JP5683683B2 - Stair structure, fixture, and method for assembling stair structure - Google Patents

Description

  The present invention relates to a staircase structure, a fixture, and a method for assembling a staircase structure, which includes a tread board and a girder board, a side board, or the like and does not include a kick board.

In recent years, exposed stairs (open stairs) have been used as stairs installed indoors.
FIG. 20 is a perspective view showing a configuration of a conventional exposure staircase.
The conventional exposed staircase is fixed in a staircase pattern on two girders 91 and 91 that are spanned diagonally between the floor of the first floor and the second floor of the building, for example. Are provided with a plurality of treads 92, 92,.

  Each of the girder plates 91 is formed with a number of tread plate support portions 911, 911,... Equal to the number of tread plates 92, 92,. Two rectangular cutout portions 921 and 921 adjacent to each other in the longitudinal direction are formed on the long side portion of each tread plate 92. Each tread board support portion 911 has a tread board mounting surface 91a on which the lower surface of the tread board 92 is placed and an outer method corresponding to the inner method of the notch 921, and is fitted to the notch 921. Part 91b.

An operator who installs an exposed staircase at a predetermined staircase installation place first installs the girders 91 and 91 separately in the left-right direction between the first floor and the second floor of the building.
Next, the operator applies an adhesive to the pair of left and right tread board support portions 911 and 911, and then the lower surface of the tread board 92 indicated by a two-dot chain line in the drawing is placed on the tread board placement surface 91a, and the notch 921 is formed. Is fitted into the girder plates 91 and 91 in the direction of the white arrow in the figure so as to be fitted into the fitting portion 91b.

By the way, there has been proposed an exposed staircase in which a plurality of treads are fixed in a staircase pattern to one or two girder plates using fixing members separate from the girder plate and the tread plate (Patent Document 1). To 6).
Furthermore, an exposed staircase has been proposed in which a tread is placed on a receiving portion that is provided integrally with the spar (see Patent Document 7).

  The exposed staircase as described above is more decorative and more open than the box staircase (that is, a staircase with one or both sides attached to the wall and provided with a kick board). Therefore, it is often installed in a space where decoration and a feeling of openness are preferred, such as a living room.

JP 2006-322304 A JP 2006-177053 A JP 2006-97384 A JP 2006-97383 A JP 2005-315031 A JP 2008-184811 A JP-A-2005-30082

However, in the case of the conventional exposed staircase as shown in FIG. 20, the notch portions 921 and 921 are recessed from the long side portion of the tread plate 92 to the central portion in the short side direction. There is a problem that the strength is lower than the tread of the board.
Further, since the tread plate support portion 911 corresponding to one notch portion 921 must be formed by processing the end surface and both sides of the long side portion of the girder plate 91, the number of man-hours and productivity are high. There is a problem of being bad.

In general, the girders 91 and the treads 92 are each carried into the staircase installation place of the exposed staircase with the treadboard support portions 911 and the notches 921 formed in the factory. That is, the distance between the notches 921, 921 is constant. However, the distance between the pair of left and right treadboard support portions 911 and 911 of the girders 91 and 91 may not be constant due to warpage of the girders 91 and distortion of the staircase installation location. In this case, there arises a problem that the tread plate 92 cannot be fitted into the girders 91 and 91.
Further, since the girder plate 91 interferes with the tread plate 92 at the portion where the tread plate support portion 911 and the cutout portion 921 are fitted, the illusion that the area of the upper surface of the tread plate 92 is smaller than the actual is struck. There is a problem that the user receives an impression that the size is narrow.

  If it is the exposure staircase of patent documents 1-7, the conventional exposure staircase as shown in FIG. 20 (namely, the step board 92 which has the notch parts 921 and 921 will be replaced with the girder board 91 which has the tread board support parts 911 and 911. , 91, and the configuration is different from the exposed staircase), and the above-described problem does not occur.

However, in the exposed staircase described in Patent Document 2, the left and right ends of the tread board are installed because the girder board (stair girder) is installed in a distorted state, or the dimensions of each tread board vary. There is a possibility that a gap is generated between the end locking piece of the fixing tool (fixing plate). In this case, the beauty of the exposed stairs deteriorates.
Moreover, since the fixing tool is fixed to the girder plate only by screwing, it is necessary to support the load applied to the tread board and transmitted to the fixing tool with only the screw. That is, there is anxiety about the strength against the load.

The exposed staircase described in Patent Document 3 has two types of fixtures (tread plate holders and tread plate clamps) that are completely different from each other in order to fix the tread plate to the girder (girder). Need. For this reason, the number of parts of the exposure stairs is large, and the assembly procedure is complicated. As a result, such an exposed staircase has a problem that productivity and workability are poor.
In the exposed staircase described in Patent Document 4, since the fixing tool (step board receiving tool) is fixed to the girder board (girder) only with screws, the load applied to the tread board and transmitted to the fixing tool, It is necessary to support only with screws. That is, such an exposed staircase is uneasy about strength against load.

The exposed staircase described in Patent Document 5 uses a simple T-shaped fixing tool (step board receiving material), but the structure of the girder plate (side girder) to which the fixing tool is to be attached is complicated.
In the exposed staircase described in Patent Document 7, the shape of the girder plate (salad girder) is complicated because no fixture is used.
Therefore, the exposure stairs described in Patent Documents 5 and 7 have a problem that productivity is poor.

  The exposed staircase described in Patent Document 1 uses one type and a simple angle-shaped fixture (mounting bracket). The girder plate (girder) is formed with a recess having a simple shape such as a trapezoidal shape, a parallelogram shape, or a triangular shape having a depth equal to the plate thickness of one side surface portion of the fixture. Since the fixture is screwed with most of one side part fitted in the recess of the girder, the load applied to the tread plate and transmitted to the fixture is not limited to the screw but in the recess of the girder. It can be supported even on the lower surface, and, for example, the strength against the load is improved as compared with the exposed steps described in Patent Documents 2 and 4.

However, since the recessed part of a digit board requires the opening area which can fit most one side parts of a fixing tool, it takes time and effort to process a digit board. For this reason, it is desirable to further reduce processing time.
In addition, the inner and lower surfaces of the recesses of the girder plate have a depth equal to the plate thickness of the fixture, and therefore have a small area. For this reason, it is desirable to further improve the strength against the load by devising so that the load applied to the tread board and transmitted to the fixture can be supported over a wide area.

In order to eliminate such inconvenience, it is conceivable to use an exposure stair described in Patent Document 6. This exposed staircase is formed by using one type and a simple angle-shaped fixture (tread board joint). As for a fixing tool, one side part (side girder fixed piece) is screwed to a tread board, and the girder board (side girder) is screwed to the other side part (side girder fixed piece). A tongue-like protruding portion (load receiving piece) is provided on the peripheral edge of the other side surface of the fixture, and the protruding portion is a fitting groove (connector fitting groove) formed on the girder plate. ).
Since the opening area of the fitting groove is narrow, the processing of the girder plate is easy. Moreover, the load applied to the tread can be supported by a wide area on the inner and lower surfaces of the fitting groove.

Further, the fitting groove opens not only on one surface of the girder but also on the side end surface on the upper side of the girder. Accordingly, the protruding portion of the fixture can be slid from the near side of the beam plate to the far side to be fitted into the fitting groove.
However, in order to improve the appearance of the exposed staircase, it is desirable that the fitting groove is not opened on the side end face of the beam plate.
Furthermore, the exposed staircase described in Patent Document 6 has a beautiful appearance of the exposed staircase when a gap is generated between the left and right end portions of the tread plate and the tread plate positioning piece and the tread plate lift prevention piece of the fixture. There is a problem of getting worse.

  Furthermore, the size of the fitting groove as described in Patent Documents 1 and 6 is slightly larger than the size of the protruding portion in order to facilitate the fitting of the protruding portion into the fitting groove. Therefore, since the fixing tool is easily rattled until the fixing tool is screwed after the protruding portion is inserted into the fitting groove, the workability may be deteriorated.

  The present invention has been made in view of such circumstances. The main object of the present invention is to provide a first and second protrusions that protrude outwardly longer than the thickness of the angle at the tip and outer surfaces of one side surface of the angle-shaped fixture. The second protruding piece is integrally provided, and one side portion of the fixture is screwed to the beam plate in a state where the protruding piece is fitted into the fitting groove formed in the beam plate, and then the other side surface. By adopting a structure in which the part is screwed to the tread, the productivity and workability are high, the aesthetics and the strength against the load can be improved, respectively, and the rattling of the fixture can be suppressed. To provide a staircase structure, a fixture, and a method for assembling a staircase structure.

  Another object of the present invention is that the first projecting piece and the second projecting piece are arranged in a direction intersecting each other, and the first and second fitting grooves are opened only on one surface of the beam plate. Accordingly, it is an object of the present invention to provide a staircase structure that can further improve the aesthetics and the strength against load.

  Still another object of the present invention is to have one side face screwed to the girder and the other side face screwed to the tread board, and the first and second end portions and the outer surface of the one side face portion. An object of the present invention is to provide a fixture capable of constituting a staircase structure using a girder plate and a tread board by providing a protruding piece.

The staircase structure according to the first aspect of the present invention has one or two staircase structures in which a longitudinal direction is inclined and one surface is inclined in a vertical posture between the upper stage and the lower stage of a building having an upper stage and a lower stage. A plurality of step plates, a plurality of step plates fixed in a staircase in a lateral position and in a non-contact manner with the step plates, and each step plate being fixed to the beam plate, There are screwing on the one surface, meet staircase structure other side portion and a angle-shaped fixture that is screwing the lower surface of the tread plate, the fixture, the other side surface portion, said In a state where the outer surface of the other side surface portion and the lower surface face each other, the first protruding piece that is screwed to the lower surface and protrudes outside the angle longer than the thickness of the angle is the one side surface portion. It is integrally provided at the tip and protrudes outside the angle longer than the thickness. The second projecting piece is integrally provided on the outer surface of the one side surface portion other than the tip portion, and the girder has a width corresponding to the thickness of the first and second projecting pieces. And first and second fitting grooves into which the first and second projecting pieces are fitted are formed on the one surface.

  In the staircase structure according to the second aspect of the invention, the first protruding piece is arranged in a direction along the other side surface portion, and the second protruding piece is arranged in a direction intersecting with the other side surface portion. The first and second fitting grooves are open only on the one surface.

Fixture according to the third invention, the step board to be provided is the step structure, to secure the girder to the step structure is provided, in a fixture that is without the angled, the angle being screwing on the girder and one side surface, and a other side of the angle to be screw fastened to said tread plate with its outer surface is facing the tread plate, first projecting outwardly of said angle greater than a thickness of the angle The protruding piece is integrally provided at the distal end portion of the one side surface portion, and the second protruding piece that protrudes to the outside of the angle longer than the thickness is the one side surface portion other than the distal end portion. It is characterized by being provided integrally on the outer surface of the.

A method for assembling a staircase structure according to a fourth aspect of the present invention is such that a longitudinal direction is inclined and one surface is obliquely arranged in a vertical posture between the upper stage and the lower stage of a building having an upper stage and a lower stage. One or two girder plates, a plurality of tread plates that are fixed to the girder in a stepwise manner in a lateral position and not in contact with the tread plates, and each tread plate is fixed to the girder plate, An assembling method of a staircase structure comprising an angle-shaped fixing tool having one side face screwed to the one surface and the other side face screwed to the lower surface of the tread. A first protruding piece that protrudes outward from the angle longer than the thickness of the first side is integrally provided at the tip of the one side surface, and protrudes outward from the angle longer than the thickness. The two protruding pieces are integrally formed on the outer surface of the one side surface portion other than the tip portion. First, a fixed fixture is prepared, and the girders have a width corresponding to the thickness of the first and second projecting pieces, and the first and second projecting pieces are fitted into the first. And one or two girder plates in which the second fitting groove is formed on the one surface, the girder plate is inclined in the longitudinal direction between the upper stage and the lower stage, In addition, the first surface is inclined so that the one surface is in a vertical posture, the first and second projecting pieces are inserted into the first and second fitting grooves, and the one side surface portion is screwed to the one surface. The outer surface of the other side surface portion faces the lower surface, the tread plate is placed on the other side surface portion, and the other side surface portion is screwed to the lower surface.

In the first invention, the step structure is provided with one or two girders, and a plurality of step boards, further, a third shot light fixture comprises at least one for each step board . Further, in the fourth invention, girders, with step board, and a third shot light fixture, staircase structure of the first invention is assembled.
The fixing tool is for fixing the tread plate to the girder plate with screws. The fixture is in the form of an angle having one side and the other side. Furthermore, the fixture has first and second projecting pieces.

The first projecting piece is integrally provided at the tip of the one side surface portion, and projects to the outside of the angle longer than the thickness of the angle. The second protruding piece is integrally provided on the outer surface of the one side surface portion, and protrudes to the outside of the angle longer than the thickness of the angle.
Such a fixture has a simple shape. And since the edge part of a tread is not arrange | positioned facing a fixing tool, a space | gap does not arise between a fixing tool and the edge part of a tread. Therefore, a covering member for hiding the void is unnecessary. That is, the number of parts constituting the fixture is small. Therefore, the fixture is highly productive.

Below, regarding the girder plate, one surface on which one side portion of the fixture is screwed is referred to as a screw surface.
The girder has a longitudinal direction inclined at a predetermined angle between the upper and lower stages (for example, the second floor and the first floor) of the building, and the screw surface is obliquely installed in a vertical posture.
When there are two girder plates, the two girder plates are often arranged so that their screw surfaces are either the inner surfaces or the outer surfaces. On the other hand, when there is one girder plate, both sides of one girder plate are often used as screw surfaces, but a girder plate and other than the girder plate (for example, pillars) may be combined. Thus, since the number of girders and the direction of the screw surface are not limited, the degree of freedom in designing the staircase structure is high.

First and second fitting grooves to which the first and second projecting pieces of the fixture are to be fitted are formed on the screw surface of the beam plate. Each fitting groove has a width corresponding to the thickness of each protruding piece. That is, each fitting groove may be a simple shape having a straight line shape and a simple shape having a necessary and sufficient dimension for fitting with each protruding piece. Since such a fitting groove can be easily formed in a short time, the processing time is reduced. Furthermore, since it is not necessary to form a concave portion or a convex portion other than the fitting groove in order to attach the fixture to the girder, the configuration of the girder is simple and the shape is simple. Therefore, the girder is highly productive.
In addition, the depth of each fitting groove should just be more than the protrusion amount of each protrusion piece.

When the girder plate is produced at a factory, for example, the fitting groove is formed with high accuracy. Therefore, the fixing member can be accurately positioned by fitting the protruding piece into the fitting groove. That is, the fitting groove contributes to improvement in workability.
The plurality of treads are fixed to the girders in a stepwise manner in a horizontal posture. For this purpose, the number of fixtures corresponding to the number of treads is used for one screw surface. Further, on the screw surface, fitting grooves in which the protruding pieces of the plurality of fixtures are to be fitted are arranged in a step shape.

An operator who assembles the staircase structure inserts the first and second protruding pieces of the fixture from the distal end portion to the proximal end portion into the first and second fitting grooves. At this time, since the first and second projecting pieces are supported at two points by the inner surfaces of the first and second fitting grooves, for example, only the first projecting piece is the inner surface of the fitting groove. As compared with the case where one point is supported by the fixing tool, the fixing tool is less likely to rattle.
Next, the operator screws one side portion of the fixing tool onto the screw surface of the girder plate. As a result, the fixture is attached to the beam plate in a state where each protruding piece is fitted in each fitting groove. In this way, the fixture attached to the girder has improved strength against the load compared to a fixture attached to the girder only by screwing as described in Patent Documents 2 and 4, for example. ing.

Next, the operator places the outer surface (that is, the upper surface) of the other side surface portion of the fixing tool on the lower surface of the tread plate, and places the tread plate on the other side surface portion. Screw on the bottom of the. As a result, the tread is fixed to the girder. Therefore, a plurality of types of fixing tools such as a fixing tool for receiving the tread board and a fixing tool for holding the tread board are unnecessary.
The above staircase structure may be an exposed staircase arranged from the top to the bottom of the building, a part of the staircase where a part is an exposed staircase and the rest is a box staircase. Also good. Further, a stepped staircase structure having a folded portion for changing the direction in the middle from the upper stage to the lower stage may be used.

In the second invention, the first protruding piece of the fixture is arranged in a direction along the other side surface portion, and the second protruding piece is arranged in a direction intersecting with the other side surface portion.
The first and second fitting grooves are opened only on the screw surface of the beam plate. In other words, each fitting groove does not open on the side end face of the beam plate. As a result, the length of each fitting groove only needs to be the minimum necessary to correspond to the length of each protruding piece, so that the productivity of the girders is further improved, and the strength deterioration of the girders is suppressed, Furthermore, the beauty of the staircase structure is improved.
At this time, the operator inserts each protruding piece into each fitting groove by moving the fixing tool in a direction crossing the screw surface of the beam plate.

  By the way, the 1st protrusion piece protrudes longer than the thickness of an angle. Moreover, the 1st fitting groove should just have the depth more than the protrusion amount of a 1st protrusion piece. For this reason, the inner and lower surfaces of the first fitting groove have a large area. Accordingly, the load applied to the tread board and transmitted to the fixture is supported by the screw and the wide inner and lower surfaces of the first fitting groove.

Staircase structure of the first invention, in the case of the third shot light fixture, and method of assembling the staircase structure of the fourth aspect of the present invention, since the step board is fixed to the girder with a fastener, fitted and fixed the treadle to girder It is not necessary to form a notch for the tread on the tread. Therefore, the strength of the tread is not weakened.
Further, since it is not necessary to process both sides of the girder for each fixture, the number of steps is small and the productivity is high.
In addition, when the protruding pieces of the fixture are fitted in the fitting grooves of the beam plate, the rattling of the fixture can be suppressed.

Each of the girder plate, the tread plate, and the fixture is produced, for example, in a factory, and is carried into a staircase installation place. Since the fixing screws for the treads are installed not at the factory but at the stair installation location, for example, when fixing the treads to two girder plates, the distance between the two girder plates installed at the stair installation location Accordingly, the two fixing tools are spaced apart and screwed to the tread. Therefore, even if the distance between the girder plates is different at each position in the vertical direction, the tread plate can be fixed to the girder plate without any problem.
Moreover, since a space | gap does not arise between the one side part of a fixing tool, and the opposing edge part of a tread, the aesthetics of a staircase structure can be improved.

  Furthermore, since the fixing tool is arranged on the lower side of the tread board and the tread board is not fitted and fixed to the girder board, the tread board and the girder board do not interfere with each other. As a result, the user has the impression that the area of the upper surface of the tread board observed by the user and the actual area sensuously coincide with each other and the scaffold is wide.

Furthermore, since the load applied to the tread board and transmitted to the fixture can be supported by the screw and the inner and lower surfaces of each fitting groove, the load can be supported stably.
Further, the staircase structure of the present invention has fewer parts than the exposed staircase that requires two types of fixtures as described in Patent Document 3, and as described in Patent Documents 5 and 7. Compared to an exposed staircase that requires a complicatedly constructed spar, the spar is simpler.
As a result, the staircase structure of the present invention can improve productivity and workability.

In the case of the staircase structure according to the second aspect of the invention, since there is no opening on the side end face of the beam plate, the aesthetic appearance of the staircase structure can be further improved.
Moreover, since the load can be received over a wide area, the strength against the load can be further improved.

It is a perspective view which shows the structure of the staircase structure which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the structure of the staircase structure concerning Embodiment 1 of this invention. It is a front view which shows the structure of the part by which the vertical surface part of the one fixing tool which concerns on Embodiment 1 of this invention, and the one end part of a tread board are opposingly arranged. It is a perspective view which shows the structure of the one fixing tool concerning Embodiment 1 of this invention. It is explanatory drawing of the assembly method of the staircase structure which concerns on Embodiment 1 of this invention. It is a perspective view which shows the structure of the other fixing tool concerning Embodiment 1 of this invention. It is a perspective view which shows the structure of the further another fixing tool concerning Embodiment 1 of this invention. It is a perspective view which shows the structure of the further another fixing tool concerning Embodiment 1 of this invention. It is a perspective view which shows the structure of the one fixing tool concerning Embodiment 2 of this invention. It is a perspective view which shows the structure of the other fixing tool concerning Embodiment 2 of this invention. It is a perspective view which shows the structure of the further another fixing tool concerning Embodiment 2 of this invention. It is a perspective view which shows the structure of the further another fixing tool concerning Embodiment 2 of this invention. It is a perspective view which shows the structure of the further another fixing tool concerning Embodiment 2 of this invention. It is a perspective view which shows the structure of the staircase structure concerning Embodiment 3 of this invention. It is a longitudinal cross-sectional view which shows the structure of the staircase structure concerning Embodiment 3 of this invention. It is a perspective view which shows the structure of the fixing tool which concerns on Embodiment 3 of this invention. It is explanatory drawing of the assembly method of the staircase structure which concerns on Embodiment 3 of this invention. It is a perspective view which shows the structure of the staircase structure concerning Embodiment 4 of this invention. It is a perspective view which shows the structure of the fixing tool concerning Embodiment 5 of this invention. It is a perspective view which shows the structure of the conventional exposure staircase.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

Embodiment 1.
1 and 2 are a perspective view and a longitudinal sectional view showing the configuration of the staircase structure S1 according to Embodiment 1 of the present invention. However, FIG. 2 shows a cross-sectional view taken along line II-II in FIG. 1 and 2 show a state in which the two treads 10 and 10 are fixed in a stepwise manner in the horizontal posture between the side plates 11 and 12, respectively.
FIG. 3 shows a portion where a vertical surface portion 21 (see FIG. 4), which will be described later, of the one fixture 2 according to Embodiment 1 of the present invention and one end portion (opposing end portion) 10c of the tread board 10 are arranged to face each other. It is a front view which shows a structure. FIG. 3 includes a vertical cross-sectional view at the position where the insertion hole 51 is formed as a vertical cross-sectional view of the wall W of the building, gypsum boards P1 and P2 (see FIG. 1) described later, and the side plate 11.

FIG. 4 is a perspective view showing the configuration of the fixtures 2 and 2.
FIG. 5 is an explanatory diagram of the assembling method of the staircase structure S1 according to the first embodiment of the present invention. However, FIG. 5 illustrates the attachment of the side plate 11 to the wall W, the attachment of the fixture body 20 to the side plate 11, the attachment of the tread plate 10 to the fixture body 20, and the attachment of the covering member 31 to the fixture body 20. ing.

The staircase structure S1 is installed indoors in a two-story building, for example, and constitutes a so-called exposed straight staircase (see FIG. 1). The user of the staircase structure S1 moves back and forth between the horizontal floor F on the first floor and the floor (not shown) on the second floor by moving up and down the staircase structure S1. The staircase structure S1 is installed at a predetermined staircase installation position so as to have a predetermined inclination angle with respect to the floor surface F.
Here, the second floor and the first floor of the building function as the upper and lower tiers of the building in the embodiment of the present invention.

This building has walls W, W facing each other between the first floor and the second floor (see FIGS. 1 and 3), and on one wall W, side plates 11 and gypsum boards P1, P2 and The side wall 12 and the gypsum boards P1 and P2 are attached to the other wall W.
Each of the gypsum boards P1 and P2 is a plate material having a sound insulating property and a heat insulating property, and makes up one surface of the wall W.
The staircase structure S1 includes two side plates 11, 12, N step plates 10, 10,... And {N × 2} fixtures 2, 2,. Here, “N” is a natural number of N ≧ 2.

Hereinafter, the front side, the back side, the left side, and the right side as viewed from the first floor to the second floor are referred to as the front side, the rear side, the left side, and the right side of the staircase structure S1. That is, the walls W, W are opposed to each other with an appropriate distance in the left-right direction. The side plate 11 is attached to the left wall W, and the side plate 12 is attached to the right wall W.
In the following, it is assumed that the sizes of the screws V, V,... For assembling the staircase structure S1 are equal to each other. For example, screws V, V,... For fastening the side plates 11, 12 to the walls W, W, respectively, and screws V, V,... For fastening the fixture 2 to the side plates 11, 12, respectively, The screws V, V,... For screwing the tread board 10 to the fixture 2 may be different in size from each other.

First, the tread 10 will be described with reference to FIGS. 1 to 3 and 5.
Each tread board 10 has a rectangular plate shape having an upper surface 10a and a lower surface 10b, and is made of wood or wood. Each of the upper surface 10a and the lower surface 10b is horizontally arranged.
An anti-slip may be provided on the upper surface 10a. Two positioning recesses may be formed on the lower surface 10b. The dimension and shape of each positioning recess are substantially the same as the dimension and shape of a horizontal plane portion 22 (see FIG. 4) described later, and the horizontal plane portions 22 and 22 are fitted into the two positioning recesses so that the horizontal plane portions 22 and 22 are fitted. It is arranged to be positioned accurately.
Furthermore, the tread board 10 is not limited to wood or a wood material, For example, the structure which uses aluminum or glass etc. may be sufficient.

Next, the side plates 11 and 12 will be described with reference to FIGS. 1 to 3 and FIG. Since the configuration of the side plate 12 corresponds to the configuration of the mirror image of the side plate 11, the side plate 11 will be mainly described below.
The side plate 11 corresponds to the plate member in the embodiment of the present invention, and is made of wood or wood. The side plate 11 is shaped like a trapezoid by cutting both longitudinal ends of a rectangle having a large aspect ratio.
One end surface of the two short sides of the side plate 11 is arranged along the floor surface F.

Of the two long sides of the side plate 11, the longer one is arranged upward and the shorter one is arranged downward. Hereinafter, a long side portion arranged upward (or downward) is referred to as an upper side portion (or lower side portion).
The angle formed between the short side portion and the upper side portion arranged on the lower side of the side plate 11 is equal to the inclination angle of the staircase structure S1.
One surface of the side plate 11 is used as a screw surface 11a. For this purpose, N insertion holes 51, 51,... Arranged in a step shape are formed in the screw surface 11a at positions corresponding to the fixed positions of the N treads 10, 10,.

The insertion holes 51, 51,... Have the same rectangular shape.
In each insertion hole 51, the inner upper surface and the inner lower surface are horizontal surfaces, and the inner front surface, the inner rear surface, and the inner rear surface 51a are vertical surfaces.
Such an insertion hole 51 is opened only on the screw surface 11a, and is opened on the other surface of the side plate 11 (for example, the end surfaces of the upper side portion and the lower side portion of the side plate 11, respectively, that is, the side end surface of the side plate 11). Not done.

  Further, the depth of the insertion hole 51 is substantially equal to the protrusion amount of the protrusion 23 (see FIG. 4) of the fixture 2. More specifically, the depth of the insertion hole 51 is slightly longer (for example, about 1 mm) than the protruding amount of the protruding portion 23. This is because if the depth of the insertion hole 51 is equal to or less than the protrusion amount of the protrusion 23, the protrusion 23 cannot be completely inserted into the insertion hole 51 from the distal end portion to the proximal end portion, or the insertion is difficult. It is. Here, the protruding amount of the protruding portion 23 is sufficiently longer than the thickness of the fixture body 20 of the fixture 2.

  Furthermore, the area of the inner back surface 51 a of the insertion hole 51 is larger than the projected area of the protruding portion 23 on the side plate 11. This is because the staircase structure S <b> 1 is one of the features that the side plate 11 is screwed to the wall W at the inner back surface 51 a of the insertion hole 51. At this time, for each insertion hole 51, two screws V, V are spaced apart in the front-rear direction.

  More specifically, the longitudinal direction of the insertion hole 51 is slightly longer than the length of the protrusion 23 in the longitudinal direction (hereinafter referred to as depth). This is because if the inner method in the front-rear direction of the insertion hole 51 is equal to or less than the depth of the protrusion 23, the protrusion 23 cannot be completely inserted into the insertion hole 51 or is difficult to insert. Further, even if the lengthwise direction of the insertion hole 51 is excessively longer than the depth of the protruding portion 23, it is not only useless, but positioning of the protruding portion 23 in the front-rear direction becomes difficult, and the strength of the side plate 11 is increased. This is because of a decrease. Here, the depth of the protrusion 23 is sufficiently longer than the sum of the outer diameters of the screw heads of the two screws V and V and the separation distance of the screws V and V.

Furthermore, the inner method in the vertical direction of the insertion hole 51 is sufficiently longer than the sum of the thickness of the protrusion 23 and the outer diameter of the screw head of the screw V. However, the internal method in the vertical direction of the insertion hole 51 is equal to or less than the sum of the thickness of the horizontal surface portion 22 and the protruding amount of the vertical surface portion 21 (see FIG. 4).
In other words, the space inside the insertion hole 51 excluding the space in which the protrusion 23 is inserted (that is, the space in which the protrusion 23 is not inserted) has a size suitable for screwing using the screws V and V. Have. Furthermore, the opening of the insertion hole 51 is covered with the fixture 2 and the tread board 10 so as not to be exposed to the user's field of view.
The shape and forming position of each of the insertion holes 51, 51,... Can be formed with high accuracy using an NC router, for example, in a factory that produces plate materials.

  The plate thickness of the side plate 11 at the position where the insertion hole 51 is formed is sufficiently thick. For this reason, it is suppressed that the side plate 11 is damaged and destroyed by the external force applied to the side plate 11 when the side plate 11 is screwed or when the staircase structure S1 is used.

On the other hand, the other surface of the side plate 11, that is, the surface opposite to the screw surface 11 a (hereinafter, referred to as the back surface of the side plate 11) is closely attached to one surface of the wall W. Concave portions (so-called “shackles”) corresponding to the thicknesses of the gypsum boards P1 and P2 are formed on the upper and lower sides of the back surface of the side plate 11, respectively. For this reason, the longitudinal section of the side plate 11 has a rollover convex shape.
In the side plate 11 as described above, the screw surface 11a is arranged in a vertical posture between the first floor and the second floor of the building.

The side plate 12 corresponds to a plate member in the embodiment of the present invention, and is made of wood or a woody material, like the side plate 11.
One surface of the side plate 12 is used as a screw surface 12 a, and the screw surface 12 a corresponds to the screw surface 11 a of the side plate 11. Therefore, N insertion holes 51, 51,... Arranged in a step shape are formed in the screw surface 12a at positions corresponding to the fixed positions of the N treads 10, 10,.

In the side plate 12 as described above, the screw surface 12a is arranged in a vertical posture between the first floor and the second floor of the building.
At this time, the screw surface 11a of the side plate 11 and the screw surface 12a of the side plate 12 are arranged to face each other vertically and parallel to each other. That is, the screw surfaces 11a and 12a of the staircase structure S1 are inward.
In addition, the side plates 11 and 12 are not limited to the structure which uses wood or a wooden material.

Next, the fixture 2 will be described with reference to FIG.
The fixture 2 includes a metal fixture body 20 and a synthetic resin covering member 31, and fixes the tread board 10 to the side plate 11 or the side plate 12. A fixture 2 for fixing the tread plate 10 to the side plate 11 (ie, a fixture 2 arranged on the left side of the tread plate 10) and a fixture 2 for fixing the tread plate 10 to the side plate 12 (ie, a fixture arranged on the right side of the tread plate 10) 2) has the same configuration. For this reason, below, the fixture 2 which concerns on the side plate 11 is illustrated.
The fixture body 20 is not limited to a metal one, and the covering member 31 is not limited to a synthetic resin one.

The fixture body 20 is formed in an L-shaped angle shape having a thickness of about 5 mm, and integrally includes the vertical surface portions 21, 21, the horizontal surface portion 22, and the protruding portion 23. The fixture body 20 is formed by bending a metal flat plate cut into an appropriate shape, but may be formed by molding using metal.
The vertical surface portions 21 and 21 function as one side surface portion of the angle and are arranged vertically. The horizontal surface portion 22 functions as the other side surface portion of the angle and is disposed horizontally.

  The horizontal plane portion 22 has a rectangular shape, and one long side portion of the rectangle corresponds to the base end portion of the horizontal plane portion 22. A plurality of screw holes spaced from each other by an appropriate length are formed in the horizontal plane portion 22. Such a horizontal surface portion 22 is screwed to the tread plate 10 using screws V, V,... With the inner surface 22 a of the horizontal surface portion 22 and the lower surface 10 b of the tread plate 10 facing each other. The depth of the horizontal plane portion 22 is substantially equal to the depth of the tread board 10.

  Each of the vertical surface portions 21 and 21 has a rectangular shape, and protrudes at right angles to the front end portion and the rear end portion of the base end portion of the horizontal surface portion 22. Each vertical surface portion 21 is formed with a plurality of screw holes spaced from each other by an appropriate length. Each of the vertical surface portions 21 and 21 is screwed to the side plate 11 using screws V, V,... With the outer surface of the vertical surface portions 21 and 21 and the screw surface 11a of the side plate 11 facing each other. The screwing positions of the vertical surface portions 21 and 21 on the side plate 11 are the front and rear of the peripheral edge portion of the insertion hole 51. The amount of protrusion from the inner surface 22 a of the horizontal surface portion 22 of each of the vertical surface portions 21 and 21 is substantially equal to the thickness of the tread plate 10. Further, the thickness of each of the vertical surface portions 21 and 21 is equal to the thickness of the horizontal surface portion 22.

  The protruding portion 23 has a rectangular tongue shape, and protrudes from the central portion of the base end portion of the horizontal plane portion 22 to the outside of the angle (that is, the outside of the L shape) longer than the thickness of the angle. The protruding position of the projecting portion 23 at the base end portion of the horizontal surface portion 22 is intermediate between the protruding positions of the vertical surface portions 21 and 21. Each of the upper surface and the lower surface of the protrusion 23 and the inner surface 22a and the outer surface of the horizontal surface portion 22 are coplanar. The thickness of the protruding portion 23 is equal to the thickness of the horizontal surface portion 22.

The covering member 31 is in the shape of a strip formed in a generally U-shape and has elasticity. For this reason, the thickness of the covering member 31 is appropriately thin.
As shown in FIGS. 1 to 3, the covering member 31 includes a vertical surface portion 21, 21 and an opposed end portion 10 c of the tread plate 10 (that is, an end portion disposed opposite to the vertical surface portions 21, 21 of the tread plate 10). The space is covered from above so as to be sandwiched between front and back.

  For this purpose, as shown in FIG. 4, the covering member 31 includes an elongated strip-shaped first covering portion 311 that covers the upper end surfaces of the vertical surface portions 21 and 21 and the upper surface 10 a of the opposed end portion 10 c of the tread plate 10, and a vertical surface portion. Band-shaped second covering portions 312 and 312 that cover the front and rear end surfaces of 21 and 21 and the front and rear end surfaces of the opposed end portion 10 c of the tread plate 10, and a locking portion 313 that locks to the outer surface of the horizontal surface portion 22. , 313. The second covering portions 312 and 312 protrude perpendicularly in the same direction from both longitudinal ends of the first covering portion 311, and the locking portions 313 and 313 are directed from the distal end portions of the second covering portions 312 and 312 to each other. Protruding. In addition, the length in the left-right direction of the covering member 31 (that is, the width of the band) is sufficiently longer than the length in the left-right direction of the gap that may occur between the vertical surface portions 21 and 21 and the opposed end portion 10c of the tread plate 10. Compared with the length of the horizontal plane portion 22 in the left-right direction, it is sufficiently short.

Next, an assembling method of the staircase structure S1 will be described with reference to FIGS.
An operator who assembles the staircase structure S1 includes a side plate 11, a side plate 12, N pieces of treads 10, 10,..., {N × 2} fixtures 2, 2,..., Gypsum boards P1, P2, and a plurality of pieces. Prepare screws V, V,. These are produced in advance at the factory and are carried into the staircase installation location.

  First, the operator closes the back surface of the side plate 11 to one surface of the left wall W, and closes the end surface of each short side portion of the side plate 11 to the floor surface F, so The side plate 11 is screwed to the wall W at the surface 51a. As a result, the side plate 11 is provided with the screw surface 11a in a vertical posture between the first floor and the second floor of the building. At this time, the inclination angle in the longitudinal direction of the side plate 11 with respect to the floor surface F is equal to the inclination angle of the staircase structure S1.

  Further, the worker puts the plaster boards P1 and P2 on one surface of the wall W. At this time, the lower end of the gypsum board P1 is fitted into a recess formed in the upper side of the side plate 11, and the upper end of the gypsum board P2 is fitted into a recess formed in the lower side of the side plate 11. . In other words, the side plate 11 is screwed and fixed to the wall W while being sandwiched between the gypsum boards P1 and P2.

The worker attaches the side plate 12 to the right wall W in the same manner as when the side plate 11 is attached to the left wall W. At this time, the screw surface 11a of the side plate 11 and the screw surface 12a of the side plate 12 face each other. At this time, the height from the floor surface F is equal in the inner and lower surfaces of the insertion holes 51 and 51 that are arranged to face each other. Here, the separation distance between the screw surfaces 11a and 12a is compared with the sum of the length in the longitudinal direction of the tread board 10, the thickness of the two vertical surface portions 21 and 21, and the thickness of the screw heads of the two screws V. Slightly longer.
By the way, in this embodiment, the worker attaches the plaster boards P1 and P2 after attaching the side plates 11 and 12 to the walls W and W (after-boarding), but is not limited to this, and the plaster board P1. , P2 may be attached before attaching the side plates 11 and 12 (board attachment).

Next, the worker arranges the fixture body 20 of the one fixture 2 so that the inner surface 22a of the horizontal plane portion 22 faces upward. Then, the operator inserts the protruding portion 23 of the fixture main body 20 into the insertion hole 51 of the side plate 11 from the distal end portion to the proximal end portion, and places the lower surface of the protruding portion 23 on the inner and lower surfaces of the insertion hole 51.
In this state, the operator screws the vertical surface portions 21, 21 to the side plate 11 through screws V, V,..., Which are formed in the vertical surface portions 21, 21, respectively.
The operator repeats the fixing work of the fixing tool body 20 N times.
By the way, since the screws V and V that screw the side plate 11 to the wall W are arranged inside the insertion hole 51, the screws V and V screw the vertical surface portions 21 and 21 to the side plate 11. There is no interference with the screws V, V,.

In addition, the worker arranges the fixture body 20 of the other fixture 2 so that the inner surface 22a of the horizontal plane portion 22 faces upward. Then, the operator inserts the protruding portion 23 of the fixture main body 20 into the insertion hole 51 of the side plate 12 from the distal end portion to the proximal end portion, and places the lower surface of the protruding portion 23 on the inner and lower surfaces of the insertion hole 51.
In this state, the operator screws the vertical surface portions 21 and 21 to the side plate 12 through the screws V, V,... Through the screw holes formed in the vertical surface portions 21 and 21 respectively.
The operator repeats the fixing work of the fixing tool body 20 N times.
As a result, the horizontal plane portions 22 and 22 of the two right and left fixture main bodies 20 and 20 are arranged at the same height from the floor surface F and parallel to the floor surface F.

Next, the operator places the tread board 10 on the horizontal plane parts 22 and 22 with the inner surfaces 22a and 22a of the two horizontal plane parts 22 and 22 facing each other and the lower surface 10b of the tread board 10 facing each other.
In this state, the operator screws the horizontal plane portions 22 and 22 to the tread plate 10 through the screws V, V,... Through the screw holes formed in the horizontal plane portions 22 and 22, respectively.

  At this time, the vertical surface portions 21 and 21 and the opposed end portion 10c of the tread plate 10 are not in close contact with each other. This is because the screw heads of screws V, V,... Are interposed between the surfaces of the vertical surface portions 21 and 21 and the end surface of the opposed end portion 10c. In addition, it is highly likely that the separation distance between the screw surfaces 11a and 12a varies due to warpage of the side plates 11 and 12 or distortion of the installation location. In particular, when the tread board 10 is cut out at the installation site of the staircase structure S1, the length in the left-right direction of the tread board 10 may be somewhat shortened. As a result, an unsightly gap may occur between the fixture main body 20 and the tread board 10.

  Therefore, the worker uses the covering member 31 to cover the space between the vertical surface portions 21 and 21 and the opposite end portion 10 c of the tread board 10. At this time, the operator covers the covering member 31 on the opposite end portion 10c from above.

  Specifically, the operator holds the first covering portion 311 on the vertical surface portions 21 and 21 in a state where the engaging portions 313 and 313 are separated by bending the second covering portions 312 and 312 in a direction away from each other. Cover the upper end surface and the upper surface 10a of the opposite end portion 10c, engage one locking portion 313 with the front portion of the outer surface of the horizontal surface portion 22, and engage the other locking portion 313 with the rear portion of the outer surface of the horizontal surface portion 22. Stop. Thereafter, when the covering member 31 returns to its original shape due to elasticity, the first covering portion 311 blinds the space between the vertical surface portions 21 and 21 and the opposite end portion 10c of the tread plate 10 from the upper side, 312 blinds between the vertical surface portions 21 and 21 and the opposite end portion 10c of the tread board 10 from the front side and the back side.

  The worker repeats the mounting operation of the tread board 10 N times and the mounting operation of the covering member 31 {N × 2} times.

The staircase structure S1 as described above can be installed inexpensively in a short time because the assembly method is simple.
Moreover, like a conventional staircase structure, it has a higher decorativeness and a sense of openness than a box staircase. Further, unlike a conventional fitting type step structure in which a tread having a notch is fitted and fixed to a girder having a tread support, each tread 10 is connected to the side plate 11, using a pair of left and right fixtures 2, 2. Therefore, various problems that occur with respect to the fitting type staircase structure (such as the strength of the tread board being weakened by the notch portion and the large number of man-hours for processing the girder plate) do not occur.

Furthermore, the load applied to the tread board 10 and transmitted to the fixtures 2 and 2 includes screws V, V,... That fasten the vertical surface portions 21 and 21 to the screw surfaces 11a and 12a, and the insertion holes 51,. Of the inner and lower surfaces of 51, it is supported by the part where the lower surfaces of the protrusions 23 and 23 are in contact. Since this portion has a large area, the load can be stably supported.
Moreover, since the formation positions of the insertion holes 51 and 51 in the side plates 11 and 12 are accurate, the protruding portions 23 and 23 are inserted into the insertion holes 51 and 51, and the tread plate 10 is placed on the horizontal plane portions 22 and 22. The treads 10 attached to the fixtures 2 and 2 are also arranged at accurate positions. That is, the protrusions 23 and 23 and the insertion holes 51 and 51 are also used for positioning the tread board 10.

Further, since the insertion holes 51 and 51 are not opened except for the screw surfaces 11a and 12a, the insertion holes 51 and 51 are not conspicuous, and the aesthetic appearance can be improved. Further, since the screws V and V that screw the side plate 11 to the wall W are disposed inside the insertion hole 51, the screws V and V are not conspicuous, and the aesthetic appearance can be improved.
Further, the protruding amount of the side plate 11 from the surface of each of the plaster boards P1 and P2 is smaller than the protruding amount of the side plate 11 from one surface of the wall W by the thickness of the plaster boards P1 and P2. For this reason, the thickness of the side plate 11 looks thin to the user. Therefore, the user feels a larger space than when the gypsum boards P1 and P2 are not present.

  In addition, the staircase structure S1 is not limited to the structure provided with the one side plate 11 and 12 each. For example, the staircase structure S1 may be configured such that one is the side plate 11 or the side plate 12 and the other is a housing such as a wall or a column. In this case, the treads 10, 10,... Are fixed to the side plate 11 or the side plate 12 at one end side by the fixtures 2, 2,..., And the other end side is in accordance with a conventional construction method (for example, other than the notch provided in the frame). It is fixed to the housing (by placing the end side).

  The staircase structure S1 is not limited to the exposed straight staircase. For example, part of the staircase structure S1 may be an exposed staircase, and the remaining part may be a box staircase or a platform staircase having a conventional configuration. Alternatively, the staircase structure S1 may constitute a folded staircase or a bent staircase having a landing in the middle, or a rotating staircase. However, the tread boards 10, 10,... Constituting the turning stairs have a triangular shape in plan view. In this case, one side of each of the tread boards 10, 10,... Is fixed to the side plate 11 or the side plate 12 constituting the surrounding staircase, and the top is fixed to, for example, a frame.

Further, the side plates 11 and 12 may be in the form of a wall panel in which one or both covers the walls W and W entirely. Such a side plate 11 (or side plate 12) is also fixed to the wall W with screws. Although the wall panel-shaped side plates 11 and 12 are large-sized, there is an advantage that the user feels a wide space because they are almost completely assimilated with the wall W of the building. Moreover, the gypsum boards P1 and P2 are unnecessary.
Moreover, the side plates 11 and 12 are not limited to the structure attached to the wall W, The structure attached to the pillar of a building may be sufficient.

  Furthermore, the side plates 11 and 12 are not limited to a configuration in which N insertion holes 51 are formed. For example, the side plates 11 and 12 may have a configuration in which n insertion holes 51, 51,... Are formed and {N−n} horizontal groove-shaped insertion holes are formed. Here, “n” is an integer of 0 ≦ n <N. In this case, since the amount by which the side plates 11 and 12 are cut is reduced, the strength of the side plates 11 and 12 is improved. However, the protruding portion 23 is fitted in the insertion groove having a lateral groove shape, and cannot be screwed on the inner back surface of the insertion hole.

  Further, the depth of the insertion hole 51 may be sufficiently longer than the protruding amount of the protruding portion 23. If the depth of the insertion hole 51 is equal to or greater than the sum of the protrusion amount of the protrusion 23 and the thickness of the screw head of the screw V, the tip of the protrusion 23 and the screw head of the screw V are formed inside the insertion hole 51. May be arranged opposite to each other. However, as the insertion hole 51 becomes deeper, the side plate 11 needs to have a plate thickness sufficiently thicker than the depth of the insertion hole 51, and the strength of the side plate 11 decreases. For this reason, it is desirable that the depth of the insertion hole 51 is substantially equal to the protruding amount of the protruding portion 23.

Furthermore, the staircase structure S <b> 1 may include a fixture other than the fixture 2.
6, FIG. 7, and FIG. 8 are perspective views showing configurations of other fixtures 201 and 201, fixtures 202 and 202, and fixtures 2L and 2R according to Embodiment 1 of the present invention.
The structures of the vertical surface portions 21, 21, the horizontal surface portion 22, and the protruding portion 23 of the fixing device 201, the fixing device 202, and the fixing devices 2L, 2R are the vertical surface portions 21, 21, the horizontal surface portion 22, and the protrusion of the fixing device 2, respectively. The structure is the same as that of the portion 23. For this reason, the shape and dimension of the insertion holes 51 and 51 formed in the side plates 11 and 12 may be the same as the shape and dimension of the insertion holes 51 and 51 according to the fixture 2.

However, the fixture 201, the fixture 202, and the fixture body 20 according to each of the fixtures 2 </ b> L and 2 </ b> R have a horizontal piece 24.
Hereinafter, first, the fixture 201 will be described with reference to FIG.
The fixture 201 arranged on the left side of the tread board 10 and the fixture 201 arranged on the right side of the tread board 10 have the same configuration. Each fixture 201 includes a fixture body 20 and two covering members 32 and 32.

  The fixture main body 20 included in the fixture 201 integrally includes vertical surface portions 21 and 21, a horizontal plane portion 22, a protruding portion 23, and a horizontal piece 24. Such a fixture main body 20 is also formed by bending a metal flat plate cut into an appropriate shape, but may be formed by a molding process using metal.

  The horizontal piece 24 has a rectangular tongue shape, and protrudes in parallel to the horizontal plane portion 22 from the tip end portions of the vertical surface portions 21 and 21 to the inside of the angle (that is, the inside of the L shape). Here, the separation distance between the horizontal plane portion 22 and the horizontal piece 24 is slightly longer than the thickness of the tread board 10. Moreover, the horizontal piece 24 is distribute | arranged over both the vertical surface parts 21 and 21. As shown in FIG. Furthermore, the length of the horizontal piece 24 in the left-right direction is sufficiently longer than the length in the left-right direction of the gap that may occur between the vertical surface portions 21, 21 and the opposite end portion 10 c of the tread plate 10, Compared to the length in the direction, it is sufficiently short.

Each covering member 32 is formed in a band shape formed in a U-shape and has elasticity. The covering members 32, 32 cover the vertical surface portions 21, 21 and the facing end portion 10 c of the tread plate 10 from the front side and the back side so as to be sandwiched vertically.
More specifically, the covering member 32 includes a covering portion 321 that covers the front end surfaces (or rear end surfaces) of the vertical surface portions 21 and 21 and the front end surface (or rear end surface) of the opposed end portion 10c of the tread plate 10, and the horizontal piece 24. And engaging portions 322 and 322 that are engaged with the outer surface of the horizontal surface portion 22 and the outer surface of the horizontal surface portion 22. The locking portions 322 and 322 protrude at right angles in the same direction from both longitudinal ends of the covering portion 321.

The attachment of the fixture 201 is substantially the same as the attachment of the fixture 2. However, after attaching the fixture main bodies 20, 20 to the side plates 11, 12, the operator faces the inner surfaces 22 a, 22 a of the two left and right horizontal plane portions 22, 22 and the lower surface 10 b of the tread plate 10, When the tread board 10 is placed on the horizontal plane parts 22, 22, the tread board 10 is inserted between the horizontal plane parts 22, 22 and the horizontal pieces 24, 24. Since the tread board 10 inserted in this way is sandwiched between the horizontal plane portions 22 and 22 and the horizontal pieces 24 and 24, it is difficult for the tread plate 10 to be rattled up and down during mounting.
Moreover, the horizontal piece 24 blinds between the vertical surface parts 21 and 21 and the opposing end part 10c of the tread board 10 from the upper side.

  Then, the worker covers the space between the vertical surface portions 21 and 21 and the opposed end portion 10 c of the tread board 10 using the covering members 32 and 32. At this time, the worker covers one covering member 32 from the front to the opposite end portion 10c and covers the other covering member 32 from the rear to the opposite end portion 10c.

  Specifically, the operator changes the covering member 321 to the front end surface (or rear end surface) and the opposite end portion of the vertical surface portions 21 and 21 in a state where the engaging portions 322 and 322 are separated by deforming the covering member. The front end surface (or the rear end surface) of 10c is covered, and one locking portion 313 is locked to the outer surface of the horizontal surface portion 22, and the other locking portion 313 is locked to the outer surface of the horizontal piece 24. Thereafter, when the covering member 32 returns to its original shape due to elasticity, the covering portion 321 blinds the space between the vertical surface portions 21 and 21 and the opposed end portion 10c of the tread board 10 from the front side (or the back side).

The fixture 201 may be configured to include the covering member 31 instead of the covering members 32 and 32. At this time, the length of the covering member 31 in the left-right direction is desirably equal to or longer than the length of the horizontal piece 24 in the left-right direction to prevent unnecessary exposure of the horizontal piece 24.
In addition, when the possibility that the user sees the staircase structure S1 from the back side is low, the fixture 201 may not include the covering member 32 on the back side.

Next, the fixture 202 will be described with reference to FIG. The fixture 202 has substantially the same configuration as the fixture 201, but includes one covering member 33 instead of the two covering members 32, 32.
The covering member 33 is in the shape of a strip formed in a substantially U-shape and has elasticity. Further, the covering member 33 covers the vertical surface portions 21 and 21 and the facing end portion 10c of the tread board 10 from the front side so as to be sandwiched vertically. However, the covering member 33 is blinded from the upper side and the front side between the vertical surface parts 21 and 21 and the opposed end part 10c of the tread board 10, and is not blinded from the back side. However, since the back side is not easily noticeable, the appearance of the staircase structure S1 is prevented from deteriorating.

Finally, the fixtures 2L and 2R will be described with reference to FIG.
Although the fixture 2L arranged on the left side of the tread board 10 and the fixture 2R arranged on the right side of the tread board 10 are not the same configuration, they are mirror images of each other. The fixture 2L (or fixture 2R) includes the fixture body 20 and one covering member 32.
The fixture main body 20 included in each of the fixtures 2L and 2R integrally includes vertical surface portions 21 and 21, a horizontal surface portion 22, a projecting portion 23, a horizontal piece 24, and a vertical piece 25. Such a fixture main body 20 is also formed by bending a metal flat plate cut into an appropriate shape, but may be formed by a molding process using metal.

  In the vertical piece 25, three sides of the four sides are in contact with the rear end portions of the rear vertical surface portion 21, the horizontal surface portion 22, and the horizontal piece 24, and the vertical surface portions 21, 21, the horizontal surface portion. 22 and the horizontal piece 24 are arranged so as to be orthogonal to each other. When the vertical pieces 25 are integrally provided in at least two of the rear end portions of the rear vertical surface portion 21, the horizontal surface portion 22, and the horizontal piece 24, the vertical pieces 25 are provided on the fixture body 20. Also functions as a reinforcing part.

The attachment of the fixtures 2L and 2R is substantially the same as the attachment of the left and right fixtures 201 and 201. However, after attaching the fixture main bodies 20, 20 to the side plates 11, 12, when the operator inserts the tread 10 between the horizontal plane portions 22, 22 and the horizontal pieces 24, 24, the rear end surface of the tread 10 Is pushed into the vertical pieces 25, 25 until the tread plate 10 is pushed. Therefore, it is easier to position the tread board 10 in the front-rear direction.
Moreover, the vertical piece 25 blinds between the vertical surface parts 21 and 21 and the opposing edge part 10c of the tread board 10 from the back side.

Then, the worker uses the covering member 32 to cover the space between the vertical surface portions 21 and 21 and the facing end portion 10 c of the tread board 10. At this time, the operator covers the covering member 32 from the front to the opposite end portion 10c. As a result, the covering member 32 blinds the space between the vertical surface portions 21 and 21 and the facing end portion 10c of the tread board 10 from the front side.
Each of the fixtures 2L and 2R may include a covering member 31 or a covering member 33 instead of the covering member 32.

Embodiment 2. FIG.
9, FIG. 10, FIG. 11, FIG. 12, and FIG. 13 show configurations of the fixture 61, the fixture 62, the fixture 63, the fixture 64, and the fixture 65 according to Embodiment 2 of the present invention. It is a perspective view.
Each of the fixtures 61 to 65 includes the fixture body 20 that is substantially the same as the fixture body 20 according to the fixture 201 or the fixture 202 of the first embodiment, but the shape of the protruding portion 23 is different. In this case, the insertion holes 51 of the side plates 11 and 12 may have the same shape as the insertion holes 51 of the first embodiment.

Further, each of the fixtures 61 to 65 includes one covering member 31 according to the first embodiment, one or two covering members 32, or one covering member 33 (not shown).
The fixtures 61 to 65 arranged on the left side of the tread board 10 and the fixtures 61 to 65 arranged on the right side of the tread board 10 have the same configuration.
Each fixture main body 20 may include the vertical piece 25 of the first embodiment. In this case, the fixture main body 20 to be arranged on the left side and the fixture main body 20 to be arranged on the right side are not in the same configuration, but have a mirror image relationship with each other.
Other parts corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

First, the fixtures 61 and 62 will be described with reference to FIGS. 9 and 10. Each of the fixture main bodies 20 of the fixtures 61 and 62 is formed by bending a metal flat plate cut into an appropriate shape, but may be formed by molding using metal.
The protrusion 23 according to the fixture 61 shown in FIG. 9 includes a lower tongue piece 231 similar to the protrusion 23 of the first embodiment, and the base piece of the horizontal piece 24 to above the lower tongue piece 231. An upper tongue piece 232 projecting parallel to the lower tongue piece 231.

That is, the protrusion 23 according to the fixture 61 has two horizontal lines parallel to each other when viewed from the side.
Here, as can be seen with reference to FIG. 6, the base end portion of the horizontal piece 24 corresponds to the outer surface of one side surface portion in the embodiment of the present invention. For this reason, the upper tongue piece 232 functions as a protrusion provided integrally on the outer surface of the one side surface in the embodiment of the present invention.

  On the other hand, the protrusion 23 according to the fixture 62 shown in FIG. 10 has a first tongue piece 233 and a second tongue piece 234. The first tongue piece 233 has a rectangular shape, and in the case of the fixture main body 20 arranged on the left side (or right side), the rear end portion of the front vertical surface portion 21 (or the rear vertical surface portion 21). From the front end portion) is longer than the thickness of the angle and protrudes perpendicularly to both the vertical surface portion 21 and the horizontal surface portion 22 to the outside of the angle. The second tongue piece 234 has substantially the same configuration as the first tongue piece 233, and in the case of the fixture main body 20 arranged on the left side (or right side), the front end portion of the vertical surface portion 21 on the rear side. It projects in parallel to the first tongue piece 233 from the (or the rear end portion of the vertical surface portion 21 on the front side) to the side facing the first tongue piece 233.

That is, the protrusion 23 related to the fixture 62 has two vertical lines parallel to each other when viewed from the side.
When the protrusion 23 according to the fixing tool 61 (or the fixing tool 62) is inserted into the insertion hole 51, it contacts the upper inner surface and the lower inner surface (or the front inner surface and the rear inner surface) of the insertion hole 51, respectively. Therefore, there is an advantage that it is difficult to play.

Next, the fixtures 63 to 65 will be described with reference to FIGS. The fixture main body 20 of each of the fixtures 63 to 65 is formed by molding using metal.
11 has a first tongue piece portion 235 substantially the same as the lower tongue piece portion 231 shown in FIG. 9, and first and second tongue piece portions 233 shown in FIG. , 234 and second tongue piece portions 236, 237 that are substantially the same. However, the 1st tongue piece part 235 and the 2nd tongue piece part 236,237 are provided integrally.
That is, the protrusion 23 related to the fixture 63 has a U-shape that is rolled up so as to open upward in a side view.
In addition, the 1st tongue piece part 235 and the 2nd tongue piece part 236,237 may be provided in the different body.

12 includes a first tongue piece portion 238 substantially the same as the upper tongue piece portion 232 shown in FIG. 9, and first and second tongue piece portions 233 shown in FIG. 234 and second tongue piece portions 236 and 237 which are substantially the same. However, the 1st tongue piece part 238 and the 2nd tongue piece part 236,237 are provided integrally.
That is, the projecting portion 23 related to the fixture 64 has a U-shape that is rolled over so as to open downward when viewed from the side.
In addition, the 1st tongue piece part 238 and the 2nd tongue piece part 236,237 may be provided in the different body.

13 includes first tongue pieces 235 and 238 substantially the same as the lower tongue piece 231 and the upper tongue piece 232 shown in FIG. 9 and the first tongue shown in FIG. And second tongue piece portions 233 and 234 and second tongue piece portions 236 and 237 that are substantially the same. However, the first tongue piece portions 235 and 238 and the second tongue piece portions 236 and 237 are integrally provided.
That is, the protrusion 23 according to the fixture 65 has a square shape in side view.
In addition, the 1st tongue piece part 235,238 and the 2nd tongue piece part 236,237 may be provided separately.

  When the protrusions 23 according to each of the fixing tool 63 to the fixing tool 65 are inserted into the insertion hole 51, at least three of the upper inner surface, the lower inner surface, the front inner surface, and the rear inner surface of the insertion hole 51. Since it contacts each, it has the advantage that it is hard to rattle.

Moreover, since the protrusion part 23 which concerns on each such fixing tool 63-fixing tool 65 mutually reinforces the 1st tongue piece part and 2nd tongue piece part which are distribute | arranged mutually perpendicularly, protrusion of Embodiment 1 is carried out. Strength is improved rather than the protrusion part 23 which concerns on the part 23 and the fixing tools 61 and 62, respectively. Therefore, the protrusion 23 according to each of the fixtures 63 to 65 contributes to improvement of the strength of the fixture body 20.
Each of the fixtures 61 to 65 as described above can constitute the staircase structure S1 in the same manner as the fixtures 2, 201, 202, 2L, and 2R of the first embodiment.

Embodiment 3. FIG.
14 and 15 are a perspective view and a longitudinal sectional view showing the configuration of the staircase structure S2 according to Embodiment 3 of the present invention. However, FIG. 15 shows a cross-sectional view taken along line XV-XV in FIG.
FIG. 16 is a perspective view showing a configuration of fixtures 4L and 4R according to Embodiment 3 of the present invention.
FIG. 17 is an explanatory diagram of a method for assembling the staircase structure S2 according to the third embodiment of the present invention. However, FIG. 17 illustrates the attachment of the fixture 4L to the girder 13.

The staircase structure S2 is, for example, an exposed straight staircase that is installed indoors in a two-story building, similar to the staircase structure S1 of the first embodiment. Moreover, this building has the frame B which supports the floor surface of the 2nd floor (refer FIG. 15). Other parts corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
The staircase structure S2 includes two left and right girders 13, 14, N treads 10, 10,..., N fixtures 4L, 4L,. .., And these are arranged symmetrically.
Each tread board 10 is fixed to the girder plates 13 and 14 in a stepped manner in a lateral posture.

The girder 13 is disposed on the left side, and the girder 14 is disposed on the right side so as to be separated from each other by an appropriate length. Since the configuration of the girder plate 14 corresponds to the configuration of the mirror image of the girder plate 13, the girder plate 13 will be mainly described below.
The girder plate 13 is a plate material made of wood or wood material, and has a shape like a trapezoidal shape by cutting both longitudinal ends of a rectangle having a large aspect ratio. Further, the plate thickness of the girder 13 is thicker than the depths of the first and second fitting grooves 53 and 54.
Of the two short sides of the girder 13, one end surface is disposed along the floor surface F, and the other end surface is disposed along the frame B, for example.

Of the two long sides of the girder 13, the longer one is arranged upward and the shorter one is arranged downward. Hereinafter, the long side portion arranged upward is referred to as an upper side portion.
The angle formed between the short side portion arranged on the lower side of the girder 13 and the upper side portion is equal to the inclination angle of the staircase structure S2.
One surface of the girder 13 is used as a screw surface 13a. For this purpose, each of the N first fitting grooves 53, 53,... Arranged in a staircase pattern at the position corresponding to the fixed position of the N treads 10, 10,. Second fitting grooves 54, 54,... Are formed.

The first fitting grooves 53, 53,... Have the same lateral groove shape, and in each first fitting groove 53, the inner upper surface and the inner lower surface are horizontal surfaces.
On the other hand, the second fitting grooves 54, 54,... Have the same vertical groove shape, and the inner front surface and the inner rear surface of each second fitting groove 54 are vertical surfaces.
Each of the first and second fitting grooves 53 and 54 is opened only in the screw surface 13a, and is not opened in the other surface of the beam plate 13 (for example, the end surface of the upper side portion of the beam plate 13).

The inner method of the first and second fitting grooves 53 and 54 is substantially equal to the dimensions of the first and second projecting pieces 43 and 44 (see FIG. 16) of the fixture 4L. Specifically, the depth of the first fitting groove 53, the inner method in the front-rear direction, and the inner method in the vertical direction (that is, the width of the groove) are the amount of protrusion of the first protruding piece 43 of the fixture 4L, It is slightly longer (for example, about 1 mm) than the depth and thickness. Further, the depth of the second fitting groove 54, the inner method in the front-rear direction (that is, the width of the groove), and the inner method in the vertical direction are the protrusion amount, thickness, and thickness of the first protrusion piece 43 of the fixture 4L. Slightly longer than depth.
Furthermore, the positional relationship between the first and second fitting grooves 53 and 54 corresponds to the positional relationship between the first and second protruding pieces 43 and 44 of the fixture 4L.

The first fitting grooves 53, 53,... And the second fitting grooves 54, 54,... Are formed with high accuracy using, for example, an NC router in a factory that produces plate materials. Can be formed. Further, the back surface of the screw surface 13a is not required to be processed, and each of the first and second fitting grooves 53 and 54 is straight and has a small opening area. For example, a trapezoidal shape, a parallelogram shape, Or it can form easily in a short time rather than the case where a recessed part with wide opening areas, such as triangular shape, is formed.
The girder 13 as described above is inclined in the longitudinal direction between the first floor and the second floor of the building, and the screw surface 13a is obliquely installed in a vertical posture.

Similarly, the girder plate 14 has screw surfaces 14a in which N first fitting grooves 53, 53,... And second fitting grooves 54, 54,. Between the first floor and the second floor, the longitudinal direction is inclined, and the screw surface 14a is obliquely installed in a vertical posture. The inner method of the first and second fitting grooves 53 and 54 relating to the girder 14 is substantially equal to the dimensions of the first and second projecting pieces 43 and 44 of the fixture 4R, and the first The positional relationship between the second fitting grooves 53 and 54 corresponds to the positional relationship between the first and second protruding pieces 43 and 44 of the fixture 4R.
The screw surfaces 13a and 14a of the girder plates 13 and 14 are arranged vertically and in parallel to face each other. That is, the screw surfaces 13a and 14a of the staircase structure S2 are inward.
In addition, the girders 13 and 14 are not limited to the structure which uses wood or a wooden material.

Next, the fixtures 4L and 4R will be described. The shapes of the fixtures 4L and 4R are not the same, but they are mirror images of each other. For this reason, below, the fixing tool 4L is mainly demonstrated.
The fixture 4L has an L-shaped angle shape with a thickness of about 5 mm, and integrally includes a vertical surface portion 41, a horizontal surface portion 42, and first and second projecting pieces 43 and 44. The fixture 4L is formed by bending a metal flat plate cut into an appropriate shape, but may be formed by molding using metal.
The vertical surface portion 41 functions as one side surface portion of the angle and is arranged vertically. The horizontal surface portion 42 functions as the other side surface portion of the angle and is disposed horizontally.

  The horizontal plane part 42 has a rectangular shape, and one long side of the rectangle corresponds to the base end part of the horizontal plane part 42. Further, the horizontal plane portion 42 has one (four total) screw holes formed at four rectangular corners. Such a horizontal surface portion 42 is screwed to the tread plate 10 using screws V, V,... With the outer surface 42 a of the horizontal surface portion 42 and the lower surface 10 b of the tread plate 10 facing each other.

  On the other hand, the vertical surface portion 41 has a trapezoidal shape, and more specifically, a trapezoidal longer upper bottom portion corresponds to the base end portion of the vertical surface portion 41 and a shorter lower bottom portion corresponds to the distal end portion. It is trapezoidal. Further, in the vicinity of the front end portion of the vertical surface portion 41, three screw holes are formed along the right-angled portion of the right-angle trapezoid at a position corresponding to the apex of the right-angle triangle. Such a vertical surface portion 41 is screwed to the beam plate 14 using screws V, V,... With the outer surface of the vertical surface portion 41 and the screw surface 14a of the beam plate 14 facing each other.

Furthermore, a rectangular first protruding piece 43 is integrally provided at the front end portion of the vertical surface portion 41, and the outer surface of the vertical surface portion 41 (more specifically, the rear end portion of the vertical surface portion 41). The rectangular second projecting piece 44 is integrally projected. Each of the first and second projecting pieces 43 and 44 is longer than the thickness of the fixture 4L and shorter than the length of the short side portion of the horizontal surface portion 42, to the outside of the angle (outside of the L shape), the vertical surface portion 41. Projecting vertically.
In the first and second projecting pieces 43 and 44, one long side portion of the rectangle corresponds to a base end portion of the first and second projecting pieces 43 and 44. Moreover, the thickness of the 1st and 2nd protrusion pieces 43 and 44 is equal to the thickness of the vertical surface part 41, and the protrusion amount from the vertical surface part 41 of the 1st and 2nd protrusion pieces 43 and 44 is mutually substantially equal, About 15 mm.

Such first projecting pieces 43 are arranged in a direction along the horizontal plane part 42 (specifically in parallel), and the second projecting pieces 44 are arranged in a direction intersecting the horizontal plane part 42 (specifically, Is arranged vertically).
In addition, the reinforcement board part which connects the vertical surface part 41 and the horizontal surface part 42, and reinforces the fixing tool 4L may be provided inside the angle of the fixing tool 4L.

Next, a method for assembling the staircase structure S2 will be described.
An operator who assembles the staircase structure S2 prepares the girder plates 13 and 14, the N tread plates 10, 10,..., The N fixtures 4L, 4R, and the plurality of screws V, V,. These are produced in advance at the factory and are carried into the staircase installation location.

  The operator first faces the screw surfaces 13a, 14 of the girders 13, 14 so as to be parallel to each other, and further, the end surfaces of the two short sides of the girders 13 (or the girders 14) are placed on the floor. The upper portions of the girders 13 and 14 are screwed to the housing B in a state of being in close contact with the surface F and the housing B. As a result, each girder 13 and 14 is obliquely installed between the first and second floors of the building so that the screw surfaces 13a and 14a are in a vertical posture. At this time, the inclination angle in the longitudinal direction of each of the girders 13 and 14 with respect to the floor surface F is equal to the inclination angle of the staircase structure S2. Further, the inner and lower surfaces of the first fitting grooves 53 and 53 (or the inner and lower ends of the second fitting grooves 54 and 54) opposed to each other have the same height from the floor surface F.

Next, the operator places the fixture 4L so that the outer surface 42a of the horizontal surface portion 42 faces upward. Then, the operator inserts the first and second projecting pieces 43 and 44 of the fixture 4L into the first and second fitting grooves 53 and 54 of the beam plate 13 from the distal end portion to the proximal end portion. At this time, the lower surface of the first projecting piece 43 is naturally placed on the inner and lower surfaces of the first fitting groove 53, and the lower end of the second projecting piece 44 is naturally placed on the inner and lower end of the first fitting groove 54. Is placed.
In this state, the operator screws the vertical surface portion 41 to the beam plate 13.

At this time, the first and second protruding pieces 43 and 44 are such that the first protruding piece 43 contacts the inner surface of the first fitting groove 53 and the second protruding piece 44 is the second fitting groove 54. Since it contacts the inner surface, it is difficult to rattle in either the vertical direction or the front-rear direction. Therefore, workability is improved when the fixture 4L is attached.
The operator repeats the fixing work of the fixing tool 4L N times.

Similarly to the case where the fixture 4L is attached to the girder 14, the fixture 4R is arranged so that the outer surface 42a of the horizontal surface portion 42 faces upward. Then, the operator fits the first and second protruding pieces 43 and 44 of the fixture 4R into the first and second fitting grooves 53 and 54 of the girder plate 14 from the distal end portion to the proximal end portion. . In this state, the operator screws the vertical surface portion 41 to the beam plate 14.
The operator repeats the attaching operation of the fixing tool 4R N times.
As a result, the horizontal surfaces 42 and 42 of the fixtures 4L and 4R are arranged at the same height from the floor surface F and parallel to the floor surface F.

Next, the operator places the tread plate 10 on the horizontal plane portions 42 and 42 such that the horizontal plane portion 42 of the fixture 4L and the horizontal plane portion 42 of the fixture 4R face each other and the lower surface 10b of the tread plate 10.
In this state, the operator screws the horizontal surface portions 42 and 42 to the tread plate 10.
The operator repeats the mounting operation of the tread plate 10 N times.
In addition, when attaching the step board 10 nearest to the floor surface F to the girder plates 13 and 14, the operator screws the horizontal plane portions 42 and 42 of the fixing tool 4L and the fixing tool 4R to the lower surface 10b of the step board 10. Therefore, the vertical surfaces 41 and 41 of the fixture 4L and the fixture 4R may be screwed to the screw surfaces 13a and 14a of the girders 13 and 14.

By the way, there is a high possibility that the separation distance between the screw surfaces 13a and 14a may vary due to warpage of the spar plates 13 and 14 or distortion of the installation location. Even in this case, the tread plate 10 is fixed to the girders 13 and 14 without any problem. This is because the tread plate 10 is formed with a notch or a hole or the like that strictly defines the left-right arrangement of the tread plate 10 by engaging with the girders 13, 14 or the horizontal plane portions 42, 42, etc. Because it is not done.
In addition, since the fixtures 4L and 4R and the both ends of the tread plate 10 are not opposed to each other, an unsightly gap is not generated between the fixtures 4L and 4R and the both ends of the tread plate 10. Therefore, a member for hiding the void is unnecessary.

The staircase structure S2 as described above can be installed inexpensively in a short time because the assembly method is simple.
Moreover, like a conventional staircase structure, it has a higher decorativeness and a sense of openness than a box staircase. Further, unlike the conventional fitting type staircase structure in which a tread having a notch is fitted and fixed to a girder having a tread supporting part, each tread 10 is connected to a girder 13 using a pair of left and right fixing tools 4L and 4R. , 14 does not cause various problems related to the fitting type staircase structure (the notch portion reduces the strength of the tread board, the number of processing steps of the girder plate, etc.).

  Furthermore, in the fitting type staircase structure, since it is necessary to form a tread board support portion on the girder, a girder having a thickness in the range of 60 mm to 75 mm, for example, is used. However, in the case of the staircase structure S2, the girder plates 13 and 14 thinner than the fitting type staircase structure may be used.

Furthermore, the load applied to the tread board 10 and transmitted to the fixtures 4L, 4R is the first fitting with screws V, V,... That fasten the vertical surface portions 41, 41 to the screw surfaces 13a, 14a. Of the inner and lower surfaces of the joint grooves 53 and 53, the first projecting pieces 43 and 43 are supported by the portion where the lower surfaces are in contact. Since this portion has a large area, the load can be stably supported.
Further, since the formation positions of the first and second fitting grooves 53 and 54 in the girder plates 13 and 14 are accurate, the first and second projecting pieces 43 and 44 of the fixtures 4L and 4R are respectively connected to the girder. By inserting into the first and second fitting grooves 53 and 54 of the plates 13 and 14, respectively, the tread plate 10 placed on the fixtures 4L and 4R is also arranged at an accurate position. That is, the first and second protruding pieces 43 and 44 and the first and second fitting grooves 53 and 54 are also used for positioning the tread plate 10.

Further, in the case of the staircase structure S2, since the fixtures 4L and 4R are arranged inside the girders 13 and 14, there is an advantage that the fixtures 4L and 4R are not conspicuous and the aesthetic appearance is improved. In addition, since the first and second fitting grooves 53 and 54 are not open except for the screw surfaces 13a and 14a, the first and second fitting grooves 53 and 54 are made inconspicuous and the aesthetic appearance is improved. be able to.
Furthermore, since the fixtures 4L and 4R support the vicinity of the center portion of the tread board 10 and the distance between the fixtures 4L and 4R is short, the advantage that the deflection of the center portion of the tread plate 10 when a load is applied to the tread plate is small. There is also.

Furthermore, even if there is a building wall adjacent to the right side or left side of the place where the staircase structure S2 is installed, it is necessary to place a screwing tool between the wall surface and the screw surfaces 13a, 14a. Therefore, there is an advantage that there is no problem in the work of screwing the fixing tools 4L and 4R.
In addition, the structure which fixes each fixing tool 4L, 4R and the tread board 10 in the state (namely, state which screw surface 13a, 14a is distribute | arranged outward) in which the girder plates 13 and 14 are arrange | positioned right and left reversely may be sufficient. In this case, since the fixtures 4L and 4R are arranged outside the girders 13 and 14, there is no need to arrange a screwing tool between the girders 13 and 14. Therefore, there is an advantage that there is no problem in the work of screwing the fixing tools 4L and 4R.

  Furthermore, the staircase structure S <b> 2 may include a single girder plate that is thicker than the girder plate 13 instead of the girder plates 13 and 14. In this case, both surfaces of one girder plate are used as screw surfaces corresponding to the screw surfaces 13a and 14a.

  The staircase structure S <b> 2 is not limited to a configuration including one girder plate 13 and 14. For example, the staircase structure S2 may have a configuration in which one is the girder 13 or the girder 14 and the other is a housing such as a wall or a pillar. In this case, the tread boards 10, 10,... Are fixed at one end side to the girders 13 or 14 by the fixtures 4L or 4R, and the other end sides in accordance with a conventional construction method (for example, notches provided in the frame). (The other end side is mounted on the housing).

  The staircase structure S2 is not limited to the exposed straight staircase. For example, the staircase structure S2 may be a box staircase or a platform staircase part of which is an exposed staircase and the remaining part has a conventional configuration. Alternatively, the staircase structure S2 may constitute a folded staircase or a bent staircase having a landing in the middle, or a rotating staircase. However, the tread boards 10, 10,... Constituting the turning stairs have a triangular shape in plan view. In this case, one side of the tread boards 10, 10,... Is fixed to the girder 13 or the girder 14 constituting the surrounding staircase, and the top is fixed to, for example, a frame.

Embodiment 4 FIG.
FIG. 18 is a perspective view showing the configuration of the staircase structure S3 according to Embodiment 4 of the present invention.
The staircase structure S3 includes one side plate 11 and a girder plate 14, and N pieces of tread plates 10, 10,. FIG. 18 shows a state in which the two treads 10 and 10 are fixed in a stepwise manner in the lateral posture between the side plate 11 and the girder plate 14.
In the case of a combination of one side plate and the other side plate, an L-shaped fixture is attached to the side plate side, and an inverted L-shaped fixture is attached to the side plate side.

For this reason, the staircase structure S3 further includes, for example, each of N fixtures 2 and fixtures 4R. In this case, each tread board 10 has a left end portion fixed to the side plate 11 by the fixture 2 and a right end portion fixed to the girder plate 14 by the fixture 4R.
In addition, the same code | symbol is attached | subjected to the part corresponding to Embodiment 1-3, and those description is abbreviate | omitted.

The staircase structure S3 as described above has the same effects as the staircase structures S1 and S2 of the first to third embodiments.
The staircase structure S3 may include a single side plate 12 and a girder plate 13, N treads 10, 10,..., And N fixing devices 2 and 4L. In this case, each tread board 10 is fixed to the side plate 12 by the fixture 2 at the right end and to the girder 13 at the left end by the fixture 4L.

Embodiment 5 FIG.
FIG. 19 is a perspective view showing a configuration of a fixture 66 according to Embodiment 5 of the present invention.
The fixture 66 includes a fixture body 20 similar to the fixture body 20 shown in FIG. 9, and further includes covering members 32, 32 similar to the covering members 32, 32 shown in FIG.
The fixture 66 arranged on the left side of the tread board 10 and the fixture 66 arranged on the right side of the tread board 10 have the same configuration.
In addition, the same code | symbol is attached | subjected to the part corresponding to Embodiment 1-4, and those description is abbreviate | omitted.

The fixture main body 20 of the present embodiment integrally includes vertical surface portions 21, 21, 210, a horizontal surface portion 22, a protruding portion 23, a horizontal piece 24, and locked projections 26, 26. Such a fixture body 20 is formed by bending a metal flat plate cut into an appropriate shape, but may be formed by molding using metal.
Each fixture main body 20 may include a vertical piece 25 shown in FIG. In this case, the fixture main body 20 to be arranged on the left side and the fixture main body 20 to be arranged on the right side are not in the same configuration, but have a mirror image relationship with each other.

  The vertical surface portion 210 functions as one side surface portion of the angle together with the vertical surface portions 21 and 21. The vertical surface portion 210 is constructed between the vertical surface portions 21 and 21 so as to connect the rear end upper portion of the front vertical surface portion 21 and the front end upper portion of the rear vertical surface portion 21. For this reason, the whole vertical surface part 21,21,210 has comprised one rectangular plate shape in which the rectangular through-hole was formed in the front-back direction center part. Moreover, the protrusion part 23 is protrudingly provided by the peripheral part of this through-hole.

  The protrusion 23 has a lower tongue piece 231 similar to the lower tongue piece 231 shown in FIG. 9 and an upper tongue piece 239 similar to the upper tongue piece 232 shown in FIG. That is, the protrusion 23 according to the fixture 66 is formed in two horizontal lines parallel to each other in a side view.

  However, the upper tongue piece 239 protrudes in parallel with the lower tongue piece 231 from the lower end of the vertical surface portion 210 to above the lower tongue piece 231. For this reason, the separation distance between the lower tongue piece 231 and the upper tongue piece 239 is shorter than the separation distance between the lower tongue piece 231 and the upper tongue piece 232 shown in FIG. Therefore, the vertical dimension of each of the insertion holes 51 and 51 formed in the side plates 11 and 12 needs to be shorter than the vertical dimension of the insertion hole 51 in the first, second, and fourth embodiments.

  One locked protrusion 26 protrudes forward from the front end portion of the front vertical surface portion 21, and the other locked protrusion 26 protrudes rearward from the rear end portion of the rear vertical surface portion 21. Each latching protrusion 26 is formed in a plate shape along the vertical surface portions 21 and 21, and claws of latching portions 323 and 323, which will be described later, are provided on an upper portion and a lower portion of the base end portion of each latching projection 26, respectively. A vertical recess is formed so that the portions can be easily engaged.

Each covering member 32 integrally includes a covering portion 321 having a shorter vertical dimension than the covering portion 321 shown in FIG. 6 and locking portions 323 and 323 similar to the locking portions 322 and 322 shown in FIG. 6. . The locking portions 322 and 322 shown in FIG. 6 are to be locked to the outer surface of the horizontal piece 24 and the outer surface of the horizontal surface portion 22, but the locking portions 323 and 323 in the present embodiment are locked protrusions 26. To be locked. For this purpose, a claw portion that engages with the base end portion of the locked protrusion 26 protrudes from the distal end portion of each of the locking portions 323 and 323 in a direction facing each other.
When the covering member 32 is attached to the locked protrusion 26, the outer surface of the upper (or lower) locking portion 323 is flush with the outer surface of the horizontal piece 24 (or the horizontal surface portion 22).

  The fixture 66 as described above constitutes the staircase structure S1 and S3 in the same manner as the fixtures 2, 201, 202, 2L, and 2R of the first embodiment and the fixtures 61 to 65 of the second embodiment. Can do.

The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is not intended to include the above-described meanings, but is intended to include meanings equivalent to the claims and all modifications within the scope of the claims.
In addition, as long as the effects of the present invention are obtained, the staircase structures S1 to S3 or the fixtures 2, 4L, and 4R may include components that are not disclosed in the first to fifth embodiments.

10 Tread (one object)
11, 12 Side plate (plate member, other object)
13,14 Girder (other objects)
51 Insertion hole 2, 201, 202, 2L, 2R, 4L, 4R, 61-66 Fixing tool 21, 41 Vertical surface portion (one side surface portion)
22, 42 Horizontal plane (other side)
23 Protruding portion 235 First tongue piece portion 233, 234 Second tongue piece portion 31, 32, 33 Cover member 43, 44 First and second protruding pieces 53, 54 First and second fitting grooves S1, S2 , S3 Staircase structure W Wall (building)

Claims (4)

Between the upper stage and the lower stage of a building having an upper stage and a lower stage, one or two girders in which the longitudinal direction is inclined and one surface is obliquely arranged in a vertical posture;
A plurality of treads fixed in a staircase in a lateral position and in a non-contact manner with the treads on the girders,
Each step board is fixed to the girders, one side portion is screw fastened to the one surface, at step structure other side portion and a angle-shaped fixture that is screwing the lower surface of the step board There ,
The fixture is
The other side surface portion is screwed to the lower surface with the outer surface of the other side surface portion and the lower surface facing each other.
A first projecting piece projecting outward of the angle longer than the thickness of the angle is integrally provided at the tip of the one side surface;
A second projecting piece projecting outward of the angle longer than the thickness is provided integrally on the outer surface of the one side surface portion other than the tip portion;
The girder is
First and second fitting grooves having a width corresponding to the thickness of the first and second projecting pieces and into which the first and second projecting pieces are fitted are formed on the one surface. A staircase structure characterized by The first projecting piece is disposed in a direction along the other side surface portion,
The second projecting piece is arranged in a direction intersecting the other side surface portion,
The staircase structure according to claim 1, wherein the first and second fitting grooves are opened only on the one surface. In order to fix the tread board to be provided in the staircase structure to the girder board to be provided in the staircase structure ,
One side surface of the angle screwed to the girder plate ,
And a other side of the angle to be screw fastened to said tread plate with its outer surface is facing said tread plate,
A first projecting piece that protrudes to the outside of the angle longer than the thickness of the angle is integrally provided at the tip of the one side surface;
A fixture, wherein a second projecting piece that is longer than the thickness and projects to the outside of the angle is integrally provided on an outer surface of the one side surface other than the tip. Between the upper stage and the lower stage of a building having an upper stage and a lower stage, one or two girders in which the longitudinal direction is inclined and one surface is obliquely arranged in a vertical posture;
A plurality of treads fixed in a staircase in a lateral position and in a non-contact manner with the treads on the girders,
Each step board is fixed to the girder, and one side portion is screwed to the one surface, and the other side portion is screwed to the lower surface of the tread plate, and an angle-shaped fixing tool. We met assembly method,
As the fixture, a first projecting piece that protrudes to the outside of the angle longer than the thickness of the angle is integrally provided at the tip of the one side surface portion, and is longer than the thickness of the angle. Preparing a fixture in which a second protruding piece protruding outward is integrally provided on an outer surface of the one side surface other than the tip;
The girder plate has a width corresponding to the thickness of the first and second projecting pieces, and the first and second fitting grooves into which the first and second projecting pieces are fitted, Prepare one or two girders formed on one side,
The girder plate is inclined between the upper stage and the lower stage so that the longitudinal direction is inclined and the one surface is in a vertical posture,
The first and second projecting pieces are inserted into the first and second fitting grooves,
The one side part is screwed to the one side,
The outer surface of the other side surface portion and the lower surface face each other, and the tread is placed on the other side surface portion,
A method for assembling a staircase structure, wherein the other side surface portion is screwed to the lower surface.

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