JP2006112062A - Stairs for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose stairs for a building providing a sense of high quality, causing neither vibration nor vibration noise even if stepboards and open strings are combined. <P>SOLUTION: In the stairs 1 for the building, an arrangement hole 8 is formed in a support face 6A of a fitting groove 6 of the open string 4, and the arrangement hole 8 is provided with a vibration absorbing mechanism 9. The stepboard 5 is fitted into the fitting groove 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a building staircase having improved appearance quality and improved vibration control performance.

  A high design effect is required for an exposed staircase that allows the back side of the staircase to pass through between the stepboards. However, because both ends of the stepboard are supported only by the countersink, vibration occurs when moving up and down. However, it is desirable to take measures.

As such an anti-vibration structure, in Japanese Patent Application Laid-Open No. 10-292587 of Patent Document 1, a vibration absorbing mechanism is provided in a portion for fixing a staircase to a building.
Japanese Patent Laid-Open No. 10-292587

  However, in the structure of the above-mentioned Japanese Patent Application Laid-Open No. 10-292587, the fixing part for fixing the stairs to the building becomes complicated, so the design and construction of the building structure may have to be changed. In addition, since the gap necessary for the moving support portion or its blinding member appears in the appearance, there is a problem that the design effect is lowered. On the other hand, there is a method of simply improving the strength of the girder, but there is a problem that the weight and cost increase due to an increase in the cross-sectional area of the girder and reinforcement is required on the building side, which increases the cost.

  The present invention has been made paying attention to such a problem, and in the staircase where the space between the step plates is a space, the present invention does not expose the appearance of the anti-vibration mechanism to the exterior design while providing the anti-vibration mechanism. It aims at providing the staircase for buildings which has high designability.

  In order to solve the above-described problem, a building staircase according to claim 1 of the present invention is a combination of a step board on which a foot is placed and a saddle girder that supports the step board. A vibration absorbing mechanism for absorbing vibration caused by a load applied to the step plate is provided between the fitting groove to be inserted and the step plate sandwiched between the fitting grooves.

  A building staircase according to a second aspect of the present invention is the building staircase according to the first aspect, wherein a plurality of the vibration absorbing mechanisms are provided, and each of the plurality of vibration absorbing mechanisms has the same natural frequency or It is characterized by being different.

  According to the building staircase according to claim 1 of the present invention, the vibration absorbing mechanism is provided on either the support surface of the step plate of the fitting groove or the step plate of the fitting girder, and the step plate is provided in the fitting groove. As a result, the vibration absorption mechanism is not exposed to the surface even when a corrugated board and a spar girder are combined. Since a vibration absorbing mechanism is provided in the case, vibration and vibration sound are not generated, and a high-class feeling can be obtained. In the building staircase, it is usual that both ends of the step board are coupled to the spar. However, the central part or other part of the step slab may be coupled to the spar.

  According to the building staircase according to claim 2 of the present invention, if a plurality of sets having the same natural frequency are used, the absorption effect of the frequency component is increased, and if a plurality of sets having different natural frequencies are used, An effect of absorbing a plurality of frequency components can be obtained with respect to complicated vibration.

  FIG. 1 shows a building staircase (hereinafter simply referred to as a staircase) 1 according to the best mode for carrying out the present invention. In this staircase 1, 2 is the floor of the first floor, 3 is the floor of the second floor, 4 is the countersink girder, 5 is the step plate, 6 is the fitting groove of the countersink 4, 7 is the fitting groove of the step plate 5, 8 Arrangement holes formed in the fitting groove of the sheathing girder 4, 9 is a vibration absorbing mechanism, and handrails are not shown.

  The staircase 1 is formed by an exposed staircase unit in which both ends of a step plate 5 are combined and coupled between a pair of sheathing girders 4 and a handrail is provided on the step plate 5. The staircase 1 is attached and fixed between the floor 2 on the first floor and the floor 3 on the second floor.

  The combination portion for coupling the step plate 5 and the spar 4 is composed of the fitting groove 6 of the spar 4 and the fitting groove 7 of the step plate 5, and the fitting grooves 6, 7 are brought into close contact with each other. . The fitting grooves 6 and 7 have groove widths corresponding to the thicknesses of the sheathing girder 4 and the step plate 5, respectively. A space 13 is formed between the upper and lower step plates 5, and the state behind the stairs 1 can be seen through the space 13.

  An arrangement hole 8 extending in the vertical direction is formed in the support surface 6A of the fitting groove 6 into which the step plate 5 is fitted, and the vibration absorbing mechanism 9 is attached to the arrangement hole 8. In consideration of the strength of the spar 4, the arrangement hole 8 is approximately ３ or less of the width of the spar 4 and the depth is ½ or less of the vertical section height of the spar 4.

  The vibration absorbing mechanism 9 includes a cylindrical weight 10, a spring 11, and a storage cylinder 12. A push spring 11 is housed inside the housing cylinder 12, and a weight 10 is supported on the spring 11. The weight 10 is integrally coupled with the spring 11, and the storage cylinder 12 is inserted into the arrangement hole 8. In order to push the step plate 5 upward by the push spring 11, the weight 10 is projected from the support surface 6A before the step plate 5 is joined. For this reason, when inserting the step board 5 into the fitting groove 6 of the spar 4, a jig (not shown) (for example, a thin steel plate) is placed on the weight 10 to place the weight 10 below the support surface 6A. Insert the corrugated board 5 after pressing down. If the jig is removed after inserting the step plate 5, the lower surface of the step plate 5 can be supported by the weight 10.

  As described above, the weight 10 protrudes from the support surface 6A of the fitting groove 6 and applies a force for pushing up the lower surface of the step plate 5. When the step plate 5 and the spar 4 are rattled due to aging, The step plate 5 is pushed up to prevent vibrations such as rattling.

  The upper surface of the weight 10 is preferably a smooth surface because it supports the lower surface of the step plate 5 for a long period of time. However, the upper surface of the weight 10 is loose so as to draw an arc in the direction in which the step plate 5 is inserted into the further beam 4. A curved surface or a chamfered portion may be provided on the insertion tip portion side to facilitate the connection between the step plate 5 and the spar 4.

The natural frequency f composed of the weight 10 and the spring 11 is f = 1 / (2π) · (k / m) ^1/2.
(K is a spring constant, m is mass). Although there is a restriction on the size of the weight 10 due to the thickness of the girders 4, etc., the natural frequency is determined by adjusting the spring according to the weight weight obtained within the restriction range. The location where the installation hole 8 for mounting the vibration absorbing mechanism 9 is formed is effective in the vicinity of the center of the staircase in which the spar 4 is most likely to vibrate. In the staircase 1 of FIG. 1, one vibration absorbing mechanism 9 is provided for each of the pair of left and right shear beams 4, but a plurality of vibration absorbing mechanisms 9 may be installed on the support surface of the fitting groove 6. In that case, if multiple sets with the same natural frequency are used, the absorption effect of the frequency component increases, and if multiple sets with different natural frequencies are used, multiple frequency components are absorbed for complex vibration. Effect is obtained.

  Note that the vibration absorbing mechanism 9 may be provided on the lower surface or the upper surface side of the step plate 5 or on both the step plate 5 and the spar 4. The vibration absorbing mechanism 9 uses the push spring 11, but may be an elastic body such as a disc spring, a leaf spring, rubber, soft plastic, or cork, or may be configured by combining these appropriately stacked.

  According to the building staircase according to the above embodiment, the vibration absorbing mechanism 9 is provided on either the support surface 6A of the fitting groove 6 or the step plate 5 formed in the sheathing girder 4, and the fitting groove 6 Since the step plate 5 is fitted, the vibration absorbing mechanism 9 is not exposed to the surface even if the step plate 5 and the spar 4 are combined, and a design configuration combining only natural trees can be expressed. Since the vibration absorbing mechanism 9 is provided in the combination part with the sagara girder 4, vibration and vibration sound are not generated, and a high-class feeling can be obtained.

The disassembled perspective view of the building staircase concerning the best form of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building stairs 2 1st floor 3 2nd floor 4 Sasara girders 5 Step plates 6 Saws girder fitting grooves 7 Steps mating grooves 8 Arrangement holes 9 Vibration absorbing mechanism 10 Weight 11 Spring 12 Storage cylinder

Claims (2)

  In a combination portion of a step plate on which a foot is placed and a saddle girder that supports the step plate, the step between the fitting groove into which the step plate is inserted and the step plate sandwiched between the fitting grooves. A staircase for buildings, which is provided with a vibration absorbing mechanism for absorbing vibration caused by a load applied to a board.   The building staircase according to claim 1, wherein a plurality of the vibration absorbing mechanisms are provided, and the natural frequency of each of the plurality of vibration absorbing mechanisms is equal or different.

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