JP2018053482A - Stairway damping metal fitting and stairway damping structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stairway damping metal fitting capable of suppressing the rolling of the stairway which occurs when a person climbs up and down the stairway.SOLUTION: A stairway damping metal fitting 20 (first damping metal fitting 21) consists of a first junction 21a to be fixed to a web 11a which is a side surface of a force beam 11, a second junction 21b to be fixed to a stud 4a of a lower floor building unit 4 present on the side of a stairway 10, and a band plate 21c connecting the first junction 21a and the second junction 21b.SELECTED DRAWING: Figure 5A

Description

  The present invention relates to a stair vibration control fitting and a stair vibration control structure.

  2. Description of the Related Art Conventionally, when installing a staircase, a staircase structure is known in which a girder that supports a tread board is directly fixed to a wall of a building structure that stands on the side of the staircase (see, for example, Patent Document 1). Moreover, the staircase structure which connected the side surface of the girder and the pillar of the building structure via the bracket is also known (for example, refer patent document 2).

JP 2016-89415 A Japanese Patent Laid-Open No. 2001-65134

However, as in the technique of Patent Document 1, in the case where the middle position of a girder is connected to the building structure using a staircase structure that directly fixes the girder to the wall of the building structure on the side of the staircase, the girder and the building structure There is a problem that it cannot be applied to a force girder in which a gap is formed between the two.
On the other hand, the technique disclosed in Patent Document 2 is applicable even to a force girder in which a gap is generated between the girder and the building structure. The bracket structure described in Patent Document 2 is used to set the middle position of the girder to the building structure. Can be connected to the body. However, in the bracket described in Patent Document 2, a shock absorbing material (horizontal vibration) generated when ascending / descending stairs is sandwiched between a first bracket fixed to a girder and a second bracket fixed to a column ( The vibration absorbing material is absorbed by deformation. Therefore, although vibration transmission from the stairs to the building structure can be prevented, there arises a problem that the stairs themselves are shaken when the stairs are raised and lowered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a stair vibration control fitting and a stair vibration control structure that can suppress the rolling of a stair that occurs when a stair is raised and lowered.

  The stairs damping metal fitting according to the present invention includes a first joint fixed to a side surface of a girder that supports a step board of a stairs, a second joint fixed to a building structure existing on the side of the stairs, and a first joint. And a band plate connecting the second joint portion.

The first joint has a first joint surface that faces the side surface of the beam, and the second joint has a second joint surface that faces the building structure, and the first joint surface and the second joint. The surface may be parallel.
Furthermore, the fixed position of the first joint portion relative to the beam and the fixed position of the second joint portion relative to the building structure may be shifted in the extension direction of the beam in plan view.
Moreover, the fixed position with respect to the girder of the 1st junction part and the fixed position with respect to the building structure of the 2nd junction part may correspond with the extending | stretching direction of a tread board in planar view.
Furthermore, it is preferable that a vibration isolating material is provided on at least one of the first joint surface facing the beam of the first joint and the second joint surface facing the building structure of the second joint.
Moreover, the 1st junction part, the 2nd junction part, and the strip | belt board may be formed in the three-layer structure which pinched | interposed the both surfaces of the vibration isolator with a pair of board | plate material.

  In the stair damping structure of the present invention, the first joint of the stair damping bracket is fixed to the side surface of the girder that supports the step board of the staircase, and the second joint of the stair damping bracket exists on the side of the staircase. Connected to the building structure.

Moreover, it is a building unit in which a building structure has a column material, Comprising: It is preferable that the 2nd junction part of stair-damping metal fittings is being fixed to the column material.
Furthermore, the building structure may be a building unit having an outer wall material, and the second joint portion of the stair vibration control fitting may be fixed to the outer wall material.

  Further, in the stair vibration control structure of the present invention, the stair vibration damping fitting has a fixed position of the first joint portion with respect to the girder and a fixed position of the second joint portion with respect to the building structure in the extension direction of the girder in plan view. The first damping bracket, 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 footboard in plan view. A first joint of the first and second damping brackets is fixed to the side surface of the beam, and a second joint of the first and second damping brackets is fixed to the building structure. May be.

And the building structure is a building unit having a pillar material, and at least one of the second joint portion of the first damping bracket and the second joint portion of the second damping bracket is fixed to the same pillar member of the building unit. May be.
Furthermore, the building structure may be a building unit having an outer wall material, and at least one of the second joint portion of the first damping bracket and the second joint portion of the second damping bracket may be fixed to the outer wall material. .

  Therefore, the stair vibration damping 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 of the stair girder can be used without any vibration isolator. The building structure can be connected. Therefore, it is possible to suppress the bending of the girder in the lateral direction of the stairs and suppress the rolling of the stairs that occurs when the stairs are raised and lowered.

Furthermore, in the stair vibration damping fitting in which the first joint surface and the second joint surface are parallel, it can be reliably attached to the stairs arranged in parallel to the building structure.
In the stair vibration control fitting in which the fixing position of the first joint portion and the fixing position of the second joint portion are shifted in the extension direction of the girder in a plan view, the band plate is attached to the vibration acting in the extension direction of the girder. Deformation can be made difficult, and rolling in the extending direction of the girders and the width direction of the stairs can be efficiently suppressed.
In addition, the fixing position of the first joint and the fixing position of the second joint coincide with the extending direction of the footboard in plan view, and the first joint and the second joint are connected by a pair of parallel strips. In the existing stair vibration control fitting, it is possible to make it difficult for the band plate to be deformed by vibrations acting in the extending direction of the tread board, and to suppress the roll in the width direction of the staircase.
Further, in the stair vibration control fitting provided with the vibration isolating material on at least one of the first joint surface and the second joint surface, the vibration input to the building structure from the stairs can be absorbed by the vibration isolating material. Vibration transmission from the stairs to the can be suppressed.
Furthermore, in the case where the first joint portion, the second joint portion, and the band plate are formed in a three-layer structure in which both sides of the vibration isolating material are sandwiched by a pair of plate materials, the building structure is input from the stairs. Vibration can be absorbed by the vibration isolator, and vibration transmission from the stairs to the building structure can be suppressed.

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

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

  In addition, the first vibration-damping fitting in which the first joint portion and the second joint portion are displaced in the extension direction of the digit in plan view, and the first joint portion and the second joint portion in the extension direction of the tread plate in plan view. In the staircase damping structure using the matching second damping bracket and the staircase damping bracket, the first damping bracket mainly receives vibrations acting in the extension direction of the girder and acts in the extension direction of the footboard. The vibration can be mainly received by the second damping fitting. For this reason, the rolling resistance of the stairs in various directions generated when the stairs are raised and lowered can be effectively suppressed by the deformation resistance of the first and second damping fittings.

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

It is a top view of the unit building to which the staircase damping structure of Example 1 is applied. FIG. 3 is a partially exploded perspective view showing the stairs of the first embodiment. It is a side view which shows the staircase to which the stair-damping structure of Example 1 is applied. It is a top view which shows the staircase damping structure of Example 1. It is a perspective view which shows the 1st damping metal fitting of Example 1. FIG. It is a side view which shows the 1st damping metal fitting of Example 1. FIG. It is AA sectional drawing in FIG. 4B. It is a perspective view which shows the 2nd damping metal fitting of Example 1. FIG. It is a side view which shows the 2nd damping metal fitting of Example 1. FIG. It is a perspective view which shows the attachment structure of the stair-damping metal fitting of Example 1. FIG. It is a perspective view which shows the attachment structure of the stair-damping support | pillar of Example 1. FIG. It is a side view which shows the lower end part of the pillar part of the stair-damping support | pillar of Example 1. FIG. It is a perspective view which shows the support metal fitting of the stair vibration suppression support | pillar of Example 1. FIG. It is a side view which shows the upper end part and vibration isolator of the pillar part of the stair-damping support | pillar of Example 1. It is BB sectional drawing in FIG. 9A. It is a perspective view which shows the deformability of the stair damping metal fitting of Example 1. FIG.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the stair-damping metal fitting and stair-damping structure of this invention is demonstrated based on Example 1 shown in drawing.

Example 1
First, the configuration of the stair vibration damping fitting and the stair vibration damping structure of the first embodiment will be described by being divided into “overall configuration”, “detailed configuration of the stair vibration damping bracket”, and “detailed configuration of the stair vibration damping column”.

[overall structure]
FIG. 1 is a schematic plan view of a unit building to which the staircase damping structure of the first embodiment is applied, FIG. 2A is a perspective view showing the staircase 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 damping structure. Hereinafter, based on FIGS. 1-2B, the whole structure of Example 1 is demonstrated.

  The staircase damping 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 units are placed on the 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).

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

  As shown in FIG. 1, the unit building 1 has a staircase unit 3 having a stairwell space at a position surrounded by a plurality of building units, and a staircase 10 that connects the first floor and the second floor. It has been.

  The staircase 10 is provided as an internal staircase of the staircase unit 3, and, as shown in FIG. 2A, a pair of left and right force beams 11, 11 (girder) formed of U-shaped grooved steel, and force A plurality of step plates 12,... Bridged over the girders 11, 11, and the plurality of step plates 12,.

  2B, the lower end 11α of the force beam 11 is bolted to a metal fitting 3b attached to the floor beam 3a (beam material) of the stair unit 3, and the upper end 11β of the stair unit 3 is Bolts are fixed to the ceiling beam 3c. That is, the force girder 11 is supported by the frame structure of the stair unit 3 at the upper and lower ends 11α and 11β.

  The tread plate 12 is fixed to the force beams 11 and 11 via a tread plate joint fitting 13 and a tread plate receiving bracket 14 (see FIG. 2A). This tread board 12 is formed of, for example, a plastic recycled composite material, and has a structure having a strength such as a honeycomb structure. The tread plate 12 is formed in an L-shaped cross section by a tread surface portion 12a extending horizontally in the shape of a rectangular plate in plan view and a hanging flange portion 12b depending from a nose portion on the near side of the tread surface portion 12a. Has been.

  The footboard joint fitting 13 is formed of a metal steel plate whose upper and lower ends are bent in opposite directions in the horizontal direction and whose vertical section in the vertical direction is substantially Z-shaped. In this tread plate joint fitting 13, the lower plate 13 a is bolted to the upper flange 11 b of the force beam 11. Further, 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 receiving bracket 14 is bridged between a pair of left and right tread plate joining 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 joined to 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.
Note that 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.

[Detailed configuration of stair damping bracket]
FIG. 3 is a plan view illustrating the staircase damping structure of the first embodiment. 4A to 4C show the first vibration damping fitting of the first embodiment, and FIGS. 5A and 5B show the second vibration damping fitting of the first embodiment. Furthermore, FIG. 6 is a perspective view showing the mounting structure of the stair vibration damping fitting of the first embodiment. Hereinafter, based on FIGS. 3-6, the detailed structure of the stair-damping metal fitting of Example 1 is demonstrated.

As shown in FIG. 3, in the staircase damping structure of the first embodiment, the web 11a (side surface) of the force beam 11 that supports the tread 12 of the staircase 10 and the staircase 10 of the plurality of lower floor building units 2,. Is connected to the lower floor building unit 4 (building structure existing on the side of the stairs 10) by using the stairs damping metal fitting 20. In the first embodiment, the stair vibration damping fitting 20 includes a first damping fitting 21 and a second damping fitting 22, and a predetermined interval is provided along the extending direction S of the power beam 11. Are installed.
Here, the “stretching direction S of the force beam 11” is an inclined direction along the force beam 11.

  As shown in FIG. 4A to FIG. 4C and FIG. 6, the first vibration damping fitting 21 includes a first joint portion 21a, a second joint portion 21b, and a band plate 21c.

  The first joint portion 21 a is a square flat steel plate and is fixed to the web 11 a of the force beam 11. Moreover, the 1st joining surface 211a facing the web 11a of the 1st junction part 21a is covered with the vibration isolator 23 (refer FIG. 4C).

  The 2nd junction part 21b is the square shape flat steel of the same shape as the 1st junction part 21a, and is being fixed to the stud 4a of the lower floor building unit 4 (building structure) which exists in the side of the stairs 10. . Moreover, the 2nd junction surface 211b facing the lower floor building unit 4 of the 2nd junction part 21b is covered with the vibration isolator 23 (refer FIG. 4C).

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

  The band plate 21c is a rectangular flat steel, and one end in the longitudinal direction is connected to the upper end 212a of the first joint 21a, and the other end in the longitudinal direction is on the lower side of the second joint 21b. It is connected to the end 212b. Thereby, the 1st junction part 21a and the 2nd junction part 21b are connected by the strip 21c.

In the first vibration damping fitting 21, the first joint surface 211 a and the second joint surface 211 b are parallel to each other and shifted in the extending direction X in plan view of the force beam 11. Thereby, when the 1st damping fitting 21 is fixed to the force beam 11 and the stud 4a, the fixed position with respect to the force beam 11 of the 1st junction part 21a and the fixed position with respect to the stud 4a of the 2nd junction part 21b are plane. When viewed, it shifts in the extending direction S of the force beam 11. In addition, the height position (position of the height direction Z of the staircase 10) of the 1st joint surface 211a and the 2nd joint surface 211b corresponds.
Here, “the extending direction X of the force beam 11 in plan view” is a horizontal direction along the extending direction S of the force beam 11 in plan view.

  As shown in FIG. 5A, FIG. 5B, and FIG. 6, the 2nd damping metal fitting 22 has the 1st junction part 22a, the 2nd junction part 22b, and a pair of strip | belt plate 22c.

  The first joint portion 22 a is a square flat steel plate and is fixed to the web 11 a of the force beam 11. Further, the first bonding surface 221 a facing the web 11 a of the first bonding portion 22 a is covered with a vibration isolating material 23.

  The second joint portion 22b is a square 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. . The second joint surface 221b facing the lower floor building unit 4 of the second joint 22b is covered with a vibration isolator 23.

  The pair of strips 22c, 22c is rectangular flat steel having the same shape. One end of the 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. In addition, one end in the longitudinal direction of the other band plate 22c is connected to the lower end 223a of the first joint 22a, and the other end in the longitudinal direction is connected to the lower end 223b of the second joint 22b. Thereby, the 1st junction part 22a and the 2nd junction part 22b are connected by a pair of strips 22c and 22c.

And the 1st joint surface 221a and the 2nd joint surface 221b are mutually parallel, and this 2nd damping metal fitting 22 exhibits the rectangular parallelepiped shape open | released in the transversal direction. The first and second joint surfaces 221a and 221b coincide with the extending direction Y of the tread plate 12 in plan view. Thereby, when the 2nd damping metal fitting 22 is fixed to the force beam 11 and the stud 4a, the fixed position with respect to the force beam 11 of the 1st junction part 22a and the fixed position with respect to the stud 4a of the 2nd junction part 22b are plane. It coincides with the extending direction Y of the tread plate 12 (the width direction of the stairs 10), which is the width direction of the stairs 10 when viewed. In addition, the height position (position of the height direction Z of the staircase 10) of the 1st joint surface 221a and the 2nd joint surface 221b corresponds.
Here, the “extending direction Y of the tread plate 12” is a horizontal direction orthogonal to the extending direction X of the force girder 11 in plan view.

  And as shown in FIG. 6, as for the 1st damping metal fitting 21 and the 2nd damping metal fitting 22, both 1st junction parts 21a and 22a are surrounded by the upper side flange 11b and the lower side flange 11c of the force beam 11. The first joint portions 21a and 22a are bolted to the web 11a via the vibration isolator 23. The second joint portions 21b and 22b are bolted to the stud 4a through the vibration isolator 23 and the outer wall material 4c in this order.

Here, the first damping bracket 21 and the second damping bracket 22 are bridged between the force beam 11 and the lower building unit 4 after the stair unit 3 and the lower building unit 4 are assembled. It is.
Therefore, first, the first vibration-damping fitting 21 and the second vibration-damping fitting 22 are both in the state in which the longitudinal direction of the strips 21c and 22c is substantially aligned with the extending direction X of the power beam 11 in plan view. Is inserted into a space surrounded by the power beam 11, the tread board 12, and the lower floor building unit 4. At this time, in particular, in the first damping 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 beam 11.

Once the first damping bracket 21 and the second damping bracket 22 enter the space surrounded by the force beam 11, the tread plate 12, and the lower floor building unit 4, then the first damping bracket 21 and the second damping bracket 21 The damping metal fitting 22 is rotated along the horizontal direction so that the first joint portions 21a and 22a face the force beam 11 and the second joint portions 21b and 22b face the lower floor building unit 4. When the first joint surfaces 211a and 221a face the force beam 11 and the second joint surfaces 211b and 221b face the outer wall member 4c of the lower floor building unit 4, the first vibration-damping fitting 21 and the second vibration-damping fitting 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.
Thereby, both the 2nd junction part 21b of the 1st damping metal fitting 21 and the 2nd junction part 22b of the 2nd damping metal fitting 22 are fixed to the stud 4a via the outer wall material 4c.

And after fixing the 2nd junction parts 21b and 22b, the 1st junction parts 21a and 22a are bolt-fixed to the web 11a of the force beam 11, respectively.
At this time, the first damping fitting 21 is disposed below the second damping fitting 22.

[Detailed structure of stair vibration control column]
FIG. 7 is an exploded perspective view illustrating the mounting structure of the stair vibration control column according to the first embodiment. Moreover, FIG. 8A shows the lower end part of the column part of the stair-damping strut of Example 1, and FIG. 8B is a perspective view which shows the support bracket of a stair-damping strut. 9A and 9B show an upper end portion and a vibration isolating portion of the column portion of the stair vibration control column according to the first embodiment. Hereinafter, based on FIGS. 7-9B, the detailed structure of the stair-damping support | pillar of Example 1 is demonstrated.

  As shown in FIG. 2B, in the staircase damping structure of the first embodiment, the intermediate portion in the longitudinal direction of the force beam 11 that supports the tread plate 12 of the staircase 10 is placed on the floor 3d by the staircase damping post 30 that extends in the vertical direction. It is supported by. Here, the stair vibration control column 30 includes a column portion 31 extending in the vertical direction, and a vibration isolation portion 32 provided between the upper end portion 31 b of the column portion 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 overlaps the lower flange 11c of the force beam 11 in plan view (see FIG. 3). Further, as shown in FIG. 8A, a base plate 31c made of flat steel is welded and fixed to the tip of the lower end 31a. The base plate 31c has a peripheral edge protruding in the horizontal direction from the peripheral surface of the pillar 31 and forms a flange (see FIG. 7). 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 flooring 3d.
Thereby, the lower end part 31a is fixed to the flooring 3d, and the pillar part 31 stands upright in the vertical direction.

  Here, the support bracket 33 is formed of angle steel 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. And the 2nd piece 33b opposes the lower surface 3e of the flooring 3d, and becomes a support surface extended along the lower surface 3e of the flooring 3d. Then, a nut 31 is screwed from below the second piece 33b to a bolt 31d that passes through the base plate 31c and the second piece 33b in order, so that the flooring is provided between the base plate 31c and the second piece 33b of the support fitting 33. 3d is sandwiched.

The vibration isolator 32 is formed of angle steel with an L-shaped cross section (angle), and is welded and fixed to the tip of the upper end portion 31 b of the column portion 31. And this vibration isolator 32 is a girder support surface which the 1st piece 32a welded to the pillar part 31 fixes to the lower flange 11c (bottom surface) of the power girder 11. FIG. The second piece 32b of the vibration isolator 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 vibration isolator 32 and the force beam 11 are fixed by bolts B and nuts N. Further, the first piece 32 a which is a girder support surface is enlarged along the extending direction S of the force girder 11 rather than the cross-sectional area of the column part 31.

  Further, the vibration isolator 32 has an upper surface 321a facing the force beam 11 of the first piece 32a and an inner side surface 321b facing the force beam 11 of the second piece 32b, respectively, covered with the vibration isolation material 34. Yes. Here, the vibration isolator 34 is a rubber sheet formed of chlorosulfonated polyethylene rubber (CSM).

Next, the operation will be described.
First, the “stair vibration generation mechanism” will be described, and then the operations of the first embodiment will be described as “step vibration prevention action by the stair vibration damping bracket”, “step vibration prevention action by the stair vibration damping column”, “metal fitting and The explanation will be divided into "step vibration prevention action by both columns".

[Mechanism of staircase vibration]
In the staircase 10 according to the first embodiment, a pair of force beams 11 and 11 that support a plurality of treads 12 are bridged between a metal fixture 3b attached to the floor beam 3a of the staircase unit 3 and the ceiling beam 3c. ing. That is, the force girder 11 is supported by the frame structure of the stair unit 3 at the upper and lower end portions 11 α and 11 β.

Here, the force beam 11 is a long member made of channel steel having a U-shaped cross section, but is not fixed because upper and lower ends 11α and 11β which are both ends in the longitudinal direction are fixed. The intermediate portion in the longitudinal direction is easily bent in the width direction of the staircase 10 (extension direction Y of the tread plate 12) and the front-rear direction of the staircase 10 (extension direction X in plan view of the force beam 11).
As a result, when a load is input to the force girder 11 via the tread plate 12 when the stairs are raised and lowered, the force girder 11 is moved in the width direction of the stairs 10 (extension direction Y of the tread plate 12) and in the front-rear direction of the stairs 10 (force girder 11). In the extending direction X) in plan view, and the roll of the staircase 10 (horizontal shake) is generated.

Moreover, the upper end 11β which is the other longitudinal direction end is fixed to the upper position rather than the lower end 11α which is one longitudinal direction end, and the longitudinal direction intermediate part floats in the air. It is in a state. Therefore, the middle part of the force beam 11 is pulled downward in the vertical direction by its own weight, and is easily bent 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 the stairs are raised and lowered, the force girder 11 bends in the height direction Z of the stairs 10 and generates a vertical swing (vertical swing) of the stairs 10. .

[Stair vibration prevention action by stair vibration control bracket]
In the stair vibration damping structure of the first embodiment, a stair damping metal fitting 20 is disposed between the staircase 10 and the lower floor building unit 4 adjacent to the side of the stair unit 3 where 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 using the stair vibration control fitting 20.

  Here, the stair vibration damping fitting 20 includes a first vibration damping fitting 21 and a second vibration damping fitting 22. And the 1st damping fitting 21 is the 1st junction part 21a fixed to the web 11a of the force girder 11, and the 2nd junction part 21b fixed to the stud 4a of the lower floor building unit 4 of the side of the stairs 10. And a strip 21c that connects the first joint 21a and the second joint 21b. In addition, the second vibration-damping fitting 22 is also fixed to the first joint 22a fixed to the web 11a of the force beam 11 and the second joint 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, 22c that connect the first joint 22a and the second joint 22b.

Therefore, the first and second vibration damping fittings 21 and 22 that are the stair vibration damping fitting 20 are both stretched between the force beam 11 and the lower floor building unit 4. Accordingly, when the stairs 10 are moved up and down, if the force beam 11 vibrates in the width direction of the stairs 10 (extension direction Y of the tread 12) and approaches the lower floor building unit 4, the stairs damping bracket 20 ( Interfering with the first and second damping fittings 21 and 22), the proximity movement to the lower floor building unit 4 of the power girder 11 is prevented.
On the other hand, if the power girder 11 vibrates in the width direction of the staircase 10 (the extending direction Y of the tread plate 12) and tries to move away from the lower-floor building unit 4, the power girder 11 is connected to the stair vibration damping fitting 20 (first and second). By being connected to the lower-floor building unit 4 via the 2 damping fittings 21, 22), the separated movement from the lower-floor building unit 4 of the power girder 11 is prevented.
Furthermore, if the force girder 11 vibrates in the front-rear direction of the staircase 10 (the extending direction X in plan view of the power girder 11) and the relative position with respect to the lower floor building unit 4 tends to shift, By being connected to the lower-floor building unit 4 via the vibration-damping bracket 20 (first and second vibration-damping brackets 21 and 22), displacement of the force beam 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 staircase 10 (extension direction Y of the tread 12) and the front-rear direction of the staircase 10 (extension direction X in plan view of the power girder 11). It is possible to suppress the rolling of the staircase 10 that occurs during ascending and descending.

Incidentally, in the stair vibration damping fitting 20 (first and second damping fittings 21 and 22) of the first embodiment, the strips 21c and 22c are adjusted in accordance with the width of the gap between the force beam 11 and the lower floor building unit 4. If the length is adjusted, the force beam 11 and the lower floor building unit 4 can be appropriately connected. That is, the stair vibration damping fitting 20 can be applied even when the gap between the force beam 11 and the lower floor building unit 4 is wide.
Further, the stair vibration damping fitting 20 (first and second damping fittings 21 and 22) includes a band plate in which the first joint portions 21a and 22a and the second joint portions 21b and 22b are not interposed with vibration-proof materials. 21c and 22c are connected. Therefore, since it is not the structure which absorbs the vibration of the staircase 10 in the middle of the lower-floor building unit 4 from the power beam 11, it can prevent that the problem that the staircase 10 itself shakes at the time of stair climbing.

  Moreover, since the intermediate portion in the longitudinal direction 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 intermediate portion in the longitudinal direction 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 being bent downward by a load acting downward in the vertical direction when the stairs are raised and lowered. As a result, in the stair vibration damping fitting 20 of the first embodiment, it is possible to suppress not only the roll but also the pitch of the staircase 10.

  In the first embodiment, in the first damping member 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. Moreover, also in the 2nd damping metal fitting 22, the 1st joining surface 221a of the 1st junction part 22a and the 2nd joining surface 221b of the 2nd junction part 22b are mutually parallel.

Therefore, it is easy to install the first and second damping brackets 21 and 22 between the staircase 10 arranged in 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.
In addition, the first joint surface 211a of the first joint portion 21a, the second joint portion 21b, the vibration receiving direction by the first joint portions 21a and 22a, and the vibration receiving direction by the second joint portions 21b and 22b coincide with each other. It is possible to improve resistance to vibration input from the girder 11 to the stair vibration damping fitting 20 (first and second damping fittings 21 and 22). Therefore, deformation of the stair vibration damping fitting 20 (first and second vibration damping fittings 21 and 22) at the time of vibration input can be suppressed, and the rolling suppression effect of the staircase 10 generated when the staircase 10 is raised and lowered can be improved.

  Moreover, in the first damping fitting 21 of the stair damping fitting 20, the first joining surface 211a and the second joining surface 211b are shifted in the extending direction S of the force beam 11 in plan view, and the first joining The fixing position of the portion 21a with respect to the force beam 11 and the fixing position of the second joint portion 21b with respect to the stud 4a are shifted in the extending direction S of the force beam 11 in plan view.

Thereby, after inserting this 1st damping metal fitting 21 between the power girder 11 installed previously and the outer wall material 4c, it can attach to the power girder 11 and the lower-floor building unit 4 easily.
That is, since the 1st junction part 21a and the 2nd junction part 21b are not facing, the 2nd junction part 21b does not become obstructive at the time of bolt fixation of the 1st junction part 21a. Further, when the second joint 21b is fixed with bolts, the first joint 21a does not get in the way. Thereby, fixation of the 1st damping metal fitting 21 can be performed easily.

  The band plate 21c of the first damping member 21 is attached in a state of being inclined in the extending direction X in plan view of the power beam 11 with respect to the extending direction Y of the tread plate 12 (width direction of the stairs 10). As a result, the band plate 21c is stretched between the force beam 11 and the lower floor building unit 4 and at the same time is less likely to bend and deform with respect to the vibration acting in the extending direction S of the force beam 11. Thereby, the deformation | transformation of the 1st damping metal fitting 21 at the time of vibration input can be suppressed more. As a result, the rolling suppression effect of the staircase 10 can be further improved.

  On the other hand, in the second damping fitting 22 of the stair damping fitting 20, the first joining surface 221a and the second joining surface 221b coincide with the extending direction Y of the tread 12 in a plan view, and the first joining portion 22a The fixed position with respect to the force beam 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 footboard 12 in plan view.

  Thereby, the strip 22c of the 2nd damping metal fitting 22 is attached in the state along the extending | stretching direction Y of the tread board 12. As shown in FIG. That is, the band plate 22c is less likely to bend and deform with respect to the vibration acting in the extending direction Y of the tread plate 12, and the deformation of the second damping 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 fitting 22, the upper and lower end portions 222a, 222b, 223a, 223b of the first and second joint portions 22a, 22b are connected by the pair of strip plates 22c, 22c and opened in the short direction. It is a rectangular parallelepiped. Therefore, it is possible to make the band plate 22c more difficult to bend, and to further improve the rolling suppression effect of the stairs 10.

  In the staircase damping structure of the first embodiment, the staircase damping bracket 20 is not easily bent and deformed with respect to the vibration acting in the extending direction X of the power girder 11 in plan view, and the tread plate. 12 and a second damping metal fitting 22 that is not easily bent and deformed with respect to vibration acting in the extending direction Y.

  As a result, vibrations acting in the extending direction S of the force beam 11 can be suppressed by the first damping fitting 21, and vibrations acting in the extending direction Y of the tread 12 can be suppressed by the second damping fitting 22. It is possible to further improve the rolling suppression effect in various directions that occurs during ascending and descending.

In addition, as for the 1st, 2nd damping metal fittings 21 and 22, as for all, 2nd junction part 21b, 22b is being fixed to the same stud 4a of the lower floor building unit 4 adjacent to the staircase 10. FIG.
Therefore, since vibrations in different directions of the staircase 10 are efficiently suppressed by the two metal fittings, the first and second damping metal fittings 21 and 22 attached at close positions, the vibration is not amplified. The rolling suppression effect of the stairs 10 can be further enhanced.

  Moreover, in this Example 1, the 2nd junction part 21b, 22b is being fixed to this stud 4a via the outer wall material 4c supported by the stud 4a. By this outer wall material 4c, the second joint portions 21b and 22b are fixed at places where deformation is difficult, and the roll suppression effect of the staircase 10 can be further improved.

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

  Therefore, the 1st, 2nd damping metal fittings 21 and 22 are the 1st joint surfaces 211a and 221a which all face the web 11a of the power beam 11, and the 2nd joint surfaces 211b which face the lower floor building unit 4, respectively. The anti-vibration material 23 is provided in both of 221b. Thereby, the vibration of the staircase 10 can be absorbed by the vibration isolator 23, and the vibration transmitted to the lower-floor building unit 4 through the first and second vibration damping fittings 21 and 22 which are the stair damping fittings 20. Can be suppressed. As a result, the rolling suppression effect of the staircase 10 can be further improved.

[Stair vibration prevention action by stair vibration control column]
In the stair vibration control structure of the first embodiment, a stair vibration control column 30 is disposed below the force beam 11 of the staircase 10. And the lower end part 31a of the column part 31 of this stair vibration control column 30 is fixed to the flooring 3d, and the vibration isolating part 32 provided in the upper end part 31b of the column part 31 is fixed to the lower flange 11c of the force beam 11. Has been. Further, the vibration isolator 32 has a first piece 32 a (girder support surface) that is expanded along the extending direction S of the force beam 11 with respect to the cross-sectional area of the column part 31.

  Therefore, when a load acting on the tread 12 is transmitted to the force beam 11 when the stairs are raised and lowered, and a load directed downward in the vertical direction is applied to the force beam 11, this load is applied to the vibration isolator of the stairs damping column 30. 32 first pieces 32a (girder support surfaces). The vibration isolation portion 32 can be supported by the pillar portion 31 along the vertical direction from below the force beam 11.

  As a result, the force beam 11 can be prevented from bending in the height direction Z of the staircase 10, and the pitching of the staircase 10 that occurs when the staircase 10 is raised and lowered can be suppressed.

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

  In particular, in the first embodiment, since the stair vibration control column 30 supports the substantially center in the longitudinal direction of the force girder 11, it is possible to support a position that is most easily bent downward in the force girder 11, The pitching can be more effectively prevented.

  Further, the stair vibration control column 30 does not support the load acting on the staircase 10 but prevents the force girder 11 from being bent and suppresses vibrations. The support structure may be simple. Thereby, it can be set as the cheap structure which suppressed cost.

  Further, in the first embodiment, the vibration isolator 32 has a second piece 32b that is a second girder support surface that rises vertically from the first piece 32a that 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 staircase 10 (the extending direction Y of the tread plate 12) when ascending and descending the stairs, the second piece 32b interferes with the web 11a. Directional vibration is prevented. Thereby, it is possible to prevent the force beam 11 from being bent in the lateral direction of the staircase 10 (the extending direction Y of the tread plate 12), and to suppress the roll of the staircase 10 that occurs when the staircase 10 is raised and lowered.

  In the first embodiment, the upper surface 321a and the inner side surface 321b of the vibration isolator 32 facing the force beam 11 are both covered with the vibration isolator 34. Therefore, the vibration of the staircase 10 can be absorbed by the vibration isolator 34, and the vibration transmitted from the force beam 11 to the stair vibration control column 30 can be suppressed. As a result, the vibration suppressing effect of the staircase 10 can be further improved.

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

  Thereby, it can prevent that a clearance gap produces between the base plate 31c and the support metal fitting 33. FIG. And the wobbling of the base plate 31c can be suppressed, the column part 31 can be stood up stably, and the pitching suppression effect of the staircase 10 can be improved.

[Stairs vibration prevention action by both bracket and support]
In the stair vibration control structure of the first embodiment, the web 11a of the power beam 11 and the stud 4a of the lower floor building unit 4 are connected by the stair vibration control fitting 20, and the longitudinal intermediate position of the power beam 11 is It is supported from below by the stair vibration control column 30 in the vertical direction.

  Therefore, both the roll and pitch of the stairs 10 are suppressed in the walking vibration when the stairs are raised and lowered by the effect of preventing the stairs from rolling by the stairs damping metal fitting 20 and the effect of preventing the stairs from shaking by the stairs damping column 30. Can do.

  As mentioned above, although the stair-damping metal fitting and stair-damping structure of the present invention have been described based on the first embodiment, the specific configuration is not limited to this embodiment, and each claim of the claims Design changes and additions are permitted without departing from the spirit of the invention.

In the first embodiment, the stair vibration damping fitting 20 includes the first damping fitting 21 and the second damping fitting 22, but the present invention is not limited thereto. For example, as the stair vibration damping fitting 20, only the first vibration damping fitting 21 may be applied, or only the second vibration damping fitting 22 may be applied.
That is, the first vibration-damping fitting 21 and the second vibration-damping fitting 22 may be used alone or in combination.
Moreover, since the stair-damping metal fitting 20 should just be provided with the 1st junction part, the 2nd junction part, and a strip | belt board, for example, it is H-shaped steel, I-shaped steel, groove-shaped steel with a U-shaped cross section, Also good. Regardless of which steel material is used, the stair vibration damping fitting 20 can be obtained by causing the flange portion to correspond to the first and second joint portions and the web portion to correspond to the strip.

  Further, in the first embodiment, in the first and second damping fittings 21 and 22, the first joint surfaces 211a and 221a of the first joint portions 21a and 22a and the second joint surfaces 211b of the second joint portions 21b and 22b. , 221b are shown as being covered by the vibration isolator 23. However, the present invention is not limited to this, and only one of the first bonding surfaces 211a and 221a or the second bonding surfaces 211b and 221b may be covered with the vibration isolator 23. Further, the vibration isolator 23 may not be provided.

Further, as in the staircase damping fitting 40 shown in FIG. 10, the first joint portion 41, the second joint portion 42, and the strip plate 43 are composed of a pair of steel plates (plate members) 44, 44. You may form in the three-layer structure which pinched | interposed both surfaces.
Even in this case, the vibration of the staircase 10 can be absorbed by the vibration isolator 45, and the vibration transmitted to the lower floor building unit 4 via the stair vibration damping fitting 40 can be suppressed. As a result, the rolling suppression effect of the staircase 10 can be further improved.

Moreover, in Example 1, the 2nd junction parts 21b and 22b of the 1st, 2nd damping metal fittings 21 and 22 which are the stair-damping metal fittings 20 are all fixed to the stud 4a of the lower floor building unit 4. An example is shown. However, the present invention is not limited to this. For example, when the outer wall material 4c supported by the stud 4a is relatively rigid such as a structural laminated material, a wood cement board, or a wall panel whose surface is covered with a steel plate, etc. You may fix 2 junction part 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 damping fittings 21 and 22, and the roll suppression effect of the stairs 10 is enhanced. Can do.

  Furthermore, in the first embodiment, an example in which the second joint portions 21b and 22b of the first and second vibration damping fittings 21 and 22 that are the staircase damping fitting 20 are fixed to the same stud 4a is shown. However, the second joint portion 21b of the first vibration damping fitting 21 and the second joint portion 22b of the second vibration damping fitting 22 may be fixed to different studs 4a. Further, one of the second joint portions 21b and 22b of the first and second damping fittings 21 and 22 may be fixed to the stud 4a and the other may be fixed to the outer wall member 4c. That is, you may arrange | position the 1st, 2nd damping metal fittings 21 and 22 in the position shifted | deviated to the extending direction S of the power beam 11. FIG.

The staircase 10 shown in the first embodiment is a so-called “power girder staircase” that supports the tread board 12 by the force girder 11, but may be a “side girder staircase” that supports the tread board by the side girder, It may be a “Sasara Girder Staircase” in which the treadle is supported by the sasara girder.
That is, if it is a staircase which has a girder which supports a foot board, the stair-damping metal fitting and stair-damping structure of this invention can be applied.

And although the stair-damping metal fitting 20 and stair-damping structure of Example 1 showed the example applied to the staircase 10 provided as the inner staircase of the staircase unit 3, it is not restricted to this. For example, the stair vibration damping fitting 20 and the stair vibration damping structure of the first embodiment can be applied even to an external staircase installed outside a building. Furthermore, the stair vibration damping fitting 20 and the stair vibration damping structure of Example 1 were installed not only on the staircase installed in the unit building such as the staircase unit 3 but also in a general building (a wooden building, a reinforcing bar building, etc.). It can also be applied to stairs.
In other words, the present invention can be applied to any staircase in which a building structure exists on the side of a girder that supports the step board of the staircase.

1 Unit building 2, 4 Lower floor building unit 3 Stair unit 10 Stair 11 Power girder
11a Web (side view)
11b Upper flange 11c Lower flange 12 Tread plate 13 Tread plate joint bracket 14 Tread plate bracket 20 Stair damping bracket 21 First damping bracket 21a First joint portion 211a First joint surface 21b Second joint portion 211b Second joint surface 21c band Plate 22 Second damping fitting 22a First joint portion 221a First joint surface 22b Second joint portion 222b Second joint surface 22c Band plate 23 Anti-vibration material 30 Stair vibration control column 31 Column portion 31a Lower end portion 31b Upper end portion 31c Base plate 32 Anti-vibration part 33 Support bracket 34 Anti-vibration material

Claims (12)

A first joint that is fixed to the side of the spar that supports the step board of the stairs;
A second joint to be fixed to the building structure present on the side of the stairs;
A strip connecting the first joint and the second joint;
Stair damping metal fitting characterized by comprising. In the stair-damping fitting according to claim 1,
The first joint portion has a first joint surface facing the side surface of the beam,
The second joint portion has a second joint surface facing the building structure,
The stair damping fitting, wherein the first joint surface and the second joint surface are parallel. In the stair-damping metal fitting according to claim 1 or claim 2,
The stair vibration damping fitting characterized in that a fixing position of the first joint portion with respect to the girder and a fixing position of the second joint portion with respect to the building structure are shifted in the extending direction of the girder in a plan view. . In the stair-damping metal fitting according to claim 1 or claim 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 coincide with the extending direction of the footboard in plan view. Hardware. In the stair-damping metal fitting according to any one of claims 1 to 4,
An anti-vibration material is provided on at least one of the first joint surface facing the beam of the first joint and the second joint surface facing the building structure of the second joint. Stair damping metal fittings. In the stair-damping metal fitting according to any one of claims 1 to 4,
The stair-damping metal fitting, wherein the first joint portion, the second joint portion, and the band plate are formed in a three-layer structure in which both surfaces of a vibration-proof material are sandwiched between a pair of plate materials. A stair vibration control structure using the stair vibration control fitting according to any one of claims 1 to 6,
The first joint portion of the stair vibration control fitting is fixed to the side surface of the girder that supports the step board of the staircase, and the second joint portion of the stair vibration control fitting is fixed to the building structure existing on the side of the staircase. Stair vibration control structure characterized by being. The staircase damping structure according to claim 7,
The building structure is a building unit having a pillar material,
The second joint portion is fixed to the column member. The staircase damping structure according to claim 7,
The building structure is a building unit having an outer wall material,
The second joint portion is fixed to the outer wall material. A stair-damping structure using the stair-damping metal fitting according to claim 1 or 2,
In the stair vibration control fitting, the fixed position of the first joint with respect to the girder that supports the step board of the staircase and the fixed position of the second joint with respect to the building structure existing on the side of the staircase are in the plan view. The first damping metal fitting shifted in the extension direction of the girder, 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 are the extension direction of the tread plate in plan view A second damping fitting that matches the
The first joint of the first damping bracket and the first joint of the second damping bracket are fixed to the side surfaces of the girders, respectively, and the second joint of the first damping bracket and the second damping bracket are fixed. A stair vibration control structure, wherein the second joints of the metal fittings are respectively fixed to the building structure. The staircase damping structure according to claim 10,
The building structure is a building unit having a pillar material,
The stair vibration control structure, wherein the second joint portion of the first vibration damping fitting and the second joint portion of the second vibration damping fitting are fixed to the same column member. The staircase damping structure according to claim 10,
The building structure is a building unit having an outer wall material,
The stair vibration control structure, wherein the second joint portion of the first vibration damping fitting and the second joint portion of the second vibration damping fitting are fixed to the outer wall material.