JP2020033721A - Multipurpose stadium - Google Patents

Abstract

To provide, for the purpose of solving the problems of the prior art, a multipurpose stadium in which the area of the venue can be changed in accordance with a game or an event to be held and which does not require a stage or arena seat on a field.SOLUTION: A multipurpose stadium of the present invention is a stadium having a field and an outer wall installed around the field. The outer wall has a structure including a fixed wall and a movable wall disposed to be opposite to each other with the field therebetween, and the movable wall is slidable in a direction substantially perpendicular (including the vertical direction) to the longitudinal direction thereof. When the movable wall is moved to a predetermined position so as to approach the fixed wall, a space for the event hall can be formed between the movable wall and the fixed wall.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a stadium that performs soccer, baseball, athletics, and the like, and more specifically, performs various events such as concerts and public gatherings in addition to sports that the stadium originally aims at, such as soccer. This is a technology related to a multipurpose stadium that can be used as an event venue.

  A stadium is a facility for playing a specific game or watching the game, and a baseball field, a soccer field, and the like are typical examples. However, the number of competitions (for example, the number of games) performed in the stadium is generally about several tens of times throughout the year, that is, there are not many stadiums that make a profit throughout the year.

  The Sports Agency, on the other hand, provides financial support for the development of stadium and arena development plans through public-private partnerships. We are promoting the maintenance of the facilities. In addition, the government has set a goal of nationwide development of multi-functional and complex stadiums and arenas by 2025, with an emphasis on the point of earning.

  Multipurpose stadiums that can be used for baseball, soccer, and concerts are extremely suitable for profitability because they can regularly provide opportunities to attract customers, and various proposals for multipurpose stadiums have been made. I have been. For example, in Patent Literature 1, a multipurpose stadium facility in which evacuation seats are arranged in addition to fixed seats and moving seats, the shape of the competition field can be changed, and the size (area) of the competition field is variable. Is proposed.

JP-A-07 / 091091

  The multipurpose stadium facilities disclosed in Patent Document 1 are provided with an evacuation seat or accommodated below a moving seat or the like, in other words, by increasing or decreasing the total number of seats according to the presence or absence of the evacuation seat. , To change the area of the competition field. However, even if the area of the competition field can be changed, it is not possible to change the area of the entire area (hereinafter, referred to as “venue area”) including the competition field and the stands (audience seats). For example, it is desirable that a concert mobilizing a medium or small number of spectators be performed in a space of a certain limited size both in terms of sound effects and for spectators to appreciate. However, if the venue area cannot be changed as in the multipurpose stadium facility disclosed in Patent Literature 1, a medium-sized or small-scale concert will have to be performed in an unnecessarily large space.

  In addition, the multipurpose stadium facility disclosed in Patent Document 1 can point out a problem that it is necessary to set up a stage and spectator seats (arena seats) on a field when performing an event such as a concert. That is, if the field is natural turf, the natural turf will be damaged each time an event such as a concert is performed, and the damaged natural turf must be treated each time.

  An object of the present invention is to solve the problems of the related art, that is, to provide a multipurpose stadium in which the size (area) of a venue area can be changed according to a competition or event to be held. . Another object of the present invention is to provide a multipurpose stadium in which there is no need to install a stage, arena seats, and the like on a field.

  The invention of the present application has been developed with a focus on the fact that a part of the outer peripheral wall constituting the multipurpose stadium has a slidable structure and that the field can also be slid. It is the invention made based on.

  The multipurpose stadium of the present invention is a stadium having a field and an outer wall provided around the field. Note that the outer wall has a structure including a fixed wall and a movable wall opposed to each other across the field, and the movable wall is slidable in a direction substantially perpendicular (including perpendicular) to the longitudinal direction. Then, when the movable wall moves to a predetermined position so as to approach the fixed wall, a space for an event venue can be formed between the movable wall and the fixed wall.

  The multipurpose stadium of the present invention may be provided with a slidable field. In this case, the field can be slid in the same direction as the moving direction of the movable wall. Then, when the movable wall moves to a predetermined position so as to approach the fixed wall and the field moves to a predetermined position so as to move away from the fixed wall, a space for the event venue where the field is removed can be formed.

  The multipurpose stadium of the present invention may be provided with a roof structure that covers the upper part of the seat stand. This roof structure has a roof body that rotates around a rotation axis (an axis arranged substantially parallel to the direction in which the seats are arranged), and a drive unit that rotates the roof body. In the roof, the rear end of the roof that is farther from the field is attached to the rotating shaft, and the front end of the roof closer to the field moves up and down with the rotation of the roof. When the roof rotates forward and the front end rises to a predetermined position, it enters the use state. When the roof rotates counterclockwise and the front end descends to the predetermined position, it enters the retracted state. In this case, the movable wall is configured to be slidable when the roof is in the retracted state.

The multipurpose stadium of the present invention has the following effects.
(1) When performing the intended game such as soccer or baseball, or when performing a large-scale concert, the venue area (competition field and stand) can be set wide. In doing so, the venue area can be reduced to a considerable extent. That is, the size of the venue area can be appropriately changed according to the competition or event to be held, and as a result, customers can be efficiently and effectively attracted.
(2) If the field can be slid, events such as concerts can be held without damaging the natural grass of the field.
(3) By providing a roof structure above the seat stand, the audience can be protected from rain and direct sunlight in use (when the roof body has risen to a predetermined position), and the storage state (when the roof body has fallen to a predetermined position) In this state, sunlight can be applied to the natural grass of the field for a long time.

The top view which shows typically the multipurpose stadium of this invention. The top view which shows typically the multipurpose stadium put into the event mode by moving a movable wall to a predetermined position. (A) A cross-sectional view of a multipurpose stadium where a movable wall passes, and (b) is a cross-sectional view of the multipurpose stadium in an event mode. FIG. 4 is a plan view schematically showing a multipurpose stadium in which a field has moved to a predetermined position so as to move away from a first fixed wall. The top view which shows typically the multipurpose stadium where the venue roof was installed above the space for event venues. The top view which shows typically the multipurpose stadium where the rotary roof structure was installed in the audience stand ST on the field side of the 2nd fixed wall and the 3rd fixed wall. FIG. 2 is a side view schematically showing a rotary roof structure. (A) is a side view showing a rotary roof structure in a “used state” by lifting a roof body by driving means using a traction device, and (b) lowering the roof body by driving means using a traction device. FIG. 4 is a side view showing the rotary roof structure in the “retracted state”. (A) is a side view showing a rotatable roof structure in a “used state” by lifting a roof body by a driving means using a stretchable support member, and (b) is a drive means using a stretchable support member. The side view which shows the rotary roof structure which made the "storage state" by lowering a roof body by the. (A) is a side view showing a rotary roof structure in a “used state” by pulling up a roof body by a driving unit using an elastic supporting member, and (b) is a driving unit using an elastic supporting member. The side view which shows the rotary roof structure which made the "storage state" by lowering a roof body by the. (A) is a plan view schematically showing a multipurpose stadium having a rotating roof structure, in which the rotating roof structure is used, and (b) is a multipurpose stadium having a rotating roof structure. FIG. 2 is a plan view schematically showing a multi-purpose stadium in which a rotating roof structure is in a stored state, which is a stadium. (A) is a step diagram showing a multipurpose stadium in a "competition mode", (b) is a step diagram showing a multipurpose stadium in a state where the field is sliding backward, and (c) is a movable wall sliding forward. The step figure showing the multipurpose stadium in the state “event mode”.

  An example of an embodiment of a multipurpose stadium of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view schematically showing a multipurpose stadium 100 of the present invention. As shown in this figure, the multipurpose stadium 100 of the present invention has a field 130 in the center and an outer wall provided around the field. In the space surrounded by the outer wall, a seat stand ST is installed so as to surround the field 130. Although FIG. 1 shows an example of a soccer stadium including a soccer field 130, the present invention can be implemented as various stadiums such as a baseball stadium and a track stadium in addition to a soccer stadium.

  The outer wall of the multipurpose stadium 100 includes a slidable movable wall 110 and a fixed wall that does not move. For example, in FIG. 1, the movable wall 110 arranged on one goal line side (the right side in the figure), the first fixed wall 121 arranged on the other goal line side (the left side in the figure), and one side line side The outer wall is constituted by the second fixed wall 122 arranged on the upper side (in the figure) and the third fixed wall 123 arranged on the other side line side (the lower side in the figure).

  One feature of the multipurpose stadium 100 of the present invention is that the movable wall 110 is movable, and the area of the “venue area” including the field 130 and the seat stand ST is changed according to the movement of the movable wall 110. Can be changed. The movable wall 110 is slidable back and forth in a moving direction (FIG. 1) that is substantially perpendicular (including perpendicular) to the longitudinal direction (FIG. 1) of the movable wall 110, and the movable wall 110 is opposed to the movable wall 110 across the field 130. When the movable wall 110 slides closer to the first fixed wall 121, the venue area becomes narrower, and when the movable wall 110 slides away from the first fixed wall 121, the venue area becomes wider. Here, for convenience, the slide approaching the first fixed wall 121 is referred to as “forward slide”, and the slide moving away from the first fixed wall 121 is referred to as “retreat slide” (FIG. 1).

  Since the area of the venue area can be changed, a large venue area can be ensured when playing a soccer game as shown in FIG. 1 (hereinafter, this state is referred to as a "competition mode"). When an event to mobilize a large number of spectators is held, the venue area can be slightly narrowed as shown in FIG. 2 (hereinafter, this state is referred to as “event mode”). FIG. 2 is a plan view schematically showing the multipurpose stadium 100 in the event mode when the movable wall 110 slides forward to a predetermined position. As shown in this figure, by setting the event mode, an event venue space 200 having an appropriate area (area) including the stage 210 is formed. For example, if a concert is performed in the event venue space 200, the audience will be near. In addition to being able to appreciate the performance, excellent sound effects can be obtained.

  3A and 3B are diagrams illustrating the movement of the movable wall 110. FIG. 3A is a cross-sectional view of the multipurpose stadium 100 in a state where the movable wall 110 is passing through, and FIG. FIG. 2 is a cross-sectional view of the multipurpose stadium 100 in a state in which the stadium does not pass through. Any of the cross-sectional views is a view seen from the first fixed wall 121 shown in FIG.

  The movable wall 110 shown in FIG. 3B includes an upper support beam 110a and a main body wall 110b, and an upper moving body 110c and a ground disposed on fixed walls (second fixed wall 122 and third fixed wall 123). It is configured to include a lower moving body 110d disposed thereon. The main body wall 110b is a wall body for covering a part of the space (forming a closed space), and the support beam 110a is a member that supports (hangs) the main body wall 110b from above. Note that a customer stand ST may be provided on the surface of the main body wall 110b on the field 130 side as shown in FIG. 3B. The movable wall 110 shown in FIG. 3B includes an upper movable body 110c and a lower movable body 110d. Depending on the size (weight) of the movable wall 110, the movable wall 110 may be one of the upper movable body 110c and the lower movable body 110d. A configuration having only one of them may be adopted.

  The upper moving body 110c and the lower moving body 110d are means for sliding the movable wall 110 forward or backward, and various kinds of means conventionally used such as a truck, a crawler, and a rail can be used. As the power for sliding the movable wall 110, a motor for self-propelling, a winch for towing with a wire rope, a gear (rack and pinion), and the like can be used. Various means can be used. In order to slide the movable wall 110 in this manner, a winch wire method, a rack and pinion method, a chain method, a jack method, or the like can be used as a driving method. System, a rotating shaft system, a hydrostatic bearing system, a magnetic levitation system, and the like. In the example of FIG. 3B, the wheels (upper moving body 110c) are arranged on a track (rail) laid on the upper surfaces of the second fixed wall 122 and the third fixed wall 123, and the tire (lower moving body) is placed on the ground. The body 110d) is arranged, and the winches at both ends (on the first fixed wall 121 side and the opposite side) pull the wire rope to slide the movable wall 110 to which the wire rope is fixed.

  The event venue space 200 shown in FIG. 2 is formed using about half (left side) of the field 130, that is, is set up on the field 130. Therefore, after appropriate curing is applied to the range of the field 130 to be used, the venue including the stage 210 is set up. However, curing the field 130 requires time and effort, and if the field 130 is a natural turf, there is a concern that the turf may be damaged unless proper curing is performed. Thus, as shown in FIG. 4, the field 130 may have a slidable structure.

  FIG. 4 is a plan view schematically showing the multipurpose stadium 100 in which the field 130 has moved to a predetermined position so as to move away from the first fixed wall 121. In this figure, as in FIG. 2, the event venue is formed by the movable wall 110, the first fixed wall 121, and a part of the second fixed wall 122 (generally the left half) and a part of the third fixed wall 123 (generally the left half). Although the space 200 is formed for the event, unlike the case shown in FIG. 2, the field 130 slides backward (FIG. 1), so that the space 200 for the event venue is formed in a state where the field is removed. Therefore, the venue including the stage 210 can be set up without performing appropriate curing for the field 130.

  In this case, the field 130 is slidable coaxially with the moving direction of the movable wall 110 (FIG. 1), and the field 130 is slid backward and then the movable wall 110 is slid forward to form the event venue space 200. Good to do. The slide of the field 130 can be self-propelled by a motor after being provided with moving means such as a carriage, a crawler, and a rail, similarly to the movable wall 110, or can be a tow-type or rack using a winch and a wire rope. -Various other methods such as a pinion method and a chain method can also be adopted.

  When the event venue space 200 is used for an event mainly composed of music, such as a concert, the outer wall (the movable wall 110 and the first fixed wall) is used to obtain a further acoustic effect and to provide soundproofing measures to the neighborhood. The event venue space 200 surrounded by the wall 121, the second fixed wall 122, and the third fixed wall 123) may be formed as a closed space. In this case, the venue roof 300 can be installed above the event venue space 200 as shown in FIG. FIG. 5 is a plan view schematically showing the multipurpose stadium 100 in which the venue roof 300 is installed above the event venue space 200. By installing the venue roof 300, the side surface of the event venue space 200 is closed by the outer wall, and the upper surface thereof is closed by the venue roof 300, so that the sound effect and soundproofing measures are further improved. Since the venue roof 300 may not be required in the competition mode, the venue roof 300 may be movable or have a structure that can be easily installed only in the event mode.

  In a general stadium, a roof may be provided on the seat stand ST for the purpose of protecting the audience from rain or direct sunlight. When the multipurpose stadium 100 of the present invention is used in the competition mode, it is preferable to provide a roof on the audience seat ST because the audience can be protected from rain and direct sunlight. However, if a roof is permanently installed on the customer stand ST (particularly, on the field 130 side of the second fixed wall 122 and the third fixed wall 123), the roof on the customer stand ST becomes a barrier against sliding of the movable wall 110. Therefore, a rotatable roof structure may be provided above the customer stand ST (particularly, on the field 130 side of the second fixed wall 122 and the third fixed wall 123). In this rotary roof structure, the roof body is rotatable as described later, and as shown in FIG. 3, when the movable wall 110 slides, the roof body is in a folded state (“storage state” described later). can do. Hereinafter, the rotary roof structure will be described in detail.

  FIG. 6 is a plan view schematically showing the multipurpose stadium 100 in which the rotary roof structure 400 is installed on the seat stand ST on the field 130 side of the second fixed wall 122 and the third fixed wall 123. As shown in this figure, the rotary roof structure 400 is more effective when installed above a customer stand ST provided substantially parallel to (including parallel to) the moving direction of the movable wall 110 (FIG. 1).

  FIG. 7 is a side view schematically showing the rotary roof structure 400. The rotary roof structure 400 is a structure including a roof 410 that rotates around a rotation axis 420 and a driving unit (not shown) that rotates the roof 410. A large number of seats are arranged in the seat stand ST in the horizontal direction (the depth direction in FIG. 7 in FIG. 7), and the rotation shaft 420 is arranged substantially parallel to the arrangement direction of the seats (that is, the moving direction shown in FIG. 1). Is done.

  The roof 410 has a substantially flat plate shape, and its longitudinal direction (the depth direction in FIG. 7) is the direction of the rotation axis 420, and its short direction (the left and right direction in FIG. 7) is the seat stand ST and the field 130 (right side in the drawing). ). Note that, for convenience, an end of the roof 410 closer to the field 130 is referred to as a “front end”, and an end of the roof 410 remote from the field 130 is referred to as a “rear end”. I mean.

  In addition, the roof body 410 can rotate around the rotation axis 420 by being supported by the rotation axis 420 at the rear end (in other words, cantilevered), and the front end moves up and down with this rotation. . In FIG. 7, when the roof 410 rotates counterclockwise, the front end of the roof 410 rises, and when the roof 410 rotates clockwise, the front end of the roof 410 descends. Here, for convenience, the rotation in which the front end of the roof 410 rises is referred to as “forward rotation (counterclockwise in FIG. 7)”, and the rotation in which the front end of the roof 410 descends is “anti-rotation”. (Clockwise in FIG. 7). "

  FIGS. 8A and 8B are side views showing a state in which the roof 410 is rotated by a driving unit using the traction device 431, wherein FIG. 8A shows a use state and FIG. Here, the “use state” is a state in which the roof body 410 rotates forward and the front end is raised to a predetermined position (a preset height), that is, a state in which the roof body 410 functions as the roof of the customer stand ST. It is. On the other hand, the "retracted state" is a state in which the roof 410 is rotated counterclockwise and the front end is lowered to a predetermined position (for example, immediately above a customer seat), that is, the roof 410 does not become a barrier to the sliding of the movable wall 110 ( FIG. 3) This is the state.

  The driving means shown in FIG. 8 includes a traction device 431 and a measure 432. Among them, the traction device 431 can use a discharge device such as a winch or a hoist, and the measure 432 can use a wire rope or the like. In addition, the measure member 432 is wound around the traction device 431, passes through several pulleys, and has one end fixed to a part of the upper surface side of the roof 410.

  As shown in FIG. 8A, when the towing device 431 winds (pulls) the measure 432, the roof 410 fixed to the measure 432 rotates forward and the front end rises. Finally, the state becomes “used”. On the other hand, if the traction device 431 unwinds (looses) the measure 432 as shown in FIG. 8B, the roof 410 rotates counterclockwise and the front end descends, and finally, the “retracted” State ".

  FIGS. 9A and 9B are side views showing a state in which the roof 410 is rotated by a driving unit using an extendable support member 433. FIG. 9A shows a use state, and FIG. 9B shows a storage state. The driving means shown in FIG. 9 is configured to include a support member 433. The upper end of the support member 433 is rotatably fixed to a part of the lower surface side of the roof 410, and the lower end of the drive member ST Partially fixed rotatably.

  The support member 433 has a structure that can be extended and contracted. For example, the support member 433 includes an outer tube and an inner member housed therein, and can have a structure in which the inner member moves with respect to the outer tube by hydraulic pressure, electric power, or the like. With such a structure, if the support member 433 extends as shown in FIG. 9A, the roof 410 fixed to the upper end of the support member 433 rotates forward and the front end rises. And finally become “used”. On the other hand, if the support member 433 contracts as shown in FIG. 9B, the roof 410 rotates counterclockwise and the front end descends, and finally enters the “retracted state”.

  When an upper support such as a truss-structured beam is disposed above the customer stand ST, a driving unit including the traction device 431 and the strut 432 can be installed on the upper surface side of the roof 410. More specifically, the traction device 431 is fixed to the upper support, the security member 432 is wound around the traction device 431, and one end thereof is fixed to a part on the upper surface side of the roof 410. Accordingly, when the towing device 431 winds up (pulls) the measure 432, the roof 410 fixed to the measure 432 rotates forward so that the roof 410 is pulled up, and the front end rises. It becomes "usage state". On the other hand, if the towing device 431 unwinds (looses) the measure material 432, the front end portion descends counterclockwise so that the roof 410 is lowered, and finally enters the “retracted state”.

  When an upper support such as a truss-structured beam is disposed above the customer stand ST, an extensible support member 433 shown in FIG. 10 is used instead of the driving means including the traction device 431 and the struts 432. Driving means can also be provided. Specifically, the upper end of the support member 433 is rotatably fixed to a part of the upper support, and the lower end has a structure in which a part of the upper surface side of the roof 410 is rotatably fixed. Then, as the support member 433 contracts, the roof 410 fixed to the lower end of the support member 433 rotates forward and the front end rises, and finally enters the “used state”. On the other hand, if the support member 433 is extended, the roof 410 is rotated in the opposite direction and the front end is lowered, and finally the storage state is set.

  FIG. 11A is a plan view schematically showing the multipurpose stadium 100 including the rotary roof structure 400 in which the rotary roof structure 400 is in a use state, and FIG. FIG. 1) is a plan view schematically showing the multipurpose stadium 100 including the rotary roof structure 400, in which the rotary roof structure 400 is stored. In addition, in this figure, the rotary roof structure 400 is divided into two on each side line side, but it is also possible to install a single rotary roof structure 400 without dividing, or to divide the structure into three or more. A rotatable roof structure 400 can also be installed. The rotation shaft 420 to which the rear end of the roof 410 is attached is set on the “rotation axis direction” indicated by a dashed arrow in the drawing.

  The rotary roof structure 400 is naturally installed such that the roof body 410 is located above the customer seat. Then, when the rotary roof structure 400 is put into the use state, as shown in FIG. 11A, the roof body 410 covers all the passenger seats on the side line side and also covers a part of the field 130 (around the side line). On the other hand, when the rotatable roof structure 400 is in the retracted state, the roof body 410 does not cover the field 130 as shown in FIG. 11B, and therefore, when viewed from above, the entire area of the field 130 appears.

(Example of use)
FIG. 12 is a step diagram showing a process of changing the multipurpose stadium 100 of the present invention from the “competition mode” to the “event mode”. FIG. 12A shows the multipurpose stadium 100 in the “competition mode”, and ) Shows the multipurpose stadium 100 with the field 130 sliding backward, and (c) shows the multipurpose stadium 100 in the “event mode” with the movable wall 110 sliding forward.

  To change the multipurpose stadium 100 from the “competition mode” to the “event mode”, the field 130 is slid backward to a predetermined position as shown in FIG. The “predetermined position” may be a position where a part of the field 130 does not remain in the event venue space 200 and may be set in advance. When the rotatable roof structure 400 is installed on the customer stand ST, the rotatable body 410 is turned in the opposite direction, so that the rotatable roof structure 400 is changed from the “use state” to the “retracted state”.

  When the field 130 is slid backward to a predetermined position and the rotary roof structure 400 is set to the "retracted state", the movable wall 110 is slid forward to a predetermined position as shown in FIG. The “predetermined position” is a position where the event venue space 200 has a previously planned area (size). When the movable wall 110 is slid forward to a predetermined position, necessary facilities such as a stage 210 and temporary arena seats are installed in the event venue space 200, and a desired event venue is set up.

  The multi-purpose stadium of the present invention can be used in various facilities such as various sports athletic facilities such as a soccer stadium, a baseball stadium, and an athletic stadium, and performance facilities for performing various events including concerts.

Reference Signs List 100 multipurpose stadium 110 movable wall (of multipurpose stadium) 110a (movable wall) support beam 110b (movable wall) body wall 110c (movable wall) upper moving body 110d (movable wall) lower moving body 121 (multipurpose wall) First fixed wall 122 (of the multi-purpose stadium) Second fixed wall 123 (of the multi-purpose stadium) Third fixed wall 130 (of the multi-purpose stadium) 130 Field (of the multi-purpose stadium) 200 Event space (of the multi-purpose stadium) 210 Stage 300 (for multipurpose stadium) Roof 400 (for multipurpose stadium) Revolving roof structure 410 (for multipurpose stadium) Roof body 420 (for revolving roof structure) Axis of rotation 431 (for revolving roof structure) Traction device 432 (for rotating roof structure) Strategy material (for rotating roof structure) 433 Support material (for rotating roof structure) ST Passenger stand

Claims (3)

In a stadium having a field and an outer wall installed around the field,
The outer wall includes a fixed wall and a movable wall that are arranged to face each other across the field,
The movable wall is slidable in a direction perpendicular or substantially perpendicular to the longitudinal direction of the movable wall,
When the movable wall moves to a predetermined position so as to approach the fixed wall, a space for an event venue is formed between the movable wall and the fixed wall,
A multipurpose stadium characterized by the following. The field is slidable coaxially with a moving direction of the movable wall,
When the movable wall moves to a predetermined position so as to approach the fixed wall and the field moves to a predetermined position so as to move away from the fixed wall, a space for an event venue where the field is removed is formed.
The multi-purpose stadium according to claim 1, wherein: Equipped with a roof structure that covers the upper part of the audience stand,
The roof structure includes: a roof body that rotates around a rotation axis disposed substantially parallel to the direction in which the seats are arranged; and a driving unit that rotates the roof body.
In the roof, a rear end of the roof far from the field is attached to the rotating shaft, and a front end of the roof closer to the field in the roof is rotated with the rotation of the roof. Move up and down,
When the roof body rotates forward and the front end rises to a predetermined position, it is in a use state, and when the roof body rotates counterclockwise and the front end descends to a predetermined position, it is in a retracted state,
The movable wall is slidable when the roof is in a retracted state,
The multipurpose stadium according to claim 1 or 2, wherein

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