JP6856487B2 - Floating undulating gate and its installation method - Google Patents

Description

The present application relates to a floating undulating gate and a method for installing the floating gate.

Floating undulating gates have been known to prevent flooding and tsunami inundation. For example, the floating undulating gate disclosed in Patent Document 1 includes a door body that stands up by the buoyancy of water when flooded. Further, the floating undulating gate is provided with an auxiliary drive unit that assists the standing operation of the door body. That is, wire ropes are attached to both ends in the width direction at the tip of the door body, and counterweights are attached to the wire ropes. A pulling force by the counterweight acts on the door body in the collapsed state, and this pulling force assists the standing operation of the door body.

Japanese Unexamined Patent Publication No. 2012-241449

By the way, in the floating undulating gate as described above, the door body in the laid-down state may be in a state where both ends in the width direction are bent upward due to the pulling force of the auxiliary driving unit. Such displacement (bending) becomes more remarkable as the width (length in the span direction) of the door body increases. When a large displacement occurs, for example, when a fallen door body forms a part of the road surface, the flatness of the road surface is impaired, which hinders passage.

Therefore, it is conceivable to provide a production camber (reverse warp) in advance when the door body is produced. However, since the displacement amount of the door body described above varies depending on the manufacturing accuracy of the door body, the finishing accuracy of the installation surface at the site, and the like, the displacement of the door body may not be sufficiently suppressed by the pre-installed manufacturing camber.

The technique disclosed in the present application has been made in view of such circumstances, and an object thereof is to sufficiently suppress displacement (bending) caused by a pulling force in a door body in a collapsed state.

The floating undulating gate of the present application includes a door body, an auxiliary driving unit, an axial force applying portion, and an axial force changing portion. The door body rotates and stands up due to the buoyancy of the infiltrated water. The auxiliary drive unit constantly exerts a pulling force for assisting the standing operation of the door body on both ends in the width direction of the door body in the collapsed state. The axial force applying portion applies an axial force in the width direction to the door body to generate a bending moment that opposes the bending moment generated by the action of the pulling force in the door body in the collapsed state. .. The axial force changing portion can change the magnitude of the axial force by the axial force applying portion.

Further, in the method of installing the floating undulating gate of the present application, the step of installing the door body that rotates and stands up by the buoyancy of the infiltrating water in the laid-down state and the pulling force for assisting the standing operation of the door body are laid down. By applying a step of acting on both ends of the door body in the width direction in the state and applying an axial force in the width direction to the door body, the bending moment generated by the action of the pulling force in the door body in the collapsed state is resisted. It is provided with a step of generating the bending moment to be performed and changing the magnitude of the axial force so that the bending moments of both are equal to each other.

According to the floating undulating gate of the present application and the installation method thereof, the displacement (bending) caused by the pulling force in the laid-down door body can be sufficiently suppressed.

FIG. 1 is a view showing a schematic configuration of a floating undulating gate according to an embodiment when it is laid down, as viewed from the side surface. FIG. 2 is a diagram showing a schematic configuration of a floating undulating gate according to an embodiment when it is laid down, as viewed from the upstream side. FIG. 3 is a view corresponding to FIG. 1 showing a floating undulating gate during standing up. FIG. 4 is a view corresponding to FIG. 1 showing the standing state of the floating undulating gate. FIG. 5 is a view showing the tip end portion of the door body when lying down as viewed from the upstream side. FIG. 6 is a view corresponding to FIG. 5 showing the tip end portion of the door body according to the modified example of the embodiment.

Hereinafter, embodiments of the present application will be described with reference to the drawings. It should be noted that the following embodiments are essentially preferred examples and are not intended to limit the scope of the techniques disclosed in the present application, their applications, or their uses.

The floating undulating gate 1 of the present embodiment (hereinafter, also simply referred to as undulating gate 1) is installed on the road surface R (land) to prevent water from entering the living space or underground space due to flood, tsunami, or heavy rain. It is also called a floating flap gate. The undulating gate 1 automatically performs an upright operation and an undulating operation by utilizing the water to be infiltrated. As shown in FIGS. 1 and 2, the undulating gate 1 includes a door body 10, a door stop 18, an auxiliary drive unit 20, and a storage unit 25.

The door body 10 is formed in a slightly flat and substantially rectangular body. The door body 10 has a rotation shaft 11 on the base end side, and is rotatably provided around the rotation shaft 11. The door body 10 rotates clockwise in FIG. 1 to perform an upright operation, and rotates counterclockwise in FIG. 1 to perform a lodging operation. The door body 10 is normally in a laid-down state (state shown in FIG. 1), and in an emergency (that is, when water has infiltrated), the door body 10 rotates from the laid-down state and stands up due to the buoyancy of the infiltrated water. It is configured as follows. That is, the door body 10 starts the standing operation by utilizing the infiltrated water.

In addition, in FIG. 1, water is assumed to infiltrate from the left side. Further, the "upstream side" and "downstream side" described below are intended to be the upstream side (left side in FIG. 1) and the downstream side (right side in FIG. 1) in the water intrusion direction.

In the collapsed state, the door body 10 has a front portion 13 on the lower side, a back portion 14 on the upper side, a front end portion 12 on the upstream side, and side portions 15 on the left and right sides when viewed from the upstream side. The door stop 18 is provided on the left side and the right side of the door body 10 when viewed from the upstream side. A watertight rubber (not shown) is attached to a side surface portion 15 of the door body 10 which is a portion facing the door stop 18, and the door body 10 is watertight when the watertight rubber comes into contact with the door stop 18.

The auxiliary drive unit 20 has a function of assisting the standing operation of the door body 10 and a function of adjusting the standing speed and the lodging speed of the door body 10. The auxiliary drive unit 20 has a counterweight 21, a wire rope 22, a fixed pulley 23 on the upstream side, and a fixed pulley 24 on the downstream side.

One fixed pulley 23 on the upstream side and one fixed pulley 24 on the downstream side are provided for each door. The upstream fixed pulley 23 is provided on the upstream side of the door stop 18, and the downstream fixed pulley 24 is provided on the downstream side of the door stop 18. Two wire ropes 22 are attached to the door body 10. One end of the two wire ropes 22 is attached to the tip portion 12 of the door body 10. Specifically, one ends of the two wire ropes 22 are attached to both ends in the width direction of the door body 10, that is, the left end portion and the right end portion in the width direction (left-right direction in FIG. 2) of the door body 10. .. The other end of the wire rope 22 is attached to the counterweight 21 via the fixed pulley 23 on the upstream side and the fixed pulley 24 on the downstream side in this order.

In this way, the door body 10 and the counterweight 21 are connected via the wire rope 22. Therefore, the weight of the counterweight 21 always acts on the door body 10 in the collapsed state (when lying down) as a force for pulling up the tip portion 12 of the door body 10 (hereinafter, referred to as a pulling force). The door body 10 is assisted in standing up by a pulling force. As described above, the auxiliary drive unit 20 constantly exerts a pulling force for assisting the standing operation of the door body 10 on both ends in the width direction of the door body 10 in the collapsed state.

The storage unit 25 stores the door body 10 when it falls down. The storage portion 25 is a concave portion formed on the road surface R, and is formed in a rectangular shape larger than the door body 10 in a plan view. When the door body 10 is stored in the storage portion 25, that is, when the door body 10 is laid down, the back surface portion 14 of the door body 10 and the road surface R are substantially flush with each other. Normally, a vehicle passing through the road surface R will pass through the back surface portion 14 of the door body 10. That is, the door body 10 in the collapsed state constitutes a part of the road surface R.

The standing motion and the lodging motion of the door body 10 will be described with reference to FIGS. 3 and 4. When water enters the door body 10 in the collapsed state, the door body 10 starts to stand up due to the buoyancy of the infiltrated water. At that time, since the pulling force by the counterweight 21 acts on the door body 10, the door body 10 is pulled in the standing direction by the pulling force and the standing operation is assisted. The counterweight 21 descends as the door body 10 stands up. As the door body 10 stands up, water accumulates on the upstream side of the door body 10 and the water level rises. Therefore, the door body 10 is pushed in the standing direction by the water pressure, and the standing operation is assisted.

Then, as shown in FIG. 3, when the inclination angle θ of the door body 10 becomes a predetermined angle (for example, 45 degrees), the wire rope 22 extending from the fixed pulley 23 to the door body 10 and the door body 10 become a straight line. The counterweight 21 reaches the lowest point. When the inclination angle θ of the door body 10 exceeds a predetermined angle, the counterweight 21 rises as the door body 10 stands up. Then, as shown in FIG. 4, when the inclination angle θ of the door body 10 reaches, for example, 90 degrees, the door body 10 is in a completely upright state and the standing operation is completed. At this time, the counterweight 21 reaches the highest point. In this way, when the counterweight 21 is rising, the counterweight 21 acts as a resistance and the standing speed of the door body 10 is reduced. Therefore, the impact generated when the standing operation of the door body 10 is completed can be alleviated.

The upright door body 10 shown in FIG. 4 starts a lodging operation as the water level drops. At that time, the door body 10 is pulled in the lodging direction by the counterweight 21, and the lodging operation is assisted. In this way, the door body 10 falls down following the decrease in the water level. The counterweight 21 descends as the door body 10 falls down. Then, when the inclination angle θ of the door body 10 becomes smaller than the predetermined angle (45 degrees), the counterweight 21 rises as the door body 10 falls down. Then, as shown in FIG. 1, when the inclination angle θ of the door body 10 reaches 0 degrees, the door body 10 is completely laid down and the laying down operation is completed. That is, the door body 10 is in a state of being stored in the storage unit 25. At this time, the counterweight 21 reaches the highest point. In this way, when the counterweight 21 is rising, the counterweight 21 acts as a resistance, and the lodging speed of the door body 10 is reduced. Therefore, the impact generated when the falling operation of the door body 10 is completed can be alleviated. The inclination angle θ is the inclination angle of the door body 10 with respect to the horizontal plane.

Further, the undulating gate 1 includes a displacement suppressing mechanism 30 provided on the door body 10. Hereinafter, the displacement suppressing mechanism 30 will be described with reference to FIG. The displacement suppressing mechanism 30 suppresses or eliminates the displacement (bending) caused by the pulling force Fa acting on the door body 10 in the collapsed state. In FIG. 5, the left-right direction is the width direction of the door body 10.

In the door body 10 in the collapsed state, since the pulling force Fa by the counterweight 21 acts on both ends in the width direction, an upward bending moment Ma is generated at both ends in the width direction. That is, in the door body 10, both ends in the width direction are warped and displaced. The displacement suppressing mechanism 30 suppresses or eliminates the displacement (bending) that occurs in the door body 10 in the collapsed state in this way.

The displacement suppressing mechanism 30 is attached to an end surface (hereinafter, referred to as a tip surface) of the tip portion 12 of the door body 10. The door body 10 has a tip member 12a forming a tip surface, and a displacement suppressing mechanism 30 is attached to the outer surface of the tip member 12a. Further, the displacement suppressing mechanism 30 is attached to the tip member 12a at the time of lodging below the member shaft X of the tip member 12a (front portion 13 side). The member axis X is an axial axis in the longitudinal direction passing through the center of gravity of the member (tip member 12a), and the center of gravity is a point at which the primary cross-sectional moment with respect to an arbitrary axis passing through the point becomes zero.

The displacement suppressing mechanism 30 has two rod members 31a and 31b, two fixing members 32a and 32b, and one turnbuckle 33.

The two fixing members 32a and 32b are fixed to both ends in the width direction of the tip member 12a, respectively. The two rod members 31a and 31b extend in the width direction of the door body 10. The turnbuckle 33 is located between the two fixing members 32a and 32b, and one ends (inner side ends) of the two rod members 31a and 31b are connected to both sides thereof. The other ends (outer end portions) of the two rod members 31a and 31b are fixed to the two fixing members 32a and 32b, respectively. That is, the rod members 31a and 31b are connected to the door body via the fixing members 32a and 32b. The rod members 31a, 31b, the fixing members 32a, 32b, and the turnbuckle 33 are provided coaxially with each other. That is, the rod members 31a, 31b, the fixing members 32a, 32b, and the turnbuckle 33 are connected in the width direction of the door body 10.

A male screw is formed at one end (inner end) of the rod members 31a and 31b, and the rod members 31a and 31b and the turnbuckle 33 are connected by screwing. The turnbuckle 33 is rotatably connected to the rod members 31a and 31b. In the displacement suppressing mechanism 30, the rod members 31a and 31b and the fixing members 32a and 32b are pulled inward (that is, on the turnbuckle 33 side) by rotating the turnbuckle 33 in a certain direction.

The rod members 31a and 31b and the fixing members 32a and 32b are configured to apply an axial force Fb to the door body 10 by being pulled inward. The axial force Fb acts in the width direction of the door body 10 and is an inward force (compressive force). As the axial force Fb is generated in the door body 10 in this way, a downward bending moment Mb that opposes the above-mentioned bending moment Ma is generated in the door body 10. That is, the rod members 31a, 31b and the fixing members 32a, 32b apply the axial force Fb in the width direction to the door body 10, so that the bending moment Ma generated by the action of the pulling force Fa in the door body 10 in the collapsed state is applied. It constitutes an axial force applying portion that generates a bending moment Mb that opposes it.

The turnbuckle 33 constitutes an axial force changing portion that changes the magnitude of the axial force Fb. The magnitude of the axial force Fb is changed by the amount of rotation of the turnbuckle 33. That is, the axial force Fb increases as the amount of rotation of the turnbuckle 33 increases, and the bending moment Mb increases as the axial force Fb increases.

Next, the method of installing the undulating gate 1 described above will be described. The method of installing the undulating gate 1 includes a main body installation step, an assisting force acting step, and a displacement suppressing step.

First, the main body installation process is performed. The main body installation process is a process of installing the door body 10, the door stop 18, and the auxiliary drive unit 20 at the site. The door body 10 is installed in a prone state. Then, the assisting force action step is performed. The assisting force acting step is a step of applying a pulling force Fa to both ends in the width direction of the door body 10 in the collapsed state. Specifically, by attaching the wire rope 22 of the auxiliary drive unit 20 to both ends in the width direction of the door body 10 in the collapsed state, the pulling force Fa by the counterweight 21 acts on the door body 10. Then, an upward bending moment Ma is generated at both ends in the width direction of the door body 10, and both ends in the width direction of the door body 10 are warped and displaced.

Next, a displacement suppressing step is performed. The displacement suppressing step is a step of applying an axial force Fb to the door body 10 to generate a bending moment Mb that opposes the bending moment Ma generated in the door body 10 by the action of the pulling force Fa. Further, the displacement suppressing step is a step of changing the magnitude of the axial force Fb so that the two bending moments Ma and Mb described above are equal to each other. Specifically, the displacement (bending moment Ma) generated in the door body 10 is suppressed or eliminated by the displacement suppressing mechanism 30. More specifically, by rotating the turnbuckle 33 in a certain direction, an axial force Fb is generated on the door body 10. Since the axial force Fb is generated in the door body 10 at a position lower than the member shaft X, a downward bending moment Mb is generated in the door body 10. That is, a bending moment Mb is generated that opposes the bending moment Ma generated by the pulling force Fa. Then, the rotation amount of the turnbuckle 33 is adjusted so that a bending moment Mb that can suppress or eliminate the displacement (bending moment Ma) of the door body 10 is generated. As a result, the bending moment Mb can be generated according to the displacement amount of the door body 10 actually generated after the installation, so that the displacement of the door body 10 can be sufficiently suppressed or eliminated.

As described above, the undulating gate 1 of the above-described embodiment is a rod member 31a that generates a bending moment Mb that opposes the bending moment Ma generated by the pulling force Fa by applying the axial force Fb to the door body 10 in the laid-down state. , 31b and fixing members 32a, 32b (axial force applying portion). Further, the undulating gate 1 of the above embodiment includes a turnbuckle 33 (axial force changing portion) capable of changing the magnitude of the axial force Fb. According to this configuration, the displacement (bending moment Ma) of the door body 10 actually generated by the pulling force Fa after the door body 10 or the like is installed can be sufficiently suppressed or eliminated. As a result, the flatness of the door body 10 in the collapsed state can be ensured, so that the obstruction of passage can be eliminated.

Further, in the method of installing the undulating gate 1 of the above embodiment, after the door body 10 or the like is installed and the pulling force Fa is applied to the door body 10, the bending moment Mb that opposes the bending moment Ma generated by the pulling force Fa. Axial force Fb was applied to the door body 10 to adjust the magnitude of the axial force Fb. Therefore, as described above, the displacement (bending moment Ma) of the door body 10 that actually occurs after the installation of the door body 10 or the like can be sufficiently suppressed or eliminated.

(Modified example of the embodiment)
In this modification, in the displacement suppression mechanism 30 of the above embodiment, the door body 10 is divided into a plurality of sections (two in this modification) in the width direction thereof. The rod members and turnbuckles described in the above-described embodiment are paired with each other and are provided in pairs in each of the above-described sections.

Specifically, as shown in FIG. 6, the displacement suppressing mechanism 30 of this modified example includes four rod members 35a, 35b, 35c, 35d, three fixing members 36a, 36b, 36c, and two turnbuckles. It has 37a and 37b. That is, the displacement suppressing mechanism 30 has two pairs of one turnbuckle and two rod members.

The three fixing members 36a, 36b, and 36c are fixed to both end portions and the center portion in the width direction of the tip member 12a, respectively. The turnbuckle 37a is located between the fixing member 36a at the left end and the fixing member 36c at the center, and one ends (inner ends) of the two rod members 35a and 35b are connected to both sides. .. The other ends (outer end portions) of the two rod members 35a and 35b are fixed to the fixing members 36a and 36c. The other turnbuckle 37b is located between the fixing member 36b at the right end and the fixing member 36c at the center, and one ends (inner end) of the two rod members 35c and 35d are connected to both sides. Has been done. The other ends (outer end portions) of the two rod members 35c and 35d are fixed to the fixing members 36b and 36c. As described above, in this modification, the tip surface of the door body 10 is divided into two sections in the width direction thereof, and one turnbuckle 37a (37b) and two rod members 35a, 35b (35c, A pair of 35d) is provided.

Also in the displacement suppressing mechanism 30 of this modification, by rotating the turnbuckles 37a and 37b in a certain direction, an axial force Fb as a compressive force is generated at a position below the member axis X on the door body 10. That is, by rotating the turnbuckle 37a on the left side, an axial force Fb is generated between the two fixing members 36a and 36c, that is, in the left half portion in the width direction of the door body 10. Due to the generation of this axial force Fb, a downward bending moment Mb is generated in the left half of the door body 10. By rotating the turnbuckle 37b on the right side, an axial force Fb is generated between the two fixing members 36b and 36c, that is, in the right half portion in the width direction of the door body 10. Due to the generation of this axial force Fb, a downward bending moment Mb is generated in the right half of the door body 10.

The bending moment Mb generated in the left half of the door body 10 opposes the bending moment Ma generated in the left half of the door body 10 due to the pulling force Fa. The bending moment Mb generated in the right half of the door body 10 opposes the bending moment Ma generated in the right half of the door body 10 due to the pulling force Fa. Therefore, even in this modification, the displacement (bending moment Ma) of the door body 10 caused by the pulling force Fa can be sufficiently suppressed or eliminated.

Further, in this modification, the magnitudes of the bending moments Mb generated in the left half and the right half of the door body 10 can be made different by adjusting the rotation amounts of the two turnbuckles 37a and 37b, respectively. it can. As a result, it is possible to individually deal with the displacement (bending moment Ma) generated in the left half portion and the right half portion of the door body 10. The amount of displacement that occurs between the left half and the right half of the door body 10 may differ depending on the manufacturing accuracy of the door body, the finish accuracy of the installation surface at the site, and the like. Even in such a case, in this modification, an appropriate bending moment Mb can be generated according to the amount of displacement on each of the left and right sides. Therefore, the displacement of the door body 10 caused by the pulling force Fa can be more sufficiently suppressed or eliminated. Other configurations, actions and effects are the same as in the above embodiment.

In the above embodiment and the modified example, the axial force applying portion and the axial force changing portion are described as rod members 31a, 31b, 35a, 35b, 35c, 35d and turnbuckles 33, 37a, 37b, respectively. The techniques disclosed in the present application are not limited to this.

Further, in the above modification, the door body 10 is divided into two sections in the width direction, but the technique disclosed in the present application is not limited to this, and the door body 10 may be divided into three or more sections.

Further, in the above embodiment and the modified example, the axial force Fb is applied by the axial force applying portion after the pulling force Fa is applied to the door body 10, that is, after the bending moment Ma is generated by the pulling force Fa. However, the technique disclosed in the present application may be as follows. The axial force Fb may be applied in advance by the axial force applying portion before the pulling force Fa is applied to the door body 10, that is, before the bending moment Ma is generated by the pulling force Fa. Then, after the pulling force Fa is applied to the door body 10 and the displacement is actually generated, the axial force Fb is changed (adjusted) by the axial force changing portion according to the displacement. As described above, in the technique disclosed in the present application, the timing of applying the axial force Fb to the door body 10 by the axial force applying portion may be either before or after the displacement due to the pulling force Fa occurs.

As described above, the technique disclosed in the present application is useful for floating undulating gates.

1 Floating undulating gate 10 Door body 20 Auxiliary drive units 31a, 31b Rod members (axial force applying unit)
32a, 32b fixing member (axial force applying part)
33 Turnbuckle (Axle force change part)
35a, 35b, 35c rod member (axial force applying part)
36a, 36b, 36c, 36d Fixing member (axial force applying part)
37a, 37b Turnbuckle Fa Pulling force Fb Axial force Ma Bending moment Mb Bending moment

Claims (4)

The door body that rotates and stands up due to the buoyancy of the infiltrated water,
An auxiliary drive unit that constantly exerts a pulling force for assisting the standing operation of the door body on both ends in the width direction of the door body in the collapsed state.
By applying an axial force in the width direction to the door body, an axial force applying portion that generates a bending moment against the bending moment generated by the action of the pulling force in the door body in the collapsed state, and an axial force applying portion.
A floating undulating gate including an axial force changing portion capable of changing the magnitude of the axial force by the axial force applying portion. In the floating undulating gate according to claim 1,
The door body is divided into a plurality of sections in the width direction thereof.
A floating undulating gate characterized in that the axial force applying portion and the axial force changing portion are paired with each other and are provided in pairs in each section. In the floating undulating gate according to claim 1 or 2.
Each of the axial force applying portions extends in the width direction of the door body and is arranged coaxially with each other, and two outer end portions are connected to the door body to apply the axial force to the door body. It is a rod member,
The axial force changing portion is a floating body characterized by being a turnbuckle in which the inner end portions of the two rod members are screwed together on both sides and the magnitude of the axial force is changed according to the amount of rotation. Ceremony undulation gate. The process of installing the door body that rotates and stands up by the buoyancy of the infiltrated water in an inverted state,
A step of applying a pulling force for assisting the standing operation of the door body to both ends in the width direction of the door body in the collapsed state, and
By applying an axial force in the width direction to the door body, a bending moment is generated against the bending moment generated by the action of the pulling force in the door body in the collapsed state, and the bending moments of both are equal to each other. A method for installing a floating undulating gate, which comprises a step of changing the magnitude of the axial force so as to be.

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