JPH054510B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a prefabricated staircase for houses, shops, etc., which is constructed by connecting a plurality of upper and lower staircase units.

[Prior Art] Conventional prefabricated stairs disclosed in Japanese Patent Publication No. 13460/1980, Publication No. 26487/1987, Publication of Japanese Utility Model Publication No. 153635/1982, and Japanese Patent Application Laid-open No. 1761/1983, A cylindrical upward joint body and a cylindrical downward joint body are vertically protruded from the base end plate and the tip of the board, and a fixing bolt is vertically protruded from the center of the upper end of the upward joint body. A stair unit with a fixed horizontal seat plate is used, and the upward joint body and downward joint body of the upper and lower stair units that are rotatably fitted to each other are connected between the upper nut body and the lower nut body screwed to the fixing bolt. The horizontal seat plate is clamped and fixed by sandwiching the horizontal seat plate between the horizontal seat plates.

[Problems to be Solved by the Invention] However, in this prefabricated staircase, the fixing bolt is placed on the vertical center line of the upward joint body, so if the bolt becomes loose for some reason, the upward joint body and The downward joint bodies become mutually rotatable, and there is a risk that the assembled state of the upper and lower stair units will be distorted due to the rotational moment due to the weight of each stair unit, causing the stairs to sag or swing as they rotate.

When using materials such as stone as treads, this tendency is exacerbated by the weight of the treads being added to the weight of each stair unit, so be careful when tightening bolts when assembling each stair unit. Moreover, it needs to be done firmly and requires considerable effort, resulting in poor work efficiency. In some cases, it may be necessary to weld the tightening bolts to prevent them from loosening, but this detracts from the inherent advantages of prefabricated staircases.

Therefore, an object of the present invention is that the arrangement angle and height interval between the upper and lower stair units can be adjusted, so that it can be widely used in a variety of buildings with different installation modes, and that spiral staircases and stairs with landings can be assembled as desired. To provide a prefabricated staircase which can be constructed and which prevents the stairway as a whole from sagging or swinging because rotational behavior between stair units is suppressed after assembly.

[Means for Solving the Problems] The prefabricated staircase of the present invention will be described below using the reference numerals in the attached drawings. The prefabricated staircase of the present invention includes a rectangular cylindrical upward joint body 2 at the base end and the distal end of the horizontal base plate 1. A rectangular cylindrical downward joint body 3 is vertically protruded, a longitudinal long hole 4 is provided in the upward joint body 2, a nut portion 5 is fixedly attached to the downward joint body 3, and the upper joint body 3 is fitted non-rotatably with each other. A staircase unit 7 for a straight section in which a lower upward joint body 2 and a downward joint body 3 are tightened and fixed by a bolt 6 screwed into a nut part 5 from an elongated hole 4; A cylindrical upward joint body 8 and a cylindrical downward joint body 9 are vertically protruded from the upper joint body 8, and a fixing bolt 1 is installed at the center of the upper end of the upward joint body 8.
0 protrudes vertically, a horizontal seat plate 11 is fixed in the downward joint body 9, and the upper and lower joint bodies 8 and 9 of the upper and lower stages, which are rotatably fitted to each other, are screwed to the fixing bolt 10. A curved part stair unit 14 that is tightened and fixed by sandwiching the horizontal seat plate 11 between the upper nut body 12 and the lower nut body 13;
A rectangular cylindrical upward joint body 2 and a cylindrical downward joint body 9 are provided vertically protruding from the base end and the distal end of the horizontal substrate 1, and a vertical elongated hole 4 is provided in the upward joint body 2, and the downward joint body A horizontal seat plate 11 is fixedly installed in the stairway unit 9, and the upward joint body 2 is connected to the downward joint body 3 of the stair unit 7.
The downward joint body 9 is rotatably fitted into the upward joint body 8 of the stair unit 14, and the downward joint body 9 is rotatably fitted into the upward joint body 8 of the stair unit 14. and a stair unit 15 for switching from a curved part to a straight part, which is tightened and fixed by sandwiching a horizontal seat plate 11 between an upper nut body 12 and a lower nut body 13 screwed onto a fixing bolt 10. ; A cylindrical upward joint body 8 and a rectangular cylindrical downward joint body 3 are vertically protruded from the base end and the distal end of the horizontal board 1, and a fixing bolt 1 is installed at the center of the upper end of the upward joint body 8.
0 protrudes vertically, and a nut portion 5 is attached to the downward joint body 3.
is fixedly installed, and the upward joint body 8 is attached to the stair unit 1.
4 is rotatably fitted to the downward joint body 9, and is tightened and fixed by sandwiching the horizontal seat plate 11 between the upper nut body 12 and the lower nut body 13 screwed onto the fixing bolt 10, The downward joint body 3 is non-rotatably fitted to the upward joint body 2 of the stair unit 7, and is tightened and fixed by a bolt 6 screwed into the nut part 5 from the elongated hole 4. A switching stair unit 16; A prismatic downward joint body 3 at the tip of the horizontal board 1;
is vertically protruding, a nut part 5 is fixed to the downward joint body 3, and the downward joint body 3, which is non-rotatably fitted to the upward joint body 2 of the stair unit 7, is screwed into the nut part 5 from the elongated hole 4. A top staircase unit 17 is tightened and fixed by bolts 6 inserted into the top, and the horizontal base plate 1 is fixed to the floor structure of the upper floor; A vertical through hole 4 is provided in the upward joint body 2, and the upward joint body 2, which is non-rotatably fitted to the downward joint body 3 of the stair unit 7, is screwed into the nut portion 5 through the through hole 4 with a bolt 6. The stair unit 18 for the base is fastened and fixed by the horizontal base plate 1 to the floor structure of the lower floor; and the tread plate 19 is fixed to the upper surface side of the horizontal base plate 1 of each stair unit. .

[Operation] The prefabricated staircase of the present invention can be assembled from the lower floor side to the upper floor side, or can be assembled from the upper floor side to the lower floor side, but for example, from the lower floor side When assembling, as shown in Fig. 2, the horizontal board 1 of the base stair unit 18 is
1 is tightened and fixed to the floor structure 20 of the lower floor.

As shown in FIG. 1, when a straight section continuous to the floor structure of the upper and lower floors is constructed with the straight section stair unit 7, when a curved section such as a landing in the middle is constructed with the curve section stair unit 14. As shown in FIG. 2, the downward joint body 3 of the first stage straight part stair unit 7 is fitted into the upward joint body 2 of the base stair unit 18, and the upward joint body 2 and the downward joint body 3 are tightened and fixed by bolts 6. The bolt 6 and the turning operation tool are inserted through the upper openings of the upward joint body 2 and the downward joint body 3.

Next, as shown in FIG. 6, the downward joint body 3 of the stair unit 7 for the straight section of the second stage is fitted into the upward joint body 2 of the stair unit 7 for the straight section of the first stage. The joint body 2 and the downward joint body 3 are tightened and fixed with bolts 6. In this way, the upward joint body 2 of the lower straight part stair unit 7 is connected to the downward joint body 3 of the upper straight part stair unit 7.
By fitting the upward joint body 2 and the downward joint body 3 together with bolts 6 and fixing them, the straight portions on the lower floor side are sequentially assembled.

Straight section stair unit 7 at the top of the straight section
As shown in FIG. 5, the upward joint body 2 is provided with a stair unit 16 for switching from a straight section to a curved section.
The downward joint body 3 is fitted and secured by tightening with bolts 6. The upward joint body 8 of the switching staircase unit 16 has a curved section staircase unit 14.
The downward joint body 9 is fitted, and the upper nut body 12
The lower nut body 13 is tightened and fixed. As shown in Figure 4, the stair unit 1 for the lower curved section
Fit the downward joint body 9 of the upper curve part staircase unit 14 into the upward joint body 8 of 4, and tighten and secure the upward joint body 8 and the downward joint body 9 with the upper nut body 12 and the lower nut body 13. The curved sections are assembled in sequence.

Stair unit 1 for the uppermost curved section of the curved section
As shown in FIG.
The downward joint body 9 of 5 is fitted, and the upper nut body 1
2 and the lower nut body 13 are tightened and fixed. The downward joint body 3 of the straight section stair unit 7 is fitted into the upward joint body 2 of the switching stair unit 15, and is secured by tightening with bolts 6. As shown in FIG. 6, the downward joint body 3 of the upper straight part stair unit 7 is fitted into the upward joint body 2 of the lower straight part stair unit 7, and the upward joint body 2 and the downward joint body 7 are connected to each other. By tightening and fixing the body 3 with bolts 6, the upper and lower straight parts are sequentially assembled.

As shown in FIG.
are fitted, and the upward joint body 2 and the downward joint body 3
are tightened and fixed by bolts 6. Finally, the mounting plate 22 fixed to the base end of the horizontal base plate 1 of the top staircase unit 17 is fastened and fixed to the upper floor structure 24 with screws 23.

In the straight part on the upper floor side and the straight part on the lower floor side, the upward joint body 2 and the downward joint body 3 of the upper and lower straight stair units 7, 7 are fitted together in a non-rotatable manner. departmental staircase unit 7,
The arrangement angle between 7 and 7 on the horizontal plane cannot be changed. Base stair unit 18 and straight section stair unit 7
Also between the upward joint body 2 and the downward joint body 3
Since they are non-rotatably fitted into each other, the arrangement angle of both cannot be changed. Top staircase unit 17
Since the downward joint body 3 and the upward joint body 2 are non-rotatably fitted to each other between the straight part staircase unit 7 and the straight part stair unit 7, the arrangement angle of both cannot be changed.

Also between the straight section stair unit 7 and the switching stair unit 16, the upward joint body 2 and the downward joint body 3 are non-rotatably fitted to each other, so the arrangement angle of both cannot be changed. Switching staircase unit 1
5 and the straight section staircase unit 7, the upward joint body 2 and the downward joint body 3 are non-rotatably fitted to each other, so the arrangement angle of both cannot be changed.

In the curved part, the upward joint body 8 and the downward joint body 9 of the upper and lower curved part stair units 14, 4 are
Since the stair units 14 and 4 are rotatably fitted to each other, the arrangement angles of the upper and lower curved stair units 14, 4 can be continuously changed in the horizontal plane. Also between the switching stair unit 16 and the curved part stair unit 14, the upward joint body 8 and the downward joint body 9 are rotatably fitted to each other, so that the arrangement angle of both can be continuously changed. Stair unit for curved sections 1
4 and the switching staircase unit 15, the upward joint body 8 and the downward joint body 9 are rotatably fitted to each other, so that the arrangement angle of both can be continuously changed.

The height interval between the base stair unit 18 and the straight part stair unit 7 is adjusted by using the play length between the vertical long hole 4 and the bolt 6. Adjustment of the height interval between the upper and lower straight part stair units 7, 7 in the straight part on the lower floor side is performed using the long hole 4 in the vertical direction.
This is done every step, every few steps, or only at a specific step by utilizing the length of play between the bolts 6 and 6. Adjustment of the height interval between the straight section stair unit 7 and the switching stair unit 16 is performed using the length of play between the vertical elongated hole 4 and the bolt 6. The height interval between the switching stair unit 16 and the curved part stair unit 14 can be adjusted by adjusting the height between the upper nut body 12 and the lower nut body 1.
This is done by moving the screwing position for the fixing bolt 10 of No. 3 up and down.

The height interval between the upper and lower linear part stair units 14, 14 in the curved part can be adjusted by vertically moving the screwing positions of the upper nut body 12 and the lower nut body 13 with respect to the fixing bolt 10. Or it is done every few stages or only in a specific stage. The height interval between the curved part stair unit 14 and the switching stair unit 15 can be adjusted by using the upper nut body 1.
This is done by vertically moving the screwing positions of the bolt 2 and the lower nut body 13 with respect to the fixing bolt 10. Adjustment of the height interval between the switching stair unit 15 and the straight part stair unit 7 is performed using the length of play between the vertical elongated hole 4 and the bolt 6.

The height interval between the upper and lower straight stair units 7, 7 on the straight part of the upper floor can be adjusted every step or several steps by using the play length between the vertical long hole 4 and the bolt 6. Or it may only be done in certain stages.
The height interval between the straight part stair unit 7 and the top stair unit 17 is adjusted by using the play length between the vertical long hole 4 and the bolt 6.

In this way, the straight section staircase unit 7, the curved section staircase unit 14, the switching staircase unit 15, and the switching staircase unit 16 can be appropriately combined and used together with the top staircase unit 17 and the base staircase unit 18. Therefore, a straight staircase with a landing, a curved staircase with a curved part in part or with a main part sequentially curved, etc. are constructed, and a tread 19 is fixed to the horizontal base plate 1 of each staircase unit.

[Example] In the staircase unit 15 for switching from a curved section to a straight section shown in FIGS. 7 to 10, the downward joint body 9 is composed of a metal cylindrical body, and is a square cylindrical body made by bending a metal plate material. The upwardly facing joint body 2 is configured such that one side thereof is opened vertically. The elongated hole 4 of the upwardly facing joint body 2 is bored on three sides, and the ring-shaped horizontal seat plate 11 is welded to the inner surface of the intermediate portion of the downwardly facing joint body 9.

In the curved part staircase unit 14 shown in FIGS. 11 to 14, the upwardly facing joint body 8 and the downwardly facing joint body 9 are both constructed of metal cylindrical bodies, and the fixing bolt 10 is connected upwardly to the upper end of the joint body 8. The ring-shaped horizontal seat plate 11 is welded to the cover plate 26 and the downward joint body 9
It is welded to the inside surface of the middle part.

In the staircase unit 16 for switching from a straight section to a curved section shown in FIG. 15 to FIG. is welded to. The downward joint body 3 is constituted by a rectangular cylindrical body formed by bending a metal plate material, nut portions 5 are welded to three outer surfaces, and a bolt 6 is screwed into the nut portion 5 through a through hole 27.

In the straight section stair unit 7 shown in FIGS. 19 to 22, an upward joint body 2 and a downward joint body 3
Each of these is constructed of a rectangular cylindrical body made by bending a metal plate material, and the long holes 4 of the upward joint body 2 are bored on three sides, and the nut portions 5 of the downward joint body 3 are welded to the outer surfaces of three sides, and the bolts 6 is screwed into the nut portion 5 through the through hole 27.

In either stair unit, the upward joint bodies 2, 8 and the downward joint bodies 3, 9 are welded to the horizontal plate 1 together with an appropriate reinforcing plate to constitute the skeletal structure of the stair unit. In order to improve the appearance when installed inside, a cosmetic cover body 25 made of plastic molding is fitted.
The cover body 25 has a through hole 30 on the outer peripheral edge of the horizontal substrate 1.
It is fixed to the horizontal board 1 by tapping screws screwed into the horizontal board 1 before assembling the stairs.

If necessary, a washer with teeth on one side or teeth on both sides may be installed between the head of the bolt 6 and the upward joint body 2, between the upper nut body 12 and the horizontal seat plate 11, and between the lower nut body 13 and the horizontal seat plate 11. Insert the washer 28 with
If the washer 28 is bitten into each contact surface by tightening the bolt 6 or the upper nut body 12, extremely strong tightening and fixing can be achieved.

The tread plate 19 is attached to the horizontal board 1 by screwing screws into screw holes 29 drilled in the outer edge of the horizontal board 1.
However, in order to accurately set the tread plate 19 in a horizontal position, a level adjustment plate can be inserted between the tread plate 19 and the horizontal base plate 1. The level adjustment plate has four screws screwed into nuts welded to the lower surface of the outer periphery, and by increasing or decreasing the screwing depth of the screws, the level adjustment plate can be set in a horizontal state. , the footboard 19 that comes into contact with the upper surface is also set horizontally. Upper nut body 1
2 and the lower nut body 13 are provided with a slot 31 and a vertical hole 32 for insertion of a bifurcated rotation operating tool.

In another embodiment shown in FIGS. 23 to 35, a horizontal plate 33 is provided on the inner surface of the intermediate portion of the upward joint body 8.
are welded, and the fixing bolt 10 of the upward joint body 8 is welded to the center of the horizontal plate 33. Also,
The horizontal seat plate 11 of the downward joint body 9 is a pot-shaped cylindrical body 34
The upper end flange 3 of the cylindrical body 34
5 is fixed to the horizontal substrate 1 with screws 36. The other configurations and operations are the same as those of the previous embodiment. Note that the cross-sectional shapes of the upward joint bodies 2, 8 and the downward joint bodies 3, 9 are not particularly limited to those shown.

[Effects of the Invention] As described above, in the prefabricated staircase of the present invention, the height interval between the straight part stair units 7, 7, the step unit 15 for switching from a curved part to a straight part, and the straight part stair unit 7, 7, the height interval between the switching stair unit 15 and the curved part stair unit 14, the height interval between the curved part stair units 14, 14, and the height interval for switching from a straight part to a curved part. The height interval between the stair unit 16 and the stair unit 14 for the curved part, and the height interval between the switching stair unit 16 and the stair unit 7 for the straight part can be adjusted, and the height interval between the stair unit 15 for switching and the stair unit 7 for the curved part can be adjusted. Since the arrangement angle between the stair units 14, the arrangement angle between the curved part stair units 14, 14, and the arrangement angle between the curved part stair unit 14 and the switching stair unit 16 can be continuously adjusted, the installation mode can be adjusted. It can be widely used in a variety of buildings with different levels, and spiral staircases and staircases with landings can be assembled and constructed as desired.

In addition, the top staircase unit 17 is fixed to the floor structure 24 on the upper floor, the base staircase unit 18 is fixed to the floor structure 20 on the lower floor, and the straight part staircase is fitted and connected in a non-rotatable manner. Since the movement of the curved part stair unit 14 is regulated and restrained by the unit 7, the switching stair unit 15, and the switching stair unit 16, even if the stair unit receives rotational moment due to the weight of each stair unit or the weight of the tread,
Rotation and movement of the curved portion is suppressed, so that the staircase as a whole does not sag or swing.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing an assembled state of a prefabricated staircase according to an embodiment of the present invention, and FIG. 2 is a schematic left side view of the staircase. Figure 3 is the first
FIG. 4 is a cross-sectional view taken along the line A-A of the transition part from the straight line surrounded by the dashed-dotted line circle in the figure to the curved part, and FIG. 4 is a B--
5 is a sectional view taken along the line C-C of the transition portion from one curved section to the other curved section surrounded by the dot-dashed line circle in FIG. 1; and FIG. It is a sectional view taken along the line DD of a straight line portion surrounded by a chain line circle. FIG. 7 is a plan view of the stair unit for switching from the straight part of the stairs to the curved part, FIG. 8 is a rear view of the stair unit, and FIG. 9 is a left side view of the stair unit. , FIG. 10 is a sectional view taken along the line E--E in FIG. 7. FIG. 11 is a plan view of the stair unit for the curved part of the stairs, FIG. 12 is a rear view of the stair unit, FIG. 13 is a left side view of the stair unit, and FIG. 11
It is a sectional view taken along the line FF in the figure. FIG. 15 is a plan view of the stair unit for switching from the curved part of the stairs to the straight part, FIG. 16 is a rear view of the stair unit, and FIG. 17 is a left side view of the stair unit. , FIG. 18 is a sectional view taken along the line GG in FIG. 15. FIG. 19 is a plan view of the stair unit for the straight section of the stairs, FIG. 20 is a rear view of the stair unit, FIG. 21 is a left side view of the stair unit, and FIG. 20 is a sectional view taken along line H-H in FIG. 19. FIG. 23 is a schematic left side view of a prefabricated staircase in an assembled state according to another embodiment of the present invention, and FIG. 24 is a plan view of a stair unit for switching from a curved section to a straight section of the staircase. 25 is a rear view of the staircase unit, and FIG. 26 is a rear view of the stair unit.
The figure is a left side view of the stair unit, and FIG. 27 is a sectional view taken along the line I--I in FIG. 24. FIG. 28 is a plan view of the staircase unit for the curved part of the staircase;
FIG. 29 is a rear view of the stair unit, and the third
Figure 0 is a left side view of the stairway unit.
The figure is a sectional view taken along the line J-J in FIG. 28. Fig. 32 is a plan view of a stair unit for switching from a straight section to a curved section of the stair, Fig. 33 is a rear view of the stair unit, and Fig. 34 is a left side view of the stair unit. , Figure 35 is K-K in Figure 32.
FIG. 1...Horizontal board, 2...Upward joint body, 3...
Downward joint body, 4... Long hole, 5... Nut part, 6
...Bolt, 7...Stair unit for straight section, 8...
...Upward joint body, 9...Downward joint body, 10...
Fixing bolt, 11... Horizontal seat plate, 12... Upper nut body, 13... Lower nut body, 14... Stair unit for curved section, 15... Stair unit for switching,
16...Switching staircase unit, 17...Top staircase unit, 18...Base staircase unit,
19...Treadboard.

Claims (1)

[Claims] 1. A prismatic cylindrical upward joint body 2 and a prismatic cylindrical downward joint body 3 are vertically protruded from the base end and the distal end of the horizontal substrate 1, and a longitudinal long hole 4 is provided in the upward joint body 2,
A nut part 5 is fixed to the downward joint body 3, and the upper and lower upward joint bodies 2 and the downward joint body 3, which are non-rotatably fitted to each other, are tightened by bolts 6 screwed into the nut part 5 from the elongated hole 4. Straight section stair unit 7 to be fixed; cylindrical upward joint body 8 and cylindrical downward joint body 9 to the base end and distal end of horizontal board 1;
A fixing bolt 10 is vertically protruded from the center of the upper end of the upward joint body 8, and a downward joint body 9 is vertically protruded.
A horizontal seat plate 11 is fixedly installed inside, and an upward joint body 8 and a downward joint body 9 of the upper and lower stages are rotatably fitted to each other.
A staircase unit 14 for a curved portion is tightened and fixed by sandwiching a horizontal seat plate 11 between an upper nut body 12 and a lower nut body 13 screwed together with a fixing bolt 10; A rectangular cylindrical upward joint body 2 and a cylindrical downward joint body 9 are provided vertically protruding from the top end thereof, and a longitudinal long hole 4 is provided in the upward joint body 2.
A horizontal seat plate 11 is fixed in the downward joint body 9, and the upward joint body 2 is non-rotatably fitted to the downward joint body 3 of the stair unit 7, and is screwed into the nut part 5 through the long hole 4. The downward joint body 9 is rotatably fitted to the upward joint body 8 of the stair unit 14, while being tightened and fixed by the double bolt 6.
A staircase unit 15 for switching from a curved section to a straight section, which is tightened and fixed by sandwiching a horizontal seat plate 11 between an upper nut body 12 and a lower nut body 13 screwed together with a fixing bolt 10; Board 1
A cylindrical upward joint body 8 and a rectangular cylindrical downward joint body 3 are vertically protruded from the base end and the distal end thereof, and a fixing bolt 10 is vertically protruded from the center of the upper end of the upward joint body 8, A nut portion 5 is fixed to the downward joint body 3, an upward joint body 8 is rotatably fitted to the downward joint body 9 of the stair unit 14, and an upper nut body 12 and a lower nut body are screwed to the fixing bolt 10. By sandwiching the horizontal seat plate 11 between the stairway units 13, the horizontal seat plate 11 is tightened and fixed, while the downward joint body 3 is non-rotatably fitted to the upward joint body 2 of the stair unit 7,
A step unit 16 for switching from a straight line to a curved line is tightened and fixed by a bolt 6 screwed into a nut 5 from a long hole 4; is vertically protruding, and a nut part 5 is fixed to the downward joint body 3, and the downward joint body 3, which is non-rotatably fitted to the upward joint body 2 of the stage unit 7, is screwed into the nut part 5 from the elongated hole 4. A top stage unit 17 has a horizontal base plate 1 fixed to the floor structure on the upper floor while being tightened and fixed by screws 6 inserted into the top; A vertical through hole 4 is provided in the upward joint body 2, and the upward joint body 2, which is non-rotatably fitted to the downward joint body 3 of the stair unit 7, is screwed into the nut portion 5 through the through hole 4 with a bolt 6. The base stair unit 18 is tightened and fixed by the horizontal board 1, while the horizontal board 1 is fixed to the floor structure of the lower floor.
A prefabricated staircase consisting of; and a tread 19 fixed to the upper surface side of the horizontal base plate 1 of each staircase unit.