JP2021021256A - Receiving device for spiral stair, step board receiver, spiral stair and construction method of spiral stair - Google Patents

Abstract

To enable construction of a step board irrespective of the difference in the structure of a core housing of a step board of a spiral stair, the size of the thickness of a core column, and the difference in the step board housing method with respect to a side plate on the outside of the spiral stair.SOLUTION: A receiving device A for a spiral stair is provided which includes a plurality of step board receivers 31-33 for supporting inner end parts of step boards 11-13 of a spiral stair S. On a lower surface of each of the step boards 11-13, a recessed groove 19 is formed as a step board side positioning part, and each of the step board receivers 31-33 includes a mounting part 35 mounted and fixed on a core column 1, and a receiving part 46 for receiving the step boards 11-13. At the receiving part 46, a protrusion strip 54 engaged with the recessed groove 19 of each of the step boards 11-13 and for positioning the step boards 11-13 at each of the step board receivers 31-33, and a placement part 48 on which an inner end part of each of the step boards 11-13 positioned by the protrusion strip 54 is placed and fixed are provided. A position of the recessed groove 19 of each of the step boards 11-13 and an arrangement position in a circumferential direction of the core column 1 of the protrusion strip 54 of each of the step board receivers 31-33 are set according to a core housing structure and thickness of the core column 1.SELECTED DRAWING: Figure 10

Description

The present invention relates to a rotating staircase receiving device, a tread plate receiving device thereof, a rotating staircase constructed by the rotating staircase receiving device, and a method thereof.

Conventionally, a circular staircase in which a plurality of treads are arranged radially around a core pillar is generally well known. In this round staircase, a plurality of tread plates are arranged in a stepped shape with a riser plate interposed between the upper and lower tread plates, and the inner end portions of the tread plates are attached and fixed at different height positions of the core pillars. However, there is a problem that it is difficult to construct the inner ends of the plurality of treads on the core pillar with a receiving material.

Specifically, there are three reasons. First, as a structure in which a plurality of treads are arranged in the surrounding stairs, there are a step nose core fitting structure and a riser core fitting structure. In the step nose core fitting structure, the step nose portion of each tread plate. On the other hand, in the riser core storage structure, the straight line passing through the riser plate arranged under each tread plate is arranged so as to pass through the center of the core pillar. The mounting position of the receiving material with respect to the core pillar changes according to these double-core storage structures.

Secondly, square lumber is used as the core pillar, but the thickness of the core pillar (the length of one side of the square lumber) may differ to multiple types, and the core of the receiving material also depends on the thickness of the core pillar. The mounting position with respect to the pillar changes. Further, if the core pillar is thin, the mounting space for the receiving material becomes small.

Thirdly, as a tread plate storage method in which the outer end portion of the tread plate is housed in the side plate (side girder) located on the outside of the stairs, a plurality of tread plate insertion grooves opened to the rear side are formed in a stepped shape on the inner surface of the side plate. , A general side plate storage method in which the outer end of each tread is inserted into this tread insertion groove from the rear side and fixed, and a plurality of tread mounting portions are formed in a stepped shape on the upper surface of the side plate to form the outer end of the tread. There is a method of inserting the treads from above on the treads and fixing them, and the mounting directions of both types of treads are different. Therefore, it is necessary to specify the mounting direction of the tread plate with respect to the receiving material in consideration of the difference in the mounting direction of the tread plate of both types, and it is difficult to design the receiving material.

On the other hand, for example, as shown in Patent Document 1, a plurality of plate-shaped intermediate support members are attached to the side surface of a wall body corresponding to a core pillar, and an inner end portion of each tread plate is placed and fixed on the intermediate support member. A staircase structure around which a tool (receptacle) is attached has been proposed.

Japanese Unexamined Patent Publication No. 10-196078

However, in the above-mentioned Patent Document 1, in the tread plate storage method in which the outer end portion of the tread plate is housed in the side plate located on the outside of the stairs, the outer end portion of the tread plate is placed on a plurality of tread plate mounting portions on the upper surface of the side plate from above. It is a method of storing the swords that are fixed. Therefore, even if the outer end of the tread is inserted into the tread insertion groove of the side plate from the rear side and fixed, even if the outer end of the tread is slid from the rear side, the intermediate support member may interfere with the construction. Can not. That is, the one of Patent Document 1 does not correspond to the general side plate storage method, and the problem is not solved.

Further, a plurality of intermediate support members are required in addition to the receiver for each tread plate, and the number of members constituting the stairs increases, which increases the number of construction man-hours and is difficult in terms of construction saving. Moreover, it is necessary to process the intermediate support member with special dimensions, which increases the processing time and effort.

The present invention has been made in view of these points, and an object of the present invention is to require an intermediate support member by devising the structure of a tread plate receiver that supports the inner end portion of the tread plate of a rotating staircase to a core pillar. Regardless of the difference in the core fitting structure of the treads of the round stairs, the size of the core pillars, and the difference in the tread fitting method for the side plates on the outside of the round stairs, the treads can be constructed so that the treads can be constructed. It's about trying to make things easier.

In order to achieve the above object, in the present invention, a tread plate side positioning portion is provided on the tread plate, and a tread plate side positioning portion is provided on the tread plate receiver attached and fixed to the core pillar, and the tread plate is provided by aligning both positioning portions. The inner end was positioned and fixed to the core pillar.

Specifically, the first invention is at least one for supporting the inner end portion of at least one tread plate which is attached and fixed to the core pillar of the rotating stairs and is arranged around the core pillar with a riser plate interposed therebetween. The target is a receiver device for a round staircase equipped with two tread tray receivers.

The tread plate has a step nose core fitting structure in which a straight line passing through the nose of the tread passes through the center of the core pillar, and a straight line passing through a riser plate arranged under the tread plate passes through the center of the core pillar. It is constructed on the one side of the riser core accommodating structure arranged in such a manner, and this tread plate has a tread plate side positioning portion provided at a different position for each tread plate.

The tread plate receiver is provided so as to correspond to the tread plate, and the tread plate receiver is provided with a mounting portion that is mounted and fixed at a mounting position corresponding to the tread plate on the core pillar, and a mounting portion that is projected from the mounting portion to receive the tread plate. It has a receiving part.

The receiving portion includes a receiving portion side positioning portion for positioning the tread plate on the tread plate receiving tool by engaging or screwing with the tread plate side positioning portion of the tread plate having the step nose core accommodating structure or the rise core accommodating structure, and the receiving portion. A mounting portion is provided for mounting and fixing the inner end portion of the tread plate positioned by the tool-side positioning portion.

Then, at least one of the position of the tread plate side positioning portion on the tread plate and the position of the tread plate side positioning portion on the tread plate receiver in the direction around the core pillar is the core fitting structure and the thickness of the core pillar (one side of the square lumber). The feature is that it is set according to the length).

In the first invention, the rotating staircase receiver device includes at least one tread plate receiving device corresponding to at least one tread plate in the rotating staircase, and the tread plate receiving device is provided with a core pillar of the rotating staircase by its attachment portion. It is mounted and fixed at the mounting position according to the tread plate. A receiving portion is projected from this mounting portion, and an inner end portion of a tread plate having a step nose core accommodating structure or a rise core accommodating structure is placed and fixed to the mounting portion of the receiving portion. At that time, the receiving portion side positioning portion of the receiving portion engages with or is screwed with the tread plate side positioning portion of the tread plate, whereby the tread plate is positioned and fixed with respect to the tread plate receiving portion. Further, in the tread plate receiving tool, since the receiving portion that supports the tread plate is projected from the attachment portion to the core pillar and the receiving portion and the attachment portion are provided apart from each other, the stepped nose core fitting structure or the rise of the tread plate is provided. Even if there is a difference in construction due to the core fitting structure, the tread plate can be stably supported at the receiving portion, and the difference in construction can be easily dealt with.

Then, at least one of the position of the tread plate side positioning portion on the tread plate and the position of the tread plate side positioning portion on the tread plate receiver in the direction around the core pillar is set according to the core fitting structure and the thickness of the core pillar. Therefore, even if the tread plate is arranged in a step nose core fitting structure or a riser core fitting structure, or the thickness of the core pillar differs depending on the size, the position of the inner end of the tread plate with respect to the core pillar may change. At least one of the position of the tread side positioning portion and the position of the receiver side positioning portion around the core pillar is changed so as to respond to the change. By changing the position of the positioning portion on the tread plate side and the position of the positioning portion on the receiving tool side in this way, one type of tread plate receiving tool can be used for the tread plate regardless of the core fitting structure and the thickness of the core pillar. It facilitates the design of the receiver and the construction of the surrounding stairs.

In addition, when constructing the stairs, if the outer end of the tread plate is placed on the tread plate mounting part of the side plate from above and fixed by the skirting method, the tread plate receiver is attached to the core pillar first. The inner end portion of the tread plate may be placed and fixed on the mounting portion of the receiving portion of the tread plate receiving tool, and the outer end portion of the tread plate may be placed and fixed on the tread plate mounting portion of the side plate. On the other hand, when the outer end of the tread is inserted into the tread insertion groove on the inner surface of the side plate and fixed by the general side plate fitting method, the inner end of the tread is first placed on the receiving part of the tread receiver. Is fixed, the outer end of the tread plate to which the tread plate receiver is fixed is inserted into the tread plate insertion groove of the side plate to fix it, and the tread plate receiver to which the tread plate is fixed may be attached to the core pillar. Therefore, the tread plate can be easily constructed regardless of whether the tread plate storage method for accommodating the outer end portion of the tread plate is the width timber storage method or the side plate storage method.

In this way, the treads of the rotating stairs can be attached to the core pillar using one type of tread receiver corresponding to the treads, so that it is not necessary to use the conventional intermediate support members, and the number of members constituting the stairs is reduced. As a result, the construction man-hours and processing labor are reduced accordingly, and construction can be saved.

In the second invention, in the first invention, the tread plate side positioning portion of the tread plate is a concave groove formed on the lower surface of the tread plate, and the receiver side positioning portion of the tread plate receiver is a convex that fits into the concave groove. It is characterized by being an article.

In the second invention, the tread plate side positioning portion is a concave groove on the lower surface of the tread plate, and the tread plate becomes a tread plate receiver by fitting a ridge as a receiver side positioning portion of each tread plate receiver into the concave groove. Positioned against. Then, the position of the tread plate side positioning portion can be easily changed only by changing the position of the concave groove formed on the lower surface of the tread plate.

According to a third aspect of the invention, in the first or second invention, the tread plate-side positioning portion of the tread plate includes a plurality of embedded nuts embedded in the tread plate, and the receiver-side positioning portion of the tread plate receiver is a mounting portion. It is characterized by including a fixing bolt that is screwed into each of the plurality of embedded nuts in a penetrating state to fix the inner end portion of the tread plate to the mounting portion.

In the third invention, the tread plate side positioning portion includes a plurality of embedded nuts embedded in the tread plate, and a fixing bolt as a receiver side positioning portion of each tread plate receiver is placed on the plurality of embedded nuts. By screwing through the portion, the tread plate is positioned with respect to the core column. Then, the tread plate side positioning portion can be easily changed only by changing the position of the embedded nut embedded in the tread plate. Further, by screwing and fastening the fixing bolt to the embedded nut, the inner end portion of the tread plate can be fixed to the mounting portion of the tread plate receiver, and the embedded nut and the tread plate receiver for fixing the tread plate and the tread plate receiver can be fixed. The fixing bolts can also be used as the tread side positioning portion and the receiver side positioning portion, respectively.

According to a fourth aspect of the present invention, in any one of the first to third inventions, the mounting portion of the tread plate receiver is arranged at the mounting position of the core pillar, and the upper end portion or the lower end portion is above the mounting portion. Alternatively, it is characterized in that it is provided in a vertically elongated shape so as to come into contact with a mounting portion of another tread plate receiver adjacent to the lower side.

In the fourth invention, the mounting portion of the tread plate receiver has a vertically long shape, and when the mounting portion is arranged at the mounting position on the core pillar and mounted, the mounting portions of the two tread plate receivers adjacent to each other are connected to each other. Abut. When the tread plate receiver is attached in a state of being in contact with the attachment portion of another adjacent tread plate receiver in this way, the tread plate receiver is positioned and attached at the attachment position, and is attached in the direction around the core pillar. Can be easily positioned.

According to a fifth aspect of the present invention, in any one of the first to fourth inventions, the attachment portion of the tread plate receiver has a groove portion having an L-shaped cross section that engages with the corner portion of the core column in a close contact state. It is a feature.

In the fifth invention, the mounting portion is positioned with respect to the core pillar only by engaging the groove portion of the mounting portion in close contact with the corner portion of the core pillar, and the mounting portion can be easily mounted at the target mounting position. Is possible.

A sixth invention relates to a tread plate receiver, and the tread plate receiver constitutes a rotating staircase receiver device according to any one of the first to fifth inventions.

In the sixth invention, a tread plate receiver capable of exerting the action and effect of the peripheral staircase receiver device of the first to fifth inventions can be obtained.

The seventh invention relates to a round staircase, and the round staircase is characterized in that the tread plate is constructed by the tread plate receiver of any one of the first to fifth inventions.

In the seventh invention, the round staircase is constructed by attaching the tread plate to the core pillar with the tread plate receiver of the staircase receiver device in a step nose core fitting structure or a rise core fitting structure. Therefore, the same effects as those of the first to fifth inventions can be obtained.

An eighth invention is a method of constructing a rotating staircase by using any one of the following inventions, one of the following inventions, for a rotating staircase receiver, after the tread plate receiver is attached and fixed to a core pillar by an attachment portion. The tread plate is positioned and placed on the mounting portion of the receiving portion of the tread plate receiving tool by the tread plate side positioning portion and the receiving tool side positioning portion, and is fixed.

In the eighth invention, when constructing a round staircase with a round staircase receiver device, the tread plate receiver is first attached and fixed to the core pillar at the attachment portion, and after the attachment, the receiving portion of the tread plate receiver is placed. The tread plate is placed and fixed on the portion in a positioning state by the tread plate side positioning portion and the receiver side positioning portion. As a result, the outer end portion of the tread plate can be placed on the tread plate mounting portion of the side plate from above and fixed by the skirting method.

A ninth aspect of the invention is a method of constructing a circular staircase by using any one of the following inventions, a receiver device for the circular staircase, and a receiving portion of a tread plate receiver in a state where the staircase is not attached to a core pillar. The tread plate is positioned and placed on the mounting part by the tread plate side positioning part and the receiving tool side positioning part, and after fixing the tread plate to the tread plate receiving tool, the tread plate receiving tool to which the tread plate is fixed is attached to the mounting part. It is characterized by being attached and fixed to a core pillar.

In the ninth invention, when the rotating stairs are constructed by the rotating staircase receiving device, the tread plate is first placed on the mounting portion of the receiving portion of the tread plate receiving tool by the tread plate side positioning portion and the receiving tool side positioning portion. It is placed in a positioned state, and the tread plate is fixed to the tread plate receiver in that state. After that, the tread plate receiver to which the tread plate is fixed is attached and fixed to the core pillar at the attachment portion. As a result, the outer end portion of the tread plate can be inserted into the tread plate insertion groove on the inner surface of the side plate and fixed by the side plate fitting method.

As described above, according to the present invention, when the inner end portion of the tread plate of the rotating stairs is supported on the core pillar by the tread plate receiver, the tread plate side positioning portion is formed on the tread plate, and the tread plate receiver is the core pillar. It is assumed that a mounting portion to be mounted and fixed to the mounting portion and a receiving portion projecting from the mounting portion to receive the tread plate are provided, and the receiving portion is positioned on the tread plate side of each tread plate having a step nose core fitting structure or a rise core fitting structure. A receiver-side positioning portion for positioning the tread plate with respect to the core pillar is provided by engaging or screwing the portions, and at least the position of the tread plate side positioning portion on the tread plate and the attachment position of the tread plate receiver attachment portion on the core pillar One of them is set according to the core fitting structure and the thickness of the core pillar. As a result, even if the position of the inner end of the tread plate with respect to the core pillar changes due to the difference in the core fitting structure of the tread plate and the thickness of the core pillar, one type is attached to the tread plate regardless of the core fitting structure and the thickness of the core pillar. It is possible to easily design the tread plate receiver and construct the surrounding stairs by using the tread plate receiver. Further, the tread plate can be easily constructed regardless of whether the tread plate storage method for accommodating the outer end portion of the tread plate is the width timber storage method or the side plate storage method. Further, the intermediate support member is not required, the number of staircase constituent members is reduced, and the construction man-hours and processing labor are reduced, so that the construction can be saved.

FIG. 1 is a perspective view showing three tread plate receivers of the rotating staircase receiver device according to the first embodiment of the present invention. 2A and 2B show a receiver main body of the first-stage tread plate receiver, FIG. 2A is a plan view, and FIG. 2B is a front view. FIG. 3 shows an attachment of a tread plate receiver for the first stage, FIG. 3A is a plan view, and FIG. 3B is a side view. FIG. 4 shows a tread plate receiver for the second stage, FIG. 4A is a plan view, and FIG. 4B is a front view. 5A and 5B show a tread plate receiver for the third stage, FIG. 5A is a plan view, and FIG. 5B is a front view. FIG. 6 is a plan view showing the tread plates of the first to third stages. FIG. 7 is an enlarged cross-sectional view of a main part of the tread plate. FIG. 8 is a perspective view showing a state in which the tread plate receivers for the first to third stages are attached to the core pillars as viewed from the rear side. FIG. 9 is a perspective view of a three-step round staircase having a structure for accommodating a step nose core as viewed diagonally from the rear left side. FIG. 10 is a plan view of the stairs around the staircase core fitting structure. FIG. 11 is a plan view showing a state in which the position of the ridges of the tread plate receivers for the first to third stages is changed according to the thickness of the core pillar in the step nose core fitting structure. FIG. Shows when the thickness of the core pillar is 105 mm, FIG. 11B shows the case where the thickness of the core pillar is 90 mm, and FIG. 11C shows the case where the thickness of the core pillar is 120 mm. Shown. FIG. 12 is a plan view showing a state in which the positions of the recessed grooves and the tread plate receivers of the first to third stage tread plates arranged in the riser core accommodating structure are changed when the thickness of the core pillar is 105 mm. Is. FIG. 13 is a view corresponding to FIG. 1 showing a tread plate receiver of the rotating staircase receiver device according to the second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are merely exemplary and are not intended to limit the invention, its applications or its uses.

(Embodiment 1)
9 and 10 show a three-step round staircase S according to the first embodiment of the present invention. This round staircase S is constructed in the middle part of the upper and lower floors of the building and is a clockwise staircase that rises clockwise when viewed from above. In the description, the side of the stairs S where the lowest step is located is the front side, the opposite side is the rear side, and the left and right sides are the left and right sides when the rear side is viewed from the front side.

The circular staircase S has a core pillar 1 (center pillar) located at the center inside in the circumferential direction, and as shown in FIG. 10, one front pillar 2 is a core pillar on the left side of the core pillar 1. It is erected so as to be lined up in series with a certain interval (the distance between the centers is, for example, 1000 mm) with respect to 1. Further, two rear pillars 3 and 3 are erected in series at positions directly behind the core pillar 1 and the front pillar 2 at regular intervals (similarly, for example, 1000 mm) in the left-right direction. .. That is, the core pillar 1 and the front pillar 2 and the rear pillars 3 and 3 are located at positions corresponding to the front and rear, respectively, and the front-rear distance between them is between the core pillar 1 and the front pillar 2 and between the rear pillars 3 and 3. It is set to be the same as the distance in the left-right direction (similarly, for example, 1000 mm). The core pillar 1, the front pillar 2, and the rear pillar 3 are all pipe pillars made of wood with a square cross section, for example, having a side (length of one side of a square timber) of 105 mm. The core pillar 1, the front pillar 2, and the rear pillar 3 may have a rectangular cross section.

On the right side of the front pillar 2 and the left rear pillar 3, a left wall base material 6 made of gypsum board or the like extending in the front-rear direction is arranged between the two pillars 2 and 3. The left wall base material 6 is fixed to, for example, the right side surfaces of both pillars 2 and 3 with screws or the like. Further, on the front side of the two pillars 3 and 3 on the rear side, a rear wall base material 7 made of a gypsum board or the like extending in the left-right direction is arranged between the pillars 3 and 3. The rear wall base material 7 is fixed to the front side surface of the right rear pillar 3 at the right end portion by a screw or the like, for example, with the left end portion abutting against the right surface of the left wall base material 6.

Around the left surface and the rear surface of the core pillar 1, from the three pieces of wood material of the first stage to the third stage, which gradually increase in the clockwise direction over an angle range of 90 ° in a plan view from the lower stage to the upper stage. The tread plates 11 to 13 are constructed with a predetermined angle interval (basically 30 °). In the figure, the first to third steps (including the treads 11 to 13) of the round stairs S are indicated by circled numbers.

As shown in FIG. 9, the first step plate 11, which is the lowermost step of the round stairs S, is connected to the upper end of the lower straight stairs S1 which is located below the round stairs S and rises backward. .. On the other hand, the lower end of the upper straight staircase S2, which is parallel to the lower straight staircase S1 and rises forward, is connected to the third step tread plate 13, which is the uppermost step, via a landing with a wide tread surface (not shown). ..

FIG. 6 (a) shows the first-stage tread plate 11 and FIG. 6 (c) shows the third-stage tread plate 13 as viewed from the upper side (front side), and these are from substantially triangular plate materials. Become. FIG. 6B similarly shows the tread plate 12 of the second stage, and the tread plate 12 is made of a substantially rhombic plate material. In each case, the inner end corner is cut out in a straight line or an L shape, and as shown in FIG. 10, the outer end is in contact with the wall base materials 6 and 7, and the inner end is It is in contact with the core pillar 1 at the notch. Further, each of the tread plates 11 to 13 has a step nose portion 15 formed at an end portion on the lower step side.

As shown in FIGS. 6 and 7, on the lower surface (back surface) of each of the treads 11 to 13, the nose portion 15 is located at a position separated from the nose portion 15 by a certain dimension L (for example, 30 mm) called “nose protrusion”. A riser plate insertion groove 16 having a constant groove width (for example, 6 mm) extending in parallel with the above is formed over the entire length direction of the tread plates 11 to 13, and the riser plate 21 (FIGS. 9 to 12) is formed in the riser plate insertion groove 16. The upper end of the riser plate 21 is fitted, and the lower end of the riser plate 21 is fixed to the end opposite to the nose portion 15 on the lower tread plates 11 and 12.

Further, on the lower surface of each of the treads 11 to 13, for example, two (plurality) are arranged so as to be arranged substantially parallel to the riser plate insertion groove 16 in the portion opposite to the step nose portion 15 with respect to the riser plate insertion groove 16. Embedded nuts 18 and 18 are embedded and fixed. Each of the embedded nuts 18 is called a "demon nut" in which a plurality of protrusions are projected on the outer circumference, and is fitted into a bottomed hole on the lower surface of the tread plates 11 to 13 by driving, press-fitting, screwing, etc. and cannot rotate. It is fixed in place. The formation of the riser plate insertion groove 16 and the embedding of the embedding nuts 18 and 18 in each of the tread plates 11 to 13 are performed at the time of manufacturing, not at the construction site of the stairs S, together with the formation of the concave groove 19 (positioning portion on the tread plate side) described later. Will be. In FIG. 7, reference numeral 17 denotes a groove-shaped non-slip portion formed on the upper surface of the tread plates 11 to 13 near the nose portion 15.

The outer ends of the three-tiered treads 11 to 13 are fixedly supported by a side plate fitting method or a timber fitting method in the same manner as a general round staircase. 9 and 10 show a fixed support structure of the side plate storage method. Explaining the fixed support structure, the left plate 23 is fixedly supported on the front pillar 2 and the left rear pillar 3 on the right side of the left wall base material 6. The left side plate 23 is formed in a stepped shape with two front and rear tread plate insertion grooves 25, 25 in the horizontal direction, which are higher on the rear side. Both tread plate insertion grooves 25 and 25 are open to the rear side, and the outer end portion of the first step tread plate 11 is inserted into the tread plate insertion groove 25 on the front side, and the tread plate on the rear side is inserted higher than the tread plate insertion groove 25 on the front side. The left side portion of the outer end portion of the second step tread plate 12 is inserted and fixed to the groove 25 from the rear side. Further, a rear side plate 24 is fixedly supported by two rear pillars 3 and 3 on the front surface of the rear wall base material 7, and the rear side plate 24 is arranged in a horizontal direction in which the height increases in order toward the right side. The two-stage tread plate insertion grooves 25, 25 are formed in a stepped shape. Both tread plate insertion grooves 25 and 25 are opened to the right side, and the left tread plate insertion groove 25 is formed so as to be continuous at the same height position as the tread plate insertion groove 25 in the rear stage of the left side plate 20. The rear side of the outer end of the second step tread 12 is inserted into the insertion groove 25 from the right side, and the outer end of the third step tread 13 is inserted into the right tread insertion groove 25 from the right side and fixed.

Although not shown, the left side plate 23 is formed with two vertical riser plate insertion grooves, and the rear side plate 24 is formed with a similar riser plate insertion groove so as to be continuous with the tread plate insertion groove 25. The outer end portions of the riser plates 21 on the lower side of each of the tread plates 11 to 13 are fitted into the three riser plate insertion grooves, respectively.

On the other hand, in the fixed support structure of the side plate storage method, although not shown, the upper part of the left side plate 23 and the rear side plate 24 is cut out in a stepped shape, so that the tread plate in the fixed support structure of the side plate storage method is attached to the upper end portion. A tread plate support portion having the same height as the insertion groove 25 is formed. That is, at the upper end of the left side plate 23, two front and rear tread plate support portions in the horizontal direction, which are higher on the rear side, are formed in a stepped shape, and the outer end portion of the first step tread plate 11 is formed on the front tread plate support portion. Further, the left side portion of the outer end portion of the second stage tread plate 12 is placed and fixed from the upper side to the tread plate support portion on the rear side higher than the tread plate support portion on the front side. Further, at the upper end of the rear side plate 24, two horizontal tread plate support portions that gradually increase toward the right side are formed in a stepped shape, and the left tread plate support portion is the rear tread plate support portion of the left side plate 23. It is formed so as to be continuous at the same height position, the rear side portion of the outer end portion of the second step tread plate 12 is on the left tread plate support portion, and the outside of the third step tread plate 13 is on the right tread plate support portion. Each end is placed and fixed from above.

Further, as shown in FIG. 10, in the round stairs S, the three-step tread plates 11 to 13 are constructed with a step nose core fitting structure, and all of the virtual straight lines passing through the step nose portions 15 of each tread plate 11 to 13 are constructed. It is arranged so as to pass through the center O of the core pillar 1.

As a feature of the present invention, as shown in FIGS. 6 and 7, between the riser plate insertion groove 16 and the two embedded nuts 18 and 18 at a portion near the inner end of the lower surface (back surface) of each of the tread plates 11 to 13. In the portion of, one concave groove 19 having a short length extending parallel to the riser plate insertion groove 16 is formed. The concave groove 19 forms a positioning portion on the tread plate side, is arranged at a different position for each of the tread plates 11 to 13, and one end portion in the length direction thereof is open to the inner end portion of the tread plates 11 to 13.

On the other hand, as shown in FIG. 8, three upper and lower tread plate receivers 31 to 33 for the first to third stages are fixedly supported on the rear surface of the core pillar 1 in a state of being vertically spaced apart. .. The first-stage tread plate receiver 31 is on the first-stage tread plate 11, the second-stage tread plate receiver 32 is on the first-stage tread plate 12, and the third-stage tread plate receiver 33 is on the first-stage tread plate 13. It is provided exclusively to correspond. The upper surfaces (upper surfaces of the mounting portions 48, which will be described later) of these tread plate receivers 31 to 33 have the same height as the four tread plate insertion grooves 25, 25, ... (Three height positions) in the side plates 23 and 24, respectively. Arranged so as to be in the vertical position, the inner end of the first-stage tread plate 11 is on the upper surface of the lower first-stage tread plate receiver 31, and on the upper surface of the second-stage tread plate receiver 32 in the middle of the upper and lower sides. The inner end portion of the second-stage tread plate 12 is fixed by placing the inner end portion of the third-stage tread plate 13 on the upper surface of the third-stage tread plate receiver 33 on the upper side. That is, the three tread plate receivers 31 to 33 are attached and fixed at different height positions of the core pillar 1 of the rotating stairs S, and are arranged in a stepped shape around the core pillar 1 with the riser plate 21 interposed therebetween. Each of the inner ends of the tread plates 11 to 13 is supported. Then, as shown in FIG. 1, a combination of these three tread plate receivers 31 to 33 constitutes a rotating staircase receiver device A.

Each of the tread plate receivers 31 to 33 is made of iron, for example, and has a mounting portion 35 that is mounted and fixed at a mounting position corresponding to each tread plate 11 to 13 on the core pillar 1, and a tread plate on the mounting portion 35 in a plan view. Each of the receiving tools 31 to 33 is provided with a receiving portion 46 that is projected so as to form a different predetermined angle and receives the tread plates 11 to 13.

Specifically, as shown in the lower part of FIG. 1, the first-stage tread plate receiving tool 31 includes a receiving tool main body 37 and an attachment 40 integrally welded and fixed to the receiving tool main body 37. As shown in FIG. 2, the receiver body 37 is made of a plate material having a substantially L-shaped cross section bent at a right angle when viewed in the vertical direction, and a vertically long rectangular plate-shaped connecting portion 38 extending in the vertical direction on one side thereof. As shown in FIG. 3, the attachment 40 having the above is made of a vertically elongated plate material having an L-shaped cross section bent at a right angle when viewed in the vertical direction, and one side thereof is a connecting portion 41. By bending the connecting portions 38 and 41 of the receiving tool main body 37 and the attachment 40 together and welding them on the outer surface (see FIG. 2A), the attachment 40 is connected to the receiving device main body 37 and integrated. ing.

The attachment 40 may be connected and integrated with the receiver body 37 by screwing. In that case, although not shown, for example, three connecting holes arranged vertically are formed through one of the connecting portions 38 and 41 of the receiver body 37 and the attachment 40, while three connecting holes arranged vertically are formed on the other. One set, for example, three sets (nine in total) of connecting holes are formed through in a state where they are lined up at regular intervals in the horizontal direction, and one of the three sets of three connecting holes is formed as a receiver main body. The attachment 40 may be connected to and integrated with the receiver main body 37 by matching the three connecting holes of the above and inserting a connecting screw through the matching connecting holes and screwing and fastening with the nut. At that time, the elongated holes extending in the horizontal direction may be formed by integrally connecting the connecting holes formed through the other of the connecting portions 38 and 41 and arranged at regular intervals in the horizontal direction.

In this way, the two connecting portions 38 and 41 are connected by differently setting the other connecting hole that matches the one three connecting holes of both connecting portions 38 and 41 or by changing the position of the elongated hole. The front-rear position of the receiver body 37 with respect to the attachment 40, that is, the front-rear position of the protrusion 54 (positioning portion on the receiver side) in the peripheral direction of the core pillar 1 can be changed by relatively shifting the position. Then, when changing the positions of the mounting portion 48 and the ridge 54 in the first-stage tread plate receiver 31, the attachment 40 is connected without changing the mounting position on the rear surface of the core pillar 1 by the fixing portion 43 of the attachment 40. The relative positions of the connecting portion 38 of the receiver body 37 and the connecting portion 41 of the attachment 40 may be changed by changing the set of the connecting holes in the portion 41, and the positions of the mounting portion 48 and the protrusions 54 can be easily changed. ..

The other side of the attachment 40 is a rectangular plate-shaped fixing portion 43, and four mounting holes 44, 44, ... Arranged in the vertical direction are formed through the fixing portion 43. The mounting portion 35 is composed of the connecting portion 38 of the receiver body 37, the connecting portion 41 of the attachment 40 connected to the connecting portion 38, and the fixing portion 43 thereof. Then, as shown in FIGS. 8, 10 and 11 (a), the fixing portion 43 of the attachment 40 is brought into contact with the left side of the lower rear surface of the core pillar 1 on the bent outer surface, and at that time, the bent outer surface of the connecting portion 41 is brought into contact with the left side. Are arranged so as to be flush with the left surface of the core pillar 1, and in that state, the mounting screws V (see FIG. 8) are inserted into the mounting holes 44, 44, ... Of the fixing portion 43 and screwed into the core pillar 1. By fastening, the tread plate receiver 31 for the first stage is attached and fixed to the core pillar 1. Further, at that time, the mounting portion 35 has a groove portion 45 (V groove) having an L-shaped cross section formed between the connecting portion 38 of the receiver body 37 and the fixing portion 43 of the attachment 40 (FIG. 1, FIG. (See FIG. 2 virtual line), in the mounted state of the mounting portion 35 to the core pillar 1, the rear left corner portion of the core pillar 1 is engaged with the groove portion 45 in a close contact state.

The receiving portion main body 37 has a substantially triangular plate-shaped receiving portion 46 extending in the vertical direction continuously at a right angle to the connecting portion 38. As a result, the receiving portion 46 is parallel to the mounting portion 35 and projects so as to form an angle of 180 ° with respect to the mounting portion 35.

The central portion of the receiving portion 46 is punched out in a triangular shape along the outer peripheral edge for weight reduction. In the receiving portion 46, on the upper surface of the tip portion on the side away from the connecting portion 38, a mounting portion 48 extending in the horizontal direction to the side where the connecting portion 38 is located is integrally bent so as to be continuously bent from the receiving portion 46. It is formed so that the inner end portion of the first step plate 11 is mounted and supported on the mounting portion 48.

Two bolt insertion holes 50, 50 are formed through the mounting portion 48. These bolt insertion holes 50, 50 are arranged so as to correspond to the two embedded nuts 18, 18 of the first stage tread plate 11 mounted on the mounting portion 48 (in other words, the tread plate 11). The embedded nuts 18 and 18 are embedded in the tread plate receivers 31 so as to correspond to the bolt insertion holes 50 and 50), and the fixing bolts 51 (see FIG. 1) inserted into the bolt insertion holes 50 from below. The first step plate 11 is fixed to the mounting portion 48 by screwing and fastening to each embedded nut 18 of the first step plate 11 mounted on the mounting portion 48.

Further, on the upper surface of the base end portion of the receiving portion 46 close to the connecting portion 38, a ridge 54 having a constant height having a shape in which the base end portion is extended upward from other portions is integrally formed. The ridge 54 engages with the concave groove 19 (positioning portion on the tread plate side) on the lower surface of the first step tread plate 11 to position the tread plate 11 with respect to the tread plate receiving tool 31 for the first step. Consists of. The ridge 54 engages with the concave groove 19 on the lower surface of the first-stage tread plate 11, the tread plate 11 is positioned on the tread plate receiver 31, and the inner end portion of the tread plate 11 is embedded in the mounting portion 48 in that state. It is fixed by fastening the fixing bolts 51 and 51 to the nuts 18 and 18.

The second-stage and third-stage tread plate receivers 32 and 33 do not have an attachment 40, unlike the first-stage tread plate receivers 31. In the second-stage and third-stage tread plate receivers 32 and 33, the same parts as those of the first-stage tread plate receiver 31 will be described with the same reference numerals.

The tread plate receiver 32 for the second stage is made of a plate material having a substantially L-shaped cross section that is bent at a constant angle (for example, 150 °) when viewed in the vertical direction as shown in the vertical center portion of FIG. 1 and FIG. .. That is, the tread plate receiver 32 for the second stage has a vertically long rectangular plate-shaped mounting portion 35 extending in the vertical direction and a substantially triangular plate extending in the vertical direction so as to project from the mounting portion 35 at the above angle. It has a shaped receiving portion 46, and four mounting holes 44, 44, ... Are formed through the mounting portion 35 side by side in the vertical direction. Then, as shown in FIGS. 8, 10 and 11 (a), the mounting portion 35 is brought into contact with the left and right substantially centers of the upper and lower middle rear surfaces of the core pillar 1 on the bent outer surface, and in that state, the mounting holes 44 are brought into contact with each other. By inserting the mounting screw V (see FIG. 8) and screwing and fastening to the core pillar 1, the tread plate receiver 33 for the second stage is mounted and fixed to the core pillar 1 at the mounting position.

Further, on the upper surface of the tip portion of the receiving portion 46, a mounting portion 48 extending horizontally to the side located on the mounting portion 35 is formed so as to be continuously bent from the receiving portion 46, and the mounting portion 48 has a second mounting portion 48. The inner end portion of the step board 12 is placed and supported. Two bolt insertion holes 50, 50 are arranged and penetrated in the mounting portion 48 so as to correspond to the two embedded nuts 18, 18 of the second step tread plate 12 mounted on the mounting portion 48. A fixing bolt 51 (see FIG. 1), which is formed and inserted into each bolt insertion hole 50 from below, is screwed into each embedded nut 18 of the second step tread plate 12 mounted on the mounting portion 48. By fastening, the second step plate 2 is fixed to the mounting portion 48.

Further, on the upper surface of the base end portion on the mounting portion 35 side of the receiving portion 46, a ridge 54 having the base end portion extended upward is integrally formed. The ridge 54 engages with the concave groove 19 (positioning portion on the tread plate side) on the lower surface of the second step tread plate 12, and provides a receiving tool side positioning portion for positioning the tread plate 12 with respect to the tread plate receiving tool 32 for the second step. In a state where the ridge 54 is engaged with the concave groove 19 of the second step tread plate 12 and the tread plate 12 is positioned on the tread plate receiver 32, the inner end portion of the tread plate 12 is placed on the mounting portion 48. It is fixed by fastening the fixing bolts 51 and 51 to the embedded nuts 18 and 18.

As shown in the upper part of FIG. 1 and FIG. 5, the tread plate receiver 33 for the third stage is made of a plate material having a substantially L-shaped cross section that is bent at a constant angle (for example, 120 °) when viewed in the vertical direction. The tread plate receiver 33 for the third stage has a vertically long rectangular plate-shaped mounting portion 35 extending in the vertical direction and a substantially triangular plate-shaped mounting portion 35 projecting from the mounting portion 35 at the above angle and extending in the vertical direction. It has a receiving portion 46 of the above, and four mounting holes 44, 44, ... Are formed through the mounting portion 35. As shown in FIGS. 8, 10 and 11 (a), the mounting portion 35 is brought into contact with the right side of the upper rear surface of the core pillar 1 on the bent outer surface, and in that state, the mounting screws ( By inserting (not shown) and screwing and fastening to the core pillar 1, the tread plate receiver 33 for the third stage is mounted and fixed to the core pillar 1 at the mounting position.

Further, a mounting portion 48 extending horizontally to the side located on the mounting portion 35 is formed on the upper surface of the tip portion of the receiving portion 46 so as to be continuously bent from the receiving portion 46, and the mounting portion 48 has a third stage. The inner end portion of the tread plate 13 is placed and supported. Two bolt insertion holes 50, 50 are arranged in the mounting portion 48 so as to correspond to the two embedded nuts 18, 18 of the third step tread plate 13 mounted on the mounting portion 48, and are formed through. The fixing bolt 51 (see FIG. 1) inserted into each bolt insertion hole 50 from below is screwed and fastened to each embedded nut 18 of the third step tread plate 13 mounted on the mounting portion 48. By doing so, the third step tread plate 13 is fixed to the mounting portion 48.

Further, on the upper surface of the base end portion of the receiving portion 46, a ridge 54 having the base end portion extended upward is integrally formed. The ridge 54 engages with the concave groove 19 (positioning portion on the tread plate side) on the lower surface of the third step tread plate 13 to position the tread plate 13 with respect to the tread plate receiving tool 33 for the third step. The ridge 54 is engaged with the concave groove 19 on the lower surface of the third step tread plate 13, and the inner end portion of the tread plate 13 is placed in a state where the tread plate 13 is positioned on the tread plate receiver 33. It is fixed to the placement portion 48 by fastening the fixing bolts 51, 51 to the embedded nuts 18, 18.

Then, the mounting portions 35 of each of the first-stage to third-stage tread plate receivers 31 to 33 (the fixing portion 43 of the attachment 40 in the first-stage tread plate receiver 31) are attached in the horizontal direction to the rear surface of the core pillar 1. By changing the position, the position of the ridge 54 (positioning portion on the receiving side) in the peripheral direction of the core pillar 1 is changed. Further, the mounting portion 35 (the fixing portion 43 of the attachment 40 in the first-stage tread plate receiver 31) is a flat plate material, and all of them are mounted and fixed together on the rear surface of the core pillar 1, so that the mounting portion 35 can be mounted and fixed. The position can be easily changed.

The horizontal mounting positions of the mounting portions 35 of the second-stage and third-stage tread plate receivers 32 and 33 with respect to the rear surface of the core pillar 1 are, for example, two types of attachment positions provided for each of the tread plate receivers 32 and 33. It is determined using the pattern of. This paper pattern has the same left-right width as the rear surface of the core material 1, and both ends thereof have a U-shaped cross section bent to the front, and the mounting holes 44, 44 of the tread plate receivers 32, 33 are in the middle portion. Holes corresponding to ，… are formed through. Then, this paper pattern is pressed against the left and right ends of the paper pattern at the desired height position on the rear surface of the core pillar 1 while being hooked on the left and right surfaces of the core pillar 1, and marked as a screwing position on the rear surface of the core pillar 1 through the holes. Is to be attached. Further, when the mounting portion 35 is mounted on the rear surface of the core pillar 1, after removing the paper pattern, the positions of the marks are aligned with the mounting holes 44, 44, ... Of the mounting portion 35, and the mounting holes 44, 44, ... The screw V is inserted into the ... and screwed into the core pillar 1. As for the first-stage tread plate receiver 31, a paper pattern is not provided because the horizontal mounting position with respect to the rear surface of the core pillar 1 is determined by the groove portion 45. However, if necessary, a pattern having the same function can be used.

As described above, as shown in FIG. 10, in the round staircase S, the three-step tread plates 11 to 13 are constructed with a step nose core fitting structure, and the concave groove 19 (tread plate) in the tread plates 11 to 13 is constructed so as to have this step nose core fitting structure. One or both of the position of the side positioning portion) and the position of the ridge 54 (receiver side positioning portion) of the tread plate receivers 31 to 33 in the direction around the core pillar 1 are set.

By setting the height positions of the tread plate insertion grooves 25, 25, ... In each of the side plates 23, 24 and the mounting portions 48 of the tread plate receivers 31 to 33 to predetermined values, the tread plates adjacent to each other are vertically adjacent to each other. The height (lifting dimension) between 11 and 13 is, for example, 170 to 230 mm.

The three-tiered treads 11 to 13 are constructed with a step nose core fitting structure for the core pillar 1, and the thickness of the core pillar 1 (the length of one side of the square timber) is 105 mm, but depending on the surrounding stairs S, the treads 11 to 13 13 may be constructed with a riser core fitting structure instead of a step nose core fitting structure, or the thickness of the core pillar 1 may change from 105 mm to 90 mm or 120 mm, in which case, among the tread plates 11 to 13. The position of the end with respect to the core pillar 1 changes. In this embodiment, in any case, the position of the concave groove 19 on the lower surface of each tread plate 11 to 13 and the position of the ridge 54 of each tread plate receiver 31 to 33 in the peripheral direction of the core pillar 1 are changed. It is possible to use the above three tread plate receivers 31 to 33 as they are for construction.

More specifically, as shown in FIG. 12, the riser core fitting structure has a core having a virtual straight line passing through the riser plate 21 (specifically, the lower surface thereof) arranged below each of the tread plates 11 to 13. It is a core fitting structure arranged so as to pass through the center O of the pillar 1, and as compared with the step nose core fitting structure shown in FIG. 10, each tread plate 11 to 13 has a step nose portion 15 and a riser plate inserted on the lower surface of the tread plates 11 to 13. The groove 16 is arranged so as to be offset to the lower side by the dimension L of the protrusion of the nose between the groove 16 and the side surface of the groove on the side of the nose portion 15.

Therefore, in this riser core fitting structure, the concave groove 19 on the lower surface of each of the tread plates 11 to 13 is formed at a position opposite to the step nose portion 15 by the dimension L of the nose protruding from the riser plate insertion groove 16. Only ~ 13 is shifted with respect to the tread plate receivers 31 to 33 (core pillar 1), or the protrusions 54 of the tread plate receivers 31 to 33 are cored without changing the formation position of the concave groove 19 of the tread plates 11 to 13. The work is carried out by shifting it toward the circumference of the pillar 1. In the latter case, the tread plate receivers 31 to 33 are displaced together with the tread plates 11 to 13, and the attachment position on the rear surface of the core column 1 of the attachment portion 35 is shifted to the left side in the direction around the core column 1 of the ridge 54. The placement position may be changed to the left side. Also in this case, it is determined by using the paper pattern provided for each of the tread plate receivers 31 to 33.

On the other hand, the same applies to the change in the thickness of the core pillar 1, and the position of the ridge 54 of the tread plate receivers 31 to 33 in the peripheral direction of the core pillar 1 is changed, or the concave groove 19 on the lower surface of each tread plate 11 to 13 is changed. Change the position. FIG. 11 shows a state in which the positions of the protrusions 54 of the tread plate receivers 31 to 33 change according to the thickness of the core pillar 1 when the three-stage tread plates 11 to 13 are arranged in the step nose core fitting structure. FIG. 11A shows a state in which the thickness of the core pillar 1 is 105 mm. When the thickness of the core pillar 1 is 90 mm, as shown in FIG. 11B, the tread plate receivers 31 to 33 are displaced together with the tread plates 11 to 13, and the mounting position of the mounting portion 35 on the rear surface of the core pillar 1 is set to the right side. By shifting to, the arrangement position of the ridge 54 in the peripheral direction of the core pillar 1 is changed to the right side.

Further, when the thickness of the core pillar 1 is 120 mm, as shown in FIG. 11 (c), the tread plate receivers 31 to 33 for the first to third stages are on the rear surface of the core pillar 1 of the mounting portion 35. By shifting the mounting position of the ridge 54 to the left side of the position when the thickness of the core pillar 1 is 105 mm, the arrangement position of the ridge 54 in the peripheral direction of the core pillar 1 may be changed to the left side.

The position of the concave groove 19 on the lower surface of each of the treads 11 to 13 may be changed according to the thickness of the core pillar 1. In that case, the concave groove 19 increases as the thickness increases, similar to the difference in the core fitting structure. The distance from the nose portion 15 may be increased.

With the above configuration, in the three-step round staircase S according to the embodiment of the present invention, a plurality of tread plates 11 to 13 are housed in a step nose core or by using the three tread plate receivers 31 to 33 of the round staircase receiver device A. It is constructed with a cored structure. In FIG. 9, 57 is a drawstring attached to the surface of the core pillar 1 excluding the tread plates 11 to 13 and the riser plate 21.

Next, a method of constructing the round stairs S by using the round staircase receiver device A will be described. For each of the tread plates 11 to 13, a concave groove 19 as a tread plate side positioning portion is machined and formed together with a riser plate insertion groove 16 at a predetermined position on the lower surface (back surface) of the tread plates 11 to 13 in advance, and embedded nuts 18 and 18 are embedded. ing.

When the outer end of each of the treads 11 to 13 is supported on the side plates 23 and 24 by a fixed support structure of a skirting method, first, a paper pattern is used to attach the core pillar 1 to the first to third stages. The tread plate receivers 31 to 33 are attached and fixed with screws at the attachment portion 35 (see FIG. 8). The height positions of the tread plate receivers 31 to 33 are determined so that the mounting portion 48 of the receiving portion 46 is at the same height as the corresponding tread plate support portions of the left side plate 23 and the rear side plate 24. In the step board receiver 31 for the first stage, the rear left corner portion of the core pillar 1 is provided in the groove portion 45 having an L-shaped cross section between the connecting portion 38 of the receiver body 37 and the fixing portion 43 of the attachment 40. Engage in close contact. The second-stage tread plate receiver 32 has the mounting portion 35 on the left and right middle portions of the upper rear surface of the core pillar 1, and the third-stage tread plate receiver 33 has the mounting portion 35 on the right side portion of the upper rear surface of the core pillar 1. Screw each to.

After that, the tread plates 11 to 13 are bridged between the tread plate support portions of the left side plate 23 and the rear side plate 24 and the mounting portions 48 of the tread plate receivers 31 to 33 corresponding to them, and the outer end portions thereof are supported by the tread plate. Fix it to the part from above. The inner end portion of the tread plates 11 to 13 is placed on the mounting portion 48 of the receiving portion 46 of the tread plate receiving tools 31 to 33, and the ridge 54 of the receiving portion 46 is fitted into the concave groove 19 on the lower surface of the tread plates 11 to 13. Then, the tread plates 11 to 13 and the tread plate receivers 31 to 33 are positioned. In that positioning state, the fixing bolts 51 and 51 are inserted from below into the bolt insertion holes 50 and 50 of the mounting portions 48 of the tread plate receivers 31 to 33 and screwed into the embedded nuts 18 and 18 on the lower surfaces of the tread plates 11 to 13. It is jointly fastened, and the inner end portions of the tread plates 11 to 13 are fixed to the tread plate receivers 31 to 33 by the fixing bolts 51 and 51. Further, the riser plate 21 is arranged between the tread plates 11 to 13, the upper end portion thereof is inserted into the riser plate insertion groove 16 of the upper tread plates 12 and 13, and the lower end portion is inserted into the nose portion 15 of the lower tread plates 11 and 12. Secure to the opposite end.

On the other hand, when the outer end portions of the tread plates 11 to 13 are supported on the side plates 23 and 24 by the fixed support structure of the side plate accommodating method, contrary to the above-mentioned width timber accommodating method, first, the tread plates 11 to 13 Attach and fix the tread plate receivers 31 to 33 on the inner end. That is, the inner end portions of the tread plates 11 to 13 are placed on the mounting portions 48 of the receiving portions 46 in each tread plate receiving tool 31 to 33, and the protrusions 54 of the receiving portions 46 are placed in the concave grooves 19 on the lower surface of the tread plates 11 to 13. Positioning is performed between the tread plates 11 to 13 and the tread plate receivers 31 to 33. In that positioning state, the fixing bolts 51 and 51 are inserted into the bolt insertion holes 50 and 50 of the mounting portion 48 and screwed to the embedded nuts 18 and 18 on the lower surfaces of the tread plates 11 to 13, and the inside of the tread plates 11 to 13 is screwed and fastened. The end portion is fixed to the tread plate receivers 31 to 33.

Next, the tread plates 11 to 13 to which the tread plate receivers 31 to 33 are fixed to the inner end portions are arranged between the left side plate 23 and the rear side plate 24 and the core pillar 1, and the outer end portions of the tread plates 11 to 13 are placed on the side plates. It is inserted into the tread plate insertion groove 25 of 23 and 24 from the rear side or the right side and fixed. After that, the tread plate receivers 31 to 33 of the tread plates 11 to 13 are attached and fixed to the core pillar 1 with screws at the attachment portion 35. At this time, a paper pattern can also be used. Each tread plate receiver 31 to 33 is so high that the mounting portion 48 of the receiving portion 46 is at the same height as the corresponding tread plate insertion groove 25 of the left side plate 23 and the rear side plate 24 so that the tread plates 11 to 13 are horizontal. Determine the position. The method of attaching the tread plate receivers 31 to 33 to the core pillar 1 is the same as in the case of the skirting method, and in the tread plate receiver 31 for the first stage, the fixing portion 43 of the attachment 40 is attached to the core pillar 1. Screw it to the left side of the lower rear surface. The second-stage tread plate receiver 32 has its mounting portion 35 on the left and right middle portions of the upper rear surface of the core pillar 1, and the third-stage tread plate receiver 33 has the mounting portion 35 on the right side of the upper rear surface of the core pillar 1. Screw each part. Further, the riser plate 21 is arranged between the tread plates 11 to 13, the upper end portion thereof is inserted into the riser plate insertion groove 16 of the upper tread plates 12 and 13, and the lower end portion is inserted into the nose portion 15 of the lower tread plates 11 and 12. Secure to the opposite end.

Therefore, in the above embodiment, the rotating staircase receiver device A includes three types of tread plate receivers 31 to 33 corresponding to the three tread plates 11 to 13, and each tread plate receiver 31 to 33 is attached to the tread plate receivers 31 to 33. The portion 35 mounts and fixes the core pillar 1 of the staircase S at a mounting position corresponding to each of the treads 11 to 13. A receiving portion 46 is projected from the mounting portion 35 so as to form a different angle for each of the tread plate receivers 31 to 33 in a plan view, and a step nose core accommodating structure or a riser core is provided in the mounting portion 48 of the receiving portion 46. The inner end portions of the tread plates 11 to 13 in the storage structure are placed and fixed. At that time, the convex strip 54 (receiver side positioning portion) provided on the receiving portion 46 engages with the concave groove 19 (tread plate side positioning portion) in each of the tread plates 11 to 13, and the tread plates 11 to 13 receive the tread plate. It is positioned and fixed to the tools 31 to 33. Embedded nuts 18, 18 are embedded in the lower surfaces of the tread plates 11 to 13, and the fixing bolts 51, which pass through the bolt insertion holes 50, 50 of the receiving portions 46 of the tread plate receiving tools 31 to 33, are embedded in the embedded nuts 18, 18. Since the 51 is screwed and fastened, not only the engagement structure between the convex strip 54 of the receiving portion 46 and the concave groove 19 of each tread plate 11 to 13 but also the tread plate 11 to 13 is a tread plate receiver due to this screwed structure. Positioned with respect to 31 to 33 (see the description of Embodiment 2 below).

The position of the concave groove 19 of the tread plates 11 to 13 and the position of the ridges 54 of the tread plate receivers 31 to 33 in the peripheral direction of the core pillar 1 are the same as the step nose core fitting structure or the riser core fitting structure and the core pillar 1. Since it is set according to the thickness, each of the treads 11 is due to the fact that the treads 11 to 13 are arranged in a step nose core fitting structure or a riser core fitting structure, or that the thickness of the core pillar 1 is different in size. Even if the position of the inner end of ~ 13 with respect to the core pillar 1 changes, the position of the concave groove 19 in the tread plates 11 to 13 and the core pillar 1 of the ridge 54 in the tread plate receivers 31 to 33 so as to respond to the change. One or both of the surrounding positions are changed. By changing the position of the concave groove 19 of the tread plates 11 to 13 and the position of the ridges 54 of the tread plate receivers 31 to 33 around the core pillar 1, regardless of the core fitting structure and the thickness of the core pillar 1. One type of tread plate receivers 31 to 33 can be used for each of the tread plates 11 to 13. As a result, the design of the tread plate receivers 31 to 33 and the construction of the surrounding stairs S become easy.

Further, in each of the tread plate receivers 31 to 33, a receiving portion 46 for supporting the tread plates 11 to 13 is integrally projected from the mounting portion 35 to be mounted and fixed to the core pillar 1, and the receiving portion 46 and the mounting portion are formed. Since the 35s are provided apart from each other, for example, by adjusting the distance between the mounting portion 35 and the receiving portion 46 at the design or manufacturing stage, the receiving portion 46 may have a difference in construction. The tread plates 11 to 13 can be stably supported, and it becomes possible to easily cope with the difference in construction.

Further, as described above, when the tread plates 11 to 13 are constructed, the outer end portion thereof is placed on the tread plate mounting portions of the side plates 23 and 24 from above and fixed by the skirting method. The tread plate receivers 31 to 33 are attached to the core pillar 1, and the inner end portions of the tread plates 11 to 13 are placed and fixed on the mounting portion 48 of the receiving portion 46 of the tread plate receivers 31 to 33 to mount and fix the tread plates 11 to 13. The outer end portion is mounted and fixed on the tread plate mounting portions of the side plates 23 and 24. On the other hand, when the outer end portions of the tread plates 11 to 13 are inserted into the tread plate insertion grooves 25 on the inner surfaces of the side plates 23 and 24 and fixed by the general side plate fitting method, the receiving portion of the tread plate receiving tools 31 to 33 is first used. The inner end portions of the tread plates 11 to 13 are placed and fixed on the mounting portion 48 of the 46, and the outer end portions of the tread plates 11 to 13 to which the tread plate receivers 31 to 33 are fixed are inserted into the tread plates of the side plates 23 and 24. It is inserted into the groove 25 and fixed, and the tread plate receivers 31 to 33 are attached to the core pillar 1. Therefore, regardless of whether the tread plate storage method for accommodating the outer end portions of the tread plates 11 to 13 is the widthwood accommodating method or the side plate accommodating method, the tread plates 11 to 13 can be easily constructed.

Then, since each of the tread plates 11 to 13 can be attached to the core pillar 1 by using one type of tread plate receivers 31 to 33 corresponding thereto, it is not necessary to use the conventional intermediate support member, and the stairs S can be formed. Since the number of constituent members is reduced, the number of construction man-hours and processing labor can be reduced accordingly, and construction can be saved.

Further, the tread plate side positioning portion is a concave groove 19 on the lower surface of the tread plates 11 to 13, and the receiving tool side positioning portion is a ridge 54 of the receiving portion 46. By fitting the ridge 54 into the concave groove 19, the tread plate 11 to 11 13 is positioned with respect to the tread plate receivers 31 to 33. Therefore, when changing the position of the tread plate side positioning portion, it is only necessary to change the position of the concave groove 19 on the lower surface of the tread plate 11 to 13 (it is also necessary to change the position of the embedded nuts 18 and 18), and the position of the tread plate side positioning portion is changed. Can be easily performed. Further, since the concave groove 19 is parallel to the riser plate insertion groove 16 formed on the lower surfaces of the tread plates 11 to 13, it may be formed by using the same groove processing device at the same time as the riser plate insertion groove 16 is processed. The groove 19 can be easily formed. Further, since the ridges 54 of the tread plate receiving tools 31 to 33 are plate portions in which only a part of the receiving portion 46 is extended, the formation thereof can be easily performed.

In addition, a plurality of concave grooves 19 corresponding to the difference in the core fitting structure and the thickness of the core pillar 1 are formed in parallel with the tread plates 11 to 13 in advance, and one of the concave grooves 19 is formed at the time of construction. You can also choose.

Further, in the first-stage tread plate receiver 31, the attachment portion 35 is composed of the receiver body 37 and the attachment 40, and the connecting portion 38 of the receiver body 37 and the fixing portion 43 of the attachment 40 are arranged orthogonally to each other. Therefore, a groove portion 45 having an L-shaped cross section is formed between the two. Therefore, when the mounting portion 35 of the first-stage tread plate receiver 31 is mounted and fixed to the core pillar 1 as described above, the groove portion 45 of the mounting portion 35 is closely engaged with the rear left corner portion of the core pillar 1. The mounting portion 35 is positioned with respect to the core pillar 1 and the mounting portion 35 can be easily mounted at a target mounting position.

The groove 45 of the mounting portion 35 is bent into an L-shaped cross section instead of being provided by the intersection where the connecting portion 38 of the receiver body 37 and the connecting portion 41 of the attachment 40 are connected as described above. It can also be formed inside the corners of the plate material.

In the first embodiment, the embedded nuts 18 and 18 embedded in the lower surfaces of the tread plates 11 to 13 are eliminated, and fixing screws (not shown) are used instead of the fixing bolts 51 and 51, and the fixing screws are used respectively. It is also possible to fix the tread plates 11 to 13 to the tread plate receivers 31 to 33 by inserting them into the bolt insertion holes 50 of the receiving portions 46 in the tread plate receivers 31 to 33 and screwing them into the tread plates 11 to 13. In that case, the tread plates 11 to 13 are positioned with respect to the tread plate receivers 31 to 33 only by engaging the concave groove 19 of the tread plates 11 to 13 with the ridges 54 of the tread plate receivers 31 to 33.

Further, the embedded nuts 18 and 18 on the lower surfaces of the tread plates 11 to 13 and the fixing bolts 51 which are inserted into the embedded nuts 18 and 18 and screwed into the bolt insertion holes 50 and 50 of the tread plate receivers 31 to 33. , 51 are the same as those in the first embodiment, and in addition, screw insertion holes (not shown) are newly inserted at positions different from the bolt insertion holes 50 and 50 in the receiving portions 46 of the tread plate receivers 31 to 33. Is formed through, and a fixing screw is inserted through the screw insertion hole from the receiving portion 46 and screwed into a portion different from the embedded nuts 18 and 18 of the tread plates 11 to 13, so that the tread plates 11 to 13 can be inserted into the tread plate receivers 31 to 31. It can also be fixed to 33.

(Embodiment 2)
FIG. 13 shows the second embodiment of the present invention. The same parts as those in FIGS. 1 to 12 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the second embodiment, the recessed grooves 19 of the tread plates 11 to 13 in the first embodiment are not provided, and only the embedded nuts 18 and 18 are embedded at predetermined positions. Further, the tread plate receivers 31 to 33 do not have the ridges 54, and the receiving portion 46 is provided with only the mounting portion 48 and the two bolt insertion holes 50 and 50. As a result, the tread plate side positioning portion is composed of two embedded nuts 18 and 18 (embedded nuts) embedded in the tread plates 11 to 13, and the receiver side positioning portion inserts the mounting portion 48 into a bolt insertion hole. It is composed of fixing bolts 51 and 51 that are screwed into the embedded nuts 18 and 18 in a state of being penetrated by 50 and 50 to fix the inner end portions of the tread plates 11 to 13 to the mounting portion 48, respectively. Other configurations are the same as those in the first embodiment.

Also in this embodiment, the same effects as those in the first embodiment can be obtained. In particular, the embedded nuts 18 and 18 embedded in the tread plates 11 to 13 and the bolt insertion holes 50 and 50 of the mounting portions 48 of the tread plate receivers 31 to 33 are inserted and screwed into the embedded nuts 18 and 18. Since the tread plates 11 to 13 are positioned on the tread plate receivers 31 to 33 by the fixing bolts 51 and 51, the tread plate side positioning portion can be easily changed by simply changing the positions of the embedded nuts 18 and 18 on the tread plates 11 to 13. can do.

Further, by screwing and fastening the fixing bolts 51 and 51 to the embedded nuts 18 and 18, the inner end portions of the tread plates 11 to 13 can be placed and fixed on the mounting portions 48 of the tread plate receivers 31 to 33. The embedded nuts 18 and 18 and the fixing bolts 51 and 51 for fixing the tread plates 11 to 13 to the tread plate receivers 31 to 33 can also be used as the tread plate side positioning portion and the receiver side positioning portion, respectively.

Further, since there are no concave grooves 19 of the tread plates 11 to 13 and ridges 54 of the tread plate receivers 31 to 33, the structure can be simplified by the amount that they are omitted.

(Other embodiments)
In the above embodiment, only the mounting portion 35 attached to the rear surface of the core pillar 1 of the tread plate receivers 31 to 33 (the fixing portion 43 of the attachment 40 in the first stage tread plate receivers 31 to 33) is in the vertical direction from the receiving portion 46. It may be extended to a vertically long shape, and in the mounted state, it may come into contact with the mounting portion 35 of the tread plate receivers 31 to 33 adjacent to the upper side or the lower side.

In this way, when the tread plate receivers 31 to 33 are attached to the core pillar 1 in a state of being in contact with the attachment portions 35 of the tread plate receivers 31 to 33 adjacent to the top and bottom, the tread plate receivers 31 to 33 have a reference height. Since it is positioned and attached at the vertical position, the core pillar 1 can be easily positioned in the peripheral direction.

Further, the above embodiment is applied to a round staircase S in which a range of 90 ° in a plan view is raised and lowered by three steps of treads 11 to 13, but the present invention is a round staircase of 90 ° in a plan view. A circular staircase in which multiple steps other than three steps are arranged in an arc shape in a range of 180 °, or a landing with square steps is formed in the middle, and straight stairs are connected to different sides of the steps and oriented. It can also be applied to bent stairs that change by 90 °, folded stairs that change the direction by 180 ° by connecting straight stairs to different parts of the side of the same tread, and tread support according to each tread. It may be provided. For example, when there is only one tread plate around the core pillar 1 in the round stairs, which serves as the landing, one tread plate receiver corresponding to the one tread plate may be provided, and the revolving staircase receiver device may be provided. It will be composed of only one tread support.

The present invention uses one type of tread plate receiver for each tread plate regardless of the core fitting structure and the thickness of the core pillar, and can easily be used regardless of whether the tread plate fitting method is the skirting method or the side plate fitting method. Since the tread can be constructed, it is extremely useful and has high industrial applicability.

S around stairs 1 Core pillar O center 11 1st step tread 12 2nd step tread 13 3rd step tread 15 step nose 16 riser board insertion groove 18 embedded nut (step plate side positioning part)
19 Concave groove (positioning part on the tread plate side)
21 Kick-in plate 23 Left side plate 24 Rear side plate 25 Tread plate insertion groove A Rotating staircase receiver device 31 1st stage tread plate receiver 32 2nd stage tread plate receiver 33 3rd stage tread plate receiver 35 Mounting part 37 Receptor Main body 40 Attachment 43 Fixing part 44 Mounting hole V Mounting screw 45 Groove part 46 Receiving part 48 Mounting part 50 Bolt insertion hole 51 Fixing bolt (positioning part on the receiving side)
54 Convex (positioning part on the receiver side)

Claims (9)

A receiver for a rotating staircase provided with at least one tread plate receiver for supporting the inner end of at least one tread plate which is attached and fixed to the core pillar of the revolving staircase and is arranged around the core pillar with a riser plate interposed therebetween. It ’s a tool device,
The tread plate has a step nose core fitting structure in which a straight line passing through the nose portion of the tread plate is arranged so as to pass through the center of the core pillar, and a straight line passing through the riser plate arranged under the tread plate is the center of the core pillar. It is designed to be constructed on the one hand with the riser core storage structure that is arranged so that it can pass through.
The tread plate has a tread plate side positioning portion provided at a different position for each tread plate.
The tread plate receiver is provided so as to correspond to the tread plate.
The tread plate receiving tool includes a mounting portion that is mounted and fixed at a mounting position corresponding to the tread plate on the core pillar, and a receiving portion that is projected from the mounting portion and receives the tread plate.
The receiving portion includes a receiving portion side positioning portion for positioning the tread plate on the tread plate receiving tool by engaging or screwing with the tread plate side positioning portion of the tread plate having the step nose core accommodating structure or the rise core accommodating structure, and the receiving portion. A mounting portion is provided to mount and fix the inner end portion of the tread plate positioned by the tool-side positioning portion.
At least one of the position of the tread plate side positioning portion in the tread plate and the position of the tread plate side positioning portion in the tread plate receiver in the direction around the core pillar is set according to the core fitting structure and the thickness of the core pillar. Receiving device for stairs around the corner. In claim 1,
The tread plate side positioning portion of the tread plate is a concave groove formed on the lower surface of the tread plate.
The receiver-side positioning portion of the tread plate receiver is a receiver device for rotating stairs, which is a convex strip that fits into the concave groove. In claim 1 or 2,
The tread-side positioning portion of the tread includes multiple embedded nuts embedded in the tread.
The receiver-side positioning portion of the tread plate receiver is a rotating staircase that includes a fixing bolt that is screwed into the plurality of embedded nuts in a penetrating state of the mounting portion to fix the inner end portion of the tread plate to the mounting portion. Receiving device. In any one of claims 1 to 3,
The mounting portion of the tread plate receiver is vertically long so that the upper end portion or the lower end portion abuts on the mounting portion of another tread plate receiver adjacent to the upper or lower side of the mounting portion in a state where it is arranged at the mounting position of the core pillar. A receiver device for stairs that is provided in the shape. In any one of claims 1 to 4,
The attachment portion of the tread plate receiver is a receiver device for a rotating staircase having a groove portion having an L-shaped cross section that engages with the corner portion of the core pillar in a close contact state. A tread plate receiver that constitutes the receiver device for a round staircase according to any one of claims 1 to 5. A circular staircase in which a tread plate is constructed by a tread plate receiver of the receiving device for a rotating staircase according to any one of claims 1 to 5. A method of constructing a round staircase using any one of the round staircase receiver devices according to any one of claims 1 to 5.
After mounting and fixing the tread plate receiver to the core pillar at the mounting part,
A method of constructing a rotating staircase in which a tread plate is positioned and placed on a mounting portion of a receiving portion of the tread plate receiver by a tread plate side positioning portion and a receiving portion side positioning portion and fixed. A method of constructing a round staircase using any one of the round staircase receiver devices according to any one of claims 1 to 5.
The tread plate was positioned and placed on the mounting portion of the receiving portion of the tread plate receiver in a state where it was not attached to the core pillar by the tread plate side positioning portion and the receiving portion side positioning portion, and the tread plate was fixed to the tread plate receiving portion. rear,
A method of constructing a rotating staircase in which a tread plate receiver to which the above tread plate is fixed is attached and fixed to a core pillar at a mounting portion.

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