WO2017175459A1

WO2017175459A1 - Vertical-hole closing apparatus

Info

Publication number: WO2017175459A1
Application number: PCT/JP2017/003356
Authority: WO
Inventors: 京一仲保; 善人山川; 訓兄宮本; 俊明森井; 雄一郎木村
Original assignee: 日立造船株式会社
Priority date: 2016-04-06
Filing date: 2017-01-31
Publication date: 2017-10-12
Also published as: JP2017186809A

Abstract

This vertical-hole closing apparatus (100) includes: a movable wall (30) provided above a vertical hole (H) beneath which a space is formed; and urging members (51). The movable wall is configured to close the vertical hole by being turned, against the urging force of the urging members, to a horizontal position by the liquid pressure applied by liquid and to open the vertical hole by being turned to an upright position by the urging force of the urging members, thus returning to the upright position when the liquid pressure decreases or is eliminated.

Description

Vertical hole occlusion device

The present invention relates to a vertical hole closing device.

Conventionally, a structure in which a space (underground space) is formed in the lower part is known. Such a structure in which a space (underground space) is formed in the lower part is disclosed in, for example, Japanese Patent No. 2765630.

Japanese Patent No. 2765630 discloses a structure of an underground space as a subway station structure. The structure of the underground space is provided with an exhaust port, an intake port, and a staircase that connect the lower underground space (such as a station platform) and the upper ground.

Japanese Patent No. 2765630

However, in the structure of the underground space disclosed in Japanese Patent No. 2765630, in the case of flooding due to heavy rain or tsunami, the water surface is more than the openings (vertical holes) on the ground such as exhaust ports, intake ports and stairs. When located above, it is considered that there is a problem that water flows into the lower underground space through the vertical hole. In this case, since it is not easy to discharge water from the lower space to the upper portion, there is a great demand for suppressing water from flowing into the lower space.

The present invention has been made to solve the above-described problems, and one object of the present invention is a vertical hole capable of suppressing liquid from flowing into a lower space through the vertical hole. It is to provide an occluding device.

In order to achieve the above object, a vertical hole closing device according to one aspect of the present invention is provided at an upper part of a vertical hole in which a space is formed in a lower part, and opens a lying position and a vertical hole that close the vertical hole. A movable wall rotatable to the standing position, and a biasing member that biases the movable wall to be positioned at the standing position, and the movable wall resists the biasing force of the biasing member due to liquid pressure caused by liquid. When the liquid pressure decreases or disappears, it is rotated to the upright position by the urging force of the urging member and returned to the upright position to close the vertical hole. It is configured to open. The “upper part of the vertical hole” includes not only the outer part located above the vertical hole but also the upper part (upper part) inside the vertical hole. The liquid pressure includes both a static pressure due to the liquid and a dynamic pressure due to the liquid.

In the vertical hole closing device according to one aspect of the present invention, as described above, the vertical hole is formed at the upper part of the vertical hole in which the space is formed at the lower position and the standing position where the vertical hole is opened. A movable movable wall is provided, and the movable wall is configured to be rotated to the fall position against the urging force of the urging member by the liquid pressure of the liquid to close the vertical hole. Accordingly, when the liquid pressure due to the liquid is applied to the movable wall due to, for example, water immersion, the vertical hole can be automatically closed by rotating the movable wall to the lying down position. It is possible to prevent the liquid from flowing into the lower space (a space provided with an underground structure or the like) through the. Further, the movable wall is configured to be rotated to the upright position by the urging force of the urging member and returned to the upright position to open the vertical hole when the liquid pressure decreases or disappears. As a result, when the liquid pressure due to flooding or the like decreases or disappears, the vertical wall can be automatically opened by rotating the movable wall to the upright position. Air circulation between the space and the lower space can be automatically resumed. As a result, the open / close state of the vertical hole can be switched according to the state of the liquid pressure without requiring an artificial operation.

In the vertical hole closing device according to the above one aspect, preferably, the vertical hole is provided at an upper portion of the vertical hole, and further includes a standing wall portion having a rectangular shape in plan view, and the movable wall has a rectangular shape in plan view. It arrange | positions so that at least 1 side may be comprised. With this configuration, when liquid pressure is applied by liquid from the horizontal direction perpendicular to the wall surface of the movable wall that forms at least one side of the rectangular shape, the liquid pressure applied to the movable wall can be reliably ensured. Since it can enlarge, a movable wall can be easily rotated to a fall position.

In the vertical hole closing device according to the above aspect, preferably, an upper portion of the vertical hole is provided to be inclined obliquely upward from the movable wall side to the opposite side of the movable wall, and an opening corresponding to the vertical hole is provided. The movable wall is further configured to close the vertical hole by closing the opening of the frame in the lying down position. Here, when the frame portion is horizontal, the wall surface of the movable wall extends horizontally when the frame portion is rotated to the lying down position. At this time, not only the liquid pressure but also almost all of the weight of the movable wall itself becomes a force for rotating the movable wall in the lying down direction, and as a result, the force required to return the movable wall to the standing position is increased. End up. Thus, as in the configuration of the present invention, if the frame portion is configured to be inclined obliquely upward from the movable wall side toward the opposite side of the movable wall, the frame portion is horizontal compared to the case where the frame portion is horizontal. Since the force required to return the movable wall to the upright position can be suppressed, it is not necessary to increase the size of the biasing member in order to increase the biasing force of the biasing member. Thereby, the enlargement of a vertical hole obstruction | occlusion apparatus can be suppressed.

In this case, preferably, a support wall that supports the frame portion in an inclined state is further provided, and the support wall is disposed so as to constitute a fixed wall of a standing wall portion provided in an upper portion of the vertical hole. If comprised in this way, it can suppress reliably that a frame part moves by the support wall which comprises a fixed wall, Therefore A movable wall becomes an opening part of a frame part resulting from a frame part moving. Can be reliably prevented from being blocked.

In the vertical hole closing device according to the above aspect, preferably, the biasing member includes a weight member, the weight member includes a plurality of weights, and the plurality of weights move from the lying position to the standing position. The urging force is gradually reduced by decreasing the number of weights that contribute to the urging force of the weights. If comprised in this way, when a liquid pressure increases a little, since a movable wall can be rotated in an inclining direction at an early stage, it will control early that a liquid flows into a lower space via a vertical hole. Can do.

In the configuration in which the movable wall constitutes at least one side of the standing wall portion, the movable wall is preferably arranged so as to constitute two opposite sides of the rectangular standing wall portion in plan view. If comprised in this way, the magnitude | size of the movable wall which obstruct | occludes a vertical hole can be made small compared with the case where only one side is comprised with a movable wall by the movable wall which comprises two opposing sides. Thereby, size reduction of a vertical hole obstruction | occlusion apparatus can be achieved. Moreover, even if it is a vertical hole with a large opening area, a vertical hole can be reliably obstruct | occluded by two movable walls which comprise two sides.

According to the present invention, as described above, the liquid can be prevented from flowing into the lower space through the vertical hole.

It is the typical perspective view which showed the vertical hole obstruction | occlusion apparatus by 1st Embodiment of this invention. It is the top view which showed the vertical hole obstruction | occlusion apparatus by 1st Embodiment of this invention. FIG. 3 is a cross-sectional view taken along line 500-500 in FIG. It is the side view which showed the vertical hole obstruction | occlusion apparatus by 1st Embodiment of this invention. It is the graph which showed the rotational moment in the movable wall of the vertical hole obstruction | occlusion apparatus by 1st Embodiment of this invention. It is sectional drawing which showed the vertical hole obstruction | occlusion apparatus at the time of the water immersion by 1st Embodiment of this invention. It is the side view which showed the vertical hole obstruction | occlusion apparatus by 2nd Embodiment of this invention. It is sectional drawing which showed the vertical hole obstruction | occlusion apparatus by 2nd Embodiment of this invention. It is the graph which showed the rotational moment in the movable wall of the vertical hole obstruction | occlusion apparatus by 2nd Embodiment of this invention. It is the side view which expanded and showed the energizing part of the vertical hole obstruction | occlusion apparatus by 2nd Embodiment of this invention. It is the top view which showed the vertical hole obstruction | occlusion apparatus by 3rd Embodiment of this invention. FIG. 12 is a cross-sectional view taken along line 510-510 in FIG. It is the top view which showed the vertical hole obstruction | occlusion apparatus by 4th Embodiment of this invention. FIG. 15 is a sectional view taken along line 520-520 in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
A vertical hole closing device 100 according to a first embodiment of the present invention will be described with reference to FIGS.

(Configuration of vertical hole closing device)
The vertical hole closing device 100 according to the first embodiment of the present invention is provided in the lower part where underground structures such as underground streets and subway tunnels are provided via the vertical holes H when inundation due to heavy rain or tsunami occurs. It has a function to prevent water from flowing into the space (underground space). As shown in FIG. 1, the vertical hole closing device 100 is provided in an upper part of a vertical hole H extending in the vertical direction (Z direction). The vertical hole H extends in the vertical direction so as to connect the space below the vertical hole H and the ground located above the vertical hole H. The vertical hole H is, for example, a vertical hole for ventilation of an underground structure, and air in the underground structure is discharged to the ground via the vertical hole H, and air on the ground is converted into the underground structure. It is captured. Water is an example of the “liquid” in the claims.

Further, the vertical hole H is formed in a rectangular shape in plan view. The vertical hole H has a length of, for example, 1 m to 3 m in both the X direction and the Y direction, which are horizontal directions perpendicular to the vertical direction. In a plan view, the direction in which the pair of fixed walls 10 extends is defined as the X direction, and the direction in which the pair of fixed walls 10 face each other is defined as the Y direction.

The vertical hole closing device 100 is installed on the ground surface S. As shown in FIG. 2, the vertical hole closing device 100 includes a pair of fixed walls 10, a frame portion 20, a movable wall 30, a pair of drums (pulleys) 40, and a pair of urging portions 50. And a pair of cables 60. Further, the vertical hole closing device 100 has a substantially symmetric structure in plan view with respect to a center line (500-500 line in FIG. 2) passing through the approximate center in the Y direction and extending in the X direction.

The pair of fixed walls 10 are both formed in a rectangular shape that is long in the X direction in plan view. Further, as shown in FIG. 1, the pair of fixed walls 10 are both formed in a flat plate shape extending in the vertical direction while being fixed to the ground surface S.

As shown in FIG. 2, the frame portion 20 is formed in a rectangular frame shape so as to surround the vertical hole H in a plan view. The frame portion 20 is provided on the X1 side, and includes a frame portion 21 extending in the Y direction, a pair of inclined frame portions 22 respectively extending from the both ends of the frame portion 21 in the Y direction toward the X2 side, and a pair of A fixed frame portion 23 connected to the inclined frame portion 22 and extending in the Y direction is included. An opening 24 communicating with the vertical hole H is formed in a portion surrounded by the frame portion 21, the pair of inclined frame portions 22 and the fixed frame portion 23. The fixed frame portion 23 is formed in a flat plate shape extending in the vertical direction while being fixed to the ground surface S, and supports the pair of inclined frame portions 22. The fixed frame portion 23 is an example of the “fixed wall” and the “support wall” in the claims.

As shown in FIG. 3, the frame portion 21 is hardly inclined and is formed at a substantially uniform height position along the Y direction. On the other hand, the pair of inclined frame portions 22 are both obliquely upward (Z1 side) from the frame portion 21 (X1 side) on the movable wall 30 side toward the fixed frame portion 23 (X2 side) opposite to the movable wall 30. ) To be inclined. Further, the upper surface of the fixed frame portion 23 is provided so as to be inclined obliquely upward from the X1 side toward the X2 side so as to be continuous with the pair of inclined frame portions 22. In addition, the inclination angle θ of the upper surfaces of the inclined frame portion 22 and the fixed frame portion 23 with respect to the vertical direction is about 45 degrees. The inclination angle θ is preferably about 60 degrees or less.

The movable wall 30 is provided adjacent to the X1 side of the frame portion 21. As shown in FIG. 2, the movable wall 30 is disposed at a position between the pair of fixed walls 10 facing in the Y direction in plan view. The movable wall 30 is formed in a flat plate shape extending in the Y direction in plan view. As shown in FIG. 3, the movable wall 30 is rotated around a rotation shaft 31 provided in the vicinity of the lower end, so that the wall surface on the X2 side is the frame portion 20. It is comprised so that it can rotate to the lying position which contacts. As shown in FIG. 2, the rotation shaft 31 is formed to extend in the Y direction, and both end portions in the Y direction are rotatably supported by the pair of fixed walls 10.

In the lying position, the movable wall 30 is configured to close the vertical hole H by closing the opening 24 of the frame part 20. The inclination angle of the movable wall 30 in the vertical position with respect to the vertical direction is substantially the same as the inclination angle θ of the upper surfaces of the inclined frame portion 22 and the fixed frame portion 23.

Further, a seal member 32 a is provided on the wall surface on the X2 side of the movable wall 30. Specifically, the seal member 32a is formed in a portion of the wall surface on the X2 side of the movable wall 30 where the movable wall 30 abuts the frame portion 20 at the lying position (near the outer peripheral portion of the wall surface on the X2 side). . This prevents water from entering the vertical hole H through the gap between the frame portion 20 and the movable wall 30 at the lying position. Moreover, as shown in FIG. 2, the sealing member 32b is formed in the side end surface which opposes a pair of fixed wall 10 of the movable wall 30, respectively. Thereby, it is suppressed that water leaks from the gap between the fixed wall 10 and the movable wall 30.

In plan view, each of the pair of fixed walls 10, the fixed frame portion 23 of the X2 side frame portion 20, and the X1 side movable wall 30 constitutes one side of the rectangular shape, thereby forming a rectangular shape. The standing wall part 70 which has is comprised.

The pair of drums 40 is attached to the upper part of the pair of fixed walls 10 on the X1 side of the fixed wall 10, respectively. The drum 40 has a cylindrical shape and is configured to rotate around a rotation axis extending in the Y direction. The drum 40 has a function of causing the movable wall 30 to stand up (A1 direction) in a direction of an urging force by a weight member 51 described later of the urging unit 50 that works in the vertical direction.

The pair of urging portions 50 are respectively provided in the vicinity of the pair of fixed walls 10 on the X1 side. As shown in FIG. 4, the urging portion 50 includes a weight member 51 that is moved in the vertical direction by the cable 60, and a pair of guide wall portions 52 that guide the movement of the weight member 51. The weight member 51 is composed of a single weight 51a having a rectangular parallelepiped shape. The pair of guide wall portions 52 are formed in the vicinity of both ends in the X direction of the weight member 51 and are formed in a flat plate shape extending in the vertical direction while being fixed to the ground surface S and the fixed wall 10. Yes. Thereby, the weight member 51 is configured to move mainly in the vertical direction by being guided by the pair of guide wall portions 52. The weight member 51 is an example of the “biasing member” in the claims.

The cable 60 connects the movable wall 30 and the weight member 51 of the urging portion 50. Specifically, the cable 60 is connected and fixed to the upper surface of the weight member 51 as shown in FIG. The cable 60 extends from the upper surface of the weight member 51 in the vertical direction and is hung on the drum 40. As shown in FIG. 3, the cable 60 hung on the drum 40 is connected and fixed in the vicinity of the upper end portion of the movable wall 30 opposite to the side on which the rotation shaft 31 is provided. Thereby, the cable 60 is connected to the movable wall 30 so that the urging force of the weight member 51 is applied in the standing direction (A1 direction) of the movable wall 30.

Here, in the first embodiment, as shown in FIG. 5, the rotational moment M1 in the standing direction of the movable wall 30 by the urging force of the weight member 51 is configured to be substantially constant. Further, the magnitude of the rotational moment M1 in the standing direction of the movable wall 30 due to the urging force of the weight member 51 is the magnitude of the rotational moment M2 (M2max) in the lying down direction (A2 direction) due to the weight of the movable wall 30 at the lying position. It is comprised so that it may become larger than this. That is, the combined moment M of the rotational moment M1 and the rotational moment M2 is configured to always be a rotational moment in the standing direction.

(Rotating motion of the movable wall)
By being configured as described above, in the normal state of the vertical hole closing device 100 in the first embodiment, as shown in FIG. 3, the urging force by the weight member 51 via the cable 60 is applied to the movable wall 30. Thus, a rotational moment M1 in the rising direction (A1 direction) of the movable wall 30 is applied. Thereby, the movable wall 30 is configured to be automatically positioned at the standing position in the normal state.

Then, as shown in FIG. 6, the water pressure due to the flooding is applied from the X1 side of the movable wall 30, and the magnitude of the rotational moment M3 in the falling direction (A2 direction) of the movable wall 30 due to the water pressure is When the magnitude of the rotational moment M1 in the standing direction of the movable wall 30 due to the urging force is exceeded, the movable wall 30 is rotated in the inclining direction against the urging force of the weight member 51 by water pressure, and the movable wall 30 is inclined. Pivoted into position. Thereby, the opening part 24 of the frame part 20 is obstruct | occluded by the movable wall 30, and the vertical hole H is obstruct | occluded automatically.

Thereafter, in the state where the movable wall 30 is in the lying position, the water pressure due to the flooding decreases, and the rotational moment M3 in the lying direction of the movable wall 30 due to the water pressure and the rotating moment in the lying direction due to the weight of the movable wall 30 at the lying position. When the total of M2 is less than the rotational moment M1 in the standing direction of the movable wall 30 due to the biasing force of the weight member 51 (M2 + M3 <M1), the movable wall 30 is rotated in the standing direction by the biasing force of the weight member 51. Thus, the movable wall 30 is rotated to the standing position (see FIG. 3). In addition, when the water pressure due to the flooding disappears when the movable wall 30 is in the lying position, the rotational moment M2 (M2max) in the lying direction due to the weight of the movable wall 30 at the lying position is due to the biasing force of the weight member 51. Since the rotational moment M1 in the standing direction of the movable wall 30 is smaller (M2max <M1), the movable wall 30 is pivoted in the standing direction by the urging force of the weight member 51, and the movable wall 30 is pivoted to the standing position. The Thereby, the opening part 24 of the frame part 20 is open | released by the movable wall 30, and the vertical hole H is open | released automatically.

(Effect of 1st Embodiment)
In the first embodiment, the following effects can be obtained.

In the first embodiment, as described above, the movable member is movable at the upper part of the vertical hole H in which a space is formed in the lower part, and can be rotated between a lying position for closing the vertical hole H and an upright position for opening the vertical hole H. The wall 30 is provided, and the movable wall 30 is configured to be turned to the lying position against the urging force of the weight member 51 by water pressure by water to close the vertical hole H. Thereby, when the water pressure is applied to the movable wall 30 due to flooding or the like, the movable wall 30 can be rotated to the lying down position to automatically close the vertical hole H. It is possible to suppress water from flowing into the lower space via the. Further, the movable wall 30 is configured such that when the water pressure decreases or disappears, the movable wall 30 is rotated to the upright position by the urging force of the weight member 51 and returned to the upright position to open the vertical hole H. Thereby, when the time of flooding is to be eliminated or eliminated, the vertical hole H can be automatically opened by rotating the movable wall 30 to the upright position. The air flow between the ground and the lower space can be automatically restarted. As a result, the open / close state of the vertical hole H can be switched without requiring an artificial operation according to the water pressure.

In the first embodiment, the movable wall 30 is arranged so as to form one side of the rectangular standing wall portion 70 in plan view. Thereby, when the water pressure is applied to the movable wall 30 from the horizontal direction (X1 direction) perpendicular to the surface of the movable wall 30 constituting at least one side of the rectangular shape, the water pressure applied to the movable wall 30 is reduced. Since it can be reliably enlarged, the movable wall 30 can be easily rotated to the lying down position.

In the first embodiment, the movable wall 30 is a frame including a pair of inclined frame portions 22 and a fixed frame portion 23 that are provided in an inclined position so as to be inclined obliquely upward toward the opposite side of the movable wall 30. The vertical hole H is configured to be closed by closing the opening 24 of the portion 20. Thereby, compared with the case where the frame part 20 is horizontal, it can suppress that the force required to return the movable wall 30 to a standing position can be suppressed, Therefore The urging | biasing force of the weight member 51 is enlarged. Therefore, it is not necessary to enlarge the weight member 51. Thereby, the enlargement of the vertical hole obstruction | occlusion apparatus 100 can be suppressed.

In the first embodiment, the fixed frame portion 23 that supports the pair of inclined frame portions 22 constitutes the fixed wall of the standing wall portion 70. Thereby, since it can suppress reliably that the frame part 20 moves by the fixed frame part 23, the movable wall 30 can block | close the opening part 24 of the frame part 20 resulting from the movement of the frame part 20. It is possible to reliably suppress the loss.

In the first embodiment, since the vertical hole H can be automatically closed and opened with a simple configuration using the movable wall 30 and the pair of urging portions 50, the configuration is complicated. As compared with the above, the occurrence of failure and malfunction can be effectively suppressed. Moreover, since the number of parts which comprise the vertical hole obstruction | occlusion apparatus 100 can also be reduced, the burden of the maintenance management of the vertical hole obstruction | occlusion apparatus 100 can also be reduced.

[Second Embodiment]
Next, a vertical hole closing device 200 according to a second embodiment of the present invention will be described with reference to FIGS. In this vertical hole closing device 200, unlike the first embodiment in which the weight member 51 is composed of one weight 51a, an example in which the weight member 151 is composed of a plurality of (three)

weights

151a, 151b, and 151c will be described. In addition, about the same structure as 1st Embodiment, while attaching | subjecting the same code | symbol, description is abbreviate | omitted. The weight member 151 is an example of the “biasing member” in the claims.

(Configuration of vertical hole closing device)
The vertical hole closing device 200 according to the second embodiment of the present invention includes an urging portion 150 instead of the urging portion 50 of the vertical hole closing device 100 in the first embodiment. As shown in FIG. 7, the urging portion 150 includes a weight member 151 that can be moved in the vertical direction by the cable 60, and a guide wall portion 152 that guides the movement of the weight member 151.

Unlike the weight member 51 of the first embodiment, the weight member 151 is divided into three

rectangular parallelepiped weights

151a, 151b, and 151c. Of the three

weights

151a, 151b, and 151c, the weight of the weight 151a is larger than the weight of the weight 151b, and the weight of the weight 151b is larger than the weight of the weight 151c. The length of the weight 151a in the X direction (the direction in which the fixed wall 10 extends) is smaller than the length of the weight 151b in the X direction, and the length of the weight 151b in the X direction is longer than the length of the weight 151c in the X direction. It is formed to be smaller.

A cable 60 is connected and fixed to the upper surface of the weight 151a. The weight 151a is disposed on the ground surface S. Further, through

holes

151d and 151e extending in the vertical direction are formed in the

weights

151b and 151c, respectively, and the cable 60 passes through the inside.

The guide wall part 152 has a pair of guide walls 152a, a pair of guide walls 152b, and a pair of guide walls 152c. The pair of guide walls 152a is formed in the vicinity of both ends in the X direction of the weight 151a, and has a function of guiding the weight 151a. The pair of guide walls 152a are formed in a flat plate shape extending in the vertical direction while being fixed to the ground surface S and the fixed wall 10. Here, when the inclination angle θ of the movable wall 30 with respect to the vertical direction becomes about 15 degrees (position Pb, see FIG. 8), the upper surface of the weight 151a lifted by the cable 60 is the guide wall 152a. The height H1 in the vertical direction from the ground surface S is set so as to be substantially the same height position as the upper end surface of. A weight 151b is arranged on the upper surface of the guide wall 152a.

The pair of guide walls 152b are formed in the vicinity of both ends in the X direction of the weight 151b, and have a function of guiding the weight 151b. The pair of guide walls 152b are formed in a flat plate shape extending in the vertical direction while being fixed to the fixed wall 10. Here, in the guide wall 152b, when the inclination angle θ with respect to the vertical direction of the movable wall 30 is about 30 degrees (position Pc, see FIG. 8), the upper surface of the weight 151b in the weight member 151 lifted by the cable 60 is The height H2 in the vertical direction from the ground surface S is set so as to be substantially the same height position as the upper end surface of the guide wall 152b. Further, the lower end surface of the guide wall 152b is provided at substantially the same height as the upper end surface of the guide wall 152a. A weight 151c is arranged on the upper surface of the guide wall 152b.

The pair of guide walls 152c are formed in the vicinity of both ends in the X direction of the weight 151c, and have a function of guiding the weight 151c. The pair of guide walls 152c are formed in a flat plate shape extending in the vertical direction while being fixed to the fixed wall 10. Here, in the guide wall 152c, the upper surface of the weight 151c in the weight member 151 lifted by the cable 60 when the inclination angle θ with respect to the vertical direction of the movable wall 30 becomes about 45 degrees (the fall position Pd, see FIG. 8). However, the height H3 in the vertical direction from the ground surface S is set so as to be substantially the same height position as the upper end surface of the guide wall 152c. In addition, the lower end surface of the guide wall 152c is provided at substantially the same height as the upper end surface of the guide wall 152b.

Here, as shown in FIG. 9, the magnitude of the rotational moment M1max (= M1a + M1b + M1c) in the standing direction of the movable wall 30 due to the urging forces of the

weights

151a, 151b and 151c at the lying position Pd is the movable wall at the lying position Pd. It is configured to be larger than the magnitude of the rotational moment M2 (M2max) in the lodging direction (A2 direction) due to its own weight of 30. The combined moment M of the rotational moment M1 and the rotational moment M2 is configured to always be a rotational moment in the standing direction.

(Rotating motion of the movable wall)
Due to the above configuration, in the vertical hole closing device 200 in the second embodiment, unlike the vertical hole closing device 100 in the first embodiment, the movable wall 30 moves from the standing position toward the lying position. Therefore, by gradually increasing the number of weights that contribute to the urging force in the standing direction, the urging force in the standing position becomes the weakest. Is done. This will be described in detail below.

In the normal state of the vertical hole closing device 200, as shown in FIGS. 7 and 8, the movable wall 30 is erected by the urging force of the weight 151a of the weight member 151 via the cable 60 (A1). Direction) is applied. Thereby, the movable wall 30 is configured to be automatically positioned at the standing position Pa in the normal state. Then, the water pressure due to the flooding is applied from the X1 side of the movable wall 30, and the magnitude of the rotational moment M3 in the lying down direction (A2 direction) of the movable wall 30 due to the water pressure is rotated in the standing direction by the urging force of the weight 151a. When the magnitude of the moment M1a is exceeded, the movable wall 30 is rotated in the lying down direction against the urging force of the weight 151a due to water pressure. When the inclination angle θ is not less than 0 degrees and less than 15 degrees, a rotational moment M1 (= M1a) in the standing direction due to the urging force of one weight 151a is applied to the movable wall 30.

Here, since the rotational moment in the standing direction is the rotational moment M1a in the standing direction due to the urging force of one of the three weights 151a, the movable wall 30 is allowed to fall down even if the water pressure is relatively low. Can be rotated. At this time, the rotational moment M2 in the lying down direction (A2 direction) due to the weight of the movable wall 30 changes greatly on the side closer to the standing position, and therefore, of the three

weights

151a, 151b and 151c, By maximizing the weight, it is possible to apply an urging force to the movable wall 30 in accordance with the change of the rotational moment M2 in the lying down direction due to the weight of the movable wall 30.

As shown in FIG. 8, when the movable wall 30 falls down (position Pb) until the inclination angle θ reaches 15 degrees (as shown in FIG. 10), as shown in FIG. 10, the upper surface of the lifted weight 151a is the weight 151b. Contact the lower surface. Thereby, the rotational moment M1 in the standing direction of the movable wall 30 by the urging force of the weight member 151 is the sum of the rotational moment M1a due to the weight 151a and the rotational moment M1b due to the weight 151b. That is, when the inclination angle θ is 15 degrees or more and less than 30 degrees, a rotational moment M1 (= M1a + M1b) in the standing direction due to the urging forces of the two

weights

151a and 151b is applied to the movable wall 30.

Thereafter, as shown in FIG. 8, when the movable wall 30 falls down (position Pc) until the inclination angle θ reaches 30 degrees, as shown in FIG. 10, the upper surface of the weight 151b lifted together with the weight 151a is It contacts the lower surface of the weight 151c. Thereby, the rotational moment M1 (= M1max) in the standing direction of the movable wall 30 due to the urging force of the weight member 151 includes the rotational moment M1a due to the weight 151a, the rotational moment M1b due to the weight 151b, and the rotational moment M1c due to the weight 151c. Is the sum of That is, when the inclination angle θ is not less than 30 degrees and not more than 45 degrees, a rotational moment M1 (= M1a + M1b + M1c) in the standing direction by the urging forces of the three

weights

151a, 151b, and 151c is applied to the movable wall 30.

In this state, as shown in FIG. 8, the movable wall 30 is rotated to the fall position Pd. Thereby, the opening part 24 of the frame part 20 is obstruct | occluded by the movable wall 30, and the vertical hole H is obstruct | occluded automatically.

After that, when the movable wall 30 is in the lying position Pd with the inclination angle θ of 45 degrees, the water pressure due to the flooding decreases, the rotational moment M3 of the movable wall 30 in the lying direction due to the water pressure, and the movable wall 30 at the lying position Pd. When the sum of the rotational moment M2 in the lying down direction due to the weight of the weight member falls below the rotational moment M1 in the standing direction of the movable wall 30 due to the biasing force of the weight member 151 (= M1a + M1b + M1c), the movable wall is moved by the biasing force of the weight member 151 30 is rotated in the standing direction.

Here, when the movable wall 30 returns to the standing direction until the inclination angle θ is 30 degrees (position Pc), the weight 151c is separated from the upper surface of the weight 151b as shown in FIG. Thereby, the urging force and the rotational moment in the standing direction of the weight member 151 become the urging force and the rotational moment M1 (= M1a + M1b) by the

weights

151a and 151b.

Further, as shown in FIG. 8, when the movable wall 30 returns to the standing direction until the inclination angle θ is 15 degrees (position Pb), as shown in FIG. 10, the weight 151b is separated from the upper surface of the weight 151a. . Thereby, the urging force and the rotational moment in the standing direction of the weight member 151 become the urging force and the rotational moment M1 (= M1a) by only one weight 151a.

In this state, the movable wall 30 is rotated to the standing position Pa as shown in FIG. As a result, the opening 24 of the frame 20 is completely opened, and the vertical hole H is automatically opened.

Here, in the second embodiment, as shown in FIG. 8, compared to the combined moment M in the first embodiment, the combined moment M in the second embodiment is ideal on the side closer to the lodging position. It approaches a composite moment (a substantially constant rotational moment regardless of the tilt angle θ). That is, in the vertical hole closing device, it is possible to approach an ideal composite moment by dividing the weight into a plurality of weights. It should be noted that the resultant moment can be made closer to the ideal resultant moment by dividing the weight more than three. In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

(Effect of 2nd Embodiment)
In the second embodiment, the following effects can be obtained.

In the second embodiment, as described above, the movable member is movable to the upper position of the vertical hole H in which a space is formed in the lower portion, and can be rotated between a lying position where the vertical hole H is closed and a standing position where the vertical hole H is opened. A wall 30 is provided, and the movable wall 30 is configured to be closed to the vertical hole H by being rotated to a lying position against the urging force of the weight member 151 by water pressure by water. Thereby, it can suppress that water flows into the space of the lower part through the vertical hole H similarly to the said 1st Embodiment. Further, the movable wall 30 is configured to be rotated to the standing position by the urging force of the weight member 151 and return to the standing position to open the vertical hole H when the water pressure decreases or disappears. Thereby, similarly to the said 1st Embodiment, according to the condition of water pressure, the opening / closing state of the vertical hole H can be switched according to a condition, without requiring manual operation.

Further, in the second embodiment, the vertical holes are formed so that the urging force by the weight member 151 gradually decreases as the number of weights contributing to the urging force decreases as the movable wall 30 moves from the lying position to the standing position. The occlusion device 200 is configured. Thereby, when the water pressure increases slightly, the movable wall 30 can be rotated in the lying down direction at an early stage, so that the water can be prevented from flowing into the lower space through the vertical hole H at an early stage. The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

[Third Embodiment]
A vertical hole closing device 300 according to a third embodiment of the present invention will be described with reference to FIGS. 5, 11, and 12. In the third embodiment, an example in which a pair of

movable walls

230a and 230b facing each other is provided will be described. In addition, the same code | symbol as 1st Embodiment is attached | subjected and illustrated to the structure similar to the said 1st Embodiment, and description is abbreviate | omitted.

(Configuration of vertical hole closing device)
As shown in FIG. 11, the vertical hole closing device 300 according to the third embodiment of the present invention includes a pair of fixed walls 10, a frame portion 220, a pair of

movable walls

230a and 230b, a pair of drums 240a, and a pair of pairs. The drum 240b includes a pair of urging portions 250a and a pair of urging portions 250b, a pair of cables 260a and a pair of cables 260b.

The frame part 220 is formed in a rectangular frame shape so as to surround the vertical hole H in plan view. Further, the frame part 220 is provided on the X1 side, and extends from the Y part in the frame part 221 extending in the Y direction to the center part in the X direction of the frame part 220 toward the X2 side. A pair of inclined frame portions 222 that extend, a frame portion 223 that is provided on the X2 side and extends in the Y direction, and both ends in the Y direction of the frame portion 223 from the center portion in the X direction of the frame portion 220 toward the X1 side. And a pair of inclined frame portions 224 extending respectively. An opening 225 communicating with the vertical hole H is formed in a portion surrounded by the

frame portions

221 and 223, the pair of inclined frame portions 222, and the pair of inclined frame portions 224.

As shown in FIG. 12, the

frame portions

221 and 223 are hardly inclined and are formed at substantially uniform height positions along the Y direction. On the other hand, the pair of inclined frame portions 222 are inclined obliquely upward (Z1 side) from the frame portion 221 (X1 side) on the movable wall 230a side toward the center portion (X2 side) in the X direction of the frame portion 220. It is provided to do. Further, the pair of inclined frame portions 224 are provided so as to be inclined obliquely upward from the frame portion 223 on the movable wall 230b side (X2 side) toward the center portion (X1 side) in the X direction of the frame portion 220. It has been. Further, the inclination angle θ of the

inclined frame portions

222 and 224 with respect to the vertical direction is about 45 degrees. The inclination angle θ is preferably about 60 degrees or less.

As shown in FIG. 11, the

movable walls

230 a and 230 b are arranged so as to constitute two opposing sides of the rectangular standing wall portion 270.

The movable wall 230a is provided adjacent to the X1 side of the frame portion 221. As shown in FIG. 12, the movable wall 230a rotates around a rotation shaft 231a provided in the vicinity of the lower end thereof, so that the wall surface on the X2 side and the standing position where the wall surface extends in the vertical direction It is comprised so that it can rotate to the lying position which touches. And in the state rotated to the fall position, the wall surface on the X2 side of the movable wall 230a abuts on substantially the whole surface of the pair of inclined frame portions 222 of the frame portion 220, and the X1 side of the opening portion 225 of the frame portion 220 is contacted. It is configured to close.

The movable wall 230b is provided adjacent to the X2 side of the frame portion 223. The movable wall 230b rotates around a rotation shaft 231b provided in the vicinity of the lower end, thereby rotating to an upright position where the wall surface extends in the vertical direction and a lying position where the X1 wall surface contacts the frame portion 220. It is configured as possible. The wall surface on the X1 side of the movable wall 230b is in contact with substantially the entire surface of the pair of inclined frame portions 224 of the frame portion 220 and closes the X2 side of the opening portion 225 of the frame portion 220 in the lying position. Has been. As a result, the vertical hole H is completely closed by closing the opening 225 of the frame 220 by the

movable walls

230a and 230b.

The pair of drums 240a is attached to the upper part of the pair of fixed walls 10 on the X1 side of the fixed wall 10, respectively. In addition, the pair of drums 240b are attached to the upper portions of the pair of fixed walls 10 on the X2 side of the fixed wall 10, respectively. Further, as shown in FIG. 11, the pair of urging portions 250 a are provided in the vicinity of the pair of fixed walls 10 on the X1 side. In addition, the pair of urging portions 250b are provided in the vicinity of the pair of fixed walls 10 on the X2 side. The pair of cables 260a connects the movable wall 230a and the weight member 51 of the urging portion 250a on the X1 side. The pair of cables 260b connects the movable wall 230b and the weight member 51 of the urging portion 250b on the X2 side.

As a result, the longitudinal hole closing device 300 not only has a substantially symmetric structure with respect to the center line extending in the X direction in plan view, but also passes through the approximate center in the X direction. It is formed so as to have a substantially symmetrical structure with respect to the center line extending in the Y direction.

Here, in the third embodiment, as shown in FIG. 5, the rotational moment M1 in the standing direction (A1a direction) of the movable wall 230a due to the urging force of the weight member 51 of the urging portion 250a and the movable wall in the lying position. The combined moment M with the rotational moment M2 (M2max) in the lying down direction (A2a direction) due to the weight of 230a is configured to always be a rotational moment in the standing direction, as in the first embodiment. Similarly, the rotation moment M1 of the movable wall 230b in the standing direction (A1b direction) due to the biasing force of the weight member 51 of the biasing portion 250b, and the rotation in the collapse direction (A2b direction) due to the weight of the movable wall 230b at the fall position. The combined moment M with the moment M2 (M2max) is configured to always be a rotational moment in the standing direction.

(Rotating motion of the movable wall)
By being configured as described above, in the normal state of the vertical hole closing device 300 in the third embodiment, as shown in FIG. 12, the urging force by the weight member 51 of the urging portion 250a is applied to the movable wall 230a. Thus, a rotational moment M1 in the rising direction (A1a direction) of the movable wall 230a is applied. Thereby, the movable wall 230a is configured to be automatically positioned at the standing position in the normal state. Similarly, a rotational moment M1 in the rising direction (A1b direction) of the movable wall 230b is applied to the movable wall 230b by the biasing force of the weight member 51 of the biasing portion 250b. Thereby, the movable wall 230b is configured to be automatically positioned at the standing position.

Then, the water pressure due to the flooding is applied from the X1 side of the movable wall 230a, and the magnitude of the rotational moment M2 in the falling direction (A2a direction) of the movable wall 230a due to the water pressure is the rising direction of the movable wall 230a by the weight member 51 ( When the magnitude of the rotational moment M1 in the A1a direction) is exceeded, the movable wall 230a is rotated to the lying down position. Similarly, the water pressure is applied from the X2 side of the movable wall 230b, and the magnitude of the rotational moment M2 in the falling direction (A2b direction) of the movable wall 230b due to the water pressure is determined by the rising direction (A1b) of the movable wall 230b by the weight member 51. When the magnitude of the rotational moment M1 in the direction) is exceeded, the movable wall 230b is rotated to the lying position. Thereby, the opening part 225 of the frame part 220 is obstruct | occluded by the

movable walls

230a and 230b, and the vertical hole H is obstruct | occluded automatically.

After that, when the water pressure due to the water is reduced or eliminated in the state where the movable wall 230a is in the lying position, the movable wall 230a stands up due to the rotational moment M1 in the standing direction (A1a direction) of the movable wall 230a by the urging force of the weight member 51. Pivoted into position. Similarly, when the water pressure due to the flooding is reduced or eliminated in the state where the movable wall 230b is in the lying position, the movable wall 230b is caused by the rotational moment M1 in the rising direction (A1b direction) of the movable wall 230b by the urging force of the weight member 51. It is turned to the standing position. Thereby, the opening part 225 of the frame part 220 is open | released by

movable wall

230a and 230b, and the vertical hole H is open | released automatically. The remaining configuration of the third embodiment is similar to that of the aforementioned first embodiment.

(Effect of the third embodiment)
In the third embodiment, the following effects can be obtained.

In the third embodiment, as described above, the movable member is movable to the upper position of the vertical hole H in which a space is formed in the lower portion, and can be rotated between a lying position for closing the vertical hole H and a standing position for opening the vertical

hole H. Walls

230a and 230b are provided, and the

movable walls

230a and 230b are configured to be turned to the lying down position against the urging force of the weight member 51 by water pressure from water to close the vertical hole H. Thereby, it can suppress that water flows into the space of the lower part through the vertical hole H similarly to the said 1st Embodiment. Further, the

movable walls

230a and 230b are configured to be rotated to the upright position by the urging force of the weight member 51 and returned to the upright position to open the vertical hole H when the water pressure decreases or disappears. Thereby, similarly to the said 1st Embodiment, according to the condition of water pressure, the opening / closing state of the vertical hole H can be switched, without requiring manual operation.

Further, in the third embodiment, the

movable walls

230a and 230b are arranged so as to constitute two opposing sides of the rectangular standing wall portion 270. Thereby, compared with the case where a movable wall comprises only one side with a movable wall, the magnitude | size of

movable walls

230a and 230b which obstruct | occlude the vertical hole H can be made small. As a result, the vertical hole closing device 300 can be reduced in size. Moreover, even if it is the vertical hole H with a large opening area, the vertical hole H can be reliably obstruct | occluded by the two

movable walls

230a and 230b which comprise two sides. The remaining effects of the third embodiment are similar to those of the aforementioned first embodiment.

[Fourth Embodiment]
A vertical hole closing device 400 according to a fourth embodiment of the present invention will be described with reference to FIGS. 5, 13, and 14. In the vertical hole closing device 400 of the fourth embodiment, an example in which a part of the configuration of the vertical hole closing device 300 of the third embodiment is arranged in the vertical hole H will be described. In addition, the same code | symbol as 3rd Embodiment is attached | subjected and illustrated to the structure similar to the said 3rd Embodiment, and description is abbreviate | omitted.

(Configuration of vertical hole closing device)
As shown in FIG. 13, the vertical hole closing device 400 according to the fourth embodiment of the present invention includes a pair of fixed walls 10, a frame portion 320, a pair of

movable walls

330a and 330b, a pair of drums 240a, and a pair of The drum 240b includes a pair of auxiliary drums 341a and a pair of auxiliary drums 341b, a pair of urging portions 250a and a pair of urging portions 250b, a pair of cables 360a and a pair of cables 360b.

The frame part 320 is fixed to the inner peripheral surface of the vertical hole H at the upper part (upper part) inside the vertical hole H. Moreover, the frame part 320 is formed in the rectangular frame shape according to the shape of the rectangular-shaped vertical hole H by planar view. Further, the frame portion 320 is provided on the X1 side in a plan view, and extends from the Y direction to the frame portion 321 extending from the Y direction to the center portion of the frame portion 320 in the X direction from the X2 side. A pair of inclined frame portions 322 extending toward the X2 side, a frame portion 323 provided on the X2 side, extending in the Y direction, and both ends of the frame portion 323 in the Y direction to a center portion in the X direction of the frame portion 320 X1 And a pair of inclined frame portions 324 each extending toward the side. An opening 325 is formed in a portion surrounded by the

frame portions

321 and 323, the pair of inclined frame portions 322, and the pair of inclined frame portions 324.

As shown in FIG. 14, both the upper surface of the frame portion 321 and the pair of inclined frame portions 322 are inclined obliquely upward from the X1 side toward the center portion (X2 side) of the frame portion 320 in the X direction. Is provided. Further, both the upper surface of the frame portion 323 and the pair of inclined frame portions 324 are provided so as to be inclined obliquely upward from the X2 side toward the center portion (X1 side) of the frame portion 320 in the X direction. The inclination angle θ with respect to the vertical direction of the upper surface of the frame portion 321, the upper surface of the inclined frame portion 322, the upper surface of the frame portion 323, and the inclined frame portion 324 is about 45 degrees. The inclination angle θ is preferably about 60 degrees or less.

Moreover, drainage holes Ca and Cb that pass through the underground structure and are connected to the ground are provided near the upper surfaces of the

frame portions

321 and 323, respectively. The drain holes Ca and Cb are provided for discharging the water accumulated on the inclined upper surfaces of the

frame portions

321 and 323 to the ground using a drainage facility (not shown).

The movable wall 330a is provided adjacent to the upper part (upper part) inside the vertical hole H and above the frame part 321 on the X1 side. The movable wall 330a rotates around a rotation shaft 331a provided in the vicinity of the lower end, so that the wall surface stands up along the vertical direction in which the vertical hole H extends and the wall surface on the X2 side is in contact with the frame portion 320. It is configured to be rotatable to a position. Then, in the state in which the movable wall 330a is rotated to the lying down position, the wall surface on the X2 side of the movable wall 330a contacts substantially the entire surface of the pair of inclined frame portions 322 of the frame portion 320, and the X1 side of the opening portion 325 of the frame portion 320 It is configured to close.

The movable wall 330b is provided adjacent to the upper part (upper part) inside the vertical hole H and above the frame part 323 on the X2 side. The movable wall 330b rotates around a rotation shaft 331b provided in the vicinity of the lower end, so that the wall surface stands up along the vertical direction in which the vertical hole H extends, and the wall surface on the X1 side is in contact with the frame portion 320. It is configured to be rotatable to a position. And in the state rotated to the fall position, the wall surface on the X1 side of the movable wall 330b is in contact with substantially the entire surface of the pair of inclined frame portions 324 of the frame portion 320, and the X2 side of the opening portion 325 of the frame portion 320 is moved. It is configured to close. As a result, the vertical hole H is completely closed by closing the opening 325 of the frame 320 by both the

movable walls

330a and 330b.

Further, the upper end surfaces of the

movable walls

330a and 330b are configured to be located above the ground surface S (Z1 side). Thus, the water pressure is applied to the

movable walls

330a and 330b when the water at the time of flooding contacts the wall surfaces of the

movable walls

330a and 330b exposed to the ground.

The pair of auxiliary drums 341a are respectively disposed below the pair of drums 240a (Z2 side) on the X1 side. A pair of cables 360a are hung on the pair of auxiliary drums 341a, respectively. Similarly, the pair of auxiliary drums 341b are respectively disposed below the pair of drums 240b on the X2 side. A pair of cables 360b are hung on the pair of auxiliary drums 341b, respectively. The pair of cables 360a connects the movable wall 330a and the weight member 51 of the urging portion 250a via the pair of drums 240a and the pair of auxiliary drums 341a on the X1 side, respectively. Similarly, the pair of cables 360b connect the movable wall 330b and the weight member 51 of the biasing portion 250b via the pair of drums 240b and the pair of auxiliary drums 341b, respectively, on the X2 side.

As a result, the vertical hole closing device 400 not only has a substantially symmetrical structure with respect to the center line extending in the X direction in plan view, but also passes through the approximate center in the X direction. It is formed so as to have a substantially symmetrical structure with respect to the center line extending in the Y direction.

Here, in the fourth embodiment, as shown in FIG. 5, the rotational moment M1 in the standing direction (A1a direction) of the movable wall 330a due to the biasing force of the weight member 51 of the biasing portion 250a and the movable wall in the lying position. The combined moment M with the rotational moment M2 (M2max) in the lying down direction (A2a direction) due to the weight of 330a is configured so as to always be a rotational moment in the standing direction, as in the first and third embodiments. Has been. Similarly, the rotation moment M1 of the movable wall 330b in the standing direction (A1b direction) due to the biasing force of the weight member 51 of the biasing portion 250b, and the rotation in the lying down direction (A2b direction) due to the weight of the movable wall 330b at the fall position. The combined moment M with the moment M2 (M2max) is configured to always be a rotational moment in the standing direction. In addition, the other structure of 4th Embodiment and the rotation operation of

movable wall

330a and 330b are the same as that of the said 3rd Embodiment.

(Effect of 4th Embodiment)
In the fourth embodiment, the following effects can be obtained.

In the fourth embodiment, as described above, in the upper part in the vertical hole H in which the space is formed in the lower part, it is possible to rotate to the lying position for closing the vertical hole H and the standing position for opening the vertical hole H. The

movable walls

330a and 330b are provided, and the

movable walls

330a and 330b are configured to be pivoted to the lying down position against the urging force of the weight member 51 by water pressure by water to close the vertical hole H. Thereby, it can suppress that water flows into the space of the lower part through the vertical hole H similarly to the said 3rd Embodiment. Further, the

movable walls

330a and 330b are configured to be rotated to the upright position by the urging force of the weight member 51 and returned to the upright position to open the vertical hole H when the water pressure decreases or disappears. Thereby, similarly to the said 3rd Embodiment, according to the condition of water pressure, the opening / closing state of the vertical hole H can be switched, without requiring manual operation.

Moreover, in 4th Embodiment, the space which arrange | positions the frame part 320 and the

movable walls

330a and 330b on the ground is ensured by arrange | positioning the frame part 320 and the

movable walls

330a and 330b in the inside of the vertical hole H. Since it is not necessary, the space occupied by the vertical hole closing device 400 in the ground portion can be further reduced. The remaining effects of the fourth embodiment are similar to those of the aforementioned third embodiment.

[Modification]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.

For example, in the first to fourth embodiments, the vertical hole closing device 100 (200, 300, 400) of the present invention is connected to the vertical hole H that connects the space of an underground structure such as an underground mall and a subway tunnel and the ground. Although an applied example has been shown, the present invention is not limited to this. The vertical hole closing device of the present invention is not limited to the case where it is applied to a vertical hole that connects an underground space and the ground, but connects a lower floor and an upper floor (including a rooftop) in a structure provided on the ground. The vertical hole closing device of the present invention may be applied to the vertical hole. Thereby, when water leakage etc. generate | occur | produce in an upper floor, it is possible to suppress that a liquid flows into a lower floor through a vertical hole by the vertical hole obstruction | occlusion apparatus of this invention.

In the first to fourth embodiments, the vertical hole H extends in the vertical direction. However, the present invention is not limited to this. In the present invention, the vertical hole may be formed so as to extend while being inclined in the vertical direction. Moreover, a part of the vertical hole may have a portion extending in a direction orthogonal to the vertical direction.

In the first to fourth embodiments, the “liquid” in the claims is “water”, but the present invention is not limited to this. The “liquid” in the claims is not limited to water as long as it is liquid, and may be, for example, oil and liquid medicine.

In the first to fourth embodiments, the weight member 51 (151) is used as the “biasing member” in the claims, but the present invention is not limited to this. In the present invention, for example, a spring may be used as the biasing member. Note that the biasing force can be changed linearly by using a spring as the biasing member. A plurality of types of springs having different spring constants may be used. Moreover, you may use together a weight member and a spring. At this time, the weight member and the spring are preferably combined so as to approach an ideal combined moment (a substantially constant rotational moment regardless of the inclination angle) as shown in FIG.

In the second embodiment, of the plurality (three) of the

weights

151a, 151b and 151c, the weight of the weight 151a is larger than the weight of the weight 151b, and the weight of the weight 151b is larger than the weight of the weight 151c. Although an example configured to be large has been shown, the present invention is not limited to this. In the present invention, for example, the weights of the plurality of weights may be substantially the same.

In the first to fourth embodiments, the vertical hole H has a rectangular shape in plan view, but the present invention is not limited to this. In the present invention, the planar shape of the vertical hole is not particularly limited. For example, the vertical hole may have a circular shape, an elliptical shape, a polygonal shape, or the like in plan view.

In the first to fourth embodiments, the example in which the movable wall 30 (230a, 230b, 330a, 330b) is a flat plate is shown, but the present invention is not limited to this. In the present invention, the shape of the movable wall is not particularly limited as long as the movable wall can block the vertical hole.

In the first to fourth embodiments, the example in which the movable wall 30 (230a, 230b, 330a, 330b) contacts the frame portion 20 (220, 320) has been described. However, the present invention is not limited to this. . In the present invention, the frame portion may not be provided. In this case, it is preferable that the movable wall is configured to be larger than the opening shape of the vertical hole so that the movable wall directly closes the vertical hole.

In the first to fourth embodiments, an example in which the frame portion 20 (220, 320) has an inclined portion is shown, but the present invention is not limited to this. In the present invention, the frame portion may be arranged in a horizontal plane without being inclined.

In the first to fourth embodiments, an example in which the drum 40 (240a, 240b) is used to set the direction of the urging force of the weight member 51 acting in the vertical direction to the movable wall 30 in the standing direction (A1 direction). However, the present invention is not limited to this. For example, by using a turning pulley, the direction of the urging force of the weight member acting in the vertical direction may be set to the upright direction of the movable wall.

In the first to fourth embodiments, an example in which a pair of urging portions 50 (150, 250a, 250b) is provided for one movable wall 30 (230a, 230b, 330a, 330b) is shown. However, the present invention is not limited to this. In the present invention, without providing a pair of urging portions (biasing members) for one movable wall, one urging portion (biasing member) is provided for one movable wall. Also good. In this case, in FIGS. 2, 11 and 13, only the urging portion on one side in the Y direction may be left and the urging portion on the other side may be deleted. Moreover, you may provide three or more urging | biasing parts (biasing member) with respect to one movable wall.

10

Fixed wall

20, 220, 320 Frame portion 23 Fixed frame portion (fixed wall, support wall)
24, 225, 325

Opening

30, 230a, 230b, 330a, 330b Movable wall 51, 151 Weight member (biasing member)
70, 270

Standing wall portion

100, 200, 300, 400 Vertical

hole closing device

151a, 151b, 151c Weight H Vertical hole

Claims

A movable wall (30) provided at an upper portion of a vertical hole (H) in which a space is formed at a lower portion and rotatable to a lying position that closes the vertical hole and an upright position that opens the vertical hole;
A biasing member (51) for biasing the movable wall so as to be positioned at the standing position;
The movable wall is rotated to the lying position against the urging force of the urging member due to the liquid pressure of the liquid to close the vertical hole, and when the liquid pressure decreases or disappears, A vertical hole closing device (100) configured to be rotated to the standing position by a biasing force of a biasing member, to return to the standing position and to open the vertical hole.
Further comprising a standing wall (70) provided in an upper portion of the vertical hole and having a rectangular shape in plan view;
The vertical hole closing device according to claim 1, wherein the movable wall is arranged so as to constitute at least one side of the rectangular standing wall portion in plan view.
In the upper part of the vertical hole, a frame part (20) provided obliquely upward from the movable wall side to the side opposite to the movable wall and having an opening (24) corresponding to the vertical hole is provided. In addition,
The vertical hole closing device according to claim 1, wherein the movable wall is configured to close the vertical hole by closing the opening of the frame portion at the lying down position.
A support wall (23) for supporting the frame portion in an inclined state;
The vertical hole closing device according to claim 3, wherein the support wall is disposed so as to constitute a fixed wall (10) of a standing wall portion provided at an upper portion of the vertical hole.
The biasing member includes a weight member (151),
The weight member includes a plurality of weights (151a, 151b, 151c), and the weight of the weight that contributes to an urging force among the plurality of weights as the movable wall moves from the lying position to the standing position. The longitudinal hole closing device according to claim 1, wherein the urging force is gradually reduced as the number decreases.
The vertical hole closing device according to claim 2, wherein the movable wall is arranged so as to constitute two opposite sides of the rectangular standing wall portion in plan view.