JP6469049B2 - Soundproof staircase and its construction method - Google Patents

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.

  Therefore, conventionally, as shown in Patent Document 1, for example, as a soundproof staircase to be constructed in a staircase in a building, left and right side plates for supporting a step board (step board) at left and right ends are used as a boundary wall of the staircase. For this reason, there is a gap between the tread board and the field wall. Proposals have been made to obtain soundproofing performance by making it difficult to transmit vibration to the wall.

Japanese Patent Laid-Open No. 2006-89415

  In this Patent Document 1, since the side plate of the staircase and the boundary wall of the staircase are fixed via a vibration isolator and a gap is formed between them, the vibration and noise of the staircase are transmitted to the boundary wall. Can be suppressed to some extent. However, because the stairs are not completely separated from the wall, and the side plates of the stairs are connected to the wall by vibration-proofing materials and fixing brackets, there is a limit to improving the soundproofing performance and sufficient soundproofing performance There is a problem that it is difficult to get.

  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. This is to make it difficult for vibration to be transmitted and to obtain sufficient soundproofing performance.

  In order to achieve the above object, in the present invention, the left and right side plates of the staircase are not fixed to the boundary wall, but the left and right ground unit are self-supporting on the floor surface of the staircase, and the step board and the kick-in are placed between the ground units. By supporting the board, the stairs are completely separated from the wall.

Specifically, a first invention is provided in the stairwell of a building, as soundproofing stairs that have a and a lower portion connected to the upper part and the upper step portion, the upper portion of the stairway Left and right base units provided along the left and right boundary walls of the staircase are provided on both the left and right sides, and each base unit is provided in a rectangular frame shape by connecting and integrating square members and has a height from each floor surface. A plurality of rectangular frames having different thicknesses have a frame structure in which planes passing through the frames are positioned on the same plane and arranged in series in the order of height and integrally connected. Yes. In addition, each base unit is not connected to the left and right boundary walls of the staircase, and the lower end is fixed to the floor surface of the staircase and has a gap with the boundary wall, and is independent on the floor surface of the staircase. 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, and the corresponding tread mounting portions of the left and right base units have the same height. Between the step board and the corresponding kick board mounting portion of the same height, the kick board is bridged, and a gap is formed between the left and right ends of each step board and each kick board and the field wall , The lower step portion is composed of a power girder step portion in which a step plate and a kick plate are bridged between left and right force girders, and an upper end portion of the power girder step portion is connected to a base unit of the upper step portion. On the other hand, the lower end is fixed to the floor of the staircase .

In the first invention, the left and right ground units in the upper stage 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 connected to the field wall. There is a gap between the tread plate mounting parts of the left and right base units, and the kick plate between the kick plate mounting parts. Since there is a gap between the walls, the stairs including the left and right base units, treads and kick boards are fixedly supported on the floor of the staircase and completely separated from the left and right boundary walls. It becomes the structure made. 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.

Furthermore, since the left and right ground units are connected by a tread plate and a kick plate spanned between them, the staircase rigidity can be ensured .

Also, different rectangular frame body height from the floor surface, in Rukoto integrally coupled are arranged in series in the order of the through each frame and the height are positioned on the same plane, A base unit is constituted by these frames. Thus, a base unit can be easily produced by comprising a base unit by the combination of a some frame.

In addition, the soundproof staircase has a lower step portion connected to the upper step portion, and the lower step portion is composed of a power girder staircase portion. The staircase can be constructed simply by fixing the lower end of the power girder to the floor surface, and the workability during construction of the staircase can be improved as compared with the entire staircase having a base unit.

The second invention is characterized in that, in the first invention, the distance between the left and right force girders in the power girder step portion is narrower than the distance between the left and right base units in the upper step portion.

According to a third invention, in the first or second invention, the left and right base units are integrally connected by a connecting member. According to a fourth aspect, in the third aspect, the connecting member is self-supporting on the floor surface of the staircase.

In the third and fourth aspects of the invention, the left and right base units are integrally connected by the connecting member, so that the rigidity in the left and right direction of the stairs can be further ensured .

  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.

7th invention is the construction method of the soundproof staircase of 1st invention, Comprising: The floor unit of an upper step part is attached to the floor surface of a staircase, The lower end part is fixed to a floor surface, and the boundary wall of a staircase room Standing independently with a gap between them, the left and right base units are integrally connected to the floor surface of the staircase by a connecting member that stands on its own, and the left and right force beams are bridged between the connecting member and the floor surface. A tread board and a kick board adjacent to the upper side of the tread board are connected and integrated to form a step board unit having an L-shaped cross section, and the tread board unit is connected to the base unit and the power girder from the front side of the tread board. Is fixed with a clearance from the wall of the staircase, so that the treadle is placed between the treadle mounting parts of the left and right base units and between the left and right force girders, and between the kick plate attaching parts and between the left and right force girders . It is characterized by laying over the kick boards.

According to the seventh aspect, the same effect as that of the first aspect can be achieved. In addition, a tread board unit having an L-shaped cross section is formed by the tread board and the kick board adjacent to the upper side thereof, and the tread board unit is fixed to the ground unit and the power girder from the front side of the tread board, so by simply fixing the tread board unit, A kick board and a step board can be installed at the same time, and the labor of fixing the tread unit from the back side of the tread is not required, 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, in the upper step part, the left and right ground units of the frame structure are spaced from the boundary wall of the staircase in the staircase. Place the base unit on the floor surface of the staircase and fix it, and bridge the tread board and the kick board between the base units, while the lower stage has the tread board and the kick board on the left and right power girders. By using the power girder staircase that has been passed , the staircase is fixedly supported on the floor of the staircase and completely separated from the left and right boundary walls and insulated. It is possible to reduce noise and vibration from being transmitted to the room through the wall as much as possible, and to ensure sufficient soundproofing performance for the room. In addition, there is no need to separately fix the stairs or side plates to the wall, making it easy to construct stairs and securing the stairs rigidity by connecting the left and right base units with treads and kicking plates. it can, Ru it is possible to improve the workability during construction of stairs.

Figure 1 is a plan view of a soundproof staircase according to an exemplary shape condition 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. FIG. 5 is a front view of a temporary fixing member for connecting the left and right base units. FIG. 6 is a front view of a force girder support member for connecting the upper end portion of the force girder in the power girder step portion to the left and right base units. FIG. 7 is an enlarged perspective view illustrating the tread board unit. FIG. 8 is an enlarged cross-sectional view showing the tread board to which the nosing member and the surface finish are attached. FIG. 9 is a view corresponding to FIG. 2 showing a state in which the tread board and the kick board are removed in the soundproof staircase according to the reference embodiment . 10 is a cross-sectional view taken along line XX of FIG.

  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.

(Working-shaped state)
Figure 1 shows a soundproof stair S according to the embodiment forms state of the present invention, the soundproof stair S is provided in the stairwell R, for example in buildings, such as two-story rental apartment. 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. Further, the space of the staircase R is divided up and down by the staircase S. As shown in FIG. 3, the storage space R1 of the first-floor dwelling unit with the staircase S as a ceiling portion (see FIG. 3) below the staircase S. 3, the ceiling position is indicated by R1).

  The soundproof staircase S has, for example, nine steps of a straight staircase portion S1 extending obliquely upward in a straight line from the floor F on the first floor of the building, and a lower end connected to the upper end of the straight staircase portion S1. For example, there are three staircase sections S2 that are bent 90 degrees counterclockwise in plan view and extend obliquely upward.

  In the following description, for convenience of explanation, the left side and the right side in the upward direction of the staircase S including the straight staircase portion S1 and the surrounding staircase portion S2 are referred to as “left” and “right”, respectively, and the front side (lower step) Side) is called “front” and the back side (upper side) is called “rear”. Accordingly, the turning step S2 is bent counterclockwise toward the upper side. Moreover, the step part in the staircase S is shown with the circled number by drawing.

  The structure of the upper staircase portion S1 (for example, 7 to 9 steps from the bottom) and the surrounding staircase portion S2 (10 to 12 steps) are the lower steps (1 to 6 steps) of the straight staircase portion S1. Is different.

  That is, as shown in FIGS. 2 and 3, the upper and lower steps of the straight staircase S <b> 1 and the surrounding staircase S <b> 2 are provided with left and right ground units 1, 1 positioned on the left and right sides of the staircase R, respectively. .

  For example, as shown in FIG. 3, the right base unit 1 has a frame structure in which a plurality (seven in the illustrated example) of rectangular frames 2, 2,. The frame bodies 2, 2,... Are basically different in height. Each frame 2 uses, for example, a 30 mm square member, and two vertical frame members 2b, 2b extending in the vertical direction are connected by screws or the like between the upper and lower horizontal frame members 2a, 2a extending in the horizontal direction. These are integrated into a rectangular frame shape, and the frame bodies 2, 2,... Having different heights are formed by making the heights of the vertical frame members 2b, 2b of each frame body 2 different. And, for example, five frame bodies 2, 2,... Having different heights are provided at the upper step portion of the straight staircase portion S1 and the lower half portion (10 steps and 11 steps from the bottom) of the surrounding staircase portion S2. 2 are arranged in series in the order of height so as to be positioned on the same vertical plane extending along the right boundary wall W and are integrally connected by screws or the like. . On the other hand, in the upper half part (11 steps and 12 steps from the bottom) of the surrounding staircase part S2, for example, two 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 rear boundary wall W, and are integrally connected by screws or the like. The lower half frames 2, 2,... And the upper half frames 2, 2 in the surrounding staircase portion S2 are integrally connected at right angles by screws or the like so as to be L-shaped in plan view. The base unit 1 is formed along the boundary walls W, W on the right side and the rear side of the staircase R by connecting the plurality of frames 2, 2,. Of the four frames 2, 2,... Located in the surrounding staircase S2 of the base unit 1, the upper frame 2 and the lower half of the upper half are located in the middle of the upper and lower stages. These frame bodies 2 have the same step (11 steps from the bottom), have the same height, and intersect at right angles in plan view.

  In the frame structure of the base unit 1, as shown in FIG. 3, the frames 2, 2 adjacent to each other having different heights are arranged vertically on the lower side of the lower frame 2. The entire frame member 2b and the end surfaces (cut end surfaces) of the upper and lower horizontal frame members 2a and 2a are in contact with the higher frame member 2, and the upper frame member 2 on the higher side has its vertical side A part of the frame member 2b and the end surface of the lower horizontal frame member 2a are connected in a state of being in contact with the lower frame member 2.

  On the other hand, the portion of the left base unit 1 that is positioned at the upper step of the straight staircase portion S1 has the same frame structure as the portion of the right base unit 1 that is positioned at the upper step of the straight staircase portion S1. Are arranged in series in the order of height so that the plane in each frame 2 is positioned on the same vertical plane extending along the left boundary wall W. Are integrally connected.

  Further, as shown in FIG. 4, the left base unit 1 located in the surrounding staircase portion S <b> 2 has two frames 2, 2 having different heights and a plane in each frame 2 on the rear side. They are arranged in series in order of height so as to be positioned on the same vertical plane extending along the boundary wall W, and are integrally connected by screws or the like. The heights of these two frames 2 and 2 are the two frames of the corresponding steps (10 steps and 11 steps from the bottom) in the right (outside) base unit 1 located in the lower half of the turning step S2. It is the same height as 2 and 2. Of these two frames 2 and 2, the upper surface of the upper frame 2 located on the left side in FIGS. 2 and 4 is on the opposite side of the lower frame 2 (left side in FIG. 4). The receiving member 3 is mounted and fixed in an upright manner, and the height of the upper surface of the receiving member 3 is the uppermost step (12 steps from the bottom) in the right (outside) base unit 1 located in the upper half of the turning step S2. The height of the frame 1 is the same. As shown in FIG. 2, the two frames 2, 2 of the surrounding staircase portion S2 are L-shaped in a plan view perpendicular to the upper frames 2, 2,... Of the straight staircase portion S1. Both are integrally connected by screws or the like via spacers 7 (shown in FIG. 2) which are made of plywood having a predetermined thickness, and the base unit 1 on the left side is connected by such connection. Is formed.

  Each frame 2 of each base unit 1 not only connects the horizontal frame members 2a and 2a and the vertical frame members 2b and 2b in a rectangular frame shape as described above, but also, for example, obliquely attaches to the frame 2 The frame body 2 may be reinforced by adding a reinforcing member that is arranged and connected to the frame members 2a and 2b, and the rigidity of the base unit 1 can be increased by the reinforcement.

  The base units 1 and 1 on both the left and right sides of the staircase R are disposed along the left and right sides or the rear boundary walls W, W,... Of the staircase R, and each base unit 1 is placed on the boundary wall W. It stands on the floor surface F of the staircase R without contact or fixing. 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 (for example, 6 mm).

  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.

  Further, the left and right base units 1, 1 are integrally connected by a temporary fixing member 8 as a connecting member at the front end (lower end). As shown in FIG. 5, the temporary fixing member 8 includes three vertical frame members 8b, 8b,... That extend in the vertical direction between the upper and lower horizontal frame members 8a, 8a extending in the horizontal direction. A rectangular frame is formed by connecting and integrating with screws or the like, and the height of the temporary fixing member 8 is the same as that of the frames 2 and 2 at the front end portions of the left and right base units 1 and 1. Then, the temporary fixing member 8 is disposed between both the frame bodies 2 and 2 at the front end portions of the left and right base units 1 and 1, and both the frame bodies 2 and 2 and the temporary fixing member 8 are connected by screws or the like. By doing so, the right and left base units 1, 1 are integrally connected by the temporary fixing member 8 at the front end. The temporary fixing member 8 is also fixed on the floor surface F with screws or the like in the lower horizontal frame member 8a and is self-supporting on the floor surface F.

  In the upper part of the left and right base units 1, 1, a plurality of tread plate mounting portions 4, 4,... Extending in the horizontal direction and a plurality of kick plate mounting portions 5, 5,. It is formed in a (step shape). That is, in the upper stage portion of the straight staircase portion S1, a tread plate mounting portion 4 is formed on the upper surface of each frame body 2 of each base unit 1, and the lower frame adjacent to the frame body 2 on the front surface of the frame body 2 is formed. A kick plate attaching portion 5 is formed at a step portion between the body 2 and the body 2.

  Further, in the surrounding staircase portion S2, in the base unit 1 on the right side (outside), similarly to the upper step portion of the straight staircase portion S1, a tread plate mounting portion 4 is formed on the upper surface of each frame body 2, A kick plate mounting portion 5 is formed at a step portion between the front surface of the frame body 2 and the lower frame body 2 adjacent to the frame body 2. On the other hand, in the base unit 1 on the left side (inner side), a tread board mounting portion 4 is formed on the upper surface of each frame body 2 and the receiving member 3, and the frame body 2 and the front surface of the receiving member 3 are attached to the frame body 2. A kick plate mounting portion 5 is formed at a step portion between adjacent lower frame bodies 2.

  On the other hand, the lower step portion of the straight staircase portion S1 is composed of a power girder step portion 12, and thus the soundproof staircase S has the force girder step portion 12 disposed at the lower portion. That is, the force girder support member 11 is integrally attached and fixed to the front side (lower side) of the straight staircase portion S <b> 1 in contact with the temporary fixing member 8. The force beam support member 11 constitutes a connecting member in the same manner as the temporary fixing member 8 and extends in the vertical direction between the upper and lower horizontal frame members 11a and 11a extending in the horizontal direction as shown in FIG. The two vertical frame members 11b, 11b at the left and right ends are integrally connected by screws or the like to form a rectangular frame shape. Two supporting vertical frame members 11c and 11c extending in the vertical direction are connected in an overlapped manner between the left and right sides of the upper and lower horizontal frame members 11a and 11a. The height of the power girder support member 11 is lower than the frame bodies 2 and 2 at the front ends of the left and right base units 1 and 1, and the power girder support member 11 has both frames at the front ends of the left and right base units 1 and 1. The two frames 2 and 2 and the temporary fixing member 8 are integrally connected to each other by screws or the like. As a result, the left and right base units 1, 1 are integrally connected by the force beam support member 11 at the front end portion. The force girder support member 11 is also fixed to the floor surface F with screws or the like in the lower horizontal frame member 11a and is self-supporting on the floor surface F.

  The power girder staircase portion 12 includes left and right force girders 13 and 13 extending in parallel to each other so as to incline backward from the floor surface F of the staircase room R to the front surface of the front end portion of the straight staircase portion S1. Both force girders 13 and 13 are the same as each other, and are formed of elongated square members arranged so that the width direction is along the vertical direction, and an upper locking portion 13a cut out in an L shape is formed on the lower surface of the upper end portion. Has been. A floor surface abutting portion 13b is formed at the lower end portion of each force girder 13 by obliquely notching the bottom corner portion, and the front end portion of the floor surface abutting portion 13b is notched in an L shape. A lower locking portion 13c is provided. Each force girder 13 is bridged between the force girder support member 11 and the floor surface F, and the upper locking portion 13a is located above the positions of the two supporting vertical frame members 11c and 11c on the force girder support member 11. The horizontal frame member 11a is placed and engaged and fixed, the floor surface contact portion 13b is in contact with the floor surface F, and the lower locking portion 13c is fixed on the floor surface F. By combining and fixing with screws or the like, the upper ends of the force girders 13 and 13 of the force girder staircase 12 are connected and fixed to the base unit 1 and 1 via the force girder support member 11, while the lower end is It is fixed to the floor surface F of the staircase R.

  A plurality of (six in the illustrated example) tread plate mounting portions 15, 15,... Extending in the front-rear horizontal direction and a plurality of (six in the illustrated example) kick plate mountings extending in the vertical direction. The parts 16, 16,... Are alternately formed in a staircase shape (step shape).

  In the left and right base units 1, 1, the tread plate 21 is bridged and fixed between the tread plate mounting portions 4, 4 corresponding to the left and right, and between the kick plate mounting portions 5 of the same height corresponding to the left and right. , 5, a kick plate 22 is bridged. Also, in the left and right force girders 13 and 13, the tread plate 21 is bridged and fixed between the tread plate mounting portions 15 and 15 corresponding to the left and right, and the kick plate mounting portions corresponding to the left and right are fixed. A kick plate 22 is bridged between 16 and 16. 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. 7, each step board 21 in the upper step portion and the surrounding step portion S <b> 2 of the straight staircase portion S <b> 1 and each step plate 21 in the force girder step portion 12 in the lower step portion of the straight staircase portion S <b> 1 are These are connected and integrated with a kick plate 22 adjacent to the upper side of the tread plate 21 by screws or the like to constitute a tread unit 20 having an L-shaped cross section. 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. 7 shows the step board unit 20 in the upper stage portion of the straight staircase portion S1, and the step board unit 20 in the surrounding staircase portion S2 is only different in the shape of the tread plate 21 although not shown.

  Each step board 21 in the upper stage portion of the straight staircase portion S1 and each step board 21 in the power girder step portion 12 in the lower step portion of the straight staircase portion S1 are rectangular plate materials, and the width thereof is that of the base unit 1 and the force girder 13. The front and rear lengths of the corresponding tread plate mounting portions 4 and 15 are larger by a predetermined dimension. In addition, as shown in FIG. 1, the lower and upper steps (10 steps and 12 steps from the bottom) of the round staircase portion S2 are each a right triangle plate, and the middle step (11 steps) of the step plate 21 is a substantially rhombus shape. This plate material is also larger by a predetermined dimension than the front-rear length of the corresponding tread plate mounting portion 4 of the base unit 1.

  In the surrounding staircase portion S2, the kick plate mounting portion 5 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.

  The tread board unit 20 is fixed to the base units 1, 1 and the force beams 13, 13 with screws or the like from the front side (upper surface side) of the tread board 21. Specifically, in the upper step portion of the straight staircase portion S1 and the surrounding staircase portion S2, the kick plates 22 of the respective tread board units 20 are arranged on the rear surface (rear surface) of the right and left base units 1, 1 with the kick plate mounting portions 5, 5 respectively. In this state, the left and right end portions of the tread plate 21 are fixed to the tread plate mounting portions 4 and 4 of the base units 1 and 1 with screws or the like from the front side. Further, in the power girder staircase portion 12 at the lower step portion of the straight staircase portion S1, the kick plate 22 of each tread plate unit 20 abuts the kick plate mounting portions 16 and 16 of the left and right force girders 13 and 13 on the rear surface (back surface), In this state, the portions near the left and right end portions of the tread plate 21 are fixed to the tread plate mounting portions 15 and 15 of the force beams 13 and 13 with screws or the like from the front side. At this time, as shown in FIG. 3, in the tread unit 20, the front end portion of the tread plate 21 projects 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. It is fixed in the state. Instead of the kick plate 22 of the tread plate unit 20, a plate-like kick plate 22 is bridged between the lowermost kick plate mounting portions 16, 16 in the left and right force girders 13, 13 and is fixed by screws or the like.

  Further, as shown in FIG. 8, 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 39 that is removably 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. 8) that 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 same second concave groove portion 32 at a substantially central position in the width direction are further connected to the front end portion (in FIG. 8) on the other end side in the width direction. A similar third concave groove portion 33 is formed on the entire left side portion 33 in the length direction of the base portion 29. On both the front and rear sides of each opening portion of the first to third groove portions 31 to 33, plate-like protrusion portions 35 and 35 that protrude toward the center of the opening portion are the entire lengthwise direction of the groove portions 31 to 33, respectively. The first to third recessed groove portions 31 to 33 are formed so that the groove width of the opening portion is in the groove depth direction. It is narrower than the middle part and is formed in a groove that extends in the middle. The only difference between the first and third concave grooves 31 and 33 on both sides and the central second concave groove 32 is the groove width including the opening, and the other parts are the same, and are located in the front and rear. While the first and third groove portions 31 and 33 have the same groove width, the groove width of the second concave groove portion 32 at the front and rear center is larger than that of the first and third concave groove portions 31 and 33. Note that the third recessed groove portion 33 is not involved in the assembly of the cover portion 39.

  The cover portion 39 is also made of an extruded material of resin. The cover portion 39 is made of a soft resin such as TPE (for example, TPO, TPU) in addition to a PVC resin, for example. The cover portion 39 made of a soft resin is, for example, a PVC base material and has been subjected to an annealing process. In order to suppress expansion and contraction due to temperature, the cover section 39 is forcibly contracted by a heat treatment after extrusion. As the soft resin cover portion 39, a soft material having a hardness of less than 100 degrees is suitably used as a soft material as a raw material for extrusion molding, for example, a cover material of 85 degrees is used.

  The cover portion 39 has a flat mounting portion 40 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 40. It has a flat front part 41 that is continuously formed integrally and extends downward in a direction orthogonal to the mounting part 40, and the cover part 39 has a substantially L-shaped cross section by the front part 41 and the mounting part 40. Has been. A double-sided tape (not shown) is attached to the upper and lower middle portions of the back surface of the front surface portion 41, the nose member 28 is attached to the tread plate 5, and the base portion 29 is the front end of the upper surface of the tread plate 5. In the assembled state in which the cover portion 39 is assembled to the base portion 29 by fitting with the groove portions 31 and 32 of the ridge portions 47 and 49 described later, the front surface portion 41 of the cover portion 39 is attached to the tread plate 5. The front end surface of the tread base material 6 is covered, and the front portion 41 is fixed to the front end surface of the tread base material 6 with a double-sided tape in that state.

  A locking portion 42 extending toward the rear side is integrally formed at the lower end portion of the front surface portion 41. In the free state, the locking portion 42 is inclined rearward and upward toward the rear side, and the nose member 28 is attached to the tread plate 5 as shown in FIG. When the portion 41 covers the front end surface of the tread base material 6 of the tread plate 5, the engaging portion 42 at the lower end thereof is elastically pressed and locked to the lower surface of the tread base material 6.

  Furthermore, a plurality of (three in the illustrated example) anti-slip grooves 44, 44,... Extending in parallel with each other in the length direction are formed on the upper surface of the mounting portion 40 side by side in the width direction. Yes. At the rear end portion (the right end portion in FIG. 8) which is the other end in the width direction of the mounting portion 40, a covering portion 45 whose thickness decreases toward the front end is integrally formed over the entire length direction of the mounting portion 40. Is formed. In the free state where the nosing member 28 is not attached to the step board 5, the covering portion 45 has a tip portion that is curved downward, and as shown in FIG. 8, when the nosing member 28 is attached to the step board 5, The tip is pressed against the upper surface of the surface material 7 of the tread plate 5 by elasticity to cover the front part.

  On the lower surface of the mounting portion 40, a single plate-like first ridge 47 extending in the length direction of the cover portion 39 (mounting portion 40) is provided at the rear end opposite to the front surface portion 41. One second ridge 49 extending in the length direction of the cover portion 39 (mounting portion 40) is integrally formed at a substantially central portion in the width direction so as to protrude downward. 47 and 49 are provided over the entire length of the mounting portion 40.

  The first ridge 47 has a tapering tapered cross section at the tip side, and the thickness in the front-rear direction (left-right direction in FIG. 8) is the opening of the first groove 31 of the base 29. The height of the downward projecting height is set to be smaller than the groove depth of the first concave groove portion 31, and the first ridge portion 47 is formed inside the first concave groove portion 31 of the base portion 29. It is comprised so that it can fit from the opening part.

  Further, a retaining portion 48 having a square cross section is integrally formed at the tip of the first ridge 47, and the sectional shape of the entire first ridge 47 has an arrow shape by the retaining portion 48. There is no. The thickness of the first ridge 47 in the retaining portion 48 is set larger than the groove width of the opening of the first groove 31, and the first ridge 47 is fitted to the first groove 31. When this occurs, the retaining portion 48 is deformed so that the thickness of the first protrusion 47 at the retaining portion 48 is reduced, and the opening of the first groove 31 is submerged and fitted therein. In this fitted state, the retaining portion 48 is caught by the protruding portions 35 on both sides of the opening portion of the first concave groove portion 31, thereby preventing the first convex strip portion 47 from coming out of the first concave groove portion 31. I am doing so.

  On the other hand, unlike the first ridge 47, the second ridge 49 is thicker than the thickness of the first ridge 47 (dimension in the front-rear direction) and lower than the protruding height of the first ridge 47. It has a rectangular cross-section and has a large cross-sectional area and a low protruding height as compared with the first ridge 47. The thickness of the second ridge 49 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 49 can be fitted into the second concave groove 32 of the base 29 through the opening. And when this 2nd protruding item | line part 49 is fitted to the 2nd recessed groove part 32, the protrusion part 35 of the both sides | surfaces of the thickness direction of the 2nd protruding item | line part 49 and the opening both-sides edge of the 2nd recessed groove part 32 is shown. , 35 are provided with a gap between them.

  In FIG. 8, reference numeral 51 denotes a decorative coating layer integrally formed over the entire outer surfaces of the mounting portion 40, the front surface portion 41, the covering portion 45, and the locking portion 42 of the cover portion 39. Is formed by being extruded integrally with the cover portion 39 during extrusion.

  With the above structure, the first and second projecting ridge portions 47 and 49 of the cover portion 39 are fitted into the first and second concave groove portions 31 and 32 of the base portion 29, respectively. It is designed to be removably assembled.

  Further, a surface finishing material 53 having cushioning properties is attached and fixed to the upper surface of the step board 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 53, and the screws and the like for fixing the tread plate unit 20 to the base unit 1 and the power beam 13 from the front side (upper surface side) of the tread plate 21 are concealed. As the surface finishing material 53 having this cushioning property, for example, sheet makeup MDF + PVC mat + nonwoven fabric (or urethane foam) or the like is used.

  Between the left and right base units 1, 1 and the boundary walls W, W,... Of the upper and lower staircase portions S2 of the straight staircase portion S1, the step plates 21 and the kick plates 22 of the respective step plate units 20 are provided. .. Between the left and right end portions and the boundary walls W, W,... And the left and right end portions of the step plates 21 and the kick plates 22 and the boundary walls W, A gap is formed between each of the boundary walls W,..., But a baseboard (not shown) for concealing the gap when viewed from above (external) is provided on each boundary wall W. In addition, it is fixedly attached to the tread plate 21 and the kick plate 22 of each tread unit 20 in a non-contact state.

  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 upper and lower ground units 1 and 1 of the straight staircase portion S1 and the surrounding staircase portion S2 are assembled. Since the base unit 1, 1 is composed of a plurality of frame bodies 2, 2,... Having different heights, the frame bodies 2, 2,. And base unit 1, 1 which has step-like tread board attaching part 4, 4, ... and kick board attaching part 5, 5, ... in the upper part is formed.

  Next, the left and right base units 1, 1 assembled in this way are arranged in the staircase R, the base units 1, 1 are placed on the floor surface F of the staircase R, and the lower ends are screws or the like with the horizontal frame member 2 a. , And is self-supporting in a state where there are gaps between the walls W, W,.

  At that time, the corners and intermediate portions of the side surfaces on the boundary wall W side of each frame 2 in each base unit 1 (the left side of the frame 2 in the left base unit 1 and the right side of the frame 2 in the right base unit 1) A gap adjusting material (not shown) with a certain thickness is attached to the base unit 1 and the base unit 1 is erected so that the gap adjusting material contacts the 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, and the base unit 1 does not come into contact with the boundary wall W in a self-supporting state. If a material having a high damping effect such as a system, PVC system, asphalt system, or foamed urethane system is used, it may be left as it is without being removed. That is, for example, when the base unit 1 is fixed to the field wall W with a screw or the like, the vibration of the base unit 1 (step S) is transmitted to the field wall W through the screw or the like. This is because if the gap adjusting material having a high vibration 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.

  Then, the left and right base units 1 and 1 are integrally connected by a temporary fixing member 8 at the front end portion (lower end portion) thereof. Specifically, the temporary fixing member 8 is disposed between the left and right base units 1 and 1 and both front and rear frame bodies 2 and 2, and both the frame bodies 2 and 2 and the temporary fixing member 8 are connected with screws or the like. At the same time, the temporary fixing member 8 is also fixed to the floor surface F with screws or the like in the lower lateral frame member 8a. As a result, the right and left base units 1 and 1 are integrally connected by the temporary fixing member 8 at the front end portion, and the base units 1 and 1 can be prevented from tilting in the left and right direction.

  Thereafter, a force girder support member 11 is arranged at the front ends of the left and right base units 1, 1, and the force girder support member 11 is attached to the front surfaces of both frames 2, 2 of the left and right base units 1, 1 with screws or the like They are integrally connected and fixed to the floor surface F with the lower lateral frame member 11a.

  Next, the left and right force girders 13 and 13 are obliquely bridged between the upper horizontal frame member 11a at the upper end of the force girder support member 11 and the floor surface F, and the upper locking portion 13a of each force girder 13 is supported by the power girder. The member 11 is placed and engaged with and fixed to the upper horizontal frame member 11a at the position of the two supporting vertical frame members 11c and 11c, and the floor surface contact portion 13b is brought into contact with the floor surface F, thereby lowering the lower side member. The stopper 13c is engaged with the locking bar 25 on the floor F and fixed with screws or the like. Thus, the upper ends of the force girders 13 and 13 are connected and fixed to the base units 1 and 1 via the force girder support member 11, and the lower ends are fixed to the floor surface F of the staircase R.

  In parallel with the construction of the base units 1, 1 and the power girders 13, 13, the cross-section L is obtained by integrating the tread plates 21 and the kick plates 22 adjacent to the lower side of the tread plates 21 in advance by coupling. A plurality of character-shaped tread board units 20, 20,... Are formed.

  First, a single kick plate 22 is bridged over the lowermost kick plate mounting portions 16 and 16 of the left and right force beams 13 and 13 of the power girder staircase portion 12 and fixed with screws, and then each tread board unit 20 is fixed. Work in order from the bottom of the staircase S to the top. That is, the tread board unit 20 is arranged on the tread board mounting portions 15 and 15 and the kick board mounting sections 16 and 16 in the second stage from the bottom of the left and right force girders 13 and 13, and the kick board 22 of the tread board unit 20 is arranged on the rear surface (rear surface). ), The tread plate 21 is fixed from the front side (upper surface side) to the tread plate mounting portions 15, 15 of the force girders 13, 13 with screws or the like. Thereafter, in the same manner, the tread board unit 20 is attached and fixed in order up to the upper ends of the force beams 13 and 13. At that time, the lowermost kick plate 22, and the tread plate 21 and the kick plate 22 of the tread unit 20 are all attached with their left and right ends spaced apart from the boundary walls W and W.

  After the tread board units 20, 20,... Are attached to the force beams 13, 13, in this way, the bottom tread attachment parts 4, 4 and the kick board attachment parts 5, 5 of the left and right base units 1, 1 are now mounted. The tread board unit 20 is arranged, and the tread board 21 is also moved from the front side (upper surface side) to the tread board mounting part 4 in a state where the kick board 22 of the tread board unit 20 is in contact with the kick board mounting parts 5 and 5 on the rear surface (back surface). , 4 fixed with screws. Thereafter, in the same manner, the tread board units 20, 20,... Are attached and fixed in order up to the step S2 around the upper end 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. At the same time, a surface finishing material 53 having cushioning properties is fixed to the upper surface of the tread plate 21 on the rear side (back side) of the nose member 28, and then the cover part 39 is attached to the base part 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 left and right ground units 1 and 1 have the lower ends of the staircase R in the upper staircase S1 and the surrounding staircase S2 of the staircase S constructed in the staircase R. The base unit 1 is not fixed to the wall W, but a gap is left between them, and the tread plate mounting portions 4 and 4 of the left and right base units 1 and 1 are provided. The tread plate 21 is bridged between and fixed, and the kick plate 22 is bridged between the kick plate mounting portions 5 and 5, and between the left and right ends of each tread plate 21 and each kick plate 22 and the boundary walls W, W. A gap is also formed. Further, a tread plate 21 is bridged and fixed between tread plate mounting portions 15 and 15 of the left and right force beams 13 and 13 of the power girder step portion 12 in the lower step portion of the straight stair portion S1, and the kick plate mounting portions 15 and 15 are fixed. The kick plates 22 are bridged between them, and gaps are also formed between the left and right ends of the respective tread plates 21 and the respective kick plates 22 and the field walls W, W. Therefore, the staircase S including the left and right base units 1, 1, the tread board 21 and the kick board 22 is fixedly supported on the floor surface F of the staircase R and is completely 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 completely 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 53 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, the upper surface of each tread plate 21 is covered with the surface finishing material 53 fixed to the upper surface in this way, so that the tread unit 20 is fixed to the base unit 1 and the force beam 13 with screws or the like from the front side (upper surface side) on the tread plate 21. Even if it does it, the screw | thread etc. can be concealed by the surface finishing material 53, a screw | thread etc. are not exposed to each tread 21 upper surface, but the aesthetics of the staircase S are maintained.

  In addition, the tread plate mounting portions 4, 4,... And the kick plate mounting portions 5, 5,... Are formed in a staircase pattern on the base unit 1, 1, and the tread plate 21 is mounted and fixed on these tread plate mounting portions 4. Since the kick plate 22 is disposed in the portion 5, it is not necessary to separately fix the doll stage or the side plate to the boundary walls W, W, and the stairs S can be easily constructed accordingly.

  Furthermore, since the left and right ground units 1 and 1 are connected by a tread 21 spanned between them, the rigidity of the staircase S can be ensured.

  Further, the base units 1 and 1 of the upper staircase portion S1 and the surrounding staircase portion S2 have a plurality of rectangular frames 2, 2,... Having different heights on the same plane. Are arranged in series in the order of height so as to be positioned integrally, and are integrally connected to each other, and the tread plate mounting portion 4 is formed on the upper surface of each frame 2, so that a plurality of frames 2, 2 The base unit 1 is constituted by a combination of..., So that the base unit 1 can be easily manufactured and the construction at the construction site is also easy.

  Furthermore, since the left and right base units 1 and 1 are integrally connected by a temporary fixing member 8 and a force girder support member 11 (both connecting members) at the front end portions thereof, the rigidity in the left and right direction of the staircase S is increased. Can be secured. In addition, since the base unit 1 positioned at the upper stage of the straight staircase portion S1 and the base unit 1 positioned at the surrounding staircase portion S2 are orthogonally connected in a plan view, the rigidity of the staircase S is also achieved by this intersecting structure. Is greatly secured.

  The lower step of the straight staircase portion S1 of the staircase S is a power girder staircase portion 12 in which tread plates 21, 21,... And kick plates 22, 22,. Since the upper ends of the force girders 13 and 13 of the power girder staircase portion 12 are connected to the base units 1 and 1, the lower end portion is fixed to the floor surface F of the staircase room R. The upper ends of the left and right force girders 13 and 13 of the power girder staircase 12 are connected to the left and right ground units 1 and 1 in the upper step of the straight staircase S1 of S, and the lower ends of the force girders 13 and 13 are connected to the floor surface F. The staircase S can be constructed simply by fixing it to the wall. Therefore, the workability at the time of construction of the stairs S can be improved as compared with the stairs S having the base units 1 and 1 as a whole.

  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 the units 1 and 1 and the power girders 13 and 13 are fixed, the tread board unit 20 and the power girders 13 and 13 are fixed to the base unit 1 and 1 and the power girders 13 and 13 at the same time. Can do. 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.

( Reference form )
9 and 10 show a reference form (the same parts as those in FIGS. 1 to 8 are denoted by the same reference numerals and detailed description thereof is omitted), and the straight staircase portion S1 and the surrounding staircase portion S2 of the staircase S. Are all provided with the base units 1 and 1.

That is, in this reference embodiment, unlike the exemplary shaped on purpose, Chikaraketa stepped portion 11 and the Chikaraketa support member 11 is not provided in the lower portion of the straight stepped portion S1, the lower portion of the straight stepped portion S1 is Base units 1 and 1 having a frame structure are provided so as to continue from the upper stage. The base unit 1, 1 in the lower step portion of the straight staircase portion S1, like the upper step portion, a plurality of (six in the illustrated example) rectangular frame bodies 2, 2,. A plurality of frames 2, 2,... Are different from each other. Such framework are the on purpose similar implementation the detailed description thereof is omitted.

Also, other configurations are exemplary forms on purpose the same, therefore, it is possible to achieve this reference embodiment also in form on purpose same effect.

(Other embodiments)
In the implementation form and reference embodiment, it constitutes a step board unit 20 by integrating the tread plate 21 and the riser plate 22, although the treadle unit 20 to fix by treadle treadle without providing the step board unit 20 It is also possible to attach and fix the 21 and the kick plate 22 independently to the base plate units 1 and 1 and the tread plate mounting portion and the kick plate mounting portion of the force beams 13 and 13, respectively. However, it is preferable to provide the tread unit 20 in terms of improving workability.

Further, the upper you facilities embodiment and reference embodiment, stair S is being combined with straight stair portion S1 and the around stepped portion S2, be applied to even present invention a staircase straight staircase portion S1 only it can. 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.

  The present invention is extremely useful because it can ensure sufficient soundproof performance by reducing noise and vibration during use of the stairs constructed in the staircase to the living room through the wall as much as possible. High availability on.

S Soundproof staircase R Staircase W World wall F Floor 1 Base unit 2 Frame 4 Tread plate mounting portion 5 Kick plate mounting portion 8 Temporary fixing member (connection member)
11 Force girder support member (connection member)
12 force girder step 13 force girder 15 tread plate mounting portion 16 kick plate mounting portion 20 tread unit 21 tread plate 22 kick plate 28 nose member 53 surface finishing material

Claims (7)

Provided stairwell in a building, a soundproof stairs that have a and a lower portion connected to the upper part and the upper step portion,
The upper stage includes left and right base units provided along the left and right boundary walls of the staircase on the left and right sides of the staircase ,
Each of the base units is provided in a rectangular frame shape by connecting and integrating square members, and a plurality of rectangular frame bodies having different heights from the floor surface are the same planes that pass through the frame body. It has a framework structure that is positioned above and is connected in series in the order of height,
Each of the base units is not connected to the left and right boundary walls of the staircase, and the lower end is fixed to the floor surface of the staircase. 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 ,
The lower step part is composed of a power girder staircase part in which a step board and a kick board are bridged between left and right force girders,
The soundproof staircase according to claim 1, wherein an upper end portion of the force girder of the power girder step portion is connected to a base unit of the upper step portion, and a lower end portion is fixed to a floor surface of the staircase. In claim 1,
A soundproof staircase characterized in that the distance between the left and right force girders in the power girder staircase is narrower than the distance between the left and right ground units in the upper stage . In claim 1 or 2,
The soundproof staircase, wherein the left and right base units are integrally connected by a connecting member. In claim 3,
A soundproof staircase characterized in that the connecting member is self-supporting on the floor surface of the staircase. 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. A construction method for the soundproof stairs according to claim 1,
The left and right ground units of the upper stage on the floor surface of the staircase are made to stand independently with the lower end fixed to the floor surface and a gap from the wall of the staircase.
The left and right base units are connected together by connecting members that stand on the floor of the staircase,
Bridge the left and right force beams between the connecting member and the floor,
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 ground unit and the power girder from the front side of the tread board in a state where the tread board and the kick board are spaced from the boundary wall of the staircase, so that the force between the left and right base unit mounting parts and the left and right force treadle and also construction methods soundproof staircase, characterized in that to pass bridged between riser plate mounting portion and the left and right between the force digits the riser plate respectively between digits.

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