JP2010106637A - Staircase - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a staircase capable of securing the degree of freedom of a design plan while being capable of easily conducting assembling construction. <P>SOLUTION: The staircase 21 is built by alternately assembling a plurality of staircase units 23 and a plurality of landing units 22. The staircase units 23 are assembled to disposals at a right angle with respect to other staircase units 23 adjacent to the upper and lower parts of the staircase units 23. The staircase units 23 are composed of pairs of bridgeboard plates 51 arranged in parallel and treads 52 mounted to a plurality of steps for the bridgeboard plates 51. The landing units 22 are composed of four supports 24 and landing floor framings 25 supporting their own four corners by these supports 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a staircase that can be assembled, for example, as an evacuation staircase for a building.

Conventionally, as this kind of staircase, for example, the configuration of Patent Document 1 has been proposed. As shown in FIG. 19, the outdoor staircase having the conventional configuration includes a stair frame 81, a lower stair part 82, an upper stair part 83, and a pair of landing floors 84. The staircase frame 81 is composed of four columns 81a, a top staircase support beam 81b, a central staircase support beam 81c, a lower staircase beam 81d, and an upper staircase beam 81e.
JP 2004-353251 A

  In the outdoor staircase having the conventional configuration disclosed in Patent Document 1, the lower staircase part 82 and the upper staircase part 83 are arranged so as to extend in parallel in a plan view, and the lower landing floor 84 and the upper landing floor 84 are disposed below. It is arranged outside the side stair part 82 and the upper stair part 83 in a protruding state. Therefore, this outdoor staircase has a rectangular shape as shown in FIG. That is, in the outdoor staircase of the conventional configuration of Patent Document 1, the pair of landing floors 84, the upper-end stair support beam 81b, the central stair support beam 81c, and the like have twice the width of the lower stair part 82 and the upper stair part 83. Have. For this reason, in this outdoor staircase, the layout of FIG. 19 in which the lower staircase part 82 and the upper staircase part 83 are arranged in parallel has to be selected. Therefore, when installing this outdoor staircase in the corner of the building B, for example, there is a problem that a rectangular installation space is required, the accommodation with respect to the building B is poor, and it is difficult to secure the freedom of the design plan. . Moreover, in this outdoor staircase, each beam 81b-81e is supported by the four support | pillar 81a, and the stair part 83 and the landing floor 84 are assembled to each beam 81b-81e. Therefore, in the state before the assembly, each beam 81b to 81e and the four columns 81a, the stair part 83, and the landing floor 84 are separate members. It took time and effort.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose is to provide a stair that can ensure the degree of freedom of the design plan and can be easily assembled at the installation site.

  In order to achieve the above object, the present invention is characterized by assembling a stair unit having a plurality of footboards and a landing unit that supports a landing floor set on a column.

  Therefore, in the present invention, at the installation site, the staircase can be constructed by assembling the staircase unit and the landing unit, so that the assembly is easy and the workability can be improved. Moreover, the stairs can be configured by freely combining the stair unit and the landing unit. Therefore, the layout of the stairs can be set freely, and the degree of freedom of the design plan can be secured.

  In the above configuration, it is preferable to assemble the stair unit and the landing unit alternately so that the stair unit is disposed at right angles to the other stair units adjacent to the top and bottom.

  In this way, in the present invention, for example, when the staircase is installed adjacent to the outdoor side of the corner portion of the building, it is installed in a substantially square shape without requiring a large rectangular installation space. It can fit in the space and can be installed well. Moreover, the degree of freedom of the floor plan of the building is improved, and as a result, the degree of freedom of the design plan is improved.

Moreover, the said structure WHEREIN: The said staircase unit is good to comprise from a pair of sacrificial board arrange | positioned in parallel, and the foot board attached on the several step part of the said sacrificial board.
When configured in this way, a stair unit composed of a rust plate and a plurality of footboards can be manufactured in advance at the factory, and can be easily assembled with a landing unit at the installation site.

  Furthermore, the said structure WHEREIN: The said landing unit is good to comprise with four support | pillars and the landing floor set by which the four corners were supported by these support | pillars. When configured in this manner, a landing unit composed of four struts and a landing floor set can be manufactured in advance in the factory and can be easily assembled with the stair unit at the installation site.

  As described above, according to the present invention, it is possible to easily perform assembly work at the installation site and to improve the degree of freedom of the design plan.

Below, one Embodiment of this invention is described based on FIGS.
As shown in FIGS. 1-4, the staircase 21 of this embodiment is a plane square in the outdoor side of the corner of the building B by assembling a plurality of landing units 22 and a plurality of staircase units 23 alternately. It is built to make. In this case, each stair unit 23 is assembled so as to be arranged at right angles with the landing unit 22 between the other stair unit 23 adjacent to the upper and lower sides.

  That is, at the installation position of the stairs 21, the four landing units 22 are arranged so as to be positioned at the four corners on the diagonal line with a space between each other. Furthermore, another landing unit 22 is stacked on each landing unit 22. And, except for the lowest floor and the top floor, four sets of landing units 22 and four sets of staircase units 23 that connect the landing units 22 are used for each floor. And as shown in FIG. 2, the position of the landing floor set 25 of each landing stage unit 22 is arrange | positioned so that it may become high in order clockwise. As shown in FIGS. 3 and 4, the landing unit 22 is not provided at the position corresponding to the evacuation exit (entrance / exit) Ba on the lowest floor, and only four short auxiliary columns 26 are erected. Yes. Therefore, there are three pairs of landing units 22 on the lowest floor. As can be seen from FIG. 6, at the position corresponding to the top floor, three sets of landing units 22 and two sets of staircase units 23 are provided. And, as will be understood from the following description, in this embodiment, it is pre-manufactured by welding and bolting at the factory, and at the construction site, these pre-manufactured members are bolted without using welding. The stairs are assembled by tightening.

  As shown in FIGS. 1 to 4, the landing unit 22 is made of a steel material having an L-shaped cross section, that is, an angle material, and has four struts 24 with the corner portions facing inward, and upper ends of the struts 24. It is composed of a steel landing floor set 25 having a flat square shape with four corners fixedly supported in the vicinity of the part. And in the landing unit 22 of each floor except the landing unit 22 of the lowest floor, the length of the support | pillar 24 is substantially equal to the space | interval from the floor surface of the floor of the building B which attaches stairs to the floor of the upper floor. It is formed to become.

  On the other hand, in the landing unit 22 installed in the part corresponding to the first floor and the top floor as the lowest floor of the building B, as shown in FIG. The auxiliary struts 26 are added or the ends of the struts 24 are cut so that the length of the struts 24 can correspond to the height position of the landing floor set 25.

  And among the four landing units 22 for each floor, the landing floor set 25 of one landing unit 22 is arranged at the same height as the floors of the second and higher floors of the building B, and each floor of the building B It is possible to evacuate through the landing floor set 25 from the evacuation exit Ba. Moreover, as shown in FIG. 3, from the lowest part of the stairs 21 and the escape floor Ba on the first floor of the building B, it is possible to evacuate to the outside from the exit 27 through the struts 24 of the landing unit 22. Yes.

  As shown in FIGS. 1-3, the handrail 28 is attached with the volt | bolt (not shown) between the support | pillars 24 arrange | positioned adjacently inside in the four landing units 22. The handrail 28 is arranged so as to extend while being inclined along the inclination of the stair unit 23 along the inner peripheral side of each stair unit 23 between the landing units 22. In the drawings (FIG. 2 etc.), the handrail 28 is made of a plate material, but a handrail made of a pipe material may be used. In the case of such a configuration, the handrail 28 is installed by welding a plate material to both ends of the pipe material, welding another plate material to the support column 24, and fixing those plate materials with bolts.

  As shown in FIGS. 1, 4, and 6, in the plurality of landing units 22, the struts 24 of the landing unit 22 disposed adjacent to the main body of the building B protrude from the wall surface of the building B. The connection fitting 29 is connected and fixed to be reinforced.

  As shown in FIG.5 and FIG.6, in the part corresponding to the rooftop floor Bb of the building B, between the landing floor group 25 of the top landing unit 22 and the rooftop floor Bb of the building B, the said landing Instead of the stair unit 23 between the units 22, a roof stair unit 30 having a space for two sets of the stair unit 23 is installed. Handrails 31 are provided at the upper part on both sides of the roof staircase unit 30. And, it can pass through this roof stair unit 30 and can escape to the roof floor Bb side of the building B beyond the parapet Bp.

  As shown in FIG. 7, side walls 32 are attached between the columns 24 by bolts (not shown) so as to be located on both sides of the landing unit 22 and the stair unit 23. These side walls 32 cover the outside of the side portions of the landing floor set 25 of each stair unit 23 and each landing unit 22. In addition, this side wall 32 is suitably provided in a required location.

The metal parts such as the landing unit 22, the stair unit 23, and the handrail 31 are rust-proofed or rust-proofed.
Next, the configuration of the landing unit 22 will be described in detail. As shown in FIGS. 8 to 10, the landing unit 22 is manufactured by fixing a landing floor set 25 between four struts 24 by welding or tapping screws 41 in a manufacturing factory. 9 and 10, reference numeral 48 indicates a welded portion. The landing floor set 25 includes a plurality of steel first reinforcing members 35A and 35B, a plurality of steel second reinforcing members 36, and a plurality of steel plate floor plates 37. The first reinforcing members 35A and 35B are fixed by welding so as to cross each other between the four struts 24 located on the diagonal lines. Each second reinforcing member 36 is fixed by welding so as to be installed between the adjacent first reinforcing members 35A and 35B. Each floor board 37 has a planar triangular shape, and is fixedly supported by tapping screws 41 on the upper surfaces of both the reinforcing members 35A, 35B, and 36 via mounting brackets 38A to 38E.

  That is, as shown in FIGS. 9 and 11, a plurality of mounting brackets 38 having a substantially L-shaped cross section are provided on both side surfaces of the reinforcing members 35A, 35B, 36 in the landing floor set 25. 39 and a nut 40. A plurality of mounting holes 38a are formed in the upper wall of each mounting bracket 38A to 38E at intervals in the extending direction of the reinforcing members 35A, 35B, 36. Then, as shown in FIG. 9, in the manufacturing factory, the two floor plates 37 are reinforced with the reinforcing members 35 </ b> A, 35 </ b> B, 36 by screwing a plurality of tapping screws 41 into the mounting holes 38 a of the mounting bracket 38 from above the floor plate 37. It is fixed on the top. Further, the remaining two floor boards 37 are reinforced by the plurality of tapping screws 41 in the same manner as described above after the stair unit 23 is assembled to the landing unit 22 at the installation site of the stair 21. Fixed on top.

  As shown in FIGS. 8 to 10, in the landing floor set 25 of the landing unit 22, a pair of steel plates is provided at a position between each pair of adjacent struts 24 on the side where the floor plate 37 is attached at the installation site of the stairs 21. The brackets 42 made of metal are welded and fixed to the first reinforcing members 35A and 35B with a space therebetween. And the landing stage unit 22 and the staircase unit 23 are assembled by fixing the upper end attachment part 51b and the lower end attachment part 51c of the sheathing board 51 of the staircase unit 23 mentioned later with respect to these brackets 42. As shown in FIG.

  As shown in FIGS. 8 to 10, an auxiliary reinforcing member 43 made of steel that is paired up and down is installed and fixed by welding at a position between each pair of adjacent columns 24 on the side where the bracket 42 is not provided. Has been.

  As shown in FIG. 1 to FIG. 4, in a state where the stair unit 23 is assembled between the landing units 22, a pair of steel materials is vertically paired between the struts 24 adjacent to the outside between the landing units 22. The connecting member 44 is constructed and fixed by bolts. That is, as shown in FIG. 9, the bracket 48 is fixed to the support column 24 by welding in the manufacturing factory, and both ends of the connecting member 44 are fixed to the bracket 48 by the bolts 49. The landing members 22 arranged adjacent to each other are connected and fixed by the connecting member 44 so as not to cause relative movement between them.

  As shown in FIGS. 4, 6, 12, and 13, there is a pair of struts 24 of the landing unit 22 in the stacked state, and between the struts 24 and the auxiliary struts 26 of the landing unit 22 in the added state. They are connected and fixed by a fixing bracket 45. That is, a pair of inner and outer fixing metal fittings 45 are joined and arranged at the connecting portion between the support posts 24 having a substantially L-shaped cross section and the connecting portion between the support posts 24 and the auxiliary support posts 26, and a plurality of bolts 46 and nuts. 47 is fixed. The fixing bracket 45 fixes the connecting portion between the support columns 24 and the connecting portion between the support columns 24 and the auxiliary support columns 26 so as not to be displaced.

  Next, the configuration of the stair unit 23 will be described in detail. As shown in FIGS. 14 and 15, the staircase unit 23 is composed of a pair of steel plate plate 51 arranged in parallel and a plurality of steel plate plates 52 laid between the plate plates 51. ing. A plurality of step portions 51 a for supporting the tread plate 52 are formed on the upper end surface of each of the sheathing plates 51. Each tread plate 52 is formed in a substantially L-shaped cross section so as to have a tread plate main body portion 52a extending substantially horizontally and a kick-up plate portion 52b standing vertically upward from the rear end edge of the tread plate main body portion 52a. Yes. A bent portion 52c is formed on the front end edge of the tread plate main body portion 52a downward.

  Then, as shown in FIG. 14, a plurality of step plates 52 are welded and fixed to the two plate plates 51 in a state where the plurality of step plates 52 are arranged on the respective step portions 51 a of the pair of plate plates 51. A unit 23 is formed. In this case, the both slats 51 are positioned inside the both ends of the tread 52 so that both ends of each tread 52 protrude from the slats 51 to both sides. For this reason, it is comprised so that the sacrificial board 51 may not be exposed to the both sides | surfaces of the stair unit 23. FIG.

  As shown in FIGS. 14 and 15, upper and lower end mounting portions 51 b and a lower end mounting portion 51 c are formed to project from the upper and lower end portions of each sheathing plate 51. Then, as shown in FIGS. 2 and 9, the upper end mounting portion 51 b and the lower end mounting portion 51 c of the sheathing plate 51 are fixed to the bracket 42 of the landing floor set 25 in the landing unit 22 by bolts 53 and nuts 54. The stair unit 23 is assembled between the landing floor groups 25 of the adjacent landing unit 22.

  As shown in FIGS. 4 and 16, between the lower ends of adjacent struts 24 installed on the portion corresponding to the first floor of the building B, or between the lower ends of adjacent auxiliary struts 26 joined to the struts 24. A first fixing plate 58 made of a steel plate is welded and fixed in a manufacturing factory. In addition, a second fixing plate 59 made of steel plate is welded and fixed at the manufacturing factory between the lower end mounting portions 51c of the sacrificial plate 51 in the lowermost stair unit 23 arranged in the portion corresponding to the first floor of the building B. ing.

  Then, a plurality of nuts 62 are screwed into the first bolts 61 in a state where the holes of the first fixing plate 58 are inserted into the pair of first bolts 61 embedded in the foundation concrete 60 at the installation site. Thus, the lower ends of the columns 24 or the auxiliary columns 26 in each landing unit 22 are fixed to the foundation concrete 60. In addition, in a state where the second fixing plate 59 hole is inserted through a pair of second bolts 63 embedded in the foundation concrete 60, a plurality of nuts 64 are screwed into the second bolts 63, so that the lowermost part The lower end portion of the sand plate 51 in the step unit 23 is fixed to the foundation concrete 60. A finishing concrete 65 is placed on the foundation concrete 60 so that the first and second fixing plates 58 and 59 are embedded.

  As shown in FIGS. 6 and 17, the rooftop staircase unit 30 includes a pair of first steel plate 67 made of steel plates arranged in parallel, and bolts 74 and nuts 75 in the first steel plate 67 at the manufacturing plant. A pair of second plate plates 68 made of steel plates, a plurality of step plates 69 welded and fixed to a plurality of step portions 67a, 68a on both plate plates 67, 68 at the manufacturing plant, and both plate plates 67, The top plate 70 is welded and fixed at the manufacturing plant across the upper end portion of 68. The 1st sacrificial board 67 is extendedly arranged so that it may rise and incline toward the building B side from the landing floor set 25 of the uppermost landing unit 22. The second sacrificial plate 68 extends from the upper end of the first sacrificial plate 67 so as to incline downward toward the roof floor Bb side of the building B.

  At the lower end of each of the first sacrificial plates 67, an attachment portion 67b for attaching to the bracket 42 of the landing floor set 25 in the uppermost landing unit 22 is formed. A fixing plate 71 is welded and fixed between the lower ends of the two second sacrificial plates 68 at the manufacturing plant. Then, in a state where the fixing plate 71 is inserted into a plurality of bolts 72 embedded in the floor of the rooftop floor Bb, a plurality of nuts 73 are screwed into the bolts 72, whereby the roof stair unit 30 The lower end portion of the second sash plate 68 is fixed to the floor of the rooftop floor Bb.

Next, the installation method of the staircase 21 configured as described above will be described.
As shown in FIG. 1, when the staircase 21 is constructed adjacent to the outdoor side of the corner portion of the building B, the required number of landing unit 22, staircase unit 23, including the landing floor set 25 in the manufacturing factory in advance. 30, auxiliary struts 26 and the like are manufactured. And as shown in FIG.3 and FIG.4, on the foundation concrete 60 of the part corresponding to the 1st floor of the building B, the landing stage unit 22 including the landing floor set 25 and the auxiliary column 26 are spaced apart from each other. In a state, it is erected so as to be positioned at four corners on the diagonal line. In this case, the struts 24 of the landing floor unit 22 on the first floor are processed in advance in the factory so that their lengths are in a plurality of stages.

  Further, as shown in FIGS. 4 and 16, a first fixing plate 58 is welded and fixed in advance between the lower ends of the struts 24 of each landing unit 22 or between the lower ends of the auxiliary struts 26 at the factory. Then, the holes of the first fixing plate 58 are inserted into the pair of first bolts 61 embedded in the foundation concrete 60, and the nuts 62 are screwed into the first bolts 61, whereby each landing unit 22 is inserted. The lower end of the support post 24 or the auxiliary support post 26 is fixed to the foundation concrete 60. In this state, as shown in FIG. 2, the positions of the landing floor groups 25 of the four landing unit 22 are arranged so as to increase in the clockwise direction. At the same time, as shown in FIG. 1, the landing floor set 25 of one landing unit 22 is arranged at a position corresponding to the second floor escape port Ba of the building B.

  Then, the stair unit 23 is assembled in order between the landing floor sets 25 of the four landing units 22. In this case, as shown in FIGS. 2 and 9, the upper end mounting portion 51 b and the lower end mounting portion 51 c of the sheathing plate 51 of each stair unit 23 are fixed to the bracket 42 of the landing floor set 25 by bolts 53 and nuts 54. Thus, the stair unit 23 can be assembled between the landing floor groups 25 of the adjacent landing unit 22. Further, when the stair unit 23 is assembled, as shown in FIG. 9, the two floor boards 37 in the landing floor set 25 are not mounted in the manufacturing factory, and the upper portion of the bracket 42 is opened. For this reason, the fixing work of the upper end mounting portion 51b and the lower end mounting portion 51c of the sheathing plate 51 and the bracket 42 can be easily performed from above the landing floor set 25.

  Further, as shown in FIGS. 4 and 16, the second fixing plate 59 is provided between the lower end mounting portions 51 c of the sacrificial plate 51 for the lowermost stair unit 23 arranged in the portion corresponding to the first floor of the building B. Are fixed by welding at the factory. Then, the holes of the second fixing plate 59 are inserted into a pair of second bolts 63 embedded in the foundation concrete 60, and a plurality of nuts 64 are screwed into the second bolts 63, so that The lower end portion of the sand plate 51 in the stair unit 23 is fixed to the foundation concrete 60. Thereafter, the finished concrete 65 is placed on the foundation concrete 60 so that the first and second fixing plates 58 and 59 are embedded.

  Then, after assembling the stair unit 23 with respect to the landing unit 22, the two unattached floor plates 37 are attached by the tapping screws 41 on the landing floor set 25 of each landing unit 22. Also, as shown in FIGS. 2 to 3, a pair of upper and lower connecting members 44 are fixed by bolts 49 (see FIG. 9) between the landing units 22 between the struts 24 that are adjacent to the outside. The landing stage units 22 are connected and fixed. Further, as shown in FIGS. 1 and 4, the struts 24 of the landing unit 22 arranged adjacent to the building B are connected and fixed to a connection fitting 29 projecting from the wall surface of the building B to prevent shaking.

In this way, the assembling work of the stairs 21 corresponding to the first floor of the building B, that is, the stairs 21 corresponding to the first floor to the second floor of the building B is completed.
Then, the step 21 corresponding to the second floor of the building B is assembled. In this case, the new landing unit 22 is stacked on the landing unit 22 or the column 24 erected on the portion corresponding to the first floor of the building B. And as shown in FIG.4, FIG12 and FIG.13, while arrange | positioning a pair of fixing bracket 45 across the connection part between the support | pillars 24 in the upper and lower landing stage unit 22 of a piled-up state, those fixing bracket 45 is attached. A plurality of bolts 46 and nuts 47 are used to fix the upper and lower columns 24. By fixing the support columns 24, the connecting portions between the support columns 24 in the upper and lower landing unit 22 are fixed so as not to be displaced. Note that the fixing bracket 45 is welded and fixed to the one support column 24 in advance at the manufacturing factory.

  After that, as in the assembly work in the portion corresponding to the first floor of the building B described above, for the landing stage unit 22 in the stacked state, assembling the stair unit 23, attaching the floor plate 37, fixing the connecting member 44 with bolts, If the connection and fixing with the connection fitting 29 are performed, the step 21 corresponding to the second floor of the building B can be assembled. Further, with respect to portions corresponding to a plurality of floors of the third floor or more of the building B, the stairs 21 corresponding to the required number of floors can be constructed by repeatedly performing the same work as the assembly work of the portions corresponding to the second floor. it can.

  As shown in FIGS. 5, 6, and 17, in the portion corresponding to the rooftop floor Bb of the building B, instead of the stair unit 23 between the landing unit 22, the landing of the uppermost landing unit 22 Between the floor set 25 and the roof floor Bb of the building B, a roof stair unit 30 is installed. And the attachment part 67b of the lower end of the 1st sacrificial board 67 in the staircase unit 30 for rooftops is attached to the bracket 42 of the landing floor set 25 in the uppermost landing stage unit 22. The fixing plate 71 is inserted into a plurality of bolts 72 embedded in the floor of the rooftop floor Bb, and nuts 73 are screwed into the bolts 72 so that the lower end portion of the second sheathing plate 68 is connected to the rooftop floor. Fix to the floor of Bb.

  Thereafter, as shown in FIG. 7, the side wall 32 is attached to a necessary portion between the adjacent columns 24. Furthermore, the handrail 31 is fixed between the adjacent support columns 24 on the inner peripheral side of the staircase 21 with bolts. The side walls 32 and the handrails 31 may be fixed sequentially as the landing unit 22 and the stair unit 23 are stacked.

  As described above, when the landing unit 22 is arranged at the four corner portions and the stair unit 23 is arranged at right angles to the other adjacent stair units 23, a planar square as shown in FIG. Stairs can be constructed.

  On the other hand, as shown in FIG. 18A, if the landing unit 22 and the stair unit 23 are arranged in a straight line, a straight stair can be constructed. Moreover, as shown in FIG.18 (b), if the landing unit 22 and the staircase unit 23 are each adjoined, the staircase which raises / lowers zigzag can be constructed. However, in this case, a gap having a width corresponding to two columns 24 is formed between adjacent landing units 22, and thus a plate material for closing the gap is required. Furthermore, as shown in FIGS. 18 (c) and 18 (d), if the landing unit 22 and the stair unit 23 are arranged to be bent in part, the ascending / descending direction is reversed 180 degrees or bent into a crank shape. You can construct staircases. That is, the staircase 21 with various layouts can be constructed by appropriately selecting the position of the bracket 42 provided on the landing unit 22 and connecting the staircase unit 23.

Therefore, according to this embodiment, the following effects can be obtained.
(1) In this staircase 21, the landing unit 22 is composed of four struts 24 and a landing floor set 25 whose four corners are supported by these struts 24. For this reason, the landing unit 22 including the four support columns 24 and the landing floor set 25 can be manufactured in advance in the factory. In addition, the stair units 23 and 30 include a pair of parallel plates 51, 67, and 68 arranged in parallel, and a step plate 52 that is mounted on the plurality of step portions 51a, 67a, and 68a of the vertical plates 51, 67, and 68. And is made up of. For this reason, the stair unit 23,30 which consists of the sacrificial board 51,67,68 and the some step board 52 can be manufactured previously in a factory. Moreover, if the landing unit 22 and the staircase units 23 and 30 are immersed in a rust-proof plating or rust-proof paint tank, it is possible to perform rust-proofing for each component in a short time. And in the installation site, if the landing unit 22 and the staircase units 23 and 30 are assembled, the staircase 21 can be constructed and the construction can be easily performed.

  (2) In the staircase 21 of this embodiment, by appropriately combining the staircase unit 23 and the landing unit 22, it is possible to construct staircases with various layouts and freely select a design plan.

  (3) In the staircase 21 of this embodiment, the welding for assembling the members is performed at the manufacturing factory, and the assembling at the construction site is performed by bolts so that the welding is not performed. Therefore, at the construction site, the staircase 21 can be easily constructed by bolting the parts produced in advance.

  (4) In the staircase 21 of this embodiment, the staircase units 23 and the landing unit 22 are alternately combined so that the staircase units 23 are arranged at right angles to the other staircase units 23 adjacent to the top and bottom thereof. If configured, a flat square stairs can be constructed. Therefore, when installing the staircase 21 in the corner part of the building B, etc., it can be installed with sufficient fit with respect to the building B in a square installation space. Therefore, it is possible to ensure the degree of freedom of the design plan.

  (5) In this staircase 21, both ends of each tread plate 52 of the stair unit 23 are configured to protrude from the sheathing plate 51 to both sides. Therefore, it can suppress that the sacrificial board 51 is exposed to the both sides of the stair unit 23, and can maintain an external appearance favorable.

  (6) In this staircase 21, angle members are used as the support columns 24 and the auxiliary support columns 26. For this reason, when the side wall 32 is provided, only the end surface which appears by the thickness of the support | pillar 24 and the auxiliary | assistant support | pillar 26 will be recognized between the side walls 32, and a favorable external appearance can be maintained.

  (7) In this staircase 21, the landing floor set 25 of the landing unit 22 is fixed between the struts 24 located on the diagonal lines, and intersects with each other, a plurality of first reinforcing members 35 (35A, 35B), and the first A plurality of second reinforcing members 36 laid between one reinforcing member 35A and 35B, and a floor plate 37 supported on the upper surfaces of both reinforcing members 35A, 35B and 36. For this reason, the landing floor set 25 can be formed firmly, and the strength of the landing floor set 25 and the staircase 21 as a whole can be increased.

  (8) In this staircase 21, auxiliary reinforcing members 43 are provided between adjacent struts 24 of the landing unit 22. For this reason, the adjacent struts 24 can be held in parallel by the auxiliary reinforcing member 43.

  (9) In this staircase 21, a pair of brackets 42 are provided on the landing floor set 25 so as to be positioned between a pair of adjacent struts 24 of the landing unit 22, and the bracket 42 has a sacrificial plate 51 of the staircase unit 23. It is comprised so that the edge part of may be fixed. Therefore, the stair unit 23 can be easily assembled to the landing unit 22 by fixing the end portion of the plate 51 of the stair unit 23 to the bracket 42 of the landing floor set 25.

  (10) In this staircase 21, a side wall 32 can be provided between adjacent struts 24. For this reason, the stair unit 23 and the landing unit 22 can be concealed, the appearance of the entire stair 21 can be kept good, and the fall of objects and the like outside the stair 21 can be prevented.

  (11) In this staircase 21, since the tread plates 52 and 69 of the stair unit 23 are bent so as to include the kick-up plate portions 52b and the like, the entire tread plates 52 and 69 form an angle. For this reason, the strength of the staircase unit 23 can be improved and the staircase 21 as a whole can be made sturdy.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
In the embodiment, the strut 24 of the landing unit 22 is made of steel material having a substantially L-shaped cross section, and the strut 24 is made of steel material having various shapes such as a square tube shape, a pipe shape, and a cross-section H shape. You may comprise by.

In the embodiment described above, a plate-like one is used as the side wall 32, but a lattice-like or net-like one may be used as the side wall 32.
-In the said embodiment, although the length adjustment of the support | pillar 24 is performed on the installation site of the staircase 21 about four landing stage units 22 standingly arranged in the part corresponding to the 1st floor of the building B, this length The adjustment work may be performed at the manufacturing factory of the landing unit 22.

  -In the said embodiment, although it is made to weld the 1st fixing board 58 with respect to the lower end part of the support | pillar 24 about the four landing units 22 standingly arranged in the part corresponding to the 1st floor of the building B, in a factory. This welding work may be performed at the construction site.

  -In the said embodiment, about the lowest staircase unit 23 corresponding to the 1st floor of the building B, it welds the 2nd fixed plate 59 with respect to the lower end part of the sacrificial board 51, but this welding The work may be performed at the construction site.

  In the above embodiment, the roof stair unit 30 installed on the roof floor Bb of the building B is welded to the lower end portion of the second sacrificial plate 68 by the fixing plate 71 at the factory. The work may be performed at the construction site.

-The kick-up plate portions of the tread plates 52 and 69 of the stair unit 23 may be eliminated.
(Another technical idea)
Furthermore, technical ideas other than the claims grasped by the above embodiment will be described.

  (A) The staircase according to claim 3, wherein both ends of the step board of the stair unit protrude from the sheathing plate to both sides. If comprised in this way, since a sacrificial board will be located behind the end part of a tread board, it can prevent that the sacrificial board is conspicuous, and can obtain a favorable external appearance.

  (B) The landing floor set of the landing unit includes a reinforcing member that is fixed between struts positioned diagonally and crosses each other, and a floor board supported on the upper surface of the reinforcing member. Item 4. The staircase according to item 4 or item (A). In this way, the strength of the landing floor set and the entire landing unit can be improved.

  (C) The staircase according to item (B), wherein an auxiliary reinforcing member is provided between adjacent struts of the landing unit. If it does in this way, the intensity | strength between support | pillars can be improved.

  (D) The landing floor set of the landing unit has a pair of brackets at a position between a pair of adjacent struts, and an end portion of the plate of the stair unit is fixed to the bracket. 3. The staircase according to any one of the technical ideas (A) to (C). In this way, the landing unit and the stair unit can be easily connected, and the plane shape of the entire stair can be freely selected by setting the position of the bracket appropriately.

  (E) The technique according to claim 3, wherein a side wall is provided between the columns of adjacent landing unit so as to cover the upper space of the stair unit and the upper space of the landing floor set of the landing unit. The staircase according to any one of items (A) to (D).

(F) The landing unit according to any one of claims 1 to 4 and the technical ideas (A) to (E).
(G) The staircase unit according to any one of claims 1 to 4 and the technical ideas (A) to (E).

  (H) The technical idea (F) or (E), wherein a member manufactured in advance by welding in a manufacturing factory is used and a member manufactured in advance at a construction site is fixed with a bolt. Stair unit as described in.

The principal part cross-sectional view which shows the staircase of one Embodiment in the cross section in the part corresponding to the several floors of a building. The principal part perspective view of the stairs of FIG. The principal part cross-sectional view which shows the same staircase in the cross section in the part corresponding to the 1st floor of a building. FIG. 4 is a partial cross-sectional view taken along line 4-4 of FIG. The principal part cross-sectional view which shows the stairs in the cross section in the part corresponding to the rooftop floor of a building. The fragmentary sectional view in the 6-6 line of FIG. The principal part perspective view which shows the state which attached the side wall between the support | pillars of an adjacent landing stage unit. The perspective view which expands and shows one landing stage unit. The top view which expands and shows the landing unit. The principal part cross-sectional view of the landing unit. The partial expanded sectional view in the 11-11 line of FIG. The partial side view which expands and shows the connection structure between the upper and lower support | pillars of the landing unit in FIG.4 and FIG.6. The expanded sectional view in the 13-13 line of FIG. The perspective view which expands and shows one staircase unit. The exploded perspective view of the stair unit. The fragmentary expanded sectional view in the 16-16 line | wire of FIG. The principal part expanded sectional view which shows the fixing structure of the staircase unit for rooftop floors shown in FIG. (A)-(d) is a simplified top view which shows various modifications. The principal part cross-sectional view which shows the conventional staircase.

Explanation of symbols

  21 ... Stairs, 22 ... Landing unit, 23 ... Stair unit, 24 ... Post, 25 ... Landing floor assembly, 30 ... Stair unit for rooftop, 32 ... Side wall, 35 ... First reinforcing member, 35A ... First reinforcing member, 35B ... 1st reinforcement member, 36 ... 2nd reinforcement member, 37 ... Floor board, 42 ... Bracket, 43 ... Auxiliary reinforcement member, 45 ... Fixing metal fitting, 51 ... Saddle plate, 51a ... Step part, 51b ... Upper end attachment part, 51c ... Lower end mounting portion, 52 ... tread plate, 52a ... tread plate body portion, 52b ... kick-up plate portion, B ... building.

Claims (4)

A staircase characterized by assembling a stair unit having a plurality of treads and a landing unit that supports a landing floor set on a column. The staircase according to claim 1, wherein the staircase unit and the landing unit are alternately assembled so that the staircase unit is arranged at right angles to the other staircase units adjacent above and below the staircase unit. 3. The staircase according to claim 1, wherein the stair unit includes a pair of parallel plate plates arranged in parallel and the step plate mounted on a plurality of step portions of the flat plate. 4. The staircase according to any one of claims 1 to 3, wherein the landing unit includes the four struts and the landing floor set having four corners supported by the struts.

Images