JP6976911B2 - Stairs structure - Google Patents

Description

The present invention comprises a pair of left and right steel sasara girders, a plurality of treads arranged between the pair of sasara girders and supported by the sasara girders, and a handrail support arranged above the sasara girders. It relates to a staircase structure with a handrail supported by the Sasara girder through the material.

In such a staircase structure, conventionally, a pair of left and right Sasara girders are made of channel steel having a U-shaped cross section, and the U-shaped open portion is arranged so as to face laterally outward. It is known that the handrail support material that supports the above is supported by the sasara girder via the handrail support member welded to the upper surface of each sasara girder (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 10-77729

According to the prior art described in the above patent document, since the pair of left and right Sasara girders are composed of a channel steel having a U-shaped cross section, the Sasara girder is effective in the entire U-shaped cross section of the channel steel. It is possible to secure the cross-sectional area, and the support of the treads and handrails by the Sasara girder is ensured.
However, it cannot be said that the handrail support member is aesthetically pleasing in appearance, as the handrail support member for supporting the handrail support material on the sasara girder is arranged so as to project upward from the upper surface of each sasara girder.
In addition, if the layout structure of the handrail support member is modified to improve the aesthetic appearance, the size of the Sasara girder will inevitably increase, and if it is tried to avoid it, it will be difficult to secure the required effective cross-sectional area. Problem arises.

The present invention focuses on such conventional problems, and an object thereof is that the Sasara girder has a relatively large effective cross-sectional area, can reliably support a tread plate and a handrail, and has an appearance. It is also to provide a neat staircase structure.

The first characteristic configuration of the present invention is a pair of left and right steel sasara girders, a plurality of steps of treads arranged between the pair of sasara girders and supported by the sasara girders, and above the sasara girders. It is a staircase structure provided with a handrail that is arranged in and supported by the Sasara girder via a handrail support material, and the Sasara girder welds an L-shaped steel material having an L-shaped cross section and a flat steel material having a flat plate shape. It is configured so that its cross-sectional shape is vertically long, open upward and hollow U-shaped, the tread plate is supported by the L-shaped steel material of the sasara girder, and the handrail support material is open upward of the sasara girder. It is inserted into the internal space of the Sasara girder from the mouth and is supported by the Sasara girder in the space.

According to this configuration, the Sasara girder is formed by welding an L-shaped steel material having an L-shaped cross section and a flat steel material having a flat plate shape, and the cross-sectional shape is formed into a vertically long, upwardly open and hollow U-shape. Therefore, it is possible to construct a Sasara girder having a required effective cross-sectional area with a relatively small amount of welding.
That is, when a U-shaped sasara girder is made of steel, it is also possible to make all of the pair of left and right side plates and the bottom plate connecting the bottoms of the side plates with steel plates and weld them together. However, in that case, the amount of welding is large and the effective cross-sectional area is relatively small.
In that respect, when composed of L-shaped steel material and flat steel material, the welding amount is about half, and the effective cross-sectional area is relatively large due to the existence of the L-shaped steel material having an integrated side plate and bottom plate. , It is possible to reduce the formation of the Sasara girder.
Since the plurality of steps of the treads are supported by the L-shaped steel material of the sasara girders, the support of the treads by the sasara girders is strong and reliable. Further, since the handrail support material that supports the handrail is inserted into the internal space from the upper opening of the sasara girder and is supported by the sasara girder in the space, the support portion between the handrail support material and the sasara girder is , It will be completely hidden in the internal space of the Sasara girder, and it will have a refreshing appearance.

The second characteristic configuration of the present invention is that the L-shaped steel material of the Sasara girder is composed of angle steel having a part of one side cut off.

According to this configuration, the L-shaped steel material of the Sasara girder is composed of angle steel with a part of it cut off, so it is only necessary to use commercially available angle steel and cut off a part of that side. The L-shaped steel material of the Sasara girder can be manufactured easily and inexpensively.

In the third characteristic configuration of the present invention, the support bracket for supporting the handrail support material is arranged in the internal space of the Sasara girder in a state where a wiring space is secured below the support bracket, and the handrail is provided on the support bracket. The lower end of the support material is supported.

According to this configuration, a support bracket that supports the handrail support material is arranged in the internal space of the Sasara girder in a state where a wiring space is secured below the support bracket, and the lower end portion of the handrail support material is attached to the support bracket. Since it is supported, the handrail placed above the Sasara girder is reliably supported by the Sasara girder via the handrail support material and the support bracket.
Since a space for wiring is secured below the support bracket, it is necessary to lay it along the stairs, for example, wiring for signal transmission of various safety devices and alarm devices, or electric wires for power supply. Wiring can be safely placed in the wiring space without being visible from the outside.

The fourth characteristic configuration of the present invention is provided with a vibration damping system including a vibration sensor that detects the vibration of the Sasara girder and an actuator that applies vibration of the opposite phase to the Sasara girder based on the information from the vibration sensor. , The vibration sensor is arranged on a tread plate supported substantially in the center in the longitudinal direction of the Sasara girder, and the actuator is attached to the lower surface of the end portion of the L-shaped steel material constituting the Sasara girder, and the control is performed. The wiring for the vibration system is arranged in the wiring space.

According to this configuration, a vibration control system equipped with a vibration sensor that detects vibration of the Sasara girder and an actuator that applies vibration of the opposite phase to the Sasara girder is provided, so that walking vibration generated by walking when going up and down stairs is generated. It is suppressed and can be safely raised and lowered.
Since the vibration sensor of the vibration damping system is arranged on the tread plate supported almost in the center of the longitudinal direction of the Sasara girder, walking vibration can be detected accurately and quickly, and the actuator is a flat L-shaped steel material. Since it is attached to the lower surface of the end portion, the actuator can be easily and easily attached to the Sasara girder side.
The wiring for the vibration damping system, that is, the wiring that connects the vibration sensor arranged on the tread plate located in the center of the longitudinal direction of the Sasara girder and the actuator arranged at the end of the Sasara girder, is the wiring of the Sasara girder. Since it is placed in the internal wiring space, it can be safely placed so that it cannot be seen from the outside.

Schematic side view of staircase structure Longitudinal front view of the main part of the staircase structure Longitudinal side view of the main part of the staircase structure Longitudinal front view of the main part showing a comparative example of the staircase structure

An embodiment of the staircase structure according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the staircase structure of the present invention has a plurality of steps arranged between a pair of left and right steel sasara girders 1 and the pair of sasara girders 1 and supported by the sasara girder 1. It includes a tread plate 4 and a handrail 6 which is arranged above each sasara girder 1 and is supported by each sasara girder 1 via a handrail support member 5.
Each Sasara girder 1 includes a lower portion 1a supported by the lower floor skeleton D, an upper portion 1b supported by the upper floor skeleton U, and an intermediate portion 1c connecting both portions 1a and 1b. Then, by making the lower portion 1a and the upper portion 1b horizontal and supporting them on the skeletons D and U, the intermediate portion 1c is installed at a predetermined inclination angle from the floor DF on the lower floor to the floor UF on the upper floor. Is set to be done.

As shown in FIG. 2, the lower portion 1a, the upper portion 1b, and the intermediate portion 1c constituting each Sasara girder 1 are L-shaped cross sections formed by cutting a part of one side of a commercially available angle steel. It is configured by tap welding a shaped steel material 2 and a commercially available flat steel (flat bar) 3 which is an example of a flat steel material, and its cross-sectional shape is formed into a vertically long, upwardly open and hollow U-shape. .. Then, each sasara girder 1 is formed by welding the lower portion 1a, the upper portion 1b, and the intermediate portion 1c in a state having a predetermined angle, and the pair of sasara girders 1 insert the L-shaped steel material 2 inside. The flat steel 3 is arranged so as to be located on the outside.
The multi-stage tread plate 4 is composed of, for example, a steel material and concrete placed on the steel material, is arranged along the intermediate portion 1c of the sasara girder 1 as shown in FIG. 1, and is arranged along the intermediate portion 1c of the sasara girder 1, as shown in FIG. It is located inside the L-shaped steel material 2 and is arranged between the L-shaped steel materials 2 and the steel material is welded to and supported by the L-shaped steel material 2.

The handrail support material 5 is made of a transparent glass plate, and the handrail 6 is arranged at the upper end portion thereof, and the lower end portion thereof is inside from the upper opening of the U-shaped Sasara girder 1 as shown in FIG. It is inserted into the space and placed on the support bracket 7 disposed in the space. At that time, although not shown, it is placed on the support bracket 7 via a grating channel or the like as needed, and a filler or the like is filled between the sasara girder 1 and the handrail support member 5 to support the support. The support bracket 7 is made of, for example, a flat steel material, and is supported by being welded to the flat steel 3 or the L-shaped steel material 2 with a wiring space 8 secured below the support bracket 7, and the inside of the wiring space 8 is controlled. Wiring for the vibration system 9 and the like are arranged.
The vibration damping system 9 suppresses the walking vibration generated by walking when going up and down a staircase to enable safe ascent and descent, and the vibration sensor 10 for detecting the vibration of the Sasara girder 1 and the information from the vibration sensor 10. An actuator 11 made of a film-type piezoelectric ceramics that applies vibration of opposite phase to the Sasara girder 1 is provided, and the wiring 12 for the vibration damping system 9 connecting the vibration sensor 10 and the actuator 11 is inside the wiring space 8. Is placed in.

As shown in FIG. 1, the vibration sensor 10 constituting the vibration damping system 9 is arranged on a tread plate 4 supported substantially in the center in the longitudinal direction of the Sasara girder 1, and further, as shown in FIG. 2, the tread plate is provided. It is buried in concrete almost in the center of 4 in the left-right direction. Then, the wiring 12 from the vibration sensor 10 is embedded in the concrete of the tread plate 4 and is arranged inside the wiring space 8 through the through hole of the opening in the L-shaped steel material 2.
On the other hand, as shown in FIGS. 1 and 3, two actuators 11 made of film-type piezoelectric ceramics are arranged on the left and right between the lower portion 1a of the sasara girder 1 and the skeleton D of the lower floor. , As shown in FIG. 1, two pieces are arranged on the left and right between the upper portion 1b of the Sasara girder 1 and the skeleton U on the upper floor. That is, a total of four actuators 11 made of film-type piezoelectric ceramics are arranged, and each actuator 11 is an L-shaped steel material 2 constituting the lower portion 1a or the upper portion 1b of the sasara girder 1 on the side of the sasara girder 1. It is attached to the lower surface and is arranged on the back side of the wall material 13.

When the actuator 11 made of film-type piezoelectric ceramics vibrates in the sasara girder 1 due to walking, the lower surface of the lower portion 1a and the upper portion 1b of the sasara girder 1 and the lower layer skeleton D and the upper floor skeleton U By expanding and contracting, a rotational moment about the axis along the width direction of the Sasara girder 1 is added to the lower part 1a and the upper part 1b of the Sasara girder 1, and vibration of the opposite phase is given to the Sasara girder 1. be. Therefore, the pair of left and right Sasara girders 1 are supported in a state of being relatively rotatable within a certain range with respect to the lower floor skeleton D and the upper floor skeleton U.
Then, when walking vibrates in the Sasara girder 1 when going up and down the stairs, the actuator 11 made of each film type piezoelectric ceramic expands and contracts appropriately based on the information from the vibration sensor 10, and the phase is opposite to that of the Sasara girder 1. Vibration is applied to suppress the vibration of the Sasara girder 1.

As described in detail above, in the present invention, the Sasara girder 1 is configured by tap welding the L-shaped steel material 2 and the flat steel 3 having an L-shaped cross section, so that the effective cutting required with a relatively small amount of welding is required. The Sasara girder 1 having an area can be configured.
That is, when a U-shaped sasara girder is made of steel, for example, as shown in FIG. 4A, all of the pair of left and right side plates 2a and 3 and the bottom plate 2b connecting the bottoms of the side plates 2a and 3 are connected. It is also possible to construct it by using steel plate materials and tap-welding them. However, in that case, the amount of welding increases and the required effective cross-sectional area is secured only by the inner side plate 2a, so that the effective cross-sectional area becomes relatively small and an attempt is made to secure the effective cross-sectional area. Then, it is necessary to increase the growth of the Sasara girder.
Further, as shown in FIG. 4B, it is also possible to provide a groove in the bottom plate 2b and continuously weld it to the inner side plate 2a over the entire length thereof. However, in that case, although the effective cross-sectional area can be secured, the welding amount becomes extremely large.
In that respect, when the L-shaped steel material 2 and the flat steel 3 are used, the welding amount is small and the effective cross-sectional area is relatively large, so that the formation of the sasara girder can be reduced accordingly.

[Another Embodiment]
(1) In the above embodiment, an example is shown in which a part of one side of a commercially available angle steel is cut off for the L-shaped steel material 2, but in addition, a commercially available T-shaped steel, a channel steel, or the like is used. As for the flat steel material, in addition to the commercially available flat steel 3, for example, a commercially available flat steel or various shaped steels can be cut and configured.
Further, regarding the handrail support material 5, an example in which a transparent glass plate is used is shown, but in addition, a semi-transparent glass plate, a transparent or semi-transparent acrylic plate, and a plurality of rod materials are used. Is also possible.

(2) In the above embodiment, an example in which the vibration damping system 9 is provided in order to suppress the walking vibration of the Sasara girder 1 is shown, but when the walking vibration does not occur so much in the Sasara girder 1, the vibration damping system 9 is shown. It is also possible to carry out without providing the system 9. In that case, wirings that need to be laid along the stairs, such as wiring for signal transmission of various safety devices and alarm devices and wiring for power supply, will be arranged in the wiring space 8.
Further, it is possible to eliminate the wiring space 8, and in that case, when the handrail support member 5 is supported by the sasara girder 1, the lower end portion of the handrail support member 5 is directly supported by the bottom portion of the sasara girder 1. It is also possible to support.

(3) In the above embodiment, an example in which the actuator 11 made of film-type piezoelectric ceramics is used as the actuator for applying vibration to the Sasara girder 1 is shown, but in addition, various actuators such as hydraulic type and electromagnetic type are used. be able to. Further, the actuator 11 can be attached only to the upper and lower end portions of one of the pair of left and right sasara girders 1, or can be attached to only one of the upper and lower end portions. be.

1 Sasara girder 2 L-shaped steel material 3 Flat steel material 4 Tread plate 5 Handrail support material 6 Handrail 7 Support bracket 8 Wiring space 9 Vibration control system 10 Vibration sensor 11 Actuator 12 Wiring for vibration control system

Claims (4)

A pair of left and right steel sasara girders, a multi-stage tread plate arranged between the pair of sasara girders and supported by the sasara girder, and a handrail support material arranged above the sasara girder. It is a staircase structure equipped with a handrail supported by the Sasara girder.
The sasara girder is formed by welding an L-shaped steel material having an L-shaped cross section and a flat steel material having a flat plate shape, and the cross-sectional shape is formed in a vertically long, upwardly open and hollow U-shape, and the tread plate is formed. A staircase structure that is supported by the L-shaped steel material of the Sasara girder, the handrail support material is inserted into the internal space of the Sasara girder from the upper opening of the Sasara girder, and is supported by the Sasara girder in the space. .. The staircase structure according to claim 1, wherein the L-shaped steel material of the Sasara girder is made of angle steel obtained by cutting a part of one side thereof. A support bracket for supporting the handrail support material is arranged in the internal space of the Sasara girder in a state where a wiring space is secured below the support bracket, and the lower end portion of the handrail support material is supported by the support bracket. The staircase structure according to claim 1 or 2. A vibration damping system including a vibration sensor that detects the vibration of the Sasara girder and an actuator that applies vibration of the opposite phase to the Sasara girder based on the information from the vibration sensor is provided, and the vibration sensor is the Sasara girder. The actuator is attached to the lower surface of the end portion of the L-shaped steel material constituting the Sasara girder, and the wiring for the vibration damping system is the wiring. The staircase structure according to claim 3, which is arranged in the space.

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