JPH11117480A - Height adjusting method and height adjusting jig for steel frame stair and bearing beam for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate finished height adjustment of steel frame stairs, to achieve efficiency of construction work, to eliminate need of openings in the steel frame stairs for height adjustment work, to eliminate need of closing the openings, and to facilitate surface finishing construction. SOLUTION: A nut 11 having a bolt 12 is fixed to a support plate 10 to form a height adjusting jig 15. The support plate 10 of the height adjusting jig 15 is fixed to outer surfaces 5a, 6a (on the other side of step plate connection surfaces) of open strings 5, 6 of steel frame stairs 17 (17a, b). The steel frame stairs 17 are installed on a bearing beam on a body. The height adjusting jig 15 is disposed (b) in a gap 23 between the steel frame stairs 17. The bolt 12 is rotated, and a tip 14 is pressed to an upper surface 21 of the bearing beam 19 to elevate the steel frame stairs 17 to be held at a specified height position. The bearing beam 19 is welded with open strings 5, 6 to be fixed through an additive plate 26, so installation of the steel frame stairs 17 is completed. The gap 23 is closed with a closing plate 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a jig for adjusting the height of a steel staircase and its support beam when fixing the steel staircase to a support beam of a skeleton.

[0002]

2. Description of the Related Art Conventionally, the attachment of a steel frame stair to a skeleton is performed by:
Steel stairs 41, 4 are provided on the upper surfaces of the steel receiving beams 40, 40a.
1 are placed on the upper and lower ends 42 and 42a, respectively, and
A thin plate is sandwiched between the support and the receiving beam 40a to adjust the height.

In another method, a height adjusting jig 45 is fixed to the inner side surface 44 of the slab beams 43 of the steel frame stairs 41 (FIG. 6A). The height adjusting jig 45 attaches a bolt 49 to the screw hole of one piece 47 of the angle
Is screwed downward, and the angle material 46 is
The other piece 48 is fixed to the steel stairs so that
(FIG. 6B). Then, the bolt 49 is rotated, and the height is adjusted by the amount of protrusion of the tip 50 of the bolt 49.

[0004] When the installation height of the steel frame stairs 41 is determined by any of the methods, the steel frame stairs 41 and the receiving beam 40 are welded via the attachment plate 51.

[0005]

In the above prior art,
The former method has problems that it takes time to adjust the position, and heavy machinery and human labor are required to lift the steel frame stairs 41.

In the latter case, bolting openings 53, 53 are required at the end 52a of the landing (or tread portion) 52 to be attached to the receiving beam 40.
After welding, it takes time to close the openings 53 and 53 with the plate material 54, and there is a problem that a step occurs after the step 53 is closed and the step becomes a hindrance when a finishing material is applied (FIG. 7). Also, when the steel stairs 41, 41 are used as temporary work stairs, there is also a trouble that the openings 53, 53 have to be temporarily closed.

[0007]

However, the present invention has solved the above-mentioned problem by providing a height adjusting jig on the outer surface of the slab girder.

[0008] That is, the present invention provides a method for mounting a stepped end of a steel frame, in which a tread is sandwiched between two slabs, and a frame.
A steel staircase provided with a height adjusting jig on an outer surface of a sasara girder, and changing a downwardly projecting amount of an adjusting bolt of the height adjusting jig to adjust a gap between a frame and a step end of the steel frame staircase. It is a method of adjusting the mounting height between the beam and the receiving beam.

Further, in the above-mentioned method, there is provided a method of adjusting a height of a steel stair and a receiving beam thereof, in which the height is adjusted, the frame and the steel stair are fixed, and then the height adjusting jig is removed from the steel stair. The height adjusting jig is a method of adjusting the mounting height between the steel staircase to be positioned in the gap between the adjacent girders of the steel stairs or the gap for installing the staircase, and the supporting beam.

[0010] Further, the present invention is characterized in that an adjusting portion having a vertical screw hole is connected to a supporting portion which can be removably fitted to a lower edge of a steel frame mounting portion of a sara beam, and a bolt is attached to the screw hole. Is screwed downward, and a lower edge of the bolt can protrude below a lower edge of the support portion. Further, in the above, in the height adjusting jig, wherein the supporting portion is formed in a substantially U-shaped cross section in which the height of one piece is higher than that of the other piece, and an adjusting portion formed of a nut is connected to the other piece. is there.

[0011] In the above, the contact surface of the stepping girder with the tread plate is defined as an inner surface, and the other surface is defined as an outer surface.

In the above, the mounting end of the girder means a girder (side plate) of the landing girder when the landing portion of the steel staircase in which the tread portion and the landing portion are integrally formed is installed on the receiving beam. In the case where there is no landing at the end of () and only the tread portion, it refers to the sasara girder at the end of the tread portion.

[0013]

By increasing or decreasing the downwardly projecting amount of the adjusting bolt of the height adjusting jig, it is possible to raise and lower the girder in the vicinity of the receiving beam, and to adjust the mounting height of the entire steel staircase.

Since the height adjusting jig is provided on the outer surface of the girder, it is not necessary to provide an opening for operating the height adjusting jig on the landing or the tread.

[0015]

Embodiment 1 An embodiment of the present invention will be described with reference to FIGS. This embodiment is an embodiment in which the height adjusting jig 15 is fixed to the sasara beams 5, 6.

The steps 1 and 1 arranged in a step-like manner and both ends 1a and 1a of the landing are fixed with slabs 5 and 6 to form a steel staircase 17 with a landing (FIG. 1 (a)).

Next, a nut 11 to which a bolt 12 is screwed is fixed to the support plate 10 to form a height adjusting jig 15 (FIGS. 1B, 2A and 2B). ).

The support plate 10 of the height adjusting jig 15 is fixed to the outer surfaces (other side of the tread plate connecting surface) 5a, 6a of the girders 5, 6 with the tip 14 of the bolt 12 facing downward. At this time, the head 13 of the bolt 12 is located near the upper part of the girders 5, 6, and the tip 14 of the bolt 12 is formed so as to project below the lower edges 7, 7 of the girders 5, 6. (FIGS. 2A and 2B).

As described above, the steel frame stairs 17, 17 having the height adjusting jigs 15, 15 fixed to the upper and lower beam mounting positions of the slab beams 5, 6 are erected on the steel frame receiving beam 19 of the frame. At this time, the lower landing 2 of the upper steel frame stair 17a is provided on one side 20 of one receiving beam 19,
The upper landing 3 on the lower side of the steel stairs 17b is erected, and the upper landing 3 and the lower landing 2 constitute a landing 4 (FIG. 1 (a)). Also, a predetermined gap (usually about 150 mm) 23 is provided between the upper landing 3 and the lower landing 2 between the girders 5 and 6 so as to attach a handrail to the girdering girder. The adjustment jigs 15 are arranged. At this time, the height adjusting jigs 15, 15
Although it depends on the size of the bolt 12, if the bolt is about M20, the outer surfaces 5a, 6a of the girders 5, 6 are 50 to 6 from the outer surface.
Since it fits in about 0 mm, it fits in the gap 23 sufficiently.
(FIG. 1 (b)).

Similarly, on the other side of the girders 5 and 6, the gaps (typically about 100 mm) 24 and 24 between the columns 22 and 22a and the girders 5 and 6 are formed in order to normally construct the wall of the staircase. The height adjusting jigs 15 and 15 are sufficiently accommodated in the gaps 24, respectively (FIG. 1A).

Subsequently, the bolt 12 is rotated to move the tip 14
The steel stairs 17 (Sasara girders 5, 6) are raised and lowered by pressing against the upper surface 21 of the receiving beam 19, and are held at a predetermined height position. At this time, since the head 13 of the bolt 12 is located on the upper part of the girder, the turning operation is easy.

Subsequently, when the positions are determined by all the height adjusting jigs 15, 15 of the steel stairs 17, 17, the attachment plates 26, 26 are applied to the outer surfaces 7a, 8a of the slabs 5, 6, and The lower end 26 a of the attachment plate 26 is brought into contact with the upper surface 21 of the beam 19. Next, the attachment plate 26 and the receiving beam 19, and the attachment plate 26 and the slabs 5, 6 are welded and fixed, and the steel frame stairs 17 are fixed to the receiving beam 19 (FIGS. 2A and 2B). Thus, the installation of the steel frame stairs 17 is completed.

Subsequently, a closing plate 27 is fixed to the gap 23 to cover the portion 23. The gap 23 is a conventional ordinary steel frame stair, and is always provided for mounting the stair. Further, the closing plate 27 is also provided with a gap 23 by a conventional ordinary steel staircase.
Is usually used to plug

Even if the steel frame stairs 17 are not provided with a finishing material, the gap 23 is closed up and down, so that the height adjusting jigs 15, 15 can also be provided from below the steel frame stairs 17.
Can not be seen. In addition, in the conventional example in which the height adjusting jig is provided on the inner surface of the girder, if the lower surface of the landing is not closed, the height adjusting jig can be seen, so that the appearance is deteriorated.

[0025]

Embodiment 2 Next, another embodiment of the present invention will be described with reference to FIGS. This embodiment is an embodiment in which the height adjusting jig is detachable from the slab girder.

A support portion 32 having a substantially U-shaped cross section and having a fitting portion 29 which can be fitted into the lower edges of the girders 5, 6 is formed such that one piece 30 is high and the other piece 31 is low. A nut (adjustment part) 33 to which a bolt 34 is screwed is fixed to one piece 30 of the support part 32 so that the tip of the bolt 34 faces downward. The tip 35 of the bolt 34 is
2 so that it can project below the lower edge 32a.

The height adjusting jig 36 is constructed as described above (FIGS. 3A, 3B and 3C).

As in the case of the first embodiment, the steps and the landings arranged in a stepwise manner are fixed at both ends by slabs 5 and 6 to form a steel frame step 38. Sasara girders 5, 6 of the steel frame stairs 38
A notch 7 is formed at the lower edge of the beam mounting position.

As in the first embodiment, first, the steel frame stairs 3
8 is erected on a predetermined receiving beam 19 (FIG. 4A). Subsequently, the support portion 32 of the height adjusting jig 36 is inserted into the lower edge 7 of the slabs 5, 6 so that the bolts 34 are located on the outer surfaces 5a, 6a of the slabs 5, 6 (FIG. 4). (B)). At this time, the other piece 31 of the height adjusting jig 36 (lower than the one piece 30)
Since the insertion is performed from the side to the sparsers 5 and 6, the insertion operation can be easily performed.

Subsequently, the bolt 34 of the height adjusting jig 36 is rotated to receive the tip 35 of the bolt 34 that moves up and down and receives the beam 19.
To raise and lower the slab beams 5 and 6 to hold the steel staircase 38 at a predetermined height (FIG. 4C). Subsequently, auxiliary plates 26, 26 are brought into contact between the outer surfaces 5a, 6a of the slab beams 5, 6 and the upper surface 21 of the receiving beam 19, and the auxiliary plates 2
6 is fixedly welded to the girders 5, 6 and the receiving beam 19 (FIGS. 4 (d), 5 (a), 5 (b) and 3).

Subsequently, at all positions, when the welding fixation of the attachment plate 19 to the slabs 5, 6 and the receiving beam 19 is completed, the bolt 34 is rotated to release the contact with the receiving beam 19. Then, the height adjusting jig 36 is detached from the slab beams 5, 6 (FIGS. 4D and 4E). Thus, the fixing of the steel frame stairs 38 and the receiving beam 19 is completed.

In this case, if the thickness of the slabs 5 and 6 is substantially the same, they can be used in common. Therefore, if a plurality of height adjusting jigs 36 having different support portions 32 are prepared (not shown). Since the steel stairs 38 need not be processed, the steel stairs 38 can be used for most steel stairs. Further, since the height adjusting jig 36 is collected, waste of resources can be omitted.

In the above embodiment, the support portion 32 has a section U
It was shaped like a letter, but it was fitted to the lower edge of
Any other shape can be used as long as it can support the girders (not shown).

[0034]

According to the present invention, the height is adjusted by providing a height adjusting jig provided on the outer surface of the slab girder, so that the height adjusting work can be facilitated, and the jig can be mounted on the landing of the steel stairs or the tread. Since the opening for operation is not required, and the closing work of the opening can be omitted, there is an effect of increasing the efficiency of the construction work of the steel frame stairs. In addition, since there is no need for an opening for operating the jig, there is no obstruction mark on the opening from below the steel stairs, which enhances the aesthetic appearance and a finishing material such as a P tile or a vinyl chloride sheet is directly attached to the steel stairs. However, since no steps or joints appear, there is an effect of expanding the range of choice of the finishing material.

In the case of a height adjusting jig in which a bolt is received by a nut, the jig can be made compact, and it can be used in a stairwell or in a space where the space between the outside girders and the wall of the staircase is narrow. Can also be used, which has the effect of further reducing material costs.

When the height adjusting jig is detachable, welding is unnecessary, so that the work of attaching the height adjusting jig to the steel frame stairs is simplified, and the height adjusting jig is reused. It is possible to reduce waste of resources.

[Brief description of the drawings]

FIG. 1 (a) is a plan view of an installation end portion of a steel staircase according to an embodiment of the present invention, in which a portion D is cut away, and FIG. 1 (b) is an enlarged plan view of a cut portion D in FIG. 1 (a). .

2A is a partially enlarged sectional view taken along line AA of FIG. 1, and FIG. 2B is an enlarged sectional view taken along line BB of FIG.

3 (a) is a plan view, FIG. 3 (b) is a front view, and FIG. 3 (c) is a side view of the adjustment jig according to the embodiment of the present invention.

FIGS. 4A to 4E show an embodiment using the adjusting jig of the present invention, in which a side view and a plan view are arranged on the left and right.

FIG. 5 is a view showing a state in which the adjusting jig of the present invention is attached.
(A) is a plan view, (b) is a front view, and (c) is a side view.

6A is a schematic longitudinal sectional view of a conventional example, and FIG.
FIG. 4 is an enlarged cross-sectional view taken along line CC of FIG.

FIG. 7 is a partially enlarged plan view of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Step board 2 Lower landing 3 Upper landing 4 Landing 5,6 Sasara girder 5a, 6a Outer surface of sasara girder 7 Lower edge of sasara girder 10 Support plate 11 Nut (adjustment part) 12 Bolt 14 Bolt tip 15 Height adjustment jig 17 Steel stairs 19 Receiving beam 21 Upper surface of receiving beam 23, 24 Gap 26 Attached plate 29 Fitting part (supporting part) 30 One piece (supporting part) 31 Other piece (supporting part) 32 Supporting part 33 Nut (adjusting part) 34 Bolt 35 Tip of bolt 36 Height adjustment jig 38 Steel frame stairs 40 Receiving beam (conventional example) 43 Sasara girder (conventional example) 44 Inner surface of sasara girder (conventional example) 45 Height adjusting jig (conventional example) 49 Bolt (conventional example) ) 51 Attached plate (conventional example) 53 Opening (conventional example)

Claims (5)

[Claims] A height adjusting jig is provided on an outer surface of a girders girder when mounting a stepped end of a steel frame having two treads sandwiched by a treadle and a frame, and an adjusting bolt of the height adjusting jig is provided. A method of adjusting a mounting height of a steel frame stair and its receiving beam, characterized by adjusting a distance between a frame and an end of a steel frame stair by changing a downward projection amount of the steel frame. 2. The method for adjusting the mounting height of a steel staircase and its receiving beam according to claim 1, wherein after adjusting the height, the frame and the steel staircase are fixed, and then the height adjustment jig is removed from the steel staircase. 3. The mounting height adjustment between the steel staircase and the receiving beam according to claim 1, wherein the height adjusting jig is located in a gap between the adjacent girders of the steel staircase or a gap for installing the staircase room. Method. 4. An adjusting part having a vertical screw hole is connected to a supporting part which can be removably inserted into the lower edge of the steel frame mounting part of the sasara girder, and the bolt is directed downward to the screw hole. A height adjusting jig, wherein a lower edge of the bolt is protrudable below a lower edge of the support portion. 5. The height according to claim 4, wherein the supporting portion is formed to have a substantially U-shaped cross section in which the height of one piece is higher than that of the other piece, and an adjusting portion comprising a nut is connected to the other piece. Adjustment jig.