JP2018048494A - Vibration control structure of staircase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control structure of a staircase that enables stable vibration suppression at low cost and has a superior degree of freedom of design.SOLUTION: The present invention relates to a vibration control structure of a staircase characterized in that: a lower end part 11α of a force beam 11 supporting step boards 12 of the staircase 10 is supported on a floor plate 3d supported by a floor beam; and bundles 50(a), 50(b), and 50(c) are arranged between the floor plate 3d where the lower end part of the force beam 11 is installed and a foundation slab B1, namely, between a floor binder 3a and the foundation slab B1, and between a support member 40 coupling the floor binders 3a, 3a to each other and the foundation slab B1.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a structure for damping a staircase.

  Conventionally, the unit staircase provided in the building unit is known (for example, refer to patent documents 1). In such a unit staircase, it is required to suppress the sound and vibration generated during ascent and descent. In particular, when the unit staircase is provided in a shared outdoor space, the degree of demand for suppressing sound and vibration is high.

Therefore, various techniques for suppressing the sound and vibration of the unit staircase have been proposed, and a technique in which a vibration absorbing device for suppressing vibration is interposed between the unit staircase and the structure of the building unit has been proposed (for example, , See Patent Document 2).
Or the technique which improves the support rigidity of the girder which supports a tread is also proposed as a technique which suppresses the vibration of a unit step (for example, refer patent document 3).

JP 2004-190303 A JP 2006-152621 A JP-A 63-297660

However, in the structure in which the vibration absorbing device is provided between the staircase and the structure of the building unit as in the technique of Patent Document 2, the vibration absorbing device is necessary, which increases the manufacturing cost, and the elasticity that absorbs vibration. There is also a possibility that the body or the like deteriorates with time and the vibration absorption performance is lowered.
Moreover, in the technique of patent document 3, it is a structure which supports the lower end part of a girder directly to a foundation by penetrating a building unit, and the bolt which directly supports the lower end part of the girder of a staircase by a foundation, or the bolt which penetrates a pillar In addition, dedicated parts such as a backing plate are required, resulting in an increase in cost. Furthermore, the position which supports the lower end part of the stairs girder is limited to the position of the foundation, and the degree of freedom of installation of the stairs is low.

  An object of the present disclosure is to provide a vibration control structure for a staircase that enables stable vibration suppression at low cost and has excellent design flexibility.

  The staircase damping structure of the present disclosure is a staircase damping structure in which a floor plate supported by a floor beam supports a lower end portion of a staircase girder that supports a stepboard of a staircase, and the lower end portion of the staircase girder is A bundle is provided between the floor board to be installed and the foundation slab.

A plurality of floor beams may be bridged between the floor beams of the floor beam, and the bundle may be a staircase damping structure provided between the floor beam and the foundation slab.
Further, the lower end of the stair girder is disposed between the floor beam and the floor beam, and is supported by connecting the floor beams to a lower position of the floor plate that supports the lower end of the stair beam. It is good also as the vibration suppression structure of the stairs where the member is arrange | positioned.
And it is preferable that the lower end part of the said stair girder is being fixed to the said supporting member.
Furthermore, it is preferable that the bundle is provided between the support member and the foundation slab.
The bundle is preferably fixed to the foundation slab.
Furthermore, it is preferable that an intermediate portion of the stair girder is supported on the flooring material via a vibration isolation column. And it is preferable that the said anti-vibration support | pillar is being fixed to the said floor board.

  Therefore, in the staircase damping structure of the present disclosure, the rigidity of the floor board that supports the staircase girder is improved, vibration of the staircase girder can be suppressed, and generation of sound and vibration can be suppressed. Therefore, a vibration absorbing device or the like is not necessary, and by using an existing bundle, the staircase can be suppressed and vibration suppression can be achieved at low cost. Moreover, there is no restriction on the installation position of the stair girder, and the design flexibility is excellent.

Further, in the first embodiment, in the structure in which the bundle is provided between the floor beam and the foundation slab spanned between the floor beams, the rigidity of the floor board around the floor beam is ensured. It is possible to improve the vibration level when moving up and down the stairs.
Furthermore, in the structure in which the support member that connects the floor beams is arranged at the lower position of the floor plate that supports the lower end of the stair girder, the lower end of the stair girder is further compared to the structure in which no support member is provided. The rigidity of the floor board that supports the section is improved. Thereby, the damping performance of the stairs can be further improved.
In the structure in which the lower end portion of the stair girder is fixed to the support member, the support rigidity of the lower end portion of the stair girder can be improved, whereby the vibration damping performance of the stair can be further improved.
In the structure in which a bundle is provided between the support member and the foundation slab, the support rigidity at the lower end of the stair girder can be further improved compared to the structure without this bundle, thereby improving the damping performance of the stair. It can be further improved.
In the structure in which the bundle is fixed to the foundation slab, the support rigidity of the floor beam and the support member is further improved as compared with a structure in which the bundle is not fixed. For this reason, the damping performance of the stairs can be further improved.
In addition, in the structure in which the intermediate portion of the stair girder is supported by the floor board via the vibration-proof column, the vertical deflection of the stair girder when the stairs are raised and lowered is suppressed, and the vibration damping performance of the stairs can be further improved.
And in the structure in which the anti-vibration support is fixed to the floor board, the vertical deflection of the stair girder when the stairs are lifted is further suppressed, and the vibration control performance of the stairs is further improved compared to the structure that does not fix this. it can.

2 is a plan view of a unit building to which the staircase damping structure of Embodiment 1 is applied. FIG. It is a disassembled perspective view which shows a part of staircase to which the damping structure of Embodiment 1 is applied. 3 is a cross-sectional view showing a staircase to which the vibration damping structure for staircase of Embodiment 1 is applied. FIG. It is a perspective view which shows the principal part of the floor structure of the building unit to which the damping structure of the staircase of Embodiment 1 is applied. FIG. 3 is a cross-sectional view showing a main part of the staircase damping structure according to the first embodiment. It is sectional drawing which shows the principal part of the damping structure of the staircase of Embodiment 1, Comprising: It is the figure seen from the right direction of FIG. It is a three-plane figure which shows the support member used for the damping structure of the staircase of Embodiment 1, (a) is a top view of a support member, (b) is a side view of a support member, (c) is the front of a support member. FIG. It is a figure which shows the power girder used for the damping structure of the staircase of Embodiment 1, (a) is a top view of a power girder, (b) is a side view of a power girder, (c) is a bottom view of a power girder. , (D) is a cross-sectional view of the lower end portion of the force beam, (e) is an arrow view showing the lower end surface of the force beam viewed from the direction of the arrow Ye in (d), and (f) is an upper view of the upper portion of the force beam. Sectional drawing, (g) is an arrow view showing an upper end surface of a force girder as viewed from the direction of arrow Yg in (f). FIG. 3 is an exploded perspective view showing a vibration-proof post mounting structure used in the staircase vibration damping structure of the first embodiment. It is sectional drawing which shows the structure of the lower end part of the anti-vibration support | pillar used for the vibration damping structure of the staircase of Embodiment 1. FIG. 3 is a perspective view showing a support fitting that supports a lower end portion of a vibration isolating column used in the staircase vibration damping structure of the first embodiment.

Hereinafter, the form for implementing the vibration suppression structure of the staircase of this indication is explained based on a drawing.
(Embodiment 1)
The structure of the vibration damping structure for the staircase of the first embodiment will be described by dividing it into “entire structure”, “force girder support structure”, and “detailed structure of the vibration isolation column”.

[overall structure]
1 is a schematic plan view of a unit building to which the staircase damping structure according to the first embodiment is applied, FIG. 2 is a perspective view illustrating the staircase according to the first embodiment, and FIG. It is a side view of the stairs provided with the vibration suppression structure of the stairs of form 1. The overall configuration of the first embodiment will be described below with reference to FIGS.

  The staircase damping structure of the first embodiment is 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 B (see FIG. 3) to form a first-floor part. A plurality of upper floor building units 2 are placed thereon. A roof unit (not shown) is installed on the upper building unit 2 to form a roof. The unit building 1 is a collective housing, and a plurality of independent housing spaces (rooms) are formed by a plurality of building units 2 in each of the first floor part and the second floor part.

  The building unit 2 on the lower floor and the building unit 2 on the upper floor are both produced in a factory and are of a shaft type assembled in a box shape with columns and beams. In addition, each building unit including the building unit 2 on the lower floor may be a wall-type construction method in which a wall panel is erected on the periphery of the flooring and is assembled in a box shape.

  As shown in FIG. 1, the unit building 1 is provided with a stair unit 3 having a staircase 10 connecting the first floor and the second floor at a position surrounded by a building unit including a plurality of lower floor building units 2. Yes. The stair unit 3 has an atrium space extending over the first floor portion and the second floor portion.

  Here, when the foundation B and the floor structure shown in FIG. 3 are described, the foundation B is a so-called solid foundation structure including a foundation slab B1 and a foundation beam B2. Moreover, in the stair unit 3, the girder floor large beam 3e is supported by the foundation beam B2. In addition, the girder floor beam 3e is extended in the longitudinal direction (left-right direction of FIG. 3) of the unit in the both ends of the staircase unit 3 in the width direction (up-down direction of FIG. 1). And as shown in FIG. 4, FIG. 6, the floor beam 3a is spanned between a pair of girder floor big beams 3e. In FIG. 3 and FIG. 5 to be described later, the parenthesized numbers (1), (2), (3), and (4) are written after the symbol “3a” indicating the floor beam. In the description of FIG. 5, the reference numeral 3a is used when referring to a specific floor beam 3a with a parenthesis number. Therefore, when not pointing to the specific floor beam which has the code | symbol of (1)-(4), it only describes with "3a".

  Returning to FIG. 2, the staircase 10 is provided as an inner staircase of the staircase unit 3, and a plurality of treads 12 are supported by a pair of left and right force beams 11, 11 from the lower side. In the figure, the direction of the arrow Z is the vertical direction, the direction of the arrow Y is the width direction of the staircase 10, the direction of the arrow X is the horizontal plane and the staircase 10 extends, and the direction of the arrow S is the staircase 10 It is a direction along the inclination of

  As shown in FIG. 9, the force girder 11 is formed of channel steel having a U-shaped cross section. As shown in FIG. 3, the lower end portion 11α of the force beam 11 is supported by the floor plate 3d, and is bolted to the support member 40 attached to the floor beam 3a (1), 3a (2). Yes. The upper end 11β of the force beam 11 is bolted to the ceiling beam 3c of the stair unit 3. That is, the lower end 11α and the upper end 11β of the force beam 11 are supported by the beam structure of the staircase unit 3, respectively. The details of the support structure for the lower end portion 11α of the force beam 11 will be described later.

Here, the force girder 11 will be described.
The force beam 11 is made of metal and is formed in a U-shaped cross section with a web 11a, an upper flange 11b, and a lower flange 11c, as shown in FIG. As shown in FIG. 8, the lower end portion 11α and the upper end portion 11β are cut obliquely, and attachment pieces 11d and 11e are provided at the opening portions at both ends. The attachment pieces 11d and 11e may be provided by bending the main body portion of the force beam 11, or a metal plate piece separate from the force beam 11 may be attached by welding.

  A pair of bolt insertion holes 11f are opened in the mounting pieces 11d and 11e, respectively. The bolts fixed to the support member 40 and the ceiling beam 3c described above are performed by the bolts 11g inserted through the bolt insertion holes 11f.

Next, the tread 12 will be described.
As shown in FIG. 2, the tread 12 is fixed to the force girders 11 and 11 via a tread joining bracket 13 and a tread receiving bracket 14. The tread 12 is formed of, for example, a plastic recycled composite material, and has a structure having strength such as a honeycomb structure. The tread 12 has a rectangular plate shape in plan view, and is formed in an L-shaped cross-section by a tread surface portion 12a extending in the horizontal direction and a hanging flange portion 12b depending from a nose portion on the near side of the tread surface portion 12a. Is formed.

  The tread board joining bracket 13 is formed of a metal steel plate whose upper and lower end portions are bent in opposite directions in the horizontal direction and whose vertical cross section in the vertical direction is formed in a substantially Z shape. In the tread plate joint fitting 13, the lower plate 13 a is bolted to the upper flange 11 b of the force beam 11. In addition, the tread plate 12 is fixed to the tread plate joining bracket 13 by fastening a plurality of tapping screws 15 inserted from below the upper plate 13 b and penetrating the tread plate receiving bracket 14 to the back surface of the tread plate 12.

  The tread plate bracket 14 is bridged between a pair of left and right tread plate joint brackets 13 and 13 fixed to the left and right force girders 11 and 11, respectively, and receives an input load to the tread plate 12. The tread plate bracket 14 is a metal steel plate formed in a substantially inverted U-shaped cross section by a base plate portion 14a, a step-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 in contact with the back surface of the tread surface portion 12a of the tread plate 12 via an ultra high molecular weight polyethylene sheet (not shown). The step-out prevention part 14b protrudes downward from the end of the base plate part 14a on the nose side, and the lower end part of the base plate part 14a is not connected to the back of the base plate part 14a so that it does not get caught when the foot hits. It is bent towards the side. Further, the rear flange portion 14c protrudes downward from the rear end portion of the base plate portion 14a, and is formed in a dimension shorter than the vertical dimension of the step-out prevention portion 14b. In addition, the upper plate 13b of the tread plate joint fitting 13 is formed to have a size that fits between the step-out prevention portion 14b and the back flange portion 14c.

[Power beam support structure]
Next, the support structure of the lower end portion 11α of the force beam 11 will be described in detail with reference to FIGS.
FIG. 5 is an enlarged cross-sectional view showing a support structure of the lower end portion 11α of the force beam 11. 6 is a cross-sectional view of the staircase 10 as viewed from the right side of FIG. 7A and 7B are three views showing the support member 40. FIG. 7A is a plan view of the support member 40, FIG. 7B is a side view of the support member 40 viewed from the side, and FIG. It is the front view seen from the direction orthogonal to the beam 3a.

  As shown in FIG. 5, each of the pair of force girders 11 and 11 has a bolt 11g inserted into a bolt insertion hole 11f (see FIG. 8) opened in the attachment piece 11d (see FIG. 8) of the lower end portion 11α. The base plate 3d passes through and is fastened to the support member 40.

Here, the support member 40 will be described in detail.
As shown in FIG. 7C, the support member 40 is formed of a metal channel material having a U-shaped cross section by an upper piece 41, a middle piece 42, and a lower piece 43. A pair of through holes 44 are opened in the upper piece 41, and a back nut 45 is welded coaxially with the through holes. The support member 40 is joined to the floor beams 3a (1) and 3a (2) by welding in the first embodiment. However, the support member 40 is provided with a flange or the like, and a bolt, a nut, or the like. You may couple | bond using this fastening member.

  Both ends in the longitudinal direction of the support member 40 are coupled to the floor beam 3a (1), 3a (2), as shown in FIGS. The support member 40 is disposed at a position directly below the lower end portion 11α of each force beam 11.

  In the first embodiment, at the support position of the lower end portion 11α of the force beam 11, the floor beams 3a (1) and 3a (2) are bundled by the bundles 50 (a) and 50 (b) as shown in FIG. The support member 40 is supported by the bundle 50 (c). The bundles 50 (a), 50 (b), and 50 (c) have the same structure, and (a) to (c) are omitted when these specific ones are not pointed out. Thus, it is simply expressed as a bundle 50.

  Since the bundle 50 has a well-known structure, a brief description will be given. A weld bolt 52 is erected on the base plate 51, and a pipe 53 is fitted on the upper end of the weld bolt 52. The pipe 53 is integrated with the weld bolt 52 by tightening a nut 54. The height of the bundle 50 is adjusted by the screwing amount of the weld bolt 52 into the pipe 53. A weld bolt 55 is fitted into the upper end of the pipe 53, and the weld bolt 55 is integrated with the pipe 53 by tightening a nut 56. A support plate 57 is fixed to the upper end of the weld bolt 55 by welding or the like.

  The base plate 51 of each bundle 50 is fixed to the foundation slab B1 with concrete screws 51a. The support plates 57 of the bundles 50 (a) and 50 (b) are fixed to the floor beams 3a (1) and 3a (2) by tapping screws 57a. The support plate 57 of the bundle 50 (c) that supports the support member 40 is fixed to the support member 40 by a tapping screw 57b. A low-friction sheet (for example, a polyolefin film) is interposed between the support plate 57, the floor beam 3a (1), 3a (2), and the support member 40.

[Detailed structure of anti-vibration support]
Returning to FIG. 3, a vibration isolation column 30 is provided between the force beam 11 and the floor plate 3 d. Hereinafter, details of the anti-vibration column 30 will be described.

  As shown in FIG. 3, the intermediate portion in the longitudinal direction of the force beam 11 is supported by the floor plate 3 d via the vibration isolation column 30. The anti-vibration column 30 includes a column part 31 extending in the vertical direction and an anti-vibration part 32 provided between the upper end of the column part 31 and the force beam 11.

  The column portion 31 is formed of a hollow rectangular steel pipe, is disposed below the force beam 11, and is disposed so as to overlap the lower flange 11c of the force beam 11 in plan view. In addition, as shown in FIG. 9, in the column portion 31, a base plate 31c made of flat steel is fixed to the tip of the lower end portion 31a by welding. The base plate 31 c protrudes in a flange shape in the horizontal direction from the peripheral surface of the column portion 31. And this base plate 31c is being fixed to the support metal fitting 33 attached to the floor beam 3a with the volt | bolt 31d which penetrates the floor board 3d, as shown in FIG. 3, FIG.

  As shown in FIGS. 10 and 11, the support fitting 33 is formed of angle steel having an L-shaped cross section with a first piece 33 a and a second piece 33 b. The first piece 33a is welded and fixed to the side surface of the floor beam 3a.

  Further, the second piece 33b is opposed to the lower surface of the floor plate 3d and serves as a support surface extending along the lower surface of the floor plate 3d. A nut N is fastened from below the second piece 33b to a bolt BO that passes through the base plate 31c and the second piece 33b in order.

  As shown in FIG. 9, the vibration isolator 32 is formed of angled steel (angle) having an L-shaped cross section including a first piece 32 a and a second piece 32 b, and is attached to the tip of the upper end portion 31 b of the column portion 31. It is fixed by welding. In the vibration isolator 32, the first piece 32a welded to the column part 31 is fixed to the lower flange 11c (bottom surface) of the force girder 11 as a girder support surface. The second piece 32b of the vibration isolator 32 is vertically raised from the first piece 32a (girder support surface), and is fixed to the web 11a (side surface) of the force girder 11 as a second girder support surface. The vibration isolator 32 and the force beam 11 are fixed by a bolt BO and a nut N. Further, the first piece 32 a that is a girder support surface is enlarged along the extending direction of the force girder 11 (arrow X direction) rather than the cross-sectional area of the column part 31.

  Further, in the vibration isolator 32, an upper surface 321a that contacts the force beam 11 of the first piece 32a and an inner side surface 321b that contacts the force beam 11 of the second piece 32b are covered with the vibration isolation material 34, respectively. Yes. Here, as the vibration isolator 34, an elastic material such as a rubber sheet formed of chlorosulfonated polyethylene rubber (CSM) can be used.

Next, the operation will be described.
In the structure in which the lower end portion 11α of the power girder 11 is supported by the floor board 3d, when vibration occurs in the power girder 11 via the tread board 12 when the stairs are raised and lowered, the vibration is transmitted to the floor board 3d, and sound and vibration are generated. Further, even when the force girder 11 bends in the height direction of the staircase 10 (in the direction of arrow Z in FIG. 2) and the staircase 10 is pitched, sound and vibration are generated.

  In particular, when the building unit 2, i.e., the housing space (room) is arranged adjacent to the stair unit 3 as in the first embodiment, the vibration and sound of the staircase 10 may cause the housing space (room) of the building unit 2. ) Is more problematic as noise.

  On the other hand, in the staircase damping structure of the first embodiment, the lower end portion 11α of the force beam 11 that supports the tread 12 of the staircase 10 is installed on the floor plate 3d supported by the girder large beam 3e and the floor beam 3a. A bundle 50 is provided between the floor plate 3d and the foundation slab B1. For this reason, the rigidity of the floor board 3d at the position that supports the force girder 11 is improved, the vibration of the floor board 3d and the power girder 11 when the stairs are raised and lowered, the vibration of the stairs 10 is suppressed, and the generation of sound and vibration can be suppressed. .

In particular, when a residential space (room) by the building unit 2 is arranged adjacent to the stair unit 3 as in the first embodiment, sound and vibration can be suppressed as described above, and when the staircase 10 is raised and lowered Sound and vibration transmitted to the building unit 2 (room) can be reduced. Therefore, it is effective in the stairs installed outside the housing space such as an apartment house. As house noise, relatively low frequency vibrations are easily recognized as noise. As described above, by improving the rigidity of the floor plate 3d, low frequency components can be cut, which is effective for noise suppression.
Therefore, a vibration absorbing device or the like is unnecessary, and by using the existing bundle 50, the staircase 10 can be damped and vibration suppression can be achieved at low cost. In addition, the installation position of the force beam 11 is not limited, and the design flexibility is excellent.

  In the first embodiment, the bundles 50 (a) and 50 (b) are formed between the floor beam 3a (1), 3a (2) and the foundation slab B1 spanned between the girder large beams 3e. Since it is provided between them, the rigidity of the floor plate 3d around the floor beams 3a (1) and 3a (2) can be improved reliably. Thereby, the vibration of the floor plate 3d and the power girder 11 can be suppressed, the staircase 10 can be suppressed during the ascending / descending of the staircase, and the effect of suppressing the generation of sound and vibration can be obtained with certainty. Furthermore, since the bundles 50 (a) and 50 (b) are installed between the floor beam 3a and the foundation slab B1, the rigidity of the floor plate 3d can be improved over a wide range.

  Furthermore, since the support member 40 which connected floor beam 3a (1), 3a (2) is arrange | positioned in the downward position of the floor board 3d which supports the lower end part 11 (alpha) of the power girder 11, the support member 40 is provided. The rigidity of the floor plate 3d that supports the lower end portion 11α of the force beam 11 is further improved as compared with the structure without the above. Thereby, the vibration of the floor board 3d at the time of raising and lowering the stairs can be further suppressed, the vibration of the stairs 10 can be suppressed, and the generation of sound and vibration can be suppressed.

  Moreover, in the first embodiment, since the lower end portion 11α of the force girder 11 is fixed to the support member 40, the support rigidity of the lower end portion 11α of the force girder 11 is increased compared to the case where this fixing is not performed. It can be improved. Thereby, vibration suppression of the staircase 10 at the time of stair climbing can be achieved, and generation | occurrence | production of a sound and a vibration can be suppressed.

  That is, when vibration is generated in the force beam 11 by integrally supporting the lower end portion 11α of the force beam 11 by the support member 40 and the small beams 3a (1) and 3a (2) sandwiching the support member 40, the support member 40 is used. The small beams 3a (1) and 3a (2) also vibrate together. Therefore, by supporting the floor beam 3a (1), 3a (2) by the bundle 50 (a), 50 (b), the vibration of the floor beam 3a (1), 3a (2) can be suppressed. Thereby, while the vibration of the support member 40 is suppressed, the vibration of the lower end part 11α of the force beam 11 can also be suppressed.

  In addition, since the bundle 50 (c) is provided between the support member 40 and the foundation slab B1, the lower end portion 11α of the force girder 11 is supported as compared with the case in which the bundle 50 (c) is not provided. The rigidity can be further improved. Thereby, the vibration of the stairs 10 at the time of ascending / descending the stairs can be achieved, and the generation of sound and vibration can be further suppressed.

  Further, since the base plate 51 is fixed to the foundation slab B1 by the concrete screws 51a, the bundle 50 has a floor beam 3a (1), 3a (2) and a support member 40, as compared with those not performing this fixing. This further improves the support rigidity. For this reason, the vibration of the staircase 10 can be controlled and the generation of sound and vibration can be suppressed. In addition, in the embodiment, since the support plate 57 at the upper end of the bundle 50 is coupled to the floor beam 3a and the support member 40, the floor beam 3a and the support member 40 are compared with those in which this coupling is not performed. The rigidity and the floor board 3d are improved. Thereby, the vibration control performance can be further improved.

  As described above, the vibration of the floor beam 3a (1), 3a (2) and the support member 40 can be suppressed, so that the beam is transmitted to the floor beam 3a (3), 3a (4) arranged next to the beam. Vibration can be suppressed. Thereby, while being able to suppress the vibration of the whole floor board 3d, the transmission of the vibration to the room etc. of the building unit 2 adjacent to the stair unit 3 can be suppressed, and the noise suppression effect can be improved.

In the first embodiment, as a result of conducting an experiment to actually detect the noise when the stairs 10 is moved up and down, the floor beams 3a (1) and 3a (2) are supported by the bundles 50 (a) and 50 (b). In this case, the noise can be reduced by 1.0 dB compared to the case where this support is not performed.
Further, when the support member 40 was supported by the bundle 50 (c), the noise could be reduced by 2.0 dB compared to a case where this support was not performed.

  In addition, since the intermediate portion of the force beam 11 is supported by the floor plate 3d via the vibration isolation column 30, the vertical direction of the force beam 11 during ascending / descending compared to the case where the vibration isolation column 30 is not provided. Bending is suppressed, the vibration of the staircase 10 can be controlled, and the generation of sound and vibration can be suppressed.

  In addition, since the anti-vibration support column 30 is fixed to the floor plate 3d, the vertical deflection of the force beam 11 during ascending / descending is suppressed and vibration control of the stairs 10 is achieved as compared with a case where this anti-vibration is not performed. , Noise and vibration can be suppressed. Furthermore, since the lower end portion of the anti-vibration support column 30 is coupled to the support bracket 33 coupled to the floor beam 3a, the vertical deflection of the force beam 11 during raising and lowering is further suppressed than when coupled to the floor plate 3d alone. Thus, the vibration of the staircase 10 can be suppressed and the generation of sound and vibration can be suppressed.

  As described above, the staircase damping structure of the present disclosure has been described based on the embodiments, but the specific configuration is not limited to these embodiments, and the invention according to each claim of the claims Design changes and additions are permitted without departing from the gist of the present invention.

  In the embodiment, a so-called “force girder staircase” using a power girder that supports the tread board from below is shown as the stair girder, but the present invention is not limited to this. For example, the end part of the tread board is supported as the stair girder. It can also be applied to a “side-girder staircase” using side girders, or as a “stirling girder staircase” in which a tread plate is cut into a step shape to support it from below as a stair girder.

In the embodiment, the example in which the bundle is provided between the floor beam and the foundation slab and between the support member and the foundation slab has been described. However, the embodiment is not limited thereto, and at least the floor beam and the foundation slab are provided. If a bundle is provided between the two, the floor board can improve the support rigidity of the stair girder and obtain a vibration control action.
Further, in the embodiment, the lower end portion of the stair girder (force girder) is arranged between the floor beam and the floor beam. However, the present invention is not limited to this. It is also possible to arrange them at positions overlapping the floor beams. Further, even if the lower end of the stair girder (power girder) is disposed between the floor beams, as shown in the embodiment, the support member is provided below the lower end of the stair girder. You may make it support only by a floor board, without providing.
Or the thing which does not couple | bond a stair girder to a support member in the thing in which the support member which connected the floor beams is arrange | positioned in the downward position of the floor board which supports the lower end part of a stair girder is also contained in this indication. Even with such a structure, since the rigidity of the floor board that supports the stair girder is improved, the damping effect can be enhanced.

  Moreover, although the bundle showed what was fixed to the foundation slab, the beam, and the support member, it is not limited to this, and even if it is not fixed to any of the foundation slab, the beam, the support member, or all, the bundle is It is possible to improve the vibration damping performance by improving the rigidity of the floor board.

Further, in the embodiment, an example in which the intermediate portion of the stair girder is supported by the flooring material via the anti-vibration column is not limited thereto, and the anti-vibration column may not be provided. Or you may couple | bond with a side wall of a building unit instead of a vibration-proof support | pillar.
Further, in the embodiment, the example in which the vibration isolating column is fixed to the floor plate is shown, but the present invention is not limited to this, and the structure may simply support the stair girder without being fixed to the floor plate. Furthermore, in the embodiment, the anti-vibration column is coupled to the support fitting provided on the small beam, but is not limited thereto, and may be fixed only to the floor board.

In the embodiment, the example in which the vibration damping structure is applied to the staircase provided as the inner staircase of the staircase unit has been described. However, the present invention is not limited to this. For example, even an external staircase installed outside a building can be applied.
Furthermore, the staircase to which the damping structure is applied is not limited to the staircase installed in the unit building shown in the embodiment, and can be applied to a general building by a conventional construction method other than the unit building. .

3a Floor beam (floor beam)
3d Floor plate 3e Girder floor girder (floor beam: floor girder)
10 Stairs 11 Force girder (stair girder)
30 Anti-vibration support 40 Support member 50 (a) Bundle 50 (b) Bundle 50 (c) Bundle B Foundation B1 Foundation slab

Claims (8)

The floor structure supported by the floor beam is a vibration control structure for a staircase in which the lower end of a stair girder that supports the step board of the staircase is supported,
A staircase damping structure characterized in that a bundle is provided between the floor plate on which the lower end portion of the stair girder is installed and the foundation slab. In the vibration control structure of the staircase according to claim 1,
A plurality of floor beams are bridged between the floor beams of the floor beam,
The staircase damping structure according to claim 1, wherein the bundle is provided between the floor beam and the foundation slab. The vibration control structure for stairs according to claim 2,
The lower end portion of the stair girder is disposed between the floor beam and the floor beam.
A damping structure for a staircase, wherein a support member connecting the floor beams is disposed at a lower position of the floor plate that supports a lower end portion of the stair girder. In the vibration control structure of the staircase according to claim 3,
A lower structure of the stair girder is fixed to the support member. In the structure for damping a staircase according to claim 3 or claim 4,
A stair-damping structure for a staircase, wherein the bundle is provided between the support member and the foundation slab. In the damping structure of the staircase according to any one of claims 1 to 5,
The bundle is fixed to the foundation slab. In the damping structure of the staircase according to any one of claims 1 to 6,
The stair-damping structure according to claim 1, wherein an intermediate portion of the stair girder is supported by a floor material via a vibration-proof post. The vibration control structure for a staircase according to claim 7,
The vibration-damping structure for a staircase, wherein the vibration-proof column is fixed to the floor board.