JPH07324449A - Stair installing structure - Google Patents

Abstract

PURPOSE:To make installation work executable simply without being complicated, and to apply fireproof coating easily to a beam even though the beam is in a part of a building in fireproof structure. CONSTITUTION:A stair installing metal fixture 4 is formed with a connecting piece 2 provided to the surface of a cover piece 1 and a fixing piece 3 provided to the reverse side of the cover piece 1. A space 25 with an opening facing downward is provided between the cover piece 1 and the fixing piece 3. The stair installing metal fixture 4 is arranged to a beam 5 with the cover piece 1 covering the side of the beam 5, and the stair installing metal fixture 4 is fixed to the beam 5 with the fixing piece 3 fixed to the beam 5. By attaching the stair installing metal fixture 4 to the beam 5, the cover piece 1 for covering the side of the beam 5 and a connecting piece 2 for fixing a stain 7 can be provided simultaneously to the beam 5. Furthermore, fireproof coating can be applied to the beam 5 without being obstructed by the stair installing metal fixture 4 with fixing piece 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting stairs installed on an outdoor balcony or the like.

[0002]

2. Description of the Related Art A staircase is mounted with its upper end and lower end fixed to a beam, and FIGS. 4A and 4B show a conventional staircase mounting structure. The beam 5 is formed into an I-shaped cross section by providing an upper flange 5b and a lower flange 5c on the web 5a, and a pair of stair support hardware 11 is attached to one side surface of the web 5a. The staircase support hardware 11 is formed by vertically extending a coupling piece 11b approximately at the center of the fixing piece 11a.
To the beam 5 with the connecting piece 11b protruding from the side surface of the beam 5 by fixing the beam to the web 5a.
Is attached. The stairs 7 are formed by arranging a plurality of steps 7b between a pair of side girders 7a.

Then, the upper end of each side girder 7a is fixed to each coupling piece 11b with the uppermost step plate 7b removed, and the base material 9 made of wood or the like is used inside the upper flange 5b of the beam 5 and the lower flange. 5C is attached inside, and the upper and lower ends of the face material 10 are fixed to the upper and lower base materials 9, respectively, and the face material 10 is attached so as to cover the outer surface of the beam 5, and the uppermost step plate 7b is attached to the side girder 7a. The stairs 7 are attached to the beams 5 by erection.

[0004]

However, when the stairs 7 are attached to the beams 5 as described above, the work space is narrow when the stairs 7 are attached to the beams 5 by the stair support hardware 11, so that the base material is There is a problem that it is difficult to attach 9 or the face material 10, the construction becomes complicated, and in some cases, the construction becomes difficult.

Further, in a building such as an apartment having a fireproof structure, it is necessary to spray rock wool or the like on the beam 5 to form a fireproof coating. However, when the fireproof coating is formed on the beam 5 as described above, the fireproof coating is formed. Since the surface of the beam 5 is covered, it becomes difficult to attach the base material 9, and as described above, the face material 10
However, there is a problem that the construction of covering the beam 5 becomes more difficult.

The present invention has been made in view of the above points, and the construction can be carried out easily without being complicated.
Further, it is another object of the present invention to provide a stairway mounting structure that enables the construction of a fireproof structure to be easily performed even for a building beam having a fireproof structure.

[0007]

A staircase mounting structure according to the present invention forms a staircase mounting hardware 4 by providing a connecting piece 2 on the surface of a cover piece 1 and a fixing piece 3 on the back surface of the cover piece 1. A space 25 opening downward is provided between the cover piece 1 and the fixing piece 3, and the staircase mounting hardware 4 is arranged on the beam 5 and fixed to the beam 5 so that the cover piece 1 covers the side surface of the beam 5. It is characterized in that the piece 3 is fixed and the stair mounting hardware 4 is attached to the beam 5, and the end of the stair 7 is fixed to the connecting piece 2 of the stair mounting hardware 4.

[0008]

Operation: The connecting piece 2 is provided on the front surface of the cover piece 1, and the fixing piece 3 is provided on the rear surface of the cover piece 1, so that the stairs mounting hardware 4 is provided.
And a space 25 opening downward is provided between the cover piece 1 and the fixed piece 3, and the staircase mounting hardware 4 is arranged on the beam 5 so that the side surface of the beam 5 is covered with the cover piece 1 and the beam 5 is formed. 5
Since the fixing piece 3 is fixed to and the stair mounting hardware 4 is attached to the beam 5, by attaching the stair mounting hardware 4 to the beam 5, the cover piece 1 that covers the side surface of the beam 5 and the connecting piece 2 that fixes the stair 7 are attached. At the same time, it can be provided on the beam 5, and it becomes unnecessary to attach a base material to the beam 5. Further, by spraying the fireproof coating material onto the space 25 between the cover piece 1 and the fixed piece 3, the beam 5 can be subjected to the fireproof coating treatment without the staircase mounting hardware 4 interfering.

[0009]

EXAMPLES The present invention will be described in detail below with reference to examples. Figure 1
Shows the mounting structure of the stairs 7 on the upper floor.
The beam 5 is formed to have an I-shaped cross section by providing an upper flange 5b and a lower flange 5c on the web 5a, and an upper floor 12 composed of concrete or the like is formed above the upper flange 5b. On the upper surface of the base floor 12, a floor material 13 that constitutes the floor of the upper floor is laid. Also the lower flange 5c
A base frame member 14 is disposed below the base plate in parallel with the longitudinal direction of the beam 5, and an end portion of a ceiling board 15 on the lower floor is attached to the base frame member 14. Further, a curtain plate mounting hardware 8 having an L-shaped cross section is attached to the tip of the lower flange 5c of the beam 5 with bolts and nuts.

A staircase mounting hardware 4 is provided on the side surface of the beam 5. The staircase mounting hardware 4 is a beam 5 as shown in FIG.
Cover piece 1 formed of a flat plate extending in the direction parallel to the longitudinal direction of the cover piece, and a pair of connecting pieces 2 projecting from the surface of the cover piece 1.
And a fixed piece 3 which is formed in an inverted L-shape in cross section from the horizontal piece 3a and the vertical piece 3b, and which has the tip of the horizontal piece 3a fixed to the back surface of the cover piece 1 so as to project from the cover piece 1. 1 and vertical piece 3b
And a reinforcing piece 16 provided between the and.
A pair of upper and lower bolt holes 17 are formed at both ends of each of the connecting pieces 2 and the vertical piece 3b of the fixed piece 3, and bolt holes 17 are also formed at both end portions of the horizontal piece 3a. There is. A space 25 is formed between the cover piece 1 and the vertical piece 3b of the fixed piece 3 by the horizontal piece 3a.
An opening 26 communicating with the space 25 is provided in the lower portion of the cover piece 1 to open the space 25 downward.

In this staircase mounting hardware 4, the horizontal piece 3a of the fixed piece 3 is arranged along the lower surface of the upper flange 5b of the beam 5, and the vertical piece 3b of the fixed piece 3 is arranged along the web 5a of the beam 5 to form the beam 5.
The horizontal piece 3a is provided on the outer surface of the horizontal piece 3a, and bolts are inserted into the upper flange 5b from the bolt holes 17 of the horizontal piece 3a.
Is fixed to the upper flange 5b, and bolts are inserted into the web 5a from the respective bolt holes 17 of the vertical piece 3b, and the vertical piece 3b is fixed to the web 5a with a bolt nut so that the vertical piece 3b is attached to the beam 5. By attaching the stair mounting hardware 4 to the beam 5 in this manner, the upper side surface of the beam 5 is covered with the cover piece 1, and the lateral piece 3a of the fixed piece 3 is also provided.
The upper part of the cover piece 1 on the upper side is projected upward from the beam 5.

After mounting the staircase mounting hardware 4 in this manner, an inorganic material such as rock wool is sprayed on the outer surface of the beam 5 to provide the fireproof coating layer 18. At the portion of the beam 5 to which the staircase mounting hardware 4 is attached, the fireproof coating layer 18 can be provided by inserting a nozzle or the like into the space 25 from the opening 26 and spraying an inorganic material such as rock wool.

A curtain plate 6 is attached to the lower side of the cover piece 1. The curtain plate 6 is formed as a flat plate that is long in the direction parallel to the longitudinal direction of the beam 5, and the upper end of the curtain plate 6 is fixed to the lower end of the cover piece 1 and the lower end of the curtain plate 6 is fixed to the upper end of the curtain plate mounting hardware 8. By doing so, the beam 5 is attached so as to cover the lower side surface. In the figure, 19 is the curtain plate 6.
It is a balcony drainer that is arranged from the lower end of the base frame material 14 to cover the outer surface of the fireproof coating layer 18. Further, the base floor 12 can be constructed by attaching the staircase mounting hardware 4 to the beam 5 as described above, and then pouring concrete on the deck plate 30 stretched over the beam 5. The upper part of the cover piece 1 protruding upward has a function of blocking the concrete at this time.

In the stairs 7, a pair of side girders 7a are arranged so as to face each other, and the end portions of the treads 7b are fixedly mounted on the tread plate supporting portions 20 provided on the inner side surfaces of the side plates 7b. It is formed by installing 7b. The tread support portion 20 has a substantially U-shaped receiving portion 20a whose upper surface is open, and a lower receiving portion 20a which extends from the lower surface of the upper receiving portion 20a.
It is formed by a vertical piece 20b connected to a and a reinforcing plate member 20c attached to the lower surface of the tread 7b with screws or the like.

The stairs 7 can be attached to the beams 5 by fixing the upper ends of the side girders 7a of the stairs 7 to the connecting pieces 2 of the stair mounting hardware 4, respectively. Connecting piece 2
The side girder 7a can be fixed to the side girder 7a by a bolt nut 31 that is passed through the bolt hole 17 of the side piece 7a and the connecting piece 2. At this time, the upper surface of the uppermost step plate 7b of the stairs 7 is positioned at substantially the same height as the upper surface of the floor material 13 above the beam 5, and a waterproof material 21 is provided between the step board 7b and the floor material 13.
Is fitted.

As described above, by only fixing the fixing piece 3 of the staircase mounting hardware 4 to the web 5a of the beam 5 and attaching the stairway mounting hardware 4 to the beam 5, the staircase mounting hardware is covered so as to cover the upper side surface of the beam 5. The cover piece 1 of 4 can be arranged, and at the same time, the connecting piece 2 for attaching the stairs 7 can be projectingly provided on the side surface of the beam 5. Beam 5
Even when the refractory coating layer 18 is formed on the outer surface of the staircase mounting hardware 4 by inserting a nozzle or the like into the space 25 from the opening 26 of the cover piece 1 and spraying an inorganic material onto the outer surface of the beam 5. The refractory coating layer 18 can be formed without disturbing. As described above, the upper side surface of the beam 5 can be covered with the cover piece 1, and the lower side surface of the beam 5 can be covered with the cover piece 1 and the curtain plate mounting hardware 8.
Since it can be covered with the curtain plate 6 fixed to the beam 5, it is not necessary to provide the beam 5 with another member for fixing the cover piece 1 and the curtain plate 6 unlike the base material 9 of the conventional example.

FIG. 2 shows the mounting structure of the stairs 7 on the lower floor. The lower floor is also formed in the same manner as the above upper floor, and the upper floor 5 of the beam 5 is formed with an upper floor 12 composed of concrete or the like, and the upper surface of the lower floor 12 is formed. A floor material 13 that constitutes the floor of the lower floor is laid on the floor. The base frame member 1 is provided below the lower flange 5c.
4 are arranged in parallel with the longitudinal direction of the beam 5, and the base frame member 14 is provided with an end portion of a ceiling plate 15 on a lower floor of the lower floor. At the tip of the lower flange 5c of the beam 5, a curtain plate mounting hardware 8 having an L-shaped cross section is mounted with bolts and nuts.

The side wall of the beam 5 is provided with the stair mounting hardware 4 similar to the above, and the outer surface of the beam 5 is provided with the fireproof coating layer 18 by the same method as described above. And stairs 7
The lower end of each side girder 7a of each of the connecting pieces 2 of the stair mounting hardware 4
The stairs 7 are attached to the beams 5 by fixing the bolts and nuts 31 to the beams 5, respectively. At this time, the upper surface of the bottom tread 7b of the stairs 7 is positioned at substantially the same height as the upper surface of the floor material 13 above the beam 5.

[0019]

As described above, according to the present invention, the connecting piece is provided on the front surface of the cover piece and the fixing piece is provided on the rear surface of the cover piece to form the stair mounting hardware, and the downward fitting is provided between the cover piece and the fixing piece. The staircase mounting hardware was attached to the beam by providing a space for opening, covering the side surface of the beam with the cover piece, and fixing the fixing piece to the beam to attach the staircase mounting hardware to the beam. By attaching to the beam, the cover piece that covers the side surface of the beam and the connecting piece that fixes the stairs can be formed on the beam at the same time, and the construction can be performed easily without being complicated. Further, by spraying the fireproof coating material into the space between the cover piece and the fixed piece, it is possible to easily carry out the work of fireproof coating the beam without the stair mounting hardware being in the way.

[Brief description of drawings]

FIG. 1 is a sectional view showing an upper floor portion of an embodiment of the present invention.

FIG. 2 is a sectional view showing a lower floor portion of another embodiment of the above.

FIG. 3 is a perspective view showing a staircase mounting hardware of the same.

4A is an exploded perspective view and FIG. 4B is a sectional view of a conventional example.

[Explanation of symbols]

 1 Cover Piece 2 Connecting Piece 3 Fixed Piece 4 Stair Mounting Hardware 5 Beam 7 Stair 25 Space Part 26 Opening

Claims (1)

[Claims] 1. A cover piece is provided with a connecting piece and a back piece of the cover piece is provided with a fixing piece to form a stair mounting hardware, and a space opening downward is provided between the cover piece and the fixing piece. Place the stair mounting hardware on the beam so as to cover the side surface of the beam with one piece, fix the fixing piece to the beam to attach the stair mounting hardware to the beam, and fix the end of the stair to the connecting piece of the stair mounting hardware. Mounting structure for stairs characterized by