JP3074525U - Assembled steel frame staircase unit - Google Patents

Abstract

(57) [Summary] (Modifications) [Problem] To provide an assembling type steel frame stair plate unit which is capable of attenuating high cycle vibration peculiar to metal generated at the time of ascending and descending, preventing generation of noise, and having excellent corrosion resistance. A support bracket (4A) sandwiched between and connected to a slab girder (3), a plate-shaped muffler (4B) having the same width as the support bracket and stacked on the support bracket (4).
And a galvanized tread 4C which is superimposed on the plate-shaped silencer. The support bracket has a mounting portion 4A1 which is bent at a right angle, extends and contacts the slab beam, and
, The upper edge 4A2 is bent toward the upper end of the plate-shaped muffler so as to cover the plate-shaped muffler. The tread plate has the same width as the support bracket, has a stair nosing portion hanging down before and after the tread portion and a rising portion having a kick angle, and has a kick-up portion having a click angle. Linked to

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to an assembling type steel frame staircase unit that is capable of effectively preventing the generation of noise by attenuating high-cycle vibration peculiar to metal generated during lifting and lowering, and having excellent corrosion resistance.

[0002]

[Prior art]

 Conventional techniques related to steel stairs include Japanese Patent Application No. 5-353607, Japanese Patent Application Laid-Open No. 6-146518, Japanese Patent Application No. 9-363537, and Japanese Patent Application No. Hei 10-88760. The description of the prior art in the specification of Japanese Patent Application Laid-Open No. 6-146518 relates to a steel staircase. The problem is described. In summary, steel stairs are widely used because they have fire resistance, are relatively lightweight, have high structural strength, and have excellent workability. In particular, for outdoor stairs that require corrosion resistance that also serves as emergency stairs for condominiums, buildings, etc., the treads made of striped steel plates are welded to steel girder beams, assembled into an integrated staircase structure, and then immersed in zinc plating. Steel stairs are applied to increase corrosion resistance. The integrated steel staircase with “dipped galvanized” uses a single-layer striped steel plate for the tread. Therefore, the drawback of the steel staircase is noise, which prevents high levels of noise generated when going up and down. Therefore, a damping steel plate with a viscoelastic resin layer interposed between steel girder beams and welded to assemble it into an integrated staircase structure, which cannot be achieved by “dip galvanizing” cannot achieve the purpose. In Japanese Patent Application Laid-Open No. 6-146518, a tread plate made of a single-layer steel plate is welded and joined to a steel girder to assemble it integrally, and the back surface of the tread portion of each tread plate of the stair body whose entire surface is galvanized. It proposes a steel stair that is made by bonding damping steel plates.

[0003]

[Problems to be solved by the invention]

 However, the steel staircase disclosed in Japanese Patent Application Laid-Open No. Hei 6-146518 is large in size when the steps made of a single-layer steel plate are welded and joined together to the girder girders, and the galvanizing equipment becomes large. There is also a problem that large trucks and cranes are required for transportation to the installation site.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and can effectively prevent the generation of noise by attenuating high cycle vibration peculiar to metal generated when ascending and descending. An object of the present invention is to provide an assembling type steel staircase step unit having excellent reliability in terms of workability, appearance, and structural strength when employed in outdoor stairs of condominiums and buildings.

[0005]

[Means for Solving the Problems]

 The invention of the present application consists of a support bracket that is sandwiched between the girders on both sides of the stairs and connected at both ends to the girders by fasteners, a plate-shaped silencer that is the same width as the support bracket and is stacked on the support bracket, The support bracket has, at both ends, a mounting portion which bends at a right angle and extends to be in contact with the slab, and has a width equal to the width of the bracket and is superimposed on the plate-shaped silencer. It is configured to be connected by fasteners through holes formed in the spar, and furthermore, the edge closer to the upper stage extends closer to the upper stage than the plate-shaped muffler so as to hide the plate-shaped muffler. The tread plate has the same width as the support bracket, and has a stepped nose part hanging down and a rising part rising upward on both edges of the tread surface part, and Nose and kick up For a staircase made of assemblable steel frames, wherein the support bracket, the plate-shaped muffler, and the tread are perforated and connected by fasteners. It is to provide a step board unit.

[0006]

[Embodiment of the invention]

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, a description will be given of a prefabricated staircase step unit made of steel frames according to the present invention. As shown in FIGS. 1 and 2, the prefabricated steel frame staircase of the present invention is, for example, connected to a steel frame bracket (not shown), which is a frame of an outer wall of a building, and a support (not shown) using fasteners such as bolts and nuts. The lower landing 1 and the upper landing 2, which are connected and firmly fixed, are bolted on the upper and lower ends and fixed on both sides.・ Connect with nuts and other fasteners, and connect stepboard units 4,4,. Handrails 5 and 5 are connected firmly with fasteners such as bolts and nuts and firmly fixed and installed.

As shown in FIG. 2, the assembled staircase unit 4 for stairs made of steel of the present invention is sandwiched between the slab beams 3 on both sides of the stairs, and is a rivet-joining type such as a bolt and a nut or an abdélock or a bolt. A supporting bracket 4A whose both ends are connected to the slab 3 by joining type fasteners 6, a plate-shaped silencer 4B having the same width as the supporting bracket 4A and being superimposed on the supporting bracket 4A, and the same as the supporting bracket 4A. The supporting bracket 4A has a width and is soaked in a zinc-plated tread 4C which is superimposed on the plate-shaped silencer 4B. 4A1 and 4A1, and is configured to be connected to the mounting portion 4A1 by a fastener 6 through a hole formed in the slab 3 and further to an upper edge 4A2. The tread plate 4C is extended so as to be closer to the upper stage than the plate-shaped muffler 4B and is bent so as to hide the plate-shaped muffler 4B. The tread plate 4C has the same width as the support bracket 4A, and has a tread surface portion 4C1. The nose portion 4C2 hanging downward and the rising portion 4C3 rising upward extend from both edges of the nose portion, and the nose portion 4C2 and the rising portion 4C3 have a click angle θ. The bracket 4A, the plate-shaped silencer 4B, and the tread 4C are perforated and connected by a rivet-type or bolt-type fastener 7, such as a bolt and a nut or an abdélock.

The support bracket 4A is formed, for example, by subjecting a 3.2 mm or 4.5 mm thick skin steel plate to a bending process and a mounting hole, and then dipping and galvanizing. The plate-shaped silencer 4B can be a rubber plate made of, for example, urethane rubber having a thickness of 3 mm, and is formed with a mounting hole. The plate-shaped silencer 4B attenuates metal-specific high-cycle vibration generated in the tread 4C when ascending and descending. Generation of noise can be effectively prevented. The tread 4C is formed, for example, by bending a striped steel plate having a thickness of 4.5 mm or 6.0 mm and further processing a mounting hole, and then galvanizing it.

[0009]

[Effect of the invention]

 The assembling type steel staircase stepboard unit of the present invention has the above-described structure. (1) The stepboard 4C hangs down on both edges of the tread surface section 4C1 and the step nose section 4C2 and the rising kick. The raised portion 4C3 is extended to secure the strength not to bend by the depressing force and to transmit the depressing force to the plate-shaped silencer 4B, so that the sound can be effectively silenced and the support bracket 4A has a large area. The support bracket 4A is bent to cover the plate-shaped silencer 4B in combination with receiving the stepping force, so that reliability in structural strength can be secured. Therefore, it has sufficient soundproofing properties, and can be applied to galvanized dip galvanized to provide corrosion resistance. Has sufficient fire resistance. (2) When going up and down the stairs, the differently colored plate-like silencers behind the stairs are blindfolded so that they do not become an obstacle. (3) The galvanizing equipment does not need to be large. (4) Large trucks and cranes do not need to be transported to the installation location.

[Brief description of the drawings]

FIG. 1 is a plan view of an assembling steel staircase to which an assembling steel frame staircase unit according to an embodiment of the present invention is assembled.

FIG. 2 is an ll-ll sectional view in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower landing 2 Upper landing 3 Sasara girder 4 Step board unit 4A Support bracket 4A1 Attachment part 4A2 Edge 4B Plate muffler 4C Tread plate 4C1 Tread surface part 4C2 Step nose part 4C3 Kick-up part 5 Handrail fastener 6 Fastener Ingredient

Claims (1)

[Utility model registration claims] 1. A support bracket which is sandwiched between a pair of girders on both sides of a stair and has both ends connected to the girders by fasteners;
It consists of a plate-shaped silencer that is the same width as the support bracket and overlaps the support bracket, and a tread that is the same width as the support bracket and overlaps the plate-like silencer. And has a mounting portion that bends and extends in contact with the slab girder, and is configured to be connected to the mounting portion with a fastener through a hole formed in the slab girder. The muffler has a shape that extends toward an upper level than the muffler and is bent so as to hide the muffler. The tread is the same width as the support bracket, and the treads are provided on both edges of the tread portion. The nose part and the kick-up part that rises upward extend, and the step nose part and the kick-up part have a cut-out angle, and the support bracket, the plate-shaped silencer, and the tread plate form a hole. Opened and connected by fasteners Characterized in that it is a configuration, prefabricated steel manufactured stair stepped plate unit.