JP2000034814A - Device and method for adjusting level of treadboard of stair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device to adjust a treadboard which can reduce manhours and a construction period by facilitating adjustment of the horizontal level of the treadboard made of wood mounted onto the tread surface of a substrate of a steel stair by means of screws. SOLUTION: The device makes it possible to adjust the level of a treadboard 1 by a method wherein a nut 3 is buried at each of the corners of the rear side of the treadboard of wood 1 which is screw-threadedly mounted to the tread surface of a substrate 2 of a steel stair and the height of a bolt screwed into each of the nuts 3 can be adjusted. And a through hole is formed near each of the corners of the tread surface of the substrate 2 and each nut 3 is secured to the rear side of the tread surface at the through hole. And the height of the forward end of a bolt 4, which is screwed into the nut 3 so as to protrude on the tread surface, is adjusted to adjust the level of the treadboard 1, which is screw-threadedly mounted onto the surface of the substrate 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for adjusting a horizontal level of a wooden stair tread screwed onto a tread surface of an iron stair foundation of an indoor stair such as a steel frame house (further, a tread and a stair foundation). .

[0002]

2. Description of the Related Art Conventionally, when an indoor staircase is installed in a steel house or the like, for example, as shown in FIGS. 4 and 5, an iron plate is bent stepwise between floor beams on upper and lower floors. Stair base 2 is fixed. Then, a wooden tread plate 10 is fixed to the upper surface of the stair base 2 with screws 5 from the back surface.
In order to adjust the level of 0 horizontally, a wooden liner 11 is sandwiched on both sides between the upper surface of the stair base 2 and the wooden tread plate 10.

[0003]

However, since the accuracy of the horizontal level of the staircase base 2 made of iron plate is not constant, it takes skill to cut the thickness of the liner and the inclined surface for each step, and the tread plate 10 is required. There was a problem that it took a lot of time and effort to install the device, and the construction period was also long.

Accordingly, the present invention provides an apparatus for adjusting the horizontal level of a tread plate, which can easily adjust the horizontal level of a wooden stair tread plate screwed onto the tread surface of an iron stair base, thereby reducing the number of steps and the construction period. To provide.

[0005]

According to the present invention, firstly, nuts are embedded at four corners on the back surface of a wooden tread plate screwed to a tread surface of an iron staircase base, and bolts screwed to each nut are provided. The level of the footboard can be adjusted by adjusting the height of the head.

[0006] Also, the present invention, secondly, through holes are drilled near the four corners of the tread surface of the iron staircase base, a nut is fixed at the through hole position on the back surface of the tread surface, and screwed to this nut. ,
By adjusting the height of the tip of each bolt whose tip projects on the tread surface, the level of the wooden tread plate screwed onto the tread surface of the base of the stairs can be adjusted.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an apparatus for adjusting a horizontal level of a tread according to an embodiment of the present invention.

[0008]

(Embodiment 1) FIG. 1 (a) is a front vertical sectional view showing a level adjusting device of Embodiment 1, and FIG.
FIG. 2 is a bottom view of a tread plate of the level adjustment device, and FIG. 2 is a side sectional view of the level adjustment device.

In FIG. 1 and FIG. 2, the step board 1 is made of plywood having a thickness of, for example, 36 mm, a width of 350 mm, and a length of 850 mm, and is provided with holes 1a at four corners on the rear surface.
In each of the holes 1a, for example, an onyme nut 3 having an inner diameter of 8 mm and having a spike-like projection on an outer peripheral portion is driven and buried.

The onion nut 3 has a total length of 2 mm.
A 0 mm bolt 4 is screwed. When the tread plate 1 is mounted on the tread surface of the iron plate stair base 2, the riser plate 8 and the tread plate 1 are temporarily placed, and each bolt 4 is rotated forward and reverse so that the upper surface of the tread plate 1 is horizontal. What is necessary is just to adjust the head height. When the head of the bolt 4 is covered with a rubber cap 4a or the like, the tread plate 1 is hardly displaced, so that the work can be performed more smoothly. When the level adjustment of the step board 1 is completed in this way, the step board 1 is fixed with the screw 5 from the back surface of the stair base 2.

(Embodiment 2) FIG. 3 is a longitudinal sectional view of a side portion of a level adjusting device according to Embodiment 2. In FIG. 3, through holes 2a are perforated near the four corners of the iron plate staircase base 2,
A nut 6 having an inner diameter of 8 mm is fixed to the back surface.
The nut 6 has a length of 2
A 5 mm bolt 7 is screwed, and its tip protrudes from the upper surface of the staircase base 2.

A wooden tread 1 is provided on the tread surface of the base 2 of the stairs.
When mounting, as in the first embodiment, the riser plate 8 and the tread plate 1 are temporarily placed, and the bolts 7 are rotated in the forward and reverse directions so that the upper surface of the tread plate 1 is horizontal. What is necessary is just to adjust individually. If the recess 1a into which the tip of the bolt 7 fits loosely is provided on the back surface of the tread plate 1, the tread plate is hardly displaced, so that the work can be performed more smoothly.

After the level adjustment of the step board 1 is completed in this way, the step board 1 is fixed from the back surface of the stair base 2 with the screw 5. In addition, the height of the above-mentioned tread plate, the size and mounting position of the adjustment bolt, and the material and shape of the upper surface of the tread plate may be appropriately selected as necessary.

[0014]

As described in detail above, the present invention provides
First, since the height of each bolt head screwed to the nut embedded in the four corners of the back surface of the wooden tread plate can be individually adjusted, the level of the tread plate can be easily adjusted in a short time without skill. Can be adjusted.

Second, the present invention requires that the height of the tip of each bolt screwed with a nut fixed to the vicinity of the four corners of the tread surface of the iron staircase be individually adjusted, so that skill is required. Therefore, the level of the tread can be easily adjusted in a short time.

In the case of the former device, if the bolt head is covered with a rubber cap or the like, the bolt head is less likely to be displaced, so that the work can be performed more smoothly. In the case of the latter device, the back surface of the tread plate can be used. By providing a recess into which the tip of the bolt is loosely fitted, the footboard is less likely to be displaced, so that the work can be performed more smoothly.

[Brief description of the drawings]

FIG. 1 is a diagram showing a level adjusting device according to a first embodiment. FIG. 1A is a front vertical sectional view of the level adjusting device according to the first embodiment, and FIG. It is a bottom view of the step board of a level adjustment apparatus.

FIG. 2 is a side sectional view of the level adjustment device.

FIG. 3 is a vertical cross-sectional view of a side portion of a level adjustment device according to a second embodiment.

FIG. 4 is a side longitudinal sectional view for explaining a situation in which a tread plate is attached to a stair base of a conventional example.

FIG. 5 is a front vertical sectional view for explaining a situation in which a tread plate is attached to a base of a conventional staircase.

[Explanation of symbols]

 1,10 tread plate 2 stair base 3,6 nut 4,7 bolt 5 screw 8 riser 11 liner

Claims (7)

[Claims] 1. A wooden tread plate screwed to a tread surface of a base of an iron staircase has nuts buried in four corners on a back surface thereof. The height of a bolt head screwed to each nut is adjusted to adjust the tread plate. Level adjusting device for stair treads, wherein the level is adjusted. 2. A through hole is drilled in the vicinity of the four corners of the tread surface of the iron stair base, and a nut is fixed at the through hole position on the back surface of the tread plate, and is screwed to the nut, and the tip portion is screwed. The level of the stair tread plate, wherein the level of the wooden tread plate screwed onto the tread surface of the stair base can be adjusted by adjusting the height of the tip of each bolt projecting on the tread surface. Adjustment device. 3. A tread plate having a plurality of nuts embedded at appropriate positions on a back surface thereof and bolts screwed to each of the nuts, wherein the bolt head is placed on an upper surface of a stair base, so that a staircase is provided. A tread plate supported by a base and held at a horizontal level by adjusting the height of each of said bolts. 4. A stair base having a plurality of nuts fixed in place on the tread surface and bolts screwed to each of the nuts, the tip of each bolt supporting the tread plate. A staircase base, characterized in that the step plate is held at a horizontal level by adjusting the height of the tip of each bolt. 5. The staircase base according to claim 4, wherein the step plate held on the staircase base is provided with a recess for receiving a tip portion of each bolt. 6. A plurality of nuts are buried in appropriate places on the back surface of the tread plate, bolts are screwed into each of the nuts, and the tread plate with the bolts screwed to the nuts is placed on the tread surface of the base of the stairs. A horizontal level adjusting method for a tread plate, wherein the tread plate is held horizontally by adjusting the height of the portion. 7. A plurality of nuts are fixed in place on the base of the stairs, bolts are screwed to each of the nuts, and the tread is placed so that the tip of each of the screwed bolts supports the tread. A horizontal level of the tread plate, wherein the tread plate is held horizontally by adjusting the height of the tip of the tread plate.