JP3118642B2 - Extruded steps and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention extrudes a curable tread material,
The present invention relates to an extruded step for reinforcing each part and a method for producing the same.

(Prior Art) Conventionally, a molding step has been manufactured individually by putting a curable step board material into a mold.

(Problems to be Solved by the Invention) In the batch-type manufacturing method as described above, not only the manufacturing efficiency is poor, but also human labor is frequently used, so that there is a problem of heavy labor. Thus, extrusion molding is also conceivable, but it has been difficult to simultaneously and integrally form a connecting portion between the sasara girder and the step.

(Means for Solving the Problems) However, the present invention provides an extrusion molding step using a hardening material, in which an upper surface is a flat plate-like stepping plate, and a protrusion having a predetermined width is provided on a front portion and a rear portion of a lower surface of the stepping plate. A through hole is provided substantially at the center of each of the projecting strips, and a recessed plate that rises from the rear of the upper surface of the tread plate is provided, and reinforcing means is provided. A hardened material extrusion molding step characterized by fitting and bonding a cylindrical nut of the above, wherein the hardening material is a fiber concrete, a synthetic resin concrete or a lightweight concrete. Further, the reinforcing means is the above-described hardened material extrusion molding step in which a reinforcing bar is embedded. Next, in the continuous extrusion molding of the tread using a hardening material, a protrusion having a predetermined width is provided on a tread having a flat upper surface, and a front portion and a rear portion of the lower surface of the tread are provided, and penetrating substantially in the center of the both protrusions. A hole is provided, and while continuously extruding a step having a shape with a recessed plate rising from the rear of the upper surface of the step board from a nozzle, applying a reinforcing means, curing and curing, and then cutting to a predetermined length,
A method of manufacturing a continuous hardened material extruded step, wherein cylindrical nuts are fitted and bonded to both side end surfaces of the through hole of the tread plate and attached to the slab with bolts, wherein the hardened material is fiber concrete or synthetic resin. The present invention also provides a method for producing the hardened material extruded steps described above, which is made of concrete or lightweight concrete.

(Operation) In the present invention, the cylindrical nuts are fitted and bonded to both side ends of the through hole provided in the tread plate. Therefore, when the bolt is screwed to the slab, the positions where both side ends are screwed on the same center line. Therefore, the direction of the tightening force can be accurately adjusted when tightening with the bolt.

Further, since the through holes are provided at the time of extrusion molding, the direction is constant, and the same shape can be easily secured. Further, if the cross-sectional shape of the through hole is square, the rotation of the square nut is stopped. The steps of the extrusion molding have a sound absorbing property due to the nature of the material used, so that the sound at the time of use is small, the necessity of soundproofing is small, and there is no possibility of rusting like a metal stepboard.

(Example 1) A stepped plate 1 having a flat upper surface made of a hardening material, and a protruding portion having a predetermined width is provided at a front portion and a rear portion of a lower surface of the tread plate, and a through hole is formed at a substantially central portion of the both protruding portions. And a step 3 formed by integrally extruding a shape including a recessed plate 2 rising from a rear portion of the upper surface of the step board 1. The step 3 is provided with reinforcing means as appropriate at places other than the through hole of the tread plate with a reinforcing bar 8 or the like, and the cylindrical nuts 7, 7 (7) are respectively inserted into both end surfaces of the through holes 6, 6 (hexagonal hole). (Fig. 3).

The method of using the steps 3 of the above embodiment is as shown in FIGS.
Stairs 11 are formed by penetrating through 10, 10 and screwing into cylindrical nuts 7, 7 to fasten and fix the slab girder 9 and step 3. In the figure
12 is a column, 13 is a beam, and 14 is a tread for a landing 15.

The step 14 is of a type that is not provided with a step board only with a step board, and can also constitute a floor of a landing 15.

(Example 2) This example is a method for manufacturing an extrusion-formed step using a hardened material of the step 3 shown in Figs. 1 and 3.

That is, the hardened material of the steps 3 (for example, fiber concrete 16) is fed into the extruder 17, and mesh reinforcing bars 18 (rebars assembled vertically and horizontally) are fed into the extruder 17 at regular intervals as reinforcing means. In this case, from the nozzle of the extruder 17, as shown in FIG. 1, the upper surface is a flat tread plate 1 as shown in FIG. 1, and the front and rear portions of the lower surface of the tread plate are provided with protrusions of a predetermined width. A through-hole is provided at substantially the center of the step, and a step having a shape including a recessed plate 2 rising from the rear of the upper surface of the step board 1 is continuously and integrally extruded. Next, it is cut to a predetermined length (FIG. 8) by the cutting machine 19. The cutting by the cutting machine 19 is performed, for example, to a length of 2 to 5 steps (that is, a long length). Next, after curing and curing in the curing 24, the cutting machine 20
And cut into steps of the length of one piece. Next, it is put into the assembling machine 21 and the cylindrical nut 7 with the bolt 10 is fitted and bonded to both end surfaces in the through hole 6 with an adhesive. In this case, an adhesive is applied to the outside of the cylindrical nut 7 and is fixed by bonding. In the drawing, reference numeral 23 denotes a power unit of the extruder.

The fiber concrete is made by adding a synthetic resin fiber (for example, 12 mm in length and 0.2 mm in diameter) to ordinary concrete for 1 to 2 times.
% (Capacity based on the amount of concrete). The fiber may be a metal fiber (for example, stainless steel having a length of 22 mm and a diameter of 0.5 mm) in addition to the synthetic resin fiber.
% (Capacity relative to the amount of concrete) can be used. In short, it is used to increase tensile strength and prevent cracking.

In the above-described embodiment, the step 3 having the step board and the recessed board has been described. However, it is needless to say that the extrusion molding can also be performed in the case of using only the step board (for example, a landing step).

The tread plate manufactured as described above is used by fixing it with a bolt 10 to a cylindrical nut 7 bonded to both ends of the through hole in the slab girder 9 shown in FIGS. 4 to 7 as in the first embodiment. .

(Effects of the Invention) That is, according to the steps of the present invention, since the through holes are provided at the front and rear portions of the tread plate, cylindrical nuts can be fitted and bonded to both end portions of the through holes by using the through holes. Has the effect of being able to be securely attached to the slab girder by means of bolts screwed into the slab.

Further, according to the method of the present invention, by extruding the steps, there are various effects such as full automation, uniformity, mass production, and good surface finish. However, since they can be formed in the same shape, post-processing (finishing) becomes unnecessary, which is also effective for simplifying the process.

Since the extruded material has a sound absorbing property due to its properties, the sound at the time of use is small, the need for soundproofing is small, and there is no danger of initial rust unlike a metal tread.

In addition, since a protrusion having a predetermined width is provided on the front and rear portions of the lower surface of the tread plate, a through hole is provided at substantially the center of both protrusions, and since the tread plate and the penetration plate are integrally formed,
Since the effect of increasing the strength of the tread plate against bending can be obtained, the tread plate can be reduced in weight and the manufacturing process can be simplified.

[Brief description of the drawings]

FIG. 1 is an enlarged side view of a part of an embodiment of the present invention, FIG. 2 is an enlarged partial cross-sectional view showing a fixed state with a slab, and FIG. 3 is an enlarged plan view of a part of the embodiment. Figure,
FIG. 4 is a partially cross-sectional side view showing the state of use, FIG. 5 is also a partially plan view, FIG. 6 is a partially longitudinal enlarged front view of the landing, FIG. 7 is also a longitudinal enlarged side view, FIG. 8 is a block diagram of a method of manufacturing an extrusion step. 1 ... step board, 2 ... sink plate, 3, 14 ... step 6 ... ... through hole, 7 ... cylindrical nut, 9 ... sasara girder 10 ... bolt, 11 ... stairs, 17 ... extrusion Machine

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04F 11/00-11/116 B28B 3/20

Claims (5)

(57) [Claims] 1. An extrusion molding step made of a hardening material, wherein a stepped plate having a flat upper surface is provided, and a projection having a predetermined width is provided at a front portion and a rear portion of a lower surface of the stepping plate. A through-hole was provided, and a reinforcing plate was provided which rises from a rear portion of the upper surface of the tread plate, a reinforcing means was provided, and a cylindrical nut for fixing a girders was fitted and bonded to both end surfaces of the through-hole. Extruded steps of hardened material characterized by 2. The extrusion step of a hardened material according to claim 1, wherein the hardened material is fiber concrete, synthetic resin concrete or lightweight concrete. 3. The step of extruding a hardened material according to claim 1, wherein the reinforcing means has a reinforcing bar embedded therein. 4. In a continuous extrusion molding of a tread plate made of a hardening material, a tread plate having a flat upper surface, and a protrusion having a predetermined width are provided on a front portion and a rear portion of a lower surface of the tread plate, and substantially central portions of the both protrusions are provided. A step having a shape provided with a through-hole in the portion and having a recessed plate rising from the rear of the upper surface of the tread plate is continuously extruded from the nozzle, the reinforcing means is applied, cured and cured, and then cut to a predetermined length. A method for manufacturing a continuous hardened material extruded step, wherein a cylindrical nut is inserted and bonded to both end surfaces of the through hole of the tread plate, and the bolt is mounted on a slab girder. 5. A method for manufacturing a hardened material extrusion molding step according to claim 4, wherein the hardened material is fiber concrete, synthetic resin concrete or lightweight concrete.