WO2018185984A1 - 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 gate that stands up and shields the opening when water flows from the opening.

Conventionally, in order to prevent water from entering a building or the like in the event of a flood, a waterproof door that undulates via a hinge is provided at the entrance of the building or the like. Japanese Laid-Open Patent Publication No. 10-238240 (Reference 1) proposes a standing assist device that applies a standing moment to a waterproof door by a torsion coil spring fixed to the floor surface in a lifting gate that is manually raised by a worker. . One arm of the torsion coil spring in the natural state extends horizontally along the floor surface and is fixed to the floor surface, and the other arm extends upward. And the roller is provided in the front-end | tip part of the said other arm, and the said roller is contacting the lower surface of a waterproof door. When the waterproof door falls, the torsion coil spring is compressed, and an upright moment is applied from the torsion coil spring to the waterproof door. In addition, when the position of the waterproof door is changed, the contact point between the tip of the other arm and the waterproof door moves in the longitudinal direction of the waterproof door. The movement is smooth.

Similarly, Japanese Laid-Open Patent Publication No. 2006-83595 (Reference 2) proposes a standing assistance device that gives a standing moment to a waterproof door by a torsion coil spring fixed to a floor surface in a raising gate that is manually raised by an operator. Has been. In the standing assist device, the torsion coil spring is not used until the waterproof door in the lying posture stands at a predetermined angle, and a standing moment is applied to the waterproof door by the gas damper. When the waterproof door stands up from a predetermined angle, the application of the rising moment by the gas damper is stopped, and the rising moment is applied to the waterproof door by the torsion coil spring.

Japanese Patent Application Laid-Open No. 2007-170112 (Reference 3) proposes a technique for applying a rising moment to a waterproof door by a torsion coil spring fixed to a floor surface in a raising and lowering gate that is raised and lowered by an electric motor. The tip of one arm of the torsion coil spring is fixed to the floor, and the tip of the other arm is fixed to the door body.

On the other hand, in floating undulation gates provided at openings such as seawalls, when the water is increased by a tsunami or the like, the door rises due to the pressure of water flowing from the openings and shields the openings. By the way, since the water pressure acting on the undulation gate is relatively small at the beginning of the inflow of water, the raising operation of the undulation gate is relatively gentle. In addition, when the water level drops after the water increase, the raising / lowering operation of the hoisting gate is not started until the water level drops to some extent, and then it may fall suddenly.

Therefore, in the floating flap gate of Japanese Patent Application Laid-Open No. 2015-180806 (Reference 4), in order to promote the standing of the door body in the lying posture, and to promote the start of the lodging of the door body in the standing posture when the water level is lowered, A technique for attaching a counterweight to a door body has been proposed.

By the way, some undulation gates, such as those on the seawall, allow vehicles to pass over the door body in a lying posture when the water is not flooded. In such an undulating gate, it is necessary to increase the strength of the door body, which increases the weight of the door body. Therefore, when the structure of Document 4 is applied, the weight of the counterweight increases. 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 a member cross section at the front end portion of the door body.

On the other hand, in the standing assistance devices of Documents 1 to 3, a standing moment is always applied to the waterproof door regardless of the posture of the waterproof door. For this reason, it is necessary to apply a large force to the waterproof door when the waterproof door in the standing posture is set to the lying posture. Therefore, it is difficult to apply the structures of Documents 1 to 3 to the above-described floating-type flap gate in which it is preferable that the fall start of the door body in the standing posture is promoted when the water level is lowered.

The present invention is directed to a undulation gate that is provided in the opening and stands up when the water flows in from the opening to shield the opening, and aims to simplify the structure of the undulation gate.

The undulating gate according to the present invention is configured such that the movable end portion is positioned on the front side where water flows in from the support end portion in the lying posture, and rotates around the supporting end portion as a fulcrum. And a maximum assisting posture, and a raising / lowering assisting portion including a torsion coil spring disposed below the upper surface of the door in the lying posture. The torsion coil spring includes a coil portion in which a spring material is spirally wound around a central axis facing the width direction of the door body, and a first arm that protrudes from the coil portion and has a tip portion connected to the floor surface And a second arm protruding from the coil portion and having a tip portion connected to the door body. In the state in which the door body is in the lying posture, a standing moment is applied to the door body by the restoring force of the torsion coil spring. In the state where the door body is in the maximum standing posture, a lodging moment is applied to the door body by the restoring force of the torsion coil spring. Thereby, the structure of the relief gate can be simplified.

In one preferred embodiment of the present invention, the torsion coil spring is disposed on the front side of the support end. In a state where the door body is in the lying posture, the first arm and the second arm extend from the coil portion to the front side, and an angle formed by the first arm and the second arm is a free angle. Smaller than. In the state where the door body is in the maximum standing posture, the first arm extends from the coil portion to the front side, the second arm extends upward from the coil portion, and the first arm and the The angle formed with the second arm is larger than the free angle.

More preferably, in the state in which the door body is in the lying posture, the second arm and the extension line to the front side of the second arm are a connection portion between the first arm and the floor surface. It is located above the first arm or at the same vertical position as the first arm over the entire length from the connecting portion to the coil portion.

Alternatively, in a state where the door body is in the lying posture, the extension line to the front side of the second arm or the second arm intersects the first arm in a side view facing the width direction.

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

In another preferred embodiment of the present invention, the hoisting gate further includes a string-like or belt-like standing restriction member that connects the tip portion of the first arm and the tip portion of the second arm. In the state where the door body is in the maximum standing posture, the standing restriction member extends linearly.

In another preferred embodiment of the present invention, the torsion coil spring is disposed behind the fulcrum. In the state where the door body is in the lying posture, the first arm extends downward from the coil portion, the second arm extends from the coil portion to the rear side, and the first arm and the The angle formed with the second arm is larger than the free angle. In a state where the door body is in the maximum standing posture, the first arm and the second arm extend downward from the coil portion, and an angle formed by the first arm and the second arm is a free angle. Smaller than.

In another preferred embodiment of the present invention, the coil portion is not fixed to the floor surface and the door body, and the floor surface and the door body are changed as the posture of the door body changes. The relative position of the coil part is changed.

In another preferred embodiment of the present invention, the undulating gate further includes a counterweight, and a connecting member that connects the counterweight and the movable end of the door body to suspend the counterweight. In the state where the door body is in the lying posture, a standing moment is applied to the door body by the counterweight. In the state where the door body is in the maximum standing posture, a fall moment is applied to the door body by the counterweight.

The above object and other objects, features, aspects, and advantages will become apparent from the following detailed description of the present invention with reference to the accompanying drawings.

It is a side view of the relief gate which concerns on 1st Embodiment. It is a top view of the undulation gate. It is a front view of the undulation gate. It is a perspective view of a torsion coil spring. It is a side view of an undulation gate. It is a side view of an undulation gate. It is a side view of an undulation gate. It is a side view of an undulation gate. It is a side view of an undulation gate. It is a figure which shows the relationship between the attitude | position of a door body, and the moment which acts on a door body. It is a side view which shows the other example of the undulation gate. It is a perspective view of a torsion coil spring. It is a side view which shows the other example of the undulation gate. It is a side view which shows the other example of the undulation gate. It is a side view which shows the other example of the undulation gate. It is a side view which shows the other example of the undulation gate. It is a side view which shows the other example of the undulation gate. It is a side view which shows the other example of the undulation gate. It is a side view which shows the other example of the undulation gate. It is a side view of the relief gate which concerns on 2nd Embodiment. It is a top view of the undulation gate. It is a front view of the undulation gate. It is a side view of an undulation gate. It is a side view of an undulation gate. It is a side view of an undulation gate. It is a side view of an undulation gate. It is a side view of an undulation gate. It is a side view of the relief gate which concerns on 3rd Embodiment.

FIG. 1 is a side view showing an undulating gate 1 according to a first embodiment of the present invention. FIG. 2 is a plan view showing the undulating gate 1. FIG. 3 is a front view of the undulating gate 1 as seen from the front. The undulation gate 1 is a floating type undulation gate. The undulation gate 1 is provided on the floor surface 91 (for example, road surface) in the opening 92 of the bank, for example. When the water flows in from the opening 92 due to increased water, the undulation gate 1 stands up by the pressure of the flowing water and shields the opening 92 so that the water flows into the living space from the opening 92. Suppress. In the example illustrated in FIG. 1, the floor surface 91 extends substantially horizontally (that is, substantially perpendicular to the direction of gravity).

In the following description, the side where water flows in at the undulation gate 1 when water is increased (that is, the upstream side in the water inflow direction, for example, the water side of the sea, river, etc. from the undulation gate 1) is “front side”. The downstream side of the undulating gate 1 in the water inflow direction (for example, the land side of the undulating gate 1) is called the “rear side”. That is, the left-right direction in FIGS. 1 and 2 is the “front-rear direction”, and the left side and right side in FIGS. 1 and 2 are the “front side” and the “rear side”, respectively. Also, the vertical direction in FIG. 2 and the horizontal direction in FIG. 3 are referred to as “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-down direction. The vertical direction in FIGS. 1 and 3 is substantially parallel to the direction of gravity.

The undulation gate 1 includes a door body 2, a pair of door stop portions 11, and a undulation assisting portion 3. The door body 2 shown in FIGS. 1 to 3 is a substantially rectangular parallelepiped member extending in the front-rear direction and the width direction. 1 to 3 show a state in which the door body 2 is lying on the floor surface 91. In the following description, the posture of the door body 2 indicated by a solid line in FIG. The door body 2 in the lying posture is accommodated in a recess 93 provided on the floor surface 91. The recess 93 is slightly larger than the door body 2 in the lying posture in plan view.

The position in the vertical direction of the upper surface (hereinafter referred to as “first main surface 21”) of the door body 2 in the lying posture is substantially the same as the vertical position of the floor surface 91 around the recess 93. For example, a vehicle or the like can pass through the first main surface 21 of the door body 2 in the lying posture. The lower surface (hereinafter referred to as “second main surface 22”) of the door body 2 in the lying posture is in contact with or close to the bottom surface of the recess 93 of the floor surface 91. In addition, when the board | plate material (namely, board | plate material which spreads in the front-back direction and the width direction) is not provided in the lower end of the door body 2 of a lying posture, the 2nd main surface 22 of the door body 2 is below from the 1st main surface 21. The lower end surface of a girder member or the like that extends. In the example shown in FIG. 1, the bottom surface of the concave portion 93 that is a part of the floor surface 91 also extends substantially horizontally.

The rear end portion 23 of the door body 2 in the lying posture is rotatably attached to the floor surface 91 at the rear end portion of the recess 93 and is supported by the floor surface 91. In the following description, the rear end portion 23 of the door body 2 in the lying posture is referred to as a “support end portion 23”. Further, the front end portion 24 of the door body 2 in the lying posture is referred to as a “movable end portion 24”. That is, in the door body 2 in the lying posture, the movable end portion 24 is positioned in front of the support end portion 23. In the following description, the direction perpendicular to the width direction and connecting the support end 23 and the movable end 24 of the door body 2 is referred to as the “longitudinal direction” of the door body 2. In the door body 2 in the lying posture, the longitudinal direction of the door body 2 is the same direction as the front-rear direction.

The door body 2 is pivoted clockwise in FIG. 1 about a rotation axis J1 extending substantially parallel to the width direction at the support end 23, whereby the movable end 24 is separated upward from the floor surface 91. Then stand up. The rotation axis J1 is located in the vicinity of the rear end edge of the first main surface 21 of the door body 2. In the example shown in FIG. 1, as shown by a two-dot chain line, the door body 2 can stand up until the angle formed with the floor surface 91 becomes about 75 degrees. In the following description, the posture of the door body 2 indicated by a two-dot chain line in FIG. 1 is referred to as “maximum standing posture”. In the hoisting gate 1, the door body 2 changes its posture between the lying posture and the maximum standing posture by rotating around the support end 23. The angle formed between the door body 2 in the maximum standing posture and the floor surface 91 may be set as appropriate within a range of greater than 0 degrees and 90 degrees or less.

The pair of door stoppers 11 are arranged on both sides of the door body 2 in the width direction. In FIG. 1, the illustration of the door contact portion 11 on the nearer side than the door body 2 is omitted. As shown in FIG. 3, the space between the pair of door stoppers 11 is the opening 92 described above. The door stop 11 is, for example, a substantially plate-like structure. For example, a seawall is provided on the outside in the width direction of the pair of door stop portions 11. The pair of door stop portions 11 are fixed to the seawall.

The side surface of the door body 2 is in contact with the door body contact surface 111 which is the side surface on the inner side in the width direction of the door stopper 11. Specifically, a seal member (not shown) (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 door stop 11 via the seal member. By the said sealing member, between the door body 2 and the door stop part 11 is sealed watertight. In the undulating gate 1, the side surface of the door body 2 is in contact with the door body contact surface 111 regardless of the posture of the door body 2, and the watertightness between the door body 2 and the door stopper 11 is maintained.

The door body 2 includes a plurality of stringers 27 extending substantially parallel to the longitudinal direction between the first main surface 21 and the second main surface 22. Each stringer 27 extends over substantially the entire length between the support end 23 and the movable end 24 of the door body 2. The plurality of stringers 27 are arranged in the width direction while being separated from each other. In the example shown in FIGS. 2 and 3, six stringers 27 are provided on the door body 2. The space below the first main surface 21 of the door body 2 in the lying posture is divided into seven spaces 201 arranged in the width direction by the six vertical beams 27. In the following description, the space 201 is referred to as “divided space 201”. Each divided space 201 is a substantially rectangular parallelepiped space.

The undulation assisting part 3 includes a torsion coil spring 31. In the example shown in FIGS. 2 and 3, the undulation assisting portion 3 includes six torsion coil springs 31. Each torsion coil spring 31 is disposed on the front side of the support end 23 of the door body 2 and below the first main surface 21 of the door body 2 in the lying posture. 2 and 3, in order to facilitate understanding of the shape of the torsion coil spring 31, the torsion coil spring 31 positioned below 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 arranged in the width direction while being separated from each other at substantially the same position in the front-rear direction. The six torsion coil springs 31 have substantially the same structure. The number of torsion coil springs 31 included in the undulation assisting unit 3 may be changed as appropriate. For example, the number of torsion coil springs 31 may be one or two or more.

The torsion coil spring 31 is disposed between the vertical beams 27 of the door body 2 in the lying posture. In the example shown in FIG. 3, the 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 lying posture. Two torsion coil springs 31 are arranged in the third and fifth divided spaces 201 from the left side in FIG. A plate material is not provided on the second main surface 22 side of the divided space 201 in which the torsion coil spring 31 is disposed, and is open downward in FIG. 3.

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 as a buoyancy part, for example. The buoyancy part includes, for example, a buoyancy body such as a foamed resin disposed in a space between the first main surface 21 and the second main surface 22. In addition, the buoyancy part may include a watertight space provided between the first main surface 21 and the second main surface 22.

FIG. 4 is an enlarged perspective view showing one torsion coil spring 31. In FIG. 4, the rightmost torsion coil spring 31 in FIG. 3 is depicted. In FIG. 4, the structure around the torsion coil spring 31 is also drawn. The torsion coil spring 31 includes a coil portion 32, a first arm 33, and a second arm 34. The coil part 32 is a substantially cylindrical part centering on the central axis J2 facing the width direction of the door body 2. In the coil portion 32, a spring material 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 coil portion 32, respectively. Each of the first arm 33 and the second arm 34 extends from the coil portion 32 to the front side when the door body 2 is in the lying posture. In the example shown in FIG. 4, the first arm 33 extends forward from the lower part of the coil part 32, and the second arm 34 extends forward from the upper part of the coil part 32. In a side view facing the width direction, the first arm 33 and the second arm 34 extend from the coil portion 32 in a substantially tangential direction. The length of the first arm 33 and the length of the second arm 34 are substantially the same.

The tip of the first arm 33 is bent at a substantially right angle and extends in a direction away from the coil part 32 in the width direction. The distal end portion of the first arm 33 is inserted into the hole of the connection portion 94 fixed to the floor surface 91 (that is, the bottom portion of the concave portion 93). As a result, the distal 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 surface 91 with a bolt or the like. In the following description, a connection portion between the first arm 33 and the floor surface 91 is referred to as a “first connection portion 331”. The 1st connection part 331 is a hole of the connection part 94 in which the front-end | tip part of the 1st arm 33 is inserted, for example.

The distal end portion of the second arm 34 is bent at a substantially right angle in the opposite direction to the distal end portion of the first arm 33, and extends in a direction away from the coil portion 32 in the width direction. The distal end portion of the second arm 34 is inserted into a hole provided in the stringer 27 of the door body 2. Thereby, the tip of the second arm 34 is connected to the door body 2. In the following description, a connection portion between the second arm 34 and the door body 2 is referred to as a “second connection portion 341”. The second connection portion 341 is, for example, a hole in the vertical beam 27 into which the distal end portion of the second arm 34 is inserted.

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

In a state where the door body 2 is in the lying 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 a state where the door body 2 is in the lying posture, a moment (hereinafter referred to as “standing moment”) acting in the direction of raising the door body 2 is applied to the door body 2 by the restoring force of the torsion coil spring 31. . The angle formed between 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 along the direction in which the central axis J2 of the coil portion 32 faces. is there. 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 in a side view, and the first arm 33 and the second arm 34 are It becomes smaller as it approaches in side view.

In the state where the door body 2 is in the lying posture, the vertical position of the first connecting portion 331 and the vertical position of the second connecting portion 341 are substantially the same. Further, the distance in the front-rear direction between the first connection part 331 and the central axis J2 and the distance in the front-rear direction between the second connection part 341 and the central axis J2 are substantially the same.

In a state where the door body 2 is in the lying posture, the second arm 34 is located above the first arm 33 or the first arm over the entire length in the longitudinal direction from the first connecting portion 331 to the coil portion 32. It is located at substantially the same position in the vertical direction as the arm 33. In other words, the first arm 33 and the second arm 34 do not intersect between the first connection portion 331 and the coil portion 32 in a side view. Preferably, the second arm 34 overlaps with a straight line connecting the rotation axis J1 and the second connection portion 341 in a side view.

In the undulation gate 1, the second arm 34 may be shorter than the first arm 33. In other words, the second connection part 341 may be located on the rear side of the first connection part 331. In this case, the second arm 34 and the extension line to the front side of the second arm 34 are higher than the first arm 33 over the entire length in the longitudinal direction from the first connection portion 331 to the coil portion 32. Alternatively, the first arm 33 and the first arm 33 are located at substantially the same position in the vertical direction. In other words, the first arm 33 and the extension lines of the second arm 34 and the second arm 34 do not intersect between the first connection portion 331 and the coil portion 32 in a side view. Note that, in the undulation gate 1, the first connection portion 331 may be located behind the second connection portion 341.

Next, the standing state of the door body 2 will be described with reference to FIGS. FIG. 10 is a diagram illustrating 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 floor surface 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 lying posture, and is 90 degrees when the door body 2 stands vertically with respect to the floor surface 91. The vertical axis in FIG. 10 indicates the moment around the rotation axis J1 acting on the door body 2 with the counterclockwise moment in FIG. 1 being positive. That is, the positive moment in FIG. 10 is a moment that acts in the direction that causes the door body 2 to fall down (hereinafter referred to as “falling moment”), and the negative moment is an upright that acts in the direction that causes the door body 2 to stand up. It is a moment.

The broken line 81 in FIG. 10 is a moment due to the weight of the door body 2, and the solid line 82 is a moment applied to the door body 2 by the undulation assisting unit 3. A thick solid line 83 in FIG. 10 is a total moment obtained by summing the lines 81 and 82. When the angle of the door body 2 is 0 degree (that is, when the door body 2 is in the lying posture), the absolute value of the falling moment due to the dead weight of the door body 2 is the absolute standing moment by the undulating auxiliary portion 3 in the compressed state. Greater than the value.

As shown in FIG. 5, when the water 90 flows into the undulating gate 1, an erection moment is applied to the door body 2 due to buoyancy 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 standing moment due to the water 90, a falling moment due to the weight of the door body 2 and a standing moment due to the restoring force of the torsion coil spring 31 act on the door body 2.

The standing moment by the torsion coil spring 31 continuously acts on the door body 2 from the lying posture shown in FIG. 5 to the posture shown in FIG. 7 through the posture shown in FIG. Thereby, the standing of the door body 2 is assisted and the rising speed of the door body 2 is increased. As a result, the water 90 can be prevented from flowing from the opening 92 beyond the door body 2. In the state shown in FIG. 7, the torsion coil spring 31 is in a free state in which it is not compressed and expanded. 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, an angle formed by the door body 2 in the intermediate posture and the floor surface 91 (that is, the bottom surface of the recess 93) is referred to as an “intermediate angle”. The intermediate angle is larger than 0 degree and smaller than an angle (in the above example, about 75 degrees) formed by the door body 2 and the floor surface 91 in the maximum standing posture. In other words, the intermediate posture is a posture between the lying posture and the maximum standing posture. The intermediate angle is, for example, not less than 5 degrees and not more than 70 degrees. In the example shown in FIG. 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 may be changed as appropriate.

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

When the door body 2 stands up from the intermediate posture, the angle formed by the first arm 33 and the second arm 34 of the torsion coil spring 31 becomes larger than the free angle, and the torsion coil spring 31 is in an extended state. Thereby, a lodging moment due to the restoring force of the torsion coil spring 31 acts on the door body 2. The lodging moment by the torsion coil spring 31 continuously acts on the door body 2 from the intermediate posture shown in FIG. 7 to the maximum standing posture shown in FIG. 9 through the posture shown in FIG. . As shown in FIG. 9, in a state where the door body 2 is in the maximum standing posture, the first arm 33 of the torsion coil spring 31 extends from the coil portion 32 to the front side, and the second arm 34 extends upward from the coil portion 32. It extends.

In a state where the door body 2 is positioned between the intermediate posture and the maximum standing posture, the door body 2 is subjected to a standing moment due to the water 90, a falling moment due to its own weight, and a falling moment due to the torsion coil spring 31. . Actually, although the falling moment due to the own weight of the torsion coil spring 31 also acts on the door body 2, the torsion coil spring 31 is relatively light, so in the following description, the lowering moment due to the own weight of the torsion coil spring 31 is ignored. In a state where the door body 2 is positioned between the intermediate posture and the maximum standing posture, the angle formed by the first arm 33 and the second arm 34 of the torsion coil spring 31 gradually increases as the angle of the door body 2 increases. The absolute value of the falling moment imparted to the door body 2 by the torsion coil spring 31 gradually increases. Further, the coil portion 32 moves upward and in a direction away from the door body 2 as the angle of the door body 2 increases. In other words, the relative position of the coil portion 32 with respect to the floor surface 91 and the door body 2 is changed in accordance with the change in the posture of the door body 2.

In the hoisting gate 1, while the door body 2 stands from the intermediate posture to the maximum standing posture, the falling moment by the torsion coil spring 31 acts on the door body 2, thereby suppressing the standing speed of the door body 2. As shown in FIG. 9, in the state where the door body 2 is in the maximum standing posture, the lodging moment by the torsion coil spring 31 and the water pressure acting on the door body 2 are balanced. In other words, the angle of the door body 2 in the maximum standing posture is determined by the lodging moment by the torsion coil spring 31 and the water pressure acting on the door body 2. As shown in FIG. 7, when the door body 2 stands up to an intermediate position, the water surface of the water 90 is positioned below the movable end portion 24 (that is, the top end) of the door body 2, and thus the door body. 2 is suppressed, the water 90 does not flow from the opening 92 beyond the movable end 24 of the door body 2. In the raising / lowering gate 1, structures, such as a tension rod which restrict | limit that the door body 2 stands up from a predetermined angle, may be provided. Thereby, it can prevent more reliably that the angle of the door body 2 becomes larger than the said 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 due to the falling moment due to the torsion coil spring 31 and the falling moment due to the dead weight of the door body 2. While the door body 2 falls from the maximum standing posture to the intermediate posture, the falling moment by the torsion coil spring 31 continuously acts on the door body 2 in addition to the falling moment due to the weight of the door body 2. Thereby, the fall of the door body 2 is assisted, and the fall of the door body 2 is started promptly after the water level of the water 90 starts to decrease. As a result, it is possible to prevent the door body 2 from rapidly falling down after the water level of the water 90 has greatly decreased and the door body 2 starting to fall down. When the angle of the door body 2 in the maximum standing posture is 90 degrees, when the door body 2 starts to fall down, the falling moment due to the weight of the door body 2 does not work, and only the falling moment due to the torsion coil spring 31 is applied to the door body 2. work.

When the door body 2 falls down from the intermediate position shown in FIG. 7, the torsion coil spring 31 starts to be compressed. While the door body 2 falls from the intermediate posture to the lying posture shown in FIG. 5, the rising moment by the torsion coil spring 31 continuously acts on the door body 2, so that the falling speed of the door body 2 is suppressed. Thereby, the force applied to the floor surface 91 or the like when the door body 2 is in the lying posture can be reduced.

As described above, the undulating gate 1 includes the door body 2 and the undulating auxiliary part 3. In the door body 2 in the lying posture, the movable end portion 24 of the door body 2 is positioned on the front side of the support end portion 23. The door body 2 changes its posture between the lying posture and the maximum standing posture by rotating around the support end 23. The undulation assisting unit 3 includes a torsion coil spring 31. The torsion coil spring 31 is disposed below the upper surface (that is, the first main surface 21) of the door body 2 in the lying posture. The torsion coil spring 31 includes a coil portion 32, a first arm 33, and a second arm 34. In the coil portion 32, a spring material is spirally wound around the central axis J <b> 2 that faces the width direction of the door body 2. The first arm 33 protrudes from the coil part 32. The tip of the first arm 33 is connected to the floor surface 91. The second arm 34 protrudes from the coil part 32. The distal end of the second arm 34 is connected to the door body 2.

In the hoisting gate 1, a standing moment is applied to the door body 2 by the restoring force of the torsion coil spring 31 in a state where the door body 2 is in the lying posture. Further, in the state where the door body 2 is in the maximum standing posture, a lodging moment is applied to the door body 2 by the restoring force of the torsion coil spring 31. Thus, in the undulation gate 1, it is possible to realize both the application of the erection moment when the door body 2 starts to rise and the application of the erection moment when the door body 2 starts falling by the torsion coil spring 31. Thereby, the structure of the undulation gate 1 can be simplified. As a result, it is possible to reduce the manufacturing cost of the undulation gate 1 that can start standing up quickly when water flows in and that can start falling down early when the water level drops.

As described above, the torsion coil spring 31 is disposed below the upper surface of the door body 2 in the lying posture. Thereby, compared with the case where the torsion coil spring 31 is arrange | positioned to the side of the door body 2 (namely, the outer side of the width direction rather than the door body 2), the raising / lowering gate 1 can be reduced in size. As a result, the installation area of the undulation gate 1 can be reduced.

In the undulation gate 1, the torsion coil spring 31 can be arranged on the center side in the width direction with respect to both side portions of the door body 2. For this reason, the force applied to the door body 2 from the torsion coil spring 31 is increased compared to the case where a force is applied only to both sides of the movable end portion of the door body when a moment for assisting standing or lying down is applied to the door body 2. can do. On the other hand, when the same force is applied to the door body 2, the span length of the door body 2 (that is, the width of the door body 2) is larger than when the force is applied only to both sides of the movable end of the door body. Can be increased. Moreover, the member near the movable end 24 of the door body 2 can be downsized, and the manufacturing cost of the undulating gate 1 can be reduced.

As described above, the torsion coil spring 31 is located inside the door body 2 in the lying posture. Thereby, it is not necessary to provide a hole or the like for accommodating the torsion coil spring 31 in the bottom surface (that is, the floor surface 91) of the recess 93. Further, there is no need to provide drainage facilities such as the above holes. Therefore, installation and maintenance of the undulation gate 1 can be facilitated.

The undulation assisting portion 3 further includes another torsion coil spring 31 arranged at a position different from the one torsion coil spring 31 in the width direction. Thus, by providing a plurality of torsion coil springs 31, each torsion coil spring 31 can be reduced in size. Further, the plurality of torsion coil springs 31 are arranged in the width direction, whereby the span length of the door body 2 can be further increased, and the members in the vicinity of the movable end 24 of the door body 2 can be further downsized. You can also As a result, the manufacturing cost of the undulating gate 1 can be further reduced.

In the undulation gate 1, the coil portion 32 of the torsion coil spring 31 is not fixed to the floor surface 91 and the door body 2. Moreover, the relative position of the coil part 32 with respect to the floor surface 91 and the door body 2 is changed with the attitude | position change of the door body 2. FIG. Thus, by making the coil part 32 movable, even when the central axis J2 of the coil part 32 is away from the rotation axis J1 of the door body 2, the second connection part 341 is connected to the door body 2. There is no need to make it relatively movable. Further, it is not necessary to make the first connecting portion 331 relatively movable with respect to the floor surface 91. Therefore, since it is not necessary to provide a moving mechanism such as a roller at the tip of the first arm 33 and the second arm 34, the structure of the undulating gate 1 can be simplified. As a result, the manufacturing cost of the undulating gate 1 can be further reduced.

Further, since the coil portion 32 is not fixed to the floor surface 91 and the door body 2, it is not necessary to arrange the coil portion 32 close to the rotation axis J1 of the door body 2. For this reason, the freedom degree of arrangement | positioning of the coil part 32, the 1st connection part 331, and the 2nd connection part 341 can be improved. Therefore, when the door body 2 is raised and lowered, 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 easily brought close to each other. As a result, it is possible to increase the standing moment and the falling moment applied from the torsion coil spring 31 to the door body 2.

As described above, the torsion coil spring 31 is disposed in front of the support end 23 of the door body 2. In a state where the door body 2 is in the lying posture, the first arm 33 and the second arm 34 extend from the coil portion 32 to the front side. In a state where the door body 2 is in the lying 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 coil portion 32 to the front side, and the second arm 34 extends from the coil portion 32 upward. 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 1st arm 33 and the 2nd arm 34 can be lengthened. That is, the first connection part 331 and the second connection part 341 can be arranged at positions relatively far from the rotation axis J1 of the door body 2. As a result, it is possible to increase the standing moment and the falling moment applied from the torsion coil spring 31 to the door body 2.

As described above, in the state where the door body 2 is in the lying posture, the first arm 34 and the extension line to the front side of the second arm 34 are the first connection that is the connection portion between the first arm 33 and the floor surface 91. Over the entire length of the range from the portion 331 to the coil portion 32, it is located above the first arm 33 or at the same vertical position as the first arm 33. Thereby, when the door 2 is raised and lowered, the direction of the force applied from the torsion coil spring 31 to the door 2 can be brought close to the tangential direction of the rotation of the door 2. As a result, it is possible to increase the standing moment and the falling moment applied from the torsion coil spring 31 to the door body 2. The second arm 34 preferably overlaps with a straight line connecting the rotation axis J1 and the second connection portion 341 in a side view. Thereby, the standing moment and the falling moment applied to the door body 2 from the torsion coil spring 31 can be further increased.

In addition, as described above, the second arm 34 and the extension line to the front side of the second arm 34 are located above the first arm 33 or at the same position in the vertical direction as the first arm 33. When the door body 2 stands up from the lying posture, the first connection portion 331 and the second connection portion 341 gradually move away in the vertical direction as the angle of the door body 2 increases. For this reason, as the angle of the door body 2 increases, the coil portion 32 gradually moves upward and in a direction away from the first main surface 21 of the door body 2, and downward (that is, a direction approaching the floor surface 91) or It does not move in the direction approaching the first main surface 21. As a result, when the door body 2 is raised and lowered, the coil portion 32 is prevented from coming into contact with the bottom surface (that is, the floor surface 91) of the recess 93 or the first main surface 21 of the door body 2, and the door body 2. Smooth undulations can be realized.

Furthermore, in the hoisting gate 1, in a state where the door body 2 is in the lying posture, the vertical position of the first connection portion 331 and the second connection portion 341 that is the connection portion between the second arm 34 and the door body 2 are provided. The position in the vertical direction is the same. Further, the distance in the front-rear direction between the first connection portion 331 and the central axis J2 is the same as the distance in the front-rear direction between the second connection portion 341 and the central axis J2. Thereby, the 2nd connection part 341 can be arrange | positioned in the position comparatively large away from the rotating shaft J1 of the door body 2, implement | achieving smooth undulation of the door body 2 as mentioned above. As a result, it is possible to further increase the standing moment and the falling moment applied from the torsion coil spring 31 to the door body 2.

FIG. 11 is a side view showing another example of the undulation gate 1. 12 is an enlarged perspective view showing the torsion coil spring 31 shown in FIG. In the example shown in FIGS. 11 and 12, the second connecting portion 341 is positioned below the first connecting portion 331 in a state where the door body 2 is in the lying posture. Further, the distance in the front-rear direction between the first connection portion 331 and the central axis J2 is the same as the distance in the front-rear direction between the second connection portion 341 and the central axis J2. For this reason, in a state where the door body 2 is in the lying posture, the second arm 34 intersects the first arm 33 in a side view facing the width direction. Thereby, when the door body 2 is raised and lowered, the direction of the force applied from the torsion coil spring 31 to the door body 2 can be made closer to the tangential direction of the rotation of the door body 2. As a result, the standing moment and the falling moment applied to the door body 2 from the torsion coil spring 31 can be further increased.

In the undulation gate 1 illustrated in FIGS. 11 and 12, the second connection part 341 may be located behind the first connection part 331. In this case, in a state where the door body 2 is in the lying posture, the second arm 34 or an extension line to the front side of the second arm 34 intersects the first arm 33 in a side view facing the width direction. In this case as well, 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 when the door body 2 is raised and lowered can be made closer to each other. As a result, the standing moment and the falling moment applied to the door body 2 from the torsion coil spring 31 can be further increased.

In the undulating gate 1 illustrated in FIGS. 11 and 12, when the door body 2 stands up from the lying posture, the coil portion 32 is located below (that is, in the direction approaching the floor surface 91) or the first of the door body 2. There is a possibility of moving in a direction approaching the main surface 21. In this case, for example, in the first connection portion 331 and the second connection portion 341, it is preferable that play (that is, play) is provided in a hole into which the distal ends of the first arm 33 and the second arm 34 are inserted. By moving the tip portions of the first arm 33 and the second arm 34 within the hole, the coil portion 32 can be prevented or suppressed from moving downward or in a direction approaching the first main surface 21.

FIG. 13 is a plan view showing still another example of the undulating gate 1. In the hoisting gate 1 illustrated in FIG. 13, the door body 2 includes a buoyancy portion 28 located between the first arm 33 and the second arm 34 in the width direction. Thereby, since the buoyancy of the door body 2 can be increased, the door body 2 can be started more quickly when water flows in. The buoyancy unit 28 includes, for example, a buoyancy body such as foamed resin 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 lying posture, the buoyancy unit 28 is located between the first arm 33 and the second arm 34 without contacting the first arm 33 and the second arm 34. In the door body 2, 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) in the divided space 201 in which the torsion coil spring 31 is disposed.

FIG. 14 is a side view showing still another example of the undulating gate 1. The undulating gate 1 illustrated in FIG. 14 further includes a string-like or belt-like standing restriction member 35 that connects the distal end portion of the first arm 33 and the distal end portion of the second arm 34. The standing restriction member 35 extends linearly in a state where the door body 2 is in the maximum standing posture. As described above, the standing restriction member 35 is linear without slack, so that the door body 2 can be prevented from rotating rearward from the maximum standing posture. The standing restriction member 35 is a member that does not substantially expand and contract in the longitudinal direction. The standing restriction member 35 is, for example, a belt-shaped member made of synthetic fiber. In a state where the door body 2 is in the lying posture, the standing restriction member 35 is folded in half at the center in the longitudinal direction and disposed between the first arm 33 and the second arm 34, for example.

The standing restriction member 35 may be attached to each torsion coil spring 31, or may be attached to some torsion coil springs 31 among the plurality of torsion coil springs 31. For example, the standing restriction member 35 may be directly attached to the distal end portion of the first arm 33 and the distal end portion of the second arm 34. Alternatively, as shown in FIG. 15, the standing restriction member 35 is fastened to a hole different from the hole in which the tip of the first arm 33 is inserted in the connection portion 94, and the first arm is connected via the connection portion 94. It may be attached indirectly to the tip of 33. Alternatively, the standing restriction member 35 is fastened to a hole different from the hole into which the distal end portion of the second arm 34 is inserted in the vertical beam 27, and is connected to the distal end portion of the second arm 34 via the vertical beam 27. It may be attached indirectly.

FIGS. 16 to 19 are side views showing still another example of the undulating gate 1. The undulation gate 1 shown in FIG. 16 further includes standing restriction members 351 and 352, and the door body 2 further includes a connection portion 291 and a contact portion 292. In the following description, the standing restriction members 351 and 352 are respectively referred to as “first standing restriction member 351” and “second standing restriction member 352”. The first standing restriction member 351 and the second standing restriction member 352 are string-like or belt-like members that do not substantially expand and contract in the longitudinal direction. The first standing restriction member 351 and the second standing restriction member 352 are, for example, belt-shaped members made of synthetic fiber. The connection part 291 and the contact part 292 are arrange | positioned between the 1st main surface 21 and the 2nd main surface 22 of the door body 2, and are fixed to the 1st main surface 21, for example. The connection part 291 is a member substantially the same as the connection part 94 fixed to the floor surface 91, for example. The contact part 292 is a substantially plate-shaped member, for example.

In the undulation gate 1 shown in FIG. 16, the tip end portion of the first arm 33 of the torsion coil spring 31 is connected to the floor surface 91 via the connection 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 of the first standing restriction member 351 is fixed to the distal end of the second arm 34. The other end portion of the first standing restriction member 351 is fixed to the connection portion 291. In other words, the distal end portion of the second arm 34 is indirectly connected to the door body 2 via the first standing restriction member 351. One end of the second standing restriction member 352 is fixed to the tip of the first arm 33, and the other end is fixed to the tip of the second arm 34. In other words, the second standing restriction member 352 connects the distal end portion of the first arm 33 and the distal end portion of the second arm 34.

As shown in FIG. 16, in a state where the door body 2 is lying down more than the intermediate posture, the distal end portion of the second arm 34 of the torsion coil spring 31 in the compressed state is in contact with the contact portion 292 from below. . Thereby, a standing moment is applied from the torsion coil spring 31 to the door body 2. The same applies to the case where the door body 2 is in the lying posture. In a state where the door body 2 is lying more than the intermediate posture, the first standing restriction member 351 and the second standing restriction member 352 are loose.

As shown in FIG. 17, when the door body 2 is in the intermediate position, the torsion coil spring 31 is in a natural state, and therefore, the standing moment and the falling moment are not applied to the door body 2 from the torsion coil spring 31. In the state where the door body 2 is in the intermediate posture, the first standing restriction member 351 and the second standing restriction member 352 are loose.

When the door body 2 stands up from the intermediate position shown in FIG. 17, the second arm 34 is separated from the door body 2 by the torsion coil spring 31 in the natural state. In addition, since the first standing restriction member 351 and the second standing restriction member 352 are slack, no standing moment and lodging moment are applied from the torsion coil spring 31 to the door body 2.

When the door 2 rises to a certain extent from the intermediate posture, the first standing restriction member 351 extends linearly between the door 2 and the second arm 34 in a natural state separated from the door 2. In the hoisting gate 1, the torsion coil spring 31 is in a natural state from the state in which the door body 2 is in the intermediate position until the first standing restriction member 351 extends linearly, and the torsion coil spring 31 stands up with respect to the door body 2. Moments and lodging moments are not granted.

After the first standing restriction member 351 extends linearly, as the door body 2 stands, the second arm 34 of the torsion coil spring 31 moves through the first standing restriction member 351 as shown in FIG. The body 2 is pulled away from the first arm 33 and the torsion coil spring 31 is in an extended state. Thereby, a lodging moment is applied from the torsion coil spring 31 to the door body 2. In the state shown in FIG. 18, the second standing restriction member 352 is loose.

As shown in FIG. 19, when the door body 2 is in the maximum standing posture, the first standing restriction member 351 and the second standing restriction member 352 extend linearly. As described above, the first standing restriction member 351 and the second standing restriction member 352 are linear without any slack, so that the door body 2 can be prevented from rotating rearward from the maximum standing posture. Further, in the state where the door body 2 is in the maximum standing posture, the torsion coil spring 31 is in the extended state as described above. Thereby, a lodging moment is applied from the torsion coil spring 31 to the door body 2.

As described above, in the undulating gate 1 shown in FIGS. 16 to 19 as well, the torsion coil spring 31 applies the erection moment when the door body 2 starts to stand up, and the door body 2 starts when the gate body 2 starts falling. Both of giving the lodging moment can be realized with a simple structure.

Next, the undulating gate 1a according to the second embodiment of the present invention will be described. FIG. 20 is a side view showing the undulating gate 1a. FIG. 21 is a plan view showing the undulating gate 1a. FIG. 22 is a front view of the undulating gate 1a as viewed from the front. The undulation gate 1a further includes a counterweight mechanism 6 in addition to the components of the undulation gate 1 shown in FIGS. The structure of the undulating gate 1a other than the counterweight mechanism 6 is substantially the same as that of the undulating gate 1 described above. In the following description, the components other than the counterweight mechanism 6 of the undulating gate 1a are assigned the same reference numerals as the corresponding components of the undulating gate 1.

The counterweight mechanism 6 includes a counterweight 61 and a rope 62 that is a string-like or belt-like connecting member. In the example shown in FIGS. 20 to 22, two sets of counterweights 61 and ropes 62 are provided in the counterweight mechanism 6. The two counterweights 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 counterweight 61 is arrange | positioned inside the door stop part 11, for example. One end of a rope 62 is connected to the counterweight 61.

The rope 62 extends forward through two fixed pulleys 63 arranged in the front-rear direction. The fixed pulley 63 is fixed to the door stop 11, for example. The other end of the rope 62 is connected to the movable end 24 of the door body 2 below the front pulley 63. For example, the other end portion of the rope 62 is connected to the protruding portion 241 that protrudes outward in the width direction at the movable end portion 24. The counterweight 61 is suspended by a rope 62 and is spaced upward from the floor surface 91. When the door body 2 is in the lying posture, the absolute value of the falling moment due to the dead weight of the door body 2 is the sum of the standing moment due to the torsion coil spring 31 of the compression assisting portion 3 and the standing moment due to the weight of the counterweight 61. Greater than absolute value.

Next, with reference to FIG. 23 to FIG. 27, the standing state of the door body 2 at the undulating gate 1a will be described. As shown in FIG. 23, when the water 90 flows into the hoisting gate 1a, an erection moment is applied to the door body 2 due to buoyancy 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 rising moment due to the water 90, the door 2 has a falling moment due to its own weight, a rising moment due to the restoring force of the torsion coil spring 31, and a rising moment due to the counterweight 61 (that is, the counterweight 61. Standing moment due to gravity acting on) works.

The standing moment by the torsion coil spring 31 and the standing moment by the counterweight 61 are such that the door body 2 moves from the lying posture shown in FIG. 23 to the intermediate posture shown in FIG. 25 through the posture shown in FIG. Work continuously against 2. Thereby, the standing of the door body 2 is assisted and the rising speed of the door body 2 is increased. In a state where the door body 2 is positioned between the lying posture and the intermediate posture, as the angle of the door body 2 increases, the absolute value of the rising moment by the torsion coil spring 31 and the absolute value of the rising moment by the counterweight 61 are Decrease gradually.

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 expanded. Further, in the present embodiment, when the door body 2 is in an intermediate position, the door body 2 and the rope 62 extending from the movable end 24 of the door body 2 to the front fixed pulley 63 are in a straight line in a side view. Located in. In other words, in a side view, the tangent line extending from the rotation axis J1 of the door body 2 to the lower part of the front pulley 63 overlaps the door body 2 and the rope 62. Thereby, the moment given to the door body 2 from the counterweight 61 becomes substantially zero. The position of the counterweight 61 shown in FIG. 25 is the lowest point of the counterweight 61. Also at the lowest point, the counterweight 61 is suspended by the rope 62 and is spaced upward from the floor surface 91.

When the door body 2 stands up from the second posture, the torsion coil spring 31 is in an extended state, and a falling moment due to the torsion coil spring 31 acts on the door body 2. Further, a lodging moment due to the counterweight 61 (that is, a lodging moment due to gravity acting on the counterweight 61) also acts on the door body 2. The tilting moment by the torsion coil spring 31 and the tilting moment by the counterweight 61 cause the door 2 to move from the intermediate posture shown in FIG. 25 to the maximum standing posture shown in FIG. 27 through the posture shown in FIG. Work continuously against body 2. Thereby, the standing-up speed of the door body 2 is suppressed. In a state where the door body 2 is positioned between the intermediate posture and the maximum standing posture, as the angle of the door body 2 increases, the absolute value of the falling moment by the torsion coil spring 31 and the absolute value of the falling moment by the counterweight 61 are increased. Gradually increases.

When the water level on the front side of the door body 2 starts to fall, the door body 2 starts to fall due to the lodging moment by the torsion coil spring 31, the lodging moment by the counterweight 61, and the lodging moment by the dead weight of the door body 2. While the door body 2 falls from the maximum standing position to the intermediate position shown in FIG. 25, in addition to the falling moment due to the dead weight of the door body 2, the falling moment due to the torsion coil spring 31 and the falling moment due to the counterweight 61 are Work continuously. Thereby, the fall of the door body 2 is assisted, and the fall of the door body 2 is started promptly after the water level of the water 90 starts to decrease.

While the door body 2 falls from the intermediate posture to the lying posture shown in FIG. 23, the standing moment by the torsion coil spring 31 and the standing moment by the counterweight 61 continuously act on the door body 2. Thereby, the falling speed of the door body 2 is suppressed.

As described above, the undulation gate 1a further includes the counterweight 61 and the rope 62 that is a connecting member. The rope 62 suspends the counterweight 61 by connecting the counterweight 61 and the movable end 24 of the door body 2. In the hoisting gate 1a, a standing moment is applied to the door body 2 by the restoring force of the torsion coil spring 31 and the counterweight 61 when the door body 2 is in the lying posture. Further, in the state where the door body 2 is in the maximum standing posture, a lodging moment is applied to the door body 2 by the restoring force of the torsion coil spring 31 and the counterweight 61.

Thereby, the torsion coil spring 31 can be reduced in size. Further, the weight of the counterweight 61 can be reduced as compared with the case where the counterweight mechanism 6 is provided without providing the undulation assisting portion 3. Thereby, the span length (namely, the width | variety of the door body 2) of the door body 2 can be increased. Moreover, the member near the movable end 24 of the door body 2 can be downsized, and the manufacturing cost of the undulating gate 1a can be reduced.

Next, the undulating gate 1b according to the third embodiment of the present invention will be described. FIG. 28 is a side view of the undulating gate 1b. In the undulation gate 1 b, the rotation axis J <b> 1 of the door body 2 is positioned below the second main surface 22 of the door body 2 at the support end 23 of the door body 2. Further, the floor surface 91 extends downward slightly on the front side 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 surface 95 (that is, on the rear side of the vertical floor surface 95). The support end 23 of the door body 2 extends rearward from the vertical floor surface 95. In the hoisting gate 1b, the door body 2 rotates about the rotation axis J1 of the support end 23 as a fulcrum, thereby changing the posture between the lying posture shown by the solid line and the maximum standing posture shown by the two-dot chain line. change. A gap between the standing door body 2 and the floor surface 91 is closed by a seal member 96 (for example, a thin plate-like watertight rubber) that connects the door body 2 and the vertical floor surface 95 in front of the rotation axis J1.

The undulation assisting portion 3b of the undulation gate 1b includes a torsion coil spring 31b. The undulation assisting part 3 b includes, for example, a plurality of torsion coil springs 31 b arranged in the width direction of the door body 2. Each torsion coil spring 31 b is arranged on the rear side of the rotation axis J <b> 1 that is a fulcrum of the door body 2. Each torsion coil spring 31b is disposed below the first main surface 21 of the door body 2 in the lying posture. The plurality of torsion coil springs 31b have the same structure. The number of torsion coil springs 31b included in the undulation assisting portion 3b may be changed as appropriate. The number of torsion coil springs 31b may be 1, for example, or 2 or more.

The torsion coil spring 31b includes a coil portion 32, a first arm 33, and a second arm 34, similarly to the torsion coil spring 31 shown in FIG. The coil part 32 is a substantially cylindrical part centering on the central axis J2 facing the width direction of the door body 2. In the coil portion 32, a spring material is spirally wound around a central axis J2 substantially parallel to the width direction. The coil portion 32 is not fixed to the floor surface 91 and the door body 2. In the state in which the door body 2 is in the lying posture, the coil 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 coil portion 32, respectively. In a state where the door body 2 is in the lying posture, the first arm 33 extends downward from the coil portion 32. The distal end portion of the first arm 33 is inserted into the hole of the connecting portion 94 fixed to the vertical floor surface 95 of the floor surface 91. As a result, the distal 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 lying posture, the second arm 34 extends from the coil portion 32 to the rear side. The distal end portion of the second arm 34 is inserted into a hole provided in the vertical beam 27 (see FIG. 4) of the door body 2. Thereby, the tip of the second arm 34 is connected to the door body 2.

In the state where the door body 2 is in the lying 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 extended more than the free state. Therefore, in a state where the door body 2 is in the lying posture, a standing moment is applied to the door body 2 by the restoring force of the torsion coil spring 31b. The standing moment by the torsion coil spring 31b continuously acts on the door body 2 until the posture of the door body 2 changes from the lying posture to the intermediate posture.

The angle formed between 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 along the direction in which the central axis J2 of the coil portion 32 faces. is there. 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 in a side view, and the first arm 33 and the second arm 34 are It becomes smaller as it approaches in side view.

28, the first arm 33 and the second arm 34 extend downward from the coil portion 32 in a state in which 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 the state where the door body 2 is in the maximum standing posture, a lodging moment is applied to the door body 2 by the restoring force of the torsion coil spring 31b. The falling moment by the torsion coil spring 31b continuously acts on the door body 2 until the posture of the door body 2 reaches the maximum standing posture from the intermediate posture.

In the hoisting gate 1b, in the same manner as the hoisting gate 1 shown in FIG. 1, in the state where the door body 2 is in the lying down posture, a rising moment is applied to the door body 2 by the restoring force of the torsion coil spring 31b. In addition, in the state where the door body 2 is in the maximum standing posture, a lodging moment is applied to the door body 2 by the restoring force of the torsion coil spring 31b. Thus, in the undulation gate 1b, the torsion coil spring 31b can realize both the application of the standing moment when the door body 2 starts to stand up and the provision of the lodging moment when the door body 2 starts to fall. Thereby, the structure of the undulation gate 1b can be simplified. As a result, it is possible to reduce the manufacturing cost of the undulation gate 1b that can start to stand up quickly when water flows in and that can start falling down early when the water level drops.

Further, the torsion coil spring 31b is disposed below the upper surface (that is, the first main surface 21) of the door body 2 in the lying posture. Thereby, compared with the case where the torsion coil spring 31b is arrange | positioned to the side of the door body 2 (namely, the outer side of the width direction rather than the door body 2), the raising / lowering gate 1b can be reduced in size. As a result, the installation area of the undulation gate 1b can be reduced.

In the undulation gate 1b, the torsion coil spring 31b is arranged behind the pivot point of the door body 2 (that is, the rotation axis J1 of the support end 23). In a state where the door body 2 is in the lying posture, the first arm 33 extends downward from the coil portion 32, and the second arm 34 extends from the coil portion 32 to the rear side. In a state where the door body 2 is in the lying posture, the angle formed by the first arm 33 and the second arm 34 is larger than the free angle. In a state where the door body 2 is in the maximum standing posture, the first arm 33 and the second arm 34 extend downward from the coil 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 smaller than the free angle.

Thus, the undulating gate 1b can be installed even on the floor surface 91 having the vertical floor surface 95 extending downward from the middle in the longitudinal direction of the door body 2. In addition, 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 part. As a result, the rising speed of the door body 2 can be increased.

In the undulation gate 1b, the coil part 32 is not fixed to the floor surface 91 and the door body 2 in the same manner as the undulation gate 1 shown in FIG. 2 is changed. Thereby, the structure of the undulation gate 1b can be simplified. As a result, the manufacturing cost of the undulating gate 1b can be further reduced.

In the undulation gate 1b, a counterweight mechanism 6 may be provided in addition to the undulation assisting portion 3b, similarly to the undulation gate 1a shown in FIG. Thereby, the torsion coil spring 31b can be reduced in size. Further, the weight of the counterweight 61 can be reduced as compared with the case where the counterweight mechanism 6 is provided without providing the undulating auxiliary portion 3b. Thereby, the span length (namely, the width | variety of the door body 2) of the door body 2 can be increased. Moreover, the member near the movable end 24 of the door body 2 can be downsized, and the manufacturing cost of the undulating gate 1b can be reduced.

The above-described undulation gates 1, 1a, 1b can be variously changed.

For example, in the undulation gate 1, the connection structure between the first arm 33 and the floor surface 91 in the first connection portion 331 may be variously changed. Further, the connection structure between the second arm 34 and the door body 2 in the second connection portion 341 may be variously changed. For example, the tip of the second arm 34 and the door body 2 may be indirectly connected via a string-like or belt-like member that does not substantially expand and contract. Accordingly, the torsion coil spring 31 can be reduced in size, and the second connection portion 341 can be disposed at a position far away from the rotation axis J1. The same applies to the undulation gates 1a and 1b.

In the undulation gates 1, 1 a, the coil portion 32 of the torsion coil spring 31 may be fixed to the floor surface 91. In this case, a roller or the like that is always in contact with the door body 2 and is movable on the door body 2 is provided at the tip of the second arm 34, and the second arm 34 is connected to the door body 2 via the roller or the like. Is done. In the undulation gates 1 and 1 a, the coil 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 always in contact with the floor surface 91 and is movable on the floor surface 91 is provided at the tip of the first arm 33, and the first arm 33 is connected to the floor surface 91 via the roller or the like. Is done. The same applies to the undulation gate 1b.

In the undulation gates 1 and 1a, a hole or the like may be provided on the bottom surface of the recess 93, and the lower part of the torsion coil spring 31 may be accommodated in the hole or the like. Moreover, the recessed part 93 is not provided in the floor surface 91, but the door body 2 of a lying posture may be installed in the flat floor surface 91 of the substantially same height as the circumference | surroundings. Also in the undulation gate 1b, the door body 2 in a lying posture may be installed on a flat floor surface 91 having a height substantially the same as the surrounding area.

The structure of the undulation gates 1, 1a, 1b may be applied to undulation gates other than the undulation gate (so-called floating type undulation gate) in which the door body 2 rises automatically by water pressure. For example, the structure of the above-described undulation gates 1, 1a, 1b may be applied to a undulation gate for raising the door body 2 manually or a undulation gate for raising the door body 2 with a hydraulic cylinder or an electric jack.

The configurations in the above embodiment and each modification may be combined as appropriate as long as they do not contradict each other.

Although the invention has been described in detail, the above description is illustrative and not restrictive. Therefore, it can be said that many modifications and embodiments are possible without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 1a, 1b Undulating gate 2 Door body 3, 3b Undulating auxiliary part 21 (Main body) 1st main surface 23 Support end part 24 Movable end part 28 Buoyancy part 31, 31b Torsion coil spring 32 Coil part 33 1st arm 34 Second arm 35, 351, 352 Standing restriction member 61 Counterweight 62 Rope 91 Floor 92 Opening 331 First connecting portion 341 Second connecting portion J1 Rotating shaft J2 Central axis

Claims (9)

1. An undulating gate provided at the opening and standing up when the water flows from the opening to shield the opening;
   In the lying posture, the movable end portion is positioned on the front side where water flows in from the supporting end portion, and rotates about the supporting end portion as a fulcrum, so that the posture between the lying posture and the maximum standing posture is A door that changes its posture,
   A undulation assisting portion including a torsion coil spring disposed on the lower side of the upper surface of the door body in the lying posture;
   With
   The torsion coil spring is
   A coil portion in which a spring material is spirally wound around a central axis facing the width direction of the door body;
   A first arm protruding from the coil portion and having a tip connected to the floor surface;
   A second arm protruding from the coil portion and having a tip portion connected to the door body;
   With
   In the state where the door body is in the lying posture, a standing moment is applied to the door body by the restoring force of the torsion coil spring,
   In the state where the door body is in the maximum standing posture, a lodging moment is applied to the door body by the restoring force of the torsion coil spring.
2. The undulating gate according to claim 1,
   The torsion coil spring is disposed on the front side of the support end,
   In a state where the door body is in the lying posture, the first arm and the second arm extend from the coil portion to the front side, and an angle formed by the first arm and the second arm is a free angle. Smaller than
   In the state where the door body is in the maximum standing posture, the first arm extends from the coil portion to the front side, the second arm extends upward from the coil portion, and the first arm and the The angle formed with the second arm is larger than the free angle.
3. The undulating gate according to claim 2,
   In the state where the door body is in the lying posture, the second arm and the extension line to the front side of the second arm are connected from the first connecting portion which is a connecting portion between the first arm and the floor surface. It is located above the first arm or at the same position in the vertical direction as the first arm over the entire length of the range reaching the coil portion.
4. The undulating gate according to claim 2,
   In a state where the door body is in the lying posture, the second arm or an extension line to the front side of the second arm intersects the first arm in a side view facing the width direction.
5. The undulation gate according to any one of claims 2 to 4,
   The said door body is provided with the buoyancy part located between the said 1st arm and the said 2nd arm regarding the said width direction.
6. A relief gate according to any one of claims 2 to 5,
   A string-like or belt-like standing restriction member that connects the tip of the first arm and the tip of the second arm;
   In the state where the door body is in the maximum standing posture, the standing restriction member extends linearly.
7. The undulating gate according to claim 1,
   The torsion coil spring is disposed behind the fulcrum;
   In the state where the door body is in the lying posture, the first arm extends downward from the coil portion, the second arm extends from the coil portion to the rear side, and the first arm and the The angle formed by the second arm is larger than the free angle,
   In a state where the door body is in the maximum standing posture, the first arm and the second arm extend downward from the coil portion, and an angle formed by the first arm and the second arm is a free angle. Smaller than.
8. The undulating gate according to any one of claims 1 to 7,
   The coil portion is non-fixed to the floor surface and the door body,
   A relative position of the coil portion with respect to the floor surface and the door body is changed in accordance with a change in the posture of the door body.
9. The undulating gate according to any one of claims 1 to 8,
   Counterweight,
   A connecting member that connects the counterweight and the movable end of the door body to suspend the counterweight;
   Further comprising
   In the state where the door body is in the lying posture, a standing moment is applied to the door body by the counterweight,
   In the state where the door body is in the maximum standing posture, a fall moment is applied to the door body by the counterweight.

Images