JPH054512B2 - - Google Patents

Description

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

[Prior Art] In the conventional prefabricated staircase disclosed in Japanese Patent Publication No. 62-13460, an upward joint body and a cylindrical downward joint body are vertically protruded from the base end and the distal end of a horizontal base plate, respectively. A stair unit has a support bolt fixed vertically at the center of the upper end of the upward joint body, a horizontal seat plate fixed inside the downward joint body, and a shaft hole into which the support bolt is inserted in the center of the horizontal seat plate. I am using it.

The upward joint body and the downward joint body of the upper and lower stair units, which are rotatably fitted to each other, can be held in a predetermined position by sandwiching a horizontal seat plate between the upper nut body and the lower nut body screwed to the support bolt. is fixed to.

However, in this prefabricated staircase, the support bolts are placed on the vertical axis of the upward joint body, so if the upper and lower nut bodies become loose for some reason, the upward joint body and the downward joint body can rotate relative to each other. Therefore, there is a risk that the assembled state of the upper and lower stair units may be distorted and the stairs may swing.

[Problems to be Solved by the Invention] Accordingly, an object of the present invention is to provide a method for manufacturing straight stairs of various heights and arrangement modes by making the assembly work easier and by adjusting the arrangement angle and height interval between the upper and lower stair units. To provide a prefabricated staircase in which a spiral staircase can be easily constructed, and the assembly between the upper and lower stair units is stable and firm, so that the assembled state does not become distorted or the stairs swing during use. That's true.

[Means for Solving the Problems] As explained below using reference numerals in the attached drawings, in the prefabricated staircase of the present invention, the stair unit 7 having a plurality of upper and lower steps has an upward joint at the base end of the horizontal base plate 1. A downward joint body 3 into which the upward joint body 2 of the lower unit is rotatably and vertically movable is vertically protruded from the tip of the horizontal substrate 1, and the upward joint body 2 A radial screw hole 4 is provided at the upper end of the side wall of the downward joint body 3, and a radial screw hole 5 is provided at the lower end of the side wall of the downward joint body 3.

Screw holes 4 in the upward joint body 2 of the lower unit
A lock bolt 11 is screwed into the upper unit, and the tip of the lock bolt 11 is attached to the downward joint body 3 of the upper unit.
is fastened to the inner wall surface of the In addition, a lock bolt 1 is installed in the screw hole 5 of the downward joint body 3 of the upper unit.
2 are screwed together, and the tip of the lock bolt 12 is tightened to the outer wall surface of the upward joint body 2 of the lower unit.

A support bolt 6 is fixed vertically to the center of the upper end of the upward joint body 2 of the stair unit 7, and the downward joint body 3
A shaft hole 9 into which the support bolt 6 is inserted is provided in the center of the horizontal seat plate 8 fixed to the horizontal seat plate 8, and an adjustment nut 10 is screwed into the support bolt 6 of the lower unit that protrudes upward from the horizontal seat plate 8. match.

[Function] As shown in Fig. 1, the top stair unit 13 is connected to the upper end of the stair structure constructed by sequentially connecting a plurality of step units 7, 7..., and the base stair unit 13 is connected to the lower end of the stair structure. A stairway unit 14 is connected. The top stair unit 13 is made by removing the upward joint body 1 from the standard stair unit 7.
A mounting plate 14 is fixed to the base end of the horizontal board 1, and the mounting plate 15 is fastened and fixed to the floor structure 17 on the upper floor with screws 16. The base stair unit 14 is a standard stair unit 7 with the downward joint body 3 removed, and the horizontal board 1 is fastened and fixed to the floor structure 19 on the lower floor by screws 18.

When assembling and lowering this prefabricated staircase from the upper floor side to the lower floor side, the upward joint body 2 of the lower unit is fitted into the downward joint body 3 of the upper unit from the lower opening, and the support bolts 6 The height between the upper and lower stair units can be set as designed by bringing the adjustment nut 10 screwed into contact with the upper surface of the horizontal seat plate 8, and turning the adjustment nut 10 to move the lower unit up and down. Adjust to Further, by rotating the lower unit 7 in a horizontal plane about the support bolt 6, the arrangement angle between the upper and lower stair units is adjusted.

After completing this height adjustment and angle adjustment, press the tip of the lock bolt 11 screwed into the screw hole 4 of the upward joint body 2 of the lower unit against the inner wall surface portion 3a of the downward joint body 3 of the upper unit. Then, the tip of the lock bolt 11 screwed into the screw hole 5 of the downward joint body 3 of the upper unit is pressed against the inner wall surface 2a of the upward joint body 2 of the lower unit, and each lock bolt 11, 12 is strongly tightened. Therefore, the upper and lower stair units are fixed at a predetermined angle.

Thereafter, by sequentially repeating this operation, the stairs are assembled from the upper floor side to the lower floor side. Top stair unit 13 and base stair unit 14
The assembly between the stair unit 7 and the standard staircase unit 7 is carried out in the same manner as described above.

Note that this prefabricated staircase can also be assembled from the lower floor side to the upper floor side.

[Embodiment] In the illustrated embodiment, the upward joint body 2 and the downward joint body 9 are constructed of metal cylindrical bodies and are welded to the horizontal substrate 1. Four screw holes 4 and four screw holes 5 are provided at 90 degree intervals. In the embodiment shown in FIG. 7, the inner wall surface portion 3a of the downward joint body 3, which the lock bolt 11 comes into contact with, is formed into a tapered surface whose radius decreases upwardly. Further, the outer wall surface portion 2a of the upward joint body 2, which the lock bolt 12 comes into contact with, is formed into a tapered surface whose radius increases downwardly.

The horizontal seat plate 8 has a pair of mounting plate parts 2 on the circular main part.
It has a protruding 0. The horizontal seat plate 8 is fitted into the upper opening of the downward joint body 1 of the upper staircase unit, and its circular main portion is fitted into the upper end of the upward joint body 2 of the lower staircase unit 7. The horizontal seat plate 8 is connected to the horizontal base plate 1 through the through hole 21 of the mounting plate part 20.
It is fixed to the downward joint body 3 by screwing the screw 23 into the screw hole 22 .

Incidentally, the horizontal seat plate 8 can also be directly welded and fixed to the inner wall surface of the downward joint body 3. When the horizontal seat plate 8 is fixed to the downward joint body 3 before tightening the lock bolt 11, the screw hole 4
It is necessary to determine the shape and fixing position of the horizontal seat plate 8 so that the screwing operation of the lock bolt 11 into the horizontal seat plate 8 is not obstructed. When the horizontal seat plate 8 is fixed to the downward joint body 3 after the lock bolt 11 is tightened, the horizontal seat plate 8 can be formed into a pot-shaped cylindrical body as shown in FIG.

The lock bolt 11 is screwed into the screw hole 4 from the inside of the receiving joint body 2, and the lock bolt 12 is screwed into the screw hole 5 from the outside of the downward joint body 3. The part has a hexagonal hole into which a wrench for rotational operation is inserted. The support bolt 6 is fixed to the upward joint body 2 by welding to the horizontal fixing plate 40 welded to the inner wall surface of the upward joint body 2, and the bolt shaft portion is inserted into the central through hole 41 of the horizontal fixing plate 40. has been done.

The upward joint body 2 and the downward joint body 3 of the horizontal 1 are welded to the horizontal base plate 1 together with an appropriate reinforcing plate to form the skeletal structure of the staircase unit. To improve this, a cosmetic cover body 24 made of plastic molding is fitted. The cover body 24 is fixed to the horizontal base plate 1 by tapping screws screwed into the receiving holes 25 on the outer peripheral edge of the horizontal base plate 1 before assembling the stairs.

In addition to the adjustment nut 10, a movable horizontal plate 26 can be screwed onto the support bolt 6 through a screw hole 27 in the center. When assembling a prefabricated staircase from the lower floor to the upper floor, the movable horizontal plate 26 of the lower unit is moved to the required height along the support bolts 6 in advance, and the downward joint body of the upper unit is moved to the required height. By placing the horizontal seat plate 8 fixedly attached to the movable horizontal plate 26 on the movable horizontal plate 26, the assembly work can be performed efficiently.

In addition, the downward joint body 3 and the upward joint body 2 of the upper and lower stages
When it is desired to adjust the vertical position of the movable horizontal plate 26 after the two have been fitted, in the embodiment shown in FIG. Then, rotate the movable horizontal plate 26. In the embodiment shown in FIG. 7, an arcuate slot 29 concentric with the shaft hole 9 is provided in the horizontal seat plate 8 made up of the bottom wall of a pot-shaped cylindrical body. into the through hole 28 of. It is also possible to insert a washer with teeth on one side or a washer with teeth on one side 30 between the horizontal seat plate 8 and the adjustment nut 10 or between the movable horizontal plate 26 and the horizontal seat plate 8.

The step board 31 is fixed to the upper surface of the horizontal board 1 by screwing screws 39 into screw holes 32 formed in the outer edge of the horizontal board 1. In order to accurately set the footboard 31 in a horizontal position, a level adjustment plate 33 can be inserted between the footboard 31 and the horizontal base plate 1.

The level adjustment plate 33 has four screws 34 screwed into nuts welded to the lower surface of the outer peripheral edge, and is loosely fitted into the upward joint body 2 through a circular hole 35 at the base end. By increasing or decreasing the screwing depth of the screws 34, the level adjustment plate 33 is set to a horizontal state, and the tread plate 31 that abuts the upper surface of the level adjustment plate 33 is also set to a horizontal state.

Cover tube 3 fitted on the outside of the downward joint body 3
6 is provided at its lower end with a skirt portion 37 having a radius that covers the circular hole 35 of the level adjustment plate 33. When tightening the lock bolt 12, the cover cylinder 36 is inserted into the inner peripheral recess 38 of the cover body 24.
He is retreating to the side. After the lock bolt 12 is tightened, the cover cylinder 36 moves along the downward joint body 2, and the skirt portion 37 comes into contact with the upper surface of the level adjustment plate 33, concealing the connecting portion including the head of the lock bolt 12. The connection structure between the upper and lower stair units 7, 7 cannot be detected from the outside, and the appearance is also improved.

Note that the shapes of the upward joint body 2, the downward joint body 3, the horizontal seat plate 8, etc., the number of lock bolts 11, 12 used, etc. are not limited to those shown in the drawings, and can be changed in various ways.

[Effects of the Invention] As described above, according to the present invention, after the cylindrical upward joint body 2 of the lower stage unit is fitted into the cylindrical downward joint body 3 of the upper stage unit. By moving or rotating one of the upper and lower units relative to the other, you can easily create straight staircases and spiral staircases of various heights and configurations, combined straight and spiral staircases, and stairs with landings. However, in the present invention, after adjusting the height and arrangement angle between the upper and lower stair units, the lock bolt 1 is screwed into the screw hole 4 of the upward joint body 2 of the lower stair unit.
1 is tightened to the inner wall surface of the downward joint body 3 of the upper unit, while the lock bolt 12 is screwed into the screw hole 5 of the downward joint body 3 of the upper unit.
Since the tip of the stair unit 7 is tightened to the outer wall surface of the upward joint body 2 of the lower unit, the connection between the upper and lower stair units 7, 7 is firmly established, and distortion and rocking may occur due to the load during use. It is possible to accurately construct stairs without any problems.

In addition, in this prefabricated staircase, a support bolt 6 is fixed vertically at the center of the upper end of the upward joint body 2, a horizontal seat plate 8 is fixed to the downward joint body 3, and the horizontal seat plate 8 is fixed at the center of the horizontal seat plate 8. Since the adjusting nut 10 is screwed onto the support bolt 6 that protrudes upward from the shaft hole 9 of the When assembling and lowering from the side, it is possible to prevent the lower stair unit 7 from falling off from the upper stair unit 7, making the assembly work easier.

In the prefabricated staircase according to claim 2, the inner wall surface portion 3 of the downward joint body 3 that the lock bolt 11 abuts
a is formed into a tapered surface whose radius decreases as it goes upward, while the outer wall surface portion 2a of the upward joint body 2 that the lock bolt 12 comes into contact with is formed into a tapered surface whose radius increases as it goes downward. There is no slippage between the downward joint body 3 and there is no slippage between the lock bolt 12 and the upward joint body 2, and the more the load is applied to the stair unit 7, the more the tip of the lock bolt 11 points downward. In order to more strongly engage the inner wall surface portion 3a of the joint body 3 and the outer wall surface portion 2a of the upward joint body 2, the upper and lower stair units 7, 7 can maintain their mutual height positions and arrangement angles more firmly. become.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing an assembled state of a prefabricated staircase according to an embodiment of the present invention. FIG. 2 is a front view of the stair unit constituting the stairway,
FIG. 3 is a plan view of the stair unit, and FIG. 4 is a sectional view taken along the line A--A in FIG. 3. FIG. 5 is a longitudinal cross-sectional view showing the connection structure of the stair unit, and FIG. 6 is a plan view showing an example of the arrangement of the stair unit. FIG. 7 is a longitudinal sectional view showing a connecting structure of a stair unit according to another embodiment of the present invention. 1...Horizontal board, 2...Upward joint body, 3...
Downward joint body, 4...screw hole, 5...screw hole, 6
... Support bolt, 7 ... Stair unit, 8 ... Horizontal seat plate, 9 ... Shaft hole, 10 ... Adjustment nut, 11
...Rockvolt, 12...Rockvolt, 13
...Staircase unit for top, 14...Stairway unit for base, 15...Mounting plate, 16...Mounting screw, 17...Upper floor structure, 18...Mounting screw, 19...Lower floor floor structure, 20...upper mounting plate part, 21...through hole, 22...screw hole, 23...fixing screw, 24...cover body, 25...receiving hole, 2
6...Movable horizontal plate, 27...Screw hole, 28...Through hole, 29...Slot, 30...Washer, 31...
...Treadboard, 32...Screw hole, 33...Level adjustment plate, 34...Adjustment screw, 35...Circular hole, 36
... Cover tube, 37 ... Skirt portion, 38 ... Inner peripheral recess, 39 ... Fixing screw, 40 ... Horizontal fixing plate, 41 ... Center through hole.

Claims (1)

[Scope of Claims] 1. A cylindrical upward joint body 2 is provided vertically protruding from the base end of the horizontal substrate 1, and the upward joint body 2 of the lower unit is fitted into the cylindrical shape so as to be rotatable and movable up and down. A downward joint body 3 is vertically protruded from the tip of the horizontal board 1, a radial screw hole 4 is provided at the upper end of the side wall of the upward joint body 2, and a radial screw hole 4 is provided at the lower end of the side wall of the downward joint body 3. A plurality of upper and lower stage units 7 provided with holes 5; a lock bolt 11 that is screwed into the screw hole 4 of the upward joint body 2 of the lower stage unit and whose tip is tightened to the inner wall surface of the downward joint body 3 of the upper stage unit; and a lock bolt 12 which is screwed into the screw hole 5 of the downward joint body 3 of the upper unit and whose tip is tightened to the outer wall surface of the upward joint body 2 of the lower unit; and the upper end of the upward joint body 2 of the stair unit 7. Support bolt 6 fixed vertically in the center
A horizontal seat plate 8 which is fixed to the downward joint body 3 and has a shaft hole 9 in the center into which the support bolt 6 is inserted; and a support bolt of the lower unit that projects upward from the horizontal seat plate 8. Adjustment nut 1 screwed into 6
A prefabricated staircase with 0. 2 Downward joint body 3 that the lock bolt 11 comes into contact with
The inner wall surface portion 3a of the upwardly facing joint body 2 is formed into a tapered surface whose radius decreases as it goes upward, and the outer wall surface portion 2a of the upward joint body 2 which the lock bolt 12 comes into contact with is formed as a tapered surface whose radius increases downwardly. 1
The prefabricated stairs described in .