TW201837276A - Flap gate - Google Patents

Abstract

A torsion coil spring (31) of a flap gate (1) is arranged below an upper surface of a door body (2) in a collapsed posture. The torsion coil spring (31) includes a coil part (32), a first arm (33), and a second arm (34). In the coil part (32), a spring material is helically wound about a central axis (J2) oriented in the width direction of the door body (2). The first arm (33) projects from the coil part (32). A tip end part of the first arm (33) is connected to a floor surface (91). The second arm (34) projects from the coil part (32). A tip end part of the second arm (34) is connected to the door body (2). In the flap gate (1), in a state where the door body (2) is in a collapsed posture, a standing moment is applied to the door body (2) by the restoration force of the torsion coil spring (31). In a state where the door body (2) is in a maximum standing posture, a collapsing moment is applied to the door body (2) by the restoration force of the torsion coil spring (31).

Description

Rolling gate

The present invention relates to an undulating door that rises when water flows in from an opening to shield the opening.

In the past, in order to prevent water from entering the building during flooding, a waterproof door that is undulated by a hinge is often provided at the entrance and exit of the building. In Japanese Patent Publication No. Hei 10-238240 (Document 1), a standing assisting device is proposed which uses a torsion coil spring fixed to the ground in a undulating door which is undulating by a worker. Apply a standing moment. One arm of the torsion coil spring in a natural state is extended and fixed to the ground along the ground level, and the other arm extends upward. Further, a roller is provided at the front end portion of the other arm, and the roller is in contact with the lower surface of the waterproof door. If the waterproof door is laid down, the torsion coil spring is compressed, and the torsion coil spring applies a rising moment to the waterproof door. Further, when the posture of the waterproof door is changed, the contact point between the front end portion of the other arm and the waterproof door moves in the longitudinal direction of the waterproof door, but since the roller is provided at the contact point, the movement of the contact point is smoothed. Conducted.

Also, in Japanese Patent Laid-Open Publication No. 2006-83595 (Document 2), a standing assisting device is proposed which is waterproofed by a torsion coil spring fixed to the ground in an undulating door which is undulating by a worker. The door applies a standing moment. In the erecting assisting device, the torsion coil spring is not used while the waterproof door in the lodging posture rises up to a predetermined angle, and the erecting moment is applied to the waterproof door by the gas regulator. Further, when the waterproof door rises above a predetermined angle, the standing torque is stopped by the gas regulator, and the rising moment is applied to the waterproof door through the torsion coil spring.

In Japanese Laid-Open Patent Publication No. 2007-170112 (Document 3), a technique of applying a rising moment to a waterproof door by a torsion coil spring fixed to the ground in an undulating door that is undulated by an electric motor is proposed. The front end portion of one of the torsion coil springs is fixed to the ground, and the front end portion of the other arm is fixed to the door main body.

On the other hand, in the floating undulation gate provided in the opening of the tidal dam or the like, when the water rises due to a tsunami or the like, the door body stands up by the pressure of the water flowing in from the opening and shields the opening. However, at the initial stage of water inflow, the water pressure acting on the undulating door is relatively small, so the erecting action of the undulating door is relatively slow. In addition, there is also a case where the water level drops after the water rises, and the undulation does not perform the lodging operation until the water level drops to a certain level, and the water level is suddenly lowered after the water level drops to a certain extent.

Therefore, in the floating type hinged door of Japanese Patent Laid-Open Publication No. 2015-180806 (Document 4), in order to promote the door body standing in the lodging posture, the door body that promotes the standing posture is lowered when the water level is lowered, and a kind of lodging is proposed. The technique of installing a counterweight on the door.

However, in the undulating door provided in the tidal dam or the like, some vehicles pass through the door body in the lodging posture when the water is raised. In such a undulating door, it is necessary to increase the strength of the door body, thus increasing the weight of the door body. Therefore, if the structure of Document 4 is applied, the weight of the weight is increased. As a result, the span length of the door body is limited, or the thickness of the door body is increased in order to secure the cross section of the member at the front end portion of the door body.

On the other hand, in the erecting aids of Documents 1 to 3, the erecting moment is always applied to the waterproof door regardless of the posture of the waterproof door. Therefore, when the waterproof door in the standing posture is in the lodging posture, it is necessary to apply a large force to the waterproof door. Therefore, the structures of Documents 1 to 3 are difficult to apply to the above-described floating body type hinged door which starts the lodging of the door body which promotes the standing posture when the water level is lowered.

Prior art literature

Patent Document 1: Japanese Patent Publication No. Hei 10-238240

Patent Document 2: Japanese Patent Publication No. 2006-83595

Patent Document 3: Japanese Patent Publication No. 2007-170112

Patent Document 4: Japanese Patent Publication No. 2015-180806

(1) Technical problems to be solved

An object of the present invention is to simplify the structure of an undulating door in a undulating door that is provided in the opening and that rises when water flows in from the opening to shield the opening.

(2) Technical plan

The undulating door of the present invention is provided with a door body in which the movable end portion is located on the side which is the water inflow from the support end portion, that is, the front side, and is rotated by the support end portion as a fulcrum. The posture between the falling posture and the maximum standing posture is changed; and the relief assisting portion includes a torsion coil spring disposed on a lower side of the upper surface of the door body in the lodging posture. The torsion coil spring is provided with a spiral portion which is formed by spirally winding a spring member centering on a central axis in a width direction of the door body, and a first arm protruding from the spiral portion and having a front end The portion is coupled to the ground; and a second arm that protrudes from the spiral portion and the front end portion is coupled to the door body. In a state in which the door body is in the lodging posture, a rising moment is applied to the door body by the restoring force of the torsion coil spring. In a state where the door body is in the maximum standing posture, a lodging torque is applied to the door body by the restoring force of the torsion coil spring. Thereby, the structure of the undulating door can be simplified.

In a preferred embodiment of the present invention, the torsion coil spring is disposed on the front side of the support end. The first arm and the second arm extend from the spiral portion toward the front side in a state in which the door body is in the lodging posture, and the first arm and the second arm The angle is smaller than the free angle. The first arm extends from the spiral portion toward the front side, and the second arm extends upward from the spiral portion in a state where the door body is in the maximum standing posture, the first The angle formed by the arm and the second arm is greater than the angle of freedom.

Preferably, in a state in which the door body is in the lodging posture, an extension line of the second arm and the second arm toward the front side is from the first arm and the ground The connecting portion, that is, the entire length of the range from the first connecting portion to the spiral portion, is located above the first arm or at the same position as the first arm in the vertical direction.

Alternatively, in a state in which the door body is in the lodging posture, an extension line of the second arm or the second arm toward the front side is viewed from a side facing the width direction and the first Arms crossed.

In another preferred embodiment of the present invention, the door body includes a buoyancy portion located between the first arm and the second arm in the width direction.

In another preferred embodiment of the present invention, the undulating door further includes a rope-like or strip-shaped standing limit connecting the front end portion of the first arm and the front end portion of the second arm component. The standing restraining member extends linearly in a state where the door body is in the maximum standing posture.

In other preferred embodiments of the present invention, the torsion coil spring is disposed on a rear side of the fulcrum. The first arm extends downward from the spiral portion in a state in which the door body is in the lodging posture, and the second arm extends from the spiral portion toward the rear side, the first arm The angle with the second arm is greater than the angle of freedom. The first arm and the second arm extend downward from the spiral portion in a state where the door body is in the maximum standing posture, and the first arm and the second arm The angle is smaller than the free angle.

In another preferred embodiment of the present invention, the spiral portion is non-fixed with respect to the ground and the door body, and the spiral portion is opposite to the ground and the posture of the door body. The relative position of the door body is changed.

In other preferred embodiments of the present invention, the undulating door further has a weight; and a connecting member that connects the weight with the movable end of the door body and suspends the weight . A erecting moment is applied to the door body by the weight in a state in which the door body is in the lodging posture. A lodging torque is applied to the door body by the weight in a state where the door body is in the maximum standing posture.

(3) Beneficial effects

The above and other objects, features, aspects and advantages of the present invention will become more apparent by referring

Fig. 1 is a side view showing a undulating door 1 according to a first embodiment of the present invention. 2 is a plan view showing the undulating door 1. Fig. 3 is a front elevational view of the undulating door 1 as seen from the front. The undulating door 1 is a floating type undulating door. The undulating door 1 is provided, for example, on the ground 91 (for example, a road surface) at the opening portion 92 of the levee. When the water flows into the opening portion 92 due to the rising of the water, the undulating door 1 rises and shields the opening portion 92 by the pressure of the inflowing water, thereby suppressing the flow of water from the opening portion 92 into the living space or the like. In the example shown in Figure 1, the ground 91 expands substantially horizontally (i.e., substantially perpendicular to the direction of gravity).

In the following description, the side in which the water flows in when the water rises in the undulating door 1 (that is, the upstream side in the inflow direction of the water, for example, closer to the water side of the sea or the river than the valve door 1) is referred to as a "front side". The downstream side of the inflow direction of the water in the undulating door 1 (for example, closer to the land side than the louver 1) is referred to as a "rear side". That is, the left-right direction in FIGS. 1 and 2 is the "front-rear direction", and the left side and the right side in FIGS. 1 and 2 are "front side" and "rear side", respectively. In addition, the up-down direction in FIG. 2 and the left-right direction in FIG. 3 are called "width direction". The width direction is perpendicular to the front-rear direction, and the front-rear direction and the width direction are perpendicular to the up-and-down direction. The vertical direction in FIGS. 1 and 3 is substantially parallel to the direction of gravity.

The undulating door 1 includes a door body 2, a pair of door stop portions 11, and an undulation assisting portion 3. The door body 2 shown in FIGS. 1 to 3 is a substantially rectangular parallelepiped member that expands in the front-rear direction and the width direction. In Figs. 1 to 3, a state in which the door body 2 is laid down on the floor 91 is shown. In the following description, the posture of the door body 2 indicated by a solid line in FIG. 1 is referred to as a "downward posture". The door body 2 in the lodging posture is housed in the recessed portion 93 provided in the floor surface 91. The concave portion 93 is slightly larger than the door body 2 in the lodging posture in plan view.

The upper surface of the door body 2 in the lodging posture (hereinafter referred to as "first main surface 21") is substantially the same in the vertical direction from the position of the floor 91 around the recess 93 in the vertical direction. For example, on the first main surface 21 of the door body 2 in the lodging posture, a vehicle or the like can pass. The lower surface of the door body 2 in the lodging posture (hereinafter referred to as "second main surface 22") is in contact with or close to the bottom surface of the concave portion 93 of the floor surface 91. Further, in the case where the lower end of the door body 2 in the lodging posture is not provided with a plate material (that is, a plate material extending in the front-rear direction and the width direction), the second main surface 22 of the door body 2 means from the first main surface 21 The lower end surface of the beam member or the like extending downward. In the example shown in FIG. 1, the bottom surface of the concave portion 93 which is a part of the floor surface 91 also expands substantially at a level.

The rear end portion 23 of the door body 2 in the lodging posture is rotatably attached to the floor 91 at the rear end portion of the recess portion 93, and is supported by the floor 91. In the following description, the rear end portion 23 of the door body 2 in the lodging posture is referred to as a "support end portion 23". Further, the front end portion 24 of the door body 2 in the lodging posture is referred to as a "movable end portion 24". That is, in the door body 2 in the lodging posture, the movable end portion 24 is located on the front side of the support end portion 23. In the following description, the direction in which the support end portion 23 and the movable end portion 24 of the door body 2 are perpendicular to the width direction is referred to as the "longitudinal direction" of the door body 2. In the door body 2 in the lodging posture, the longitudinal direction of the door body 2 is the same as the front-rear direction.

The door body 2 is rotated clockwise in FIG. 1 around the rotation axis J1 extending substantially parallel to the width direction in the support end portion 23, and the movable end portion 24 is separated upward from the floor surface 91 and stands up. The rotation axis J1 is located near the rear end edge of the first main face 21 of the door body 2. In the example shown in FIG. 1, the door body 2 can be raised to an angle of about 75 degrees with respect to the floor surface 91 as indicated by a chain double-dashed line. In the following description, the posture of the door body 2 indicated by a chain double-dashed line in FIG. 1 is referred to as a “maximum standing posture”. In the undulating door 1, the door body 2 is rotated by the support end portion 23 as a fulcrum, and the posture is changed between the falling posture and the maximum standing posture. Further, the angle between the door body 2 in the maximum standing posture and the floor surface 91 can be appropriately set within a range larger than 0 degrees and 90 degrees or less.

The pair of door stoppers 11 are disposed on both sides in the width direction of the door body 2. In FIG. 1, the illustration of the door stop portion 11 closer to the front side than the door body 2 is omitted. As shown in FIG. 3, the space between the pair of door stoppers 11 is the above-described opening portion 92. The door stop portion 11 is, for example, a plate-like structure. For example, a moisture barrier is provided on the outer side in the width direction of the pair of door stopper portions 11. A pair of door stops 11 are fixed to the moisture barrier.

The side surface of the door body 2 is in contact with the door body contact surface 111 which is the side surface in the width direction of the door stopper portion 11. Specifically, a sealing member (for example, watertight rubber) (not shown) is provided on the side surfaces on both sides in the width direction of the door body 2 over substantially the entire length in the longitudinal direction of the door body 2. The door body 2 is in contact with the door body contact surface 111 of the shutter portion 11 via the sealing member. The door member 2 and the gate portion 11 are watertightly sealed by the sealing member. In the undulating door 1, regardless of the posture of the door body 2, the side surface of the door body 2 is in contact with the door body contact surface 111 to maintain watertightness between the door body 2 and the gate portion 11.

The door body 2 has a plurality of longitudinal beams 27 extending substantially in parallel in the longitudinal direction between the first main surface 21 and the second main surface 22. Each of the side members 27 extends over substantially the entire length between the support end portion 23 of the door body 2 and the movable end portion 24. The plurality of stringers 27 are separated from each other and arranged in the width direction. In the example shown in FIGS. 2 and 3, six longitudinal members 27 are provided in the door body 2. The space on the lower side of the first main surface 21 of the door body 2 in the lodging posture is divided into six spaces 201 arranged in the width direction by the six stringers 27. In the following description, the space 201 is referred to as "divided space 201". Each of the divided spaces 201 is a space having a substantially rectangular parallelepiped shape.

The undulation assisting portion 3 includes a torsion coil spring 31. In the example shown in FIGS. 2 and 3, the undulating auxiliary portion 3 includes six torsion coil springs 31. Each of the torsion coil springs 31 is disposed on the lower side of the first main surface 21 of the door body 2 in the lodging posture on the front side of the support end portion 23 of the door body 2. In FIGS. 2 and 3, in order to easily understand the shape of the torsion coil spring 31, the torsion coil spring 31 located on the lower side of the first main surface 21 is drawn with a thin solid line (the same applies to FIGS. 21 and 22). . The six torsion coil springs 31 are separated from each other at substantially the same position in the front-rear direction and are arranged in the width direction. The six torsion coil springs 31 have substantially the same structure. The number of torsion coil springs 31 included in the undulation assisting portion 3 can be appropriately changed. The number of the torsion coil springs 31 may be one, for example, two or more.

The torsion coil spring 31 is disposed between the longitudinal beams 27 of the door body 2 in the lodging posture. In the example shown in FIG. 3, a torsion coil spring 31 is disposed in the first, third, fifth, and seventh divided spaces 201 from the left side in the drawing. That is, the torsion coil spring 31 is disposed inside the door body 2 in the lodging posture. In the third and fifth divided spaces 201 from the left side in Fig. 3, two torsion coil springs 31 are disposed, respectively. On the second main surface 22 side of the divided space 201 in which the torsion coil spring 31 is disposed, no plate member is provided, but is opened toward the lower side in FIG.

The divided space 201 in which the torsion coil spring 31 is not disposed (that is, the second, fourth, and sixth divided spaces 201 from the left side in FIG. 3) is used, for example, as a buoyancy portion. The buoyancy portion includes, for example, a buoyant body such as a foamed resin disposed in a space between the first main surface 21 and the second main surface 22 . Further, the buoyancy portion may include a watertight space provided between the first main surface 21 and the second main surface 22.

Fig. 4 is a perspective view showing, in an enlarged manner, a torsion coil spring 31. The rightmost torsion coil spring 31 of Fig. 3 is depicted in Fig. 4. In addition, the structure around the torsion coil spring 31 is also shown in FIG. The torsion coil spring 31 includes a spiral portion 32, a first arm 33, and a second arm 34. The spiral portion 32 is a substantially cylindrical portion centering on the central axis J2 in the width direction of the door body 2. In the spiral portion 32, the spring member is spirally wound around a central axis J2 substantially parallel to the width direction.

The first arm 33 and the second arm 34 protrude from the spiral portion 32, respectively. The first arm 33 and the second arm 34 respectively extend from the spiral portion 32 to the front side in a state where the door body 2 is in the lodging posture. In the example shown in FIG. 4, the first arm 33 extends forward from the lower portion of the spiral portion 32, and the second arm 34 extends forward from the upper portion of the spiral portion 32. The first arm 33 and the second arm 34 extend in a substantially tangential direction from the spiral portion 32 when viewed from the side in the width direction. The length of the first arm 33 is substantially the same as the length of the second arm 34.

The front end portion of the first arm 33 is bent at a substantially right angle and extends in a direction away from the spiral portion 32 in the width direction. The front end portion of the first arm 33 is inserted into a hole of the connecting portion 94 fixed to the floor surface 91 (i.e., the bottom portion of the recess portion 93). Thereby, the front end portion of the first arm 33 is connected to the floor surface 91 via the connection portion 94. The connecting portion 94 is made of, for example, metal, and is fixed to the floor 91 by bolts or the like. In the following description, the connection portion between the first arm 33 and the floor surface 91 is referred to as a "first connection portion 331". The first connecting portion 331 is, for example, a hole into which the connecting portion 94 of the front end portion of the first arm 33 is inserted.

The front end portion of the second arm 34 is bent at a substantially right angle toward the opposite direction of the front end portion of the first arm 33, and extends in a direction away from the spiral portion 32 in the width direction. The front end portion of the second arm 34 is inserted into a hole provided in the side member 27 of the door body 2. Thereby, the front end portion of the second arm 34 is connected to the door body 2. In the following description, the connection portion between the second arm 34 and the door body 2 will be referred to as a "second connection portion 341". The second connecting portion 341 is, for example, a hole into which the side member 27 of the front end portion of the second arm 34 is inserted.

The spiral portion 32 is not fixed to the floor 91 and the door body 2, but is indirectly connected to the floor 91 and the door body 2 via the first arm 33 and the second arm 34. As shown in FIG. 1, in a state in which the door body 2 is in the falling posture, the spiral portion 32 is separated upward from the floor surface 91 (that is, the bottom surface of the recess portion 93), and is separated downward from the first main surface 21 of the door body 2.

In a state where the door body 2 is in the lodging posture, the angle formed by the first arm 33 and the second arm 34 is smaller than the free angle. In other words, the torsion coil spring 31 is compressed more than the free state. Therefore, in the state in which the door body 2 is in the falling posture, the door body 2 is applied with a moment acting in a direction in which the door body 2 stands up (hereinafter referred to as "standing torque") by the restoring force of the torsion coil spring 31. Further, the angle formed by the first arm 33 and the second arm 34 is an angle when the first arm 33 and the second arm 34 are viewed from the side in the direction in which the central axis J2 of the spiral portion 32 faces. In addition, the angle formed by the first arm 33 and the second arm 34 is zero when the first arm 33 and the second arm 34 are parallel when viewed from the side, and with the first arm 33 and the second arm 34 approaches and becomes smaller under side observation.

In a state in which the door body 2 is in the falling posture, the position of the first connecting portion 331 in the vertical direction is substantially the same as the position of the second connecting portion 341 in the vertical direction. Further, the distance between the first connecting portion 331 and the central axis J2 in the front-rear direction is substantially the same as the distance between the second connecting portion 341 and the central axis J2 in the front-rear direction.

In a state in which the door body 2 is in the lodging posture, the second arm 34 is located above the first arm 33 over the entire length of the longitudinal direction of the first connecting portion 331 to the spiral portion 32, or is located at the first arm 33 is substantially the same position in the up and down direction. In other words, the first arm 33 and the second arm 34 do not intersect between the first connecting portion 331 and the spiral portion 32 when viewed from the side. Preferably, the second arm 34 coincides with a line connecting the rotating shaft J1 and the second connecting portion 341 when viewed from the side.

In the undulating door 1, the second arm 34 may be shorter than the first arm 33. That is, the second connection portion 341 may be located on the rear side of the first connection portion 331. In this case, the extension line of the front side of the second arm 34 and the second arm 34 is located above the first arm 33 over the entire length of the longitudinal direction of the first connecting portion 331 to the spiral portion 32. Or it is located at substantially the same position as the first arm 33 in the up and down direction. In other words, the extension line between the first arm 33 and the second arm 34 and the second arm 34 does not intersect between the first connecting portion 331 and the spiral portion 32 when viewed from the side. Further, in the undulating door 1, the first connecting portion 331 may be located further rearward than the second connecting portion 341.

Next, the case where the door body 2 is raised will be described with reference to Figs. 5 to 9 . FIG. 10 is a view showing the relationship between the posture of the door body 2 and the moment acting on the door body 2. The horizontal axis in Fig. 10 indicates the angle of the door body 2 with respect to the ground 91 (hereinafter simply referred to as "the angle of the door body 2"). The angle of the door body 2 is 0 degrees when the door body 2 is in the lodging posture, and is 90 degrees when the door body 2 stands up perpendicularly to the ground 91. The vertical axis in Fig. 10 is positive in the counterclockwise direction in Fig. 1, and represents the moment acting on the rotational axis J1 of the door body 2. That is, the positive moment in Fig. 10 is a moment acting in a direction in which the door body 2 is laid down (hereinafter referred to as "falling moment"), and the negative moment is a standing moment acting in a direction in which the door body 2 stands up. .

A broken line 81 in FIG. 10 is a moment due to the own weight of the door body 2, and a solid line 82 is a moment applied to the door body 2 by the undulating auxiliary portion 3. The thick solid line 83 in Fig. 10 is the total torque of the line 81 and the line 82. In the case where the angle of the door body 2 is 0 degrees (that is, the case where the door body 2 is in the lodging posture), the absolute value of the lodging moment due to the own weight of the door body 2 is larger than that of the relief assisting portion 3 due to the compressed state. The absolute value of the rising torque is large.

As shown in FIG. 5, when the water 90 flows into the undulating door 1, the floating force is applied to the door body 2 by the buoyancy or the like generated by the water 90 to the door body 2, and the door body 2 starts to stand up. At this time, in addition to the rising moment generated by the water 90, the door body 2 acts on the lodging torque due to the own weight of the door body 2 and the rising moment due to the restoring force of the torsion coil spring 31.

The rising moment generated by the torsion coil spring 31 continues to act on the door body 2 in the posture of the door body 2 from the posture shown in FIG. 5 to the posture shown in FIG. Thereby, the auxiliary door body 2 stands up, and the rising speed of the door body 2 increases. As a result, it is possible to prevent the water 90 from flowing in from the opening portion 92 beyond the door body 2. In the state shown in Fig. 7, the torsion coil spring 31 is in a free state which is not compressed and stretched. In other words, the angle formed by the first arm 33 and the second arm 34 of the torsion coil spring 31 is a free angle.

In the following description, the posture of the door body 2 shown in FIG. 7 is referred to as an "intermediate posture". Further, the angle between the door body 2 in the intermediate posture and the floor surface 91 (that is, the bottom surface of the recessed portion 93) is referred to as an "intermediate angle". The intermediate angle is larger than 0 degrees, and is smaller than the angle (about 75 degrees in the above example) of the door body 2 and the floor 91 in the maximum standing posture. In other words, the intermediate posture is the posture between the lodging posture and the maximum standing posture. The intermediate angle is, for example, 5 degrees or more and 70 degrees or less. In the example shown in Figure 7, the intermediate angle is about 45 degrees. The intermediate angle of the door body 2 and the free angle of the torsion coil spring 31 can be appropriately changed.

In a state where the door body 2 is between the lodging posture and the intermediate posture, as the angle of the door body 2 becomes larger, in the torsion coil spring 31 in the compressed state, the angle between the first arm 33 and the second arm 34 gradually becomes When increased, the absolute value of the rising moment applied to the door body 2 by the torsion coil spring 31 is gradually decreased. Further, since the spiral portion 32 is not fixed to the floor surface 91 and the door body 2, it moves upward and away from the door body 2 as the angle of the door body 2 increases. In other words, as the posture of the door body 2 is changed, the relative position of the spiral portion 32 with respect to the floor surface 91 and the door body 2 is changed. When the door body 2 is raised to the intermediate posture, as described above, the compression of the torsion coil spring 31 is released, and the moment applied to the door body 2 by the restoring force of the torsion coil spring 31 actually becomes zero.

When the door body 2 stands up beyond the intermediate posture, the angle between the first arm 33 and the second arm 34 of the torsion coil spring 31 is larger than the free angle, and the torsion coil spring 31 is in a stretched state. Thereby, the lodging moment due to the restoring force of the torsion coil spring 31 acts on the door body 2. The lodging moment generated by the torsion coil spring 31 continues to act on the door body in the posture of the door body 2 from the intermediate posture shown in FIG. 7 through the posture shown in FIG. 8 to the maximum standing posture shown in FIG. 2. As shown in FIG. 9, in a state in which the door body 2 is in the maximum standing posture, the first arm 33 of the torsion coil spring 31 extends from the spiral portion 32 to the front side, and the second arm 34 extends upward from the spiral portion 32.

In a state where the door body 2 is located between the intermediate posture and the maximum standing posture, the door body 2 acts on the standing moment due to the water 90, the lodging moment due to the own weight of the door body 2, and the torsion coil spring. The lodging torque generated by 31. Actually, the lodging torque due to the self-weight of the torsion coil spring 31 also acts on the door body 2, but the torsion coil spring 31 is relatively light, so in the following description, the lodging torque due to the self-weight of the torsion coil spring 31 is ignored. . In a state where the door body 2 is between the intermediate posture and the maximum standing posture, as the angle of the door body 2 becomes larger, the angle between the first arm 33 and the second arm 34 of the torsion coil spring 31 gradually increases. The absolute value of the lodging moment applied to the door body 2 by the torsion coil spring 31 is gradually increased. Further, the spiral portion 32 moves upward and away from the door body 2 as the angle of the door body 2 increases. In other words, as the posture of the door body 2 is changed, the relative position of the spiral portion 32 with respect to the floor surface 91 and the door body 2 is changed.

In the undulating door 1, the erecting speed of the door body 2 is suppressed by acting on the door body 2 due to the lodging moment generated by the torsion coil spring 31 during the rise of the door body 2 from the intermediate posture to the maximum erect posture. As shown in FIG. 9, in the state in which the door body 2 is in the maximum standing posture, the lodging torque generated by the torsion coil spring 31 is equalized with the water pressure acting on the door body 2. In other words, the angle of the door body 2 in the maximum standing posture is determined by the lodging torque generated by the torsion coil spring 31 and the water pressure acting on the door body 2. Further, as shown in FIG. 7, in a state where the door body 2 stands up to the intermediate posture, since the water surface of the water 90 is located below the movable end portion 24 (ie, the tip end) of the door body 2, even if the door body 2 is The rising speed is suppressed, and the water 90 does not flow in from the opening portion 92 beyond the movable end portion 24 of the door body 2. In the undulating door 1, a structure such as a tie rod that restricts the door body 2 from rising beyond a predetermined angle may be provided. Thereby, it is possible to further reliably prevent the angle of the door body 2 from being larger than the predetermined angle.

When the water level on the front side of the door body 2 starts to fall from the state shown in Fig. 9, the door body 2 starts to fall by the lodging torque due to the torsion coil spring 31 and the lodging moment due to the dead weight of the door body 2. During the period from the maximum standing posture to the intermediate posture of the door body 2, in addition to the lodging moment due to the self-weight of the door body 2, the lodging torque due to the torsion coil spring 31 continues to act on the door body 2. Thereby, the lodging of the auxiliary door body 2 is started, and after the water level of the water 90 starts to fall, the lodging of the door body 2 is quickly started. As a result, it is possible to prevent the door body 2 from starting to fall after the water level of the water 90 is largely lowered, and the door body 2 is rapidly undulated. Further, in the case where the angle of the door body 2 in the maximum standing posture is 90 degrees, when the lodging of the door body 2 is started, the lodging moment due to the own weight of the door body 2 is not applied to the door body 2, but only acts The lodging torque generated by the coil spring 31 is twisted.

If the door body 2 falls more than the intermediate posture shown in Fig. 7, the torsion coil spring 31 starts to compress. The lodging speed due to the torsion coil spring 31 is continuously applied to the door body 2 during the period in which the door body 2 is lowered from the intermediate posture to the lodging posture shown in FIG. 5, whereby the lodging speed of the door body 2 is suppressed. Thereby, it is possible to reduce the force applied to the floor 91 or the like when the door body 2 is in the falling posture.

As described above, the undulating door 1 is provided with the door body 2 and the undulating auxiliary portion 3. In the door body 2 in the lodging posture, the movable end portion 24 of the door body 2 is located on the front side of the support end portion 23. The door body 2 is rotated by the support end portion 23 as a fulcrum, thereby changing the posture between the lodging posture and the maximum standing posture. The undulation assisting portion 3 includes a torsion coil spring 31. The torsion coil spring 31 is disposed on the lower side of the upper surface (i.e., the first main surface 21) of the door body 2 in the lodging posture. The torsion coil spring 31 includes a spiral portion 32, a first arm 33, and a second arm 34. In the spiral portion 32, the spring member is spirally wound around the central axis J2 in the width direction of the door body 2. The first arm 33 protrudes from the spiral portion 32. The front end portion of the first arm 33 is connected to the floor 91. The second arm 34 protrudes from the spiral portion 32. The front end portion of the second arm 34 is connected to the door body 2.

In the undulating door 1, in a state in which the door body 2 is in the lodging posture, the erecting moment is applied to the door body 2 by the restoring force of the torsion coil spring 31. Further, in a state where the door body 2 is in the maximum standing posture, the lodging force is applied to the door body 2 by the restoring force of the torsion coil spring 31. As described above, in the undulating door 1, by the torsion coil spring 31, it is possible to apply the erecting moment when the door body 2 starts to rise, and to apply the lodging moment when the door body 2 starts to fall. Thereby, the structure of the undulating door 1 can be simplified. As a result, it is possible to quickly start the erection when the water flows in, and to reduce the manufacturing cost of the undulating door 1 which can start to fall early when the water level drops.

As described above, the torsion coil spring 31 is disposed on the lower side of the upper surface of the door body 2 in the lodging posture. Thereby, the undulating door 1 can be made smaller than the case where the torsion coil spring 31 is disposed on the side of the door body 2 (that is, the outer side in the width direction of the door body 2). As a result, the installation area of the undulating door 1 can be reduced.

In the undulating door 1, the torsion coil springs 31 can be disposed on the center side in the width direction from both side portions of the door body 2. Therefore, the force applied to the door body 2 by the torsion coil spring 31 can be increased as compared with the case where the force is applied to the door body 2 to assist the rising or falling of the door body only by applying a force to both side portions of the movable end portion of the door body. On the other hand, the span length of the door body 2 (that is, the width of the door body 2) can be increased as compared with the case where the same degree of force is applied to the door body 2 and the force is applied only to both side portions of the movable end portion of the door body. . Further, the components in the vicinity of the movable end portion 24 of the door body 2 can be miniaturized, and the manufacturing cost of the undulating door 1 can be reduced.

As described above, the torsion coil spring 31 is disposed inside the door body 2 in the lodging posture. Thereby, it is not necessary to provide a hole or the like for accommodating the torsion coil spring 31 on the bottom surface of the recessed portion 93 (that is, the floor surface 91). Further, it is not necessary to provide a drain or the like for the above holes. Therefore, the setting and maintenance of the undulating door 1 can be facilitated.

The undulation assisting portion 3 further has another torsion coil spring 31 which is disposed at a different position from the one torsion coil spring 31 in the width direction. Thus, by providing the plurality of torsion coil springs 31, each of the torsion coil springs 31 can be downsized. Further, by arranging the plurality of torsion coil springs 31 in the width direction, the span length of the door body 2 can be further increased, and the components in the vicinity of the movable end portion 24 of the door body 2 can be further reduced in size. As a result, the manufacturing cost of the undulating door 1 can be further reduced.

In the undulating door 1, the spiral portion 32 of the torsion coil spring 31 is not fixed with respect to the floor 91 and the door body 2. Further, as the posture of the door body 2 is changed, the relative position of the spiral portion 32 with respect to the floor surface 91 and the door body 2 is changed. Thus, by making the spiral portion 32 movable, even when the central axis J2 of the spiral portion 32 is away from the rotational axis J1 of the door body 2, it is not necessary to relatively move the second connecting portion 341 and the opposite door body 2 . In addition, it is not necessary to relatively move the first connecting portion 331 with the opposite ground 91. Therefore, since it is not necessary to provide a moving mechanism such as a roller at the front end portions of the first arm 33 and the second arm 34, the structure of the undulating door 1 can be simplified. As a result, the manufacturing cost of the undulating door 1 can be further reduced.

Further, since the spiral portion 32 is not fixed to the floor 91 and the door body 2, the spiral portion 32 is not required to be disposed close to the rotation axis J1 of the door body 2. Therefore, the degree of freedom in arrangement of the spiral portion 32, the first connecting portion 331, and the second connecting portion 341 can be improved. It is also possible to easily approximate the direction of the force applied by the torsion coil spring 31 to the door body 2 and the tangential direction of the rotation of the door body 2 when the door body 2 is undulating. As a result, the rising moment and the lodging moment applied to the door body 2 by the torsion coil spring 31 can be increased.

As described above, the torsion coil spring 31 is disposed on the front side of the support end portion 23 of the door body 2. In a state where the door body 2 is in the lodging posture, the first arm 33 and the second arm 34 extend from the spiral portion 32 toward the front side. In a state where the door body 2 is in the lodging posture, the angle formed by the first arm 33 and the second arm 34 is smaller than the free angle. In a state where the door body 2 is in the maximum standing posture, the first arm 33 extends from the spiral portion 32 to the front side, and the second arm 34 extends upward from the spiral portion 32. In a state where the door body 2 is in the maximum standing posture, the angle formed by the first arm 33 and the second arm 34 is larger than the free angle. Thereby, the first arm 33 and the second arm 34 can be enlarged. In other words, the first connecting portion 331 and the second connecting portion 341 can be disposed at a position far from the rotational axis J1 of the door body 2. As a result, the rising moment and the lodging moment applied to the door body 2 from the torsion coil spring 31 can be increased.

As described above, in a state in which the door body 2 is in the lodging posture, the extension line of the front side of the second arm 34 and the second arm 34 is at the connection portion which is the first arm 33 and the floor 91, that is, the first connection portion 331 to the spiral The entire length of the portion 32 is located above the first arm 33 or at the same position as the first arm 33 in the vertical direction. Thereby, when the door body 2 is undulating, the direction of the force applied from the torsion coil spring 31 to the door body 2 and the tangential direction of the rotation of the door body 2 can be made close. As a result, the rising moment and the lodging moment applied to the door body 2 from the torsion coil spring 31 can be increased. The second arm 34 preferably coincides with a line connecting the rotation axis J1 and the second connection portion 341 when viewed from the side. Thereby, the rising moment and the lodging moment applied to the door body 2 from the torsion coil spring 31 can be further increased.

Further, as described above, the extension line of the front side of the second arm 34 and the second arm 34 is located above the first arm 33 or at the same position as the first arm 33 in the up and down direction, thereby When the door body 2 stands up from the lodging posture, as the angle of the door body 2 increases, the first connecting portion 331 and the second connecting portion 341 gradually move away from each other in the vertical direction. Therefore, the spiral portion 32 gradually moves upward and away from the first main surface 21 of the door body 2 as the angle of the door body 2 becomes larger, without being downward (that is, in the direction close to the ground 91) or close to the first The direction of the main surface 21 moves. As a result, the spiral portion 32 is prevented from coming into contact with the bottom surface of the concave portion 93 (that is, the ground surface 91) or the first main surface 21 of the door body 2 when the door body 2 is undulated, and smooth undulation of the door body 2 can be achieved.

Further, in the undulating door 1, in a state in which the door body 2 is in the lodging posture, the position of the first connecting portion 331 in the vertical direction and the second connecting portion 341 which is the connecting portion of the second arm 34 and the door body 2 The position in the up and down direction is the same. Further, the distance between the first connecting portion 331 and the central axis J2 in the front-rear direction is the same as the distance between the second connecting portion 341 and the central axis J2 in the front-rear direction. Thereby, the smooth fluctuation of the door body 2 is achieved as described above, and the second connection portion 341 can be disposed at a position far from the rotation axis J1 of the door body 2. As a result, the rising moment and the lodging moment applied to the door body 2 from the torsion coil spring 31 can be further increased.

Fig. 11 is a side view showing another example of the undulating door 1. Fig. 12 is a perspective view showing the torsion coil spring 31 shown in Fig. 11 in an enlarged manner. In the example shown in FIGS. 11 and 12, the second connecting portion 341 is located below the first connecting portion 331 in a state where the door body 2 is in the falling posture. Further, the distance between the first connecting portion 331 and the central axis J2 in the front-rear direction is the same as the distance between the second connecting portion 341 and the central axis J2 in the front-rear direction. Therefore, in a state where the door body 2 is in the lodging posture, the second arm 34 intersects the first arm 33 as viewed from the side in the width direction. Thereby, the direction of the force applied to the door body 2 by the torsion coil spring 31 and the tangential direction of the rotation of the door body 2 can be further approached when the door body 2 is undulating. As a result, the rising moment and the lodging moment applied to the door body 2 by the torsion coil spring 31 can be further increased.

In the undulating door 1 illustrated in FIGS. 11 and 12, the second connecting portion 341 may be located further rearward than the first connecting portion 331. In this case, in a state in which the door body 2 is in the lodging posture, the extension line of the front side of the second arm 34 or the second arm 34 intersects the first arm 33 as viewed from the side in the width direction. Also in this case, similarly to the above, the direction of the force applied from the torsion coil spring 31 to the door body 2 and the tangential direction of the rotation of the door body 2 can be further approached when the door body 2 is undulating. As a result, the rising moment and the lodging moment applied to the door body 2 by the torsion coil spring 31 can be further increased.

Further, in the undulating door 1 illustrated in FIGS. 11 and 12, when the door body 2 is raised from the lodging posture, the spiral portion 32 is downward (that is, in the direction close to the ground 91) or close to the first main body of the door body 2. The possibility of the direction of the face 21 moving. In this case, for example, in the first connecting portion 331 and the second connecting portion 341, it is preferable that a gap (ie, a play) is provided in the hole into which the front end portions of the first arm 33 and the second arm 34 are inserted. By moving the distal end portions of the first arm 33 and the second arm 34 in the hole, it is possible to prevent or suppress the movement of the spiral portion 32 downward or closer to the first main surface 21.

Fig. 13 is a plan view showing still another example of the undulating door 1. In the undulation door 1 illustrated in FIG. 13, the door body 2 is provided with the buoyancy part 28 located between the 1st arm 33 and the 2nd arm 34 in the width direction. Thereby, the buoyancy of the door body 2 can be increased, and therefore the door body 2 can be started to rise more quickly when the water flows in. The buoyancy unit 28 includes, for example, a buoyant body such as a foamed resin that is fixed to the lower surface of the first main surface 21 of the door body 2 . In a state where the door body 2 is in the lodging posture, the buoyancy portion 28 is not in contact with the first arm 33 and the second arm 34, but is located between the width directions of the first arm 33 and the second arm 34. In the door body 2, in the divided space 201 in which the torsion coil spring 31 is disposed, a buoyancy portion may be provided around the torsion coil spring 31 (for example, between the torsion coil spring 31 and the movable end portion 24).

Fig. 14 is a side view showing still another example of the undulating door 1. The undulating door 1 illustrated in FIG. 14 further includes a rope-like or belt-shaped erecting restricting member 35 that connects the front end portion of the first arm 33 and the front end portion of the second arm 34. The standing restraining member 35 linearly extends in a state in which the door body 2 is in the maximum standing posture. In this way, since the standing up regulating member 35 has a linear shape without slack, it is possible to prevent the door body 2 from rotating rearward beyond the maximum standing posture. The standing restraining member 35 is a member that does not substantially expand and contract in the longitudinal direction. The standing restraining member 35 is, for example, a belt-shaped member made of synthetic fiber. In a state where the door body 2 is in the falling posture, the standing restraining member 35 is folded in half at the center in the longitudinal direction, for example, and is disposed between the first arm 33 and the second arm 34.

The standing restraining member 35 may be attached to each of the torsion coil springs 31 or may be attached to a part of the torsion coil springs 31 of the plurality of torsion coil springs 31. The standing restraining member 35 can be directly attached to the front end portion of the first arm 33 and the front end portion of the second arm 34, for example. Alternatively, as shown in FIG. 15, the standing restraining member 35 may be fastened to a hole different from the hole inserted into the front end portion of the first arm 33 in the connecting portion 94, and indirectly connected via the connecting portion 94. The front end portion of the first arm 33. Alternatively, the standing restraining member 35 may be fastened to a hole different from each other in the longitudinal beam 27 for inserting the front end portion of the second arm 34, and indirectly attached to the front end portion of the second arm 34 via the longitudinal beam 27. .

16 to 19 are side views showing still another example of the undulating door 1. The undulating door 1 shown in FIG. 16 further includes upright restricting members 351 and 352. The door body 2 further includes a connecting portion 291 and a contact portion 292. In the following description, the standing restraining members 351 and 352 are referred to as a “first standing restraining member 351” and a “second standing regulating member 352, respectively”. The first standing restraining member 351 and the second standing restraining member 352 are rope-like or belt-shaped members that do not substantially expand and contract in the longitudinal direction. The first standing restraining member 351 and the second standing restraining member 352 are, for example, belt members made of synthetic fibers. The connecting portion 291 and the abutting portion 292 are disposed between the first main surface 21 and the second main surface 22 of the door body 2, and are fixed to the first main surface 21, for example. The connecting portion 291 is, for example, substantially the same member as the connecting portion 94 fixed to the floor surface 91. The abutting portion 292 is, for example, a substantially plate-shaped member.

In the undulating door 1 shown in FIG. 16, the front end portion of the first arm 33 of the torsion coil spring 31 is connected to the floor surface 91 via the connecting portion 94 in the same manner as described above. On the other hand, the second arm 34 is not fixed to the door body 2. One end portion of the first standing restraining member 351 is fixed to the front end portion of the second arm 34. The other end of the first standing restraining member 351 is fixed to the connecting portion 291. In other words, the front end portion of the second arm 34 is indirectly connected to the door body 2 via the first standing restraining member 351. One end of the second standing restraining member 352 is fixed to the front end portion of the first arm 33, and the other end portion is fixed to the front end portion of the second arm 34. In other words, the second standing restraining member 352 connects the front end portion of the first arm 33 and the front end portion of the second arm 34.

As shown in FIG. 16, in a state where the door body 2 is over the intermediate posture, the front end portion of the second arm 34 of the torsion coil spring 31 in the compressed state abuts against the abutting portion 292 from the lower side. Thereby, the torsion coil spring 31 applies a rising moment to the door body 2. The same applies to the case where the door body 2 is in the lodging posture. In a state where the door body 2 is over the intermediate posture, the first standing restraining member 351 and the second standing restraining member 352 are slack.

As shown in Fig. 17, in the state in which the door body 2 is in the intermediate posture, the torsion coil spring 31 is in a natural state, and therefore the torsion coil spring 31 does not apply the rising moment and the lodging moment to the door body 2. In a state where the door body 2 is in the intermediate posture, the first standing restraining member 351 and the second standing restraining member 352 are slack.

When the door body 2 stands up from the intermediate posture shown in FIG. 17, the second arm 34 is away from the door body 2 in the torsion coil spring 31 in the natural state. Further, since the first standing restraining member 351 and the second standing restraining member 352 are slack, the torsion coil spring 31 does not apply the rising moment and the lodging moment to the door body 2.

When the door body 2 rises more than a certain degree or more than the intermediate posture, the first standing restraining member 351 linearly extends between the door body 2 and the second arm 34 away from the natural state of the door body 2. In the undulating door 1, the torsion coil spring 31 is in a natural state from the state in which the door body 2 is in the intermediate posture to the time when the first erecting regulating member 351 is linearly extended, and the torsion coil spring 31 does not apply the erecting moment to the door body 2. And the lodging torque.

After the first standing restraining member 351 extends linearly, as the door body 2 stands up, as shown in FIG. 18, the second arm 34 of the torsion coil spring 31 is pulled by the door body 2 via the first standing restraining member 351. While away from the first arm 33, the torsion coil spring 31 is in a stretched state. Thereby, the torsion coil spring 31 applies a lodging moment to the door body 2. In the state shown in Fig. 18, the second standing restraining member 352 is slack.

As shown in FIG. 19, when the door body 2 is in the maximum standing posture, the first standing up regulating member 351 and the second standing up regulating member 352 extend linearly. In this way, since the first standing up regulating member 351 and the second standing up regulating member 352 are linear without being slack, it is possible to prevent the door body 2 from rotating rearward beyond the maximum standing posture. Further, in a state where the door body 2 is in the maximum standing posture, the torsion coil spring 31 is in a stretched state as described above. Thereby, the torsion coil spring 31 applies a lodging moment to the door body 2.

As described above, in the undulating door 1 shown in FIGS. 16 to 19, similarly to the above, by the torsion coil spring 31, it is possible to realize the erecting moment when the door body 2 starts to stand up with a simple structure, and The lodging moment is applied when the door body 2 starts to fall.

Next, the undulating door 1a of the second embodiment of the present invention will be described. Fig. 20 is a side view showing the undulating door 1a. Fig. 21 is a plan view showing the undulating door 1a. Fig. 22 is a front elevational view showing the undulating door 1a viewed from the front. The undulating door 1a is provided with a weight mechanism 6 in addition to the respective structures of the undulating door 1 shown in FIGS. 1 to 3. The structure other than the weight mechanism 6 of the undulating door 1a is substantially the same as that of the above-described undulating door 1. In the following description, the configuration other than the weight mechanism 6 of the undulating door 1a is denoted by the same reference numerals as the structure corresponding to the undulating door 1.

The weight mechanism 6 is provided with a weight 61 and a rope 62 as a rope-like or belt-shaped connecting member. In the example shown in Figs. 20 to 22, two sets of weights 61 and ropes 62 are provided in the weight mechanism 6. The two weights 61 are disposed on the rear side of the support end portion 23 of the door body 2 on both sides in the width direction of the door body 2. The weight 61 is disposed, for example, inside the door stop portion 11. One end of the rope 62 is connected to the weight 61.

The rope 62 extends forward through the two fixed pulleys 63 that are juxtaposed in the front-rear direction. The fixed pulley 63 is fixed to, for example, the door stop portion 11. The other end of the rope 62 is connected below the fixed pulley 63 on the front side and the movable end 24 of the door body 2. For example, the other end portion of the cord 62 is connected to the protruding portion 241 that protrudes outward in the width direction in the movable end portion 24. The weight 61 is suspended by the rope 62 and separated upward from the ground 91. In the case where the door body 2 is in the lodging posture, the absolute value of the lodging moment due to the own weight of the door body 2 is higher than the rising moment and the counterweight 61 generated by the torsion coil spring 31 of the undulating auxiliary portion 3 in the compressed state. The absolute value of the total of the rising moments generated by the weight is large.

Next, a case where the door body 2 is raised in the undulating door 1a will be described with reference to Figs. 23 to 27 . As shown in Fig. 23, when the water 90 flows into the undulating door 1a, the erecting moment is applied to the door body 2 by buoyancy or the like generated in the door body 2 by the water 90, and the door body 2 starts to stand up. At this time, in addition to the erecting moment generated by the water 90, the door body 2 acts on the lodging torque due to the self-weight of the door body 2, the erecting moment due to the restoring force of the torsion coil spring 31, and The rising moment due to the weight 61 (i.e., the rising moment generated by the gravity acting on the counterweight 61).

The standing moment generated by the torsion coil spring 31 and the rising moment due to the weight 61 are in the posture of the door body 2 from the lodging posture shown in FIG. 23 to the posture shown in FIG. The intermediate posture continues to act on the door body 2. Thereby, the auxiliary door body 2 stands up, and the rising speed of the door body 2 increases. In a state where the door body 2 is between the falling posture and the intermediate posture, as the angle of the door body 2 becomes larger, the absolute value of the rising moment due to the torsion coil spring 31 and the standing due to the weight 61 The absolute value of the starting torque is gradually reduced.

As described above, in a state where the door body 2 is in the intermediate posture, the torsion coil spring 31 is in a free state in which it is not compressed and stretched. Further, in the present embodiment, when the door body 2 is in the intermediate posture, the door body 2 and the rope 62 extending from the fixed pulley 63 on the front side of the movable end portion 24 of the door body 2 are positioned in a straight line as viewed from the side. In other words, the tangential line extending from the lower portion of the fixed pulley 63 on the front side of the rotation axis J1 of the door body 2 and the door body 2 and the above-mentioned rope 62 are superposed on the side view. Thereby, the moment applied by the weight 61 to the door body 2 actually becomes zero. The position of the weight 61 shown in Fig. 25 is the lowest point of the weight 61. Even at the lowest point, the weight 61 is suspended by the rope 62 and separated upward from the floor 91.

When the door body 2 stands up beyond the second posture, the torsion coil spring 31 is in a stretched state, and the lodging moment generated by the torsion coil spring 31 acts on the door body 2. Further, the lodging torque generated by the weight 61 (i.e., the lodging torque generated by the gravity acting on the weight 61) also acts on the door body 2. The lodging torque generated by the torsion coil spring 31 and the lodging moment due to the weight 61 are in the posture of the door body 2 from the intermediate posture shown in Fig. 25 through the posture shown in Fig. 26 to the maximum shown in Fig. 27. The door body 2 is continuously applied until the posture is raised. Thereby, the rising speed of the door body 2 can be suppressed. In a state where the door body 2 is between the intermediate posture and the maximum standing posture, as the angle of the door body 2 becomes larger, the absolute value of the lodging moment due to the torsion coil spring 31, and the counterweight 61 are generated. The absolute value of the lodging torque gradually increases.

If the water level on the front side of the door body 2 starts to decrease, the door body is caused by the lodging moment due to the torsion coil spring 31, the lodging moment due to the weight 61, and the lodging moment due to the weight of the door body 2. 2 starts to fall. During the period from the maximum standing posture to the intermediate posture shown in FIG. 25, in addition to the lodging moment due to the self-weight of the door body 2, there is a lodging torque due to the torsion coil spring 31, and The lodging torque generated by the weight 61 also continues to act on the door body 2. Thereby, the lodging of the auxiliary door body 2 is started, and after the water level of the water 90 starts to fall, the lodging of the door body 2 is quickly started.

During the fall of the door body 2 from the intermediate posture to the lodging posture shown in FIG. 23, the standing moment generated by the torsion coil spring 31 and the rising moment due to the weight 61 are continuously applied to the door body 2. Thereby, the lodging speed of the door body 2 can be suppressed.

As described above, the undulating door 1a further includes a weight 61 and a rope 62 as a connecting member. The rope 62 connects the weight 61 and the movable end portion 24 of the door body 2, and suspends the weight 61. In the undulating door 1a, the erecting moment is applied to the door body 2 by the restoring force of the torsion coil spring 31 and the weight 61 in a state where the door body 2 is in the falling posture. Further, in a state where the door body 2 is in the maximum standing posture, the lodging force is applied to the door body 2 by the restoring force of the torsion coil spring 31 and the weight 61.

Thereby, the torsion coil spring 31 can be miniaturized. Further, the weight 61 can be made lighter than the case where the weighting mechanism 6 is provided without providing the undulating auxiliary portion 3. Thereby, the span length of the door body 2 (that is, the width of the door body 2) can be increased. Moreover, the components in the vicinity of the movable end portion 24 of the door body 2 can be miniaturized, and the manufacturing cost of the undulating door 1a can be reduced.

Next, the undulation door 1b of the third embodiment of the present invention will be described. Figure 28 is a side view of the undulating door 1b. In the undulating door 1b, the rotation axis J1 of the door body 2 is located on the lower side of the second main face 22 of the door body 2 in the support end portion 23 of the door body 2. Further, the floor 91 extends downward slightly forward of the rotation axis J1. In the following description, a portion of the floor surface 91 that extends downward is referred to as a vertical floor surface 95. A connecting portion 94 is provided on the vertical floor 95 (i.e., on the rear side of the vertical floor 95). The support end portion 23 of the door body 2 extends further toward the rear side than the vertical floor surface 95. In the undulating door 1b, the door body 2 is rotated by the rotation axis J1 of the support end portion 23 as a fulcrum, thereby changing the posture between the lodging posture indicated by the solid line and the maximum erect posture indicated by the chain double-dashed line. The gap between the raised door body 2 and the floor surface 91 is closed by a sealing member 96 (for example, a thin plate-shaped watertight rubber) that connects the door body 2 and the vertical floor 95 on the front side of the rotation axis J1.

The undulating auxiliary portion 3b of the undulating door 1b includes a torsion coil spring 31b. The undulation assisting portion 3b includes, for example, a plurality of torsion coil springs 31b arranged in the width direction of the door body 2. Each of the torsion coil springs 31b is disposed on the rear side of the rotation axis J1 which is the fulcrum of the door body 2. Each of the torsion coil springs 31b is disposed on the lower side of the first main surface 21 of the door body 2 in the lodging posture. The plurality of torsion coil springs 31b have the same structure. The number of the torsion coil springs 31b included in the undulation assisting portion 3b can be appropriately changed. The number of the torsion coil springs 31b may be one, for example, two or more.

Similarly to the torsion coil spring 31 shown in FIG. 4, the torsion coil spring 31b includes a spiral portion 32, a first arm 33, and a second arm 34. The spiral portion 32 is a substantially cylindrical portion centering on the central axis J2 in the width direction of the door body 2. In the spiral portion 32, the spring members are spirally wound around a central axis J2 which is substantially parallel in the width direction. The spiral portion 32 is not fixed with respect to the floor 91 and the door body 2. In a state where the door body 2 is in the falling posture, the spiral portion 32 is separated rearward from the vertical floor surface 95 of the floor surface 91.

In the torsion coil spring 31b, the first arm 33 and the second arm 34 protrude from the spiral portion 32, respectively. In a state where the door body 2 is in the falling posture, the first arm 33 extends downward from the spiral portion 32. The front end portion of the first arm 33 is inserted into a hole of the connecting portion 94 fixed to the vertical floor surface 95 of the floor surface 91. Thereby, the front end portion of the first arm 33 is connected to the floor surface 91 via the connection portion 94. In a state where the door body 2 is in the lodging posture, the second arm 34 extends from the spiral portion 32 toward the rear side. The front end portion of the second arm 34 is inserted into a hole provided in the side member 27 (refer to FIG. 4) of the door body 2. Thereby, the front end portion of the second arm 34 and the door body 2 are connected.

In a state where the door body 2 is in the lodging posture, the angle formed by the first arm 33 and the second arm 34 is larger than the free angle. In other words, the torsion coil spring 31b is stretched more than the free state. Therefore, in a state where the door body 2 is in the lodging posture, the standing torque is applied to the door body 2 by the restoring force of the torsion coil spring 31b. The rising moment generated by the torsion coil spring 31b continues to act on the door body 2 until the posture of the door body 2 starts from the lodging posture to the intermediate posture.

Further, the angle formed by the first arm 33 and the second arm 34 is an angle when the first arm 33 and the second arm 34 are viewed from the side in the direction in which the central axis J2 of the spiral portion 32 faces. In addition, the angle formed by the first arm 33 and the second arm 34 is zero in the case where the first arm 33 and the second arm 34 are parallel when viewed from the side, and the first arm 33 and the second arm 34 are on the side. The side is closer and smaller.

As shown by a chain double-dashed line in FIG. 28, the first arm 33 and the second arm 34 extend downward from the spiral portion 32 in a state where the door body 2 is in the maximum standing posture. In a state where the door body 2 is in the maximum standing posture, the angle formed by the first arm 33 and the second arm 34 is smaller than the free angle. In other words, the torsion coil spring 31b is compressed more than the free state. Therefore, in a state where the door body 2 is in the maximum standing posture, the lodging force is applied to the door body 2 by the restoring force of the torsion coil spring 31b. The lodging torque generated by the torsion coil spring 31b continues to act on the door body 2 until the posture of the door body 2 starts from the intermediate posture to the maximum standing posture.

In the undulating door 1b, similarly to the undulating door 1 shown in Fig. 1, in the state in which the door body 2 is in the falling posture, the erecting moment is applied to the door body 2 by the restoring force of the torsion coil spring 31b. Further, in a state where the door body 2 is in the maximum standing posture, the lodging force is applied to the door body 2 by the restoring force of the torsion coil spring 31b. Thus, in the undulating door 1b, by twisting the coil spring 31b, it is possible to apply the erecting moment when the door body 2 starts to rise, and to apply the lodging moment when the door body 2 starts to fall. Thereby, the structure of the undulating door 1b can be simplified. As a result, it is possible to quickly start the erection when the water flows in, and to reduce the manufacturing cost of the undulating door 1b which can start to fall early when the water level drops.

Further, the torsion coil spring 31b is disposed on the lower side of the upper surface (i.e., the first main surface 21) of the door body 2 in the lodging posture. Thereby, the undulating door 1b can be made smaller than the case where the torsion coil spring 31b is disposed on the side of the door body 2 (that is, the outer side in the width direction of the door body 2). As a result, the installation area of the undulating door 1b can be reduced.

In the undulating door 1b, the torsion coil spring 31b is disposed on the rear side of the fulcrum of the rotation of the door body 2 (that is, the rotation axis J1 of the support end portion 23). In a state where the door body 2 is in the falling posture, the first arm 33 extends downward from the spiral portion 32, and the second arm 34 extends from the spiral portion 32 toward the rear side. In a state where the door body 2 is in the lodging posture, the angle formed by the first arm 33 and the second arm 34 is larger than the free angle. The first arm 33 and the second arm 34 extend downward from the spiral portion 32 in a state where the door body 2 is in the maximum standing posture. In a state where the door body 2 is in the maximum standing posture, the angle formed by the first arm 33 and the second arm 34 is smaller than the free angle.

Thereby, the undulating door 1b can be provided even on the floor 91 which has the vertical floor 95 extended downwards in the longitudinal direction of the door body 2. Further, since the torsion coil spring 31b is not provided before the rotation axis J1, the door body 2 can be provided with a large buoyancy portion. As a result, the rising speed of the door body 2 can be increased.

In the undulating door 1b, similarly to the undulating door 1 shown in Fig. 1, the spiral portion 32 is not fixed to the floor 91 and the door body 2, and the spiral portion 32 is fixed with respect to the ground 91 as the posture of the door body 2 is changed. The relative position of the door body 2 is changed. Thereby, the structure of the undulating door 1b can be simplified. As a result, the manufacturing cost of the undulating door 1b can be further reduced.

In the undulating door 1b, similarly to the undulating door 1a shown in Fig. 20, a weight mechanism 6 may be provided in addition to the undulating auxiliary portion 3b. Thereby, the torsion coil spring 31b can be reduced in size. Further, the weight 61 can be made lighter than the case where the weighting mechanism 6 is provided without providing the undulating auxiliary portion 3b. Thereby, the span length of the door body 2 (that is, the width of the door body 2) can be increased. Further, the components in the vicinity of the movable end portion 24 of the door body 2 can be miniaturized, and the manufacturing cost of the undulating door 1b can be reduced.

Various changes can be made in the above-described undulations 1, 1a, 1b.

For example, in the undulating door 1, the connection structure of the first arm 33 and the floor 91 in the first connecting portion 331 can be variously changed. Further, the connection structure of the second arm 34 and the door body 2 in the second connecting portion 341 can be variously changed. For example, the front end portion of the second arm 34 and the door body 2 may be indirectly connected via a rope-like or strip-shaped member that does not substantially expand and contract. Thereby, the torsion coil spring 31 can be downsized, and the second connection portion 341 can be disposed at a position that is largely away from the rotation axis J1. The same applies to the undulating doors 1a and 1b.

In the undulating doors 1, 1a, the spiral portion 32 of the torsion coil spring 31 may be fixed to the floor 91. In this case, a roller or the like that is in contact with the door body 2 and movable on the door body 2 is provided at the front end portion of the second arm 34, and the second arm 34 is connected to the door body 2 via the roller or the like. Further, in the undulating doors 1, 1a, the spiral portion 32 of the torsion coil spring 31 may be fixed to the door body 2. In this case, a roller or the like that is in contact with the floor surface 91 and movable on the floor surface 91 is provided at the front end portion of the first arm 33, and the first arm 33 is connected to the floor surface 91 via the roller or the like. The same applies to the undulating door 1b.

In the undulating doors 1 and 1a, a hole or the like may be provided on the bottom surface of the concave portion 93, and the lower portion of the torsion coil spring 31 may be housed in the hole. Further, the recessed portion 93 may not be provided on the floor surface 91, and the door body 2 in the lodging posture may be provided on a flat floor surface 91 having substantially the same height as the surroundings. In the undulating door 1b, the door body 2 in the lodging posture can also be placed on a flat floor 91 having almost the same height as the surroundings.

The structure of the undulating doors 1, 1a, 1b can also be applied to undulating doors other than undulating doors (so-called floating undulating doors) in which the door body 2 is automatically raised by the water pressure. For example, the above-described structure of the undulating doors 1, 1a, 1b can also be applied to a undulating door that manually raises the door body 2, or a undulating door that raises the door body 2 by a hydraulic cylinder, an electric jack, or the like.

The configurations in the above-described embodiments and the modifications may be combined as appropriate without contradicting each other.

The invention has been described in detail, but the above description is by way of example only and not limitation. Therefore, various modifications may be made without departing from the scope of the invention.

1, 1a, 1b‧‧‧ undulating

11‧‧‧door stop

111‧‧‧ Door contact surface

2‧‧‧

201‧‧‧ Space

21‧‧‧ (first part of the door)

22‧‧‧ (second part of the door)

23‧‧‧Support end

24‧‧‧ movable end

241‧‧‧Protruding

27‧‧‧stringer

28‧‧‧ buoyancy

291‧‧‧Connecting Department

292‧‧‧Apartment

3, 3b‧‧‧ undulating assistant

31, 31b‧‧‧ torsion coil spring

32‧‧‧Spiral Department

33‧‧‧First arm

331‧‧‧ first connection

34‧‧‧second arm

341‧‧‧Second connection

35, 351, 352 ‧ ‧ set up restrictions

6‧‧‧weight mechanism

61‧‧‧weight

62‧‧‧ rope

63‧‧‧ fixed pulley

81‧‧‧dotted line

82‧‧‧solid line

83‧‧‧ Thick solid line

90‧‧‧ water

91‧‧‧ Ground

92‧‧‧ openings

93‧‧‧ recess

94‧‧‧Connecting Department

95‧‧‧ vertical ground

96‧‧‧ Sealing parts

J1‧‧‧ rotating shaft

J2‧‧‧ central axis

Fig. 1 is a side view of the undulation door of the first embodiment. Figure 2 is a top view of the undulating door. Figure 3 is a front view of the undulating door. Figure 4 is a perspective view of a torsion coil spring. Figure 5 is a side view of the undulating door. Figure 6 is a side view of the undulating door. Figure 7 is a side view of the undulating door. Figure 8 is a side view of the undulating door. Figure 9 is a side view of the undulating door. Fig. 10 is a view showing the relationship between the posture of the door body and the moment acting on the door body. Fig. 11 is a side view showing another example of the undulating door. Figure 12 is a perspective view of a torsion coil spring. Figure 13 is a side view showing another example of the undulating door. Fig. 14 is a side view showing another example of the undulating door. Fig. 15 is a side view showing another example of the undulating door. Fig. 16 is a side view showing another example of the undulating door. Figure 17 is a side view showing another example of the undulating door. Fig. 18 is a side view showing another example of the undulating door. Fig. 19 is a side view showing another example of the undulating door. Figure 20 is a side view of the undulation door of the second embodiment. Figure 21 is a top plan view of the undulating door. Figure 22 is a front elevational view of the undulating door. Figure 23 is a side view of the undulating door. Figure 24 is a side view of the undulating door. Figure 25 is a side view of the undulating door. Figure 26 is a side view of the undulating door. Figure 27 is a side view of the undulating door. Figure 28 is a side view of the undulation door of the third embodiment.

Claims (14)

An undulating door is disposed at an opening portion and is erected to cover the opening portion when water flows in from the opening portion, the undulating door comprising: a door body in a lodging position, a movable end portion being located at a ratio The side on which the support end further flows in, that is, a front side, is rotated between the lodging position and a maximum standing posture by rotating the support end as a point; and assisting together a torsion coil spring disposed on a lower side of the upper surface of the door body in the lodging posture, the torsion coil spring comprising: a spiral portion for causing a spring member to face the width direction of the door body The central axis is centered and spirally wound; a first arm protruding from the spiral portion and having a front end portion connected to a ground; and a second arm protruding from the spiral portion and having a front end portion The door body is connected, wherein the door body is in the state of the lodging posture, and the erecting moment is applied to the door body by the restoring force of the torsion coil spring, wherein the door body is in the state of the maximum erect posture, and the door body is used Twist The restoring force of the coil spring torque applied to the door lodging. The undulating door according to claim 1, wherein the torsion coil spring is disposed closer to the front side than the supporting end portion, wherein the first arm and the first arm are in a state of the lodging posture a second arm extending from the spiral portion toward the front side, the first arm and the second arm being at an angle smaller than a free angle, wherein the first arm is in the state of the maximum standing posture, the first arm is from the spiral The portion extends toward the front side, and the second arm extends upward from the spiral portion, and the angle between the first arm and the second arm is greater than a free angle. The undulating door according to claim 2, wherein, in a state in which the door body is in the lodging posture, an extension line of the second arm and the second arm toward the front side is from the first arm A connecting portion with the ground is located over the entire length of the range from the first connecting portion to the spiral portion, and is located above the first arm or at the same position as the first arm in the vertical direction. The undulation door of claim 3, wherein the door body includes a buoyancy portion between the first arm and the second arm in the width direction. The undulating door according to claim 3, wherein the undulating door further comprises a rope-like or strip-shaped standing restraining member connecting the front end portion of the first arm and the front end portion of the second arm Where the door body is in the state of the maximum standing posture, the standing restraining member extends linearly. The undulating door according to claim 2, wherein the extension of the second arm or the second arm toward the front side is on a side facing the width direction in a state in which the door body is in the lodging posture Observed to cross the first arm. The undulating door according to claim 6, wherein the door body includes a buoyancy portion between the first arm and the second arm in the width direction. The undulating door according to claim 6, wherein the undulating door further comprises a rope-like or strip-shaped standing limit connecting the front end portion of the first arm and the front end portion of the second arm a member in which the standing restraining member extends linearly in a state in which the door body is in the maximum standing posture. The undulation door of claim 2, wherein the door body includes a buoyancy portion between the first arm and the second arm in the width direction. The undulating door according to claim 2, wherein the undulating door further comprises a rope or strip-shaped standing limit connecting the front end portion of the first arm and the front end portion of the second arm a member in which the standing restraining member extends linearly in a state in which the door body is in the maximum standing posture. The undulating door according to claim 1, wherein the torsion coil spring is disposed on a rear side of the fulcrum, wherein the first arm is in the state of the lodging posture, the first arm is from the spiral portion Extending downwardly, the second arm extends from the spiral portion toward the rear side, and the angle between the first arm and the second arm is greater than a free angle, wherein the door body is in the state of the maximum standing posture, The first arm and the second arm extend downward from the spiral portion, and the angle between the first arm and the second arm is smaller than a free angle. The undulation door according to any one of claims 1 to 11, wherein the spiral portion is non-fixed with respect to the ground and the door body, and the spiral portion is opposite to the door body as the posture of the door body is changed. The relative position of the ground and the door is changed. The undulating door of claim 12, wherein the undulating door further comprises: a weight; and a connecting member connecting the weight with the movable end of the door and suspending the a counterweight, wherein the door body is in the state of the lodging posture, and the erecting moment is applied to the door body by the weight, wherein the door body is in the state of the maximum erect posture, and the weight is The door body applies a lodging moment. The undulating door according to any one of claims 1 to 11, wherein the undulating door further comprises: a weight; and a connecting member connecting the weight and the movable end of the door And suspending the weight, wherein the door body is in the state of the lodging posture, and the erecting moment is applied to the door body by the weight, wherein the door body is in the state of the maximum erect posture, The weight applies a lodging moment to the door.