JP4855434B2 - Staircase - Google Patents

Description

  The present invention relates to a staircase, and more specifically, n central pillars are erected so as to be located at each apex of an n-gon, and a spar is placed so as to spiral around the outside of the n central pillars. It is related to the stairs which provided the step board in this sasara girder.

Conventionally, various spiral staircases have been provided. Many of them are disclosed in the following Patent Document 1, and a plurality of steel treads are provided around one steel center column. Are supported in a cantilevered state while being arranged in a spiral shape.
In addition, the following patent document 2 discloses a wooden spiral staircase.
Further, Patent Document 3 below discloses a spiral staircase having a triangular shape in plan view.
JP 2003-239484 A JP 2005-325622 A JP-A-10-183987

However, in a structure in which a plurality of treads are supported in a cantilevered manner around one central pillar, high strength is required for the central pillars and the treads in order to provide sufficient strength, which is practical. In view of cost and design, the usable materials are limited to steel materials, for example.
Therefore, the present invention erected n central pillars from 1 to n so as to be positioned at each apex of the n-gon (n ≧ 3) when viewed in plan, The lower horizontal girder is fixed so that it spans any two of the central pillars, and is positioned higher than the lower horizontal girder. The upper horizontal girder is fixed so as not to be located on the line, but to be spanned to any two of the n central pillars, and further to the lower horizontal girder and the upper horizontal girder. An object of the present invention is to provide a spiral staircase that can widen the selection of materials by fixing the spar and supporting the tread on the spar.

(First invention)
The first invention relates to a staircase, and is arranged and erected so as to be positioned at each vertex of an n-gon (n is an integer of 3 or more) when viewed in plan. n center pillars up to n are spanned across any two of the n central pillars so that they are horizontal and at least one end protrudes outside the n-gon. The lower horizontal girder is fixed so that it is higher than the lower horizontal girder, and when viewed in plan, the lower horizontal girder is not located on the same straight line and is horizontal. And an upper horizontal beam and a lower horizontal beam fixed so as to be bridged over any two of the n central pillars so that at least one end protrudes outside the n-gon. n-square shape at the outer horizontal girder and upper horizontal girder Characterized in that it comprises a sasara digit is fixed so as to be stretched jumped out the outer portion, and a footplate 41 which is fixedly supported on sasara digits.

Here, in the staircase according to the present invention, n central pillars are erected so as to be located at each apex of the n-gon, and the spar is placed so as to spiral around the outside of the n central pillars. The tread plate 41 is provided on this further girder.
The “central pillar” is a pillar erected at the central portion of the spiral staircase.
In the present invention, n central pillars from 1 to n are erected at the central portion of the spiral staircase. In the present invention, “n” means an integer of 3 or more. The n central pillars are erected at the center of the spiral staircase, but are not erected so as to be bundled at one place, and are erected side by side in a straight line. Not a thing. The n central pillars are erected so as to be positioned at the respective apexes of the n-gon. That is, the n central pillars are erected with a predetermined interval, and are arranged so as to form an n-gon when adjacent central pillars are connected by a line.

Also, for example, n = 3. That is, three central pillars from the first to the third can be provided. In this case, the three central pillars from the first to the third are erected so as to be positioned at the respective apexes of the triangle.
Also, for example, n = 4. That is, four central pillars from the first to the fourth can be provided. In this case, the four central pillars from the first to the fourth are erected so as to be positioned at each vertex of the quadrangle.
For example, it can be set as n = 5. That is, five central pillars from the first to the fifth can be provided. In this case, the five central pillars from the first to the fifth are erected so as to be positioned at the respective apexes of the pentagon.

Of course, it is possible to satisfy n ≧ 6. That is, n can be 6 or more.
The “lower horizontal girder” is a member for supporting the spar girder and is fixed so as to be bridged over any two of the n central pillars. Further, the lower horizontal girder is fixed to the two central pillars so as to be horizontal. The lower horizontal girders are fixed to the two central pillars so that at least one end protrudes outside the n-gon.
Further, the “upper horizontal girder” is a member for supporting the spar girder and is fixed so as to be bridged over any two of the n central pillars. Further, the upper horizontal girders are fixed to the two central pillars so as to be higher than the lower horizontal girders. Further, the upper horizontal girders are fixed to the two central pillars so that they are not located on the same straight line as the lower horizontal girders when viewed in plan. That is, the upper horizontal girders are fixed to the two central pillars so as to intersect the lower horizontal girders in the vicinity of one of the central pillars when viewed in plan. Further, the upper horizontal girder is fixed to the two central pillars so as to be horizontal. Further, the upper horizontal girders are fixed to the two central pillars so that at least one end protrudes outside the n-gon.

Further, for both the lower horizontal girder and the upper horizontal girder, it is only necessary to fix the two central pillars so that at least one end protrudes outside the n-gon, and therefore both end portions are You may fix to two center pillars so that it may protrude to the outer side of n square.
Further, as described above, the n central pillars are erected so as to be positioned at the respective apexes of the n-gon, and an n-gon can be formed by connecting adjacent central pillars with a line. However, “so that it jumps out of the n-gon” means that it pops out of the n-gon that is formed when the n central pillars are connected by a line. is there.
Further, the “sara girders” are members for supporting the tread 41, and are bridged over a portion that protrudes outside the n-gon in the lower horizontal girder and a portion that protrudes outside the n-gon in the upper horizontal girder. In this way, it is fixed.

In other words, the sagger is supported and fixed at a position outside the n-gon by supporting one end at the lower horizontal girder and the other end at the upper horizontal girder. In addition, the upper horizontal girder is higher than the lower horizontal girder and, when viewed in plan, is not located on the same straight line as the lower horizontal girder. It is inclined obliquely so that its height gradually increases, and is spanned, supported and fixed on the lower horizontal girders and upper horizontal girders.
Then, the “step board 41” is supported and fixed to the sasara girders. Further, a plurality of footboards 41 can be supported and fixed to the scabbard.
The load applied to the tread plate 41 is first transmitted to the spar, and the load transmitted to the spar is transmitted to the lower horizontal girder and the upper horizontal girder. In addition, the load transmitted to the lower horizontal girder is transmitted to any two of the n central pillars, and the load transmitted to the upper horizontal girder is also applied to any two of the n central pillars. It is transmitted. The load applied to the footboard 41 is thus dispersed.

Thus, according to the present invention, the first to n-th central pillars are erected so as to be positioned at the respective apexes of the n-gon (n ≧ 3), The lower horizontal girder is fixed so that it spans any two of the central pillars, and is positioned higher than the lower horizontal girder, and on the same straight line as the lower horizontal girder in plan view. The upper horizontal girder is fixed so that it is bridged over any two of the n pillars while not being positioned, and is further bridged over the lower horizontal girder and the upper horizontal girder. Since the tread 41 is supported by the spar girders, it is possible to provide a spiral staircase that exhibits sufficient strength even when made of wood.
(Second invention)
A second invention relates to a staircase, and includes three central pillars from first to third that are arranged and erected so as to be positioned at respective vertices of a triangle when viewed in plan, The first central column 11 and the second central column 12 are fixed so as to be horizontal and at least the end on the second central column 12 side protrudes outside the triangle. Lower horizontal girder, first central column so that it is positioned higher than the lower horizontal column and is horizontal, and at least the end on the third central column 13 side protrudes outside the triangle The upper horizontal girder fixed so as to be bridged over 11 and the third central column 13, the portion protruding from the second central column 12 side of the lower horizontal beam to the outside of the triangle, and the third central column in the upper horizontal column It will be bridged over the part that protrudes from the 13th side to the outside of the triangle And a tread plate 41 that is supported and fixed by the counter girder.

Here, the staircase according to the present invention is “n = 3” in the first invention.
In the present invention, the three central pillars of the first central pillar 11, the second central pillar 12, and the third central pillar 13 are erected at the center of the spiral staircase. Further, the three central pillars are erected so as to be positioned at the respective apexes of the triangle. Further, the first central pillar 11, the second central pillar 12, and the third central pillar 13 may be arranged so as to be clockwise in this order when viewed in plan, and conversely, counterclockwise in this order. You may arrange so that.
In addition, the “lower horizontal girder” is spanned over the first central column 11 and the second central column 12 so that it is horizontal and at least the end on the second central column 12 side protrudes outside the triangle. It is a member fixed as described above. That is, the lower horizontal girders are fixed to the first central pillar 11 and the second central pillar 12 so as to be horizontal. The lower horizontal girders are fixed to the first central column 11 and the second central column 12 so that at least the end portion on the second central column 12 side protrudes outside the triangle.

  The “upper horizontal girder” is the first center so that it is higher than the lower horizontal girder and is horizontal, and at least the end on the third central pillar 13 side protrudes outside the triangle. This is a member fixed so as to be bridged between the pillar 11 and the third central pillar 13. That is, the upper horizontal beam is fixed to the first central column 11 and the third central column 13 so as to be higher than the lower horizontal beam. The upper horizontal girders are fixed to the first central column 11 and the third central column 13 so as to be horizontal. The upper horizontal girders are fixed to the first central column 11 and the third central column 13 so that at least the end portion on the third central column 13 side protrudes outside the triangle. The lower horizontal girder is fixed to the first central column 11 and the second central column 12, while the upper horizontal girder is fixed to the first central column 11 and the third central column 13, so A horizontal girder is not located on the same straight line when viewed in plan. That is, the lower horizontal girder and the upper horizontal girder appear to intersect in the vicinity of the first central pillar 11 when viewed in plan.

The lower horizontal girder is fixed so as to be bridged between the first central column 11 and the second central column 12, but in the lower horizontal girder, “the end on the second central column 12 side is a triangle. “Jump out to the outside” means that the end portion of the lower horizontal girder on the second central column 12 side extends beyond the second central column 12 and jumps out of the triangle. The same applies to “the end on the third central pillar 13 side protrudes outside the triangle” in the upper horizontal beam.
In addition, for both the lower horizontal girder and the upper horizontal girder, it is only necessary to fix the two central pillars so that at least the end portion on the above-mentioned side protrudes to the outside of the triangle. It may be fixed to two central pillars so as to jump out of the triangle.

“Sasara girder” is a member for supporting the tread 41, a portion protruding from the second central pillar 12 side of the lower horizontal girder to the outside of the triangle, and the third central pillar 13 side of the upper horizontal girder. It is a member fixed so that it may be bridged over the part which protruded from the triangle to the outer side.
That is, at the position outside the triangle, the saddle beam is at one end protruding from the second central column 12 side in the lower horizontal beam and the other end is protruding from the third central column 13 side at the upper horizontal beam. These are each supported and fixed. In addition, the upper horizontal girder is higher than the lower horizontal girder and, when viewed in plan, is not located on the same straight line as the lower horizontal girder (crosses the lower horizontal girder in the vicinity of the first central pillar 11). Looks). For this reason, the sagittal girder is inclined obliquely so that the height gradually increases from one end to the other end, is spanned over the lower horizontal girder and the upper horizontal girder, is supported and fixed.

Then, the “step board 41” is supported and fixed to the sasara girders. Further, a plurality of footboards 41 can be supported and fixed to the scabbard.
The load applied to the tread plate 41 is first transmitted to the saddle girder that supports the tread plate 41, and the load transmitted to the counter girder is transmitted to the lower horizontal girder and the upper horizontal girder that support the tread plate. The load transmitted to the lower horizontal girder is transmitted to the first central column 11 and the second central column 12 that support the lower horizontal girder, and the load transmitted to the upper horizontal girder also supports the upper horizontal girder. It is transmitted to the first central pillar 11 and the third central pillar 13. The load applied to the footboard 41 is thus dispersed.
Thus, according to the present invention, the first to third three central pillars are erected so as to be positioned at the respective vertices of the triangle, and the first central pillar 11 and the second central pillar are arranged. The lower horizontal girder is fixed so as to cross over 12, and the upper horizontal girder is fixed so as to cross over the first central pillar 11 and the third central pillar 13 at a position higher than the lower horizontal girder. In addition, the bridge is fixed to the lower and upper horizontal girders, and the tread 41 is supported by the girders. Can provide a staircase.

(Third invention)
A third invention relates to a staircase, and includes three central pillars from first to third that are arranged and erected so as to be located at respective vertices of a triangle when viewed in plan, It is fixed so as to be bridged between the second central column 12 and the third central column 13 so that it is horizontal and at least the end on the second central column 12 side protrudes outside the triangle. Lower horizontal girder, so as to be higher than the horizontal horizontal girder by approximately the same dimension as the kick-up dimension, and to be horizontal and at least the end on the second central pillar 12 side is outside the triangle The upper horizontal girder that is fixed so as to be bridged over the first central column 11 and the second central column 12 and the portion that protrudes from the second central column 12 side to the outside of the triangle. And from the second central pillar 12 side to the outside of the triangle in the upper horizontal girder It has a saddle girder that is fixed so as to be bridged over the protruding part, and a tread 41 that is supported and fixed by the girder, and this tread 41 is sized from the lower horizontal girder to the upper horizontal girder. It is formed and is a landing site.

In the present invention, the “lower horizontal girders” are formed on the second central column 12 and the third central column 13 so that they are horizontal and at least the end on the second central column 12 side protrudes outside the triangle. It is fixed so that it can be bridged. That is, in the present invention, the lower horizontal girder is fixed to the second central column 12 and the third central column 13 so that at least the end portion on the second central column 12 side protrudes outside the triangle.
In the present invention, the “upper horizontal girder” is positioned so as to be higher than the lower horizontal girder by a dimension substantially equal to the dimension of the kick-up, and to be horizontal, and at least the second central column 12. It is fixed so that it may span over the 1st center pillar 11 and the 2nd center pillar 12 so that the edge part of the side may jump out of the triangle. That is, in the present invention, the upper horizontal girder is fixed at a position higher than the lower horizontal girder by a dimension substantially equal to the dimension of the kick-up. That is, the height difference between the lower horizontal girder and the upper horizontal girder is set to a dimension substantially equal to the dimension of the kick-up. In the present invention, the upper horizontal girder is also fixed to the first central column 11 and the second central column 12 so that at least the end portion on the second central column 12 side protrudes outside the triangle.

  For this reason, in the present invention, the lower horizontal beam and the upper horizontal beam intersect each other in the vicinity of the second central pillar 12 when viewed in plan. Further, the lower horizontal girder extends beyond the second central column 12 along the extension line of the second central column 12 to the third central column 13, and the upper horizontal girder is the first central column 11. -It extends beyond the second central pillar 12 along the extension of the second central pillar 12 line. Further, the saddle beam is fixed to a protruding portion from the second central column 12 side in the lower horizontal beam and a protruding portion from the second central column 12 side in the upper horizontal beam. Accordingly, a triangle is formed by the protruding portion from the second central column 12 side in the lower horizontal girder, the protruding portion from the second central column 12 side in the upper horizontal beam, and the spar.

In the present invention, the “tread board 41” is supported and fixed to the further girder and is formed in a size from the lower horizontal girder to the upper horizontal girder. It functions as a landing because it is formed so as to block the triangle that is formed from the second central pillar 12 side of the girder, the protruding part from the second central pillar 12 side of the upper horizontal girder, and the further girder. .
The “second central column 12—the third central column 13 line” means a line connecting the second central column 12 and the third central column 13, and “the first central column 11— The “second central pillar 12 line” means a line connecting the first central pillar 11 and the second central pillar 12.

  According to the present invention, the first to n-th central pillars are erected so as to be positioned at the respective apexes of the n-gon (n ≧ 3) when viewed in plan, and n The lower horizontal girder is fixed so that it spans any two of the central pillars, and is positioned higher than the lower horizontal girder. The upper horizontal girder is fixed so as not to be located on the line, but to be spanned to any two of the n central pillars, and further to the lower horizontal girder and the upper horizontal girder. Because the spar is fixed and the tread is supported by the spar, it is possible to provide a spiral staircase with a wide selection of materials. Specifically, for example, it is possible to provide a spiral staircase that exhibits sufficient strength even with wood.

(Explanation of drawings)
1 to 5 are overall perspective views of the stairs according to the present embodiment, and FIGS. 6 to 13 are partially enlarged perspective views of the stairs according to the present embodiment.
(Stairs)
As shown in FIGS. 1 to 13, the staircase according to the present embodiment has three central pillars standing up so as to be located at each vertex of a triangle, and the outside of these three central pillars is spiral. As shown in the figure, a counter girder is provided and a tread plate 41 is provided on the counter girder.
Specifically, as shown in FIGS. 1 to 13, the staircase according to the present embodiment is arranged and erected so as to be positioned at each vertex of a triangle when viewed in plan. A central pillar 11, a second central pillar 12, and a third central pillar 13 are provided.

In addition, the staircase according to the present embodiment is extended over the second central column 12 and the third central column 13 so that the end on the second central column 12 side protrudes outside the triangle so as to be horizontal. It is provided with a “first horizontal girder 21” fixed so as to be delivered.
Further, the staircase according to the present embodiment is positioned higher than the first horizontal girder 21 and is horizontal, and the end on the second central pillar 12 side jumps out of the triangle. As described above, a “second horizontal girder 22” is provided so as to be bridged between the first central column 11 and the second central column 12.
Further, the staircase according to the present embodiment is positioned so as to be higher than the second horizontal girder 22 and to be horizontal, and the end on the third central pillar 13 side protrudes outside the triangle. As described above, a “third horizontal girder 23” is provided so as to be bridged between the first central column 11 and the third central column 13.

Further, the staircase according to the present embodiment is positioned so as to be higher than the third horizontal girder 23 and is horizontal, and the end on the third central pillar 13 side protrudes outside the triangle. As described above, a “fourth horizontal girder 24” is provided so as to be bridged between the second central column 12 and the third central column 13.
Further, the staircase according to the present embodiment includes a “first outer spar 31” and a “first inner sag” spanned between the floor of the lower floor (for example, the first floor) and the first horizontal girder 21. It has digit 32 ”.
Further, the staircase according to the present embodiment includes a “second outer counter girder 33” bridged between the first horizontal girder 21 and the second horizontal girder 22.

In addition, the staircase according to the present embodiment includes a “third outer side girder 34” and a “third inner side girder 35” spanned between the second horizontal girder 22 and the third horizontal girder 23. ing.
The staircase according to the present embodiment includes a “fourth outer spar 36” spanned between the third horizontal girder 23 and the fourth horizontal girder 24.
Further, the staircase according to the present embodiment includes a “fifth outer side girder 37” and a “fifth inner side girder 37” spanned between the fourth horizontal girder 24 and the floor of the upper floor (for example, the second floor). It has a digit 38 ".
In addition, the staircase according to the present embodiment includes a plurality of “treading plates 41” that are supported and fixed to the spar.

The staircase according to the present embodiment includes a “column connecting member” that connects adjacent central columns.
Hereinafter, each component provided in the staircase according to the present embodiment will be described in detail.
(Center pillar)
As shown in FIGS. 1 to 13, the three central pillars (first central pillar 11, second central pillar 12, and third central pillar 13) are erected so as to be located at each vertex of the triangle. Yes.
A line connecting the first central column 11 and the second central column 12 is referred to as “first central column 11−second central column 12 line”.

A line connecting the second central column 12 and the third central column 13 is referred to as “second central column 12-third central column 13 line”.
A line connecting the first central column 11 and the third central column 13 is referred to as “first central column 11-third central column 13 line”.
Further, it is formed by “first central column 11—second central column 12 line”, “second central column 12—third central column 13 line”, and “first central column 11—third central column 13 line”. This triangle is called the “center triangle”.
The three central pillars are made of wood having a substantially pentagonal cross section.
Then, the outward surface of the first central column 11 and the outward surface of the second central column 12 are parallel, and the outward surface of the second central column 12 and the outward direction of the third central column 13 Are parallel to each other, and one outward surface of the third central column 13 and one outward surface of the first central column 11 are parallel to each other.

Further, the first central column 11, the second central column 12, and the third central column 13 are arranged to be counterclockwise in this order when viewed in plan.
Note that the first central column 11, the second central column 12, and the third central column 13 may be arranged in this order in a clockwise direction when viewed in plan. Then, a spiral staircase around the opposite direction is created.
(First horizontal girder 21)
As shown in FIGS. 1 to 13, the first horizontal girder 21 is arranged so that the second central column 12 and the second central column 12 and the end of the second central column 12 side protrude outside the central triangle so as to be horizontal. It is fixed so as to span the third central pillar 13.

Specifically, the first horizontal girder 21 is fixed to the second central column 12 and the third central column 13 so as to be horizontal.
The first horizontal girder 21 is fixed to the second central column 12 and the third central column 13 so that the end on the second central column 12 side protrudes outside the central triangle. That is, the first horizontal girder 21 is fixed so as to be bridged between the second central column 12 and the third central column 13, but the end on the second central column 12 side is the second central column. It extends beyond 12 and protrudes outside the central triangle.
The first horizontal girder 21 is made of substantially square plate-like wood.
The first horizontal girder 21 is fixed to the second central column 12 and the third central column 13 using a fixture such as a nail or a screw.

Further, the first horizontal digit 21 is a “lower horizontal digit” in relation to the second horizontal digit 22.
(2nd horizontal girder 22)
As shown in FIGS. 1 to 13, the second horizontal girder 22 is positioned higher than the first horizontal girder 21 and is horizontal, and the end on the second central pillar 12 side. Is fixed so as to be bridged over the first central column 11 and the second central column 12 so as to jump out of the central triangle.
Specifically, the second horizontal girder 22 is fixed to the first central column 11 and the second central column 12 so as to be higher than the first horizontal girder 21 by a dimension substantially equal to the dimension of the kick-up. Yes. That is, the second horizontal girder 22 is fixed at a position higher than the first horizontal girder 21 by a dimension approximately equal to the dimension of the kick-up. That is, the height difference between the first horizontal girder 21 and the second horizontal girder 22 is approximately the same as the kick-up dimension.

Further, since the first horizontal girder 21 is fixed to the second central column 12 and the third central column 13, while the second horizontal girder 22 is fixed to the first central column 11 and the second central column 12, The first horizontal girder 21 and the second horizontal girder 22 are not located on the same straight line when viewed in plan. That is, the first horizontal girder 21 and the second horizontal girder 22 appear to intersect in the vicinity of the second central pillar 12 when viewed in plan.
The second horizontal girder 22 is fixed to the first central column 11 and the second central column 12 so as to be horizontal.
The second horizontal girder 22 is fixed to the first central column 11 and the second central column 12 so that the end on the second central column 12 side protrudes outside the central triangle. That is, the second horizontal girder 22 is fixed so as to be bridged between the first central column 11 and the second central column 12, but the end on the second central column 12 side is the first central column. 11-extends beyond the second central pillar 12 along the second central pillar 12 line and protrudes outside the central triangle.

The second horizontal girder 22 is made of substantially square plate-like wood.
The second horizontal girder 22 is fixed to the first central column 11 and the second central column 12 using a fixture such as a nail or a screw.
Further, the second horizontal digit 22 is an “upper horizontal digit” in relation to the first horizontal digit 21.
The second horizontal digit 22 is a “lower horizontal digit” in relation to the third horizontal digit 23.
(Third horizontal girder 23)
As shown in FIGS. 1 to 13, the third horizontal girder 23 is positioned higher than the second horizontal girder 22 so as to be horizontal, and at the end on the third central pillar 13 side. Is fixed so as to be bridged over the first central column 11 and the third central column 13 so as to jump out of the central triangle.

Specifically, the third horizontal column 23 is fixed to the first central column 11 and the third central column 13 so as to be higher than the second horizontal column 22 by four steps. That is, the third horizontal girder 23 is fixed at a position higher than the second horizontal girder 22 for four steps. That is, the height difference between the second horizontal girder 22 and the third horizontal girder 23 is substantially the same as that of four steps.
Further, since the second horizontal girder 22 is fixed to the first central column 11 and the second central column 12, while the third horizontal girder 23 is fixed to the first central column 11 and the third central column 13, The second horizontal girder 22 and the third horizontal girder 23 are not located on the same straight line when viewed in plan. That is, the second horizontal girder 22 and the third horizontal girder 23 appear to intersect in the vicinity of the first central pillar 11 when viewed in plan.

The third horizontal girder 23 is fixed to the first central column 11 and the third central column 13 so as to be horizontal.
The third horizontal girder 23 is fixed to the first central column 11 and the third central column 13 so that the end on the third central column 13 side protrudes outside the central triangle. In other words, the third horizontal girder 23 is fixed so as to span the first central column 11 and the third central column 13, but the end on the third central column 13 side is the third central column 13. It extends beyond 13 and protrudes outside the central triangle.
The third horizontal girder 23 is made of substantially square plate-like wood.
The third horizontal girder 23 is fixed to the first central column 11 and the third central column 13 using a fixture such as a nail or a screw.

The third horizontal digit 23 is an “upper horizontal digit” in relation to the second horizontal digit 22.
The third horizontal digit 23 is a “lower horizontal digit” in relation to the fourth horizontal digit 24.
(4th horizontal girder 24)
As shown in FIGS. 1 to 13, the fourth horizontal girder 24 is positioned higher than the third horizontal girder 23 and is horizontal, and the end on the third central column 13 side. Is fixed over the second central column 12 and the third central column 13 so as to jump out of the central triangle.
Specifically, the fourth horizontal girder 24 is fixed to the second central pillar 12 and the third central pillar 13 so as to be higher than the third horizontal girder 23 by a dimension substantially equal to the dimension of the kick-up. Yes. That is, the fourth horizontal girder 24 is fixed at a position higher than the third horizontal girder 23 by a dimension substantially equal to the dimension of the kick-up. That is, the height difference between the third horizontal girder 23 and the fourth horizontal girder 24 is approximately the same as the kick-up dimension.

Further, since the third horizontal girder 23 is fixed to the first central column 11 and the third central column 13, while the fourth horizontal girder 24 is fixed to the second central column 12 and the third central column 13, The third horizontal beam 23 and the fourth horizontal beam 24 are not located on the same straight line when viewed in plan. That is, the third horizontal girder 23 and the fourth horizontal girder 24 appear to intersect each other in the vicinity of the third central pillar 13 when viewed in plan.
The fourth horizontal girder 24 is fixed to the second central column 12 and the third central column 13 so as to be horizontal.
The fourth horizontal girder 24 is fixed to the second central column 12 and the third central column 13 so that the end on the third central column 13 side protrudes outside the central triangle. That is, the fourth horizontal girder 24 is fixed so as to be bridged between the second central column 12 and the third central column 13, but the end on the third central column 13 side is the second central column. It extends beyond the third central pillar 13 along the line 12-third central pillar 13 and protrudes outside the triangle.

The fourth horizontal girder 24 is made of substantially square plate-like wood.
The fourth horizontal girder 24 is fixed to the second central column 12 and the third central column 13 using a fixing tool such as a nail or a screw.
The fourth horizontal digit 24 is an “upper horizontal digit” in relation to the third horizontal digit 23.
(1st outer side girder 31)
As shown in FIGS. 1 to 13, the first outer counter girder 31 is a counter girder spanned between the floor of the lower floor and the first horizontal girder 21.
Moreover, the 1st outer side girder 31 inclines diagonally so that height may become high gradually toward the 1st horizontal girder 21 from the floor of a lower floor.

In addition, the first outer spar 31 is provided at a position outside the central triangle.
Further, the first outer spar 31 is arranged in parallel with the first central pillar 11-the second central pillar 12 line with a predetermined distance between the first central pillar 11 and the second central pillar 12 line. Yes.
The first outer spar 31 is supported at the lower end by the floor of the lower floor, and the upper end is supported and fixed by the end of the first horizontal girder 21 on the second central pillar 12 side. ing.
Further, the first outer spar 31 is made of substantially square plate-like wood.
Moreover, the 1st outer side girder 31 is being fixed to the 1st horizontal girder 21 using fixing tools, such as a nail and a screw.

(No. 1 inner side girder 32)
As shown in FIGS. 1 to 13, the first inner spar 32 is disposed at a position closer to the central column than the first outer spar 31, and is spaced a predetermined distance from the first outer spar 31. The spar is placed between the floor of the lower floor and the first horizontal spar 21 so as to be parallel to the first outer spar 31.
The first inner spar 32 is inclined obliquely so that the height gradually increases from the floor of the lower floor toward the first horizontal spar 21.
Further, the first inner spar 32 is provided at a position outside the central triangle.

Moreover, the 1st inner side girder 32 is arrange | positioned along the 1st center pillar 11- 2nd center pillar 12 line.
The first inner spar 32 is supported at the lower end by the floor of the lower floor, and supported by the first horizontal girder 21 at the upper end, and is further fixed at the first center. The column 11 and the second central column 12 are also fixed.
The first inner spar 32 is made of substantially square plate-like wood.
Further, the first inner counter girder 32 is fixed to the first horizontal girder 21, the first central column 11 and the second central column 12 using a fixing tool such as a nail or a screw.

(2nd outer side girder 33)
As shown in FIGS. 1 to 13, the second outer counter girder 33 is a counter girder spanned between the first horizontal girder 21 and the second horizontal girder 22.
Further, the second outer counter girder 33 is inclined obliquely so that the height gradually increases from the first horizontal girder 21 to the second horizontal girder 22.
In addition, the second outer counter girder 33 is provided at a position outside the central triangle.
Further, the second outer counter girder 33 has a portion protruding from the second central column 12 side of the first horizontal beam 21 to the outside of the central triangle, and an outer side of the central triangle from the second central column 12 side of the second horizontal beam 22. It is fixed so as to be bridged over the part that protrudes into the area. Specifically, the second outer counter girder 33 has its lower end fixed to the second central column 12 side end of the first horizontal girder 21 and its upper end fixed to the second horizontal girder 22 second end. It is fixed to the end of the central pillar 12 side.

The second outer spar 33 is made of substantially square plate-like wood.
Further, the second outer counter girder 33 is fixed to the first horizontal girder 21 and the second horizontal girder 22 using a fixing tool such as a nail or a screw.
Further, as described above, the first horizontal girder 21 extends beyond the second central column 12 along the extension line of the second central column 12 to the third central column 13 line, and the second horizontal column 21 The horizontal girder 22 extends beyond the second central pillar 12 along an extension line of the first central pillar 11 to the second central pillar 12 line. In addition, the second outer counter girder 33 is fixed at one end to the end of the first horizontal girder 21 on the second central column 12 side and the other end to the end of the second horizontal girder 22 on the second central column 12 side. ing. Accordingly, when viewed in plan, the protruding portion from the second central column 12 side in the first horizontal beam 21, the protruding portion from the second central column 12 side in the second horizontal beam 22, and the second outer sheath beam 33 A triangle is made. Let this triangle be the “first landing stage triangle”.

(Third outer side girder 34)
As shown in FIGS. 1 to 13, the third outer counter girder 34 is a counter girder spanned between the second horizontal girder 22 and the third horizontal girder 23.
Further, the third outer counter girder 34 is inclined obliquely so that the height gradually increases from the second horizontal girder 22 to the third horizontal girder 23.
Further, the third outer spar 34 is provided at a position outside the central triangle.
Further, the third outer spar 34 is arranged in parallel with the second central column 12-the third central column 13 line with a predetermined distance between the second central column 12-the third central column 13 line. Yes.

The third outer counter girder 34 protrudes from the second central column 12 side of the second horizontal beam 22 to the outside of the central triangle, and the third horizontal column 23 from the third central column 13 side to the outer side of the central triangle. It is fixed so as to be bridged over the part that protrudes into the area. Specifically, the lower end of the third outer counter girder 34 is fixed to the end of the second horizontal girder 22 on the second central pillar 12 side, and the upper end of the third outer girder 34 is connected to the third horizontal girder 23 of the third horizontal girder 23. It is fixed to the end of the central pillar 13 side.
The third outer spar girders 34 are made of substantially square plate-like wood.
Further, the third outer counter girder 34 is fixed to the second horizontal girder 22 and the third horizontal girder 23 using a fixing tool such as a nail or a screw.

(3rd inner side girder 35)
As shown in FIGS. 1 to 13, the third inner counter girder 35 is disposed at a position closer to the central column than the third outer counter girder 34, and is spaced a predetermined distance from the third outer counter girder 34. The spar is placed between the second horizontal spar 22 and the third horizontal spar 23 so as to be parallel to the third outer spar 34.
The third inner spar 35 is inclined obliquely so that the height gradually increases from the second horizontal spar 22 to the third horizontal spar 23.
Further, the third inner spar 35 is provided at a position outside the central triangle.

The third inner spar 35 is disposed along the second central column 12 to the third central column 13 line.
In addition, the third inner girder 35 is fixed at its lower end to a portion of the second horizontal girder 22 that protrudes from the second central column 12 side to the outside of the central triangle, and its upper end at the third horizontal girder. 23 is fixed to a portion protruding from the third central column 13 side to the outside of the central triangle, and is also fixed to the second central column 12 and the third central column 13.
The third inner spar 35 is made of a substantially square plate-like wood.
Further, the third inner girder 35 is fixed to the second horizontal girder 22, the third horizontal girder 23, the second central column 12 and the third central column 13 using a fixing tool such as a nail or a screw.

(Fourth outer side girder 36)
As shown in FIGS. 1 to 13, the fourth outer counter beam 36 is a counter beam spanned between the third horizontal beam 23 and the fourth horizontal beam 24.
Further, the fourth outer spar 36 is inclined obliquely so that the height gradually increases from the third horizontal spar 23 to the fourth horizontal spar 24.
Further, the fourth outer spar 36 is provided at a position outside the central triangle.
The fourth outer girder 36 protrudes from the third central pillar 13 side of the third horizontal girder 23 to the outside of the central triangle, and the fourth horizontal girder 24 from the third central pillar 13 side to the outer side of the central triangle. It is fixed so as to be bridged over the part that protrudes into the area. Specifically, the lower end of the fourth outer counter girder 36 is fixed to the end of the third horizontal girder 23 on the side of the third central pillar 13 and the upper end of the fourth outer girder 36 is connected to the third horizontal girder 24 of the third horizontal girder 24. It is fixed to the end of the central pillar 13 side.

The fourth outer spar 36 uses substantially square plate-like wood.
The fourth outer girder 36 is fixed to the third horizontal girder 23 and the fourth horizontal girder 24 using a fixing tool such as a nail or a screw.
Further, as described above, the third horizontal girder 23 extends beyond the third central column 13 along the extension line of the first central column 11 to the third central column 13, and the fourth The horizontal girder 24 extends beyond the third central pillar 13 along an extension line of the second central pillar 12 to the third central pillar 13 line. Further, the fourth outer spar 36 is fixed at one end to the end of the third horizontal column 23 on the third central column 13 side and the other end to the end of the fourth horizontal column 24 on the third central column 13 side. ing. Accordingly, when viewed in plan, the protruding portion from the third central column 13 side in the third horizontal beam 23, the protruding portion from the third central column 13 side in the fourth horizontal beam 24, and the fourth outer spar 36 A triangle is made. This triangle is referred to as a “second landing field triangle”.

(Fifth outer side girder 37)
As shown in FIGS. 1 to 13, the fifth outer spar 37 is a spar that is bridged between the fourth horizontal spar 24 and the upper floor.
Further, the fifth outer counter girder 37 is inclined obliquely so that the height gradually increases from the fourth horizontal girder 24 toward the upper floor.
Further, the fifth outer counterspar 37 is provided at a position outside the central triangle.
The fifth outer spar 37 is arranged in parallel with the first central column 11-third central column 13 line with a predetermined distance between the first central column 11-third central column 13 line. Yes.

Further, the fifth outer counter girder 37 is fixed so as to be bridged between the portion of the fourth horizontal girder 24 protruding from the third central pillar 13 side to the outer side of the central triangle and the floor of the upper floor. . Specifically, the fifth outer counter girder 37 has its lower end fixed to the end of the fourth horizontal girder 24 on the third central pillar 13 side, and its upper end fixed to the upper floor. ing.
The fifth outer spar girder 37 is made of substantially square plate-like wood.
In addition, the fifth outer counter girder 37 is fixed to the fourth horizontal girder 24 and the upper floor using a fixing tool such as a nail or a screw.
(5th inner side girder 38)
As shown in FIGS. 1 to 13, the fifth inner weir spar 38 is disposed at a position closer to the center column than the fifth outer weir spar 37, and is spaced a predetermined distance from the fifth outer weir spar 37. The spar is placed between the fourth horizontal spar 24 and the upper floor so as to be parallel to the fifth outer spar 37.

Further, the fifth inner girder 38 is inclined obliquely so that the height gradually increases from the fourth horizontal girder 24 to the floor of the upper floor.
Further, the fifth inner spar 38 is provided at a position outside the central triangle.
Further, the fifth inner counter girder 38 is disposed along the first central column 11 to the third central column 13 line.
The fifth inner spar 38 has a lower end fixed to the fourth horizontal girder 24 and an upper end fixed to the floor of the upper floor. It is also fixed to the third central pillar 13.

Further, the fifth inner sheathing girder 38 is made of substantially square plate-like wood.
The fifth inner counter girder 38 is fixed to the floor of the upper floor, the fourth horizontal girder 24, the first central column 11 and the third central column 13 using a fixing tool such as a nail or a screw.
(Footboard 41)
As shown in FIG. 1 to FIG. 13, three rectangular treads 41 are supported and fixed to the first outer weir 31 and the first inner weir 32, The triangular tread 41 is supported and fixed, and the fourth outer girder 34 and the third inner girder 35 are supported and fixed by four rectangular treads 41, Also, a single triangular tread 41 is supported and fixed on the fourth outer spar 36, and the fourth outer spar 37 and the fifth inner spar 38 have four rectangular shapes. The footboard 41 is supported and fixed.

Specifically, three quadrangular treads 41 are provided between the first outer spar 31 and the first inner spar 32. One of the three tread plates 41 is supported and fixed to the first outer spar 31 and the other to the first inner spar 32.
Further, a single tread plate 41 having a triangular shape is supported and fixed to the second outer sheathing girder 33. As described above, the first horizontal girder 21 extends beyond the second central column 12 along the extension line of the second central column 12 to the third central column 13, and the second horizontal column 21 22 extends beyond the second central pillar 12 along an extension line of the first central pillar 11 to the second central pillar 12 line. In addition, the second outer counter girder 33 is fixed at one end to the end of the first horizontal girder 21 on the second central column 12 side and the other end to the end of the second horizontal girder 22 on the second central column 12 side. ing. Accordingly, when viewed in plan, the protruding portion from the second central column 12 side in the first horizontal beam 21, the protruding portion from the second central column 12 side in the second horizontal beam 22, and the second outer sheath beam 33 With this, a triangle called “first landing stage triangle” is created. Moreover, the footboard 41 supported and fixed to the 2nd outer side girder 33 is formed in the shape which corresponds to a 1st landing stage triangle. For this reason, the footboard 41 supported and fixed to the second outer sheathing girder 33 has a size extending from the first horizontal girder 21 to the second horizontal girder 22. Further, the tread plate 41 supported and fixed by the second outer sheathing girder 33 is fixed at one end to the first horizontal girder 21 and at the other end to the second horizontal girder 22. The tread board 41 supported and fixed to the second outer sheathing girder 33 is a landing.

In addition, four quadrangular treads 41 are provided between the third outer spar 34 and the third inner spar 35. One of the four treads 41 is supported and fixed on the third outer spar 34 and the other on the third inner spar 35.
In addition, one triangular tread 41 is supported and fixed to the fourth outer spar 36. As described above, the third horizontal girder 23 extends beyond the third central column 13 along the extension line of the first central column 11 to the third central column 13, and the fourth horizontal girder. 24 extends beyond the third central column 13 along an extension line of the second central column 12 to the third central column 13. Further, the fourth outer spar 36 is fixed at one end to the end of the third horizontal column 23 on the third central column 13 side and the other end to the end of the fourth horizontal column 24 on the third central column 13 side. ing. Accordingly, when viewed in plan, the protruding portion from the third central column 13 side in the third horizontal beam 23, the protruding portion from the third central column 13 side in the fourth horizontal beam 24, and the fourth outer spar 36 To form a triangle called “second landing triangle”. Further, the footboard 41 supported and fixed by the fourth outer spar 36 is formed in a shape that matches the second landing triangle. For this reason, the footboard 41 supported and fixed to the fourth outer spar 36 is sized from the third horizontal girder 23 to the fourth horizontal girder 24. Further, the tread plate 41 supported and fixed by the fourth outer spar 36 is fixed at one end to the third horizontal girder 23 and at the other end to the fourth horizontal girder 24. The tread board 41 supported and fixed by the fourth outer spar 36 is used as a landing.

Further, four rectangular footboards 41 are provided between the fifth outer weir 37 and the fifth inner weir 38. One of the four tread plates 41 is supported and fixed to the fifth outer spar 37 and the other to the fifth inner spar 38.
The tread 41 is made of plate-like wood.
In addition, the tread plate 41 is fixed to each sheathing girder and each horizontal girder using a fixing tool such as a nail or a screw.
(Column connecting member)
As shown in FIGS. 1 to 13, the column connecting member is a member that connects adjacent central columns.

In the present embodiment, three column connecting members from first to third are provided.
The first column connecting member 51 is fixed at one end to the first central column 11 and the other end to the second central column 12, thereby connecting the first central column 11 and the second central column 12. is doing.
The second column connecting member 52 is fixed at one end to the second central column 12 and at the other end to the third central column 13, thereby connecting the second central column 12 and the third central column 13. is doing.
The third column connecting member 53 is fixed at one end to the first center column 11 and at the other end to the third center column 13, thereby connecting the first center column 11 and the third center column 13. is doing.
Moreover, plate-shaped wood is used for the column connecting member.

Further, the column connecting member is fixed to each central column using a fixing tool such as a nail or a screw.
As described above, in the present embodiment, the three central pillars from the first to the third are erected so as to be positioned at the vertices of the triangle when viewed in plan, The lower horizontal girder is fixed so that it spans any two of the central pillars, and is positioned higher than the lower horizontal girder. The upper horizontal girder is fixed so as not to be located on the line, but to be bridged to any two of the three central pillars, and further to the lower horizontal girder and the upper horizontal girder. The sword was fixed, and the tread 41 was supported by the sag.

For this reason, the load applied to the tread plate 41 is first transmitted to the spar, and the load transmitted to the spar is transmitted to the lower horizontal girder and the upper horizontal girder. In addition, the load transmitted to the lower horizontal girder is transmitted to any two of the three central columns, and the load transmitted to the upper horizontal girder is also applied to any two of the three central columns. It is transmitted. The load applied to the footboard 41 is thus dispersed.
Therefore, it becomes a spiral staircase that exhibits sufficient strength even with wood.
In the present embodiment, the upper horizontal girder (second horizontal girder) is positioned higher than the lower horizontal girder (first horizontal girder 21, third horizontal girder 23) by a dimension approximately equal to the dimension of the kick-up. 22 and the fourth horizontal girder 24), and the lower horizontal girder (the first horizontal girder 21 and the third horizontal girder 23) protrudes outside the central triangle and the upper horizontal girder (second horizontal girder 22). The fourth horizontal girder 24) is bridged between the portions protruding outward from the central triangle, the second girder 33 (second outer girder 33, fourth outer girder 36), and this girder (second outer girder). The tread 41 is fixed to the spar 33 and the fourth outer spar 36, and the tread 41 is moved from the lower horizontal girder (first horizontal girder 21, third horizontal girder 23) to the upper horizontal girder (second horizontal girder). 22 and the 4th horizontal girder 24).

  For this reason, although it is a staircase that spirals around the outside of the three central pillars, a landing can be provided, which can further improve safety.

The whole perspective view of the stairs concerning the embodiment of the invention. The whole perspective view of the stairs concerning the embodiment of the invention. The whole perspective view of the stairs concerning the embodiment of the invention. The whole perspective view of the stairs concerning the embodiment of the invention. The whole perspective view of the stairs concerning the embodiment of the invention. The partial expansion perspective view of the stairs which concerns on embodiment of this invention. The partial expansion perspective view of the stairs which concerns on embodiment of this invention. The partial expansion perspective view of the stairs which concerns on embodiment of this invention. The partial expansion perspective view of the stairs which concerns on embodiment of this invention. The partial expansion perspective view of the stairs which concerns on embodiment of this invention. The partial expansion perspective view of the stairs which concerns on embodiment of this invention. The partial expansion perspective view of the stairs which concerns on embodiment of this invention. The partial expansion perspective view of the stairs which concerns on embodiment of this invention.

Explanation of symbols

11 First central pillar
12 Second central pillar
13 Third central pillar
21 1st horizontal girder
22 Second horizontal girder
23 Third horizontal girder
24 4th horizontal digit
31 1st outer spar
32 1st inner spar
33 Second outer spar
34 Third outer spar
35 Third inner spar
36 4th outer spar
37 Fifth outer girder
38 Fifth Inner Sasara Girder
41 Footboard
51 1st column connecting member
52 Column 2 connection member
53 Third column connecting member

Claims (3)

N central pillars from the first to the n-th that are arranged and erected so as to be located at respective vertices of an n-gon (n is an integer of 3 or more) when viewed in plan,
A lower horizontal girder fixed so as to be bridged over any two of the n central pillars so as to be horizontal and at least one of the ends protrudes outside the n-gon. ,
It is higher than the lower horizontal girders, and when viewed in plan, it is not located on the same straight line as the lower horizontal girders and is horizontal, and at least one end is an n-gonal shape. An upper horizontal girder fixed so as to be bridged over any two of the n central pillars so as to jump out of
A girder that is fixed so as to be bridged over a portion that protrudes outside the n-gon in the lower horizontal girder and a portion that protrudes outside the n-gon in the upper horizontal girder;
A staircase characterized by comprising a tread board supported and fixed by a further spar. Three central pillars from first to third that are arranged and erected so as to be located at respective vertices of the triangle when viewed in plan,
A lower horizontal girder that is fixed so as to be bridged between the first central column and the second central column so that at least the end portion on the second central column side protrudes outside the triangle. ,
The first central column and the third central column are positioned so as to be higher than the lower horizontal girders and so as to be horizontal and at least the end on the third central column side protrudes outside the triangle. An upper horizontal girder fixed so as to be bridged,
A balance beam fixed so as to be bridged over a portion protruding from the second central column side in the lower horizontal beam to the outside of the triangle and a portion protruding from the third central column side in the upper horizontal beam to the outside of the triangle;
A staircase characterized by comprising a tread board supported and fixed by a further spar. Three central pillars from first to third that are arranged and erected so as to be located at respective vertices of the triangle when viewed in plan,
A lower horizontal girder that is fixed so as to be bridged between the second central column and the third central column so that at least the end portion on the second central column side protrudes outside the triangle so as to be horizontal. ,
The second horizontal girder is positioned so that it is higher than the lower horizontal girder by approximately the same dimension as the kick-up dimension, and so that it is horizontal and at least the end on the second central pillar side protrudes outside the triangle. An upper horizontal girder fixed so as to be bridged between the first central pillar and the second central pillar;
A balance beam fixed so as to be bridged over a portion protruding from the second central column side in the lower horizontal beam to the outside of the triangle and a portion protruding from the second central column side in the upper horizontal beam to the outside of the triangle;
A staircase characterized in that it comprises a tread board supported and fixed by a further girder, the tread board is formed from a lower horizontal girder to an upper horizontal girder and is used as a landing.