JP6117280B2 - Floating flap gate - Google Patents

Description

  The present invention relates to a floating flap gate that is installed at, for example, an opening of a breakwater and raises a door to block the opening so that the increased water does not flow into a living space or underground space when the water increases. is there.

  There is a floating flap gate that lifts the door body using the buoyancy of the water to be introduced so that the increased water does not flow into the living space or underground space when the water rises, for example, blocking the opening of the breakwater ( For example, Patent Document 1).

  However, the floating flap gate disclosed in Patent Document 1 has a problem that when the initial inflow speed is high, the floating operation of the door body 1 is delayed and overflows into the living space or the underground space (FIG. 11 (a )reference).

  Further, when the water level is lowered, the door body 1 shows a dangerous behavior in which the door body 1 is maintained up to a water level that is about 1/3 of the door body 1 and then suddenly falls (FIG. 11). (See (b)).

  Among the above-mentioned problems, a floating flap gate has been proposed in which the other end of a rope having a counterweight attached to one end is connected to a door body via a pulley in order to prevent overflow in the initial stage of inflow (for example, Patent Documents). 2).

  The floating-type flap gate proposed in Patent Document 2 compensates for the lack of buoyancy of the floating-type flap gate with the weight of the counterweight, thereby solving the delay in the floating operation of the door body at the initial inflow.

  However, like the floating flap gate proposed in Patent Document 2, when the weight of the counterweight is always applied in a direction that assists the floating operation of the door, it is difficult to fall down when the water level is lowered.

JP 2001-214425 A JP 2003-253912 A

  The problem to be solved by the present invention is that the floating operation of the door body is always assisted in order to solve the problem of the floating flap gate that overflows into the living space and underground space due to the delay of the floating operation of the door body at the beginning of inflow. When a device is installed, it is difficult to fall down when the water level drops.

  The present invention does not delay the floating operation of the door body at the beginning of the inflow, overflows into the living space or underground space, does not become difficult to fall down even when the water level is low, and suddenly falls down It was made with the aim of avoiding any behavior.

The floating flap gate of the present invention is
Installed at the opening or the entrance, when water flows in, the distal end side of the door body has a base end side as a fulcrum in a plane in the height direction in the direction of the flowing water to block the opening or the entrance. A floating flap gate configured to be able to stand and swing,
Attaching one end of the rope to the leading end portion of the door body, the other end of the rope, attached to the counterweight or spring via at least fixed pulley inclination angle of 10 degrees with respect to the horizontal plane of the door body in the middle of the upright course or lodging 80 The counterweight is at its lowest point or the spring is at its natural length when
Until the counterweight descends to the lowest point or the spring reaches a natural length, the door body is pulled to perform standing assistance or water level tracking assistance,
Subsequently, when the counterweight rises from the lowest point, or when the spring is compressed or extended from its natural length, the counterweight or the spring acts as a resistance and the door body rises or falls. The most important feature is that the speed is reduced and the impact at the completion of standing or lodging is mitigated.

  In the above-described present invention, when the door body is erected, the door body is pulled in the erection direction by the counterweight or the spring until the inclination angle with respect to the horizontal plane becomes 10 degrees to 80 degrees, and the erection is assisted. And if the inclination | tilt angle of the door body with respect to a horizontal surface exceeds 10 to 80 degree | times, a counterweight or a spring will become resistance and the standing speed of a door body will decelerate.

  On the other hand, when the door body is lying down, the door body is pulled in the lying down direction by a counterweight or a spring until the inclination angle with respect to the horizontal plane becomes 10 degrees to 80 degrees, thereby assisting in following the lowering of the water level. And if the inclination | tilt angle of the door body with respect to a horizontal surface becomes smaller than 10 to 80 degree | times, a counterweight or a spring will become resistance and the falling speed of a door body will decelerate.

In the present invention, the setting angle of inclination with respect to the horizontal plane of the door body in the middle of the upright course or collapsed as a branch point, or a supplementary upright or lodging of the door body, standing or because the resistance of the lodging, flows initially overflow Can be prevented, and sudden lodging can be prevented before the lodging is completed. Moreover, the impact at the time of completion of standing up can be mitigated, and the followability to the water level is improved in the initial lodging.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the floating type flap gate of this invention, (a) is the figure seen from the side surface, (b) is the figure seen from the front, (c) is the figure seen from the plane. It is a figure explaining the operation | movement principle of the floating type flap gate of this invention, (a) is the initial stage of inflow, (b) is the middle stage of standing or the middle stage of lodging, (c) is the late stage of standing, (d) is the early stage of lodging, Is a diagram showing the late stage of lodging. It is the figure which showed an example of the turning force of the door body standing direction by the inclination-angle of a door body and the counterweight in the floating-type flap gate of this invention. It is the figure which looked at the schematic structure of the floating-type flap gate of this invention at the time of connecting a counterweight to a moving pulley from the side. It is the figure which looked at the schematic structure of the floating-type flap gate of this invention which used the linear compression coil spring instead of the counterweight from the side. (A) (b) is a figure explaining the operation | movement state of the linear compression coil spring with respect to the inclination angle of a door body, (a) is an inclination angle of 45 degree | times, (b) is an inclination angle of 0 degree and 90 degree | times. (C) is a figure which showed an example of the relationship between the inclination angle of the door body in the floating-type flap gate of this invention, and the turning force of the door body standing direction by a spring. It is a figure explaining the operation | movement state of the linear tension coil spring with respect to the inclination angle of a door body, (a) shows the case where an inclination angle is 45 degree | times, (b) shows the case where an inclination angle is 0 degree | times and 90 degree | times. It is a figure explaining a nonlinear combination coil spring. It is the figure which showed the other example of the relationship between the inclination angle of the door body in the floating type flap gate of this invention, and the turning force of the door body standing direction by a spring. It is explanatory drawing of the said part of the floating type flap gate of this invention which attached the rod to the both sides of a door body. It is a figure explaining the problem of the conventional floating body type flap gate, (a) is an inflow initial stage, (b) is the figure which showed the time of the water level fall.

The present invention does not overflow into the inflow initially living spaces or underground space, also lodging not is difficult even when the water level decreases, and the object of rapidly so as not to fall down, the door body in the middle or collapsed middle standing This is realized by using the set inclination angle with respect to the horizontal plane as a branch point to assist in standing or lying down of the door body, or to resist standing or lying down.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
FIG. 1 is a diagram showing a schematic configuration of a floating flap gate of the present invention.

  In FIG. 1, reference numeral 11 denotes a floating flap gate of the present invention installed on a road surface rs of an opening of a breakwater, for example. The floating-type flap gate 11 uses the water pressure of the flowing water w when the water w tries to flow into the living space or underground space from the ocean (or river), and uses the base end side 12a as a fulcrum for the door body 12. The front end side 12b is rocked upright to block the opening in a watertight state.

  The door body 12 constituting the floating flap gate 11 has a structure in which a plurality of door bodies 12 are connected in the width direction of the opening when the width of the opening to be blocked is wide. Connected by watertight rubber. Further, watertight rubber is provided on the side of the door body 12 on both sides opposite to the door stop provided at the opening of the breakwater.

  The floating flap gate 11 of the present invention shown in FIG. 1 has a function of attaching one end of a wire rope 14 and supporting a hydraulic load, for example, one rod 13 is attached to the entire width direction of the front end portion of the door body 12. doing.

  The other end of the wire rope 14 is a first fixed pulley 16 installed at a door stop 15 above the distal end of the door body 12 when lying down, and the first constant pulley 16 on the base end side of the door body 12. It is attached to the counterweight 20 via a second fixed pulley 17 installed at the same height position. Therefore, the weight of the counterweight 20 acts on the door body 12.

In the example of the present invention, the inclination angle θ of the door body 12 at the time of completion of standing is 90 degrees. Therefore, the installation position of the first fixed pulley 16 is the inclination angle θ with respect to the horizontal plane when the door body 12 swings upright. The counterweight 20 is set so as to be at the lowest point when the angle (see FIG. 3 ) becomes 45 degrees, for example. According to the investigation results of the inventors, it is known that there is no problem if the inclination angle θ is in the range of 10 degrees to 80 degrees.

  In the floating type flap gate 11 of the present invention having the above-described configuration, the functions described below are exhibited when the door body 12 stands and when the door body 12 falls.

(When the door 12 stands)
At the beginning of the inflow, the counterweight 20 is lowered, and the door body 12 is pulled in the standing direction to assist the standing (see FIG. 2A). When the inclination angle θ of the door 12 with respect to the horizontal plane becomes 45 degrees, the door 12 and the wire rope 14 are aligned (see FIG. 2B), and the counterweight 20 is at the lowest end position. When the inclination angle θ of the door body 12 with respect to the horizontal plane exceeds 45 degrees, the counterweight 20 rises due to the standing and swinging of the door body 12, so that the counterweight 20 acts as a resistance to reduce the rising speed of the door body 12. Then, the impact force at the time of completion of standing is relieved (see FIG. 2C).

(When the standing door 12 is lying down)
In the initial stage of lodging, the counterweight 20 is lowered, and the door body 12 is pulled in the falling direction and follows the drop in the water level (see FIG. 2D). When the inclination angle θ of the door 12 with respect to the horizontal plane becomes 45 degrees, the door 12 and the wire rope 14 are aligned (see FIG. 2B), and the counterweight 20 is at the lowest end position. When the inclination angle of the door body 12 with respect to the horizontal plane becomes smaller than 45 degrees, the counterweight 20 rises due to the fall of the door body 12, so that the counterweight 20 acts as a resistance to reduce the fall speed of the door body 12, and the fall is completed. The impact force at the time is relieved (see FIG. 2 (e)).

  FIG. 3 shows the relationship between the inclination angle θ of the door 12 in the floating flap gate 11 of the present invention and the turning force of the counterweight 20 in the door standing direction.

  As described above, in the floating flap gate 11 of the present invention, it is possible to assist the standing of the door 12, to reduce the impact, and to follow the water level by using a plurality of functions using the standing / falling mechanism having the counterweight 20. Become.

  In the floating flap gate 11 of the present invention, as shown in FIG. 4, a moving pulley 18 is arranged after the second fixed pulley 17, and a counterweight 20 is attached to the moving pulley 18. The end may be fixed to a fixing member 19 installed at the door stop 15 via the movable pulley 18.

  Further, the floating flap gate 11 of the present invention may be provided with a compression coil spring 22 instead of the counterweight 20 as shown in FIG. Although not shown, a tension coil spring may be attached. Note that reference numeral 23 in FIG. 5 denotes a third fixed pulley installed between the movable pulley 18 and the fixed member 19. The compression coil spring 22 or the tension coil spring may be directly connected to the other end of the wire rope 14 as shown in FIGS. 1 and 2 without the moving pulley 18 as shown in FIG.

  When the compression coil spring 22 is used, in a flap gate with the inclination angle θ of the door body 12 at the completion of standing up to 90 degrees, when the inclination angle θ of the door body 12 is 45 degrees, as shown in FIG. As shown in FIG. 6 (c), the spring is set to have a natural length so that the turning force of the spring in the door body standing direction is minimized. Then, when the inclination angle θ of the door body 12 is 0 degree and 90 degrees, the spring is compressed as shown in FIG. 6B, and the turning force in the door body standing direction by the spring as shown in FIG. 6C. Install so that is maximized.

  On the other hand, when the tension coil spring 24 is used, the inclination angle θ of the door body 12 is 45 degrees, the spring has a natural length as shown in FIG. At 0 degrees and 90 degrees, the spring is extended as shown in FIG.

  The compression coil spring 22 or the tension coil spring 24 is not limited to a linear coil spring as shown in FIGS. A spring having nonlinear characteristics such as a pitch coil spring may be used.

  Also, as shown in FIG. 8, in order from the axial center side, for example, a first compression spring 25a having a large diameter and a short length, a second compression spring 25b having a medium diameter and a medium length, and a small diameter and a long length. A combination coil spring 25 composed of a long third compression spring 25c may be used to make the tensile force non-linear.

  In the combination coil spring 25 shown in FIG. 8, when the inclination angle θ of the door body 12 is 0 degree, all the three compression springs 25a to 25c are contracted. The three compression springs 25a to 25c start to extend from the initial standing stage to the first rising stage when the inclination angle θ of the door body 12 is about 10 to 30 degrees, and when the first rising spring is reached, the first compression spring 25a is the original property. Return to.

  Next, the second compression spring 25b and the third compression spring 25c return to the normal dimension from the first standing up to the middle standing up in which the inclination angle θ of the door 12 is 45 degrees, and the three compression springs 25a to 25c are restored. Everything returns to natural length.

The third compression spring 25c, the second compression spring 25b, and the first compression spring 25a are sequentially contracted from the middle of standing until the rising of the inclination angle θ of the door body 90 is 90 degrees. The compression springs 25a to 25c are all contracted.
Note that when lying down, it is the opposite of when standing up.

  FIG. 9 shows the relationship between the turning force in the door body standing direction by the nonlinear combination coil spring 25 and the inclination angle θ of the door body 12.

  Moreover, in the example shown in FIG.1, FIG.2, FIG.4, FIG.5, although what attached the one rod 13 to the width direction whole region of the front-end | tip part of the door body 12 was shown, as shown in FIG. The rod 13 may be attached only to both sides of the door body 12.

  The present invention is not limited to the above examples, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  For example, although the wire rope 14 is used in the above embodiment, fiber ropes such as polyamide, polyester, polyethylene, polypropylene, aramid, polyarylate, and ultrahigh density polyethylene may be used. .

  1, 2, 4, and 5, the floating body type flap gate in which the door body 12 is configured by a single floating body is shown. However, the floating body connection type flap gate in which a plurality of floating bodies are connected in the height direction. You may apply to.

  Further, the moving pulley 18, the counterweight 20, and the springs 22, 24, 25 may be attached to the outside of the door stop 15, but the weight of the counterweight 20, the number of the fixed pulleys and the moving pulley 18, the springs 22, 24, Needless to say, the characteristics of 25 are optimally set according to the scale of the door 12.

  Instead of the rod 13, a suspension piece may be attached to the tip of the door body 12 and one end of the wire rope 14 may be attached to the suspension piece.

DESCRIPTION OF SYMBOLS 11 Floating type flap gate 12 Door body 13 Rod 14 Wire rope 16 1st fixed pulley 17 2nd fixed pulley 18 Moving pulley 20 Counterweight 22 Compression coil spring 24 Tension coil spring 25 Combination coil spring

Claims (2)

Installed at the opening or the entrance, when water flows in, the distal end side of the door body has a base end side as a fulcrum in a plane in the height direction in the direction of the flowing water to block the opening or the entrance. A floating flap gate configured to be able to stand and swing,
Attaching one end of the rope to the leading end portion of the door body, the other end of the rope, attached to the counterweight via at least fixed pulley, the inclination angle of 10 degrees to 80 degrees with respect to the horizontal plane of the door body in the middle of the upright course or collapsed So that the counterweight is at the lowest point,
Until the counterweight descends to the lowest point, the door body is pulled to perform standing assistance or water level tracking assistance,
Subsequently, when the counterweight rises from the lowest point, the counterweight becomes a resistance, and the rising speed or the falling speed of the door body is decelerated to reduce the impact at the completion of the rising or falling. Floating flap gate characterized by Instead of the counterweight, a spring is attached to the other end of the rope so that the spring has a natural length when the inclination angle becomes 10 degrees to 80 degrees,
Until the spring becomes a natural length, the door body is pulled to perform standing assistance or water level tracking assistance,
Subsequently, when the spring is compressed or extended from its natural length, the spring acts as a resistance, and the rising speed or the falling speed of the door body is reduced to mitigate the impact at the completion of the rising or falling. The floating flap gate according to claim 1.

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