JP2597938Y2 - Footboard for assembly stairs - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the improvement of treads to be assembled and used as internal and external steps (emergency steps) of various buildings.

[0002]

2. Description of the Related Art An assembling staircase comprising a precast concrete tread plate in a factory and a slab made of a metal plate as its skeleton is known.
As is evident from Japanese Patent No. 24747, concrete treads mixed with reinforcing steel fibers or vinylon fibers have already been proposed.

[0003] According to the concrete stepboard of the known invention, rusting and noise can be prevented, and a good stepping feel can be obtained. Since it is assembled and fixed, it can be said that there is an advantage that it is possible to easily replace the tread after the assembling as compared with assembling means using bolts penetrating over the entire width of the tread.

[0004]

However, although the concrete tread plate of the above-mentioned known invention is a molded product with a reinforcing fiber, only two rods and reinforcing bars are provided on the tread plate. Since it is only partially buried, cracks are still likely to occur, and it is difficult to maintain a durable strength against bending and pulling.

In particular, since only the left and right end portions of the rod and the reinforcing bar are engraved as female threaded tubes, the rod or the reinforcing bar with the female threaded tube is formed to the width of the intended stairs in forming the tread plate. It must be prepared and prepared in advance as a wide variety of products, otherwise it cannot be adapted to changes in width dimensions, and it must be said that mass production of treads is still inferior. Furthermore, it is impossible to use the above-mentioned rods and rebars as separators for the stepboard forming formwork.

[0006]

SUMMARY OF THE INVENTION The present invention is intended to improve such a problem, and for that purpose, as a step board for an assembling stair, a concrete sheet containing reinforcing fibers is provided between the left and right sides of a metal plate slab. Insert a pair of hexagon bolts into the left and right side surfaces of the tread plate from the bolt play holes that open in both tread plates by inserting and setting the tread plate. In the assembling stairs, a reinforcing steel mesh is buried almost all over the tread board forming the tread board, and a pair of parallel full screw bolts crossing the front end and the rear end of the tread board along the left-right direction. The main feature is that a hexagonal nut for receiving the hexagonal bolt is screwed and fastened to the left and right end portions of each of the all screw bolts by welding and integrating with the rebar mesh.

[0007]

According to the above construction of the present invention, a reinforcing steel mesh is buried almost all over the tread board forming the concrete tread board with the reinforcing fiber, and the tread board is provided on the reinforcing steel mesh along the left-right direction. Because a pair of front and rear full screw bolts that are traversed in parallel are welded and integrated, the full screw bolts can be stably inserted and set in the forming mold as a fixing support for the rebar mesh when forming the tread plate. It can be efficiently formed as a rigid tread.

The full screw bolt not only functions as a fixing support for the rebar mesh, but also has hexagon nuts attached to both left and right ends thereof to form a fastening support for the hexagon bolt. Despite the fact that the treadle assembled with the girder by the fastening of the above can perform efficiently the assembling work, it is in a remarkably stable and robust assembly state,
Although it receives an acting force such as bending or pulling during use as a staircase, it is possible to maintain excellent durability strength against it.

Furthermore, all the threaded bolts has a threaded throughout its literally a transverse state along the lateral direction of the step board
By cutting the stairs to an appropriate length, it is possible to cope with the changing width of the stairs, and in that sense, the mass production effect of the treads can be expected to the maximum.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a basic embodiment of an assembling staircase (S) according to the present invention; FIG. ) Is made of glass fiber, carbon fiber, steel fiber, or other reinforced concrete containing various fibers, and is formed into a substantially L-shape in a side view.

That is, (11) is a flat tread board having a fixed length (L) (for example, about 315 mm), a thickness (T) (also about 45 mm) and a width (W) (also about 900 mm). The front end of the horizontal upper surface is provided with a plurality of anti-slip irregularities (12). (13) is a riser that rises continuously from the rear end of the tread (11), and has a constant height (H) (for example, about 80 mm) and a thickness (X) (also about 25 mm). Have.

In this case, in FIG. 1 to FIG. 6, the riser plate (13) is suspended from the horizontal upper surface of the tread plate (11) at a substantially right angle (α), but FIG. 7 corresponding to FIG. First
As shown in the modified embodiment, the front surface of the riser surface plate (13) may be raised from the tread surface plate (11) in a relationship state where the front surface of the riser surface plate (13) intersects the upper surface of the tread surface plate (11) at an obtuse angle (β).

[0013] Then, when the treads (S) are laid out in accordance with the height and the inclination angle of the intended assembly stairs, the adjacent interval pitch or overlap between the pair of adjacent front and rear stairs is adjusted from the right angle. Can be adjusted within the allowable range of a fixed length (P) given by the receding angle.

(M) is a reinforcing bar mesh embedded and integrated in a horizontal installation state, preferably at a position slightly deviated downward from the tread board (11), and the vertical bars (14) welded to each other. And a horizontal streak (15) and occupy almost the entire tread board (11). Therefore, coupled with the fact that it contains the above-mentioned reinforcing fiber,
It is possible to obtain more excellent durability against cracking, pulling, bending and the like of the tread board (11).

[0015] (16) is located at the front end and the rear end of the tread board (11), and from below to the longitudinal streak (14) of the reinforcing bar mesh (M), from below the longitudinal streak (14). Interlacing
A pair of parallel full screw bolts, which are welded together in a state, all of which are horizontal along the left-right direction of the tread board (11).
Is traversing . That is, the full screw bolt (16) is welded and integrated with the reinforcing steel mesh (M) to form a fixing support and a torsion bar for the reinforcing steel mesh (M) when the tread plate (S) is formed, and will be described later. It also functions as a fastening support for the girder.

In this regard, in FIGS. 1 to 6, all the screw bolts (16) having the same thickness as the vertical bars (14) and the horizontal bars (15) of the reinforcing bar mesh (M) are moved downward to the reinforcing bar mesh (M). In addition to functioning more effectively as the above-mentioned fixed support by welding and unifying from
6) defines itself as easy to cut.

However, if the above-mentioned purpose can be achieved, as shown in the second modified embodiment of FIGS. 8 to 11, the full thread bolt (1) which is thicker than the vertical streak (14) or the horizontal streak (15).
6) may be welded and integrated with the rebar mesh (M) from above, or cross the front and rear ends of the treadboard (11) of the rebar mesh (M) along the left-right direction . In order to use the pair of horizontal streaks (15) as a full screw bolt (16), a screw may be formed throughout the entire horizontal streak (15).

(17) is the full screw bolt (1)
6) A pair of long hexagon nuts screwed to the left and right ends of the tread board (11), and the screw holes (18) are exposed at the left and right sides of the tread board (11). That is, all screw bolts (16) forming a fixing support for the reinforcing steel mesh (M).
Then, the nut (17) is fastened and integrated from the left and right directions, inserted into a forming mold (not shown) of the tread (S), and the concrete with the reinforcing fiber is poured into the mold. By doing so, the step board (S) as shown in FIGS. 1 to 6 is formed and hardened.

In this case, in the basic embodiment shown in FIGS. 1 to 6, the small screw hole (18a) for receiving the whole screw bolt (16) and the hexagon bolt for assembling, which will be described later, due to the thinness of the entire screw bolt (16). Two types of large screw holes (18b) are formed in the nut (17) as so-called stepped forms. As suggested from the second modified embodiment shown in FIGS. A screw hole (18) having the same diameter common to the hexagon bolt for assembly (16) and the nut (1) is used.
Of course, it is also possible to engrave to 7).

The full thread bolt (16) is welded and integrated with the reinforcing steel mesh (M), and hexagon nuts (17) are fastened to both left and right ends thereof. S) can be easily and stably inserted into the forming mold of S). By fastening a form tie (not shown) from the outside of the mold to the nut (17), the full screw bolt (16) can be attached. As a separator, it can also be used for assembling a mold.

When assembling the stepboard (S) of the present invention configured as described above as an internal staircase or an external staircase of a building, a pair of left and right hexagonal bolts (19) adapted to the nut (17) is used. ) And its bolt (19)
After a pair of left and right metal plate girders (21) are prepared in which the play holes (20) are distributed in advance in the opening distribution, the assembling work is performed as follows in a production factory or a construction site of the stairs. .

That is, the step board (S) is inserted and set between the left and right sides of the leading spar (21), and the facing spar (21) and the left and right sides of the step board (S) face each other. A pair of elastic packings (22) made of rubber, synthetic resin, or the like is further inserted between them. With respect to the method, it is desirable that an elastic packing (22) is previously bonded and integrated to the entire left and right side surfaces of the tread (S) so that the nut (17) is not closed.

4 to 6, the hexagonal bolts (19) for assembling each from the bolt play hole (20) of the above-mentioned slab beam (21) to the nut (17) of the tread plate (S). ) Is screwed in and firmly tightened by using tools.

In this case, the elastic packing (2) is provided between the facing slab (21) and the tread (S).
Since 2) is interposed, it is possible to stably and firmly integrate the two under a state where a compressive force is applied thereto, and furthermore, from the treadle (S) to the slab girder (21) during use as a staircase. ) Can be effectively and independently absorbed by the elastic packing (22).

The tread board (11) of the tread (S) has a reinforcing steel mesh (M) embedded in the whole tread board (11), and all the screw bolts (16) are welded integrally. Because during use as a stairs,
Although the treadboard (11) receives an acting force such as a bending deformation or a torsional deformation, the treading board (11) can effectively counteract the force and maintain excellent durability.

Further, the full screw bolt (16) not only serves as a fixing support for the reinforcing steel mesh (M), but also is assembled with the sash girder (21) by hexagon nuts (17) attached to both left and right ends thereof. It has a supporting member to be fastened to the hexagonal bolt (19), and the screw is literally engraved on the whole, so that it can be cut to an arbitrary length to change the width dimension in the assembly stairs. Therefore, it is possible to maximize the effect of mass production of the tread (S) in that sense.

[0027]

[Effects of the Invention] As described above, in the present invention, a concrete tread board (S) containing reinforcing fibers is interposed between the left and right sides of the metal plate slab girder (21).
Bolt loose holes (2
0) to the left and right side surfaces of the tread plate (S) by inserting a pair of hexagon bolts (19) to fasten and integrate the tread plate (S) and both slats (21).
Almost the entire tread board (11) that forms the tread board (S),
A pair of parallel full screw bolts (16) that embed the reinforcing steel mesh (M) and cross the front end and rear end of the treadboard (11) along the left-right direction are attached to the reinforcing steel mesh (M). Welded together and each full screw bolt (16)
Since the hexagon nuts (17) for receiving the hexagon bolts (19) are screwed and fastened to both left and right end portions, the problem of the prior art described at the beginning can be completely improved.

That is, the step board (S) for the assembly stairs according to the present invention.
In this case, the reinforcing steel mesh (M) is buried in almost all of the treadboard (11), which is combined with the fact that it is reinforced as a concrete product containing various fibers, so that the treadboard with more and more rigidity is provided. S) can be obtained.

The reinforcing steel mesh (M) has a pair of front and rear parallel members that cross the tread board (11) in the left-right direction.
Since all the screw bolts (16) are welded together,
The full screw bolt (16) can be stably inserted and set in a mold for forming a tread plate as a fixing member or a torsion bar of a reinforcing steel mesh (M), and the full screw bolt (16) can also be used as a separator. It is also possible to assemble the formwork.

Further, the full screw bolt (16) is provided with hexagon nuts (17) at both left and right ends thereof,
Since it also functions as a fastening support for the hexagonal bolt (19), the entire screw bolt (16) is used as the tread board (11).
Since the reinforcing plate mesh (M) occupying almost the entirety is welded integrally, the tread plate (S) assembled with the slab beam (21) by fastening the hexagon nut (17) and the hexagon bolt (19). Although the assembly work can be performed easily, it is remarkably stable and robust assembling state, and undergoes bending and pulling during use as stairs,
There is an effect that excellent durability strength against this can be maintained.

In particular, if the configuration of claim 2 is adopted,
Since all the screw bolts (16) are welded and integrated with the reinforcing steel mesh (M) from below, they work more effectively as fixing members for the reinforcing steel mesh (M), and the full screw bolts (16) are literally Since the screw is provided as a whole and is formed thin, it can be adapted to the width of the target stairs simply by cutting it to an appropriate length. There is no need to create and prepare many in advance. In this sense, the effect of mass production of the tread (S) can be maximized, which is very useful in practice.

[Brief description of the drawings]

FIG. 1 is a side view showing an assembling stair tread according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a side view showing an assembled state as a staircase.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is an enlarged sectional view taken along line 6-6 of FIG.

FIG. 7 is a side view showing a first modified embodiment of the tread corresponding to FIG. 1;

FIG. 8 is a side view showing a second modification of the tread plate.

FIG. 9 is a sectional view taken along line 9-9 of FIG. 8;

FIG. 10 is a sectional view taken along line 10-10 of FIG. 9;

FIG. 11 is an enlarged sectional view showing an assembled state as the stairs, and corresponds to FIG. 6;

[Explanation of symbols]

 (11) ・ Treadboard (13) ・ Rising faceboard (16) ・ Full screw bolt (17) ・ Hex nut (19) ・ Hex bolt (20) ・ Bolt play hole (21) (M) ・ ・ Reinforced steel mesh (S) ・ ・ Stepping board

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Shuji Shinohara 2-2-2 Otemachi, Chiyoda-ku, Tokyo Urbannet Otemachi Building NTT Urban Development Corporation (72) Inventor Ryoichi Hatano Tokyo Urban Netto Otemachi Building NTT Urban Development Co., Ltd. 2-2-2 Otemachi, Chiyoda-ku, Tokyo (72) Inventor Taki Tanizaki 3-2-1-17 Nishitenma, Kita-ku, Osaka-shi, Osaka・ In F.C. (58) Field surveyed (Int.Cl. ⁶ , DB name) E04F 11/02

Claims (2)

(57) [Scope of request for utility model registration] 1. A bolt joint which is set between two left and right facing metal-plated girders (21) by inserting a concrete treadboard (S) containing reinforcing fibers into the left and right sides of the girders (21). By inserting a pair of hexagon bolts (19) into the left and right side surfaces of the tread plate (S) from the hole (20), the tread plate (S) and the double-sided girder (21) are fastened and integrated. Almost the entire tread board (11) that forms the tread board (S),
The reinforcement steel mesh (M) is buried, and the front and rear ends of the treadboard (11) extend along the left-right direction.
A pair of parallel all threaded bolts (16) traversing Te, and integrally welded to the reinforcing steel mesh screen (M), the left and right end portions of each full threaded bolts (16), the receiving hex nut hexagonal bolts (19) ( 17) A tread for an assembling stair, wherein the tread is screwed together. 2. A spar beam (21) for tightening all screw bolts (16).
2. The tread for an assembling stair according to claim 1, wherein the tread is thinner than the hexagonal bolt (19) for assembling and is welded and integrated from below into the rebar mesh (M).