JP2007100496A - Stair device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stair device which enables sufficient strength to be obtained by a few kinds of members and is easily assembled in a short time and is suitable for an exposed structure. <P>SOLUTION: A pair of left and right block columns 11 are formed along a tilting direction by coupling an upper step coupling part 2b with a lower step coupling part 3b of a plurality of assembly blocks 1. A tread 13 is laid and fixed between tread support parts 2c of the assembly block 1 which correspond to each other in a left and right direction so as to assemble the stair device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stairway device for a straight portion or a rounded portion that is assembled using staircase components having the same shape and is suitable for an exposed structure in which a room is viewed widely.

Conventionally, there are, for example, Patent Document 1 and Patent Document 2 as stair devices assembled using stair parts having the same shape.
Patent Document 1 includes a three-step staircase assembly in which a horizontal plate is integrally provided on an upper side portion and a standing plate is integrally provided on a vertical side portion on a right-side triangular attachment reinforcing side plate. A side plate is mounted on the inner surface of a side wall plate and a tread is horizontally mounted between horizontal plates of left and right mounting reinforcement side plates.

Further, in Patent Document 2, a front mounting member and a rear mounting member that are connected to each other are fixed to a receiving beam, and three connected stair pieces are spanned between the left and right front mounting members and the rear mounting member. Is fixed.
JP-A-6-294192 (FIG. 1) Japanese Patent Laid-Open No. 10-88759 (FIG. 1)

In recent buildings, many staircases with an exposed structure that exposes the structural frame of the staircase are used in order to make the interior wide.
However, in the cited document 1, the weight of the entire staircase is supported by the side wall plate, and in the cited document 2, the weight of the entire staircase is supported by the receiving beam. Thus, a high-strength supporting member such as a side wall plate or a receiving beam that supports the weight of the entire staircase is required, and the stairway device is enlarged including these supporting members. In addition, a plurality of types of staircase parts are required, and the assembly work tends to be complicated, and each is not suitable for an exposed staircase.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a linear portion and a rounded portion staircase device suitable for an exposed structure, capable of obtaining sufficient strength, and that can be easily assembled with a small number of types of staircase components. To do.

  The stairway device according to claim 1, comprising: a plurality of block rows formed by connecting a plurality of assembly blocks along a tilt direction from a lower front portion to an upper rear portion; and an assembly block facing each other in the width direction in each block row. The upper block connection includes a step board to be connected, and each of the assembly blocks is formed in the same shape or substantially the same shape, and is connected and fixed to each assembly block with an adjacent upper assembly block via a fixture. And a lower plate connecting portion for connecting and fixing the adjacent lower assembly block via a fixture, and a footboard support portion for connecting and fixing the footboard.

  The stairway device according to claim 2 is the invention according to claim 1, wherein each assembly block is formed in a hollow shape having at least an upper side portion and a lower side portion, and an upper stage connecting portion is provided at a rear portion of the upper side portion of the assembly block. In addition to being provided, a tread board support portion is provided at the front portion, and a lower stage connecting portion is provided at the rear portion of the lower side portion.

  The stairway device according to claim 3 is the invention according to claim 1, wherein each assembly block is formed in a hollow shape having at least a front side portion and a rear side portion, and is connected to the upper portion of the rear side portion of the assembly block. And a lower connecting portion is formed below the front side.

  A stairway device according to a fourth aspect is the invention according to any one of the first to third aspects, wherein an inclined girder for supporting the assembly block from below is provided along each block row, and each of the assembly blocks has the inclination The support connection part to which a girder is connected is provided.

  The stairway device according to claim 5 is the invention according to claim 3 or 4, wherein each assembly block is formed by bending the upper and lower sides and the front and rear sides of the side plate so that the upper side, the lower side, the front side, and the rear side. Are formed in a rectangular shape when viewed from the side, and further provided with reinforcing ribs formed by bending inward on the respective side portions, and the side plate is provided with a plurality of or single inclined plate portions by punching portions. Is provided.

  The stairway device according to claim 6 is the invention according to claim 1 or 3, wherein the assembly block includes at least an outer plate portion, a front plate portion bent inward from a front side of the outer plate portion, and the outer plate. The cross-sectional shape in plan view having the rear plate portion bent inward from the rear side of the portion is formed of the same substantially channel-shaped mold material or the substantially rectangular tube-shaped mold material.

  The stairway device according to claim 7, wherein the inner peripheral side is formed by connecting a plurality of inner peripheral assembly blocks in an inclined direction from a lower front part to an upper rear part and in an arc shape centering on a vertical axis in plan view. A plurality of assembly block rows on the outer peripheral side formed by connecting a plurality of assembly blocks on the outer peripheral side from the lower front part to the upper rear part in an inclined direction and in an arc shape centering on the vertical axis in plan view; The inner peripheral assembly block row and the outer peripheral assembly block row are connected to each other in the width direction, and the outer peripheral assembly block and the inner peripheral block are the same. An upper connection part that is formed in a shape or substantially the same shape, and is connected and fixed to each assembly block with an adjacent upper assembly block via a fixture, and an adjacent lower assembly block is connected via a fixture. Connected and fixed And the step connection portion, in which a step board support portion for connecting and fixing step board is provided.

  The stairway device according to claim 8 is the invention according to claim 7, wherein the inner peripheral assembly block and the outer peripheral assembly block are bent inward from at least the outer plate portion and the front side of the outer plate portion. The cross-sectional shape in plan view having the front plate portion and the rear plate portion bent inward from the rear side of the outer plate portion is formed of the same substantially channel-shaped mold material or substantially square tube-shaped mold material. is there.

  The stairway device according to claim 9 is the invention according to claim 8, wherein each assembly block has an upper surface along a horizontal plane and a lower surface along an inclined direction, and a tread plate support portion is provided on the upper surface via a support plate. It is a thing.

  According to a tenth aspect of the present invention, in the invention according to the ninth aspect, the assembly block on the outer peripheral side is integrally formed by connecting a plurality of divided blocks divided in the depth direction.

  According to invention of Claim 1, it has the intensity | strength which can fully support the load concerning a staircase by connecting several assembly blocks of the same shape or substantially the same shape via an upper step connection part and a lower step connection part. By assembling multiple assembly block rows and connecting and fixing the treads between the tread plate support parts of the assembly blocks facing in the width direction in these block rows, it is possible to assemble easily and quickly with fewer types of staircase components. In addition, it is possible to provide a staircase device suitable for the exposed structure.

  According to invention of Claim 2, a block row | line | column can be easily assembled by connecting the upper side part front part and lower side part rear part of a hollow assembly block via a fixing tool. In addition, by connecting and fixing the connecting position of the front part of the upper side and the rear part of the lower part back and forth, it is possible to provide a stair device with a different gradient by changing the front and back width of the tread, and the design can be easily changed. Become.

  According to invention of Claim 3, a block row | line | column can be easily assembled by connecting the front side part upper part and rear side lower part of a hollow assembly block via a fixing tool. In addition, by connecting and fixing the connection position of the upper part of the front side part and the lower part of the rear side part up and down, it is possible to provide a stair device with different slopes by changing the height between the treads. It becomes easy.

  According to the fourth aspect of the present invention, the reinforcement girders can increase the strength of the block row, can effectively prevent deformation and twisting, and can improve the appearance of the stairway device necessary for the exposed structure. .

  According to the invention described in claim 5, the assembly block is manufactured by bending the periphery of the side plate to form four sides to form a box, and forming the reinforcing ribs along the edges of the sides. An assembly block that is easy, lightweight, and has sufficient strength can be easily manufactured, and the manufacturing cost can be greatly reduced. Further, by forming the inclined reinforcing portion on the side plate, the weight can be reduced and the aesthetics can be imparted without reducing the strength.

  According to the sixth aspect of the present invention, the assembly block is formed of a substantially channel-shaped or substantially rectangular tube-shaped mold material, so that it is easy and low-cost by simply cutting a long mold material in a predetermined direction at a predetermined position. A block can be formed, and a staircase device can be provided at low cost.

  According to the seventh aspect of the present invention, a plurality of outer peripheral assembly blocks having the same shape are connected to form an outer assembly block row along the spiral direction, and a plurality of inner peripheral blocks having the same shape are installed. Connect the assembly blocks to form an assembly block row on the inner circumference side along the spiral direction, and install the assembly block on the outer circumference side of the assembly block row on the outer circumference side and the assembly block on the inner circumference side of the assembly block row on the inner circumference side By attaching the footboard to the inner peripheral side assembly block, the outer peripheral side assembly block and the stepped parts with fewer types of footboards, the stairway device can be assembled easily and in a short time, and the R is suitable for the exposed structure. Some staircase devices can be provided.

  According to the eighth aspect of the present invention, the assembly block is formed as a substantially channel-shaped or substantially rectangular tube-shaped mold material, so that it is easy and low-cost by simply cutting a long mold material in a predetermined direction at a predetermined position. A block can be formed and the stairway device of the rounded portion can be provided at low cost.

  According to invention of Claim 9, an assembly block can be easily formed by cut | disconnecting a type | mold material with a predetermined length along a horizontal surface and an inclined surface. In addition, by fixing the treadboard support part to the upper surface of the assembly block via the support plate, sufficient mounting strength can be obtained, and further, the lower surface is formed along the inclined surface, which makes the staircase device excellent in aesthetics. .

  According to the invention of claim 10, the assembly block on the outer peripheral side having a long depth in the front-rear direction is integrally formed by connecting a plurality of divided blocks in the depth direction, thereby reducing the size and the strength of the parts. It is possible to reduce the labor required for carrying and assembling stair parts.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Embodiment 1]
A stairway device for a straight portion of an exposed structure according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 to 4, the stair device includes a plurality of (a pair of left and right in the figure) block rows 11 in which a plurality of assembly blocks 1, 1 </ b> A, 1 </ b> B are connected with an inclination from a lower front part to an upper rear part. An inclined girder 12 for connecting and supporting the assembly blocks 1, 1A and 1B of the block row 11 from below, and a tread 13 for connecting the assembly blocks 1, 1A and 1B facing each other in the width direction in the block row 11 It has.

  The assembly blocks 1 other than the lowermost stage and the uppermost stage are respectively formed in the same shape of a hollow box shape with a rectangular side view. In order to match the height and depth of each step, the bottom assembly block 1A is lower than the assembly block 1 by the thickness of the tread 13, and has a rectangular shape in a side view and a substantially hollow box shape. It is formed. Further, the uppermost assembly block 1B has a small front-rear width by subtracting the front-rear width of the tread 13 from the front-rear width of the assembly block 1, and has a rectangular shape in a side view and a substantially hollow box shape. For this reason, the assembly blocks 1 other than the lowermost and uppermost stages will be described here, and only the differences between the lowermost and uppermost assembly blocks 1A and 1B will be described.

  As shown in FIGS. 5 and 6, each of the assembly blocks 1 is formed by integrally forming a metal plate such as a stainless steel plate by punching or bending. That is, the assembly block 1 is formed by bending the upper and lower and front and rear four sides of the wide side plate 6 in the front-rear direction by 90 °, respectively, so that the upper side 2 and lower side 3 are parallel to each other, and the front side 4 and rear are parallel to each other. Sides 5 are formed. Further, reinforcing ribs 2a to 4a having a predetermined width, which are bent inward at 90 °, are provided on the upper and lower and front and rear sides 2 to 4, respectively. Note that the portions where the reinforcing ribs 2a to 4a overlap at the four corners on the inner surface side are connected and fixed by a connecting tool such as a screw or a rivet (not shown) or welding.

  Further, the upper side part 2 is formed with an upper stage connecting part 2b for connecting and fixing the assembly block 1 adjacent to the upper stage side to the front part via a plurality of connecting bolts and nuts (fixing tools) B1, and a tread 13 at the rear part. Is formed through a fixing screw (fixing tool) B2, and a bolt hole and a screw hole are formed in the upper connecting portion 2b and the tread plate support portion 2c, respectively. The lower side portion 3 is formed with a support connecting portion 3c in which an inclined girder 12 is connected and fixed via a connecting bolt / nut (fixing tool) B3 at the front portion, and the assembly block 1 adjacent to the lower stage side is formed at the rear portion. The lower connection part 3b to be connected and fixed is formed, and the support connection part 3c and the lower connection part 3b are respectively formed with bolt holes.

  Further, the side plate 6 is formed with substantially triangular punched portions 6c to 6e at the front upper portion, the central lower portion, and the rear upper portion, respectively, and reaches the central portion on the upper side 2 side from the front and rear corner portions. Inclined reinforcing portions 6a and 6b are formed. Further, reinforcing protrusions in the length direction are formed on the inclined reinforcing portions 6a and 6b, respectively. Note that the lowermost and uppermost assembly blocks 1A and 1B do not have the punched portions 6c to 6e and the inclined reinforcing portions 6a and 6b, and only the reinforcing convex portions are formed.

  As a result, each of the assembly blocks 1 is formed in a box shape having a small thickness in the width direction with the inner side surfaces opened, and is lightweight and ensures sufficient mechanical strength such as compression and twisting. In addition, the pair of left and right block rows 11 in which the assembly block 1 is assembled via the upper stage connecting portion 2b and the lower stage connecting portion 3b by the connecting bolt / nut B1 share the load applied to the stair device by itself on the left and right sides. It is configured to have a structural strength that can be supported.

  In addition, as shown in FIG. 10, the assembly block 51 which formed the cross-shaped inclination reinforcement part 56a, 56b which forms the punching parts 56c-56f on the side plate, and connects the corner part on a diagonal line may be sufficient. In these inclined reinforcing portions 56a and 56b, longitudinal reinforcing protrusions are formed on the inclined reinforcing portions 56a and 56b. Further, as shown in FIG. 11, an assembly block 41 in which two punched portions 46b and 46c are formed on the side plate 46 and an inclined reinforcing portion 46a from the lower front corner portion to the upper rear corner portion may be formed. . Since the assembly block 41 is not provided with a reinforcing rib, it can be manufactured by die casting (casting) or the like.

  The inclined girder 12 is an angle-shaped cross section composed of a vertical plate material and a horizontal plate material, and is provided over the entire length of the block row 11. A bolt hole is formed corresponding to the support connecting portion 3c of each assembly block 1, and is configured to be able to support from below by contacting the lower corner portion of the front side portion of each assembly block 1 and the side plate 6. The

  In assembling the stair device, first, the pair of left and right bottom assembly blocks 1A are positioned and fixed at predetermined positions on the floor surface F1. And the mounting bracket 15 is attached to the landing F2 on the upper floor side or the floor. Next, the lower connection portion 3b of the assembly block 1 is applied to the upper connection portion 2b of the lowermost assembly block 1A, and the connection bolt and nut B1 are attached and fixed to the bolt holes. Similarly, the assembly blocks 1 are sequentially assembled and connected and fixed from the lower stage side to the upper stage side, and the block row 11 is assembled. Then, the uppermost assembly block 1 </ b> B assembled at the end of the block row 11 is connected and fixed to the mounting bracket 15. Further, the inclined girder 12 is connected between the floor surface F1 and the mounting bracket 15, and the inclined girder 12 and the support connecting portion 3c of each assembly block 1 are connected and fixed by a connecting bolt / nut B3.

  If a large moment load is applied to the base end side of the block row 11, it may be supported from below using a separate support such as a jack, or the inclined girder 12 may be installed and supported first. You can also. Further, the block row 11 may be assembled by connecting a group of assembly blocks assembled in advance.

  Further, a tread plate 13 is attached by a fixing screw B2 between the tread plate support portions 2c, 2c of the assembly blocks 11, 1A, 1B facing the width direction in the left and right block rows 11. Moreover, the kick board 14 can also be attached between the rear side parts 5 of the assembly blocks 11, 1A, 1B facing each other in the width direction.

  According to the above configuration, a pair of left and right assembly blocks having sufficient strength can be obtained by connecting the plurality of assembly blocks 1, 1A, 1B having the same shape or substantially the same shape via the upper connection portion 2b and the lower connection portion 3b. By assembling the rows 11 and fixing the treads 13 between the tread plate supports 2c of the assembly blocks 1 of the block rows 11 that are opposed to each other in the width direction, there are few types of stair parts (assembly blocks 1, 1A, 1B, inclined The exposed stairway device can be assembled easily and in a short time by using the girders 12, the treads 13 and the like.

  Further, by forming the assembly blocks 1, 1A, 1B in a hollow and box shape, the assembly blocks 1, 1A, 1B can be formed with light weight and high strength, and the upper side connection part 2b of the upper side part 2 front part of the assembly blocks 1, 1A, 1B. The block row 11 can be assembled easily and in a short time by superimposing the lower stage connecting portion 3b on the rear side of the lower side portion 3 and connecting them with a connecting bolt / nut B1 as a fixture. Further, by providing the inclined girder 12, the strength of both block rows 11 can be increased, deformation and twisting can be prevented, and the appearance of the stair device with an exposed structure can be improved.

  Further, the assembly blocks 1 and 1 can be connected and fixed with their positions shifted back and forth by changing the positions of the bolt holes in the upper connection part 2b and the lower connection part 3b or by selecting a plurality of bolt holes formed in advance. Accordingly, it is possible to provide a stair device having different front and rear widths of the treads and a stair device having a different inclination, and the design of the stair device can be easily changed while using the same assembly block 1.

  The assembly blocks 1, 1 </ b> A, 1 </ b> B are bent around the four sides of the side plate 6 to form the upper and lower sides 2, 3 and the front and rear sides 4, 5, and further bent along each edge to form the reinforcing ribs 2 a to 5 a. By forming, a low-cost staircase device that is easy to manufacture, lightweight, and has sufficient strength can be provided. Further, by forming the punched portions 6c to 6e and providing the inclined reinforcing portions 6d and 6e, the weight can be reduced and the aesthetics can be imparted without reducing the strength of the assembly block 1.

[Embodiment 2]
A second embodiment of the linear portion of the stair device according to the present invention will be described with reference to FIGS.
This stair apparatus uses an assembly block 21 in which the previous assembly block 1 is formed in a vertically long shape. In addition, the same code | symbol is attached | subjected to the same member and description is abbreviate | omitted.

  This staircase device forms a vertically long assembly block 21 having the same structure as that of the previous assembly block 21, an upper stage connection portion 24 b is provided above the front side portion 4, and a lower stage connection portion 25 b is provided below the rear side portion 5. Then, the assembly block 21 is connected by the connecting bolt / nut B1 via the upper connecting portion 24b and the lower connecting portion 25b, and the block row 11 is assembled. Here, the full length of the upper side part 2 becomes the tread board support part 2c. Further, although the lowermost assembly block 21A is necessary, the intermediate assembly block 21 can be used as the uppermost assembly block.

  According to the second embodiment, the same operational effects as those of the first embodiment can be obtained, and the position of the bolt holes in the upper connection portion 24b and the lower connection portion 25b can be changed, or a plurality of bolt holes formed in advance can be provided. By selecting, the assembly blocks 1 and 1 can be connected and fixed while being displaced up and down. Therefore, it is possible to provide a staircase device having a different height and gradient of the tread board 13, and to easily change the design of the staircase device while using the same assembly block 1.

  In each of the above-described embodiments, etc., the hollow box-shaped assembly blocks 1 and 21 are rectangular in side view, but in the first embodiment, the upper-stage connecting portion 2b and the lower-stage formed at least on planes parallel to each other. It is preferable to provide the connection part 3b, and in this case, the shapes of the front side part 4, the rear side part 5 and other parts are not limited. In the second embodiment, it is preferable to provide an upper connection part 24b and a lower connection part 25b formed on at least parallel planes. In this case, the shapes of the upper side part 2, the lower side part 3 and other parts are not limited. Absent.

  In addition, although the assembly blocks 1, 21, 41, 51 are formed by bending a steel plate, an aluminum alloy or the like can be integrally formed by casting (aluminum die casting) or the like. Further, the assembly blocks 1, 21, 41, 51 may be made of wood or reinforced resin, or may be formed of a composite such as metal, reinforced resin, or timber.

[Embodiment 3]
The assembly block of the stair apparatus according to the present invention will be described with reference to FIGS.
The assembly block 61 is configured by cutting a mold material formed by extruding a light metal material, for example, an aluminum alloy, into a predetermined size and shape, and attaching a support plate 65 to the upper surface thereof. An outer plate 62 having a plurality of vertical recesses 62a for use and reinforcement, a front plate 63 bent at right angles from the front side of the outer plate 62, and an inner side from the rear side of the outer plate 62 And a rear plate portion 64 bent at a right angle to a channel-shaped cross section. The front plate portion 63 and the rear plate portion 64 are provided with reinforcing ribs 63a and 64a on the inner surface side, and tapping screws B6 are provided on the inner surfaces of the proximal end sides of the reinforcing ribs 63a and 64a and the inner surface of the central portion of the outer plate portion 62. Boss portions 62b, 63b, 64b to which can be attached are formed.

  The assembly block 61 has an upper surface cut along a horizontal plane and a lower surface cut along an inclined surface along the inclination direction of the stair device. Further, a tapping screw B6 having a support plate 65 as a connecting tool is attached to and attached to the boss portions 62b, 63b, and 64b on the upper surface, and the upper surface is configured as a tread plate support portion 67.

Further, the lower outer surface of the front plate portion 63 is configured as a lower connecting portion 68 to form a plurality of bolt holes, and the outer surface of the rear plate portion is configured as an upper connecting portion 69 to form a plurality of bolt holes.
Accordingly, the upper connecting portion 69 of the lower assembly block 61 and the lower connecting portion 68 of the upper assembly block 61 are connected and fixed through the connecting bolt / nut (fixing tool) B1 inserted into the bolt hole, and the same. Assemble the block row from the bottom side. Then, a pair of left and right block rows are installed between the floor and the upper floor, and the tread plate 13 is fixed between the tread plate support portions 67 facing in the width direction in the left and right block rows via mounting screws B7 which are fixing tools. . Further, a molding material 66 that is a blindfold material is mounted on the lower surfaces of both block rows along the inclination direction. The mall material is intended to improve aesthetics.

  According to the third embodiment, in addition to the effects of the first and second embodiments, the assembly block 61 is formed by using a mold material obtained by extruding a lightweight and easy-to-process aluminum alloy. Stair parts can be manufactured at low cost.

[Embodiment 4]
An assembly block 71 of this stair device is formed by cutting a long and short rectangular tube-shaped mold material, and a support plate 65 is attached to the upper surface to constitute a tread plate support portion 67, which is the same member as in the third embodiment. Are denoted by the same reference numerals and description thereof is omitted. The mold member is formed in a square cylinder shape including an outer plate portion 62 and an inner plate portion 72 which are parallel to each other, and a front plate portion 63 and a rear plate portion 64. According to the fourth embodiment, the same effects as those of the third embodiment can be obtained, a high-strength block row can be formed, and the structure is more sufficient than the assembly block 61 having a channel-shaped cross section. A block row having strength can be formed.

[Embodiment 5]
The round part stair apparatus according to the present invention will be described with reference to FIGS.
As shown in FIGS. 16 and 17, the rounded stairway device connects, for example, the floor surface F and the mezzanine floor MF, and has a 90 ° centering on a central axis (vertical axis) O in the vertical direction. It is formed in seven steps in the range. Then, the outer peripheral block ¼ having an arc shape with a radius Ro (hereinafter referred to as a spiral direction) formed by connecting the assembly blocks 111 on the outer peripheral side having the same shape at every division angle α≈17 ° is formed. The side assembly block row 101 and the inner peripheral assembly block 121 having the same shape for each division angle α are connected to form a quarter view formed along the spiral direction of the radius Ri with the center axis O as the center. The arc-shaped inner peripheral assembly block row 102 is connected to the outer peripheral assembly block 111 and the inner peripheral assembly block 121 which face each other in the width direction in the outer peripheral and inner peripheral assembly block rows 101 and 102. And a plurality of footboards 131. Here, the outermost assembly block 111 ′ on the lowermost stage and the assembly block 121 ′ on the innermost side on the lowermost stage are lower in height and lower than the other assembly blocks 111 and 121 on the outer circumferential side and inner circumference side. Are formed in substantially the same shape changed to a horizontal plane.

  Each of the inner peripheral assembly blocks 121 has the same shape, and as shown in FIGS. 19 and 21, for example, is formed of a mold having a substantially channel-shaped cross section obtained by extruding a light metal material such as an aluminum alloy. The assembly block 121 on the inner peripheral side includes an outer plate part 122 having an arc concave cross section with a radius Ri in plan view, a front plate part 123 bent to the inner side (outer peripheral side) from the front side of the outer plate part 122, and an outer side. A rear plate portion 124 that is bent inward (outer peripheral side) from the rear side of the plate portion 122, and includes a corner portion of the outer plate portion 122 and the front plate portion 123 and a corner portion of the outer plate portion 122 and the rear plate portion 124. Screw bosses 125, 125 for attaching tapping screws are formed on the inner side of each.

  The assembly block 121 on the inner peripheral side is provided with a lower connecting portion 126 at the lower portion of the front plate portion 123, and further provided with an upper connecting portion 127 on the rear plate portion 124, each having a plurality of connecting holes (bolt holes) 126a, 127a is formed.

  Further, the upper surface of the assembly block 121 on the inner peripheral side is cut along a horizontal plane, and a support plate 129 is attached via a coupling tool b21 such as a tapping screw attached to the screw bosses 125, 125. Then, a tread plate support portion 128 is provided on the support plate 129, and the tread plate 131 is attached by a connector b22 such as a tapping screw. Moreover, the lower surface of the assembly block 121 on the inner peripheral side other than the lowermost step is cut by an inclined surface along the spiral direction of the staircase device. An inner peripheral side molding material 130 is attached to the inclined surface along the lower surface of the assembly block row 102 on the inner peripheral side to cover the inclined surface and improve the appearance. Instead of the inner peripheral molding material 130, a cover material 130A made of resin or synthetic rubber may be attached to each lower surface of each inner peripheral assembly block 121.

  As shown in FIGS. 19 and 20, each of the assembly blocks 111 on the outer peripheral side is integrally formed by connecting divided blocks 111A and 111B divided into a plurality (two in the figure) in the depth direction. Each of the divided blocks 111A and 111B has a substantially channel-shaped cross section having the same cross-sectional shape in plan view, and is formed of a mold material obtained by extruding a light metal material such as an aluminum alloy. Each of the divided blocks 111A and 111B includes an outer plate 112 having an arc convex cross section with a radius Ro in plan view, and a front plate 113 bent inward (inner side) from the front side of the outer plate 112, A rear plate 114 bent from the rear side to the inner side (inner side) from the rear side of the outer plate 112, the inner side of the corner portion of the outer plate 112 and the front plate 113, the outer plate 112 and the rear plate Screw bosses 115 and 115 for tapping screws are respectively formed inside corner portions of the portion 114.

  Then, the rear plate 114 of the front divided block 111A and the front plate 113 of the rear divided block 111B are connected by a connecting tool 111C such as a connecting bolt or rivet to form an integrated outer assembly block 111. In addition, a lower connecting portion 116 is provided below the front plate portion 113 of the front divided block 111A, and an upper connecting portion 117 is further provided on the rear plate portion 114 of the rear divided block 111B, each of which includes a plurality of connecting holes (bolt holes). ) 116a and 117a are formed.

  Further, the upper surface of the assembly block 111 on the outer peripheral side is cut along a horizontal plane, and a support plate 119 is attached via a connector b11 such as a tapping screw attached to the bosses 125 for screws. And the tread board support part 118 is attached on the support board 129 by connecting tools B12, such as a tapping screw. Further, the lower surface of the inner peripheral side assembly block 121 other than the lowest step is cut by an inclined surface along the spiral direction of the staircase device, and this inclined surface is disposed along the lower surface of the outer peripheral side assembly block row 101. An outer peripheral molding material 120 that covers the inclined surface and improves the appearance is attached via a tapping screw or the like. A cover material 120A made of resin or synthetic rubber may be attached to each lower surface of each outer peripheral assembly block 111.

The lowermost assembly block 111 on the outer peripheral side is also formed by a divided block having a lower surface whose lower surface is cut along a horizontal plane.
The step board 131 has a partial fan shape that spreads at a split angle α, and is attached over the step board support part 118 of the assembly block 111 on the outer peripheral side and the step board support part 128 of the assembly block 121 on the inner peripheral side.

  First, the front divided block 111A and the rear divided block 111B are connected by the connecting tool 111C to form an integral outer assembly block 111. Then, a support plate 119 is attached to the upper surface of each outer peripheral assembly block 111. Furthermore, a connecting tool (not shown) such as a connecting bolt in which the upper connecting portion 117 of each outer assembly block 111, 111 ′ and the lower connecting portion 116 of the outer assembly block 111 are mounted in the connecting holes 116a, 117a. Are sequentially connected to form the outer peripheral block row 101. And this outer periphery block row | line | column 101 is connected and fixed between the floor surface F and the side wall surface of the mezzanine floor MF, and then the outer peripheral side molding material 120 is mounted along the lower surface of the outer peripheral block row 101.

  Further, a support plate 129 is attached to the upper surface of each inner peripheral assembly block 121. A connecting tool such as a connecting bolt (not shown) in which the upper connecting portion 127 of each inner peripheral assembly block 121, 121 ′ and the lower connecting portion 126 of the outer assembly block 121 are mounted in the connecting holes 126a, 127a. To form the inner peripheral block row 102. Then, the inner peripheral block row 102 is connected and fixed between the floor surface F and the side wall surface of the mezzanine floor MF, and then the inner peripheral side molding material 130 is mounted along the lower surface of the inner peripheral block row 102.

Then, the tread plate 131 is attached across the tread plate support portion 118 of the outer assembly block 111 facing the width direction and the tread support portion 129 of the inner assembly block 121.
The assembly blocks 111 and 121 use channel-shaped cross-section molds, but as shown in FIGS. 22 (a) and 23, the channel-shaped cross-section molds have square plate shapes having outer plate portions 182 and 192. You may comprise the assembly block 181 (partition block 181A, 181B) of the outer peripheral side and the assembly block 191 of an inner peripheral side with the cross-sectional mold material. Note that the same parts as those in the fifth embodiment are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 22B, when sufficient strength can be obtained, the assembly block 181 on the outer peripheral side may be constituted by one assembly block 181 ′ instead of the division block.

(Handrail part of staircase device)
Next, attachment examples 1 to 3 of the handrail part installed in these stair devices using a common mounting bracket and the mounting bracket will be described with reference to FIGS. 24 to 32.

In the conventional stair railing mounting structure, as shown in, for example, Japanese Patent Laid-Open No. 6-316996, a column is mounted via a stair fixing piece that is fitted into an outer surface opening of an inclined beam member. In the stair device having an exposed structure that places importance on the appearance, it is desirable in terms of appearance that the outer surface of the beam is formed flat, and such a conventional stair rail attachment structure cannot be employed.
(1 of mounting bracket)
In the present invention, as shown in FIG. 24, a plurality of mounting brackets 142 having the same structure are used to assemble the assembly block, the support column, and the handrail material, and can be easily attached to a flat surface in a short time. It can be done. That is, the mounting bracket 142 has a mounting surface 142b in which a bolt hole 142a is formed and a base plate 142c formed in a lateral width W, and a fixed mounting angle θ with respect to the mounting surface 142b (in FIG. The lateral width W is formed with a connecting portion 142d connected to the base plate 142c at the same or approximate 45 °, and a boss hole 142f for inserting the connecting bolt in a direction perpendicular to the bolt hole 142a at the tip of the connecting portion 142d. The boss cylinder 142e is provided at a position perpendicular to the bolt hole 142a and the boss hole 142f at a predetermined interval L. Also, as shown in FIG. If two bolts 142a, 142a are arranged on the axis a, the two mounting brackets 142 arranged in a symmetrical posture with a spacing close to Boss holes 142f and 142f are respectively arranged on the inclined line b along θ. Thereby, the vertical support | pillar material and the member along attachment angle (theta), ie, the assembly block row | line | columns 101 and 102 of the outer peripheral side and the inner peripheral side, and the cap wood 144 can be connected easily and firmly. Further, a blindfold panel made of glass or punching metal can be attached between the support pillars of the handrail portion by the mounting bracket 142.

(Handrail installation example 1)
The handrail portion 141 shown in FIG. 25 and FIG. 26 has two mounting brackets 142, 143D on the standing support portion 143D below the pair of front and rear plate-like strut members 143 and 143 arranged at an interval of the front and rear width W. 142 are mounted on the outer assembly block 111 or the inner assembly block 121, respectively.

  Mounting brackets 142, 142 are disposed between the support members 143, 143 in the vertical position on the upright support portion 143D, and are connected by connecting bolts B11 attached to the bolt holes of the support members 143, 143 and the boss holes 142f. It is fixed. Further, the base plate 142c of the upper mounting bracket 142 is disposed at the lower portion, and the base plate 142c of the lower mounting bracket 142 is disposed at the upper portion. Then, the mounting surfaces 142b, 142b of the mounting brackets 142, 142 are respectively applied to the outer side plate part 112 of the outer peripheral side assembly block 111 and the outer side plate part 122 of the inner peripheral side assembly block 121, respectively. The mounting brackets 142 and 142 are attached to the assembly blocks 111 and 121 on the outer peripheral side and the inner peripheral side by the bolt holes formed in 122 and the connecting bolt B12 inserted into the bolt holes 142a and 142a of the mounting brackets 142 and 142. The members 143 and 143 are erected and fixed at predetermined positions of the outer assembly block row 101 and the inner assembly block row 102.

  Further, a cap wood 144 is attached to the cap mounting portion 143U at the upper end of the support members 143, 143 via two pairs of mounting brackets 142, 142 in the front and rear. The support fittings 142 and 142 on the support column side are attached via the attachment surfaces 142b and 142b by the respective bolt holes 142a and 142a and one connecting bolt B13 inserted into the bolt holes of the support material 143. Further, the boss holes 142f and 142f of the front and rear mounting brackets 142 and 142 are fixed at positions along the inclined line b along the inclination direction of the staircase device. Then, one connecting bolt B14 is inserted and connected to the boss holes 142f, 142f of the respective mounting brackets 142, 142 of the front and rear of these groups and the boss holes 142f, 142f of the other mounting brackets 142, 142 on the headboard side. The Further, the mounting surfaces 142b, 142b of the other mounting brackets 142, 142 on the headboard side are abutted against the bottom surface of the headwood 144, and the mounting brackets 142, 142 are connected by connecting bolts B15, B14 inserted into the bolt holes 142a, 142a. And the cap wood 144 are connected and fixed.

  In addition, although the support | pillar material 143 was comprised by two plate-shaped materials, it may be one plate material, and the channel-shaped cross section which connected two plate-shaped parts to the flange surface and connected the outer side part with the connection surface. It may be a support material.

(Handrail installation example 2)
In addition, as shown in FIG. 27, another handrail portion 151 uses a rectangular column-shaped support material 153, and is inserted into the bolt hole and the bolt holes 142a and 142a of the support material 143 in the standing support portion 153D. With the single connecting bolt B13, two pairs of upper and lower mounting brackets 142, 142 are attached to the column member 143 in a symmetrical posture, and the connecting portion 142d of the front and rear mounting brackets 142, 142 is along the inclined line b. Fixed in position. The pair of front and rear mounting brackets 142 and 142 are provided in two upper and lower stages. Further, the connecting bolt B14, the bolt hole of the outer plate 112 of the outer assembly block 111 or the bolt hole of the outer plate 122 of the inner assembly block 121, and the boss holes 142f, 142f of the mounting brackets 142, 142 B14 is inserted to attach the mounting brackets 142, 142 to the outer peripheral side and inner peripheral side assembly blocks 111, 121, respectively, and the column members 153 are provided on the outer peripheral side assembly block row 1 and the inner peripheral side assembly block row 102. Standing and fixed in position.

It should be noted that the blindfold panel can be mounted via the connecting bolts inserted into the boss holes 142f and 142f in such a state that the mounting brackets 142 and 142 are attached to the support column 143.
Further, the cap mounting portion at the upper end of the support member 153 is the same as that in the first handrail mounting example 1.

  Of course, the connecting portions 142d of the front and rear mounting brackets 142 and 142 are mounted so as to be along the inclination direction of the stair device, but as shown in FIG. 28, the front and rear mounting brackets 142 and 142 are made symmetrical with respect to the column material 153. It can also be attached in a posture.

(Handrail installation example 3)
As shown in FIG. 29, a pair of front and rear mounting brackets 142 and 142 are attached to the standing support portion 153D of the square columnar column member 153 by a single connecting bolt B7 through the boss holes 142f and 142f, respectively. Two sets of upper and lower are attached. The rear mounting bracket 142 of each set is mounted in a symmetrical posture with the base plate 142b on the upper side and the front mounting bracket 142 with the base plate 142b on the lower side. The bolt holes 142a, 142a is set so as to be substantially arranged on a line along the inclination angle of the staircase device. And it was inserted in the bolt hole formed in the outer side plate part 112 of the assembly block 111 on the outer peripheral side and the outer side plate part 122 of the assembly block 121 on the inner peripheral side, and the bolt holes 142a and 142a of the mounting surfaces 142b and 142b. The mounting bolts 142 and 142 and the assembly blocks 111 and 121 on the outer peripheral side and the inner peripheral side are connected and fixed by the connection bolt B18, and the column members 143 and 143 are assembled on the assembly block row 101 on the outer peripheral side and the assembly block on the inner peripheral side. The column 102 is fixed upright at a predetermined position.

(2 of mounting bracket)
As shown in FIG. 30, the mounting bracket 162 is the same except that the shape of the connecting portion 142d of the mounting bracket 162 is different. That is, in the mounting bracket 152, the base plate 142c and the boss cylinder 142e are connected by a connecting portion 142d ′ of a curved protrusion that swells toward the base plate 142c, and the base plate 142c protrudes outside the connecting portion 142d ′. Absent. As a result, compared to the previous mounting bracket 142, the rotation angle range that does not interfere with the base plate 142c centered on the boss portion 142f can be widened, so that the boss portion 142f is supported via the connecting bolt. The inclination angle of the member to be increased can be increased.

In addition to the mounting examples 1 to 3 of the previous mounting bracket 142, the mounting bracket 162 can be separately mounted as described below.
(Handrail installation example 4)
In the case of the headboard mounting portion 163U for mounting the headwood 144 to the column member 143 using the mounting bracket 162, the connecting bolt B21 is inserted into the boss holes 142f, 142f of the two mounting brackets 152 as shown in FIG. They are connected to each other, the mounting surface 142a of one mounting bracket 152 is applied to the front surface of the column member 143, and the connection bolt B22 is inserted into the bolt hole 142a and the bolt hole of the column member 143 and fastened. Further, the mounting surface 142a of the other mounting bracket 152 is applied to the front surface of the cap lumber 144, and the connecting bolt B23 is inserted into the bolt hole 142a and the bolt hole of the cap lumber 144 and fastened. Here, when the mounting bracket 152 rotates around the connecting bolts B22 and B23, another bolt hole may be formed one by one, and the two connecting bolts B22 and B23 may be provided.

  The standing support portion 163D is directly attached to the tread plate 13 (131). That is, as shown in FIG. 32, the mounting surface 142a of the mounting bracket 152 is applied to the bottom surface of the tread plate 13 on the bottom rear portion and the upper front portion of the left and right end bottom surfaces of the tread plate 13 and tapped through the bolt holes 142a. Each is fixed with bolts B31. Then, the connecting bolts B32 are inserted into the boss holes 142f of the mounting brackets 152 and the bolt holes of the support material 143 and fastened. Thereby, the support | pillar material 143 can be standingly fixed to the tread board 13 directly.

  According to the fifth embodiment, a plurality of outer peripheral assembly blocks 111 having the same shape are connected via the upper connection portion 117 and the lower connection portion 116 to form the outer assembly block row 101 along the spiral direction. Install. Further, a plurality of inner peripheral assembly blocks 121 having the same shape are connected through an upper connecting portion 127 and a lower connecting portion 126 to form an inner assembly block row 102 along the spiral direction. Then, the tread plate 131 is attached across the tread plate support portion 118 of the outer assembly block 111 of the outer assembly block row 101 and the tread plate support portion 128 of the inner assembly block 121 of the inner assembly block row 102. This makes it possible to easily and quickly assemble the R-stage stairway device with a small number of types of staircase parts including the inner peripheral assembly block 121, the outer peripheral assembly block 111, and the tread plate 131, and are suitable for the exposed structure. Some staircase devices can be provided.

  In addition, the outer peripheral assembly block 111 and the inner peripheral assembly block 121 are respectively formed from a mold formed by extruding a lightweight metal material, whereby the inner and outer assembly block rows 101 and 102 are reduced in weight and cost, respectively. In addition, it is possible to obtain sufficient strength by making the outer assembly block 111 and the inner assembly block 121 each have a substantially channel-shaped cross section. Can be provided.

  Further, the outer assembly block 111 having a long depth in the arc direction is integrally formed by connecting two divided blocks 111A and 111B having the same cross-sectional shape, so that the parts can be reduced in size and increased in strength. It is possible to reduce the labor of parts transportation and assembly work.

  Furthermore, the support plates 129 and 119 are attached to the upper surfaces of the inner assembly block 121 and the outer assembly block 111 to form the tread plate support portions 128 and 118, respectively, and the inner plate formed on the inclined surface in the spiral direction. By attaching the inner and outer peripheral side molding members 130 and 120 along the lower surfaces of the peripheral assembly block row 102 and the outer peripheral assembly block row 101, respectively, it is possible to provide a rounded portion staircase device that is excellent in aesthetics and suitable for an exposed structure. .

  Further, according to the handrail portions 141 and 151, the lower standing support portions 143D and 153D use a plurality of mounting brackets 142 and 152 having the same shape as a common member, and have two plate shapes, channel shapes, and rectangular tubes. Can be attached to the inner assembly block row 102 and the outer assembly block row 101 easily and firmly in a short time. Further, the cap member mounting portion 143U at the upper end of the support members 143 and 153 can also easily and firmly mount the cap member 144 installed along the spiral direction in a short time using the common mounting brackets 142 and 152. it can.

It is a disassembled perspective view of the principal part which shows Embodiment 1 of the staircase apparatus which concerns on this invention. It is a partially cutaway sectional view showing the principal part of the staircase device. It is a whole side view showing the stair device. It is a whole front view of the stair device. It is a perspective view which shows the assembly block of the stair device, (a) is an outer surface side perspective view, (b) is an inner surface side perspective view. It is an expanded view which shows the assembly block of the stair device. It is a disassembled perspective view of the principal part which shows Embodiment 2 of the staircase apparatus which concerns on this invention. It is a perspective view which shows the assembly block of the stair device, (a) is an outer surface side perspective view, (b) is an inner surface side perspective view. It is a whole side view of the stair device. It is an outer surface side perspective view which shows the modification 1 of an assembly block. It is an outer surface side perspective view which shows the modification 2 of an assembly block. It is a partial side view of the block row which shows Embodiment 3 of the assembly block of the stair device. It is AA sectional drawing shown in FIG. It is a partial side view of the block row which shows Embodiment 4 of the assembly block of the stair device. It is BB sectional drawing shown in FIG. It is a whole top view which shows Embodiment 5 of the stairway apparatus of the round part which concerns on this invention. It is a whole disassembled perspective view of the stair device. It is a whole front view of the stair device. It is a partial exploded perspective view of the stair device. It is an external view which shows the assembly block of the outer peripheral side of the stair device, (a) is a top view, (b) is an inner side view. It is an external view which shows the assembly block of the inner peripheral side of the stair device, (a) is a top view, (b) is an inner side view. It is a top view which shows the other assembly block of the outer peripheral side using the other type | mold material of the stair device, (a) is a top view of the assembly block which consists of a division block, (b) is a top view of a single assembly block is there. It is a top view which shows the other assembly block of the inner peripheral side which uses the other type | mold material of the staircase apparatus. It is an external view of the mounting bracket which is a common component used for the handrail part, (a) is a side view, (b) is the perspective view of the front side and back side which show the example of arrangement | positioning. It is a partial side view which shows the example 1 of attachment of the handrail part. It is the elements on larger scale of the example 1 of attachment, (a) is a side view of a standing support part and a coping mounting part, (b) is a front view of a standing support part. It is a partial expanded side view which shows the example 2 of attachment of the handrail part. It is a partial expanded side view which shows the modification of the standing support part of the attachment example 2 of the handrail part. It is a partial expanded side view which shows the standing support part of the attachment example 3 of the handrail part. It is an external view of the other mounting bracket used for the handrail part, (a) is a side view, (b) is the perspective view of the front side and back side which show the example of arrangement | positioning. It is an external view which shows the coping mounting part by the mounting bracket, (a) is a side view, (b) is a rear view. It is an external view which shows the standing support part by the mounting bracket, (a) is a side view, (b) is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Assembly block 1A Bottom assembly block 1B Top assembly block 2 Upper side 2a Reinforcement rib 2b Upper connection 2c Footboard support 3 Lower side 3a Reinforcement rib 3b Lower connection 3c Support connection 4 Front side 4a Reinforcement rib 5 Rear Side part 5a Reinforcement rib 6 Side plate 6a-6c Punched part 6d, 6e Inclined reinforcement part 11 Block row 12 Inclined girder 13 Tread plate 21 Assembly block 24b Upper connection part 25b Lower connection part O Center axis F Floor surface MF Middle second floor 101 Outer side Assembly block row 102 inner assembly block assembly 111 outer assembly block 111 ′ lowermost assembly block 111A division block 111B division block 111C connector 112 outer plate portion 113 front plate portion 114 rear plate portion 115 Screw boss 116 Lower link portion 117 Upper link portion 118 Tread plate support portion 1 9 Support plate 120 Outer peripheral side molding material 121 Inner peripheral side assembly block 121 'Lowermost inner peripheral side assembly block 122 Outer plate part 123 Front plate part 124 Rear plate part 125 Screw boss 126 Lower stage connection part 127 Upper stage connection part 128 tread plate support portion 129 support plate 130 outer peripheral side molding 131 131 tread plates 141, 51 handrail portion 142 mounting bracket 144 cap wood 181, 181 ′ outer assembly block 181 A division block 181 B division block 191 inner assembly block

Claims (10)

A plurality of block rows formed by connecting a plurality of assembly blocks along the inclination direction from the lower front portion to the upper rear portion, and a tread for connecting the assembly blocks facing each other in the width direction in each block row,
Each of the assembly blocks is formed in the same shape or substantially the same shape, and an upper connection portion that connects and fixes each assembly block to an adjacent upper assembly block via a fixture, and an adjacent lower assembly. A stairway device provided with a lower stage coupling part that couples and fixes a block via a fixture, and a tread board support part that couples and fixes the tread board. Each assembly block is formed in a hollow shape having at least an upper side and a lower side,
The stairway device according to claim 1, wherein an upper stage connecting portion is provided at a rear portion of the upper side portion of the assembly block, a tread board support portion is provided at a front portion, and a lower step connecting portion is provided at a rear portion of the lower side portion. Each assembly block is formed in a hollow shape having at least a front side portion and a rear side portion,
The stairway device according to claim 1, wherein an upper stage connecting portion is formed at an upper portion of a rear side portion of the assembly block, and a lower stage connecting portion is formed at a lower portion of the front side portion. An inclined girder that supports the assembly block from below is provided along each block row,
The staircase device according to any one of claims 1 to 3, wherein each assembly block is provided with a support connection portion to which the inclined beam is connected. Each assembly block is formed by bending the upper and lower and front and rear sides of the side plate to form the upper side, the lower side, the front side and the rear side, and the side view is formed in a rectangular shape,
Furthermore, a reinforcing rib formed by bending inside each side part is provided,
The stairway device according to claim 3 or 4, wherein the side plate is provided with a plurality or a single inclined plate portion by a punching portion. The assembly block includes at least an outer plate portion, a front plate portion bent inward from the front side of the outer plate portion, and a rear plate portion bent inward from the rear side of the outer plate portion. The stairway device according to claim 1 or 3, wherein the step device is formed of a substantially channel-shaped mold material or a substantially rectangular tube-shaped mold material having the same cross-sectional shape. Inner peripheral assembly block rows formed by connecting a plurality of inner peripheral assembly blocks in an inclined direction from the lower front part to the upper rear part and in an arc shape centering on the vertical axis in plan view, and a plurality of outer peripheral parts Outer assembly block row formed by connecting the assembly blocks on the side from the lower front portion to the upper rear portion in an inclined direction and in an arc shape centering on the vertical axis in plan view, and the inner assembly block row And a tread that connects the assembly blocks facing in the width direction in the assembly block row on the outer peripheral side,
The outer assembly block and the inner assembly block are formed in the same shape or substantially the same shape, and an upper assembly block is connected and fixed to each assembly block via a fixture. A stairway device provided with a lower part connecting part for connecting and fixing a connecting part and an adjacent lower assembly block via a fixture, and a tread board support part for connecting and fixing the tread board. The assembly block on the inner peripheral side and the assembly block on the outer peripheral side are folded at least on the outer plate part, the front plate part bent inward from the front side of the outer plate part, and the inner side from the rear side of the outer plate part. The stairway device according to claim 7, wherein the stepped device is formed of a substantially channel-shaped mold material or a substantially rectangular tube-shaped mold material having the same cross-sectional shape in plan view having a rear plate portion. Each assembly block has an upper surface along the horizontal plane and a lower surface along the inclined direction,
The staircase device according to claim 6 or 8, wherein a tread plate support portion is provided on the upper surface via a support plate. The stairway device according to claim 8, wherein the assembly block on the outer peripheral side is integrally formed by connecting divided blocks divided into a plurality in the depth direction.

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