JP4486484B2 - Staircase - Google Patents

Description

  The present invention relates to stairs.

  Conventionally, what is described in patent documents 1, for example is known as a step which suppresses vibration accompanying walking. This staircase is configured by attaching an additional vibration body type vibration damping device (TMD) to the staircase body in such a posture that its vibration direction is up and down. Therefore, it is possible to suppress the vertical vibration of the staircase body associated with walking without providing a support column in the middle span portion or increasing the width of the side beam.

However, in the staircase described in Patent Document 1, the natural frequency of the staircase itself varies depending on the number of people on the staircase. It was. As a solution to the problem of the staircase described in Patent Literature 1, a staircase damping structure as described in Patent Literature 2 is known. This vibration control structure of the staircase supports the upper end portion of the upper staircase portion so that the upper staircase portion can rotate in a rotating staircase provided with a landing between the lower staircase portion and the upper staircase portion having different inclination directions. A lower end portion is supported so as to be movable, and a vibration absorbing mechanism is provided on the movable support portion. Therefore, the structure is such that the vertical vibration input to the staircase is converted into rotational vibration and absorbed by the vibration absorption mechanism, so even if the natural frequency changes due to the load change on the staircase, The effect will not fade.
Japanese Patent No. 2975440 Japanese Patent Laid-Open No. 10-292587

  However, the conventional technique as described in Patent Document 2 has a problem that the staircase shape is limited to the staircase.

  An object of the present invention is to provide a staircase in which the vibration suppression effect is not diminished even if the natural frequency of the staircase itself changes depending on the number of people on the staircase and the like without limitation in the staircase shape. is there.

According to the first aspect of the present invention, in the staircase in which the upper end portion and the lower end portion of the staircase body are supported by the housing of the building, the upper end portion of the staircase body is joined to the housing, and the lower end portion of the staircase body is between the housing A vibration absorbing mechanism is provided and supported by the housing, and the vibration absorbing mechanism is capable of absorbing vertical deflection generated at the lower end of the staircase body . The vibration absorbing mechanism includes a columnar stud attached to the lower end of the staircase body. A cushion rubber attached to the outer periphery of the columnar stud so as to cover the outer periphery of the columnar stud; a bottomed container-like cap provided on the inner periphery of the cushion rubber; and below the cushion rubber A damping plate mounted on the lower end of the columnar stud and silicone filled in a cavity partitioned by the damping plate at the bottom of the cap Characterized in that it is composed of a file.

  The invention according to claim 2 is the staircase according to claim 1, wherein the upper part and the lower part of the staircase main body are straight staircases inclined in the same direction.

According to a third aspect of the present invention, in the staircase according to the first or second aspect, the staircase main body is composed of right and left saddle girders and step plates spanned between the girders. It is provided in the lower end part .

  According to the first aspect of the present invention, the upper end portion of the staircase body is joined to the housing, the lower end portion of the staircase body is supported by the housing with the vibration absorbing mechanism provided between the lower body and the vibration absorbing mechanism. Therefore, when vertical vibration is generated in the stairs due to a person going up and down, the vertical vibration is absorbed by the vibration absorbing mechanism. Therefore, even if the natural frequency of the stairs itself changes due to the number of people on the stairs, etc., because the structure is absorbed by the vibration absorbing mechanism, the damping effect is not diminished. There are no restrictions on the shape of the stairs.

According to the first aspect of the present invention, since the vibration absorbing mechanism includes the spring member and the damper member, the vertical vibration is effectively absorbed by the spring member and can be quickly attenuated by the damper member.

According to the second aspect of the present invention, since the upper part and the lower part of the staircase body are straight stairs inclined in the same direction, the staircase structure can be simplified.

According to the third aspect of the present invention, since the vibration absorbing mechanism is provided at the lower end portion of each sagittal girder, the vertical vibration can be absorbed in a balanced manner.

  1 and 2 show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of a building frame to which a staircase is attached. 2A is a cross-sectional view showing in detail the lower end of the staircase in FIG. 1, and FIG. 2B is a view taken in the direction of arrows AA in FIG. FIG. 3A is a cross-sectional view showing in detail a lower end portion of a staircase attached to a position different from that in FIG. 2, and FIG. 3B is a view taken along the line BB in FIG. 4A is a plan view of the vibration absorber, and FIG. 4B is a cross-sectional view. In the figure, 1 is a staircase, 2 is a staircase body, 3 and 4 are building frames, and 5 is a vibration absorber.

  The staircase 1 of the present embodiment is an open staircase installed on the second floor of a building, and the building is a unit-type building constructed by arranging a plurality of building units adjacent to each other. As shown in FIG. 1, the staircase 1 is such that the upper end of the staircase body 2 is rigidly joined to a housing 3 (for example, a second-floor ceiling beam) with bolts, nuts, and the like. The lower end portion of the staircase body 2 is supported by the housing 4 by providing a vibration absorbing device 5 between the housing 4. The staircase 1 includes a handrail (not shown) on the upper side of the staircase body 2, but there are no walls above and below the staircase body 2, and an open space is formed below the staircase body 2. The vibration absorber 5 can absorb the vertical deflection T generated at the lower end of the staircase body 2 (see FIG. 1). The frame 4 is a floor beam provided below the second floor FL.

  The staircase 1 of the present embodiment is a straight staircase in which the upper part and the lower part of the staircase body 2 are inclined in the same direction, but a landing is provided between the upper part and the lower part of the staircase body 2. Also good.

  The vibration absorbing device 5 includes a spring member and a damper member, and details thereof are shown in FIG. The vibration absorbing device 5 shown in FIG. 4 includes a steel columnar stud 52 attached so that the studs 51 protrude upward, a cushion rubber 53 attached so as to cover the outer periphery of the columnar stud 52, and a cushion rubber. A flanged case 54 embedded in the periphery thereof to support 53, a bottomed container-like cap 55 that is also flanged so as to overlap the flange of the case 54, and a stud 52 positioned below the cushion rubber 53 A disc-shaped damping plate 56 mounted so as to protrude horizontally from the lower end of the cap, and a silicone oil 57 filled in a cavity partitioned by the damping plate 56 at the bottom of the cap 55. It is configured. A plug 58 is provided for filling the silicone oil 57. In the vibration absorbing device 5, the cushion rubber 53 functions as a spring member, and the silicone oil 57 and the damping plate 56 filled in the bottom of the cap 55 absorb the vibration input through the stud 52. The plate 56 functions as a damper member by attenuating the silicone oil 57 by stirring.

  As shown in FIGS. 2 and 3, the staircase body 2 of the staircase 1 includes left and right saddle beams 21 and step plates 22 spanned between the shear beams 21. It is provided at the lower end portion of each sheath beam 21.

  The staircase body 2 shown in FIG. 2 is an example in which the ascending / descending direction of the staircase 1 is provided in a direction parallel to the floor beam 41 (it is a straight staircase along the girder direction of the building unit, and does not reach the wife beam) "Girder straight open stairs"). At this time, the vibration absorbing device 5 is mounted with the hexagon bolt nuts 7 and 7 in the recesses of the mounting hardware 43 spanned between the two parallel floor beams 42 and 42 orthogonal to the floor beam 41 to vibrate. A planting bolt 51 protruding upward from the upper end portion of the absorber 5 is attached to the lower end portion of the spar 21 so as to be sandwiched between two upper and lower nuts 6 and 6 screwed therein.

  Further, the staircase body 2 shown in FIG. 3 is an example directly attached to the floor beam 41 on the girder side (a “straight open staircase” that is a straight stairway along the wife direction of the building unit and reaches the girder beam). At this time, the vibration absorbing device 5 is attached to the mounting hardware 43 attached to the inside of the floor beam 41 with hexagonal bolt nuts 7, 7, and the implanted bolt 51 protruding upward from the upper end portion of the vibration absorbing device 5. It is attached to the lower end of the spar 21 so as to be sandwiched between two nuts 6 and 6 which are screwed into the upper and lower parts. In FIG. 3, reference numerals 44 denote pillars provided at the four corners of the building unit.

  According to the staircase 1 of the present embodiment configured as described above, the following operational effects are obtained.

  (1) The upper end portion of the staircase body 2 is joined to the housing 3, and the lower end portion of the staircase body 2 is supported by the housing 4 by providing a vibration absorbing device 5 between the housing 4 and the vibration absorbing device 5. Since the vertical deflection T generated at the lower end of the stairs 1 can be absorbed, when the vertical vibration is generated in the stairs 1 due to a person going up and down, the vertical vibration is absorbed by the vibration absorbing device 5. Therefore, even if the natural frequency of the stairs itself changes due to the number of people on the stairs 1, etc., the structure is absorbed by the vibration absorbing device 5, so that the damping effect is not diminished. There is no restriction on the shape of the stairs.

  (2) Furthermore, since the upper part and the lower part of the staircase body 2 are straight stairs inclined in the same direction, the staircase structure can be simplified.

  (3) Further, since the vibration absorbing device 5 includes the cushion rubber 53 that is a spring member, the damping plate 56 that is a damper member, and the silicone oil 57, the vertical vibration is effectively absorbed by the spring member. At the same time, it can be quickly attenuated by the damper member.

  (4) Furthermore, since the vibration absorbing device 5 is provided at the lower end of each sheathing girder 21, it can absorb vertical vibrations in a well-balanced manner.

  As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and the present invention can be applied even if there is a design change or the like without departing from the gist of the present invention. included. For example, although the staircase of the present embodiment is a straight staircase, the present invention may be a spiral staircase or a rotating staircase.

  The staircase of the present invention has no limitation on the shape of the staircase, and it can mitigate vibrations of the staircase, vibration of the frame (mainly the floor surface) to which the staircase is attached, and impact noise when ascending and descending downstairs. Realize housing, collective housing, etc.

It is one Embodiment of this invention, Comprising: It is a longitudinal cross-sectional view of the housing of the building where the stairs were attached. (A) is sectional drawing which shows the lower end part of the staircase of FIG. 1 in detail, (b) is an arrow line view in AA of (a) figure. (A) is sectional drawing which shows the lower end part of the staircase attached in the position different from FIG. 2 in detail, (b) is an arrow directional view in the BB line of (a) figure. (A) is a top view of a vibration absorber, (b) is sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stair 2 Stair body 21 Sasara girder 22 Step board 3, 4 Frame 5 Vibration absorber

Claims (3)

In the staircase where the upper and lower ends of the staircase body are supported by the building's enclosure,
The upper end of the staircase body is joined to the housing, and the lower end of the staircase body is supported by the housing with a vibration absorbing mechanism between it and the vibration absorbing mechanism absorbs the vertical deflection that occurs at the lower end of the staircase body. Made possible ,
The vibration absorbing mechanism is provided with a columnar stud attached to the lower end of the staircase body, a cushion rubber attached to the outer periphery of the columnar stud so as to cover the outer periphery of the columnar stud, and the cushion rubber on the inner periphery, A container-like cap with a bottom attached to the housing, a damping plate located below the cushion rubber and attached to the lower end of the columnar stud, and a hollow portion partitioned by the damping plate at the bottom of the cap A staircase characterized in that it is made of silicone oil .   The staircase according to claim 1, wherein the staircase main body is a straight staircase in which an upper portion and a lower portion of the staircase body are inclined in the same direction. Stairway body, left and right sasara digits consists multiplied and passed stair treads between sasara digits, vibration absorbing mechanism according to claim 1 or 2, characterized in that provided at the lower end of each sasara digit Stairs.

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