JPH11200578A - Concrete assembling stair and constitution thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a concrete stair in a short time and increase the productivity and reduce the cost by connecting stair plates and landing plates to precast concrete stringers and integrally forming risers and treads with the stair plate to join it to the adjacent stair plate. SOLUTION: Stair plates are fitted to make a row of steps 11 in multiple stages and girders 12, 13 for landings are extended at the upper and lower ends and integrally formed. The girders 13 for landing having a required width for fitting the landing are integrally extended at one or both of the upper and lower ends arranged in rows in the steps 11. When a cast-in-place concrete layer is formed in the girders 13 for landing, precast landing plates are fitted to obtain a stable landing. In this case, the stairs can be easily and efficiently produced by the precast system in factory production for precast concrete stringers 1, stair plates, landings, etc. In this way, respective precast members are miniaturized and concrete is easily placed into simple-shaped forms and products excellent in precision and strength can be obtained in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling stair made of concrete and a method of constructing the same. It is an object of the present invention to establish a technology capable of effectively eliminating or limiting the generation of noise or squealing noise.

[0002]

2. Description of the Related Art Stairs are a pivotal method for stably ascending and descending in a multi-layered building or a terrain or a structure having a height difference, and various stairs have been used for a long time. Especially in buildings, houses and offices, there are external stairs including internal stairs as well as emergency stairs.The materials used are wood, metal, concrete, stone, etc. There are various products for each.

[0003]

The prior art steps as described above are of various types, each having its own characteristics, but also having its own disadvantages. For example, those made of wood have shortcomings in durability and fire resistance even though they are excellent in lightness and softness, and they also have squeaks when climbing up and down. There are metal and concrete stairs mainly made of iron as those with excellent durability and fire resistance, but metal ones are susceptible to corrosion due to oxidation even if they are excellent in safety and strength Therefore, coating and other rust prevention measures should be repeated as appropriate, and a multilayer process such as undercoating, intermediate coating, and topcoating after rust removal is required. In addition, the metal stairs generate noise when ascending and descending, and even when soundproofing is performed, considerable noise is generated, and it is required to pay attention to the prevention of sound during climbing and descending at night and the like.

[0004] In contrast to the above-mentioned metal stairs mainly composed of iron-based metal, concrete stairs are excellent in durability and corrosion resistance are sufficient without requiring special rust prevention treatment. The reinforced reinforcements are buried in the concrete to prevent rust and provide good strength. In addition, almost no impact noise or squeaking noise or shaking is observed when the user climbs or descends. Although such concrete stairs have the merit of not being able to be used, the conventional technology for such concrete stairs is mainly constructed at the construction site. Therefore, a predetermined molding curing period is required together with the configuration of the formwork, the arrangement of the reinforcing bars, and the casting of the concrete, and furthermore, a proper surface finishing work after the mold is removed. There is requested, inevitably man-hours Kasami remarkably becomes a high cost, even those factory production inevitably heavy ones and, the disadvantage of such with significant difficulties in handling transportation.

[0005]

SUMMARY OF THE INVENTION The present invention has been made by studying to solve the problems in the prior art as described above, and has been developed by introducing a precast technique for the concrete stairs as described above. In addition, the unit molded as a preferable unit is carried into each construction site and assembled, or after assembling a part or the whole after the factory production, it is carried into the construction site and assembled so that at least the curing period can be reduced. Enables construction within a short period of time that is ignored, and makes full use of appropriate management by factory production to simplify production methods and respond to design conditions at each construction site effectively and appropriately. Successful, and staircases that adequately meet the needs of increased productivity, high quality, low price, and other requirements Be those was, is as follows.

(1) An assembling stair made of concrete, comprising a precast concrete girder, a stair plate and a landing plate, wherein the stair plate and the landing plate are connected and fixed to the girder.

(2) The concrete assembling staircase as described in (1) above, wherein a rising tread surface is integrally formed on the stair plate and connected to an adjacent stair plate.

(3) The above-mentioned (1), wherein the landing girder portion and the sarashira girder are integrally formed using a girder member and a precast concrete landing plate.
Item 2. The concrete assembly staircase according to any one of item 2 or item 2.

(4) One or two or more reinforcing members such as reinforcing steel bars and angle members, and metal fittings for connection and assembly such as bolts, hooks, nuts and washers are arranged on the precast concrete girder, stairway board and landing board, respectively. (1) to (3), wherein the steps (1) to (3) are assembled as stairs or connected or fixed to the steps and the frame.
Item 5. A concrete staircase according to any one of the preceding items.

(5) A concrete assembling staircase according to any one of the above (1) to (4), wherein a handrail is installed on the sasara girder or a side plate as a skirting board is integrally formed.

(6) Any one of the above items (1) to (5)
The above-mentioned girders, stairs, and landing boards are individually produced at the factory and transported to the construction site. A method for constructing a concrete assembly staircase, characterized in that it is connected and connected.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a first embodiment of the present invention; FIG. A plurality of stair plates 2 and at least one or two landing plates 3 are used, and a concrete stair is formed by connecting such a slab 1, stair plate 2 and landing plate 3. is there.

FIG. 1A shows a typical example of the structure of the above-mentioned sash girder portion 1. In FIG. 1A, a step portion 11 for attaching a stair plate 2 and forming stairs in multiple steps is arranged in a row. A relatively short landing girder 12 or 13 is formed integrally at the upper end and the lower end thereof, respectively. Further, as shown in FIG. 2B, a landing girder 13 having a required required landing width for attaching the landing 3 to one or both of the upper end and the lower end of the row of the stairs 11 described above. , 13 are integrally formed on the upper and lower sides and when a cast-in-place concrete layer is formed in the landing girder 13, a precast landing plate can be attached to provide a stable landing.

As for the step board 2, it is preferable to integrally form a riser plate 22 below the front end of the tread surface 21 as shown in FIG. 2 (A), but in some cases, as shown in FIG. 2 (B). The riser plate 22 may be formed on the upper rear side of the tread surface 21. In any case, as shown in FIG. 2 (C), the stair plate 2 is set and supported on the upper surfaces of the above-mentioned slabs 1 and 1 located at both ends thereof.

One of the typical concrete constructions of the concrete staircase 10 of the present invention formed by using the above-mentioned sasara girder 1, stair plate 2 and landing plate 3 is as shown in FIGS. 3 and 4. A stair plate 2 is provided for each of the slabs 1 and 1 provided on both sides, and a landing 3 is connected to one of the upper end, the middle and the lower end of such a stair. It is as shown in the figure that it is fixed by the mounting bracket 5 provided on the frame 4 as shown in FIG.

As shown in FIG. 3, when the landing 3 is formed at an intermediate portion of each level of the frame 4 and the stairs are formed in a folded shape, the side surfaces of the stairs formed as described above, particularly, It is preferable to provide a handrail 6 on the side surface of the intermediate portion to make the lifting and lowering safe and easy, as shown in FIG.

Each member 1 in the present invention as described above,
In (2) and (3), appropriate reinforcing bars and reinforcing bars or fittings for connecting and mounting conventionally used as such precast concrete products are appropriately provided and adopted. The specific arrangement relationship of such reinforcing bars or mounting brackets is typically as shown in FIG. 5 (A) with respect to the above-mentioned stair plate 2, and the crossed reinforcing bars 7 are provided at the intermediate portion in the member cross section. And a member 8 such as a long nut for connection is attached at a predetermined position,
Furthermore, it is fixed to the connecting hardware 9 attached to the spar 1 by bolts 19, so that the attachment between the members can be easily and accurately performed.

Further, as shown in FIG. 5 (B), such an attachment may have an opening 31 formed in the step board 2 and a bolt 3 attached to the reinforcing bar 27 in the slab 1 as well.
After forming a concave hole portion 32 in which 9, 39 are planted, a U-shaped bending bolt 38 to be connected to the bolts 39, 39 as described above is set in the opening portion 31 and welded by a welding portion 37, and then A filler 36 made of concrete or mortar is loaded into the opening 31 and the concave portion 32 so that the stair plate 2 and the slab 1 can be integrally connected via bolts 38 and 39.

As shown in FIG. 5C, the step board 2 is attached to the slab 1 as described above.
U-shaped bending bolt 38 attached as shown in FIG.
Can be directly welded and fixed to the reinforcing bar 27 of the slab girder 1, so that the same fixed connection relationship as that of FIG. Can be formed.

FIG. 6 and FIG. 7 show one more detailed example of the attachment relation to the frame.
(A) shows the above-mentioned sasara girder 1 mounted on a mounting support bracket 5 mounted on a frame member 15 such as an H-section steel.
10 and 11, which are fixed to a landing girder 9 formed as a body side girder 13 or 12 by a connecting bolt 19 using a bearing member 19b and a height adjusting bolt 19a. It is. FIG. 6 (B)
In this case, the girder 1 is placed on the frame member 15 and the connecting member 19
6 (C) shows a case where the landing girder of the sasara girder 1 is supported by the frame projection 29 and attached with the connecting bolt 19. It is preferable that a plurality of connection bolts 19 are employed as shown in FIG.

In FIG. 8, the above-mentioned sasara girder 1 is shown.
9 is provided with a skirting part 14, but FIG.
FIG. 1 shows an example of a staircase according to the present invention formed by employing such a baseboard portion 14 and a handrail portion 6. That is, a landing section 3 is formed at each end of a stair 20 composed of a slab 1 and a step board 2 to form a series of stairs. Is formed as shown in the figure.

FIGS. 10 and 11 show a desired landing by appropriately extending the landing to the landing girder 12 or 13 having a different length as shown in FIGS. 1A and 1B. The manner in which the length 30 is configured is shown. That is, the landing girder 12 or 13 of the sasara girder 1 prepared as a precast product is provided with a erected support 15 between itself and the frame 4 at each construction site, and post-cast concrete 18 is applied. After-cast concrete 18 thus obtained
A precast landing board 17 is provided on the top, and the desired landing 30
Can be formed easily and accurately.

That is, the stairs according to the present invention are easily set by setting the landing girder 12 or 13 on the erection support 15 as described above. The target landing 30 having an appropriate size on the erection support 15 for the girder 12 or 13 is effectively finished.

FIG. 9 shows that the handrail 6 according to the present invention obtains a preferred staircase in which the handrail 6 is formed. As shown in FIG. 12, the handrail 6 has a series of support members 6b and a handrail member 6a. And the intermediate connecting member 6c is formed as shown in the drawing, and the members 6a to 6c
Are integrated, and can be configured as having a preferable strength.

According to the present invention as described above, the girder, the stairs and the landing are made of precast concrete, and the girder, the stairs and the landing are made simple and efficient by the pre-cast system manufactured by the factory. We will manufacture it as an accurate product.
That is, since each of the above precast members is reduced in size and has a simple plate-like shape or a shape similar thereto, it is easy to fill or densify concrete in the mold, and is excellent in accuracy and strength in a short time. Obtained as a product. In addition, since it becomes plate-like or similar as described above, it is easy to arrange them by arranging tiles and other various finishing materials or reinforcing members and anti-slip members in a mold in forming the precast member and easily forming them. Can be provided as being disposed on the surface or in the cross section, and the bonding strength and the like can be provided as being high. Furthermore, those products are arranged and stored separately in a compact form,
Transport and transport them to the construction site, greatly reducing the cost of producing or organizing and transporting them.

The stair plate and the landing plate are connected to the above-mentioned girder and fixed at the construction site, so that the concrete stairs according to the conventional method can be prepared and erected in a large number of mold members, and cured after the concrete is cast. It eliminates the need for such operations as mold and formwork dismantling, and is provided within a short period of time and at relatively low cost.

Since the landing board is constituted by a landing girder and a precast landing board which are continuously formed integrally with the end of the sasara girder, the width can be changed appropriately in response to the conditions at each site. In this way, it is possible to form a landing that has a proper landing, and appropriately provides the advantages of the present invention as described above.

Further, the above-mentioned stair plate has an integral staircase in which the rise tread surface is formed integrally and the rise tread surface is connected to an adjacent stair tread plate so that the space between the stair plates is closed. Even in the case of outdoor use, dustproofing and waterproofing are completely achieved, and a preferable strength characteristic is obtained irrespective of the strength of the staircase, in which the steps are connected and integrated with each other to combine the individual parts.

The present invention is a type of connecting and assembling metal fittings such as bolts, nuts, hooks, and locking hole members for precast concrete slab girder, stair treads, and landings, respectively. Or, by arranging two or more kinds, assembling as stairs, or connecting or fixing the stairs and the frame, it is possible to obtain appropriate strength with a relatively thin layer member and to facilitate assembly and connection. Further, the connection and fixation to the frame or the like can be simplified and accurately performed.

Further, in the present invention, the side rails for handrails or skirting boards are integrally formed on the sasara girder, so that the handrails or skirting boards can be effectively used, and stairs which are safe and preferable in use can be provided at a low cost as described above. Form and provide suitable precast concrete products.

In the present invention, the above-mentioned sasara girder, stairs board and landing board are manufactured in a factory, assembled as appropriate, transported to the construction site, and assembled and connected to the frame at the construction site. By doing so, it is possible to effectively and appropriately obtain the above-mentioned advantages in manufacturing and construction.

[0032]

According to the present invention as described above, both the characteristics of the conventional concrete and steel steps are sufficiently provided, and the durability of wooden steps and the noise and corrosion at the time of ascent and descent in metal steps are provided. Advantageous solution that completely eliminates disadvantages such as performance, and forms a preferred staircase that effectively secures the strength of members etc. in a relatively low cost and in a short period of time, greatly improving the staircase in various buildings and structures. It is an invention that is intended for construction and has a large industrial effect.

[Brief description of the drawings]

FIG. 1 is a side view showing a slight example of a girders according to the present invention.

FIG. 2 is a partial perspective view of a step portion and a partial side view showing an assembled state of the slab beam in the present invention.

FIG. 3 is a plan view of a staircase forming a landing according to the present invention.

FIG. 4 is a side view of what is shown in FIG.

FIG. 5 is a cross-sectional view typically showing a reinforcing bar arrangement relation and a mounting relation to the sasara girder of the stair plate and the sasara girder according to the present invention, wherein FIG.
FIGS. 7B and 7C show the case of the welding method.

FIG. 6 is a partial side view showing some examples of a state in which a slab girder is attached to a skeleton steel frame member or a skeleton protrusion.

FIG. 7 is a partial bottom view of the one shown in FIG. 6 (A).

FIG. 8 is a side view showing one example of a sasara girder integrally formed with a skirting board.

FIG. 9 is a perspective view showing an example of a staircase according to the present invention in which a handrail is attached together with a skirting board.

FIG. 10 is a side view showing an embodiment in which a landing girder is formed on a spot where a relatively long landing girder is formed.

FIG. 11 is a side elevational view showing an embodiment in which a landing hall is further constructed on a structure where a relatively short landing girder is formed on a sasara girder as in FIG.

FIG. 12 is a side view of an example of a staircase according to the present invention in which a handrail is also provided on a slab.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sasara girder 2 Step board 3 Landing area 4 Body 5 Mounting support bracket 6 Handrail 7 Reinforcing bar 8 Connecting member such as long nut 9 Connecting hardware 10 Concrete stairs 11 Step 12 Land girder (relatively narrow) 13 Landing area Girder (relatively wide) 14 Skirting board 15 Temporary support base 16 Tile and other finishing members 17 Precast landing plate 18 Post-cast concrete 19 Connection fixing bolt 19a Level bolt 19b Bearing member (load receiving member) 20 Stairs 21 Tread 22 Kick Upper plate 27 Reinforcing bar (of the slab girder) 29 Structural projection 30 Landing length 31 Opening 32 Concave hole 36 Concrete or mortar filler 37 Weld 38 U-shaped bending bolt 39 Bolt

Claims (6)

[Claims] An assembling stair made of concrete, comprising a precast concrete girder, a stair plate and a landing plate, wherein the stair plate and the landing plate are fixedly connected to the girder. 2. The concrete assembling stair according to claim 1, wherein a rising tread surface is integrally formed on the stair plate and connected to an adjacent stair plate. 3. A precast concrete landing plate and a girder member formed integrally and integrally with a landing girder portion and a sasara girder.
The staircase made of concrete described in any one of the above. 4. A reinforcing material such as a reinforcing bar or an angle material, and one or two or more kinds of metal fittings for connecting and assembling such as bolts, hooks, nuts and washers are provided on a precast concrete girder, a step board and a landing board, respectively. The concrete staircase according to any one of claims 1 to 3, wherein the staircase is assembled or the stairs and the frame are connected or fixed. 5. A side girder, wherein a handrail is installed or a side plate as a skirting board is integrally formed on the slab.
The staircase made of concrete described in any one of the above. 6. The sasara girder, the stairs board and the landing board according to any one of claims 1 to 5 are individually manufactured in a factory and transported to a construction site, or the stairs and the landing board are placed on the sasara girder. A method for constructing a concrete assembling staircase, characterized in that it is transported to an assembling work site, assembled and connected and attached to a skeleton.