JP6947496B2 - Stair damping metal fittings and stair damping structure - Google Patents

Description

The present invention relates to a staircase vibration damping metal fitting and a staircase vibration damping structure.

Conventionally, when installing a staircase, a staircase structure is known in which a girder supporting a tread plate is directly fixed to a wall of a building structure standing on the side of the staircase (see, for example, Patent Document 1). Further, a staircase structure in which the side surface of the girder and the pillar of the building structure are connected via a bracket is also known (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2016-89415 Japanese Unexamined Patent Publication No. 2001-65134

However, in the case of connecting the middle position of the girder to the building structure by using the staircase structure in which the girder is directly fixed to the wall of the building structure on the side of the stairs as in the technique of Patent Document 1, the girder and the building structure There is a problem that it cannot be applied to a force girder that has a gap between it and.
On the other hand, the technique of Patent Document 2 can be applied even to a force girder in which a gap is generated between the girder and the building structure, and the bracket described in Patent Document 2 is used to set the intermediate position of the girder to the building structure. Can be connected to the body. However, in the bracket described in Patent Document 2, a cushioning material (a cushioning material) in which rolling (horizontal vibration) that occurs when going up and down stairs is sandwiched between a first bracket fixed to a girder and a second bracket fixed to a pillar. It is configured to absorb by deformation of the anti-vibration material). Therefore, although it is possible to prevent vibration transmission from the stairs to the building structure, there is a problem that the stairs themselves sway when going up and down the stairs.

An object of the present invention is to provide a staircase vibration damping metal fitting and a staircase vibration damping structure capable of suppressing the rolling of a staircase that occurs when going up and down the stairs.

The stair vibration damping metal fitting of the present invention has a first joint that is fixed to the side surface of a girder that supports the tread plate of the stairs, a second joint that is fixed to a building structure that exists on the side of the stairs, and a first joint. It is provided with a strip connecting the second joint and the second joint.

The first joint portion has a first joint surface facing the side surface of the girder, the second joint portion has a second joint surface facing the building structure, and the first joint surface and the second joint portion are opposed to each other. It may be parallel to the surface.
Further, the fixed position of the first joint portion with respect to the girder and the fixed position of the second joint portion with respect to the building structure may be deviated in the extending direction of the girder in a plan view.
Further, the fixed position of the first joint portion with respect to the girder and the fixed position of the second joint portion with respect to the building structure may coincide with the extending direction of the tread plate in a plan view.
Further, it is preferable that the vibration isolator is provided on at least one of the first joint surface facing the girder of the first joint portion and the second joint surface facing the building structure of the second joint portion.
Further, the first joint portion, the second joint portion, and the strip plate may be formed in a three-layer structure in which both sides of the anti-vibration material are sandwiched by a pair of plate materials.

In the stair vibration damping structure of the present invention, the first joint of the stair damping metal fitting is fixed to the side surface of the girder supporting the tread plate of the stair, and the second joint of the stair vibration damping metal fitting exists on the side of the stair. It is connected to the building structure.

Further, it is preferable that the building structure is a building unit having a pillar material, and the second joint portion of the stair vibration damping metal fitting is fixed to the pillar material.
Further, the building structure may be a building unit having an outer wall material, and the second joint portion of the stair vibration damping metal fitting may be fixed to the outer wall material.

Further, in the stair damping structure of the present invention, the fixed position of the first joint with respect to the girder and the fixed position of the second joint with respect to the building structure of the stair damping metal fitting are in the extending direction of the girder in a plan view. The second system in which the displaced first damping metal fitting, the fixed position of the first joint with respect to the girder, and the fixed position of the second joint with respect to the building structure coincide with the extension direction of the tread plate in a plan view. The first joint of the first and second vibration damping metal fittings is fixed to the side surface of the girder, and the second joint of the first and second vibration damping metal fittings is fixed to the building structure. You may.

Then, the building structure is a building unit having a pillar material, and at least one of the second joint portion of the first vibration damping metal fitting and the second joint portion of the second vibration damping metal fitting is fixed to the same pillar material of the building unit. It may have been done.
Further, the building structure is a building unit having an outer wall material, and at least one of the second joint portion of the first vibration damping metal fitting and the second joint portion of the second vibration damping metal fitting may be fixed to the outer wall material. ..

Therefore, the stair damping metal fitting of the present invention can be applied even when the gap between the stair girder and the building structure is wide, and the side surface of the stair girder without interposing a vibration isolator. It can be connected to a building structure. Therefore, it is possible to suppress the bending of the girder in the lateral direction of the stairs and to suppress the rolling of the stairs that occurs when going up and down the stairs.

Further, the stair damping metal fitting in which the first joint surface and the second joint surface are parallel can be reliably attached to the stairs arranged parallel to the building structure.
Further, in the stair vibration damping metal fitting in which the fixed position of the first joint portion and the fixed position of the second joint portion are deviated in the extending direction of the girder in a plan view, the strip plate is provided against the vibration acting in the extending direction of the girder. It is possible to make it difficult to deform, and it is possible to efficiently suppress rolling in the stretching direction of the girder and the width direction of the stairs.
Further, the fixed position of the first joint portion and the fixed position of the second joint portion coincide with the extending direction of the tread plate in a plan view, and the first joint portion and the second joint portion are connected by a pair of parallel strips. With the staircase vibration damping metal fittings, the strip plate can be made less likely to be deformed by the vibration acting in the extending direction of the tread plate, and the rolling motion in the width direction of the staircase can be suppressed.
Further, in the stair vibration damping metal fitting in which the vibration damping material is provided on at least one of the first joint surface and the second joint surface, the vibration input from the stairs to the building structure can be absorbed by the vibration damping material, and the building structure can be absorbed. Vibration transmission from the stairs to the building can be suppressed.
Further, in the case where the first joint portion, the second joint portion, and the strip plate are formed in a three-layer structure in which both sides of the anti-vibration material are sandwiched by a pair of plate materials, the input is input to the building structure from the stairs. The vibration can be absorbed by the vibration isolator, and the vibration transmission from the stairs to the building structure can be suppressed.

Further, in the staircase vibration damping structure of the present invention, the side surface of the staircase girder is connected to the building structure by the staircase vibration damping metal fitting, and the staircase girder is supported from the side by the building structure via the staircase vibration damping metal fitting. be able to. Therefore, it is possible to suppress the rolling of the stairs that occurs when going up and down the stairs.

Further, in a building unit in which the building structure adjacent to the stairs has a pillar material and the second joint portion of the stair vibration damping metal fitting is fixed to the pillar material, the stair vibration damping metal fitting is used. The vibration transmitted from the stairs can be supported by the pillar material, and the effect of suppressing the rolling of the stairs can be improved.
Further, in a building unit in which the building structure adjacent to the stairs has an outer wall material and the second joint portion of the stair vibration damping metal fitting is fixed to the outer wall material, the stair vibration damping metal fitting is used. The vibration transmitted from the stairs can be supported by the outer wall material, and the effect of suppressing the rolling of the stairs can be improved.

Further, the first vibration damping metal fitting in which the first joint portion and the second joint portion are displaced in the extending direction of the girder in the plan view, and the first joint portion and the second joint portion are in the extending direction of the tread plate in the plan view. In the stairs damping structure using the matching second damping metal fitting and the stair damping metal fitting, the first vibration damping metal fitting mainly receives the vibration acting in the extending direction of the girder and acts in the extending direction of the tread plate. Vibration can be mainly received by the second damping metal fitting. Therefore, the deformation resistance of the first and second vibration damping metal fittings can effectively suppress the rolling of the stairs in various directions that occurs when going up and down the stairs.

Further, in the staircase vibration damping structure in which the building structure adjacent to the stairs is a building unit having a pillar material and the second joints of the first and second vibration damping metal fittings are fixed to the same pillar material, the first The vibration transmitted from the stairs via the first and second vibration damping metal fittings can be received at a close position, and the effect of suppressing the rolling of the stairs can be improved.
Moreover, in the staircase vibration damping structure in which the building structure adjacent to the stairs is a building unit having an outer wall material and the second joints of the first and second vibration damping metal fittings are fixed to the outer wall material, the first and second vibration damping structures are used. The outer wall material can receive the vibration transmitted from the stairs via the second damping metal fitting.

It is a top view of the unit building to which the stair vibration damping structure of Example 1 was applied. It is a partially disassembled perspective view which shows the stairs of Example 1. FIG. It is a side view which shows the stairs to which the stair vibration damping structure of Example 1 was applied. It is a top view which shows the stairs vibration damping structure of Example 1. FIG. It is a perspective view which shows the 1st vibration damping metal fitting of Example 1. FIG. It is a side view which shows the 1st vibration damping metal fitting of Example 1. FIG. FIG. 4B is a cross-sectional view taken along the line AA in FIG. 4B. It is a perspective view which shows the 2nd vibration damping metal fitting of Example 1. FIG. It is a side view which shows the 2nd vibration damping metal fitting of Example 1. FIG. It is a perspective view which shows the mounting structure of the stairs vibration damping metal fitting of Example 1. FIG. It is a perspective view which shows the mounting structure of the stairs vibration damping column of Example 1. FIG. It is a side view which shows the lower end part of the pillar part of the stair vibration damping column of Example 1. FIG. It is a perspective view which shows the support metal fitting of the stairs vibration damping column of Example 1. FIG. It is a side view which shows the upper end part and the vibration-damping part of the pillar part of the stairs vibration damping column of Example 1. FIG. 9A is a cross-sectional view taken along the line BB in FIG. 9A. It is a perspective view which shows the deformability of the stairs vibration damping metal fitting of Example 1. FIG.

Hereinafter, a mode for carrying out the staircase vibration damping metal fitting and the staircase vibration damping structure of the present invention will be described with reference to the first embodiment shown in the drawings.

(Example 1)
First, the configurations of the staircase vibration damping metal fittings and the staircase vibration damping structure of the first embodiment will be described separately for "overall configuration", "detailed configuration of the staircase vibration damping metal fittings", and "detailed configuration of the staircase vibration damping columns".

[overall structure]
FIG. 1 is a schematic plan view of a unit building to which the stair vibration damping structure of the first embodiment is applied, FIG. 2A is a perspective view showing the stairs of the first embodiment, and FIG. 2B is a perspective view of the first embodiment. It is a side view of the stairs provided with the stairs vibration damping structure. Hereinafter, the overall configuration of the first embodiment will be described with reference to FIGS. 1 to 2B.

The staircase damping metal fitting and the staircase damping structure of the first embodiment are applied to the unit building 1 shown in FIG. Here, the unit building 1 is a two-story building, and a plurality of lower-floor building units 2, ... Are installed on the foundation to form a first-floor portion, and a plurality of lower-floor building units 2, ... An upper floor building unit (not shown) is placed, and a roof is formed on the upper floor building unit by a roof unit (not shown).

Both the lower floor building unit 2 and the upper floor building unit are factory-produced and have a reinforcing bar-based assembly structure assembled in a box shape by columns and beams. Each building unit may be a wall-type construction method in which a wall panel is erected on the periphery of the floor material and assembled in a box shape.

Then, as shown in FIG. 1, the unit building 1 has a stairwell space at a position surrounded by a plurality of building units, and the staircase unit 3 having a staircase 10 connecting the first floor and the second floor is provided in the stairwell space. Has been done.

The staircase 10 is provided as an inner staircase of the staircase unit 3, and as shown in FIG. 2A, a pair of left and right force girders 11, 11 (girders) formed of channel steel having a U-shaped cross section and a force. It is provided with a plurality of steps of treads 12, ... Overlaid on the girders 11,11, and the plurality of treads 12, ... Are supported by a pair of force girders 11,11.

Here, as shown in FIG. 2B, the lower end portion 11α of the force girder 11 is bolted to the metal fitting 3b attached to the floor beam 3a (beam material) of the staircase unit 3, and the upper end portion 11β of the staircase unit 3 is fixed to the metal fitting 3b. It is bolted to the ceiling beam 3c. That is, in the force girder 11, the upper and lower end portions 11α and 11β are supported by the skeleton structure of the staircase unit 3, respectively.

The tread plate 12 is fixed to the force girders 11 and 11 via the tread plate joining metal fitting 13 and the tread plate receiving metal fitting 14 (see FIG. 2A). The tread plate 12 is formed of, for example, a plastic recycled composite material, and has a structure having strength such as a honeycomb structure. The tread plate 12 is formed into an L-shaped cross-sectional shape by a tread portion 12a that is rectangular in a plan view and extends in the horizontal direction, and a hanging flange portion 12b that hangs down from the nose portion on the front side of the tread portion 12a. Has been done.

The tread plate joint fitting 13 is formed of a metal steel plate in which the upper and lower ends are bent in opposite directions in the horizontal direction and the vertical cross section in the vertical direction is formed in a substantially Z shape. The lower plate 13a of the tread plate joint fitting 13 is bolted to the upper flange 11b of the force girder 11. Further, the tread plate 12 is fixed to the tread plate joint fitting 13 by fastening a plurality of tapping screws 15 which are inserted from below the upper plate 13b and penetrate the tread plate receiving metal fitting 14 to the back surface of the tread plate 12.

The tread plate receiving metal fittings 14 are bridged between a pair of left and right tread plate joining metal fittings 13 and 13 fixed to the left and right force girders 11 and 11, respectively, and receive an input load to the tread plate 12. The tread plate receiving metal fitting 14 is a metal steel plate formed in a substantially inverted U-shaped cross section by a base plate portion 14a, a stepping-out prevention portion 14b, and a back flange portion 14c.

The base plate portion 14a is formed in a substantially rectangular planar shape, and the entire surface thereof is joined to the back surface of the tread portion 12a of the tread plate 12 via an ultra-high molecular weight polyethylene sheet (not shown). The step-through prevention portion 14b protrudes downward from the end of the base plate portion 14a on the nose side, and the lower end portion thereof is behind the base plate portion 14a so as not to be caught when the toes hit the base plate portion 14a. It is bent toward the side. Further, the back-side flange portion 14c projects downward from the back-side end of the base plate portion 14a, and is formed to have a dimension shorter than the vertical dimension of the step-through prevention portion 14b.
The upper plate 13b of the tread plate joining metal fitting 13 is formed to have a size that fits between the step-through prevention portion 14b and the back flange portion 14c.

[Detailed configuration of stair damping bracket]
FIG. 3 is a plan view showing the staircase vibration damping structure of the first embodiment. 4A to 4C show the first vibration damping metal fitting of the first embodiment, and FIGS. 5A and 5B show the second vibration damping metal fitting of the first embodiment. Further, FIG. 6 is a perspective view showing a mounting structure of the staircase vibration damping metal fitting according to the first embodiment. Hereinafter, the detailed configuration of the staircase vibration damping metal fitting of the first embodiment will be described with reference to FIGS. 3 to 6.

As shown in FIG. 3, in the stairs vibration damping structure of the first embodiment, the web 11a (side surface) of the force girder 11 supporting the tread plate 12 of the stairs 10 and the stairs 10 of the plurality of lower floor building units 2, ... The lower floor building unit 4 (building structure existing on the side of the stairs 10) adjacent to the stairs is connected by using the stairs vibration damping metal fitting 20. In the first embodiment, the staircase vibration damping metal fitting 20 has a first vibration damping metal fitting 21 and a second vibration damping metal fitting 22, and is spaced apart from each other along the extending direction S of the force girder 11. Multiple are installed.
Here, the "stretching direction S of the force girder 11" is an inclined direction along the force girder 11.

As shown in FIGS. 4A to 4C and 6, the first vibration damping metal fitting 21 has a first joint portion 21a, a second joint portion 21b, and a strip plate 21c.

The first joint portion 21a is a square-shaped flat steel and is fixed to the web 11a of the force girder 11. Further, the first joint surface 211a of the first joint portion 21a facing the web 11a is covered with the vibration isolator 23 (see FIG. 4C).

The second joint portion 21b is a square-shaped flat steel having the same shape as the first joint portion 21a, and is fixed to the stud 4a of the lower floor building unit 4 (building structure) existing on the side of the stairs 10. .. Further, the second joint surface 211b facing the lower floor building unit 4 of the second joint portion 21b is covered with the vibration isolator 23 (see FIG. 4C).

The "stud 4a" is a pillar material that is erected from the floor girder 4b of the lower floor building unit 4 and supports the outer wall material 4c. The anti-vibration material 23 is a rubber sheet formed of chlorosulfonated polyethylene rubber (CSM).

The strip 21c is a rectangular flat steel, one end in the longitudinal direction is connected to the upper end 212a of the stairs of the first joint 21a, and the other end in the longitudinal direction is below the stairs of the second joint 21b. It is connected to the end 212b. As a result, the first joint portion 21a and the second joint portion 21b are connected by the strip plate 21c.

Then, in the first vibration damping metal fitting 21, the first joint surface 211a and the second joint surface 211b are parallel to each other and are deviated from each other in the extension direction X in the plan view of the force girder 11. As a result, when the first vibration damping metal fitting 21 is fixed to the force girder 11 and the stud 4a, the fixed position of the first joint portion 21a with respect to the force girder 11 and the fixed position of the second joint portion 21b to the stud 4a are flat. When viewed, it shifts in the stretching direction S of the force girder 11. The height positions of the first joint surface 211a and the second joint surface 211b in the vertical direction (positions of the stairs 10 in the height direction Z) are the same.
Here, the "extending direction X of the force girder 11 in a plan view" is a horizontal direction along the extending direction S of the force girder 11 in a plan view.

As shown in FIGS. 5A, 5B and 6, the second vibration damping metal fitting 22 has a first joint portion 22a, a second joint portion 22b, and a pair of strips 22c.

The first joint portion 22a is a square-shaped flat steel and is fixed to the web 11a of the force girder 11. Further, the first joint surface 221a of the first joint portion 22a facing the web 11a is covered with the vibration isolator 23.

The second joint portion 22b is a square-shaped flat steel having the same shape as the first joint portion 22a, and is fixed to the stud 4a of the lower floor building unit 4 (building structure) existing on the side of the stairs 10. .. Further, the second joint surface 221b facing the lower floor building unit 4 of the second joint portion 22b is covered with the vibration isolator 23.

The pair of strips 22c and 22c are rectangular flat steel having the same shape. Then, one end of one strip 22c in the longitudinal direction is connected to the upper end 222a of the first joint 22a, and the other end in the longitudinal direction is connected to the upper end 222b of the second joint 22b. Further, one end of the other strip 22c in the longitudinal direction is connected to the lower end portion 223a of the first joint portion 22a, and the other end in the longitudinal direction is connected to the lower end portion 223b of the second joint portion 22b. As a result, the first joint portion 22a and the second joint portion 22b are connected by a pair of strips 22c and 22c.

The first joint surface 221a and the second joint surface 221b are parallel to each other, and the second vibration damping metal fitting 22 exhibits a rectangular parallelepiped shape that opens in the lateral direction. Further, the first and second joint surfaces 221a and 221b coincide with the stretching direction Y of the tread plate 12 in a plan view. As a result, when the second vibration damping metal fitting 22 is fixed to the force girder 11 and the stud 4a, the fixed position of the first joint portion 22a with respect to the force girder 11 and the fixed position of the second joint portion 22b to the stud 4a are flat. It visually coincides with the extension direction Y of the tread plate 12 (the width direction of the stairs 10), which is the width direction of the stairs 10. The height positions of the first joint surface 221a and the second joint surface 221b in the vertical direction (positions of the stairs 10 in the height direction Z) are the same.
Here, the "stretching direction Y of the tread plate 12" is a horizontal direction orthogonal to the stretching direction X in the plan view of the force girder 11.

Then, as shown in FIG. 6, in each of the first vibration damping metal fitting 21 and the second vibration damping metal fitting 22, the first joint portions 21a and 22a are surrounded by the upper flange 11b and the lower flange 11c of the force girder 11. The first joints 21a and 22a are inserted into the space and are bolted to the web 11a via the vibration damping material 23. Further, the second joint portions 21b and 22b are bolted to the stud 4a via the vibration isolator 23 and the outer wall material 4c in this order.

Here, the first vibration damping metal fitting 21 and the second vibration damping metal fitting 22 are bridged between the force girder 11 and the lower floor building unit 4 after the staircase unit 3 and the lower floor building unit 4 are assembled. Is done.
Therefore, first, in both the first vibration damping metal fitting 21 and the second vibration damping metal fitting 22, the tread plate 12 is in a state where the longitudinal direction of the strips 21c and 22c is substantially along the extension direction X in the plan view of the force girder 11. From below, it is inserted into the space surrounded by the power girder 11, the tread plate 12, and the lower floor building unit 4. At this time, particularly in the first vibration damping metal fitting 21, the first joint portion 21a and the second joint portion 21b are appropriately tilted so as not to interfere with the lower flange 11c of the force girder 11.

When the first vibration damping metal fitting 21 and the second vibration damping metal fitting 22 enter the space surrounded by the force girder 11, the tread plate 12, and the lower floor building unit 4, then the first vibration damping metal fitting 21 and the second vibration damping metal fitting 21 and the second vibration damping metal fitting 22 are entered. The damping metal fitting 22 is rotated along the horizontal direction so that the first joint portions 21a and 22a face the force girder 11 and the second joint portions 21b and 22b face the lower floor building unit 4. Then, when the first joint surfaces 211a and 221a face the force girder 11 and the second joint surfaces 211b and 221b face the outer wall material 4c of the lower floor building unit 4, the first vibration damping metal fittings 21 and the second vibration damping metal fittings 21 and the second vibration damping metal fittings The position of 22 is adjusted, and the second joint portions 21b and 22b are bolted to the same stud 4a standing on the back side of the outer wall material 4c.
As a result, the second joint portion 21b of the first vibration damping metal fitting 21 and the second joint portion 22b of the second vibration damping metal fitting 22 are both fixed to the stud 4a via the outer wall material 4c.

Then, after fixing the second joint portions 21b and 22b, the first joint portions 21a and 22a are bolted to the web 11a of the force girder 11, respectively.
At this time, the first vibration damping metal fitting 21 is arranged below the second vibration damping metal fitting 22.

[Detailed configuration of stair damping columns]
FIG. 7 is an exploded perspective view showing the mounting structure of the stair vibration damping column of the first embodiment. Further, FIG. 8A is a perspective view showing a lower end portion of a pillar portion of the stair vibration damping column of the first embodiment, and FIG. 8B is a perspective view showing a support metal fitting of the stair damping column. 9A and 9B show the upper end portion and the vibration isolation portion of the pillar portion of the stair vibration damping column of the first embodiment. Hereinafter, the detailed configuration of the staircase vibration damping column of the first embodiment will be described with reference to FIGS. 7 to 9B.

As shown in FIG. 2B, in the staircase vibration damping structure of the first embodiment, the position of the intermediate portion in the longitudinal direction of the force girder 11 supporting the tread plate 12 of the staircase 10 is the floor material 3d by the staircase vibration damping column 30 extending in the vertical direction. Is supported by. Here, the stair vibration damping column 30 includes a column portion 31 extending in the vertical direction and a vibration isolating portion 32 provided between the upper end portion 31b of the column portion 31 and the force girder 11. ..

The column portion 31 is formed of a hollow square steel pipe, is arranged below the force girder 11, and overlaps with the lower flange 11c of the force girder 11 in a plan view (see FIG. 3). Further, as shown in FIG. 8A, the pillar portion 31 has a base plate 31c made of flat steel welded and fixed to the tip of the lower end portion 31a. The peripheral edge of the base plate 31c projects in the horizontal direction from the peripheral surface of the pillar 31 to form a flange (see FIG. 7). Then, the base plate 31c is fixed to the support metal fitting 33 attached to the floor beam 3a by the bolt 31d penetrating the floor material 3d.
As a result, the lower end portion 31a of the pillar portion 31 is fixed to the floor material 3d and stands upright in the vertical direction.

Here, the support metal fitting 33 is formed of angle steel (angle) having an L-shaped cross section, and as shown in FIG. 8B, the first piece 33a is welded and fixed to the side surface of the floor beam 3a. Then, the second piece 33b faces the lower surface 3e of the floor material 3d and becomes a support surface extending along the lower surface 3e of the floor material 3d. Then, by screwing the nut N from below the second piece 33b to the bolt 31d penetrating the base plate 31c and the second piece 33b in order, the floor material is placed between the base plate 31c and the second piece 33b of the support metal fitting 33. 3d is sandwiched.

The anti-vibration portion 32 is formed of angle steel (angle) having an L-shaped cross section, and is welded and fixed to the tip of the upper end portion 31b of the column portion 31. The anti-vibration portion 32 is a girder support surface in which the first piece 32a welded to the pillar portion 31 is fixed to the lower flange 11c (bottom surface) of the force girder 11. Further, the second piece 32b of the vibration isolator portion 32 is a second girder support surface that rises vertically from the first piece 32a (girder support surface) and is fixed to the web 11a (side surface) of the force girder 11.
The anti-vibration portion 32 and the force girder 11 are fixed by bolts B and nuts N. Further, the first piece 32a, which is the girder support surface, is enlarged along the stretching direction S of the force girder 11 with respect to the cross-sectional area of the column portion 31.

Further, in the vibration isolator 32, the upper surface 321a of the first piece 32a facing the force girder 11 and the inner side surface 321b of the second piece 32b facing the force girder 11 are covered with the vibration isolator 34, respectively. There is. Here, the anti-vibration material 34 is a rubber sheet formed of chlorosulfonated polyethylene rubber (CSM).

Next, the action will be described.
First, the "stairs vibration generation mechanism" will be explained, and then the actions of Example 1 will be described as "stairs vibration prevention action by stairs vibration damping metal fittings", "stairs vibration prevention action by stairs vibration damping columns", and "metal fittings". The staircase vibration prevention action by both columns will be described separately.

[Stair vibration generation mechanism]
In the stairs 10 of the first embodiment, a pair of force girders 11 and 11 supporting the plurality of tread plates 12 are bridged between the metal fittings 3b attached to the floor beams 3a of the stairs unit 3 and the ceiling beams 3c. ing. That is, in the force girder 11, the upper and lower end portions 11α and 11β are supported by the skeleton structure of the staircase unit 3.

Here, the force girder 11 is a long member made of channel steel having a U-shaped cross section, but is not fixed because the upper and lower end portions 11α and 11β, which are both ends in the longitudinal direction, are fixed, respectively. The intermediate portion in the longitudinal direction tends to bend in the width direction of the stairs 10 (extending direction Y of the tread plate 12) and in the front-rear direction of the stairs 10 (extending direction X in the plan view of the force girder 11).
As a result, when a load is input to the force girder 11 via the tread plate 12 when ascending or descending the stairs, the force girder 11 is used in the width direction of the stairs 10 (extension direction Y of the tread plate 12) and the front-rear direction of the stairs 10 (force girder 11). It bends in the stretching direction X) in the plan view of the stairs 10 and causes the stairs 10 to sway (horizontally sway).

Further, in the force girder 11, the upper end portion 11β, which is the other longitudinal end portion, is fixed at an upper position than the lower end portion 11α, which is one longitudinal end portion, and the longitudinal intermediate portion floats in the air. It is in a state. Therefore, the intermediate portion of the force girder 11 is pulled downward in the vertical direction by its own weight, and easily bends in the height direction Z of the stairs 10.
As a result, when a load is input to the force girder 11 via the tread plate 12 when going up and down the stairs, the force girder 11 bends in the height direction Z of the stairs 10 and causes vertical sway (swing in the vertical direction) of the stairs 10. ..

[Stair vibration prevention action by stair vibration damping metal fittings]
In the staircase vibration damping structure of the first embodiment, the staircase vibration damping metal fitting 20 is arranged between the staircase 10 and the lower floor building unit 4 adjacent to the side of the staircase unit 3 in which the staircase 10 is installed. The web 11a of the force girder 11 and the stud 4a of the lower floor building unit 4 are connected by using the stair vibration damping metal fitting 20.

Here, the staircase vibration damping metal fitting 20 has a first vibration damping metal fitting 21 and a second vibration damping metal fitting 22. Then, the first vibration damping metal fitting 21 has a first joint portion 21a fixed to the web 11a of the force girder 11 and a second joint portion 21b fixed to the stud 4a of the lower floor building unit 4 on the side of the stairs 10. And a strip plate 21c connecting the first joint portion 21a and the second joint portion 21b. Further, the second vibration damping metal fitting 22 is also fixed to the first joint portion 22a fixed to the web 11a of the force girder 11 and the second joint portion 22b fixed to the stud 4a of the lower floor building unit 4 on the side of the stairs 10. And a pair of strips 22c and 22c connecting the first joint portion 22a and the second joint portion 22b.

Therefore, the first and second vibration damping metal fittings 21 and 22, which are the stair vibration damping metal fittings 20, are both stretched between the force girder 11 and the lower floor building unit 4. As a result, when the force girder 11 vibrates in the width direction of the stairs 10 (extension direction Y of the tread plate 12) when going up and down the stairs 10, if the stairs vibration damping metal fitting 20 ( It interferes with the first and second vibration damping metal fittings 21, 22), and the proximity movement of the force girder 11 to the lower floor building unit 4 is prevented.
On the other hand, if the force girder 11 vibrates in the width direction of the stairs 10 (extension direction Y of the tread plate 12) and tries to separate from the lower floor building unit 4, the force girder 11 will be the stair damping metal fittings 20 (first, first). By being connected to the lower floor building unit 4 via the 2 vibration damping metal fittings 21, 22), the force girder 11 is prevented from moving away from the lower floor building unit 4.
Further, if the force girder 11 vibrates in the front-rear direction of the stairs 10 (extension direction X of the force girder 11 in a plan view) and the relative position with the lower floor building unit 4 tries to shift, the force girder 11 becomes the stairs. By being connected to the lower floor building unit 4 via the vibration damping metal fittings 20 (first and second vibration damping metal fittings 21, 22), the displacement of the force girder 11 with respect to the lower floor building unit 4 is prevented.

As a result, the force girder 11 can be prevented from bending in the width direction of the stairs 10 (extending direction Y of the tread plate 12) and the front-rear direction of the stairs 10 (extending direction X of the force girder 11 in a plan view), and the stairs 10 can be prevented from bending. It is possible to suppress the rolling of the stairs 10 that occurs when going up and down.

In the staircase damping metal fittings 20 (first and second vibration damping metal fittings 21, 22) of the first embodiment, the strips 21c and 22c are arranged according to the width of the gap between the force girder 11 and the lower floor building unit 4. By adjusting the length, the power girder 11 and the lower floor building unit 4 can be appropriately connected. That is, the staircase vibration damping metal fitting 20 can be applied even when the gap between the force girder 11 and the lower floor building unit 4 is wide.
Further, in the staircase vibration damping metal fittings 20 (first and second vibration damping metal fittings 21, 22), the first joint portions 21a, 22a and the second joint portions 21b, 22b are stripped without using a vibration damping material. It is connected by 21c and 22c. Therefore, since the structure does not absorb the vibration of the stairs 10 from the force girder 11 in the middle of the lower floor building unit 4, it is possible to prevent the problem that the stairs 10 itself sways when going up and down the stairs.

Moreover, since the longitudinal intermediate portion of the force girder 11 is connected to the lower floor building unit 4 adjacent to the stairs 10 by the stair damping metal fitting 20, the longitudinal intermediate portion of the force girder 11 is connected to the lower floor building unit 4. Will be supported by. Therefore, it is possible to prevent the force girder 11 from bending downward due to the load acting downward in the vertical direction when going up and down the stairs. As a result, the stair vibration damping metal fitting 20 of the first embodiment can suppress not only the rolling motion but also the pitching motion of the staircase 10.

Further, in the first embodiment, in the first vibration damping metal fitting 21, the first joint surface 211a of the first joint portion 21a and the second joint surface 211b of the second joint portion 21b are parallel to each other. Further, also in the second vibration damping metal fitting 22, the first joint surface 221a of the first joint portion 22a and the second joint surface 221b of the second joint portion 22b are parallel to each other.

Therefore, it is easy to install the first and second vibration damping metal fittings 21 and 22 between the stairs 10 arranged parallel to the lower floor building unit 4, and the force girder 11 and the lower floor building unit 4 are surely installed. It can be attached.
Further, the vibration receiving direction of the first joint surface 211a of the first joint portion 21a, the second joint portion 21b, the first joint portions 21a, 22a, and the vibration receiving direction of the second joint portions 21b, 22b coincide with each other, and the force is applied. It is possible to improve the resistance to vibration input from the girder 11 to the stairs vibration damping metal fittings 20 (first and second vibration damping metal fittings 21, 22). Therefore, the deformation of the stairs vibration damping metal fittings 20 (first and second vibration damping metal fittings 21, 22) at the time of vibration input is suppressed, and the rolling suppression effect of the stairs 10 that occurs when the stairs 10 is moved up and down can be improved.

Moreover, in the first vibration damping metal fitting 21 of the stair vibration damping metal fittings 20, the first joint surface 211a and the second joint surface 211b are displaced in the extending direction S of the force girder 11 in a plan view, and the first joint surface is formed. The fixed position of the portion 21a with respect to the force girder 11 and the fixed position of the second joint portion 21b with respect to the stud 4a are deviated from each other in the extending direction S of the force girder 11 in a plan view.

Thereby, after inserting the first vibration damping metal fitting 21 between the force girder 11 installed earlier and the outer wall material 4c, it can be easily attached to the force girder 11 and the lower floor building unit 4.
That is, since the first joint portion 21a and the second joint portion 21b do not face each other, the second joint portion 21b does not get in the way when the first joint portion 21a is bolted. Further, when the second joint portion 21b is bolted, the first joint portion 21a does not get in the way. Thereby, the first vibration damping metal fitting 21 can be easily fixed.

Further, the strip 21c of the first vibration damping metal fitting 21 is attached in a state of being inclined in the extending direction X of the force girder 11 in a plan view with respect to the extending direction Y of the tread plate 12 (the width direction of the stairs 10). As a result, the strip 21c is stretched between the force girder 11 and the lower floor building unit 4, and at the same time, it is less likely to bend and deform with respect to the vibration acting on the extension direction S of the force girder 11. As a result, deformation of the first vibration damping metal fitting 21 at the time of vibration input can be further suppressed. As a result, the rolling suppression effect of the stairs 10 can be further improved.

On the other hand, in the second vibration damping metal fitting 22 of the stair vibration damping metal fittings 20, the first joint surface 221a and the second joint surface 221b coincide with the extension direction Y of the tread plate 12 in a plan view, and the first joint portion 22a The fixed position with respect to the force girder 11 and the fixed position with respect to the stud 4a of the second joint portion 22b coincide with the extending direction Y of the tread plate 12 in a plan view.

As a result, the strip 22c of the second vibration damping metal fitting 22 is attached in a state along the extending direction Y of the tread plate 12. That is, the strip 22c is less likely to bend and deform with respect to the vibration acting in the stretching direction Y of the tread plate 12, and the deformation of the second vibration damping metal fitting 22 at the time of vibration input can be suppressed. As a result, the rolling suppression effect of the stairs 10 can be improved.

Moreover, in the second vibration damping metal fitting 22, the upper and lower end portions 222a, 222b, 223a, 223b of the first and second joint portions 22a, 22b are connected by a pair of strips 22c, 22c and opened in the lateral direction. It is a rectangular parallelepiped. Therefore, the strip 22c can be made less likely to bend, and the effect of suppressing rolling of the stairs 10 can be further improved.

Then, in the stairs damping structure of the first embodiment, the stairs damping metal fitting 20 has the first vibration damping metal fitting 21 which is hard to bend and deform with respect to the vibration acting on the extension direction X in the plan view of the force girder 11, and the tread plate. It is provided with a second vibration damping metal fitting 22 that is less likely to bend and deform with respect to vibration acting in the stretching direction Y of 12.

As a result, the vibration acting on the extension direction S of the force girder 11 can be suppressed by the first vibration damping metal fitting 21, and the vibration acting on the stretching direction Y of the tread plate 12 can be suppressed by the second vibration damping metal fitting 22. It is possible to further improve the effect of suppressing rolling in various directions that occurs during ascending and descending.

In each of the first and second vibration damping metal fittings 21 and 22, the second joints 21b and 22b are fixed to the same stud 4a of the lower floor building unit 4 adjacent to the stairs 10.
Therefore, the vibration of the stairs 10 in different directions is efficiently suppressed by the two metal fittings, the first and second vibration damping metal fittings 21 and 22, which are attached to the adjacent positions, so that the vibration is not amplified. The rolling suppression effect of the stairs 10 can be further enhanced.

Further, in the first embodiment, the second joint portions 21b and 22b are fixed to the stud 4a via the outer wall material 4c supported by the stud 4a. With the outer wall material 4c, the second joint portions 21b and 22b are fixed at locations that are more difficult to deform, and the rolling suppression effect of the stairs 10 can be further improved.

Then, in the first embodiment, in the first vibration damping metal fitting 21, both the first joint surface 211a and the second joint surface 211b are covered with the vibration damping material 23. Further, in the second vibration damping metal fitting 22, both the first joint surface 221a and the second joint surface 221b are covered with the vibration damping material 23.

Therefore, the first and second vibration damping metal fittings 21 and 22 both have the first joint surfaces 211a and 221a facing the web 11a of the force girder 11 and the second joint surfaces 211b facing the lower floor building unit 4. The vibration damping material 23 will be provided on both of the 221b. As a result, the vibration of the stairs 10 can be absorbed by the vibration damping material 23, and the vibration transmitted to the lower floor building unit 4 via the first and second vibration damping metal fittings 21 and 22 which are the stairs damping metal fittings 20. Can be suppressed. As a result, the rolling suppression effect of the stairs 10 can be further improved.

[Stair vibration prevention action by stair vibration damping columns]
In the staircase damping structure of the first embodiment, the staircase damping column 30 is arranged below the force girder 11 of the staircase 10. Then, the lower end portion 31a of the pillar portion 31 of the stair vibration damping column 30 is fixed to the floor material 3d, and the vibration isolation portion 32 provided at the upper end portion 31b of the pillar portion 31 is fixed to the lower flange 11c of the force girder 11. Has been done. Further, the anti-vibration portion 32 has a first piece 32a (girder support surface) that is enlarged along the stretching direction S of the force girder 11 with respect to the cross-sectional area of the pillar portion 31.

Therefore, the load acting on the tread plate 12 when ascending and descending the stairs is transmitted to the force girder 11, and when a load acting downward in the vertical direction acts on the force girder 11, this load is applied to the vibration isolator of the stair vibration damping column 30. It is received by the first piece 32a (girder support surface) of 32. Then, the pillar portion 31 can support the vibration isolator portion 32 from below the force girder 11 along the vertical direction.

As a result, it is possible to prevent the force girder 11 from bending in the height direction Z of the stairs 10, and it is possible to suppress the pitching of the stairs 10 that occurs when the stairs 10 go up and down.

Further, by expanding the first piece 32a, which is the girder support surface, along the stretching direction S of the force girder 11 from the cross-sectional area of the column portion 31, in addition to supporting the bending of the force girder 11 in a wide range, this The first piece 32a can receive a load acting on the stretching direction X of the force girder 11 in a plan view. Therefore, it is possible to suppress the rolling of the force girder 11 in the stretching direction X in the plan view.

In particular, in the first embodiment, since the stair damping column 30 supports substantially the center of the force girder 11 in the longitudinal direction, it is possible to support the position of the force girder 11 that is most likely to bend downward. It is possible to prevent pitching more effectively.

Further, since the stair vibration damping column 30 does not support the load acting on the stairs 10 but prevents the force girder 11 from bending and suppresses vibration, the lower end portion 31a of the column portion 31 The support structure may be simple. As a result, it is possible to obtain an inexpensive structure with reduced cost.

Further, in the first embodiment, the anti-vibration portion 32 has a second piece 32b which is a second girder support surface which rises vertically from the first piece 32a which is a girder support surface and is fixed to the web 11a of the force girder 11. doing.

Therefore, even if the force girder 11 tries to vibrate in the width direction of the stairs 10 (extension direction Y of the tread plate 12) when going up and down the stairs, the second piece 32b interferes with the web 11a, so that the width of the stairs 10 of the force girder 11 Directional vibration is blocked. As a result, it is possible to prevent the force girder 11 from bending in the lateral direction of the stairs 10 (extending direction Y of the tread plate 12), and it is possible to suppress the rolling of the stairs 10 that occurs when the stairs 10 are moved up and down.

Further, in the first embodiment, the upper surface 321a and the inner side surface 321b of the vibration isolator 32 facing the force girder 11 are both covered with the vibration isolator 34. Therefore, the vibration of the stairs 10 can be absorbed by the vibration damping material 34, and the vibration transmitted from the force girder 11 to the stairs damping column 30 can be suppressed. As a result, the vibration suppressing effect of the stairs 10 can be further improved.

Further, in the stair vibration damping structure of the first embodiment, the base plate 31c provided at the lower end portion 31a of the pillar portion 31 of the stair vibration damping column 30 is bolted to the support metal fitting 33 fixed to the floor beam 3a. There is. Then, the floor material 3d is sandwiched between the base plate 31c and the second piece 33b of the support metal fitting 33.

This makes it possible to prevent a gap from being formed between the base plate 31c and the support metal fitting 33. Then, the wobbling of the base plate 31c can be suppressed, the pillar portion 31 can be stably erected, and the pitching suppressing effect of the stairs 10 can be improved.

[Stair vibration prevention action by both metal fittings and columns]
In the staircase vibration damping structure of the first embodiment, the web 11a of the force girder 11 and the stud 4a of the lower floor building unit 4 are connected by the staircase vibration damping metal fitting 20, and the position of the intermediate portion in the longitudinal direction of the force girder 11 is set. It is supported from below in the vertical direction by the stair damping column 30.

Therefore, both the rolling and pitching of the stairs 10 can be suppressed in the walking vibration when going up and down the stairs by the effect of preventing the stairs rolling by the stairs damping metal fitting 20 and the effect of preventing the stairs pitching by the stairs damping column 30. Can be done.

Although the staircase vibration damping metal fittings and the staircase vibration damping structure of the present invention have been described above based on the first embodiment, the specific configuration is not limited to this embodiment, and each claim in the claims is not limited to this embodiment. Design changes and additions are permitted as long as they do not deviate from the gist of the invention.

In the first embodiment, an example in which the staircase vibration damping metal fitting 20 has the first vibration damping metal fitting 21 and the second vibration damping metal fitting 22 is shown, but the present invention is not limited to this. For example, as the staircase vibration damping metal fitting 20, only the first vibration damping metal fitting 21 may be applied, or only the second vibration damping metal fitting 22 may be applied.
That is, the first vibration damping metal fitting 21 and the second vibration damping metal fitting 22 may be used individually or in combination.
Further, since the staircase vibration damping metal fitting 20 may include a first joint portion, a second joint portion, and a strip, for example, it may be an H-shaped steel, an I-shaped steel, or a channel steel having a U-shaped cross section. May be good. Regardless of which steel material is used, the staircase vibration damping metal fitting 20 can be formed by making the flange portion correspond to the first and second joint portions and the web portion corresponding to the strip plate.

Further, in the first embodiment, in the first and second vibration damping metal fittings 21, 22, the first joint surfaces 211a, 221a of the first joint portions 21a, 22a and the second joint surfaces 211b of the second joint portions 21b, 22b. , 221b and 221b are all covered with the vibration damping material 23. However, the present invention is not limited to this, and only one of the first joint surfaces 211a and 221a or the second joint surfaces 211b and 221b may be covered with the vibration isolator 23. Further, it is not necessary to provide the anti-vibration material 23.

Further, as in the staircase vibration damping metal fitting 40 shown in FIG. 10, the first joint portion 41, the second joint portion 42, and the strip 43 are formed of the vibration isolator 45 by a pair of steel plates (plate materials) 44, 44. It may be formed in a three-layer structure in which both sides are sandwiched.
Even in this case, the vibration isolator 45 can absorb the vibration of the stairs 10, and the vibration transmitted to the lower floor building unit 4 via the stair damping metal fittings 40 can be suppressed. As a result, the rolling suppression effect of the stairs 10 can be further improved.

Further, in the first embodiment, the second joints 21b and 22b of the first and second vibration damping metal fittings 21 and 22, which are the stair vibration damping metal fittings 20, are both fixed to the studs 4a of the lower floor building unit 4. An example is shown. However, the present invention is not limited to this, and for example, when the outer wall material 4c supported by the stud 4a has relatively high rigidity such as a structural laminated wood, a wood cement board, or a wall panel whose surface is covered with a steel plate, the first 2 The joint may be fixed to the outer wall material 4c.
In this case, the vibration of the stairs 10 can be supported by the outer wall material 4c of the lower floor building unit 4 via the first and second vibration damping metal fittings 21, 22 to enhance the rolling suppression effect of the stairs 10. Can be done.

Further, in the first embodiment, an example is shown in which the second joint portions 21b and 22b of the first and second vibration damping metal fittings 21 and 22, which are the stair vibration damping metal fittings 20, are fixed to the same stud 4a. However, the second joint portion 21b of the first vibration damping metal fitting 21 and the second joint portion 22b of the second vibration damping metal fitting 22 may be fixed to different studs 4a. Further, one of the second joints 21b and 22b of the first and second vibration damping metal fittings 21 and 22 may be fixed to the stud 4a and the other may be fixed to the outer wall material 4c. That is, the first and second vibration damping metal fittings 21, 22 may be arranged at positions shifted in the extending direction S of the force girder 11.

Further, the staircase 10 shown in the first embodiment is a so-called "force girder staircase" in which the tread plate 12 is supported by the force girder 11, but may be, for example, a "side girder staircase" in which the tread plate is supported by the side girder. It may be a "Sasara girder staircase" in which the treads are supported by the Sasara girder.
That is, if the staircase has a girder that supports the tread plate, the staircase vibration damping metal fitting and the staircase vibration damping structure of the present invention can be applied.

The stair vibration damping metal fitting 20 and the stair vibration damping structure of the first embodiment have been shown as an example applied to the stairs 10 provided as the inner stairs of the stair unit 3, but the present invention is not limited to this. For example, even in the case of an outer staircase installed outside the building, the staircase damping metal fitting 20 and the staircase damping structure of the first embodiment can be applied. Further, the stair vibration damping metal fitting 20 and the stair vibration damping structure of the first embodiment are installed not only in the stairs installed in the unit building such as the stair unit 3, but also in general buildings (wooden buildings, reinforced buildings, etc.). It can also be applied to stairs.
That is, any staircase having a building structure on the side of the girder supporting the tread plate of the staircase can be applied.

1 unit building 2, 4 lower floor building unit 3 stairs unit 10 stairs 11 power girder (girder)
11a Web (side)
11b Upper flange 11c Lower flange 12 Step plate 13 Step plate joint metal fittings 14 Step plate receiving metal fittings 20 Stairs damping metal fittings 21 1st vibration damping metal fittings 21a 1st joint 211a 1st joint surface 21b 2nd joint 211b 2nd joint surface 21c band Plate 22 2nd vibration damping metal fittings 22a 1st joint 221a 1st joint surface 22b 2nd joint 222b 2nd joint surface 22c Band plate 23 Anti-vibration material 30 Stairs damping column 31 Pillar 31a Lower end 31b Upper end 31c Base plate 32 Vibration isolation part 33 Support bracket 34 Vibration isolation material

Claims (10)

A first joint portion that will be fixed to the side surface of the girder for supporting the treads of stairs,
A second joint portion that will be fixed to the building structures present on the side of the stairs,
A strip connecting the first joint and the second joint is provided.
A staircase vibration damping metal fitting characterized in that the first joint portion, the second joint portion, and the strip plate are formed in a three-layer structure in which both sides of a vibration isolator are sandwiched between a pair of plate materials. In the stair vibration damping metal fitting according to claim 1,
The first joint has a first joint surface you face the side surface of the girder,
The second joint has a second joint surface you face the building structure,
A stair vibration damping metal fitting characterized in that the first joint surface and the second joint surface are parallel to each other. In the stair vibration damping metal fitting according to claim 1 or 2.
The fixed position of the first joint with respect to the girder and the fixed position of the second joint with respect to the building structure are displaced in the extending direction of the girder in a plan view when the stairs are viewed from the side. Stairs damping metal fittings that are characterized by being present. A staircase vibration damping structure using the staircase vibration damping metal fitting according to any one of claims 1 to 3.
The first joint of the stair damping metal fitting is fixed to the side surface of the girder supporting the tread plate of the stairs, and the second joint of the stair damping metal fitting is fixed to the building structure existing on the side of the stair. A staircase vibration damping structure that is characterized by being. In the staircase vibration damping structure according to claim 4.
The building structure is a building unit having a pillar material, and is a building unit.
The second joint has a staircase vibration damping structure characterized in that it is fixed to the pillar material. The staircase vibration damping structure according to claim 4.
The building structure is a building unit having an outer wall material.
The second joint has a staircase vibration damping structure characterized in that it is fixed to the outer wall material. Wherein a first joint part that will be fixed to the side surface of the girder for supporting the treads of stairs, and a second joint portion that will be fixed to the building structures present on the side of the stairs, and the first joint portion first It is a staircase vibration damping structure using a staircase vibration damping metal fitting equipped with a strip connecting the two joints.
In the stair damping metal fitting, the fixed position of the first joint with respect to the girder and the fixed position of the second joint with respect to the building structure are the girders in a plan view when the stairs are viewed from the side. The first damping bracket that is offset in the stretching direction,
The fixed position of the first joint with respect to the girder and the fixed position of the second joint with respect to the building structure coincide with the extending direction of the tread plate in a plan view when the stairs are viewed from the side. Has a second damping bracket,
The first joint portion of the first vibration damping metal fitting and the first joint portion of the second vibration damping metal fitting are fixed to the side surface of the girder, respectively, and the second joint portion of the first vibration damping metal fitting and the second damping metal fitting are provided. A staircase vibration damping structure characterized in that the second joints of the vibration fittings are fixed to the building structure, respectively. Wherein a first joint part that will be fixed to the side surface of the girder for supporting the treads of stairs, and a second joint portion that will be fixed to the building structures present on the side of the stairs, and the first joint portion first and a strip that connects the second connecting portion has a first bonding surface of the first joint you face the side surface of the spar, the second joint face the building structure A staircase vibration damping structure using a staircase vibration damping metal fitting having a second joint surface and having the first joint surface and the second joint surface parallel to each other.
In the stair damping metal fitting, the fixed position of the first joint with respect to the girder and the fixed position of the second joint with respect to the building structure are the girders in a plan view when the stairs are viewed from the side. The first damping bracket that is offset in the stretching direction,
The fixed position of the first joint with respect to the girder and the fixed position of the second joint with respect to the building structure coincide with the extending direction of the tread plate in a plan view when the stairs are viewed from the side. Has a second damping bracket,
The first joint portion of the first vibration damping metal fitting and the first joint portion of the second vibration damping metal fitting are fixed to the side surface of the girder, respectively, and the second joint portion of the first vibration damping metal fitting and the second damping metal fitting are provided. A staircase vibration damping structure characterized in that the second joints of the vibration fittings are fixed to the building structure, respectively. In the staircase vibration damping structure according to claim 7 or 8.
The building structure is a building unit having a pillar material, and is a building unit.
A staircase vibration damping structure characterized in that the second joint portion of the first vibration damping metal fitting and the second joint portion of the second vibration damping metal fitting are fixed to the same pillar material. In the staircase vibration damping structure according to claim 7 or 8.
The building structure is a building unit having an outer wall material.
A staircase vibration damping structure characterized in that the second joint portion of the first vibration damping metal fitting and the second joint portion of the second vibration damping metal fitting are fixed to the outer wall material.

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