JP2007120008A - Connecting structure of staircase support - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting structure of a staircase support, in which a plurality of support bodies are continuously provided, and which imparts a neat appearance to a joined part between the support bodies. <P>SOLUTION: In this connecting structure of the staircase support 1 for supporting a plurality of spirally arranged treadboards, the staircase support 1 is composed of the two support bodies 11 and 11 which are continuously provided in a vertical direction, and a connecting member 12 for connecting the support bodies 11 and 11 adjacent to each other; the support body 11 is tubularly formed; and the connecting member 12 is inserted in a relatively unrotatable state into the internal space part 11f of each of the support bodies 11 and 11 adjacent to each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a connecting structure of staircase columns.

  A staircase formed by arranging a plurality of treads in a spiral shape is disclosed in Patent Literature 1, Patent Literature 2, and the like.

  The staircases disclosed in these are staircases of a type in which each tread is supported by two brackets projecting in a V shape in plan view from the stair column, but by configuring each bracket using an elongated frame, It has succeeded in giving a light impression to the viewers.

  By the way, when such a staircase is installed between floors with a large floor height or when it is installed across a plurality of floors, as disclosed in Patent Document 3, a plurality of column main bodies are arranged in a vertical direction. Thus, it is necessary to form a long stair column. In addition, in the stair-column support structure of Patent Document 3, the flanges provided at the ends of the column bodies are abutted with each other, and the flanges adjacent to each other in the vertical direction are connected by fastening the flanges with bolts and nuts. It is connected.

JP 2004-76281 A JP 2004-76284 A JP 9-256583 A

  However, in the stair column support structure of Patent Document 3, the flange of the column main body remains exposed, and there is a risk of giving a viewer a rugged impression. Furthermore, in the connection structure of the stair column of Patent Document 3, it is necessary to resist only the bolts and nuts that fasten the flanges against the tensile and shearing forces acting on the joints, as well as the bending and torsional moments. For this reason, it is necessary to use large-diameter bolts and nuts or to use a large number of bolts and nuts. However, in this case, there is a possibility that the aesthetic appearance of the joint portion is impaired. In addition, since it is necessary to perform a welding operation or the like in order to provide the flange on the column main body, there is a problem that it takes time and labor to manufacture the flange.

  From such a point of view, the present invention provides a staircase strut connection structure in which a plurality of strut bodies are connected in series, and a staircase strut connection structure in which the appearance of the joint portion between the strut bodies is clear. Further, it is an object of the present invention to provide a stair-column support structure including a column body that is easy to manufacture.

  The present invention for solving such a problem is a staircase strut connection structure that supports a plurality of spirally arranged treads, and a plurality of strut bodies arranged in a vertical direction and the adjacent strut bodies adjacent to each other. A connecting member that connects each other, the column main body is formed into a tubular shape, and the connecting member is inserted into each inner space of the adjacent column main body in a relatively non-rotatable state. It is characterized by being.

  In this staircase strut connection structure, since the strut bodies constituting the staircase struts are connected via a connecting member inserted into the inner space thereof, the connecting member is not exposed, and therefore the joint portion. The appearance of will be neat. In addition, since the connecting member is arranged so as to straddle the boundary portion between adjacent column main bodies, the staircase column connecting structure has high resistance to bending moment and shearing force at the boundary portion (joint portion). Furthermore, since the connecting member is inserted into the inner space of the column main body in a state in which relative rotation is impossible, a high resistance against twisting is exhibited.

  In order to make the column main body and the coupling member relatively unrotatable, for example, on the inner circumferential surface of the column main body, a plurality of concave portions are arranged at equal intervals in the circumferential direction, and on the outer circumferential surface of the coupling member, What is necessary is just to arrange | position the several convex part engaged with the said recessed part at equal intervals in the circumferential direction.

  If the angular pitch of the plurality of recesses of the column main body is made equal to the center angle of the tread board, the joining position of the column bodies adjacent to each other in the vertical direction is the circumferential direction at an angle pitch equal to the center angle of the tread board. Therefore, even if the treads are arranged around each of the plurality of column main bodies, the plurality of treads can be arranged regularly.

  In the present invention, an insertion hole communicating with the inner space portion is formed in the column main body, a female screw hole is formed at a position corresponding to the insertion hole of the connecting member, and the bolt inserted into the insertion hole You may fix the said support | pillar main body and the said connection member by screwing a shaft part in the said female screw hole. If it does in this way, it will become possible to prevent the shift of a connecting member in the up-and-down direction certainly. Although a shearing force due to a torsional moment or the like acts on this bolt, the connecting member is inserted into the inner space of the column main body in a state where relative rotation is impossible, so the column main body is joined only with the bolt. Compared to the case, the magnitude of the shearing force borne by the bolt is small.

  In addition, it is preferable that the column main body and the connecting member are made of an extruded shape made of an aluminum alloy because the manufacturing becomes easy and concave portions and convex portions can be formed during extrusion molding. .

  According to the stair-column support structure according to the present invention, since the connection member that connects the support columns is not exposed to the outside, the appearance of the joint portion between the support columns becomes clean.

  The best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same elements are denoted by the same reference numerals, and duplicate descriptions are omitted. Further, “front and back” in the present embodiment is based on the time when facing the up direction of the stairs.

<Overall configuration>
As shown in FIG. 1, a staircase having a staircase strut connection structure according to the present embodiment is a staircase in which a plurality of treads 5, 5,... It is arranged across multiple floors. In the following description, the portion from the lower floor (first floor) staircase mounting portion F1 to the intermediate floor (second floor) staircase mounting portion F2 is referred to as the lower staircase portion K1, and from the intermediate floor staircase mounting portion F2. The part up to the staircase mounting portion F3 on the upper floor (third floor) may be referred to as the upper staircase portion K2.

  In the present embodiment, a pair of brackets 3 in which each of the plurality of treads 5, 5,... Arranged spirally around the staircase support column 1 protrudes from the stair support column 1 in a plan view (top view) V shape. , 3 (see FIG. 2). Further, in the present embodiment, a plurality of handrail struts 6, 6,... Are erected so as to surround the front end portions (outer edge portions) of the plurality of tread plates 5, 5,. A handrail 7 is arranged.

  As shown in FIG. 2, each bracket 3 has a horizontal V shape when viewed from the front, and the pair of brackets 3, 3 positioned at the same height has staircase posts 1 at their base ends. Are connected to each other via a base 2 fixed to the outer peripheral surface of the two, and their tips are connected to each other via a connecting frame 4. That is, in the present embodiment, a three-dimensional truss structure T having a tetrahedron is formed by the base 2, a set of two brackets 3, 3 adjacent to each other in the front-rear direction, and the connecting frame 4. It can be said that the tread 5 is supported by T.

<Stair support>
As shown in FIG. 3, the stair column 1 (hereinafter referred to as “column 1”) includes a plurality (two in this embodiment) of column bodies 11, 11 connected in the vertical direction (vertical direction). The connecting member 12 that connects the adjacent column main bodies 11 and 11 and the lower column main body 11 (the lowermost column main body 11) and the lower floor stair mounting portion F1 (see FIG. 1) And a support member 13 provided.

  In this embodiment, the column main body 11 is formed of an extruded shape made of an aluminum alloy formed into a tubular shape. A plurality (three in this embodiment) of female screw holes 11a, 11a, and 11a are formed in a region A on the outer peripheral surface of the column main body 11 where the base 2 is fixed. A shaft portion of a bolt B21 having a hexagonal hole for fixing the base 2 is screwed into the female screw hole 11a.

  Insertion holes 11b, 11b,... Communicating with the inner space portion 11f are formed in the upper end portion of the lower column main body 11 and the lower end portion of the upper column main body 11, respectively. The shaft portion of the bolt B11 with a hexagonal hole for fixing the connecting member 12 is inserted through the insertion hole 11b.

  A plurality of bottomed female screw holes 11c, 11c,... Are formed on the lower surface of the lowermost column main body 11 among the column main bodies 11, 11 provided in the vertical direction. A bolt B12 with a hexagonal hole for fixing the support member 13 is screwed into the female screw hole 11c. In addition, although illustration is abbreviate | omitted, the external shape of the support | pillar main body 11 may be made into a polygon.

  As shown in FIG. 4B, the insertion hole 11 b opens in a recess 11 d formed on the inner peripheral surface of the column main body 11. The outer portion of the insertion hole 11b has an enlarged diameter, and has a stepped cylindrical shape. The head portion of the bolt B11 is accommodated in the enlarged diameter portion of the insertion hole 11b.

  A plurality of recesses 11d, 11d,... Are arranged on the inner peripheral surface of the column main body 11 at equal intervals in the circumferential direction. The recess 11d is a space sandwiched between protrusions 11e and 11e provided in parallel to each other over the entire length of the column main body 11, and is formed when the column main body 11 is extruded. The angular pitch α of the plurality of recesses 11d, 11d,... Is equal to the central angle β of the tread plate 5 (see FIG. 10).

  The connecting member 12 shown in FIG. 3 is disposed so as to straddle the boundary portion between the column main bodies 11 and 11 adjacent in the vertical direction (see FIG. 4A), and the adjacent column main bodies 11 and 11 are adjacent to each other. Each of the inner space portions 11f is inserted in a state in which relative rotation is impossible. The connecting member 12 is formed of an extruded shape made of aluminum alloy formed into a tubular shape, and has insertion holes 11b, 11b,... Of the lower column main body 11 and the upper column main body 11 at the central portion in the vertical direction. Female screw holes 12a, 12a,... Are formed at positions corresponding to the insertion holes 11b, 11b,. And the support | pillar main body 11 and the connection member 12 are fixed by screwing the axial part of volt | bolt B11 penetrated to the penetration hole 11b to the internal thread hole 12a. In the present embodiment, the female screw hole 12a is formed in a convex portion 12b described later formed on the outer peripheral surface of the connecting member 12.

  As shown in FIG. 4 (c), on the outer peripheral surface of the connecting member 12, a plurality of convex portions 12b, 12b,... That engage with the concave portion 11d of the column main body 11 are arranged at equal intervals in the circumferential direction. ing. The convex portion 12b is formed in a shape that fits exactly into the concave portion 11d of the column main body 11, and the angular pitch of the plurality of convex portions 12b, 12b,... Is also the central angle β of the tread plate 5 (see FIG. 10). It is equal to. A groove 12c that engages with the protrusion 11e of the column main body 11 is formed between the convex portions 12b and 12b adjacent in the circumferential direction. The protrusion 12b and the groove 12c are provided over the entire length of the connecting member 12, and are formed when the connecting member 12 is extruded.

  In this embodiment, the column main body 11 and the connecting member 12 are fixed using the bolt B11. However, the present invention is not limited to this, and it may be fixed by a method such as welding or adhesion.

  The support member 13 shown in FIG. 3 is made of an aluminum alloy disc having a diameter larger than that of the column main body 11, and is fixed to the lower end of the column main body 11 by a bolt B12. A circular fitting recess 13a into which the lower end portion of the support column body 11 is fitted is formed on the upper surface of the support member 13, and a plurality of female screw holes 11c, 11c, 11c of the support column body 11 are formed in the engagement recess 13a. Are formed with a plurality of bolt insertion holes 13b, 13b,. The bolt B12 is inserted into the bolt insertion hole 13b from the lower surface side of the support member 13. A plurality of bolt insertion holes 13c, 13c,... Are also formed on the outer peripheral side of the fitting recess 13a. A bolt B13 for fixing the support member 13 to the lower-level stair mounting portion F1 (see FIG. 1) is inserted through the bolt insertion hole 13c.

<Base>
As shown in FIG. 5A, the base 2 is made of a block-like member attached to the outer peripheral surface of the column main body 11, and as shown in FIG. The surface 21 is formed into a cylindrical surface according to the shape of the outer peripheral surface of the column main body 11.

  In the base 2, a pair of connecting grooves 22 a and 22 a are formed in a vertical direction on a surface 22 opposite to the contact surface 21. In addition, the connection groove 22a is formed along the radial direction of the column main body 11, and unevenness is formed on the inner wall surface of the connection groove 22a. Further, a plurality of (this embodiment) corresponding to female screw holes 11a, 11a, 11a (see FIG. 3) formed in the region A (see FIG. 3) of the column main body 11 between the pair of connecting grooves 22a, 22a. Then, three stepped bolt insertion holes 22b, 22b, 22b are formed.

  A bottomed female screw hole 23 a is formed at the center of the upper surface 23 of the base 2. A countersunk bolt B51 (see FIG. 10) with a hexagonal hole for fixing the base end portion of the tread plate 5 is screwed into the female screw hole 23a.

<Bracket>
As shown in FIG. 6A, the bracket 3 projects upwardly from the outer peripheral surface of the support column 1 horizontally, and extends downward from the outer peripheral surface of the support column 1 obliquely upward below the upper frame 31. A lower frame 32 and a nodal member 33 that connects the tip of the upper frame 31 and the tip of the lower frame 32 are provided, and have a horizontal V shape when viewed from the front. Note that the bracket 3 according to the present embodiment includes a support piece 34 connected to the node member 33 as shown in FIG.

  As shown in FIG. 6A, the base end portion of the upper frame 31 is connected to the upper portion of the base 2, and is fixed to the outer peripheral surface of the support column 1 through the base 2. The upper frame 31 is obtained by processing a hollow extruded section made of an aluminum alloy having a circular cross section, and has flat connection end portions 31a at both ends thereof. The connection end portion 31a is formed by crushing the end portion of the hollow extruded shape member by pressing or the like. As shown in FIGS. 6B and 6C, the connecting end portion 31a includes a connecting groove 22a of the base 2 (see FIG. 6C) and a connecting groove 33a of the node member 33 described later (see FIG. 6). (See (b)), and the top end portion of the connecting end portion 31a has an unevenness that engages with the unevenness of the connecting groove 22a of the base 2 or the unevenness of the connecting groove 33a of the node member 33 described later. It is formed along a direction (vertical direction in FIG. 6A) perpendicular to the axis 31. In this way, even if a large axial force (tensile force) is applied to the upper frame 31, it is not pulled out from the base 2 or the node member 33. Since the connection end 31 a is formed in a flat shape that is long in the axial direction of the base 2 and the node member 33, the connection structure between the upper frame 31 and the node member 33 is the axial direction of the base 2 and the node member 33. The strength against external force (that is, the vertical direction) is high.

  As shown in FIG. 6A, the base end portion of the lower frame 32 is connected to the lower portion of the base 2, and is fixed to the outer peripheral surface of the support column 1 through the base 2. The lower frame 32 is obtained by processing a hollow extruded shape member made of an aluminum alloy, and has flat connection end portions 32a at both ends thereof. The connecting end portion 32a can be fitted into a connecting groove 22a (see FIG. 6C) of the base 2 and a connecting groove 33a (see FIG. 6B) of a node member 33 described later, and a tip portion thereof. The same unevenness as that of the upper frame 31 is formed. In addition, the unevenness | corrugation of the connection edge part 32a is formed along the direction which makes the angle (alpha) with respect to the axis line of the lower frame 32. As shown in FIG. Thus, the lower frame 32 is connected to the base 2 and the node member 33 in a state where the axis thereof is inclined by the angle α with respect to the axis of the base 2 and the node member 33.

  As shown in FIG. 7, the node member 33 has a cylindrical shape, and a plurality of (three in the present embodiment) connecting grooves 33a, 33a,... Is formed. Concavities and convexities are formed on the inner wall surface of the connecting groove 33a along the center line direction (vertical direction in FIG. 7). A bolt insertion hole 33 b is formed on the center line of the node member 33. The node member 33 is made of an extruded shape made of an aluminum alloy, and the connecting groove 33a and the bolt insertion hole 33b are formed when the aluminum alloy is extruded. The node member 33 may be manufactured by casting. Further, the shape of the node member 33 is not limited to that shown in the figure, and may be a polygonal column shape, for example.

  The support piece 34 shown in FIG. 2 supports the tip portion (outer edge portion) of the tread plate 5, and projects from the node member 33 along the lower surface of the tread plate 5. As shown in FIG. 8, the support piece 34 has a flat connection end portion 34a and an overhang portion 34b protruding from the connection end portion 34a. The connection end portion 34a can be fitted into the connection groove 33a (see FIG. 7) of the node member 33, and the leading end portion of the connection end portion 34a has an unevenness that engages with the unevenness of the connection groove 33a of the node member 33. It is formed along the vertical direction. Moreover, the overhang | projection part 34b is formed with the internal thread hole 34c which penetrates this in an up-down direction. The female screw hole 34c is screwed with a countersunk bolt B52 (see FIG. 10) having a hexagonal hole for fixing the tip portion of the tread plate 5.

  Here, the relationship between the brackets 3 and 3 adjacent to each other in the vertical direction will be described in detail with reference to FIG. As shown in this figure, in this embodiment, the bracket 3 that supports the front side of the upper step board 5 is disposed in the vertical plane including the bracket 3 that supports the rear side of the step board 5, and Node members 33 adjacent to each other in the vertical direction are connected to each other via a columnar member 35. The columnar member 35 is an aluminum alloy cylinder having the same diameter as the node member 33, and a bolt insertion hole (not shown) is formed at the center thereof.

  As described above, in the present embodiment, the adjacent brackets 3 and 3 are connected to each other at the outer peripheral portion thereof, and the lower bracket 3 supports the upper bracket 3. In addition, as shown in FIG. 9, the front-end | tip part is supporting the bracket 3 'which supports the front side of the lowermost tread 5 at the lower floor staircase attaching part F1. In the bracket 3 ′, the length of the node member 33 ′ connecting the tip of the upper frame 31 and the tip of the lower frame 32 is longer than the node members 33 (see FIG. 7) of the other bracket 3, It is fixed to the staircase attachment portion F1 on the lower floor via a pair of support pieces 34 ', 34' connected to the lower end. The support piece 34 ′ is an upside down support piece 34 (see FIG. 8) that supports the tread plate 5, and thus detailed description thereof is omitted. Further, a washer 36 ′ is interposed between the node member 33 ′ and the lower floor stair attachment portion F <b> 1.

<Connection frame>
As shown in FIG. 2, the connecting frame 4 connects the node members 33 and 33 adjacent to each other in the front-rear direction. In the present embodiment, the connecting frame 4 is arranged horizontally and is positioned at the same height. , 33 are connected to each other. The connection frame 4 is obtained by processing a hollow extruded section made of an aluminum alloy having a circular cross section, and has a flat connection end 4a at an end thereof. The connection end 4a can be fitted into the connecting groove 33a (see FIG. 6B) of the node member 33, and the upper frame 31 (see FIG. 6B) is provided at the tip of the connection end 4a. ) Is formed.

<Assembly method of three-dimensional truss structure>
Here, an assembling method of the three-dimensional truss structure T composed of the base 2, the pair of brackets 3, 3 and the connecting frame 4 will be described with reference to FIG. In order to assemble the three-dimensional truss structure T, one end of the upper frame 31 and one end of the lower frame 32 are connected to each of the two coupling grooves 22a and 22a (see FIG. 5A) of the base 2, and the upper The other end of the frame 31 and the other end of the lower frame are connected to the node member 33 to form the two brackets 3, 3, and the node members 33, 33 adjacent to each other in the front and rear are connected by the connection frame 4, A support piece 34 may be connected to the node member 33. In order to connect the upper frame 31 to the base 2, as shown in FIG. 6C, irregularities formed on the connection end 31 a of the upper frame 31 from the upper surface side (or lower surface side) of the base 2. May be inserted into the connecting groove 22a of the base 2, and welding and special tools are not required. The same applies to the connection method of the upper frame 31 to the node member 33, the connection method of the lower frame 32 to the base 2 and the node member 33, and the connection method of the connecting frame 4 to the node member 33.

  A plate-like regulating member 24 (see FIG. 5A) for preventing the upper frame 31 and the lower frame 32 from coming out downward is fixed to the lower surface of the base 2. The connecting groove 22a of the base 2 has a groove filling member (not shown) having the same size and shape as the connecting groove 22a between the connecting end 31a of the upper frame 31 and the connecting end 32a of the lower frame 32. Is inserted into the connecting groove 33a of the nodal member 33 on the lower side of the connecting end 34a (see FIG. 8) of the support piece 34 and the lower side of the connecting end 4a (see FIG. 2) of the connecting frame 4. A groove filling member (not shown) having the same size and shape as the groove 33a is inserted. Note that an adhesive or the like may be poured into the gap in order to fill a minute gap generated between the connecting groove 22a and the connection end 31a.

<Tread>
As shown in FIG. 10, the tread plate 5 is made of a substantially fan-shaped plate material, the base end portion (end portion on the support column 1 side) is fixed to the upper surface of the base 2, and the tip end portion (outer edge portion) is a support piece. 34 is fixed to the upper surface. An edge 5 a on the base end side of the tread plate 5 is formed in an arc shape in accordance with the outer peripheral surface of the support column 1, and is in contact with the outer peripheral surface of the support column 1. The edge 5b on the front end side of the tread board 5 is also formed in an arc shape. In addition, the corners 5 c and 5 c on the front end side of the tread plate 5 are cut out in accordance with the outer shape of the columnar member 35. The tread board 5 may be made of, for example, an aluminum alloy, or may be made of wood or glass.

  In addition, if the base end part of the tread board 5 is fixed to the upper surface of the base 2, it becomes possible to fix the base end part of the tread board 5 firmly. Further, if the edge 5a on the base end side of the tread 5 is formed in an arc shape so as to match the outer peripheral surface of the support column 1, the edge 5a of the tread plate 5 will be in close contact with the outer peripheral surface of the support column 1, so The appearance becomes.

<Handrail support>
As shown in FIG. 11A, the handrail support 6 includes a handrail 61, an upper connection member 62 attached to the upper end of the handrail 61, and a lower connection member 63 attached to the lower end of the handrail 61. In this embodiment, it is erected on the upper surface of the node member 33.

  In this embodiment, the handrail 61 is made of a hollow aluminum alloy extruded shape having a substantially rectangular outer shape. As shown in FIG. 11B, four screw holes 61a, 61a,... And four groove portions 61b, 61b,. A plurality of through holes 61c, 61c,... Are formed on the side surface of the handrail 61. A linear member 64 (see FIG. 1) such as a wire is inserted through the through hole 61c. In addition, although illustration is abbreviate | omitted, the external shape of the support | pillar main body 11 may also be made circular.

  As shown in FIG. 11A, the upper connecting member 62 is interposed between the upper end portion of the handrail 61 and the handrail 7, and is a flange portion that contacts the upper end surface of the handrail 61. 62a, a lower projecting portion 62b projecting from the lower surface of the flange portion 62a, an upper projecting portion 62c projecting obliquely from the upper surface of the flange portion 62a, and an attachment provided at the upper end of the upper projecting portion 62c 62d. The lower protrusion 62 b is formed in a shape that can be inserted into the handrail 61. Further, the mounting portion 62d is formed in a shape that can contact the lower surface of the handrail 7. In order to fix the upper connecting member 62 to the upper end portion of the handrail 61, the lower protrusion 62b is inserted into the handrail 61 and then passes through the lower protrusion 62b from the side surface of the handrail 61. What is necessary is just to screw in the tapping screw B62 to do.

  The lower connecting member 63 is interposed between the lower end portion of the handrail 61 and the node member 33, and has a base portion 63 a that abuts on the upper surface of the node member 33, and projects from the upper surface of the base portion 63 a. And an insertion portion 63c. The base 63a is formed in a disk shape having the same outer diameter as the nodal member 33, and is located at a position corresponding to the screw holes 61a, 61a,... (See FIG. 11B) of the handrail 61. 11 (c), insertion holes 63b, 63b,... Are formed. A tapping screw B63 (see FIG. 11A) for fixing the lower connecting member 63 to the lower end portion of the handrail 61 is inserted through the insertion hole 63b. The insertion portion 63c is formed in a shape that can be inserted into the handrail 61, and an engaging projection 63d that engages with the groove portion 61b of the handrail 61 is formed on the outer peripheral portion thereof. A female screw hole 63e is formed at the center of the insertion portion 63c. A long bolt B31 (see FIG. 11A) inserted through the bolt insertion hole 33b (see FIG. 7) of the node member 33 is screwed into the female screw hole 63e. In order to fix the lower connecting member 63 to the lower end portion of the handrail 61, after inserting the insertion portion 63c into the handrail 61, the tapping screw B63 is inserted into the insertion hole 63b of the base portion 63a, and the tip thereof The portion may be screwed into the screw hole 61a of the handrail 61.

<Handrail>
The handrail 7 shown in FIG. 1 is arranged so as to sew a plurality of handrail struts 6, 6,..., And in this embodiment, is formed of an extruded shape made of an aluminum alloy that has been subjected to a spiral bending process. In order to fix the handrail 7 to the upper end portion of the handrail support column 6, the attachment portion 62d of the upper connection member 62 shown in FIG. 11 is brought into contact with the lower surface of the handrail 7 and then illustrated from the lower surface of the attachment portion 62d. A tapping screw may be screwed in.

<Others>
As shown in FIG. 1, in the staircase according to the present embodiment, a central support 8 is interposed between the outer peripheral surface of the lower column main body 11 and the staircase mounting portion (beam, wall, etc.) F2 on the intermediate floor. A side support 9 is interposed between the uppermost bracket 3 of the lower staircase portion K1 and the staircase mounting portion F2 on the intermediate floor. A central support 8 is interposed between the outer peripheral surface of the upper column main body 11 and the upper floor stair mounting portion (beam, wall, etc.) F3. A side support 9 is interposed between the floor staircase mounting portion F3. In the following, the center bearing 8 and the side bearing 9 attached to the staircase attaching portion F2 will be described.

  As shown in FIG. 3, the central support 8 includes a column side member 8A attached to the outer peripheral surface of the column main body 11, a frame side member 8B attached to the staircase attaching portion F2, a column side member 8A and a frame side member 8B. And a connecting shaft 8C for connecting the two.

  The column-side member 8 </ b> A includes a column contact portion 81 that is formed in accordance with the shape of the outer peripheral surface of the column body 11, and a protruding portion 82 that protrudes from the column contact portion 81. Bolt insertion holes 81 a and 81 a are formed in each of both sides of the protruding portion 82 in the column contact portion 81, and a through hole 82 a is formed in the central portion of the protruding portion 82. A bolt B81 with a hexagonal hole is inserted into the bolt insertion hole 81a of the column abutting part 81, and this bolt B81 is screwed into a female screw hole 11g formed in the column body 11. The support member 8A may be formed by casting an aluminum alloy or may be formed by processing an extruded shape made of aluminum alloy.

  The housing side member 8B includes a housing abutting portion 83 attached to the staircase attaching portion F2, and a pair of holding portions 84 and 84 projecting from the center of the housing abutting portion 83. A bolt insertion hole (not shown) is formed on each side of the pair of holding portions 84, 84 in the housing abutting portion 83, and a bolt B 82 is inserted into the bolt insertion hole. Further, the pair of holding portions 84, 84 are opposed to each other with a space at which the protruding portion 82 of the column-side member 8 </ b> A can be inserted, and a through hole 84 a is formed at the center of each holding portion 84. The support member 8A may be formed by casting an aluminum alloy or may be formed by processing an extruded shape made of aluminum alloy.

  The connecting shaft 8C includes a bolt 85 inserted into the through hole 82a provided in the protruding portion 82 of the column side member 8A and the through hole 84a provided in the pair of holding portions 84, 84 of the housing side member 8B. The nut 86 is screwed to the nut 85. A cap 87 that covers the head of the bolt 85 and the nut 86 is attached.

  In addition, in order to connect the support | pillar side member 8A and the housing | casing side member 8B, after inserting the protrusion part 82 of the support | pillar side member 8A between a pair of holding | maintenance parts 84 and 84 of the housing | casing side member 8B, A bolt 85 may be inserted into the through hole 82a of the projecting portion 82 of 8A and the through hole 84a of each holding portion 84 of the housing side member 8B, and a nut 86 may be screwed to the shaft portion.

  As shown in FIG. 12, the side support 9 connects the bracket side member 9A attached to the node member 33, the housing side member 9B attached to the staircase attaching portion F2, and the bracket side member 9A and the housing side member 9B. Connecting shaft 9C. In addition, since the structure of the housing side member 9B and the connection shaft 9C is the same as the structure of the housing side member 8B and the connection shaft 8C of the center support 8 described above, detailed description thereof will be omitted.

  The bracket side member 9A is made of a plate-like member projecting from the node member 33 toward the stair mounting portion F2, and has a flat connection end 91a connected to the connection groove 33a (see FIG. 7) of the node member 33. And an insertion portion 91b inserted between the pair of holding portions 94, 94 of the housing side member 9B. At the tip end portion of the connection end portion 91a, unevenness that engages with the unevenness of the connection groove 33a (see FIG. 7) of the node member 33 is formed along the vertical direction. Further, a through hole 91c is formed in the insertion portion 91b, and a bolt 95 constituting the connecting shaft 9C is inserted into the through hole 91c.

<How to build stairs>
Next, the construction method of the staircase configured as described above will be described in detail. First, as shown in FIG. 3, the lower column main body 11 is erected and fixed to the lower floor staircase mounting portion F <b> 1 (see FIG. 1), and between the intermediate floor staircase mounting portion F <b> 2 and the column main body 11. The central support 8 is interposed, and the column main body 11 is fixed to the staircase attachment portion F2. In addition, in order to fix the column main body 11 to the staircase attachment portion F1 on the lower floor, the bolt B13 is inserted into the bolt insertion hole 13c of the support member 13 from the upper side, and the bolt B13 is screwed into an appropriate position of the staircase attachment portion. That's fine.

  Subsequently, the lower half of the connecting member 12 is inserted into the inner space 11f at the upper end of the lower column main body 11, and the shaft portion of the bolt B11 inserted into the insertion hole 11b of the lower column main body 11 is inserted into the female screw. The lower support body 11 and the connecting member 12 are fixed by screwing into the holes 12a. The connecting member 12 may be attached in advance in a factory or the like before the lower column main body 11 is erected, or may be attached after the lower column main body 11 is erected.

  Next, while inserting the upper half of the connecting member 12 into the inner space at the lower end of the upper column main body 11, the upper column main body 11 is erected on the upper end surface of the lower column main body 11, and the upper column The shaft portion of the bolt B11 inserted through the insertion hole 11b of the main body 11 is screwed into the female screw hole 12a, and the upper column main body 11 and the connecting member 12 are fixed. Moreover, as shown in FIG. 1, the center support 8 is interposed between the upper level staircase attaching part F3 and the upper column main body 11, and the column main body 11 is fixed to the staircase attaching part F3.

  Subsequently, as shown in FIG. 13, step plate units U, U,... Including a three-dimensional truss structure T and a tread plate 5 are attached to the outer peripheral surface of the column 1 (column body 11), The bracket 3 that supports the rear side of the tread plate 5 and the bracket 3 that supports the front side of the step plate 5 on the upper level (that is, the brackets 3 and 3 in the same vertical plane) are connected to each other. In order to connect the brackets 3 and 3 in the same vertical plane, as shown in FIG. 11, a columnar member 35 is interposed between the upper and lower adjacent node members 33 and 33, and the upper node member is connected. A handrail support column 6 is erected on the upper surface of 33, and a washer 36 for preventing the upper frame 31 and the like from coming out is applied to the lower surface of the lower node member 33, and then the lower node member from below the washer 36. The long bolt B31 is inserted into the bolt insertion hole 33b (see FIG. 7) 33, the bolt insertion hole (not shown) of the columnar member 35, and the bolt insertion hole 33b of the upper node member 33, and the tip of the handrail post 6 What is necessary is just to screw in the internal thread hole 63e formed in the insertion part 63c. In addition, the cap 37 which covers this is attached to the head of long volt | bolt B31.

  As shown in FIG. 13, the bracket 3 ′ for supporting the front side of the lowermost step board 5 of the lower staircase portion K1 is provided on the lower floor using the support piece 34 ′ connected to the node member 33 ′. As shown in FIG. 12, the bracket 3 that supports the rear side of the uppermost step board 5 of the lower staircase portion K1 is connected to the bracket side member 9A connected to the node member 33 and the intermediate floor as shown in FIG. The housing side member 9B fixed to the staircase attaching portion F2 is connected to the staircase attaching portion F2 on the intermediate floor by connecting via the connecting shaft 9C. Although not shown, the bracket 3 that supports the rear side of the uppermost step board 5 of the upper stair portion K2 (see FIG. 1) includes a bracket side member 9A connected to the node member 33 and the upper floor staircase. The housing side member 9B fixed to the mounting portion F3 is connected to the upper floor staircase mounting portion F3 by connecting via a connecting shaft 9C.

  As shown in FIG. 1, when the handrail 7 is attached to the upper ends of the handrail struts 6, 6... And the linear member 64 is inserted into the through hole 61 c (see FIG. 11) of the handrail 61, the present embodiment is concerned. The stairs are completed.

  The step board unit U shown in FIG. 13 may be assembled at the construction site, but if assembled in advance in a factory or the like, the work at the construction site becomes even easier. Further, the mounting order of the corrugated board unit U is preferably attached in order from the lower stage, but is not limited to this, and may be attached in order from the upper stage or from the middle stage.

  In this embodiment, the construction method in which the step board unit U in which the three-dimensional truss structure T and the tread board 5 are integrated in advance is fixed to the outer peripheral surface of the column 1 is illustrated. A construction method of fixing the tread plate 5 to the upper surface thereof after fixing to the outer peripheral surface of 1 may be adopted, and further, after fixing the plurality of bases 2, 2,. A construction method of connecting the upper frame 31 and the lower frame 32 to each base 2 may be adopted.

  According to the connection structure of the support column 1 according to the present embodiment configured as described above, as shown in FIG. 3, the connection member 12 in which the support column bodies 11 and 11 configuring the support column 1 are inserted into the inner space 11f. Since the connection member 12 is not exposed, the connection member 12 is not exposed, so that the appearance of the joint portion is clean. Further, as shown in FIG. 4A, since the connecting member 12 is disposed so as to straddle the boundary portion between the adjacent column main bodies 11 and 11, the bending moment and shearing are also present at this boundary portion (joint portion). Since the connecting member 12 is inserted into the inner space 11f (see FIG. 4B) of the column main body 11 in a state in which high resistance to force is exerted and relative rotation is not possible, Even high resistance.

  In the present embodiment, as shown in FIGS. 4B and 4C, the shaft portion of the bolt B11 inserted into the insertion hole 11b of the column main body 11 is screwed into the female screw hole 12a of the connecting member 12. By doing so, since the column main body 11 and the connecting member 12 are fixed, it is possible to reliably prevent the connecting member 12 from shifting in the vertical direction. Although a shearing force due to a torsional moment or the like acts on the bolt B11, the connecting member 12 is inserted into the inner space 11f of the column main body 11 in a state in which relative rotation is impossible. Compared to the case of joining, the magnitude of the shearing force borne by the bolt B11 is small.

  Further, as in this embodiment, if the angular pitch α of the plurality of recesses 11d, 11d,... Of the column main body 11 is made equal to the central angle β (see FIG. 10) of the tread 5, it is adjacent in the vertical direction. Since it becomes possible to rotate the joining position of the column main bodies 11 and 11 (that is, the bonding position of the column main body 11 and the connecting member 12) in the circumferential direction at an angular pitch equal to the central angle β of the tread plate 5, It is possible to regularly arrange the plurality of treads 5, 5,.

  Further, according to the stairs according to the present embodiment, as shown in FIG. 2, since the tread plate 5 is supported by the three-dimensional truss structure T, it is possible to give a light impression to the viewer. Moreover, according to this staircase, since the bracket 3 that supports the front side of the upper step board 5 is arranged in the vertical plane including the bracket 3 that supports the rear side of the step board 5, it has a clean appearance. In addition, a harmonious and stable appearance can be realized. Note that the three-dimensional truss structure T configured by combining elongated members (the upper frame 31 and the lower frame 32) has high bending rigidity, and thus can stably support the tread plate 5.

  Furthermore, in this embodiment, as shown in FIG. 2, the tip of the upper frame 31 and the tip of the lower frame 32 are connected via a node member 33, and the node members 33, 33 that are vertically adjacent to each other are connected. Since they are connected to each other via the columnar members 35, the load acting on the one tread 5 is dispersed in the brackets 3 that support the treads 5 above and below. That is, according to the staircase according to the present embodiment, the upper frame 31 and the like can be made lighter than in the case where the node members 33 that are vertically adjacent to each other are not connected.

  In addition, in the present embodiment, the node members 33 that are vertically adjacent to each other are connected to each other via the columnar member 35, so that it is not necessary to prepare the bracket 3 for each kicking height. In other words, when the bracket 3 manufactured according to the height of one staircase is used for another staircase having a different height, only the height of the columnar member 35 needs to be changed. It can be used in common for stairs with different kick heights.

  Furthermore, in the staircase according to the present embodiment, as shown in FIG. 10, the support piece 34 is connected to the node member 33 and the tip portion of the tread plate 5 is fixed to the upper surface of the support piece 34. Even after the vertically adjacent node members 33 and 33 are connected, the tread plate 5 can be fixed or the tread plate 5 can be removed.

  In the staircase according to the present embodiment, the base 2, the pair of brackets 3 and 3, and the connecting frame 4 form a three-dimensional truss structure T, and the three-dimensional truss structure T and the tread 5 are connected to each other. Since the integrated corrugated plate unit U is configured (see FIG. 13), it is possible to simplify the assembling work. Moreover, since it is not necessary to attach the step board unit U in order from the lower stage, it becomes difficult to limit the construction order. Further, after the construction of the stairs, it is possible to remove only the step board unit U for one step of the tread board. This makes it easier to maintain and replace parts.

  Further, in the stairs according to the present embodiment, as shown in FIG. 11, the handrail support column 6 is erected on the upper surface of the node member 33, and the node members 33, 33 adjacent to each other in the vertical direction and the handrail support column 6 are aligned. Because it is arranged, the appearance of the staircase is neat.

  In the present embodiment, the stairs from the first floor to the third floor are illustrated, but this is not intended to limit the number of floors on which the stairs according to the present invention are installed. The staircase according to the present invention can be used as, for example, a staircase from the first floor to the second floor through the middle second floor, a staircase from the basement floor to the ground floor, a staircase to the rooftop, or the like. Further, the configuration of the staircase described above is not limited to the illustrated one, and may be changed as appropriate. For example, in the present embodiment, the upper and lower column main bodies 11 and 11 are joined at the boundary between the lower staircase portion K1 and the upper staircase portion K2 (see FIG. 3), but the present invention is not limited to this. The support main bodies 11 and 11 may be joined at the position. Moreover, in this embodiment, although the support | pillar 1 was comprised by the two support | pillar main bodies 11 and 11, the support | pillar 1 may be comprised by the three or more support | pillar main bodies 11. FIG.

  Furthermore, in this embodiment, while forming several recessed part 11d, 11d, ... in the internal peripheral surface of the support | pillar main body 11, several convex part 12b, 12b, which engages with the recessed part 11d in the outer peripheral surface of the connection member 12 is provided. Although the relative rotation of the column main body 11 and the connecting member 12 is made impossible by forming (...) (see (b) and (c) of FIG. 4), the present invention is not limited to this, but the illustration is omitted. The inner space of the column main body 11 may be formed into an n-shaped cross section, and the outer shape of the connecting member 12 may be formed into an n-shaped cross section, thereby disabling the relative rotation of the column main body 11 and the connecting member 12. In this case, the value of 360 ° / n may be set equal to the central angle β (see FIG. 10) of the tread board 5.

  Moreover, in the above-described embodiment, the configuration in which the base ends of the brackets 3 and 3 at the same height are connected to each other via the base 2 is illustrated. For example, as in the modification illustrated in FIG. You may connect the base ends of the brackets 30 and 30 adjacent up and down via the vertically long base 20. FIG. In other words, a structure in which a pair of brackets 30 and 30 adjacent to each other in the upper and lower sides and the base 20 constitute a flat truss structure T ′ and this flat truss structure T ′ is fixed to the outer peripheral surface of the column 1 is adopted. May be. That is, the base ends of a pair of brackets 30, 30 in the same vertical plane may be connected via the base 20.

  Here, the base 20 is composed of a vertically long member attached to the outer peripheral surface of the column main body 11, and the contact surface with the column main body 11 side is formed according to the shape of the outer peripheral surface of the column main body 11. Further, a connecting groove 22a is formed in the vertical direction on the surface of the base 20 opposite to the column main body 11. A bolt insertion hole (not shown) is formed on both sides of the connecting groove 22a of the base 20, and a countersunk bolt (not shown) with a hexagonal hole is inserted into the bolt insertion hole. The base 20 is fixed to the outer peripheral surface of the column main body 11 by being screwed into a female screw hole (not shown).

  Further, in the modification shown in FIG. 14, of the pair of brackets 30, 30 constituting the planar truss structure T ′, the lower bracket 30 includes the tip of the upper frame 31 ′ and the lower frame. The tip of 32 is connected via the above-described node member 33, but for the bracket 30 on the upper side, the tip of the upper frame 31 ′ and the tip of the lower frame 32 are longer than the node member 33. It is connected via a member 33 ′ (same as shown in FIG. 9). In the modification shown in FIG. 14, the node member 33 'of the bracket 30 on the upper side and the node member 33 of the bracket 30 on the lower side are directly connected.

  Here, on the upper part of the upper frame 31 ′, a tread board support portion 31 b on which the tread board 5 is placed is formed. The tread board support portion 31 b has a top surface that is horizontal and abuts against the bottom surface of the tread board 5. The upper frame 31 'is obtained by processing a hollow extruded shape made of an aluminum alloy having a cross section shown in FIG.

  As described above, when a pair of brackets 30, 30 adjacent to each other in the vertical direction are integrated to form a planar unit (planar truss structure T ′), it is possible to easily and quickly perform on-site assembly work. Furthermore, since the unit is flat, it is possible to transport and store a plurality of units in a stacked state.

  In addition, when the node members 33 and 33 ′ adjacent to each other are connected to each other via the connection frame 4, the brackets 30 and 30 adjacent to the front and back and the connection frame 4 are similar to the three-dimensional truss structure T shown in FIG. 2. Since the three-dimensional truss structure is formed, the tread plate 5 can be stably supported.

  In the stairs according to the present embodiment, a plurality of linear members 64 are arranged so as to sew a plurality of handrail struts 6, 6,... A panel may be disposed between the columns 6 and 6. In addition, about a panel, in addition to the board | plate material which has translucency, such as an acryl, it can comprise with the board | plate material which does not have translucency, such as a wooden board | plate material and the product made from aluminum alloy. Although not shown, one or more handrail struts may be further disposed between the handrail struts 6 and 6.

<Modification>
In the above-described embodiment, the configuration in which the column main body 11 of the upper staircase portion K2 and the uppermost bracket 3 are directly fixed to the staircase mounting portion F3 is illustrated, but it is shown in FIGS. 16 (a) and 16 (b). The structure fixed to the staircase attaching part F3 of an upper floor indirectly via the landing L may be sufficient like the modification of this embodiment.

  As shown in FIG. 16 (b), the dance hall L includes a support structure 100 based on a truss structure, a pair of base materials 200 and 200 fixed to the upper surface of the support structure 100, and the base material. 200 and 200, a landing plate 300 for landings and a handrail unit 400 for landings are provided.

  17A is a cross-sectional view taken along the line X2-X2 of FIG. 16B. As shown in FIG. 17, the support structure 100 is interposed between the support column 1 and the staircase attachment portion F3. The inner truss 110, the outer truss 120 interposed between the tip end portion (outer edge portion) of the uppermost bracket 3 and the stair mounting portion F2, the front side of the inner truss 110 and the front side of the outer truss 120 A pair of upper and lower front connection frames 131 and 131 (see FIG. 18A) to be connected, a rear connection frame 132 for connecting the rear side of the inner truss 110 and the rear side of the outer truss 120, and the inner truss 110 A first diagonal frame 133 that connects the front side and the rear side of the outer truss 120, and a second diagonal frame 13 that connects the rear side of the inner truss 110 and the front side of the outer truss 120 below the first diagonal frame 133. It is equipped with a door.

  As shown in FIG. 16B, the inner truss 110 includes a first frame 111 arranged horizontally, a second frame 112 arranged obliquely below the first frame 111, and a first frame 111. A long front node member 113 that connects the front end (end portion on the support column 1 side) and the front end of the second frame 112, the rear end (end portion on the staircase mounting portion F3 side) of the first frame 111, and the second end. A short rear node member 114 that connects the rear end of the frame 112 and has a triangular shape in a side view.

  Here, since the configuration of the first frame 111 and the second frame 112 is the same as that of the upper frame 31 and the lower frame 32 shown in FIG. 6A, detailed description thereof will be omitted. Further, since the configuration of the front node member 113 is the same as that of the node member 33 ′ shown in FIG. 9, the detailed description thereof is omitted, and the configuration of the rear node member 114 is the same as that of the node member 33 shown in FIG. Therefore, detailed description thereof is omitted.

  Further, since the configuration of the outer truss 120 is the same as that of the inner truss 110, a detailed description thereof will be omitted.

  As shown in FIG. 17A, the front connection frame 131 connects the front node member 113 of the inner truss 110 and the front node member 123 of the outer truss 120, and is arranged horizontally. Of the pair of upper and lower front connection frames 131 and 131 (see FIG. 18A), the upper front connection frame 131 is a plane including the first frame 111 of the inner truss 110 and the first frame 121 of the outer truss 120. Further, as shown in FIG. 18A, the lower front connection frame 131 is disposed in a vertical plane including the upper front connection frame 131. The configuration of the front connection frame 131 is the same as that of the connection frame 4 shown in FIG.

  As shown in FIG. 18B, the rear connection frame 132 connects the rear node member 114 of the inner truss 110 and the rear node member 124 of the outer truss 120, and is disposed horizontally. ing. As shown in FIG. 17A, the rear connection frame 132 is arranged in a plane (horizontal plane) including the first frame 111 of the inner truss 110 and the first frame 121 of the outer truss 120. The configuration of the rear connection frame 132 is the same as that of the connection frame 4 shown in FIG.

  As shown in FIG. 17A, the first diagonal frame 133 connects the front node member 113 of the inner truss 110 and the rear node member 124 of the outer truss 120. In the present embodiment, It is arranged in a plane (horizontal plane) including the first frame 111 of the inner truss 110 and the first frame 121 of the outer truss 120. The configuration of the first diagonal frame 133 is the same as that of the connection frame 4 shown in FIG.

  As shown in FIG. 17B, the second oblique frame 134 connects the rear node member 114 of the inner truss 110 and the front node member 123 of the outer truss 120. In the present embodiment, The second frame 112 of the inner truss 110 and the second frame 122 of the outer truss 120 are arranged in a plane.

  The support structure 100 may be assembled according to the method for assembling the three-dimensional truss structure T described above.

  As shown in FIG. 17A, a first inner support 140 is interposed between the front side of the inner truss 110 and the outer peripheral surface of the support column 1. A second inner bearing 150 is interposed between the second inner support 150 and F3. Further, a first outer support 160 is interposed between the front side of the outer truss 120 and the bracket 3, and a second outer support 170 is provided between the rear side of the outer truss 120 and the stair attachment portion F <b> 3. Is installed. Furthermore, auxiliary supports 180 and 180 are interposed between the front side and the rear side of the outer truss 120 between the second staircase attachment portion F3 'orthogonal to the staircase attachment portion F3.

  As shown in FIG. 19A, the first inner bearing 140 includes a column side member 141 that is attached to the outer peripheral surface of the column 1, a truss side member 142 that is attached to the front node member 113 of the inner truss 110, and a column. The connecting shaft 143 connects the side member 141 and the truss side member 142. The truss side member 142 has a flat connection end 142a and a U-shaped bifurcated portion 142b protruding from the connection end 142a. The connecting end 142a can be fitted into a connecting groove (similar to the connecting groove 33a shown in FIG. 7) of the front node member 113, and the front end of the connecting end 142a is engaged with the unevenness of the connecting groove. Concavities and convexities to be formed are formed along the vertical direction. Further, the protruding portion 141a of the support column side member 141 is inserted into the bifurcated portion 142b. In addition, since the structure of the support | pillar side member 141 and the connection shaft 143 is the same as that of the support | pillar side member 8A and connection shaft 8C shown in FIG. 3, the detailed description is abbreviate | omitted.

  As shown in FIG. 19B, the second inner bearing 150 includes a truss side member 151 attached to the rear node member 114 of the inner truss 110, a housing side member 152 attached to the staircase attaching portion F3, a truss It comprises a connecting shaft 153 that connects the side member 151 and the housing side member 152. Note that the configurations of the truss side member 151, the housing side member 152, and the connecting shaft 153 are the same as those of the bracket side member 9A, the housing side member 9B, and the connecting shaft 9C shown in FIG. To do.

  As shown in FIG. 19C, the first outer support 160 includes a bracket side member 161 attached to the node member 33 of the bracket 3, a truss side member 162 attached to the front node member 123 of the outer truss 120, It comprises a connecting shaft 163 that connects the bracket side member 161 and the truss side member 162. The configurations of the bracket side member 161 and the connecting shaft 163 are the same as those of the bracket side member 9A and the connecting shaft 9C shown in FIG. 12, respectively, and the configuration of the truss side member 162 is the truss side shown in FIG. Since it is the same as that of the member 142, the detailed description is abbreviate | omitted.

  Moreover, since the structure of the 2nd outer side bearing 170 and the auxiliary bearing 180 shown to Fig.17 (a) is the same as that of the 2nd inner side bearing 150, the detailed description is abbreviate | omitted.

  A base material 200 shown in FIG. 16B is formed of a shape having a cross-sectional hat shape in the modification of the present embodiment. In the modification of the present embodiment, a pair of front and rear base materials 200, 200 are arranged on the upper surface of the support structure 100, but the base material 200 on the front side (the column 1 side in FIG. 16B) is As shown in FIG. 18 (a), it is installed between the front node member 113 of the inner truss 110 and the front node member 123 of the outer truss 120, and is attached to the rear side (in the step (b) of FIG. 16). As shown in FIG. 18B, the base material 200 on the part F3 side is provided between the rear node member 114 of the inner truss 110 and the rear node member 124 of the outer truss 120.

  As shown in FIG. 16A, the landing plate 300 is made of a plate material having a rectangular shape in plan view, and is grounded by screws screwed from the flange portion of the ground material 200 (see FIG. 16B). It is fixed to the upper surface of the material 200.

  The landing handrail unit 400 is disposed along the inner truss 110, and the first handrail struts 6 ′ and 6 ′ that are erected in the concave groove of the base material 200 through the landing foot plate 300, A plurality of second handrail struts 6 ", 6" erected on the upper surface of the landing plate 300 between the first handrail struts 6 ', 6', the first handrail strut 6 'and the second handrail And a horizontal handrail 7 ′ arranged so as to connect the upper ends of the columns 6 ″.

  Here, the configuration of the first handrail post 6 'is the same as that of the handrail post 6 shown in FIG. 11, and thus detailed description thereof is omitted. Note that the first handrail post 6 ′ is the same as the long bolt (not shown) that is inserted from the lower side of the front node member 113 (or the rear node member 114) of the inner truss 110 (the long bolt B 31 shown in FIG. 11). Are fixed to the front node member 113 (or the rear node member 114) together with the base material 200.

  Incidentally, the second handrail post 6 ″ is fixed to the upper surface of the landing plate 300 by a tapping screw (not shown) screwed from the lower side of the landing plate 300.

  Thus, when the landing L is interposed between the uppermost step of the stairs and the staircase mounting portion F3 on the upper floor, the shape of the staircase mounting portion F3 (or the second staircase mounting portion F3 ′) and the staircase mounting portion F3 Even when the positional relationship with the support column 1 is different for each building, it is possible to flexibly cope with it. Moreover, according to the landing L, since the support structure 100 is based on the truss structure, it is possible to maintain a clean appearance in harmony with the stairs according to the present embodiment based on the truss structure. It becomes. In addition, the landing stadium L is lightweight and strong because the support structure 100 is based on a truss structure.

  As shown in FIG. 16 (b), in the landing L according to this modification, the landing plate 300 for the landing is located above the top plate 5 at the top of the staircase and the height of the upper surface is higher. However, the present invention is not limited to this, and is not limited to this. Although illustration is omitted, depending on the height of the floor and the connection with the stair mounting portion F3, the upper surface of the landing plate 300 for the dance hall may be You may install so that it may become the same height as the upper surface of the uppermost step board 5 of staircase part K2 (refer FIG. 1), or install it so that it may become the same height as the floor of an upper floor. Good.

  Moreover, although illustration is abbreviate | omitted, of course, it does not interfere even if the support | pillar main body 11 of the lower staircase part K1 and the uppermost bracket 3 are indirectly fixed to the staircase attaching part F2 of an intermediate floor via a landing.

It is a perspective view which shows the connection structure of the staircase support | pillar which concerns on this embodiment. It is an expansion perspective view for demonstrating the structure which supports a tread. It is a disassembled perspective view for demonstrating the structure of a staircase support | pillar. (A) is side sectional drawing for demonstrating the structure of a staircase support | pillar, (b) is a figure for demonstrating a support | pillar main body, (a) Z1-Z1 sectional view taken on the line, (c) is a connection member. It is a figure for demonstrating, and it is the Z1-Z1 sectional view taken on the line of (a). (A) is a perspective view which shows a base, (b) is a top view of a base. (A) is a front view showing a bracket, (b) is a perspective view for explaining a connection method between an upper frame and a node member, and (c) is a perspective view for explaining a connection method between the upper frame and a base. It is. It is a perspective view which shows a nodal member. It is a perspective view which shows a support piece. It is an expansion perspective view which shows the lowermost bracket. It is a perspective view for demonstrating the attachment method of a tread board. (A) is a disassembled perspective view for demonstrating the structure of a handrail support | pillar, (b) is an enlarged perspective view of a handrail, (c) is an enlarged perspective view of a lower connection member. It is a disassembled perspective view for demonstrating the structure of a side part support. It is a disassembled perspective view for demonstrating the construction method of stairs. It is a disassembled perspective view for demonstrating the modification of the structure which supports a tread board. It is sectional drawing which shows the modification of an upper frame. (A) is a top view which shows the modification of the staircase which concerns on this embodiment, (b) is X1-X1 sectional view taken on the line of (a). (A) is the X2-X2 sectional view taken on the line of (b) of FIG. 16, (b) is the X3-X3 sectional view taken on the line of (b) of FIG. (A) is the X4-X4 sectional view taken on the line of (b) of FIG. 16, (b) is the X5-X5 sectional view taken on the line of (b) of FIG. 17A is an enlarged view of the Y1 portion of FIG. 17A, FIG. 17B is an enlarged view of the Y2 portion of FIG. 17A, and FIG. 17C is an enlarged view of the Y3 portion of FIG. It is.

Explanation of symbols

1 strut (stair strut)
DESCRIPTION OF SYMBOLS 11 Prop body 11b Insertion hole 11d Concave part 12 Connection member 12a Female screw hole 12b Protrusion part 2 Base 3 Bracket 4 Connection frame 5 Tread board 6 Handrail support pillar 7 Handrail

Claims (5)

A connecting structure of staircase columns supporting a plurality of treads arranged in a spiral,
A plurality of support columns that are arranged in a vertical direction, and a connecting member that connects the adjacent support columns,
The column main body is formed into a tubular shape,
The connection structure of the stair column, wherein the connection member is inserted into the inner space of each of the adjacent column main bodies so as not to be relatively rotatable. On the inner peripheral surface of the column main body, a plurality of recesses are arranged at equal intervals in the circumferential direction,
2. The staircase strut connection structure according to claim 1, wherein a plurality of protrusions that engage with the recesses are arranged on the outer peripheral surface of the connection member at equal intervals in the circumferential direction.   3. The staircase strut connection structure according to claim 1, wherein an angle pitch of the plurality of concave portions of the strut body is equal to a center angle of the tread. The column main body is formed with an insertion hole communicating with the inner space,
The connecting member is formed with a female screw hole at a position corresponding to the insertion hole,
4. The column main body and the connecting member are fixed by screwing a shaft portion of a bolt inserted through the insertion hole into the female screw hole. The connecting structure of the stair column according to one item.   The stair column support structure according to any one of claims 1 to 4, wherein the column main body and the connection member are made of an extruded shape made of an aluminum alloy.

Images