JPS5915316Y2 - stair treads - Google Patents

Description

[Detailed description of the invention] The present invention relates to stair treads, particularly stair treads made of a metal frame and a synthetic resin tread cover, and its purpose is to suppress the sound of footsteps. In addition, there is no rust, the tread cover does not peel off or fall off, and the tread cover can be easily replaced.In addition, it is possible to install a blind board between each tread. We also provide stair treads that are easy to use.

The present invention will be explained in detail below using examples.

The frame body 1 is made up of two steel rectangular tube bars 8, 8 arranged in parallel, and a plurality of steel bars that open downward and are constructed at the ends and center between the two rectangular tube bars 8, 8 located in the front and back. A nut 11 is welded to the bottom piece 10 of the opening at both ends of each square tube bar 8 so that the hole communicates with a through hole 12 provided in the bottom piece 10. , the upper surface of the U-shaped bar 9 is lower than the upper surface of the square tube bar 8 and is fixed to the square tube bar 8.

The tread cover 2 is extruded from synthetic resin to have a constant cross section, and has a plurality of grooves 14 running in the longitudinal direction and spaced apart in the width direction on the top surface to prevent slipping.

By hanging L-shaped pieces downward from the front and rear edges of the tread cover 2, a fitting portion 15.15 is formed in which the opposing surfaces and side end surfaces are open. The tread plate 3 is constructed by covering the frame 1 with the tread cover 2 by fitting the rectangular tube bar 8 of the frame 1 through the opening in the side end surface. Normally, the end of the tread cover 2 cut to the same length as the frame 1 is inserted into the end of the frame 1 and covered over the entire length of the frame 1, but the tread cover 2 is cut to the same length as the frame 1. If the fitting part 1 is molded from soft synthetic resin, the flexibility of the resin can be used to
5.15 may be opened and the tread cover 2 may be placed over the frame 1 from above, and in this case, as shown in FIG.
, 5, the stepboard cover 2 can be attached after the stepboard frame 40 used as the metal frame 1 is constructed and fixed.

Further, a hollow rib 16 is integrally provided on the lower surface of the substantially central portion of the tread cover 2 over the entire length in the longitudinal direction, and the rib 16 is placed on the upper surface of the U-shaped bar 9.

The treadle 3 thus obtained is attached to a steel stringer 4 via a treadle mounting bracket 5, as shown in FIG. 1, and the treadle mounting bracket E is bent into an L-shape. The vertical pieces 17 are welded and fixed substantially horizontally to the inner surfaces of both stringers 4 arranged parallel to each other, and bolts 6 are inserted from below into mounting holes 19 and 19 bored in the horizontal pieces 18.
is screwed into the nut 11 through a through hole 21 drilled in the lower horizontal piece 20 of the fitting part 15 so as to communicate with the nut 11, and the tread cover 2 is fixed to the frame 1. At the same time, the entire tread 3 is attached to the stringer 4. When the tread plate 3 is fixed, both end surfaces of the tread plate 3 are hidden by the stringers 4, so if the tread cover 2 is damaged or if you want to replace the tread cover 2 according to your preference, remove the tread plate 3 and then move the tread cover 2 to the side. The footboard cover 2 can be easily replaced by pulling it out.

In addition to this bolt 6, the treadle cover 2 also includes the U-shaped bar 9.
It is fixed to the frame 1 by a screw 24 screwed into the rib 16, and the tip of this screw 24 is inserted into the hollow part 2 of the rib 16.
2 and does not protrude from the top surface of the footboard cover 2.

A projecting portion 2 provided at the upper part of the front end surface of the footboard cover 2
3 has unevenness formed on its surface, and each of the front and rear fitting parts 15,
Locking pieces 25 and 26 are formed from the tip of the lower horizontal piece 20 of 15 and rise upward along the square tube bar 8, and prevent the tread cover 2 from being pulled out and rattled in the front-rear direction. .

Here, a lower opening groove 29 that opens downward is formed in the locking piece 25 of the fitting part 15 located at the front over the entire length in the longitudinal direction, and the rear end surface of the fitting part 15 located at the rear. Upper opening grooves 28 that open upward are formed in the upper part so as to extend along the entire length in the longitudinal direction, and one end of the blind plate 30 shown in FIG. At the same time, the other end is fitted into the lower opening groove 29 of the step board 3 located on the upper stage, so that the gap between the upper stage and the lower stage is closed over the entire length in the longitudinal direction.

This blindfold board 30 is molded from synthetic resin, and is provided with a wavy part 31 extending over the entire length in the longitudinal direction at the central part. The blind plate 30 is adapted to the longitudinal and vertical distances between the upper and lower step boards 3, 3, which vary depending on the slope of the stringers 4.

At both ends of the blind plate 30, semi-circular hook portions 32, 32 extending over the entire length in the longitudinal direction are formed. It is attached to the footboard 3 by engaging with the portion 33.

As described above, in this invention, the tread plate is constructed by covering the metal frame with a synthetic resin tread cover, so there is no rust on the surface, and the steel frame can be directly stepped on. There is no need to worry about damage due to abrasion, and therefore the durability of the frame itself can be improved by galvanizing, etc. Moreover, the tread is a composite structure of a steel frame and a synthetic resin tread cover. Therefore, the footsteps of people going up and down can be kept low, making it especially suitable for outdoor stairs in apartments, factories, etc. Furthermore, since the tread cover is molded from synthetic resin, it can be colored in any color by adding pigments. This not only makes the appearance beautiful, but also prevents the color from fading even if the tread cover wears out.Moreover, this tread cover has a rectangular tube bar on the frame that fits into the fitting part of the tread cover. Although it has a locking piece at the tip of the fitting part that rises up along the square tube bar, it does not cause the tread cover to peel off, fall off, or wobble, and at the same time prevents the tread cover from attaching to the frame body. It has the advantage that the tread cover can be easily replaced by pulling it out to the side, and it also has an upper opening groove and a lower opening groove on the tread cover to attach the blind plate that will be placed between each tread. This has the advantage that it can be easily carried out without requiring a separate mounting member.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the present invention, Fig. 2 is a partial cross-sectional view of the same, Fig. 3 is a side view showing the treadle of the above,
Fig. 4 is a plan view showing the frame body as above, Fig. 5 is a sectional view taken along the line X-X in Fig. 4, Fig. 6 is a side view showing the blindfold plate as above, and Fig. 7 is one use of the same as above. It is a perspective view showing an example, in which 1 is a frame body, 2 is a treadle cover, 8 is a square tube bar, 15 is a fitting part, 2
5.26 is a locking piece, 28 is an upper opening groove, and 29 is a lower opening groove.

Claims (1)

[Scope of utility model registration request] It is made up of a metal frame with square tube bars at the front and rear, an L-shaped piece that hangs downward from the rear edge, and a locking piece that rises from the tip edge of each L-shaped piece. The mutually facing surfaces and side end surfaces are open, and the upper base e rectangular cylindrical bar is provided with a fitting part into which they are respectively fitted, and the front fitting part is provided with a lower opening which opens downward and into which the upper end of the blind plate is fitted. A stair tread cover comprising a synthetic resin tread cover having a groove opening upwardly on the rear end surface of a rear fitting part and an upper opening groove into which the lower end of a blinding plate is fitted.