JP2015052249A - Step floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a step floor structure capable of easily switching a step floor and a stepless space with a simple structure.SOLUTION: The step floor structure 1A comprises a floor surface 13 of a plurality of steps 11, 11, etc. formed so a to become high in a stairs shape toward the rear side from the front side in the longitudinal direction, and arranges a seating part 32 of a chair 3 above the floor surface 13, and is provided with an auxiliary floor member 2 detachably provided in a part (one part) 14 of becoming the rear side of a switchable floor surface (a floor surface) 13A on the switchable floor surface 13A of at least one step 11 of the floor surface 13 of the plurality of steps 11, 11, etc, and forming an auxiliary floor surface 2b for arranging the foot side when using the seating part 32 of the chair 3 arranged above the switchable floor surface 13A, and a height h3 up to the auxiliary floor surface 2b from a seat surface 32a in the seating part 32 of the chair 3 corresponding to the auxiliary floor member 2, is substantially equal to a height up to a corresponding floor surface 13 from the seat surface 32a in the seating part 32 if the chair 3 in a place with no auxiliary floor member 2.

Description

  The present invention relates to a stepped floor structure that rises stepwise from the front side to the rear side that is constructed in a viewing facility such as a theater or a hall.

2. Description of the Related Art Conventionally, there has been known a stepped floor forming apparatus capable of switching the floor of a viewing facility such as a theater or a hall to a stepped floor state that increases stepwise from the front side to the rear side and a flat field state without steps. ing.
For example, in Patent Document 1, a plurality of auxiliary floor members forming a corrugated floor are accommodated below the stage part, and the auxiliary floor members are projected by a sliding mechanism provided on the floor of a theater. A corrugated floor forming apparatus capable of forming corrugated floors in a flat place is disclosed.
Patent Document 2 discloses a stepped floor forming apparatus in which a plurality of auxiliary floor members forming a stepped floor are movable in the front-rear direction, and are stacked in the up-down direction when forming a flat field.
Further, in Patent Document 3, a plurality of auxiliary floor members forming a corrugated floor are accommodated below a floor portion in a flat state, and are lifted up by lifting means such as a jack. A corrugated floor forming apparatus capable of forming corrugated floors is disclosed.

In addition, a floor forming device that can make a predetermined space flat, and a chair for a spectator seat are known so that a wheelchair user can easily use even if a corrugated floor is formed (for example, Patent Documents). 4, 5).
For example, in Patent Document 4, a step space immediately below the passage can be raised to the height of the passage, and a step space immediately below the passage can be raised to the height of the passage to thereby form a flat space having a predetermined width. Is disclosed.
Further, in Patent Document 5, a part of a plurality of chairs mounted on a corrugated floor is configured to be rotatable to the back of other chairs, and some of the chairs are rotated to the back of other chairs. Thus, a chair for a bleacher seat is disclosed in which a flat space having a predetermined area without a chair is secured.

Japanese Patent Publication No. 05-000503 Utility Model Registration No. 2522368 Japanese Patent No. 2787226 Japanese Patent No. 4153437 Japanese Patent Laid-Open No. 11-244083

However, the step forming apparatus disclosed in Patent Documents 1 to 4 has a problem that the mechanism for moving the auxiliary floor member is complicated, and switching between the step floor and the flat floor becomes large and costly.
Moreover, since power is often used for the mechanism for moving the auxiliary floor member, there is also a problem that installation cost and running cost are required. For this reason, the corrugated floor forming apparatus disclosed in Patent Documents 1 to 4 has a problem that it is not suitable for a small-scale facility with a small number of people.
Moreover, in the chair for the bleacher seat disclosed by the cited reference 5, the structure where some chairs rotate to the back of other chairs requires a space for the chairs to rotate, and the number of chairs installed is large. There is a problem of fewer. In addition, since the space in the front-rear direction of the chair is increased by securing a space for the chair to rotate, for example, it is difficult to see the viewing object such as the stage when sitting on the chair provided immediately behind the passage There is also.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a stepped floor structure that has a simple structure and can easily switch between a stepped floor and a space without a step.

  In order to achieve the above object, a stepped floor structure according to the present invention has a plurality of stepped floors formed so as to increase stepwise from the front side in the front-rear direction to the rear side, and above the floor surface. The chair is provided in a stepped floor structure in which a seating portion of the chair is disposed, and is provided on at least one of the plurality of floors in a detachable manner on a part of the floor, and is disposed above the floor. When using the seating portion of the chair, there is provided an auxiliary floor member that forms an auxiliary floor surface on which a foot is arranged, and the height from the seating surface in the seating portion of the chair corresponding to the auxiliary floor member to the auxiliary floor surface Is substantially equal to the height from the seating surface of the seating portion of the chair at the location where the auxiliary floor member is not provided to the corresponding floor surface.

In the present invention, an auxiliary floor member is attached to a part of the floor surface on at least one of the plurality of floor surfaces, whereby a floor can be formed on the floor surface, and the auxiliary floor member is removed from the floor surface. As a result, a stepless space can be formed on the floor surface. And, by attaching the auxiliary floor member to the floor surface or removing the auxiliary floor member from the floor surface, it is possible to switch between the stepped floor and the stepless space, so the structure is simple and the stepped floor and the stepless space Can be easily switched.
A stepless space formed by removing the auxiliary floor member from the floor surface can be used as a space for wheelchair users, a space for installing equipment, or the like.
Further, the height from the seating surface to the auxiliary floor surface in the seating portion of the chair corresponding to the auxiliary floor member is the height from the seating surface in the seating portion of the chair to the corresponding floor surface in a place where the auxiliary floor member is not provided. Even if the auxiliary floor member is installed to form a stepped floor, or the auxiliary floor member is removed to form a stepless space, the seat surface of the chair is held at a predetermined height. Therefore, the user sitting on the chair can see the front side well.

In the stepped floor structure according to the present invention, it is preferable that the chair corresponding to the auxiliary floor member is configured to be detachable from a floor surface provided with the corresponding auxiliary floor member.
By doing in this way, by removing the auxiliary floor member from the floor and removing the chair, a flat place without steps and chairs is formed, so this flat place can be used as a space for wheelchair users, It can be used as a space for installation or for multiple purposes.

Further, in the stepped floor structure according to the present invention, the auxiliary floor member may be configured to be fixable to the corresponding chair.
By doing in this way, it can prevent that a chair and an auxiliary floor member shift in position.

In the stepped floor structure according to the present invention, one auxiliary floor member may be provided for one chair.
By doing in this way, only a required part can be made into a stepped floor or a space without a step by installing or removing an auxiliary floor member for every chair as needed.

In the stepped floor structure according to the present invention, one auxiliary floor member may be provided for the plurality of chairs arranged in the left-right direction intersecting the front-rear direction.
By doing in this way, the part in which the several chairs arranged in the left-right direction are installed can be made into a stepped floor or a stepless space at a time, and the switching between the stepped floor and the flat floor can be easily performed. be able to.

In the stepped floor structure according to the present invention, it is preferable that a plurality of the auxiliary floor members are arranged in the left-right direction, and the auxiliary floor members adjacent in the left-right direction can be connected by connecting means.
By doing in this way, since an adjacent auxiliary floor member is connected reliably, a gap is made between adjacent auxiliary floor members, and it is possible to prevent a foot from being caught in this gap or an object from falling. It is possible to prevent the adjacent auxiliary floor member from being displaced.

Further, in the stepped floor structure according to the present invention, the chair has a leg portion that supports the seat portion,
The auxiliary floor member is preferably formed with a fitting groove into which the leg portion can be fitted.
By doing in this way, if the fitting groove | channel of an auxiliary floor member is fitted to the leg part of the chair attached to the floor surface, since an auxiliary floor member will be installed in a normal position with respect to a floor surface and a chair. The positioning of the auxiliary floor member can be easily performed, and the auxiliary floor member can be easily installed.

In the stepped floor structure according to the present invention, the chair preferably has a caster for traveling on the corresponding floor surface.
By doing in this way, a chair can be moved easily.

Moreover, in the step floor structure which concerns on this invention, the said auxiliary floor member may be provided in the part used as the back side of the said floor surface in at least 1 step | paragraph of the said multiple floor surfaces.
By doing in this way, it can be set as the corrugated floor from which the part which becomes a rear side becomes higher than the part which becomes a front side.

Further, in the stepped floor structure according to the present invention, a portion that is the front side of the floor surface in at least one of the plurality of floor surfaces forms a passage, and an auxiliary floor member is provided on the portion that is the rear side of the floor surface. May be provided.
By doing in this way, if the auxiliary floor member and the chair are removed from the floor surface, a space having the same height as the passage is formed, so that this space can be used for a wheelchair user, for example. .

Moreover, in the step floor structure which concerns on this invention, the auxiliary floor member may be provided in the last step of the said floor surface of the said plurality of steps.
By doing in this way, if an auxiliary floor member and a chair are removed from the floor surface, a space is formed at the last stage, so this space can be used as a space for installing equipment such as a camera.

According to the present invention, by attaching an auxiliary floor member to a part of the floor surface in at least one of the plurality of floor surfaces, a step floor can be formed on the floor surface. By removing from the floor, a stepless space on the floor surface can be formed. And, by attaching the auxiliary floor member to the floor surface or removing the auxiliary floor member from the floor surface, it is possible to switch between the stepped floor and the stepless space, so the structure is simple and the stepped floor and the stepless space Can be easily switched.
A stepless space formed by removing the auxiliary floor member from the floor surface can be used as a space for wheelchair users, a space for installing equipment, or the like.
Further, the height from the seating surface to the auxiliary floor surface in the seating portion of the chair corresponding to the auxiliary floor member is the height from the seating surface in the seating portion of the chair to the corresponding floor surface in a place where the auxiliary floor member is not provided. Even if the auxiliary floor member is installed to form a stepped floor, or the auxiliary floor member is removed to form a stepless space, the seat surface of the chair is held at a predetermined height. Therefore, the user sitting on the chair can see the front side well.

It is a perspective view which shows an example of the step floor structure by 1st Embodiment of this invention. It is an A direction arrow directional view of FIG. It is a figure explaining attachment and detachment to the floor surface of an auxiliary floor member. It is a figure explaining a connection means. It is a perspective view which shows an example of the step floor structure by 2nd Embodiment. It is a side view which shows an example of the step floor structure by 3rd Embodiment. It is a figure which shows a mode that the auxiliary floor member and the chair in 3rd Embodiment were removed. It is a side view which shows an example of the step floor structure by 4th Embodiment. It is a figure explaining the metal fitting for fixation of an auxiliary floor member. (A), (b) is a figure which shows the other form of a chair.

(First embodiment)
Hereinafter, a stepped floor structure according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1, the stepped floor structure 1 </ b> A according to the first embodiment is a step that increases stepwise from the front side to the rear side (in the direction of arrow B in the figure) in a viewing facility such as a theater or a hall. In the structure of the floor, a plurality of steps 11, 11... Are formed in a substantially rectangular parallelepiped shape in a part 14 on the rear side of the floor surface 13 A (13) in a part of the steps 11 A (11), Two auxiliary floor members 2, 2 arranged in the direction of arrow C) are detachably provided.

The auxiliary floor member 2 is formed such that its height h1 is substantially equal to the height h2 of the steps 11B (11) other than some of the steps 11A.
When the auxiliary floor member 2 is attached to the floor surface 13A of some of the steps 11A, a step floor is formed, and when removed from the floor surface 13A of some of the steps 11A, a stepless space is formed.
As described above, the floor surface 13A of a part of the steps A can be switched between a stepped floor and a space without a step, and therefore will be described as a switchable floor surface 13A.
Further, the state in which the auxiliary floor member 2 is removed from the switchable floor surface 13A is defined as a stepless space, and the chair 3 (to be described later) from the switchable floor surface 13A from which the auxiliary floor member 2 is removed out of the stepless space. ) Will be described below as a flat field.

  In the first embodiment, the switchable floor 13 </ b> A has a passage 12 extending in the left-right direction (in the direction of arrow C in the drawing) formed in a front portion 15, and a rear portion 14 of the passage 12. The auxiliary floor members 2 and 2 are detachably provided.

Further, on the floor surface 13 of the steps 11, 11,. Of these viewing chairs 3, the chair 3 provided on the switchable floor 13 </ b> A is detachably provided on the switchable floor 13 </ b> A, and is provided on a place other than the switchable floor 13 </ b> A. (Not shown) is fixed to the floor surface 13.
The chair 3 includes a plurality of leg portions 31, 31... Arranged at a predetermined interval in the left-right direction C, and seating portions 32, 32. And backrest portions 33, 33 ... provided above the seat portions 32, 32 ... and armrest portions 34, 34 ... provided on the upper portions of the leg portions 31, 31 ..., respectively.

  As shown in FIGS. 2 and 3, the chair 3 provided on the switchable floor surface 13A is connected to a detachable member 35 whose leg portions 31, 31... Can be attached to and detached from the switchable floor surface 13A. . The detachable member 35 is provided with a locking portion 36 that can be locked to the switchable floor surface 13A, and a caster 37 that can travel on the switchable floor surface 13A. For example, the locking portion 36 is configured to be locked to the switchable floor surface 13A by being fixed to the switchable floor surface 13A with a fastener (not shown) such as a screw.

  When the chair 3 provided on such a switchable floor surface 13A is attached to the switchable floor surface 13A, the caster 37 is separated upward from the switchable floor surface 13A and the locking portion 36 is switchable. When locked to the switchable floor surface 13A by being locked to the surface 13A and removed from the switchable floor surface 13A, the locking between the locking portion 36 and the switchable floor surface 13A is released and the caster 37 is released. Is configured to be able to travel on the switchable floor surface 13A by contacting the switchable floor surface 13A.

  Further, as shown in FIGS. 1 to 3, the auxiliary floor member 2 is formed with a fitting groove 21 into which the leg portion 31 of the chair 3 can be fitted in the rear end portion 2a. And the auxiliary floor member 2 is installed in the normal position by being attached to the switchable floor surface 13A so that the leg part 31 of the chair 3 fits into the fitting groove 21.

Further, as shown in FIG. 4, the auxiliary floor members 2 and 2 adjacent to each other in the left-right direction C are connected by a connecting means 4.
The connecting means 4 includes a protruding portion 41 provided on one auxiliary floor member 2A (2) of the adjacent auxiliary floor members 2 and 2 and protruding toward the other auxiliary floor member 2B (2), and the other auxiliary floor member. 2B and an insertion portion 42 into which the protruding portion 41 of one auxiliary floor member 2A can be inserted. Then, when the one auxiliary floor member 2A and the other auxiliary floor member 2B are respectively arranged in the normal position, the protruding portion 41 of the one auxiliary floor member 2A is inserted into the insertion portion 42 of the other auxiliary floor member 2B. The protruding portion 41 and the insertion portion 42 are fitted to each other, and one auxiliary floor member 2A and the other auxiliary floor member 2B are connected.

Returning to FIG. 1 to FIG. 3, the auxiliary floor member 2 is configured such that when the switchable floor surface 13 </ b> A is attached, the seat portion 32 of the chair 3 is disposed above. At this time, the upper surface 2b of the auxiliary floor member 2 forms the auxiliary floor surface 2b on which the feet are arranged when the chair 3 is used.
The height (h3) from the auxiliary floor 2b to the seat 32a of the seat 32 of the chair 3 is from the floor 13 other than the switchable floor 13A to the seat 32a of the seat 32 of the chair 3 above it. The height is approximately the same as the height (not shown).

Next, a method for switching between the stepped floor of the switchable floor 13A and the flat floor will be described.
First, when the switchable floor surface 13A is a corrugated floor, the auxiliary floor member 2 is attached to the switchable floor surface 13A. At this time, the leg portion 31 of the chair 3 is fitted into the fitting groove 21 of the auxiliary floor member 2. Further, the protruding portion 41 of the connecting means 4 of one auxiliary floor member 2A of the auxiliary floor members 2 and 2 adjacent in the left-right direction C is inserted into the insertion portion 42 of the connecting means 4 of the other auxiliary floor member 2B, The protrusion 41 and the insertion part 42 are fitted to each other, and the adjacent auxiliary floor members 2 and 2 are connected to each other. By doing so, a stepped floor is formed on the switchable floor 13A. The auxiliary floor member 2 is configured to be fixable to a switchable floor surface 13A with a fastener such as a screw.

Further, when the switchable floor surface 13A is a flat floor, the connection between the auxiliary floor members 2 and 2 adjacent to each other in the left-right direction C is released, and the auxiliary floor members 2 and 2 are moved to the front of the chair 3 to be switched. Remove from surface 13A. Thereby, a stepless space is formed on the switchable floor surface 13A.
Subsequently, the latching portion 36 of the chair 3 and the switchable floor surface 13A are unlocked, brought into contact with the caster 37 and the switchable floor surface 13A, and the chair 3 is moved and removed from the switchable floor surface 13A. . By doing in this way, the step 11A and the chair 3 are eliminated, and a flat field is formed on the switchable floor surface 13A.

Next, actions and effects of the stepped floor structure 1A according to the first embodiment will be described with reference to the drawings.
In the stepped floor structure 1A according to the first embodiment described above, the switchable floor surface can be switched by attaching the auxiliary floor member 2 to the rear portion 14 of the switchable floor surface 13A in which the passage 12 is formed in the front portion 15. A stepped floor is formed on 13A, and a space without a step can be formed on the switchable floor surface 13A by removing the auxiliary floor member 2 from the switchable floor surface 13A. And the auxiliary | assistant floor member 2 is attached to the switchable floor surface 13A, or the auxiliary | assistant floor member 2 is removed from the switchable floor surface 13A, and the switchable floor surface 13A can be switched to a stepped floor and a space without a step. Therefore, the structure is simple, and the space between the stepped floor and the stepless space can be easily switched.

  The height h3 from the auxiliary floor surface 2b of the auxiliary floor member 2 to the seat surface 32a of the chair 3 is substantially equal to the height from the floor surface 13 other than the switchable floor surface 13A to the seat surface 32a of the chair 3 above it. The seating surface 32a of the chair 3 is kept at a predetermined height even when the auxiliary floor member 2 is installed to form a stepped floor or when the auxiliary floor member 2 is removed to form a stepless space. Therefore, the seated user can see the front side well.

In addition, since the chair 3 is detachable from the switchable floor surface 13A, the flat floor without the chair 3 is formed by removing the auxiliary floor member 2 and the chair 3 from the switchable floor surface 13A. Can be used as a space for wheelchair users, a space for installing devices such as cameras, etc.
The auxiliary floor member 2 is removed and only some of the chairs 3 are removed, and the wheelchair user places the wheelchair in the space from which the chairs 3 are removed, and the chair 3 is fixed to the switchable floor 13A. You may make it sit down. Even in such a case, since the seat surface 32a of the chair 3 is held at a predetermined height, the seated user can visually recognize the front well.

Further, since the auxiliary floor members 2 and 2 adjacent in the left-right direction C can be connected by the connecting means 4, the adjacent auxiliary floor members 2 and 2 are reliably connected to each other. A gap can be formed between the two, and it is possible to prevent a foot from being caught in the gap or an object from falling, and it is possible to prevent the adjacent auxiliary floor members 2 and 2 from being displaced.
Further, the auxiliary floor member 2 is formed with a fitting groove 21 into which the leg 31 of the chair 3 can be fitted, whereby the leg 31 of the chair 3 fixed to the switchable floor surface 13A and the auxiliary floor member. If the two fitting grooves 21 are fitted, the auxiliary floor member 2 is installed at the normal position with respect to the switchable floor surface 13A and the chair 3, so that the auxiliary floor member 2 can be easily aligned. The auxiliary floor member 2 can be easily attached to the floor surface 13A.
Moreover, the chair 3 can be moved easily by having the caster 37 for driving | running | working on the switchable floor 13A.

  Next, other embodiments will be described with reference to the accompanying drawings, but the same or similar members and parts as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted. A different configuration will be described.

(Second Embodiment)
As shown in FIG. 5, the step floor structure 1B according to the second embodiment includes a switchable floor surface 13B in which the last floor surface of the step floors constitutes a switchable floor surface 13B. When the auxiliary floor member 2 is attached to 14, the switchable floor surface 13B becomes a stepped floor, and when the auxiliary floor member 2 is removed from the switchable floor surface 13B, the switchable floor surface 13B becomes a stepless space. Has been.

Moreover, in 2nd Embodiment, the chair (not shown) is provided in the part 14 used as the back side of the switchable floor 13B, and the part 15 used as the front side so that attachment or detachment is possible. When the auxiliary floor member 2 and the chair 3 are removed from the switchable floor surface 13B, a flat field without the steps and the chairs 3 is formed on the switchable floor surface 13B.
The switchable floor 13B that has become a flat place can be used as a space for installing equipment such as a camera, for example.
For this reason, in the second embodiment, when a switchable floor surface 13B is used as a flat field and equipment such as a camera is installed as usual and it is desired to increase the audience seats, the auxiliary floor member is provided on the switchable floor surface 13B. 2 and a chair 3 are preferably attached.

  According to the step-floor structure 1B by 2nd Embodiment, there exists an effect similar to 1st Embodiment.

(Third embodiment)
As shown in FIG. 6, in the stepped floor structure 1C according to the third embodiment, two consecutive floor surfaces of the stepped floor constitute the switchable floor surfaces 13C and 13C, respectively, and the switchable floor surfaces 13C and 13C. The auxiliary floor member 2 is detachably provided on the rear portion 14.
The rear portion 14 and the front portion 15 of the switchable floor surface 13C are formed so that the lengths in the front-rear direction B are substantially the same. Moreover, the chair 3 is provided in the part 14 used as the back side of the switchable floor surface 13C, and the part 15 used as the front side so that attachment or detachment is possible respectively.

In 3rd Embodiment, as shown in FIG. 6, when the auxiliary floor member 2 and the chair 3 are each installed in two switchable floor surfaces 13C and 13C, a corrugated floor will be formed and it will be from a front side to a rear side. Since the seating surface 32a of the chair 3 becomes higher, the user can view the front side satisfactorily while sitting on the chair 32.
Moreover, as shown in FIG. 7, when the auxiliary floor member 2 and the chair 3 of one switchable floor surface 11Ca are removed, the switchable floor surface 13Ca becomes a flat place without the chair 3, and the user stands upright. It can be a space for viewing the front.

In addition, also on the other switchable floor 13Cb, the auxiliary floor member 2 and the chair 3 may be removed and the front may be viewed with the user standing.
Moreover, the fall prevention member 16 such as a fall prevention bar or a fence for preventing a user on the floor immediately above the switchable floor 13C that has become a flat place from falling downward is switched to a flat place. It may be detachably provided in the vicinity of the boundary between the possible floor surface 11C and the floor surface immediately above it.

(Fourth embodiment)
As shown in FIG. 8, the stepped floor structure 1 </ b> D according to the fourth embodiment has the auxiliary floor member 2 detachably provided on the front side 15 in the front-rear direction of the switchable floor surface 13 </ b> D, and is on the rear side. A passage 12 is formed in the portion 14. In addition, in 4th Embodiment, although the floor surface is also formed ahead of the part 15 used as the front side, it is set as the floor surface 11D which can switch back from the part which the auxiliary floor member 2 can attach or detach, and the auxiliary floor member 2 is The removable part is referred to as a front part 15.

  In the fourth embodiment, by removing the auxiliary floor member 2 and the chair 3 from the switchable floor surface 13D, a space is created on the front side of the passage 12, so that this space is, for example, a space for a wheelchair user. Can do.

As mentioned above, although the embodiment of the corrugated floor structure by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the first embodiment, the switchable floor surface 13A is provided at a position where the passage 12 can be formed in the front portion 15 thereof. In the second embodiment, the switchable floor surface 13B is Although provided in the last stage, the position where the switchable floor surfaces 13A and 13B are provided may be arbitrarily set.
Further, the number of auxiliary floor members 2 provided on the switchable floor surfaces 13A and 13B may be arbitrarily set. One auxiliary floor member 2 may be provided for one chair 3, or one auxiliary floor member 2 may be provided for a plurality of chairs 3. The shape of the auxiliary floor member 2 is arbitrary. May be set.
In the above embodiment, the auxiliary floor member 2 is detachably provided on either the rear portion 14 or the front portion 15 of the switchable floor surface 13A. The portion to be provided may be arbitrarily set, and the auxiliary floor member 2 may be provided at an intermediate portion in the front-rear direction B of the switchable floor surface 13A.
Further, in the above embodiment, the auxiliary floor member 2 is configured to be fixed to the switchable floor surface 13A with a fastener such as a screw, but may be configured not to be fixed to the switchable floor surface 13A.
The auxiliary floor member 2 may be configured to be fixable to the chair 3 in place of the switchable floor surface 13A. For example, as shown in FIG. 9, the fixing bracket 22 is attached to the fitting groove 21 of the auxiliary floor member 2 so as to correspond to the leg portion 31 of the chair 3, and the fixing bracket 22 and the leg portion 31 are connected to each other. You may enable it to fix with fasteners (not shown), such as a screw.
The auxiliary floor member 2 may be fixed to both the switchable floor surface 13A and the chair 3 when provided on the switchable floor surface 13A.
Further, in the above embodiment, the auxiliary floor member 2 is provided with the connecting means, and the auxiliary floor member 2 adjacent in the left-right direction C is connected by the connecting means 4, but the connecting means 4 is connected to the auxiliary floor member 2. May not be provided. Moreover, the form of the connection means 4 which connects the adjacent auxiliary floor members 2 and 2 may be set arbitrarily.
Moreover, in said embodiment, although the chair 3 is provided with the caster for driving | running | working the switchable floor surfaces 13A and 13B, the caster 37 does not need to be provided.
In the embodiment described above, the chair 3 is provided with the leg portion 31 and the seating portion 32 at the upper portion of the same step 11, but as shown in FIG. 10A, at the upper portion of the rear step 11C. The chair 3 may be provided with the leg portion 31 and the seat portion 32 is arranged on the upper portion of the front step 11D. As shown in FIG. 10B, the seat portion 32 is provided on the front surface of the rear step 11C. It is good also as the chair 3 which is directly attached and this seating part 32 is distribute | arranged to the upper part of the front step 11D.

1A, 1B, 1C, 1D Stepped floor structure 2 Auxiliary floor member 2b Auxiliary floor surface 3 Chair 4 Connecting means 11 steps 12 Passage 13 Floor surface 13A, 13B, 13C, 13D Switchable floor surface 14 Rear side portion 15 Front side Part 21 fitting groove 22 fixing bracket 31 leg 32 seating part 32a seating surface 37 caster

Claims (11)

A stepped floor structure having a plurality of floor surfaces formed so as to increase stepwise from the front side to the rear side in the front-rear direction, and a seating portion of the chair is disposed above the floor surface,
An auxiliary floor surface on which at least one step of the plurality of floor surfaces is detachably provided on a part of the floor surface, and a foot is disposed when using the seating portion of the chair disposed above the floor surface. An auxiliary floor member forming
The height from the seating surface in the seating portion of the chair corresponding to the auxiliary floor member to the auxiliary floor surface corresponds to the height from the seating surface in the seating portion of the chair at a location where the auxiliary floor member is not provided. A corrugated floor structure characterized by being approximately equal to the height to the floor.   The corrugated floor structure according to claim 1, wherein the chair corresponding to the auxiliary floor member is configured to be detachable from a floor surface on which the corresponding auxiliary floor member is provided.   The corrugated floor structure according to claim 1, wherein the auxiliary floor member is configured to be fixable to the corresponding chair.   4. The step floor structure according to claim 1, wherein one auxiliary floor member is provided for one chair. 5.   The said auxiliary floor member is provided with respect to the said several chair arranged in the left-right direction which cross | intersects the said front-back direction, The stage of any one of Claim 1 thru | or 3 characterized by the above-mentioned. Floor structure.   6. The auxiliary floor member according to claim 1, wherein a plurality of the auxiliary floor members are arranged in the left-right direction, and the auxiliary floor members adjacent in the left-right direction can be connected by connecting means. Corrugated floor structure.   The said chair has a leg part which supports the said seating part, The fitting groove which can fit the said leg part is formed in the said auxiliary floor member, The Claim 6 characterized by the above-mentioned. Corrugated floor structure.   The said chair has the caster for driving | running | working on the said corresponding floor surface, The corrugated-floor structure of any one of the Claims 1 thru | or 7 characterized by the above-mentioned.   The said auxiliary floor member is provided in the part which becomes the back side of the said floor surface in at least one level of the said multiple floor surfaces, The corrugated floor of any one of Claim 1 thru | or 8 characterized by the above-mentioned. Construction. The portion that is the front side of the floor surface in at least one of the plurality of floor surfaces constitutes a passage,
The step floor structure according to claim 9, wherein an auxiliary floor member is provided at a portion on the rear side of the floor surface. The step floor structure according to any one of claims 1 to 10, wherein an auxiliary floor member is provided at the last step of the plurality of steps.

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