KR100930281B1 - Attachment bracket of steel stairway and attachment device and attachment method of steel stairway - Google Patents

Abstract

(Problem) Since the mounting bracket 5 which is a part of the flooring mold is used and the steel stairway is supported on the flooring mold, support is unnecessary and construction is carried out accurately. The stairway can be removed from the steel stairway and the landing can be cast in place.

(Measures) The steel frame staircase 20 facing downward from the attachment bracket 5 of the floor 23 of the existing reference layer F ₀ is fixed (a). At the same time, the floor frame 24 for the next floor F ₁ is constructed, and the lower end of the steel staircase 20A upward is fixed to the mounting bracket 5, and the intermediate stairway (20A) is attached to the steel staircase 20A. 21), connect the steel staircase (20B). Another attachment bracket 5 fixed to the upper end of the steel staircase 20B is fixed to the mold 24 of the F ₁ layer (b). The concrete is poured, and the next layer F ₁ is constructed while the upper surface of the concrete is flattened using the upper edge of the mounting bracket 5 as a measurer (c). After the concrete has solidified expression, the inner surface off the unnecessary a mold or the like, the construction of the structural body including the concrete floor 23 of the next layer (F ₁₎ is completed, and is also built steel gedan (20A, 20B) (d) .

Description

Attachment bracket of steel stairway and attachment device of steel stairway and attachment method {AFFIX STEEL MEMBER OF STEEL FRAMED STAIRS, AFFIX APPARATNS AND METHOD THEROF}

Figure 1 (a) is a perspective view of an embodiment of the mounting bracket of the present invention.

Fig. 1B is a plan view of the same.

Fig. 1C is a partially enlarged cross-sectional view of the embodiment.

Figure 1 (d) is a partially enlarged cross-sectional view of another embodiment of the insert.

Figure 2 (a) is a perspective view of another embodiment of the mounting bracket of the present invention.

2B is a plan view of the same.

FIG. 3 is an embodiment in which the middle tier is made of steel stairway, and a part of the plan view is omitted, and the reference layer F ₀ is displayed.

4 is a plan view with a part omitted, and shows the layer F ₁ to be constructed.

FIG. 5 is a cross-sectional view taken along the line A-A of FIG. 3.

(A) is an expanded sectional view in the B-B line | wire of FIG.

FIG. 6B is an enlarged view of part C of FIG. 3.

FIG. 7A is an enlarged cross-sectional view of the D-D line of FIG. 4.

FIG. 7B is an enlarged cross-sectional view of the E-E line in FIG. 4.                 

Fig. 8A is an enlarged cross sectional view of the G-G line of Fig. 3.

FIG. 8B is an enlarged cross-sectional view of the H-H line in FIG. 3.

FIG. 9 is a plan view in which another part of the embodiment in which the intermediate layer is a site compacting concrete structure is omitted as another embodiment of the present invention, and shows the reference layer F ₀ .

Figure 10 shows the layer (F ₁₎ for building, a plan view omitting the same portion.

FIG. 11 is a cross-sectional view taken along line II of FIG. 9.

12 is a cross-sectional view taken along the line G-G of FIG. 3 according to an embodiment using the present invention, (a) after joining the steel stairs, and (b) shows before joining the steel stairs.

13 (a) to 13 (d) are views for explaining a method for attaching a staircase of the present invention.

14 (a) to 14 (f) are diagrams illustrating another attaching method of the stairs of the present invention.

15 is a mounting bracket according to the fourth embodiment of the present invention, where (a) is a plan view, (b) is a front view, and (c) is a rear view.

Fig. 16A is an enlarged view of part J of Fig. 15A, and (b) is an enlarged view of part K of Fig. 15A.

(A) is sectional drawing in the M-M line | wire of (a), (b) is sectional drawing in the same N-N line | wire, (c) shows sectional drawing in the P-P line of FIG.

FIG. 18 is a plan view showing the state in which the steel stairway is joined to the mounting bracket in Examples 4 and 5. FIG.

19 is an enlarged cross-sectional view taken along the line Q-Q of FIG.                 

20 is an enlarged cross-sectional view of the R-R line in FIG. 18.

FIG. 21 is an enlarged sectional view taken along line S-S of FIG.

Fig. 22 is a plan view of a staircase constructed by Examples 4 and 5 of the present invention.

23 is a longitudinal cross-sectional view.

Description of the main parts of the code

One; Rectangular plate 2; Support plate

3,4; Fixing bracket 5; Attachment Bracket

6; Insert 7; Bolt (for insert fixing)

8; Nail holes 9; Perspective hole (for insert fixing)

10; See-through hole (for fixing steel stairways) 11; Bolt (for fixing steel stairs)

12; Nuts (for fixing stairways) 13; Bolt shape

14; Nuts (for fixing bolt-shaped brackets) 21a; U-shaped rebar

16; Rib 17; Slender torii

18; See-through hole (thin purlin) 19; Scaffolding

20,20A, 20B, 20C; Steel staircase 21; Mezzanine

23; Concrete flooring 24; Floorboard

25; Support 26; Staircase

28; Mezzanine concrete floor 29; Middle landing frame

31; Mountain river 32; Perspective hole

33; Fasteners 34; Perspective hole                 

35; Rebar (anchor) 38; Pipe support

51,54; Opening 60,64; Siege

70; Closing plate

The present invention relates to an attachment bracket, an attachment device, and an attachment method of a steel frame staircase for the purpose of closely and reliably connecting a staircase and a concrete floor, and to improve the strength and reliability of the joint.

Background Art Conventionally, steel frame staircases and floor concrete are known to have a nut embedded in floor concrete in which a bolt inserted through a step is fixed by screwing.

According to the said conventional method, in order to embed a nut etc. in floor concrete previously, there exists a mold in a staircase side. So, after hardening concrete, the mold had to be removed and the stairs attached. Thus, there are problems such as a gap between the nut and the hole of the stepped portion, or a time-consuming installation and removal of the mold.

In addition, in the case of installing the steel staircase by attaching in advance, the steel staircase that extends upwards must be assembled on the layer where concrete is placed, and there is a problem in that there are many temporary members because the support types of the hypothesis supporting the steel staircase are needed. there was.

The present invention succeeds in improving the above-mentioned conventional problems by using a stair attachment bracket for the form floor of concrete floor.

That is, the present invention, the support plate in a direction perpendicular to the lower end of the rectangular plate of the same height as the floor concrete floor to be built so as to be attached to the hypothetical flooring frame, to at least one of the rectangular plate and the support plate, It is an attachment bracket of the steel staircase characterized in that the insert attachment means is formed, and the steel stair attachment means is formed.

In the above, the insert attaching means is a bolt hole, the steel stair attaching means is a steel bracket attaching bracket, characterized in that the fixing bracket pieces that can be fixed with the narrow purlin of the steel stair. Further, in the above, on one side of the rectangular plate, the one surface on which the support plate is extended is the floor concrete attachment side, and the other side is the stairway attachment side, and on one side or the support plate of the rectangular plate, a thin purlin And protruding fixing bracket pieces for fixing to form a steel stair attachment means, forming openings in the rectangular plate at positions corresponding to the fixing bracket pieces, and surrounding the openings and fixing bracket pieces on the support plate. It is an attachment bracket of the steel staircase characterized in that the siege fixed.

In addition, another invention, while fixing the steel stair attachment bracket to the end of the steel staircase, at the same time to install the steel stair attachment bracket to the end of the concrete floor, the insert fixed to the steel stair attachment bracket embedded in the concrete floor Attachment device of the steel staircase characterized in that.

Another invention is a method for attaching a steel staircase, comprising the following steps.
(1) arranging the steel staircase in which the steel stair attachment bracket with the insert is fixed to the upper end at the step construction position;
(2) fixing the lower end of the steel staircase to the floor of the existing floor, and fixing the steel stairway attachment bracket to the flooring frame of the floor to be constructed, as part of the flooring frame;
(3) placing concrete on the floor to be built, embedding the insert of the steel stairway attachment bracket, and forming concrete floor on the floor to be built;

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Another invention is a method of attaching a steel staircase, which has the following steps.
(1) arranging the first steel staircase of a half-layer, in which one side of the steel staircase mounting bracket with an insert is fixed to the upper end at the step construction position;
(2) fixing the lower end of the first steel staircase to the floor of the existing layer, and fixing the steel stair attachment bracket to the middle landing frame for the intermediate landing of the planned construction, and making it part of the middle landing frame; Wow,
(3) After placing the concrete in the middle tier, place the second steel staircase for the half-layer, in which one side of the steel stair attachment bracket with the insert is fixed to the upper end at the stair construction position;
Before placing the concrete in the interlocking ground, place the second steel stairs, which is half layered, in which one side of the steel stair attachment bracket with the insert is fixed to the upper end at the step construction position, and then the concrete in the middle landing To do that,
(4) While fixing the lower end of the second steel stair step to the other side of the steel stair attachment bracket on the intermediate landing frame, the steel stair attachment bracket of the second steel stair step to the floor mold of the floor to be constructed Fixing it to be part of this flooring mold,

(5) placing concrete on the floor to be built, embedding the insert of the steel stairway attachment bracket, and forming concrete floor on the floor to be built;

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In the above invention, the mounting bracket is carried in the site with only the lower steel staircase fixed, and then the lower end of the upper staircase is fixed to the mounting bracket. As for the upper staircase, the concrete of the lower floor is installed before or after pouring, and before and after it is decided only according to the condition of the building.

In the above invention, the fixing bracket and the insert are fixed to each other using a bolt nut, and any other conventionally known fastening means such as welding can be used. In addition, there is no restriction on the shape of the insert.

In addition, since the mounting bracket is used as a part of the mold and remains as a stair support member, it is not only reinforcement of the attaching part of the stairs, but also maintains the mold firmly, and may also be a connecting member of the upper and lower stairs as described above. .

In addition, the upper edge of the floor concrete can be set by approaching the upper surface of the mounting bracket.

(Embodiment of invention)

The supporting plate 2 in the transverse direction is delivered to the lower end of the longitudinal rectangular plate 1 having the same height as the thickness of the floor to be built. The fixing bracket pieces 3 and 4 for fixing the steel frame stairs 20 are vertically fixed to the surface 1b of the rectangular plate 1. The Y-shaped insert 6 is screwed into the bolts 7, 7, inserted into the see-through holes 9, 9 of the rectangular plate 1 (Fig. 1 (c)). Nail holes 8 and 8 for drilling through holes 10 and 10 in the fixing bracket pieces 3 and 4 of the rectangular plate 1 and fixing them to the support frame 2 to the mold 24 for flooring. ) Is installed to form the mounting bracket 5 (Fig. 1 (a) (b)).

In addition, the invention of the device connects the mounting brackets 5 to the upper and lower ends of the steel frame stairs for one layer, and inserts the inserts 6 of the mounting brackets 5 on concrete floors to fix the steel stairs. When the steel staircase is divided into two, the mounting bracket 5 is fixed to the lower end of the lower steel staircase, and the mounting bracket 5 is fixed to the upper end of the upper steel staircase. In the case where the intermediate stairway is not made of steel stairway and is made of site-ground concrete, the mounting bracket 5 for intermediate stairway is further fixed to the upper end of the lower steel stairway and the lower end of the upper steel stairway, respectively.

(Example 1)

An embodiment of the mounting bracket 5 of the present invention will be described with reference to FIG. 1, FIG. 2, FIG.

The iron plate is bent to form a structure in which the support plate 2 is extended at right angles to the lower end of the rectangular plate 1 having the same height as the thickness of the floor concrete to be constructed. On the surface of the said rectangular plate 1, the surface on the side of the support plate 2 is made into the surface 1a, and the surface on the opposite side to the support plate 2 is made into the surface 1b. A rib 16 is temporarily installed between the surface 1a of the rectangular plate 1 and the upper surface of the support plate 2 to hold the angle between the rectangular plate 1 and the support plate 2 (FIG. 1 (FIG. 1 (FIG. 1)). b)). In the rib 16, the notches 16a are formed in the vicinity of the corners of the rectangular plate 1 and the support plate 2 so that concrete flows (Fig. 1 (c)).

Fasten fixing bracket pieces 3 and 3 for fixing the steel staircase 20 to the both ends of the surface 1b of the rectangular plate 1 vertically, and equally fasten the fixing bracket pieces 4 vertically to the center part. Stick. Moreover, the said rectangular plate 1 is provided with the appropriate space | interval in a horizontal direction, and is provided through the through-holes 9 and 9. On the surface 1a side of the rectangular plate 1, a Y-shaped insert 6 is disposed, and the bolt 7 inserted into the see-through holes 9 and 9 from the other surface 1b side, 7), the insert 6 is fixed (FIG. 1 (c)).

In addition, in order to fix it with the thin purlin of steel frame stairs, the fixing hole pieces 3 and 4 of the said rectangular plate 1 are provided with the through-holes 10 and 10 which communicate with the see-through hole of a thin purlin. . In addition, nail holes 8 and 8 for fixing the mold 24 for the floor and the support plate 2 are installed in the support plate 2 at appropriate intervals. As described above, the mounting bracket 5 is constituted (Fig. 1 (a) (b)).

In the above embodiment, the insert 6 is formed by forming the tip in a Y-shape. The bolt is fastened to the bolt-shaped bracket 13 by a U-shaped reinforcing bar 21a of an appropriate length and penetrated through the see-through hole 9. The nut 14 may be screwed onto the threaded portion of the shaped bracket 13 (Fig. 1 (d)).

In the above embodiment, when the insert 6 and the U-shaped reinforcing bars 21a are used, there is no welding operation, and thus the rectangular plate 1 is preferably not deformed, but the welding of the rectangular plate 1 is preferable. It is also possible to weld and fix the reinforcing bars 35 and 35 for the insert (Fig. 12 (b)).

In the above embodiment, the ribs 16 are provided between the rectangular plates 1 and the support plates 2 to reinforce and shape the ribs 16. Instead of the ribs 16, the rectangular plates 1 and the support plates 2 are provided. ), Both ends of the rebar 35a arranged at an angle may be welded (Fig. 12 (a) (b)).

Further, in the above embodiment, the fixing bracket pieces 3 and 4 provided by drilling through-hole holes 10 and 10 communicating with the see-through hole 18 of the slender purlin 17 of the steel staircase 20 are fixed. Although it can be set as another structure (FIG. 2, FIG. 12).

That is, between the narrow purlins 17 and 17 of the steel staircase 20, a mountain-shaped steel 31 provided by drilling through holes 32 and 32 is temporarily installed (FIG. 12 ( b)) Fixing bracket piece which consists of the mountain-shaped steel piece which provided in the surface 1b of the rectangular plate 1 of the mounting bracket 5, and provided the through-hole 34 corresponding to this see-through hole 32,32. (33, 33) is fixed and configured (FIG. 2 (a) (b), FIG. 12 (b)). In this case, the flange of the mountain-shaped steel 31 of the steel step 20 is placed on the fixing bracket pieces 33 and 33 of the mounting bracket 5, and the bolt 11 is placed between the see-through holes 32 and 34. Insert the nut, screw the nut 12, and fix the steel staircase 20 and the mounting bracket 5 (Fig. 12 (a)).

(Example 2)

Next, the construction method of the present invention will be described with reference to Figs.

[Configuration of Steel Stairs]

Both ends of the footrests 19 and 19 arranged in the step shape are pinched and fixed with the thin steel purlins 17 and 17, and the steel frame steps 20 are comprised. Perspective holes 18 and 18 are drilled and provided in a part of the slender purlin 17 fixed to the floor structure (attachment). In addition, the intermediate layer landing 21 made of iron plate, which can be fixed to the other side of the thin purlin 17 is prepared. The scaffold 19 is formed by sandwiching a mortar-based scaffold with a thin steel sheet bent in a step shape.

The steel stair step 20 forms a half-floor, and combines the two steel stair steps 20 and 20 and the middle stairway 21 to form a step for one floor.

In addition, the attachment bracket 5 is fixed to the upper end of the slender purlin 17 of the steel frame staircase 20B before being brought into the construction site or after being brought into the construction site. That is, the fixing brackets 3 and 4 of the mounting bracket 5 are attached to the narrow purlins 17 and 17, the bolt 11 is inserted into the see-through holes 10 and 18, and the nut 12 is screwed. Tighten it. At this time, the steel frame stairs 20B are fixed to one side 5a of the mounting bracket 5, and the steel frame stairs are not provided on the other side 5b (Fig. 4, etc.).

In the above embodiment, the staircase was composed of the steel staircase 20A, 20B and the middle stairway 21, and the steel staircase 20A, 20B, in which the foothold part and the middle stairway piece are integrated, may be used (not shown). . In this case, the intermediate landings constitute both middle landings.

[How to build]

(1) In the reference layer (base layer) F ₀ , a concrete floor 23 is constructed in a state where the steel staircase 20 facing downward is fixed to one side 5a of the mounting bracket 5. ((A), FIG. 3, and (a) (b) of FIG. 13).

(2) The frame and the reinforcing bar, including the frame 24 for the floor, for constructing the planned construction layer F ₁ (the next layer of F ₀ ), are constructed by a conventional method. At this time, for example, the flooring mold 24 is supported by the supports 38 and 38 through the butter pipes 36 and 37 arranged horizontally (FIGS. 5, 7 and 8).

Further, in parallel with or after the construction of the frame 24 and the reinforcing bar for the floor, one steel stair step 20A and the middle stairway step 21, which are directed to the construction scheduled floor F ₁ (the next floor of the F ₀ ). ), The other side of the steel stair step (20B) is placed (Fig. 13 (a)). One end 5a of the mounting bracket 5 is fixed to the upper end (connection portion with the next layer) of the steel frame step 20B on the other side.

(3) The bolt 11 and the nut 12 are attached to the other side 5b of the mounting bracket 5 of the reference layer F ₀ (predetermined). At the same time, the middle layer landing 21 is fixed to the other side of the steel staircase 20A and the lower end of the steel staircase 20B with bolt nuts. In addition, the mounting bracket 5 of the steel staircase 20B is mounted on the floor mold 24 for the floor to be constructed F ₁ , and nailed through the nail holes 8 and 8 of the support plate 2. , Fixing bracket 5 and flooring mold 24 (FIG. 13 (b)). At this time, the fitting bracket 5 (steel staircase 20B) can be easily positioned at the correct position only by fitting it to the streak position on the upper surface of the floor mold 24. In addition, the lower surface of the intermediate layer landing 21 is supported by the box type support 25.

By the above operation, the steel frame stairs 20A and 20B are hypothesized, and can also be used as work stairs. At this time, since the rectangular plate 1 of the mounting bracket 5 functions as part of the floor mold as a formwork, construction of the floor mold in the stepped portion is reduced. In addition, since only the support for supporting the intermediate landing 21 can make unnecessary support for supporting the steel stairs 20A and 20B, the construction work for constructing the structure and the steel stairs can be greatly reduced. .

(4) Next, concrete is poured on the mold including the floor mold 24 (FIG. 13 (c)). At this time, since the upper edge 1c of the rectangular plate 1 of the mounting bracket 5 can be used as a measuring instrument, the upper surface 23a of the concrete, which has not yet solidified, can be flattened, thereby reducing concrete pouring and leveling work. (A) and (b). In addition, although the steel stairway 20 which goes to the upper layer is not joined to the other side 5b of the mounting bracket 5, since it is closed by a rectangular plate, there is no problem in placing concrete (FIG. 4).

In addition, in the above, in the intermediate landing 21, the anchor reinforcing bar 22 penetrating the end is embedded in the staircase chamber wall 26 made of concrete, and fixed to the structure (Fig. 6 (a)). In Fig.6 (a), 27 is a steel bar for stair room walls.

(5) After the concrete is solidified, if the mold 24, the unnecessary mold 38, the support 38, and the like are removed, the structure including the concrete floor 23 of the next layer F ₁ is removed. Is completed (Fig. 13 (d)).

Here, since the inserts 6 and 6 of the mounting bracket 5 are embedded in the concrete, the steel frame steps 20A and 20B are fixed to the structure through the mounting bracket 5. In addition, since the mounting bracket 5 is left as a casting mold and the lower end of the concrete floor 23 is reinforced with the mounting bracket 5, this part can be reinforced. In addition, the nail which protruded below from the said mounting bracket 5 is cut | disconnected by the conventional method.

(6) From the above, the construction of the steel frame stairs is completed (FIGS. 4 and 5). Steel frame stairs 20C of the next layer and the like are also assembled (FIG. 4).

(Example 3)

9 to 11 and 14, another embodiment of the method of constructing the stairs of the present invention will be described. In the said Example 2, although the intermediate | middle layer landing 21 of the steel frame made already was used, in this Example, it is an Example which is constructed in the field by using the intermediate layer landing as reinforced concrete agent.

(1) In the reference layer (base layer) F ₀ , a concrete floor 23 is constructed in a state where the steel staircase 20 is fixed downward from one side 5a of the mounting bracket 5 ( 14 (a), 9, 8 (a) (b)).

(2) The frame and the reinforcing bar, including the frame 29 for the landing, for constructing the intermediate landing layer F _0-1 (intermediate layer between F ₀ and F ₁ ), which are to be constructed, are constructed by a conventional method. At this time, for example, the floor mold 24 is supported by the supports 38 and 38 through the butter pipes 36 and 37 arranged horizontally (Fig. 11).

In addition, the steel frame stairs 20A on one side are arranged in parallel to or after the construction of the mold 29 and the reinforcing bar toward the (F _0-1 ) floor to be constructed (FIG. 14A). One side 5a of the mounting bracket 5 is fixed to the upper end (connection portion with the next layer) of the steel frame staircase 20B on the other side.

(3) In the same manner as in Example 2, the slender purlin 17 at the lower end of the steel staircase 20A is attached to the bolt 11 and the nut 12 to the mounting bracket 5 of the reference layer F ₀ (existing). At the same time, the mounting bracket 5 of the steel staircase 20A is mounted on the frame 29 of the stairway F _0-1 to be constructed, and the nail holes 8 and 8 of the support plate 2 are fixed. Nail the nail in, fixing the attachment bracket 5 and the flooring mold 24 (Fig. 14 (b)). At this time, the fitting bracket 5 (steel staircase 20A) can be easily positioned at the correct position only by matching the position of the upper surface of the mold 29 to the streak position.

(4) Next, on the mold including the mold 29, concrete is poured to construct the intermediate floor landing 28 (FIG. 14 (c)). In addition, the steel staircase 20B heading from the other side 5b of the attachment bracket 5 of the (F _0-1 ) layer to the upper layer is not joined, but closed by the rectangular plate 1, which prevents the casting of concrete. There is no

In addition, although the box-shaped support for supporting the intermediate landing was hypothesized in the second embodiment, in the present embodiment, the intermediate landing was also cast in place. Therefore, only the frame for constructing the structure can make unnecessary all kinds of supports only for supporting the steel frame steps 20A and 20B.

(5) After pouring the concrete of the intermediate layer (F _0-1 ) layer, the steel frame staircase 20B having one side 5a of the mounting bracket 5 fixed to the upper end (connection portion with the next layer). It arrange | positions (FIG. 14 (c)).

(6) The other end 5b of the mounting bracket 5 of the middle layer engaging (F _0-1 ) layer of the steel staircase 20A has the same lower end of the steel staircase 20B on the other side, and the bolt 11, At the same time as fixing with the nut 12, the mounting bracket 5 of the steel staircase 20B is mounted on the flooring frame 24 of the floor to be constructed F ₁ , and the nail holes 8 of the supporting plate 2 are mounted. At 8, the nail is nailed and the attachment bracket 5 and the flooring mold 24 are fixed (Fig. 14 (d)). At this time, for example, the flooring mold 24 is supported by the supports 38 and 38 through the butter pipes 36 and 37 arranged horizontally (FIG. 11).

(7) Next, concrete is poured on the mold including the floor mold 24 (FIG. 14 (e)). At this time, the upper edge 1c of the rectangular plate 1 of the attachment bracket 5 can be used as a measuring instrument, and the upper surface 23a of concrete which has not yet solidified can be made uniform. In addition, although the steel stairway 20 which goes to the upper layer from the other side 5b of the mounting bracket 5 is not joined, since it is closed by the rectangular plate 1, there is no problem in placing concrete.

(8) After the concrete has solidified, removing unnecessary molds, supports 38, etc., including the flooring mold 24, construction of the structure including the concrete floor 23 of the next floor F ₁ It is completed (FIG. 14 (f), FIG. 11).

In addition, as in the second embodiment, since the inserts 6 and 6 of the mounting brackets 5 and 5 are embedded in the concrete, the steel frame steps 20A and 20B are fixed to the structure through the mounting brackets 5. . In addition, the mounting bracket 5 is left as a mold and the bottom end of the concrete floor 23 is reinforced with the mounting bracket 5, so that this portion can be reinforced. In addition, the nail which protruded below from the said mounting bracket 5 is cut | disconnected by the conventional method.

(9) and above, the construction of the steel frame stairs is completed (FIGS. 11 and 9). Steel frame staircase 20C of the next layer is also similarly assembled (FIG. 10).

(10) another embodiment

In the above embodiment, after pouring the concrete of the interlayer landing (F _0-1 ), the steel staircase 20B was constructed, the construction of the steel staircase (20B), the construction of the middle stairway (F _0-1 ). It does not matter before or after placing a layer of concrete. Therefore, after constructing the intermediate floor (F _0-1 ) layer, the next step (F ₁ ), the steel stairs, the frame, etc., the concrete is placed in the order of the middle floor (F _0-1 ) layer and the next layer (F ₁ ). It is also possible to pour.

(Example 4)

An embodiment of the mounting bracket 5 of this invention is demonstrated based on FIGS. 15-17.

(1) The support plate 2 is extended by bending the lower end of the rectangular plate 1 having the same height as the thickness of the floor concrete to be constructed at right angles. On the surface of the rectangular plate 1, the surface on the side of the support plate 2 is made into the surface 1a, and the surface on the opposite side to the support plate 2 is made into the surface 1b (FIG. 17 (b)).

(2) On the upper surface of the support plate 2, the fixing bracket piece 3 (outer circumferential side) corresponding to the position of the see-through hole 18 of the slender purlins 17 and 17 of the steel frame stairs 20 to be used. Fix the fixing bracket piece 4 (center side). The fixing bracket pieces 3 and 4 correspond to the upper steel frame stairs 20 and the lower steel frame stairs 20, respectively, and are provided on both sides in the longitudinal direction of the support plate 2. Perspective holes 10 and 10 are drilled in the fixing bracket pieces 3 and 4 in correspondence with the position of the see-through hole 18 of the narrow purlins 17 and 17 of the steel staircase 20 (Fig. 17 (a) (c), FIG. 18).

The openings 51 and 54 are formed in the rectangular plate 1 in correspondence with the positions of the fixing tool pieces 3 and 4. The openings 51 and 54 are formed in the shape and size which can insert the joining end part (sight hole 18 side) of the narrow purlin 17. As shown in FIG. One opening 51 is formed in correspondence with the fixing bracket piece 3 on the outer circumference side, and one opening 54 is formed in correspondence with both of the fixing brackets 4 and 4 on the center side ( 15 (a) (b)).

For joining the longitudinal edge 52 of the rectangular plate 1 facing the opening 51 and the abutting surface 53 of the narrow purlin of the fastener piece 3 with the steel staircase 20. Are formed in the same plane in the vertical direction (Figs. 15 (a) and 16 (a)). Similarly, the longitudinal edge 55 of the rectangular plate 1 facing the opening 54 and the abutting surface 56 of the slender purlin of the fastener piece 4 are flush with the surface in the vertical direction. 15 (a) (b) and 16 (b).

On the upper surface of the support plate 2, the plane "C" shaped enclosure 60 surrounding the fixing tool piece 3 and the opening 51 is fixed, and the edge 60b of the opening side of the enclosure 60 is open. ) Is fixed to the surface 1a of the rectangular plate 1. In addition, the upper surface of the support plate 2 is fixed with a plane "c" shaped enclosure 64 surrounding the fixing tool pieces 4 and 4 and the opening 54, and the opening side of the enclosure 64 is fixed. The end edge 64b is fixed to the surface 1a of the rectangular plate 1. The envelope 60 is composed of side plates 61 and 61 fixed at right angles to the rectangular plate 1, and a back plate 62 connecting the both side plates 61 and 61 in parallel with the rectangular plate 1. (FIG. 16 (a)). Similarly, the enclosure 64 is a back plate 66 connecting the two side plates 65 and 65 in parallel with the side plates 65 and 65 and the rectangular plate 1 fixed to the rectangular plate 1 at right angles, respectively. ) (FIG. 16 (b)).

Here, the upper edges 60a and 64a of the enclosures 60 and 64 and the upper edge 1c of the rectangular plate 1 are formed at the same height (FIG. 17 (a)-(c)). In addition, the side plates 61 on the outside of the enclosures 60 and 60 and the end edges on the outside of the support plate 2 and the rectangular plate 1 are formed in the same plane (Fig. 16 (a) (b)).

In addition, the back plates 62 and 66 of the enclosures 60 and 64 and the free ends 58 of the support plates 2 are provided with a predetermined interval (length L ₁ ) 68, and the support plates 2 are provided. ) Is exposed (Fig. 16 (a) (b)).

(3) On the surface 1a of the rectangular plate 1, the insert 6 which consists of bolts protrudes substantially horizontally in the position which approached the fastener piece 3,4. Moreover, the inserts 6 and 6 which are suitable in a different position protrude from the surface 1a of the rectangular plate 1.

In addition, between the surface 1a of the rectangular plate 1 and the upper surface of the support plate 2, a rib 16 for temporarily holding the angle of the rectangular plate 1 and the support plate 2 is temporarily fixed (FIG. 15). (c), Figure 17 (b)). Notches 16a are formed in the ribs 16 so that concrete flows (Fig. 17 (b)).

In addition, on the upper surface of the support plate 1, the screw portions (bolts facing the shafts) 69 and 69 are erected and fixed to a portion surrounded by the enclosure 64 (Figs. 16 (b) and 17 (c), 15 (a) (b)). The threads 69 and 69 are used to attach the closing plate 70 to close the opening 54.

In addition, nail holes 8 and 8 for fixing the floor mold 24 and the support plate 2 are provided in the support plate 2 at appropriate intervals (Fig. 15 (a)). As described above, the mounting bracket 5 is constituted (FIG. 15 (a) (b) (c)).

(4) In addition, in the above embodiment, the fixing bracket pieces 3 and 4 fixed one side to the upper surface of the support plate 2, and the other side was fixed to the surface 1a of the rectangular plate 1. You may. In addition, the fixing tool pieces 3 and 4 can be arrange | positioned at the same position, and can be fixed only to the surface 1a of the rectangular plate 1 (not shown either).

(Example 5)

An embodiment of the method of constructing the stairs of the present invention will be described with reference to FIGS. 18 to 23 and 14. The attachment bracket 5 of Example 4 is applied to the construction method of Example 3, and it is an Example built in the field using the intermediate | middle floor participant reinforced concrete.

[Configuration of Steel Stairs]

Both ends of the scaffolds 19 and 19 are stepped into a step shape and fixed with thin steel purlins 17 and 17 to form a steel staircase 20. Perspective holes 18 and 18 are drilled and provided in the part which is fixed to the floor structure (fixing bracket pieces 3 and 4 of the mounting bracket 5) of the thin purlin 17. As shown in FIG. Moreover, in the position near the sight hole 18, the front plate 75 which can abut on the rectangular plate 1 of the mounting bracket 5 is temporarily fixed between the narrow purlins 17 and 17. FIG. . Further, the scaffold 19 is formed by molding a mortar-based material.

The steel stair step 20 forms a half-layer and combines two steel stair steps 20 and 20 to form a step for one floor.

In addition, one side 5a of the mounting bracket 5 is fixed to the upper end of the slender purlins 17 of the steel staircases 20A and 20B prior to being brought into the construction site or after being brought into the construction site. . That is, the see-through hole 18 side of the narrow purlins 17 and 17 is inserted into the openings 51 and 54 of the mounting bracket 5, and the see-through hole 10 of the fixing bracket pieces 3 and 4 The bolt 11 is inserted into the see-through hole 18 of the thin purlin 17, and is screwed and fastened with the nut 12 (FIGS. 18 and 19). At this time, the steel frame stairs 20B are fixed to one side 5a of the mounting bracket 5, and the steel frame stairs are not provided on the other side 5b (see FIG. 4 and the like).

[How to build]

(1) In the reference layer (base layer) F ₀ , a concrete floor 23 is constructed in a state where the steel staircase 20 facing downward is fixed to one side 5a of the mounting bracket 5. (FIG. 14 (a), FIG. 18, FIG. 21).

(2) The frame and the reinforcing bar, including the frame 29 for the landing, for constructing the intermediate landing layer F _0-1 (intermediate layer between F ₀ and F ₁ ) to be constructed, are constructed by a conventional method. At this time, for example, the flooring mold 24 is supported by the supports 38 and 38 through the wooden beams 73 and 74 arranged horizontally (see Fig. 23).

In addition, parallel to the frame 29 and the reinforcement of the reinforcing bar, or after the construction, the steel frame stairs 20A on one side facing the F _0-1 floor to be constructed are arranged (Fig. 14 (a), Fig. 19, Fig. 20). One side 5a of the mounting bracket 5 is fixed to the upper end (connection portion with the next layer) of the steel frame staircase 20B on the other side.

(3) In the same manner as in the second embodiment, the lower end portion of the slender purlin 17 of the steel staircase 20A is fixed to the fixing bracket pieces 3 and 4 of the mounting bracket 5 of the reference layer F ₀ (existing). to, at the same time as bolt 11, nut 12 is inserted through the sight hole (10,18), the landing floor of the building a mounting bracket (5) of steel stairs (20A) going to (F _0-1) The nail is mounted on the mold 29 of the support plate 2, and nails are nailed through the nail holes 8 and 8 of the support plate 2 to fix the mounting bracket 5 and the floor mold 24 (FIG. 14 (b)). At this time, the fitting bracket 5 (steel staircase 20A) can be easily positioned at the correct position only by matching the position of the upper surface of the mold 29 to the streak position.

(4) Next, on the mold including the mold 29, concrete is poured to construct the intermediate floor landing 28 (FIG. 14 (c)). Also, at this time, the steel frame stairs 20B directed to the upper layer are not joined to the other side 5b of the mounting bracket 5 of the F _0-1 layer, but the rectangular plates 1 and the enclosures 60 and 64 are not joined. Since it is closed by the concrete, there is no fear of concrete leaking even if the concrete is poured.

In addition, in this embodiment, since the intermediate landing 28 is also made of cast-in-place concrete, only support for supporting the steel frame stairs 20A and 20B can be made unnecessary by the mold for constructing the structure.

(5) After pouring the concrete of the intermediate layer (F _0-1 ) layer, the steel staircase 20B having one side 5a of the mounting bracket 5 fixed to the upper end (connection portion with the next layer). It arrange | positions (refer FIG. 14 (c), FIG. 22).

(6) The lower end of the steel stair step 20B of the other side to the fixing bracket pieces 3 and 4 of the other side 5b of the attachment bracket 5 of the middle stairway (F _0-1 ) layer of the steel stair step 20A. Similarly, while fixing the bolts 11 and nuts 12 through which the see-through holes 10 and 18 are inserted, the mounting bracket 5 of the steel staircase 20B is formed on the floor of the planned layer F ₁ . It is mounted on the mold 24 of the dragon, nails are nailed through the nail holes 8 and 8 of the support plate 2, and the attachment bracket 5 and the floor mold 24 are fixed (Fig. 14 (d)). . At this time, for example, the flooring mold 24 is supported by the supports 38 and 38 through the wood beam members 73 and 74 arranged horizontally (see Fig. 23).

(7) Next, concrete is poured on the mold including the floor mold 24 (FIG. 14 (e)). At this time, using the upper edge 1c of the rectangular plate 1 of the mounting bracket 5 and the upper edges 60a and 64a of the enclosures 60 and 64 as measuring instruments, the upper surface 23a of concrete which has not yet been hardened ) Can be flattened. In addition, although the steel staircase 20C heading to the upper layer is not joined to the other side 5b of the mounting bracket 5, even if the concrete is poured by closing with the rectangular plate 1 and the sieves 60 and 64, There is no fear of smelting (see FIG. 23).

(8) If concrete removes unnecessary molds, supports 38, etc., including floor molds 24 after solidification, construction of constructs including concrete floors 23 of the next floor (F ₁ ) It is completed (FIG. 14 (f), FIG. 22, FIG. 23).

In addition, the inserts 6 and 6 of the mounting brackets 5 and 5 are fixed in concrete in the same manner as in the second embodiment. In addition, since the mounting bracket 5 is left as a compaction mold, since the lower end of the concrete floor 23 is reinforced with the mounting bracket 5, this portion can be reinforced. In addition, the nail which protruded below from the said mounting bracket 5 is cut | disconnected by the conventional method.

(9) In addition, the closing plate 70 is arranged in the opening 54 in the appropriate step (it may be after the narrow purlin 17 of the steel staircase is fixed to the fixed metal fittings 3 and 4). The screw holes 69 and 69 are inserted into the see-through holes 72 and 72 of the 71, and the nut is screwed into this, and the closing plate 70 is fixed to the mounting bracket 5. Subsequently, concrete (mortar) is filled in the enclosures 60 and 64, and the junction part of the fastening tool piece 3 and 4 and the thin purlin 17 is embedded in concrete. At this time, on the side of the enclosure 60, the front plate (temporarily fixed between the slender purlins 17 and 17) 75 of the steel staircase 20 closes the opening 51 to form the enclosure 64. On the side), since the closing plate 70 closes the opening 54, there is no fear that the filled concrete will leak.

(10) and above, the construction of the steel frame stairs is completed (FIGS. 22 and 23). Steel frame staircase 20C of the next layer is similarly assembled. In addition, 23b in a figure is a floor completion surface.

(11) In the above, the fixing bracket pieces 3, 4 are fixed to the surface 1a of the rectangular plate 1 (toward the landing side), and compared with the case of Example 1 fixed to the surface 1b. If the steel staircase 20 is fixed to the fixed bracket pieces 3 and 4, the construction bracket 5 may be rotated toward the steel stairway during the construction (until pour concrete and solidify the concrete). By preventing, the steel staircase 20 can be maintained more stably. In addition, since the joints of the fixing bracket pieces 3 and 4 or the thin purlin 17 and the fixed bolts and nuts are buried in concrete, the joints are not exposed after completion, and in particular, the appearance from the back side of the stairs. This is an excellent design. Furthermore, the joining work of the fasteners 3 and 4 and the thin purlin 17 can be performed at the step landing side (floor mold 24 side), and furthermore, the work is directed downward, thus facilitating the joining work. do. In addition, an opening for joining work is also unnecessary on the steel frame step 20 side.

(12) Other Examples

In the above embodiment, in the same manner as in Example 3, after pouring the concrete of the intermediate layer (F _0-1 ) layer, the steel frame stairs 20B was constructed, the construction of the steel frame stairs 20B, It does not matter before or after placing concrete in the middle layer (F _0-1 ) layer. Therefore, after constructing the intermediate floor (F _0-1 ) layer, the next step (F ₁ ), the steel stairs, the frame, etc., the concrete is placed in the order of the middle floor (F _0-1 ) layer and the next layer (F ₁ ). It can also be poured.

In addition, in the above embodiment, the intermediate landing was used as the concrete structure of the cast in place, and as in the second embodiment (FIG. 13), it may be formed by the already made steel (not shown).

In the present invention, since the mounting bracket can be fixed to the end of the steel frame step and the mounting bracket can be used for a part of the mold, it becomes a kind of disposable mold, and the configuration of the mold can be easily maintained while maintaining the dimensional accuracy easily. In addition, there is an effect that can reduce the effort of dismantling the mold.

In addition, in the mounting bracket of the present invention, since the rectangular plate is formed at almost the same height as the thickness of the floor concrete to be placed, the upper edge of the rectangular plate is used as a measuring device, which makes it easy to perform uniform work of concrete easily. have.

In addition, in the present invention, since the steel staircase can be attached using the mounting brackets constituting a part of the flooring frame, the steel staircase is composed of only the scaffolding portion, and the floor of the stair connection part (prow landing, middle landing) ) Can be easily constructed with steel frame staircase. Therefore, the footrest part can be constructed by separating the floor (prow landing and middle landing) of the step connection part which had to be designed and produced by order-made according to the position of a pillar and a beam. Therefore, the steel staircase consisting of only the scaffolding part can be designed only under the conditions of the step height and the width of the staircase, so that the steel staircase can be designed and produced by the ready-made, so that the steel staircase can be ordered through the Internet as in the ordinary products. The effect can be handled as a sale.

Claims (6)

At least one of the rectangular plate and the support plate is formed by inserting a support plate in a direction perpendicular to the lower end of the rectangular plate having the same height as the thickness of the floor concrete to be constructed, and attaching the insert plate to at least one of the rectangular plate and the support plate. At the same time, the mounting bracket of the steel staircase characterized in that the steel stair attachment means formed.       2. The steel bracket stair attachment tool according to claim 1, wherein the insert attaching means is a bolt hole, and the steel stair attaching means is a fixing bracket piece that can be fixed with a thin purlin of the steel stair step. On both sides of the rectangular plate, one side on which the support plate is raised is made the floor concrete attaching side, and the other side is the step attaching side, On the support plate, a fixing bracket piece for protruding and fixing the thin purlin of the steel stairway is provided to constitute a steel stair attachment means, An opening bracket is formed in the rectangular plate at a position corresponding to the fixing bracket piece, and a support frame surrounding the opening and the fixing bracket piece is fixed to the support plate. The steel stair staircase is fixed to the end of the steel staircase, and at the same time, the steel staircase mounting bracket is installed at the end of the concrete floor, and the insert fixed to the steel stairway stairway bracket is embedded in the concrete floor. Attachment device. (1) arranging the steel staircase in which the steel stair attachment bracket with the insert is fixed to the upper end at the step construction position; (2) fixing the lower end of the steel staircase to the floor of the existing floor, and fixing the steel stairway attachment bracket to the flooring frame of the floor to be constructed, as part of the flooring frame; (3) The method of attaching steel stairway comprising the steps of placing concrete on the floor to be built, embedding the insert of the steel stairway attachment bracket, and forming a concrete floor on the floor to be built. (1) arranging the first steel staircase of a half-layer, in which one side of the steel staircase mounting bracket with an insert is fixed to the upper end at the step construction position; (2) fixing the lower end of the first steel staircase to the floor of the existing layer, and fixing the steel stair attachment bracket to the middle landing frame for the intermediate landing of the planned construction, and making it part of the middle landing frame; Wow, (3) After placing the concrete in the middle tier, place the second steel staircase for the half-layer, in which one side of the steel stair attachment bracket with the insert is fixed to the upper end at the stair construction position; Before placing the concrete in the middle tier, at the stair-building position, a second steel stair for half a layer, in which one side of the steel stair attachment bracket with the insert is fixed to the upper end, and then the concrete in the middle tier is poured. To do that, (4) While fixing the lower end of the second steel stair step to the other side of the steel stair attachment bracket on the intermediate landing frame, the steel stair attachment bracket of the second steel stair step to the floor mold of the floor to be constructed Fixing it to be part of this flooring mold, (5) The method of attaching steel stairway, comprising the step of placing concrete on the floor to be built, embedding the insert of the steel stairway mounting bracket, and forming a concrete floor on the floor to be built.

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