JP2018111966A - Sound proof stairs and its construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the sound proof performance and the construction stability by enhancing the stiffness at the high stair part, as well as making the noise or vibration hardly transmitted to the adjacent dwelling rooms through the boundary wall W around the staircase R when using the stairs S provided in the staircase R in the building, and being capable of obtaining enough sound insulation performance.SOLUTION: The stairs S have left and right base units 1. The base unit 1 has a framework structure in which a plurality of frame bodies 2 are connected, and is fixed on the floor surface F of the staircase R at the lower end part while leaving a gap with the boundary wall W, and is self-standing. In the base unit 1, a tread plate mounting portion 6 and a riser plate mounting portion 7 are formed stepwise. In the base unit 1, a tread plate 21 is bridged between the tread plate mounting portions 6 of the same height, and a riser plate 22 is bridged between the riser plate mounting portions 7 of the same hight respectively. In a spiral stairway part S2 and an upper straight stairway part S3, the left and right base units 1 are connected to each other by reinforcing units 15 to 17, and a structural face member 12 is attached to be fixed to the base unit 1 so as to straddle a plurality of frame bodies 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a soundproof staircase and a construction method thereof.

  2. Description of the Related Art In recent years, as a small two-story rental apartment building, for example, a type in which entrances of second-floor dwelling units are alternately arranged on the first floor with entrances of first-floor dwelling units is known. In this type of apartment, the second-floor occupant enters and exits the second-floor room from the entrance on the first floor through a dedicated staircase in the building.

  By the way, this staircase is constructed in the staircase, and adjacent to the first floor dwelling unit where the entrance is adjacent, with a boundary wall that separates each dwelling unit in the apartment house, so when using the staircase, Noise and vibration for the dwelling units on the first floor become a problem.

  In other words, the internal staircases that are constructed in rental apartments have the problem that noise and vibration at the time of their rise and fall are transmitted to other rooms. Compared to the single-family house used, there is a possibility that problems may arise among tenant households due to noise and vibration when using the inner stairs.

  In order to solve such a problem, conventionally, as shown in Patent Document 1, for example, left and right sasara girders, in which a plurality of frames are connected to the floor surface of a staircase and have an inclined portion at the top, Standing up the receiving panel, mounting and fixing a sasara girder whose upper surface is formed in a staircase shape on the sloped part of this sasara girder receiving panel, and spanning the tread board and the kick board between the upper surfaces of the left and right sasara girders A staircase structure has been proposed in which the staircase is constructed with a clearance from the wall of the staircase.

JP 2001-303735 A

  In this patent document 1, the sasara girder and the sasara girder receiving panel that receive the treads are fixedly supported on the floor surface, and the stairs are erected on the floor surface with a clearance from the field wall. And the vibration of the staircase and noise transmitted to the wall can be suppressed.

  However, in such a staircase structure, since the staircase is a structure that is supported only on the floor surface, there is a possibility that wobble may occur due to insufficient rigidity of the staircase, particularly in a high step portion located at a high position from the floor surface. It becomes. In that case, it is difficult to stably maintain the original soundproof performance of the stairs, and there is a difficulty that the stability of the construction is insufficient.

  The present invention has been made in view of such a point, and an object of the present invention is to improve the structure of the soundproof staircase so that noise during use of the staircase can be reduced in the adjacent dwelling room through the boundary wall of the staircase room. It is to make it difficult to transmit vibration and to obtain sufficient soundproofing performance, while increasing the rigidity of the high step portion so that soundproofing performance and construction stability can be maintained.

  In order to achieve the above object, according to the present invention, first, the left and right ground units are self-supporting on the floor surface of the staircase, and the step board and the kick board are supported between the ground units, so that the stairs are separated from the wall. The structure is completely separated. Furthermore, in the high step portion of the staircase, the right and left base units are connected to each other via a reinforcing unit, or when each base unit has a structure in which a plurality of frames are connected, the frames are connected to each other by a structural surface material. Connected.

  Specifically, the first invention includes left and right ground units provided on the left and right sides of the staircase as soundproof staircases provided in the staircases in the building. The lower end is fixed to the floor surface of the staircase without being fixed to the boundary wall of the staircase, and is free-standing on the floor surface of the staircase with a gap from the boundary wall. Stepping plate mounting portions that extend in the vertical direction and kick plate mounting portions that extend in the vertical direction are alternately formed in a staircase shape. The kick plates are bridged between the kick plate mounting portions of each, and a gap is formed between the left and right ends of each tread plate and each kick plate and the boundary wall, and a height of a predetermined step or more from the floor surface. A reinforcement unit is interposed between the left and right base units located in the high step, Base unit between the right and left by the strong unit is characterized in that it is integrally connected.

  Moreover, 2nd invention is equipped with the right-and-left base unit provided in the right-and-left both sides of the said staircase as a sound-proof staircase provided in the staircase in a building, and each said base unit is a field wall on either side of a staircase The lower end is fixed to the floor surface of the staircase without being fixed to the floor surface of the staircase and is spaced from the boundary wall, and each base unit has a plurality of different heights. A rectangular frame body has a frame structure in which the planes in the frame body are arranged in series in the order of height so that the plane in the same plane is positioned on the same plane, and are integrally connected. The tread plate mounting portion extending in the direction and the kick plate mounting portion extending in the vertical direction are alternately formed in a staircase shape, and the tread plate is also in the same height between the corresponding tread mounting portions of the left and right base units. Kick plates are bridged between the Kake plate mounting parts. There is a gap between the left and right ends of the plate and each kick plate and the boundary wall. Are integrally attached so as to straddle between the plurality of frames of the high step portion.

  In these first and second inventions, the left and right ground units are provided in the staircase in a self-supporting state with their lower ends fixed to the floor of the staircase, and the ground unit is not fixed to the field wall. There is a gap between the tread plate mounting parts of the left and right base units, and the kick plates are bridged between the kick plate mounting parts, and the left and right ends of each tread plate and each kick plate are connected to the field wall. Since there is a gap between them, the stairs including the left and right base units, the tread board and the kick board are fixedly supported on the floor surface of the staircase and are completely separated from the left and right boundary walls It becomes. Therefore, the staircase including the base unit, the tread board and the kick board can be completely insulated from the field wall, and noise and vibration when using the staircase are transmitted to the living room adjacent to the field wall through the field wall as much as possible. As a result, the soundproofing performance for the room can be secured.

  In addition, since the tread plate mounting portion and the kick plate mounting portion are formed in a staircase shape on the base unit, and the tread plate and the kick plate are respectively attached to these mounting portions, there is no need to separately fix the steps and side plates to the field wall. Therefore, the stairs can be easily constructed.

  In particular, in the first aspect of the invention, the reinforcing unit is interposed between the left and right base units located at the high step portion having a height of a predetermined step portion or more from the floor surface in the staircase, and the left and right base units are connected to each other by the reinforcing unit. Since the stairs are connected together, even if the stairs are supported only on the floor surface, the left and right rigidity of the high steps is ensured and the above soundproof performance of the stairs is maintained stably. It is possible to improve the stability of the construction.

  On the other hand, in the second invention, the base unit of the staircase is integrally connected in such a manner that a plurality of rectangular frames having different heights are arranged in series so that the planes in the frame are positioned on the same plane. A structural face material is attached to each of the left and right base units located at a high step portion that is higher than a predetermined step portion of the staircase so that it straddles between the plurality of frame bodies. Therefore, even if each base unit has a frame structure, the structural unit that straddles and connects between the frames ensures a large rigidity in the front-rear direction of the base unit, and the original soundproofing of the stairs The performance can be maintained stably and the stability of the construction is also improved.

  According to a third invention, in the second invention, a reinforcing unit is interposed between the left and right base units located in the high step portion, and the left and right base units are integrally connected by the reinforcing unit. It is characterized by that.

  In the third aspect of the invention, the effects of the first and second aspects of the invention are synergistically obtained, both the left and right rigidity of the high step portion of the staircase and the front and rear direction rigidity are both ensured, and the soundproofing of the staircase is achieved. The performance can be maintained more stably, and the construction stability is further improved.

  According to a fourth invention, in the second or third invention, the structural face material is attached to an outer surface on the opposite side of the opposing base unit in the frame of the base unit.

  In the fourth aspect of the invention, since the structural surface material is attached to the outer surface of the frame body in the base unit, when the respective frame bodies of the base unit are fixed to the floor surface around the staircase, the operator Just put the frame between the two base units and fix the frame on the inside (center side of the floor) from the structural surface material, as in the case where the structural surface material is attached to the inner surface of the frame Moreover, it is not necessary to enter and fix the frame body between the outer face of the structural face material and the boundary wall, and the construction of the base unit with the structural face material can be easily performed.

  According to a fifth invention, in any one of the first to fourth inventions, a tread board and a kick board adjacent to the upper side of the tread board are connected and integrated to provide a tread unit having an L-shaped cross section, The tread unit is fixed to at least the base unit from the front side of the tread.

  In the fifth invention, the step board and the kick board adjacent to the upper side thereof are connected to each other to form a step board unit having an L-shaped cross section, and the step board unit is fixed to the base unit from the front side by the step board. By simply fixing the tread board unit, the kick board can be installed at the same time as the tread board. In addition, it is not necessary to fix the tread unit from the back side of the tread, and the workability can be improved.

  A sixth invention is characterized in that, in any one of the first to fifth inventions, a surface finishing material having a cushioning property is attached and fixed to the upper surface of the tread.

  In the sixth aspect of the invention, since the surface finishing material fixed to the upper surface of the tread has cushioning properties, it is possible to reduce the walking sound when the pedestrian steps on the tread.

  According to a seventh invention, in any one of the first to sixth inventions, the soundproof staircase is connected to the lower straight staircase portion whose lower end portion is fixed to the floor and the upper end of the lower straight staircase portion. The upper staircase portion connected to the upper end of the surrounding staircase portion, and the high step portion is a step portion higher than the above-mentioned staircase portion.

  In the seventh aspect of the invention, the high step portion of the staircase is a step portion equal to or more than the surrounding staircase portion, that is, the surrounding staircase portion and the upper straight staircase portion, and the rigidity of these step portions can be increased.

  8th invention is the construction method of the soundproof staircase of 1st or 2nd invention, Comprising: The base unit on either side is attached to the floor surface of a staircase, The lower end part is fixed to a floor surface, A step board unit having a L-shaped cross section is formed by connecting and integrating a tread board and a kick board adjacent to the upper side of the tread board so that the tread board unit is grounded from the front side on the tread board. By fixing the tread plate and kick plate to the unit with a gap between the wall of the staircase, the tread plate is bridged between the tread plate mounting portions of the left and right base units, and the kick plate is bridged between the kick plate mounting portions. It is characterized by that.

  In the eighth aspect, the same effect as the first or second aspect can be achieved. Also, a tread board unit having an L-shaped cross section is formed by the tread board and a kick board adjacent to the upper side thereof, and the tread board unit is fixed to the base unit from the front side of the tread board. The board can be installed at the same time, and the work of fixing the tread unit from the back side of the tread board becomes unnecessary, and the workability can be improved.

  As described above, according to the present invention, as a soundproof staircase to be constructed in a staircase in a building, left and right base units are arranged in the staircase with a gap from the boundary wall of the staircase, and the base unit is arranged. Standing and fixing on the floor of the staircase, bridging the tread board and the kick board between the base units, and connecting the left and right base units located at the high steps of the staircase together with the reinforcing unit, or By attaching the structural surface material so as to straddle between the multiple frames in the framework structure of the base unit located at the high step, the stairs are fixedly supported on the floor surface of the staircase This is completely isolated and insulated from the left and right boundary walls, and noise and vibrations when using stairs are transmitted to the living room through the boundary walls as much as possible. Can be secured. In addition, there is no need to separately fix the steps and side plates to the boundary wall, and the stairs can be easily constructed, and the rigidity of the left and right foundation units at the high stairs is ensured, and the stairs are soundproofed. It is possible to maintain stable performance and improve construction stability.

FIG. 1 is a plan view of a soundproof staircase according to an embodiment of the present invention. FIG. 2 is a plan view showing a state in which the tread board and the kick board are removed from the soundproof staircase. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 5 is a cross-sectional view taken along line VV in FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a front view of the lower reinforcing unit. FIG. 8 is a front view of the middle reinforcing unit. FIG. 9 is a front view of the upper reinforcing unit. FIG. 10 is an enlarged perspective view illustrating the tread board unit. FIG. 11 is an enlarged cross-sectional view showing a tread plate to which a nose member and a surface finish are attached. FIG. 12 is a cross-sectional view of the uppermost mounting structure of the stairs. FIG. 13 is a cross-sectional view showing the floor structure of the staircase.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its use at all.

  FIG. 1 shows a soundproof staircase S according to an embodiment of the present invention, and this soundproof staircase S is provided in a staircase room R in a building such as a two-story rental apartment house. Although not shown, the entrances of the second-floor dwelling units in the building are arranged side by side with the entrances of the first-floor dwelling units, and the soundproof staircase S includes a dwelling unit on the second floor and a front door located on the first floor in the staircase R. The boundary walls W, W,... Around the staircase R constitute a wall portion of the living room in the first floor dwelling unit. In addition, the space of the staircase room R is vertically divided by the staircase S, and a storage space (not shown) for a first-floor dwelling unit with the staircase S as a ceiling is formed below the staircase S. .

  The soundproof staircase S has a lower end connected to, for example, six lower straight staircase portions S1 that extend obliquely upward in a straight line from the first floor F of the staircase R, and the upper end of the lower straight staircase portion S1. The lower straight staircase portion S1 is bent 90 ° to the right in plan view and extends obliquely upward, for example, three steps of the staircase portion S2, and the lower end is connected to the upper end of the peripheral staircase portion S2. For example, three upper straight steps S3 extending obliquely upward in a direction extending upward (perpendicular to the lower straight steps S1).

  In the description of the present embodiment, for convenience of explanation, the left side and the right side in the upward direction of the staircase S including the lower straight staircase portion S1, the surrounding staircase portion S2, and the upper straight staircase portion S3 are “left” and “right”, respectively. ”, The front side (lower side) is called“ front ”, and the back side (upper side) is called“ rear ”. Further, the step numbers counted from the bottom in the staircase S are indicated by round numerals in the drawing.

  As shown in FIGS. 2 to 6, in the lower straight staircase portion S <b> 1, the surrounding staircase portion S <b> 2, and the upper straight staircase portion S <b> 3, left and right base units 1 and 1 are provided respectively on the left and right sides of the staircase room R. It has been.

  As shown in FIGS. 3 to 6, each of the left and right base units 1, 1 has a frame structure in which a plurality of rectangular frames 2, 2,. .., And the heights of the plurality of frames 2, 2,... Are basically different from each other. Each frame 2 is made of, for example, 30 mm square material. Between the upper and lower horizontal frame materials 2a, 2a made of this square material, the two vertical frames made of the same square material and having the same height extend in the vertical direction. The materials 2b and 2b are connected and integrated into a rectangular frame shape by screws or the like, and the height of the vertical frame material 2b is different between the frames 2, 2,. The bodies 2, 2,... Are formed. The widths of the frames 2, 2,... In the straight staircase portions S1, S3 (the length in the direction along the base unit 1) are basically the same, and the width of the frame body 2 in the surrounding staircase portion S2 is It is larger than the width of the frame 2 at the straight steps S1, S3.

  In the frame structure of the base unit 1, the frames 2 and 2 adjacent to each other having different heights are vertically aligned with the entire vertical frame member 2 b on the adjacent side in the lower frame 2 on the lower side. Of the horizontal frame members 2a, 2a and the frame body 2 on the higher side, and in the upper frame body 2 on the higher side, a part of the vertical frame member 2b on the adjacent side and the lower side. The side frames 2a on the side are connected in a state where the end surfaces thereof are in contact with the lower frame 2 respectively.

  The base unit 1 on the left side (outside in the direction of the staircase) is bent at the center (eighth stage) of the rotating staircase portion S2, and the lower half of the straight staircase portion S1 and the lower half of the rotating staircase portion S2 (7). In the step and the lower half of the eight steps, as shown in FIG. 3, for example, eight frame bodies 2, 2,... Having different heights are planes in each frame body 2 (planes passing through the frame body 2). ) Are arranged in series in order of height so as to be positioned on the same vertical plane extending along the left boundary wall W and are integrally connected by screws or the like. On the other hand, in the same base unit 1 on the left side, as shown in FIG. 4, the height of the upper half part (the upper half part of the eight steps and the nine steps) and the upper straight step part S3 are different. For example, five frame bodies 2, 2,... Have a plane wall in each frame body 2 (a plane passing through the frame body 2) on the left side wall W (the upper side wall wall W extending in the left-right direction in FIGS. 1 and 2). Are arranged in series in the order of height so as to be positioned on the same vertical plane extending along and are integrally connected by screws or the like.

  In the left base unit 1, the lower half staircase portion S1 and the lower half portion of the surrounding staircase portion S2, the eight frames 2, 2,..., And the upper half portion and the upper straight staircase of the surrounding staircase portion S2. The five frames 2, 2,... Of the portion S3 are screws or the like perpendicular to the right side of the former assembly so that the front end of the latter assembly is in contact with the L shape in plan view. The base unit 1 is formed along the boundary wall W on the left side of the staircase R by connecting the plurality of frames 2, 2,. Of the four frames 2, 2,... Located in the surrounding staircase portion S2 (7 to 9 steps) of the left base unit 1, the two frames 2, 2, located in the center of the surrounding staircase portion S2. That is, both the lower half frame 2 located at the right end in FIG. 3 and the upper half frame 2 located at the left end in FIG. 4 constitute the same step (eight steps from the bottom). These are connected at right angles in plan view.

  On the other hand, in the base unit 1 on the right side (in the direction around the stairs), the portion located in the lower straight staircase portion S1 is a lower straight staircase portion in the left base unit 1 as shown in FIG. The same frame structure as that of the first to sixth steps of S1, and six frames 2, 2,... With different heights extend along the right boundary wall W in the plane in each frame 2. They are arranged in series in the order of height so as to be positioned on the same vertical plane and are integrally connected by screws or the like. The height of each of the six frames 2, 2,... Corresponds to the height of each frame 2 located in the first to sixth steps of the lower straight staircase portion S1 in the base unit 1 on the left side. When the left and right base units 1 and 1 are arranged in a standing state facing the left and right, the heights of the frame bodies 2 and 2 corresponding to the left and right are made to coincide with each other.

  Further, in the same right base unit 1, the right base unit 1 located in the surrounding step S <b> 2 and the upper step S <b> 3 has four frames 2, 2,... Having different heights as shown in FIG. 6. The planes in each frame 2 are serially arranged in order of height so as to be positioned on the same vertical plane extending along the right boundary wall W (the lower boundary wall W extending in the left-right direction in FIGS. 1 and 2). Are connected together by screws or the like. Of these four frames 2, 2,..., The height of the upper three frames 2, 2,... Is in the upper straight staircase portion S3 (10 to 12 steps) in the left base unit 1. .. Corresponding to the heights of the three frames 2, 2,..., And the height of the remaining lowermost frame 2 is located at the lowermost step (seven steps) of the staircase portion S2 in the base unit 1 on the left side. When the right and left base units 1 and 1 are arranged in an upright state facing each other, the heights of the left and right frames 2 and 2 correspond to each other. It is supposed to match.

  Of the right base unit 1 located in the surrounding staircase portion S2 and the upper staircase portion S3, the upper surface of the lowermost frame body 2 has an upper horizontal frame member 2a as shown in FIGS. The lower-side receiving material 3 for height adjustment is attached and fixed in an upright manner adjacent to each other on the one side (left side in FIG. 6). ing. The height of the upper surface of the lower side receiving material 3 is the same as the height of the frame body 2 located in the lower half (eight steps from the bottom) of the intermediate step portion S2 in the base unit 1 on the left side (outside). The height of the upper surface of the upper receiving member 4 is the same as the height of the frame body 2 located in the upper half (9 steps from the bottom) of the intermediate step S2 in the base unit 1.

  In the right base unit 1, the six frames 2, 2,... Of the lower straight staircase portion S1 and the four frames 2, 2,. The spacer 10 is disposed at a right angle so as to form an L shape in plan view with the rear end of the former assembly facing the right side surface of the latter assembly, and both are made of square material having a predetermined thickness. Via a screw or the like (shown in FIG. 2), the right base unit 1 along the right boundary wall W of the staircase R is formed.

  The base units 1 and 1 on both the left and right sides of the staircase R are arranged along the boundary walls W, W,... On both the left and right sides of the staircase R, and each base unit 1 is in contact with or fixed to the field wall W. Instead, it stands on the floor F of the staircase R. The lower end of each base unit 1 is fixed to the floor surface F of the staircase R by, for example, screwing the lower frame material 2a on the lower side of each frame 2, and each base unit 1 and the boundary wall W are They are separated with a gap of a predetermined dimension.

  A damping mat (not shown) may be interposed between each base unit 1 and the floor surface F so as to obtain a higher damping effect and vibration insulating effect. As this damping mat, for example, a material having a high damping effect such as rubber, PVC, asphalt, or urethane foam is used.

  As a feature of the present invention, a structural face material 12 is integrally attached and fixed to the left and right base units 1 and 1. Specifically, among the left and right ground units 1, 1, the structural face material 12 made of structural plywood or the like is located in a portion located in the high step portion including the stepped portion S <b> 2 and the upper straight stepped portion S <b> 3 of the stairs S. It is attached and fixed integrally so as to straddle between the plurality of frames 2, 2,. As shown in FIG. 3, in the left base unit 1, the left side surfaces of the two frames 2, 2 in the lower half of the turning step S 2 (that is, the outer side on the opposite side of the opposing right base unit 1). The structural surface material 12 cut into a shape corresponding to both the frame bodies 2 and 2 is disposed on the side surfaces) over the both frame bodies 2 and 2. It is fixed to (horizontal frame 2a and vertical frame 2b). Further, as shown in FIG. 4, the left side surface (outer side surface) of the five frames 2, 2,... Of the upper half stepped portion S2 and the upper straight stepped portion S3 in the base unit 1 on the left side. Further, the structural face material 12 cut into a shape corresponding to the frame bodies 2, 2,... Is disposed so as to straddle the frame bodies 2, 2,. It is being fixed to frame 2,2, .... Further, as shown in FIG. 6, the right side surfaces (outer side surfaces) of the four frame bodies 2, 2,... At the upper half of the turning step S 2 and the upper straight step S 3 in the right base unit 1. Further, the structural face material 12 cut into a shape corresponding to the frame bodies 2, 2,... Is disposed so as to straddle the frame bodies 2, 2,. It is being fixed to frame 2,2, .... A gap of a predetermined dimension (for example, 6 mm) is provided between each structural face 12 and the field wall W. In FIGS. 3, 4, and 6, the structural face material 12 is indicated by oblique lines, and the structural face material 12 is located at the position of the oblique lines and is fixed to the base unit 1.

  In this embodiment, the structural face material 12 has a shape corresponding to an assembly of a plurality of frames 2, 2,... To be attached. It is sufficient that the shape is attached so as to straddle between the frames, and it is preferable that the frames 2, 2,.

  The left and right base units 1, 1 are integrally connected by reinforcing units 15 to 17 at three locations in the middle of the stairs around the staircase portion S <b> 2 and higher. Specifically, the lower reinforcing unit 15 is placed between the frame bodies 2 and 2 of the left and right base units 1 and 1 that are located on the sixth stage, which is the upper end of the lower straight staircase section S1 (which can be said to be the lower end of the surrounding staircase section S2). The lower reinforcing unit 15 connects the left and right ground units 1, 1 with the frame bodies 2, 2. In addition, between the frame 2 of the left base unit 1 corresponding to nine steps and the frame 2 of the right base unit 1 corresponding to seven steps, which is located at the upper end of the turning step S2, An intermediate reinforcing unit 16 is interposed, and the right and left base units 1, 1 are connected by the frame bodies 2, 2 by the intermediate reinforcing unit 16. Further, an upper reinforcing unit 17 is interposed between the frames 2 and 2 of the left and right base units 1, 1 corresponding to the 12 steps located at the upper end of the upper straight staircase S3. The left and right base units 1, 1 are connected at the frame bodies 2, 2. The heights of these reinforcing units 15 to 17 are lower than the heights of the frame bodies 2 and 2 of the left and right base units 1 and 1 to be connected. It is connected by ~ 17.

  FIG. 7 shows the lower reinforcing unit 15, FIG. 8 shows the middle reinforcing unit 16, and FIG. 9 shows the upper reinforcing unit 17. These reinforcement units 15-17 differ only in height, and other structures are the same. That is, each of the reinforcement units 15 to 17 is integrally connected with three vertical frame members 19, 19,... Extending in the vertical direction between the upper and lower horizontal frame members 18, 18 extending in the horizontal direction by screws or the like. The rectangular frame shape is formed by arranging the reinforcing units 15 to 17 between the frame bodies 2 and 2 of the left and right base units 1 and 1, and the vertical frame members of the frame bodies 2 and 2 By connecting 2b, 2b and the left and right vertical frame members 19, 19 of the reinforcing units 15-17 with screws or the like, the left and right base units 1, 1 are integrally connected by the reinforcing units 15-17. As shown in FIG. 4, an intermediate vertical frame member 2c is mounted and fixed between the upper and lower horizontal frame members 2a and 2a on the frame 2 of the left base unit 1 corresponding to nine steps. A vertical frame member 19 on the left side of the middle reinforcing unit 16 is fixed to the frame member 2c. Further, the reinforcing units 15 to 17 are fixed on the floor surface F with screws or the like in the lower horizontal frame member 18, and stand on the floor surface F.

  Since each said reinforcement unit 15-17 is a frame structure, the structural surface material (not shown) which consists of a structural plywood etc. of the same shape as this reinforcement unit 15-17 is attached to this reinforcement unit 15-17, The reinforcing units 15 to 17 may be reinforced, and the rigidity of the reinforcing units 15 to 17 and the rigidity between the base units 1 and 1 can be increased.

  A plurality of tread board mounting portions 6, 6,... Extending in the horizontal direction and a plurality of kick plate mounting portions 7, 7,. It is formed in a (step shape). That is, in the straight staircase portions S 1 and S 3, a tread plate mounting portion 6 is formed on the upper surface of each frame 2 of the base unit 1, and the lower frame 2 adjacent to the frame 2 on the front surface of the frame 2. The kick board attaching part 7 is formed in the level | step-difference part between these.

  Further, in the surrounding staircase portion S2, in the base unit 1 on the left side (outer side), a tread plate mounting portion 6 is formed on the upper surface of each frame body 2 in the same manner as the straight staircase portions S1 and S3. A kick plate attaching portion 7 is formed at a step portion between the front surface of the body 2 and the lower frame 2 adjacent to the frame 2. On the other hand, in the base unit 1 on the right side (inner side), a tread plate mounting portion 6 is formed on the upper surface of the seventh-stage frame 2 and the receiving members 3, 4, and the frame 2 and the receiving members 3, 4. A kick plate attaching portion 7 is formed at a step portion between the front surface of 4 and the lower frame 2 adjacent to the frame 2.

  In the left and right base units 1, 1, the tread plate 21 is bridged and fixed between the tread plate mounting portions 6, 6 corresponding to the left and right, and the kick plate mounting portions 7, the same height corresponding to the left and right, A kick plate 22 is bridged between the seven. A gap of a predetermined dimension (for example, 3 mm) is formed between the left and right end portions of each of the tread plate 21 and the kick plate 22 and each boundary wall W.

  Specifically, as illustrated in FIG. 10, each step board 21 in the straight staircase portions S <b> 1 and S <b> 3 and the surrounding staircase portion S <b> 2 is connected and integrated with a kick plate 22 adjacent to the upper side of the tread plate 21 by screws or the like. Thus, a tread unit 20 having an L-shaped cross section is configured. That is, the step board 21 is a plate-like thing extended in the left-right direction, and the rear end portion (one end portion in the width direction) is in contact with the front surface of the lower end portion of the rectangular plate-like kick plate 22 extending in the left-right direction at a right angle. In this state, the tread board 21 and the kick board 22 are integrally fixed with screws or the like to form the tread board unit 20. FIG. 10 shows the step board unit 20 in the straight staircase portions S1 and S3. The step board unit 20 in the surrounding staircase portion S2 is different in only the shape of the step board 21 although not shown.

  Each step board 21 in the straight staircase portions S1 and S3 is a rectangular plate material, and the width thereof is larger than the front and rear lengths of the corresponding step board attachment portions 6 of the base unit 1 by a predetermined dimension. In addition, as shown in FIG. 1, the lower and upper (7th and 9th) treads 21 in the rotating staircase portion S2 are right triangle plates, respectively, and the middle (eight steps) treads 21 are substantially rhombuses. Each of the plate members has a shape that is larger than the longitudinal length of the corresponding tread plate mounting portion 6 of the base unit 1 by a predetermined dimension. In addition, the kick board 22 located in the lowest step of the staircase S is used alone and does not constitute the tread board unit 20 in combination with the tread board 21.

  In the surrounding staircase portion S2, the kick plate mounting portion 7 of the base unit 1 is formed on the front surface of the base unit 1, whereas the kick plate 22 is not parallel to the front surface of the base unit 1 and is predetermined. The spacer (not shown) is disposed between the front surface of the base unit 1 and the kick plate 22 so as to fill the angular difference therebetween.

  As illustrated in FIG. 12, a kick plate concave groove 21 a extending in the left-right direction (the length direction of the tread plate 21) is formed in the front end portion of the bottom surface of the tread plate 21 in the tread plate unit 20. In the construction state in which 20,... Are fixed to the base units 1, 1, the upper end portion of the kick plate 22 in the stair unit 20 adjacent to the lower side is fitted into the groove 21a for the kick plate. . At that time, an elongated rubber mat 23 having a thickness of, for example, about 6 mm is interposed between the bottom surface in the groove 21a for the kick plate and the upper end portion of the kick plate 22.

  The tread board unit 20 is fixed to the base units 1 and 1 with screws or the like from the front side (upper surface side) of the tread board 21. Specifically, the kick plate 22 of each tread unit 20 is opposed to the kick plate mounting portions 7 and 7 of the left and right base units 1 and 1 on the rear surface (back surface), and in this state, the left and right end portions of the tread plate 21 are viewed from the front side. It is fixed to the tread board attaching portions 6 and 6 of the base units 1 and 1 with screws or the like. At this time, as shown in FIGS. 3 to 6, for example, between each tread plate 21 and the tread plate mounting portion 6 of the base unit 1 and between each kick plate 22 and the kick plate mounting portion 7 of the base unit 1, for example, A belt-shaped rubber mat 24 having a thickness of about 6 mm is interposed so as to be continuous. Further, the tread unit 20 is fixed in a state in which the front end portion of the tread plate 21 protrudes forward by a predetermined dimension (for example, 30 mm) from the position of the upper end portion of the kick plate 22 of the tread plate unit 20 adjacent to the lower side.

  Further, as shown in FIG. 11, a nose member 28 is fixed to the front end portion (step nose portion) of the tread plate 21 in each tread plate unit 20 so that a person who goes up and down the stairs S does not slip on the tread plate. ing.

  The nosing member 28 will be described in detail. The nosing member 28 includes a base portion 29 that is directly fixed to the tread plate 21 and a cover portion 35 that is detachably assembled to the base portion 29. The base portion 29 is made of, for example, an extruded material of hard resin such as ABS, PP, PS, etc. in addition to PVC resin.

  The base portion 29 is a flat plate whose lower surface is fixed to the front end portion of the upper surface of the tread plate 21, and a rear end portion (right end portion in FIG. 11) which is one end side in the width direction on the upper surface of the base portion 29. The first concave groove portion 31 extending in the length direction of the base portion 29 and the similar second concave groove portion 32 are formed at substantially the center in the width direction over the entire length direction of the base portion 29. Yes. The front and rear side portions of the opening of each groove 31, 32 protrude toward the center of the opening over the entire length direction of the groove 31, 32, and the first and second recesses are formed by this protrusion. The groove portions 31 and 32 are formed in a groove having an opening that has a groove width that is narrower than that of the intermediate portion in the groove depth direction.

  The cover portion 35 is also made of a resin extrusion molding material. The cover portion 35 is made of a soft resin such as TPE (for example, TPO, TPU) in addition to a PVC resin, for example.

  The cover portion 35 has a flat plate-like mounting portion 36 that is removably assembled to the upper surface of the base portion 29 on the lower surface (the surface facing the base portion 29), and a front end portion (one end in the width direction) of the mounting portion 36. A flat plate-like front surface portion 37 that is integrally formed continuously and extends downward in a direction orthogonal to the mounting portion 36, and the cover portion 35 has a substantially L-shaped cross section by the front surface portion 37 and the mounting portion 36. Has been. In the assembled state in which the nose member 28 is attached to the tread plate 5, the base portion 29 is fixed to the front end portion of the top surface of the tread plate 5, and the cover portion 35 is assembled to the base portion 29 as will be described later. The front surface portion 37 covers the front end surface of the tread base material 6 of the tread plate 5, and in this state, the front surface portion 37 is fixed to the front end surface of the tread base material 6 with a double-sided tape.

  A locking portion 38 extending toward the rear side is integrally formed at the lower end portion of the front surface portion 37. As shown in FIG. 11, when the nose member 28 is attached to the tread board 5, the latching portion 38 is brought into press contact with the lower surface of the tread board base 6 by its elasticity.

  On the upper surface of the mounting portion 36, a plurality (three in the illustrated example) of anti-slip grooves 40, 40,... Extending in parallel with each other in the length direction are formed side by side in the width direction. At the rear end portion (the right end portion in FIG. 11) which is the other end in the width direction of the mounting portion 36, a covering portion 41 whose thickness decreases toward the front end is integrally formed over the entire length direction of the mounting portion 36. Is formed. As shown in FIG. 11, when the nose member 28 is attached to the tread plate 5, the covering portion 41 is configured so that the tip portion is pressed against the upper surface of the surface material 7 of the tread plate 5 by elasticity and covers the front portion. .

  On the lower surface of the mounting portion 36, at the rear end thereof, there is a single plate-like first ridge portion 43 extending in the length direction of the cover portion 35 (mounting portion 36), and at the substantially central portion in the width direction. One second ridge 45 extending in the length direction of the cover portion 35 (mounting portion 36) is integrally formed so as to protrude downward, and these ridge portions 43, 45 are formed on the mounting portion 36. It is provided over the entire length direction. The first ridge portion 43 has a taper-shaped cross section at the tip side, and the thickness, which is the dimension in the front-rear direction (left-right direction in FIG. 11), is the opening of the first concave groove portion 31 of the base portion 29. The downward projecting height is set to be smaller than the groove depth of the first concave groove portion 31. A stopper 44 having a square cross section is integrally formed at the tip of the first ridge 43. The thickness of the first ridge 43 at the retaining portion 44 is set to be larger than the groove width of the opening of the first groove 31, and the first ridge 43 is fitted to the first groove 31. In this case, the retaining portion 44 is deformed and is inserted into the first concave groove portion 31 so as to be caught in the projecting portions on both sides of the first concave groove portion 31. The strip 43 is prevented from coming out of the first groove 31.

  On the other hand, unlike the 1st protruding item | line part 43, the 2nd protruding item | line part 45 is thicker than the thickness (dimension of the front-back direction) of the 1st protruding item | line part 43, and is lower than the protrusion height of the 1st protruding item | line part 43. It is in the shape of a square bar having a rectangular section. The thickness of the second ridge 45 is set to be smaller than the groove width of the opening of the second groove 32 of the base portion 29, and the protruding height is set to be smaller than the groove depth of the second groove 32. The second ridge 45 can be fitted into the second concave groove 32 of the base 29 from the opening, and in the fitted state, the second ridge 45 in the thickness direction of the second ridge 45 can be fitted. A gap is formed between each side surface and the protruding portion on both side edges of the opening of the second concave groove 32.

  With the above structure, the first and second protruding strips 43 and 45 of the cover part 35 are fitted into the first and second concave groove parts 31 and 32 of the base part 29, respectively. It is designed to be removably assembled.

  Further, a surface finishing material 47 having a cushioning property is attached and fixed to the upper surface of the tread plate 21 in the range from the nose member 28 to the rear side (back side) to the kick plate 22 with an adhesive or the like. As a result, the upper surface of the tread plate 21 is covered with the surface finishing material 47, and screws and the like for fixing the tread plate unit 20 to the base unit 1 from the front side (upper surface side) in the tread plate 21 are concealed. As the surface finishing material 47 having this cushioning property, for example, sheet decoration MDF + PVC mat + nonwoven fabric (or urethane foam) or the like is used.

  Between the right and left base units 1 and 1 (structural surface material 12) and the boundary walls W and W of the staircase R in the straight staircase portions S1 and S3 and the surrounding staircase portion S2, and the tread plate 21 of each tread unit 20 In addition, gaps are left between the left and right end portions of the kick plate 22 and the boundary walls W, W, but the baseboards for concealing the clearance when viewed from above (external) are provided on each boundary wall W. (Not shown) is fixedly attached to the base plate 1 and the tread plate 21 and the kick plate 22 of each tread unit 20 in a non-contact state.

  As shown in FIG. 12, the staircase S is the uppermost step and continues to the second floor F2 in a stepped manner. The uppermost stepboard unit 20 includes a stepboard 21 and a thin kick plate 22 fixed to the rear end surface. The upper end of the thin plate kick plate 22 is fixed to the front end of the lower surface of the front staircase 51 constituting the second floor F2, and the front staircase 51 is the upper part of the horizontal member 50 (frame). The kick plate 22 has a predetermined gap (for example, 3 mm) with respect to the front surface of the horizontal member 50. In this way, the upper end of the staircase S is connected to the front staircase 51 only by the kick plate 22 made of a thin plate, and the horizontal member 50 is separated with respect to vibration. It is prevented from being transmitted as sound to the space below the staircase S without being transmitted to the base material 50.

  As shown in FIG. 13, a bundle 56 is provided in the underfloor structure of the staircase R. That is, on the lower side of the floor material 55 that forms the floor surface of the staircase R, a plurality of steel bundles 56, 56,... Extend in the front-back direction in which the base unit 1 extends on the foundation B at a position directly below each base unit 1. , And a large pull 57 is placed and supported between the upper ends of the plurality of steel bundles 56, 56,..., And a plurality of joists 58, 58,. Is placed on the joists 58, 58,..., And the floor material 55 is reinforced by the steel bundles 56, 56,. The rigidity of the floor material 55 is increased.

  Next, a method for constructing the soundproof staircase S having the above configuration will be described. First, for example, at the construction site of the staircase S, the right and left base units 1, 1 of the straight staircase portions S1, S3 and the surrounding staircase portion S2 are assembled. Since the base unit 1, 1 is composed of an assembly of a plurality of frames 2, 2,... Having different heights, the frames 2, 2,. Are connected to each other, and base units 1, 1 having stepped plate mounting portions 6, 6,... And kick plate mounting portions 7, 7,.

  At this time, the structural surface material 12 is placed on the outer surface of the portion of the base unit 1 composed of the aggregate of the frame bodies 2 at the higher step portion of the surrounding staircase portion S2 or more. … Attach with screws etc. so as to straddle between.

  The formation of the base unit 1 by the frames 2, 2,... And the attachment of the structural face material 12 to the base unit 1 may be performed in advance in a factory or the like and only carried in at the construction site. At that time, as described above, the structural face material 12 can have a shape corresponding to an aggregate of a plurality of frames 2, 2,. Conversely, when assembling everything at the construction site, the structural face material 12 is a small shape that is attached so as to straddle between a plurality of frames 2, 2,. It is good to do.

  Next, the left and right base units 1, 1 assembled in this way are placed in the staircase R, and the lower ends of the base units 1 are fixed with screws or the like at the lower horizontal frame member 2 a of each frame 2. As a result, both base units 1 and 1 are made to stand on the floor surface F of the staircase R with gaps between the walls W, W,.

  At that time, it is constant at the corners and intermediate portions of the side walls (left side surface in the left base unit 1 and right side surface in the right base unit 1) of each frame 2 and the structural surface material 12 in each base unit 1 on the side wall W side. A gap adjustment material (not shown) having a thickness may be attached, and the base unit 1 may be erected so that the gap adjustment material abuts against the boundary wall W. By doing so, a certain gap can be formed between the base unit 1 and the boundary wall W.

  The gap adjusting material may be removed after the base unit 1 is fixed to the floor surface F. Alternatively, the base unit 1 comes into contact with the wall W, but if the material for adjusting the gap is a material having a high damping effect such as rubber, PVC, asphalt, or urethane foam, it is not removed. You may leave it as it is. That is, if the ground unit 1 is fixed to the wall W with screws or the like, for example, the vibration of the ground unit 1 (step S) is transmitted to the field wall W through the screws or the like. In contrast, if the gap adjusting material having a high damping effect is interposed between the base unit 1 and the field wall W, the vibration of the staircase S is hardly transmitted to the field wall W. Thus, workability is improved by leaving the gap adjusting material.

  Further, the high portions of the left and right base units 1 and 1 are fixed by bridging a rod-shaped member, and are prevented from shaking so that a fixed gap is formed between each base unit 1 and the field wall W. It may be.

  When the base unit 1 or 1 is fixed to the floor surface F of the staircase R by the lower horizontal frame member 2a of the frame 2 with a screw or the like, a high step portion including the surrounding staircase portion S2 and the upper straight staircase portion S3 is provided. Since the structural surface material 12 attached to each of the left and right base units 1 and 1 is located on the outer surface of each base unit 1, the operator enters between the base units 1 and 1. What is necessary is just to fix the lower side frame material 2a of the frame body 2 located inside (the center side of the floor surface F) from the structural surface material 12 with screws or the like. Therefore, if the structural face material 12 is attached to the inner surface of the frame body 2, the frame body 2 enters the narrow space between the structural wall material 12 and the boundary wall W from the outside of the structural face material 12. There is no need for fixing, and the base unit 1 with the structural face material 12 can be easily constructed. In addition, when attaching the structural surface material 12 to the frame 2 of the base unit 1 at the construction site, there is no such limitation, and after the base unit 1 is first fixed to the floor surface F1, the base unit 1 When attaching the structural face material 12, an operator can enter between the two base units 1, 1 to attach the structural face material 12 to the inner surface of the base unit 1.

  The left and right base units 1 and 1 are respectively reinforced at the lower, middle and upper stages at the upper end of the lower straight staircase S1, the upper end of the surrounding staircase S2 and the upper end of the upper straight staircase S3. The units 15 to 17 are integrally connected. Specifically, it arrange | positions so that each reinforcement unit 15-17 may be pinched | interposed between both frame bodies 2 and 2 of the right and left base units 1, 1, and both frame bodies 2 and 2 and reinforcement units 15-17 may be screwed or the like. The reinforcing units 15 to 17 are also fixed to the floor surface F with screws or the like in the lower horizontal frame member 18. As a result, the left and right base units 1 and 1 are integrally connected and fixed by the reinforcing units 15 to 17 at three positions.

  In parallel with the mounting and fixing of the structural surface material 12 to the base unit 1 and the construction of the base units 1, 1 and the reinforcing units 15 to 17, each step board 21 is adjacent to the upper side of the step board 21 in advance. Are integrated with each other by connection to form a plurality of step board units 20, 20,... Having an L-shaped cross section.

  Then, in the left and right base units 1, 1, the kick plate 22 is disposed on the kick plate mounting portions 7, 7 positioned at the lowest stage of the lower straight staircase portion S 1, and the kick plate 22 is fixed with screws or the like. A rubber mat 24 is interposed between the kick plate 22 and the kick plate mounting portion 7 of the base unit 1.

  Next, the tread board unit 20 is arranged on the tread board attaching parts 6 and 6 and the upper kick board attaching parts 7 and 7 located at the lowermost stage of the lower straight stair part S1, and the left and right ends of the kick board 22 of the tread board unit 20 are arranged. The tread plate 21 is fixed to the tread plate mounting portions 6 and 6 from the front side (upper surface side) with screws or the like with the portion corresponding to the kick plate mounting portions 7 and 7 on the rear surface (back surface). At that time, the upper end of the kick plate 22 adjacent to the lower side is fitted into the groove 21a for the kick plate at the front end of the lower surface of the tread plate 21, and the bottom surface in the groove 21a for the kick plate and the upper end of the kick plate 22 are fitted. A rubber mat 23 is interposed between the two parts. Further, rubber mats 24 are interposed between the tread plate 21 and the tread plate mounting portion 6 of the base unit 1 and between the kick plate 22 and the kick plate mounting portion 7 of the base unit 1.

  Then, in the same manner as described above, the second-stage tread board unit 20 is fixed to the base unit 1, 1, and the rubber mat 24 is attached to the upper end of the kick board 22 in the lower tread board unit 20 in the concave groove 21 a of the tread board 21. The rubber mat 24 is interposed between the tread plate 21 and the tread plate mounting portion 6 of the base unit 1 and between the kick plate 22 and the kick plate mounting portion 7 of the base unit 1.

  Thereafter, in the same manner, the tread board units 20, 20,... Are attached and fixed in order to the surrounding staircase portion S2 and the upper straight staircase portion S3 of the base unit 1,1. At that time, the tread plate 21 and the kick plate 22 of each tread plate unit 20 are attached with their left and right ends spaced apart from the boundary walls W, W.

  When the tread board units 20, 20,... (The tread board 21 and the kick board 22) are attached to all the stairs S, the base portion 29 of the nosing member 28 is then attached to the front end of each tread board 21 with double-sided tape, staples, screws, and the like. The surface finishing material 47 having cushioning properties is fixed to the upper surface of the step board 21 on the rear side (back side) of the nose member 28, and then the cover portion 35 is attached to the base portion 29 of the nose member 28.

  Finally, a baseboard is attached to the boundary wall W to conceal the gap between the base unit 1 or the tread board unit 20 and the boundary wall W when viewed from the upper side (outside). Thus, the construction of the staircase S is completed.

  Therefore, in this embodiment, the right and left base units 1 and 1 are provided in the straight staircase portions S1 and S3 and the surrounding staircase portion S2 of the staircase S constructed in the staircase room R, and the lower end portions of the staircase room R The base unit 1 is provided in a self-supporting state, fixed to the floor surface F, and the base unit 1 is not fixed to the boundary wall W, but a gap is formed between them. Further, the tread plate 21 and the kick plate 22 are bridged between the kick plate mounting portions 7 and 7, respectively, and a gap is formed between the left and right ends of each step plate 21 and each kick plate 22 and the field walls W and W. Has been. Therefore, the staircase S including the left and right base units 1, 1, the tread plate 21 and the kick plate 22 is fixedly supported on the floor surface F of the staircase R and separated from the left and right boundary walls W, W. Thus, the staircase S including the base units 1, 1, the tread plate 21 and the kick plate 22 is insulated from the field walls W, W. As a result, noise and vibration when a person goes up and down the stairs S are transmitted to the first floor room adjacent to the boundary walls W, W through the boundary walls W, W as much as possible. Sufficient soundproofing performance can be ensured.

  And since the surface finishing material 47 which has cushioning properties is attached and fixed to the upper surface of each tread board 21, the walk sound when a pedestrian steps on the tread board 21 can be reduced.

  Further, rubber mats 23 are interposed between the tread plate 21 and the tread plate mounting portion 6 of the base unit 1, and between the kick plate 22 and the kick plate mounting portion 7 of the base unit 1. The kick plate 22 is connected to the kick plate fitting groove 21a of the tread plate 21 in a state where the upper end portion of the kick plate 22 is fitted, and a rubber mat 24 is interposed in the fitting portion. The walking sound when stepping on the tread 21 can be further reduced.

  And since the upper surface of each tread 21 is covered with the surface finishing material 47 fixed to the upper surface, the tread unit 20 is fixed to the base unit 1 with screws or the like from the front side (upper side) on the tread 21. However, the screws and the like can be concealed by the surface finishing material 47, and the screws and the like are not exposed on the upper surfaces of the respective treads 21, and the aesthetics of the stairs S are maintained.

  In addition, the tread plate attaching portions 6, 6,... And the kick plate attaching portions 7, 7,... Are formed in a staircase pattern on the base unit 1, 1, and the tread plate 21 is attached and fixed to these tread plate attaching portions 6. Since the kick plate 22 is disposed in the portion 7, it is not necessary to separately fix the doll stage or the side plate to the boundary walls W, W, and the construction of the staircase S can be easily performed correspondingly.

  Further, the left and right base units 1 are arranged in series in order of height so that a plurality of rectangular frames 2, 2,... Having different heights are positioned on the same plane. Since the frame structure is integrally connected and the tread plate mounting portion 6 is formed on the upper surface of each frame body 2, the base unit 1 is configured by a combination of a plurality of frame bodies 2, 2,. That is, the base unit 1 can be easily manufactured, and the construction at the construction site becomes easy.

  Further, since the left and right base units 1 and 1 are integrally connected by the reinforcing units 15 to 17 at three places in the front-rear direction, the staircase S is supported only on the floor surface F. In particular, the rigidity in the left-right direction of the high step portion including the surrounding staircase portion S2 and the upper straight staircase portion S3 can be largely ensured. As a result, the soundproof performance of the staircase S can be stably maintained, and the construction stability is also improved.

  Each base unit 1 has a frame structure in which a plurality of rectangular frames 2, 2,... Having different heights are integrally connected, and from these, the surrounding staircase portion S2 and the upper straight staircase portion 3 Since the structural face material 12 is attached to each of the left and right base units 1 located in the high step portion so as to straddle the plurality of frames 2, 2, ..., the base unit 1 has a frame structure. Even in such a case, a large rigidity is ensured also in the front-rear direction of the base unit 1 by the structural face material 12 connected across the frames 2, 2,. Also by this, the soundproof performance of the staircase S can be maintained more stably, and the construction stability is further improved.

  In this embodiment, each tread 21 is connected and integrated with a kick plate 22 adjacent to the upper side of the tread 21 to form a step board unit 20 having an L-shaped cross section. Since it is fixed to the units 1, 1, it is possible to simultaneously construct the kick plate 22 together with the tread plate 21 simply by fixing the tread unit 20 to the base unit 1, 1. In addition, since it is only necessary to fix the tread board unit 20 from the front side of the tread board 21, labor for fixing from the back side becomes unnecessary, thereby improving the workability.

(Other embodiments)
In the above embodiment, the left and right base units 1, 1 have a frame structure in which the frame bodies 2, 2,... Are arranged. However, a structure other than such a frame, for example, a panel body can be adopted. What is necessary is just to fix a body to the floor F and to become independent. In that case, it is not necessary to attach the structural surface material 12 to the base unit 1, and it is only necessary to interpose the reinforcing units 15 to 17 between the base units 1 and 1. However, it is preferable to use the framework structure in that the base units 1 and 1 can be easily manufactured.

  In the above embodiment, the tread plate 21 and the kick plate 22 are integrated to form the tread unit 20, and the tread unit 20 is fixed by the tread plate 21, but the tread plate 21 is not provided. And the kick plate 22 can be independently fixed to the tread plate mounting portions 6, 6,... And the kick plate mounting portions 7, 7,. However, it is preferable to provide the tread unit 20 in terms of improving workability.

  Further, in the above embodiment, the staircase S is a combination of the straight staircase portions S1 and S3 and the surrounding staircase portion S2, but the present invention can be applied even to a staircase having only a straight staircase portion. . In that case, the reinforcing units 15 to 17 similar to those of the above-described embodiment are interposed and fixed between the left and right base units located at a high step portion of a predetermined step portion (for example, six steps) or more from the floor surface. Alternatively, the structural surface material 12 similar to that of the above-described embodiment may be attached to the left and right base units located in the high step portion so as to straddle between the plurality of frames 2, 2,. In addition, the tread plate 21 and the kick plate 22 (the tread plate unit 20) may be bridged over the opposing surfaces of the foundation units 1 and 1 instead of being bridged over the upper units 1 and 1.

  In the present invention, noise and vibration during use of a staircase constructed in a staircase can be reduced as much as possible to the room through the field wall to ensure sufficient soundproofing performance, and the rigidity of the high step portion can be secured. Since the soundproofing performance and construction stability can be maintained by increasing the height, industrial applicability is high.

S Soundproof staircase S1 Lower straight staircase S2 Staircase around (high step)
S3 Upper straight staircase (high step)
R Staircase W Wall wall F Floor 1 Ground unit 2 Frame 3 Lower side receiving material 4 Upper side receiving material 6 Tread plate mounting portion 7 Kick plate mounting portion 12 Structural surface material 15 Lower reinforcing unit 16 Middle reinforcing unit 17 Upper reinforcing Unit 20 Tread plate unit 21 Tread plate 22 Kick plate 23 Rubber mat 24 Rubber mat 28 Nose member 29 Base portion 35 Cover portion 47 Surface finish material 56 Steel bundle

Claims (8)

A soundproof staircase in a staircase in the building,
With left and right base units provided on the left and right sides of the staircase,
Each of the base units is not fixed to the left and right boundary walls of the staircase, but is fixed to the floor surface of the staircase with its lower end fixed to the floor surface of the staircase and spaced from the boundary wall. And
In each base unit, a tread plate mounting portion extending in the horizontal direction and a kick plate mounting portion extending in the vertical direction are alternately formed in a step shape,
A tread is spanned between corresponding tread plate mounting portions of the same height of the right and left base units, and a kick plate is spanned between the corresponding same height kick plate mounting portions,
A gap is formed between the left and right ends of each tread plate and each kick plate and the boundary wall,
A reinforcement unit is interposed between the left and right ground units located at a high step portion at a predetermined height from the floor, and the left and right ground units are integrally connected by the reinforcement unit. Soundproof staircase characterized by. A soundproof staircase in a staircase in the building,
With left and right base units provided on the left and right sides of the staircase,
Each of the base units is not fixed to the left and right boundary walls of the staircase, but is fixed to the floor surface of the staircase with its lower end fixed to the floor surface of the staircase and spaced from the boundary wall. And
Each of the base units has a frame structure in which a plurality of rectangular frames having different heights are arranged in series in the order of height so that the planes in the frames are positioned on the same plane, and are integrally connected. Have
In each base unit, a tread plate mounting portion extending in the horizontal direction and a kick plate mounting portion extending in the vertical direction are alternately formed in a step shape,
A tread is spanned between corresponding tread plate mounting portions of the same height of the right and left base units, and a kick plate is spanned between the corresponding same height kick plate mounting portions,
A gap is formed between the left and right ends of each tread plate and each kick plate and the boundary wall,
On each left and right base unit located at a high step part higher than the predetermined step part from the floor surface, the structural face material is attached integrally so as to straddle between the frames of the high step part Soundproof staircase characterized by being made. In claim 2,
A soundproof staircase, wherein a reinforcing unit is interposed between left and right ground units located in a high step portion, and the left and right ground units are integrally connected by the reinforcing unit. In claim 2 or 3,
The soundproof staircase, wherein the structural face material is attached to an outer surface on the opposite side of the opposing base unit in the base unit frame. In any one of Claims 1-4,
A tread board and a kick board adjacent to the upper side of the tread board are connected and integrated to provide a tread board unit having an L-shaped cross section,
The soundproof staircase, wherein the tread board unit is fixed to at least a base unit from the front side of the tread board. In any one of Claims 1-5,
A soundproof staircase characterized in that a cushioning surface finishing material is attached and fixed to the upper surface of the tread board. In any one of Claims 1-6,
A lower straight staircase having a lower end fixed to the floor, a surrounding staircase connected to the upper end of the lower straight staircase, and an upper straight staircase connected to the upper end of the surrounding staircase ,
The soundproof staircase, wherein the high step portion is a step portion higher than the above staircase portion. It is a construction method of the soundproof stairs of claim 1 or 2,
The left and right ground units on the floor of the staircase are self-supported with the lower end fixed to the floor and a gap from the staircase wall.
A step board and a kick board adjacent to the upper side of the step board are connected and integrated to form a step board unit having an L-shaped cross section,
The above-mentioned tread board unit is fixed to the base unit from the front side of the tread board in a state where the step board and the kick board leave a gap with the boundary wall of the staircase, so that the tread board is also inserted between the tread board mounting portions of the left and right base units, and the kick board A construction method of a soundproof staircase, characterized in that a kick plate is bridged between the mounting portions.

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