JPH054496Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention consists of a tread section and a continuous bending section extending downward from its front end between two side girders installed across the upper and lower landings. The present invention relates to a steel assembly staircase in which a zigzag-shaped stairway is formed by constructing a plurality of steps consisting of a riser board portion and a raised board portion.

[Conventional technology]

In general, for stairs, the correlation between the riser dimension (height between the tread parts) and the front-to-back width of the tread (the front-back dimension of the tread parts) is determined to be 450 m/m in total.
It is considered desirable from an ergonomic point of view to set the height so that the width of the riser is about 180m/m and the width of the front and back of the tread is about 270m for regular stairs.
It is often set to about m/m.

The number of steps of a staircase is determined from the floor height of the building and the above-mentioned riser dimensions, and for fractions of the number of steps,
This can be absorbed by setting the riser size a little larger or by increasing the number of steps by one step by setting the riser size a little smaller.

By the way, the width of stairs is generally constant depending on the purpose of the building, such as apartment complexes or office buildings.
Floor heights vary from building to building even if the purpose is the same, and therefore the riser dimensions and number of steps of stairs also differ from building to building.

In the past, the number of steps and riser dimensions were determined according to the floor height of the building, and the stairs were designed and manufactured each time, resulting in lack of versatility and high cost.
There was room for improvement on this point.

Conventionally, steel stairs are manufactured by welding steps to the stringers, but since construction sites are susceptible to fire restrictions, steel stairs are manufactured in a factory and then brought to the site. It was being brought in. Therefore, bulky and heavy steel stairs had to be transported, which increased transportation costs and required heavy machinery to load and unload the steel stairs.

[The problem that the idea aims to solve]

The present invention was devised in view of the above-mentioned circumstances, and by standardizing and generalizing the steps so that they can accommodate changes in floor height, it simplifies the design and manufacture of steel stairs and reduces costs. The purpose of the present invention is to provide a steel assembly staircase that can be assembled on-site, thereby reducing transportation costs and eliminating the need for heavy machinery for loading and unloading.

[Means to solve the problem]

In order to achieve the above purpose, the present invention has been developed to provide a steel assembly staircase as described at the beginning, in other words, between two stringers installed across the upper and lower landings, from the tread part and its front end downwards. In a steel assembly staircase in which a zigzag-shaped step bed is formed by constructing a plurality of steps consisting of risers that are bent and connected in series, a vertical groove is provided at one end of the step in the vertical direction. The other end of the step is provided with an insertion portion corresponding to the groove, so that the amount of insertion between the groove of the vertically adjacent step and the insertion portion can be adjusted, and the step is connected to both sides of the step. The flange portion and the stringer are each connected and fixed via screw type connectors.

[Effect]

According to the characteristic configuration described above, by installing the two stringers across the upper and lower landings and sequentially erecting steps across the two stringers, a zigzag-shaped step bed is created. It is formed.

By adjusting the amount of insertion of the insertion part into the groove, a fraction of the number of steps determined from the floor height of the building and the riser dimensions is absorbed.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a steel assembled staircase 2 spanning a certain floor and landings 1, 1 between the upper and lower floors, and FIG. 2 shows a cross section of the steel assembled staircase 2. The steel assembly staircase 2 has two stringers 3, 3 installed facing each other at a predetermined interval across the upper and lower landings 1, 1, and two stringers 3, 3 installed across the two stringers 3, 3. A plurality of steps 4A, 4..., 4B are installed to form a zigzag-shaped stepped floor. 5 is a handrail provided on one side girder 3.

The above-mentioned side girder 3 is made of a thin bent sheet metal, and as shown in FIGS. 4 and 5, bent face plates b, b are bent and connected above and below an intermediate face plate a. A reinforcing stringer 3A in which upper and lower face plates c and c are bent and connected to face plates b and b, respectively, and a hollow main body 3B in which a flange d for temporary step placement is connected to the lower end side.
As shown in FIG. 2, on both upper and lower sides of the surface portion of the main body 3B to which the flange d is connected, there are angle members 6, for installing a girder.
6 is provided.

On the other hand, an anchor bolt e is buried in each end of the landing 1, and a supporting angle member 7 is attached to the bolt e.
A girder 3 is attached to the upper and lower support angle members 7 via the angle members 6, 6.

The steps 4A, 4...4B are also made of thin bent sheet metal, and as shown in FIG. 2, the intermediate steps 4... except for the lowest and highest steps 4A, 4B are all of the same shape. It is. The intermediate step 4, as also shown in FIGS. 3 to 5,
A horizontal tread plate part 4b is bent and connected to the upper part of the riser plate part 4a, and a flange part 4c for connection to the above-mentioned stringer 3 is connected to the riser plate part 4a and the tread plate part 4b.
At one end of the step 4 in the vertical direction, that is, at the end of the step board 4b, there is a part f bent downward and a part f bent upward from the lower end of the step 4. A vertical groove 4d consisting of a lattice-shaped portion g is provided, and an insertion portion 4e corresponding to the groove 4d is provided at the other end of the step 4 in the vertical direction. An anti-slip edging material 8 is attached to the front edge of the tread portion 4b, and decorative materials 9, such as vinyl tiles, are attached to the upper surface of the tread portion 4b and the front surface of the riser portion 4a, respectively.

As shown in FIG.
A has a configuration in which the riser plate portion 4a of the intermediate step 4 is omitted, and the topmost step 4B
This is a configuration in which the groove portion 4d of the intermediate step 4 is omitted, and mounting face plates 4f, 4f for the landings 1, 1 are provided in series.

Next, the procedure for constructing a steel assembly staircase at a construction site will be explained.

First, the two stringers 3, 3 are installed facing each other at a predetermined interval across the upper and lower landings 1, 1, and the flanges d, d of the two stringers 3, 3 are installed facing each other at a predetermined interval.
Temporarily place the groove 4d of the groove 4A of the lowest step 4A on top, and then
are attached to each of the two stringers 3, 3.

The attachment of the step 4A to the stringer 3 and the attachment of the intermediate step 4 and the highest step 4B to the stringer 3, which will be described later, are both carried out in the same manner. With the positions set as specified, pilot holes are drilled in the flanges 4c on both sides of the step, the reinforcement 3A of the stringer 3, and the main body 3B.
For example, a screw-type connector h such as a self-tapping screw is screwed into the lower hole and attached.

Next, with the groove portion 4d of the intermediate step 4 temporarily placed on the flanges d, d of the two stringers 3, 3, the riser plate portion 4a of the step 4 is removed.
The insertion part 4e at the lower end of the mortar 10 is inserted into the groove part 4d of the lowest step 4A, and the mortar 10 to be placed later on the lowest step 4A is inserted.
Adjust the insertion amount of the insertion portion 4e into the groove portion 4d so that the height dimension between the upper surface of the upper decorative material 9 and the upper surface of the tread portion 4b of the intermediate step 4 is as specified, and in this state, the insertion amount of the insertion portion 4e into the groove portion 4d is adjusted. As mentioned above, the flanges 4c on both sides of the step are attached to the stringer 3 by threaded connections h. still,
A pilot hole is bored in both the groove portion 4d and the insertion portion 4e, and a threaded connector i (shown by a chain line in FIG. 2) such as a self-tapping screw is screwed into the pilot hole. The groove portion 4d and the insertion portion 4e of the riser plate portion may be integrally connected.

Hereafter, although there is a difference between the lowest step 4A and the intermediate step 4, the lowest step 4A will be regarded as the intermediate step 4, and the groove 4d will be
By adjusting the amount of insertion of the insertion part 4e of the riser part 4a into the intermediate step, and setting the riser dimension (height dimension of the tread part 4b) of vertically adjacent steps 4, 4 to a predetermined value, 4 is attached across the girders 3 and 3.

Then, once the uppermost intermediate step 4 is installed, the groove 4 of the uppermost intermediate step 4 is attached.
Insert the insertion part 4e at the lower end of the riser plate 4a of the uppermost step 4B into the uppermost step 4B, and connect the upper surface of the decorative material 9 on the mortar 10 that will be cast on the uppermost step 4B later and the intermediate part. The insertion portion 4 is inserted into the groove portion 4d so that the height of the step 4 with respect to the upper surface of the footboard portion 4b is a predetermined height.
The amount of insertion of e is adjusted, and in this state, as described above, the flanges 4c on both sides of the step and the above-mentioned flute girder 3 are integrally connected by the screw type connector h.

With the above steps, the stair A of the steel assembly staircase 2 is constructed.Then, the ceiling decorative material 11 is attached to the flanges d, d of the stringers 3, 3, and the stair A of the stair A is constructed. By covering the lower side with good appearance and attaching the handrail 5 to the girder 3, a steel assembly staircase 2 spanning the upper and lower landings 1, 1 is manufactured.

Note that, as shown in FIG. 6, the footboard portion 4b of the step 4 is divided into two parts in the front-rear direction, and flanges j, j that are bent downward are connected to the edges of the divided parts, and Applicable flanges j, j
They may be joined together by spot welding or the like, thereby strengthening the tread portion 4b structurally. In particular, as shown in FIG. 7, the footboard portion 4b is divided into two in the front and back direction, and the divided portions are partially overlapped and joined by spot welding or the like, while the edge of the lower divided portion is By bending and connecting the flanges k, it is possible to not only strengthen the tread portion 4b structurally, but also to adjust the overlapping margin of the divided portions to increase the longitudinal width of the tread (the longitudinal dimension of the tread portion 4b). It has the advantage of being able to be set arbitrarily.

Further, in the embodiment, the step plate portion 4b of the step 4 is
As shown in FIG. 8, the groove portion 4d is provided on the lower end side of the riser plate portion 4a, and the corresponding insertion portion 4e and tread portion 4b are provided in the groove portion 4b.
It may also be carried out by bending the rear end side.

[Effect of idea]

As explained above, the present invention makes it possible to adjust the amount of insertion of the insertion part into the groove between adjacent steps in the vertical direction, adjust the riser dimension, and calculate the fraction of the number of steps calculated from the floor height and riser dimension. This makes it possible to standardize and generalize the steps so that they can accommodate changes in floor height. Therefore, if a large number of the above steps are manufactured in advance, After that, all you have to do is design and manufacture the stringers based on the vertical height dimensions between the upper and lower landings and the number of steps, and you can manufacture the stairs extremely easily and in a short period of time. It is possible to achieve cost reduction through simplification and mass production.

Moreover, it is easy to assemble and does not require fire, making it suitable for on-site production.By producing the stairs on-site, transportation costs can be reduced, and heavy machinery for loading and unloading is not required. Overall, the object of the present invention has been achieved through simple and rational improvements.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a steel assembly staircase, FIG. 2 is a vertical side view of the steel assembly staircase, FIG. 3 is a longitudinal side view of the step, and FIG. FIG. 5 is an exploded perspective view of a part of the steel assembly staircase, and FIG. 5 is a longitudinal sectional front view of the steel assembly staircase. 6 to 8 are longitudinal sectional side views of steps showing other embodiments of the present invention. 1...Landing, 3...Sara girder, 4, 4A, 4
B...Step, 4a...Riser board section, 4b...
Stepboard portion, 4c...Flange portion, 4d...Groove portion, 4
e...Insertion part, h...Screw type connector.

Claims (1)

[Scope of utility model registration request] A zigzag structure is constructed by constructing a plurality of steps consisting of a tread section and a riser section bent downward from the front end of the tread section between the two stringers installed across the upper and lower landings. A steel assembly staircase with a step bed formed in the shape of a shape, wherein a vertical groove is provided at one end of the step in the vertical direction, and an insertion portion corresponding to the groove is provided at the other end. The amount of insertion between the groove portion of the step adjacent to the step and the insertion portion is configured to be adjustable, and the flange portions connected on both sides of the step and the stringer are connected and fixed via screw-type connectors, respectively. A steel assembly staircase characterized by: