anti-slip member for stairs extruded from synthetic resin, and found that they were able to sequentially feed multiple glass fiber threads into the mold. It has been found that when a plurality of glass fiber core materials are arranged in a well-balanced manner along the longitudinal direction within the anti-slip member, thermal shrinkage does not occur at all or is significantly reduced. Therefore, the purpose of the present invention is to solve the above-mentioned drawbacks of the conventional anti-slip members for stairs, to be easy to manufacture, and to significantly reduce shrinkage in the longitudinal direction due to temperature changes and over time. An object of the present invention is to provide an anti-slip member for stairs. (Means for solving the problem) The anti-slip member for stairs according to the present invention has a large number of uneven parts formed on the surface side, and is designed to be embedded in the end of the tread while being fitted into the fitting frame. In the anti-slip member for stairs, the anti-slip member is formed by extrusion molding synthetic resin, and has fitting fitting portions on both ends that fit into dovetail-shaped mounting grooves provided in the fitting frame. It consists of a main body formed with a 3-dimensional structure, and a plurality of core threads made of glass fiber embedded inside the main body, and the core threads made of glass fiber are arranged parallel to each other along the length direction of the main body. This is what was placed. (Function) When extrusion-molding a non-slip member for stairs, a plurality of twisted glass fibers are inserted into a mold at predetermined intervals using an appropriate means, and the twisted glass fibers are inserted in synchronization with the molding speed. Send it in. As a result, a plurality of core threads made of glass fiber are housed in the anti-slip member in parallel with each other along the longitudinal direction of the main body. The number of glass fiber threads, the spacing between the threads, etc. should be appropriately set depending on the anti-slip member itself to be molded, its cross-sectional shape, etc. In this way, glass fiber core threads are placed parallel to the anti-slip member, cut to a predetermined length, and the thermal shrinkage rate in the longitudinal direction is measured.As is clear from the experimental data shown later, No heat shrinkage was observed at all, and an excellent heat shrinkage prevention effect was obtained. This effect is thought to be due to the fact that the thermally stable glass fibers are made into threads and have enhanced binding properties with the synthetic resin. It is expected that thermal shrinkage will be extremely small in the non-slip members for stairs. In the anti-slip member for stairs configured as described above, thermal shrinkage can be prevented without repeating high-temperature annealing operations.
It is possible to significantly reduce costs. Also,
It is simple in structure and easy to cut to a predetermined length. (Example) An example of the anti-slip member for stairs according to the present invention will be described based on FIGS. 1 and 2. FIG. 1 is a sectional view of the anti-slip member, and FIG. 2 is a sectional view showing an example of attachment. In the figure, reference numeral 1 denotes a non-slip member, which is extrusion molded from semi-hard or soft synthetic resin, and has many uneven parts 2 formed on the surface side and fitting mounting parts 3 formed on both sides. It is something.
Figure 2 shows the installation state, and shows the above-mentioned anti-slip member 1.
The fitting mounting portion 3 is fitted into a dovetail-shaped fitting groove formed in the fitting frame 5, and in this state is embedded in the end of the footboard 6. During extrusion molding of the above-mentioned anti-slip member 1, a plurality of twisted or untwisted glass fibers (eight in the example) are inserted into the molding mold by an appropriate means, and are continuously fed in synchronized with the extrusion speed. . In the anti-slip member 1 thus formed, eight core yarns 4 made of glass fibers are housed in parallel with each other in a well-balanced manner along the longitudinal direction. The number of glass fiber threads to be inserted and the spacing between the threads should be determined depending on the anti-slip member to be formed. When such means are used, the heat shrinkage effect is further enhanced because the glass fibers are made into threads and the binding properties of the binder are enhanced. Next, as a result of comparing and measuring the heat shrinkage rate of the anti-slip member 1 shown in Fig. 1 and a conventional member having the same size and cross-sectional shape but without the glass core thread 4, the results are as shown in the table below. It was hot on the street. In addition,
The anti-slip member shown in Figure 1 has a width of 35 mm and a maximum thickness of 5 mm. The annealing conditions are: temperature 110℃;
The time was 2 hours, and the change in length before and after heating was measured. Cooling was done naturally, and after a certain amount of time had passed, it was taken out of the furnace and left to stand at room temperature. In the table, the numbers in the left column are sample numbers, and five samples with the same length were prepared. L1
is the length before heating, L2 is the length after heating, and the amount of shrinkage R
is L1-L2, and shrinkage rate (%)=L1-L2/L1×100.

【table】

[Table] As is clear from the above comparative measurement results, the anti-slip member according to the present invention has no thermal contraction at all and is found to be extremely stable. (Effect of the invention) According to the anti-slip member for stairs according to the invention,
Since a plurality of core yarns made of glass fibers are installed inside in parallel along the longitudinal direction, thermal shrinkage can be eliminated or extremely reduced, as is clear from comparative test data. Therefore, shrinkage can be prevented without repeating high-temperature annealing work or forming a composite material with a hoop material such as a metal member, and it is possible to significantly reduce costs. In addition, it is simple in structure and easy to cut into a predetermined length, making it ideal as a non-slip member for stairs made of synthetic resin.

[Brief explanation of the drawing]

The drawings show an embodiment of the anti-slip member for stairs according to the present invention, and FIG. 1 is a sectional view, and FIG. 2 is a sectional view showing an attached state. 1... Anti-slip member, 2... Uneven part, 3...
Fitting attachment part, 4... Core thread, 5... Fitting frame, 6...
Treadboard.

Claims (1)

[Scope of Claim for Utility Model Registration] A non-slip member for stairs that has a large number of uneven parts formed on the surface side and is embedded in the end of a tread while being fitted into a fitting frame, the above-mentioned non-slip member , a main body part formed by extrusion molding of synthetic resin, and a fitting mounting part formed at both ends to fit into a dovetail-shaped mounting groove provided in the fitting frame, and an inner part of the main body part. A non-slip staircase comprising a plurality of embedded glass fiber core threads, the glass fiber core threads being arranged parallel to each other along the length direction of the main body. Element.