JP3188933U - Flap gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress fluttering due to wind or the like, reduce impact due to waves or the like, reduce noise, and prevent damage to a door body or the like while maintaining a configuration which opens and closes with a light force. Is intended to provide. A flap gate 1 according to the present invention is a flap gate 1 that opens and closes a door body 4 with respect to an opening 91 in a structure 9 such as a gutter gate, and is fixed to the structure 9 to open and close the door body 4. The piston rod 62 of the cylinder damper 6 for adjusting the closing speed of the flap gate 1 is connected to the swinging portion of the flap gate 1. [Selection diagram] Fig. 2

Description

  The present invention relates to a flap gate that opens and closes an opening of a structure, and more particularly to a flap gate that is suitable for opening and closing a lock gate, a sluice gate, and the like.

  Conventionally, sluice gates and sluice gates have been provided with flap gates to prevent river tides and river backflow.

  As such a flap gate, for example, in Japanese Patent Laid-Open No. 11-181748 (Patent Document 1), left and right bells are mounted on a horizontal axis provided at the top of a machine frame or the like that requires an outlet at the end of a water channel. The crank-shaped swing link is rotatably supported, and the top portion of the door body that opens and closes the outlet of the water channel is pivotally attached to the end of the bell crank-shaped swing link. A balance weight that balances with the door body around the horizontal axis is provided at the end of the rising arm part, and a high bracket is provided in the central part of the machine frame, etc. that forms the outlet of the water flow channel. The other end of the swing link pivotally attached to one end is pivotally attached to the top of the connecting piece that extends from the top of the door to the bracket and is substantially flush with the bracket in the closed state of the outlet at the end of the water flow channel. An automatic hula characterized by Pugeto have been disclosed. According to this automatic flap gate, it is said that it can be opened properly at normal water level without installing a motor, etc., and can be automatically closed by river water pressure etc. when the river water level rises abnormally. Yes.

JP-A-11-181748

  However, the conventional flap gate including the automatic flap gate described in Patent Document 1 is stationary when the rotational moment of the center of gravity of the weight is balanced by the balance weight, and the door body is opened and closed with a light force. . For this reason, it is easy to swing and flutter even with a weak external force such as wind, and in a place with waves such as the coast, it is easily affected by waves, so the door body strongly hits the door stop such as a lock. May generate noise and damage the door body and locks.

  The present invention has been made to solve such problems, and while maintaining a structure that opens and closes with a light force, it suppresses flutter due to wind, etc., mitigates shock caused by waves, etc., and reduces noise. The purpose of the present invention is to provide a flap gate that can reduce damage to the door body and the like.

  A flap gate according to the present invention is a flap gate that opens and closes a door body with respect to an opening in a structure such as a lock gate, and is a piston rod of a cylinder damper that is fixed to the structure and adjusts a closing speed of the door body. Is connected to the swinging portion of the flap gate.

  Moreover, as one aspect of the present invention, a cylinder arm to which a piston rod of a cylinder damper is attached is fixed to one end portion of the rotation shaft of the flap gate, and the cylinder arm and the piston rod are rotatably connected. The base end portion of the cylinder damper may be coupled so as to be swingable around a trunnion shaft provided in the structure.

  Furthermore, as one aspect of the present invention, the cylinder damper is an oil damper, and has an aperture valve that obstructs the flow of oil that moves according to the operation of closing the door body, and oil that moves according to the operation of opening the door body. There may be a check valve that does not impede the flow of the air.

  According to the present invention, while maintaining a configuration that opens and closes with light force, it is possible to suppress flutter caused by wind, etc., reduce shock caused by waves, etc., reduce noise, and prevent damage to door bodies and the like. it can.

It is a front view which shows embodiment of the flap gate which concerns on this invention. It is a side view of the flap gate in this embodiment. It is a top view of the cylinder damper in this embodiment. In this embodiment, it is side surface sectional drawing of a cylinder damper when a door body closes. In this embodiment, it is a side sectional view of a cylinder damper when a door is opened.

  Hereinafter, an embodiment of a flap gate 1 according to the present invention will be described with reference to the drawings. In addition, the flap gate which concerns on this invention is applicable to all the structures 9 which have the opening part 91 which needs opening and closing of a waterway like a lock gate, a sluice gate, and a valve, disaster prevention equipment.

  The flap gate 1 according to the present embodiment is a flap gate 1 that opens and closes the door body 4 with respect to the opening 91 in the structure 9 such as a lock gate. As shown in FIG. 1 and FIG. A rotary shaft 2 rotatably supported by bearings 71 71 installed on an upper part of a structure 9 such as a gate, and a pair of swing arms 3 fixed to the rotary shaft 2 and swingably supported. 3, a door body 4 that can close the opening 91 of the structure 9, a balance weight 5 that adjusts the opening / closing balance of the door body 4, and a speed at which the door body 4 is closed by being fixed to the structure 9. It is comprised from the cylinder damper 6 to adjust. Hereinafter, the configuration according to the present embodiment will be described in detail.

  As shown in FIGS. 1 and 2, the rotary shaft 2 according to the present embodiment is for supporting the door body 4 so as to be swingable via swinging arms 3 and 3, and is made of a cylindrical member. . The rotating shaft 2 is rotatably supported by a pair of bearings 71, 71 installed on the upper portion of the structure 9 while being kept substantially horizontal. As shown in FIG. 1, the pair of bearings 71, 71 supports the rotary shaft 2 at two locations near both ends thereof, and is fixed to the structure 9 via the bearing fixture 72 to rotate. The shaft 2 is attached to the structure 9. In the present embodiment, since a cylinder damper 6 to be described later is attached to one end portion of the rotating shaft 2, the rotating shaft 2 is configured to extend outward from one bearing 71 as shown in FIG. Has been.

  Further, as shown in FIGS. 1 and 2, the pair of swing arms 3 and 3 according to the present embodiment are formed symmetrically, and rotate so that the rotary shaft 2 penetrates through a substantially intermediate portion. It is stably fixed to the shaft 2. In this way, the swing arms 3 and 3 are supported by the rotary shaft 2 so as to be swingable. A door body 4 is attached to the lower end of each swing arm 3, 3, and a balance weight 5 is attached to the upper end.

  As shown in FIGS. 1 and 2, the door body 4 according to the present embodiment is formed in a size capable of closing the opening 91 of the structure 9, and has a predetermined size with respect to the swing arms 3 and 3. It is fixed in an angled state. Moreover, the float 41 for controlling the buoyancy of the door body 4 is attached to the back surface of the door body 4, and when the water level on the outside water side rises, a large buoyancy works and the door body 4 is quickly moved. It is configured to be able to stop water by swinging in the closing direction.

  In this embodiment, the door body 4 and the swing arms 3 and 3 are formed as separate bodies and are integrally fixed by bolts, but these fixing methods are appropriately selected, such as welding. Or may be integrally formed by casting or forging.

  Moreover, the fixing method of the rotating shaft 2 and the swing arms 3 and 3 is also selected as appropriate, and may be fixed by welding or the like.

  Next, the balance weight 5 in the present embodiment is for adjusting the opening / closing balance of the door body 4 and straddles the upper ends of the pair of swing arms 3, 3 as shown in FIGS. 1 and 2. It is attached. Here, the door body 4 is stationary at a balance between the rotational moment in the opening direction of the center of gravity of the door body 4 and the rotational moment in the closing direction of the center of gravity of the balance weight 5. The balance weight 5 helps the rotational moment in the opening direction of the door body 4, and opens the opening 91 by a slight hydraulic load due to the difference in water level between the inside and outside of the door body 4. Further, when the water level on the outside water side rises, the buoyancy moment of the float 41 works in the closing direction, so that the opening 91 is fully closed.

  Further, the cylinder damper 6 in the present embodiment is an oil damper for adjusting the closing speed of the door body 4 and is attached to the structure 9 by a cylinder fixing member 81 as shown in FIGS. ing. The cylinder damper 6 mainly includes an oil 61, a piston rod 62, a cylinder 63, an oil flow path 64, and a flow rate adjustment valve 65.

  Here, the cylinder damper 6 in the present embodiment includes a throttle valve 65a and a check valve 65b as the flow rate adjusting valve 65, as shown in FIGS. As shown in FIG. 4, the throttle valve 65 a functions as a valve that inhibits the flow of the oil 61 that moves according to the operation of closing the door body 4 by applying an inflow resistance to the oil 61 that flows in the oil flow path 64. Further, as shown in FIG. 5, the check valve 65 b is a valve that hardly gives inflow resistance to the oil 61 that flows in the oil flow path 64 and has a backflow prevention function, so that the oil that moves according to the opening operation of the door body 4 is performed. It functions as a valve that does not obstruct the flow of 61. For this reason, the flow rate adjusting valve 65 has a structure in which the door body 4 is slowly swung in the closing direction and the swinging speed in the opening direction is not hindered.

  On the other hand, a cylinder arm 82 for attaching a piston rod 62 of the cylinder damper 6 is fixed to one end portion of the rotary shaft 2 of the flap gate 1 as shown in FIGS. The cylinder arm 82 and the piston rod 62 are rotatably connected. Further, the base end portion of the cylinder 63 in the cylinder damper 6 is swingably connected around a trunnion shaft 81a provided in the structure 9, as shown in FIGS. Therefore, in use, the swing of the door body 4 is transmitted to the rotary shaft 2 via the swing arms 3 and 3, and the piston rod 62 expands and contracts by rotating the cylinder arm 82 together with the rotary shaft 2. It is configured.

  In the present embodiment, the piston rod 62 of the cylinder damper 6 is connected to one end of the rotating shaft 2, but the connecting portion is not limited to the rotating shaft 2. As long as the cylinder damper 6 can alleviate the impact when the door body 4 is closed, the flap gate 1 may be connected to the swing arms 3, 3, the door body 4, etc. Can be changed.

  Next, the operation of the flap gate 1 according to the present embodiment will be described.

  In normal times when the water level on the outside water side is standard, as shown in FIG. 2, the rotational moment in the opening direction of the center of gravity of the door body 4 and the like and the rotational moment in the closing direction of the center of gravity of the balance weight 5 are balanced. The balance is maintained with the opening 91 of the structure 9 such as Xiamen slightly opened, and is stationary. For this reason, at a slight water depth where no water pressure is generated, the waste water is discharged from the gap between the door body 4 and the opening 91 toward the outside water.

  Further, when the amount of drainage from the inside water side to the outside water side increases, the hydraulic load due to the water level difference between the inside and outside of the door body 4 is slight due to the buoyancy of the door body 4 and the float 41 and the rotational moment in the opening direction due to the balance weight 5. Even if it exists, the door body 4 opens automatically and a large amount of water is discharged.

  On the other hand, when the water level on the outside water side increases, the door body 4 is automatically operated even if there is no difference between the water level inside and outside the door body 4 due to the buoyancy of the door body 4 and the float 41 and the rotational moment in the closing direction due to the balance weight 5. Thus, the opening 91 is closed to prevent the water on the outside water side from flowing back into the water channel.

  Further, when the door body 4 is about to swing rapidly in the closing direction due to the impact of wind or waves, a force is applied to rotate the rotary shaft 2 via the swing arms 3 and 3. For this reason, the cylinder arm 82 attached to one end of the rotating shaft 2 pulls the piston rod 62 of the cylinder damper 6 rapidly. At this time, as shown in FIG. 4, the oil 61 inside the cylinder 63 flows in the oil flow path 64 in the same direction as the movement of the piston rod 62 (the arrow direction in FIG. 4) due to the extension of the piston rod 62. Then, it passes through the throttle valve 65a and absorbs the impact by its resistance. As described above, the flap gate 1 according to the present embodiment includes the cylinder damper 6 so as to adjust the closing speed of the door body 4 even when subjected to the impact of wind or waves and suppress rapid swinging. For this reason, the fluttering of the door body 4 is suppressed, and the noise caused by the collision between the door body 4 and the opening 91 is reduced.

  On the other hand, even when the door body 4 suddenly swings in the opening direction due to the impact of the wind coming from the inside water side to the outside water side, the rotating shaft 2 is rotated through the swing arms 3 and 3. The power to try works. For this reason, the cylinder arm 82 attached to one end of the rotating shaft 2 abruptly contracts the piston rod 62 of the cylinder damper 6. At this time, as shown in FIG. 5, the oil 61 inside the cylinder 63 flows in the oil flow path 64 in the same direction as the movement of the piston rod 62 (the arrow direction in FIG. 5) as the piston rod 62 contracts. Therefore, the resistance is small because it passes through the check valve 65b. For this reason, the door body 4 opens greatly due to the impact of wind from the inside water side, but when closed by the reaction, resistance is generated by the cylinder damper 6 and the impact is absorbed as described above. There is no worry of being strongly struck against the structure 9. In this way, it is possible to prevent the generation of impact sound and damage to the door body 4 and the structure 9 due to the door body 4 being hit against the structure 9.

The flap gate 1 of the present embodiment as described above has the following effects.
1. Fluttering due to wind or the like can be suppressed, impact caused by waves or the like can be reduced, noise can be reduced, and damage to the door body 4 and the structure 9 can be prevented.
2. While maintaining the characteristic of the conventional flap gate that opens and closes with a light force, the door body 4 can be prevented from fluttering and impacting.

  In addition, the flap gate 1 which concerns on this invention is not limited to this embodiment, It can change suitably.

  For example, the cylinder damper 6 may be attached to either one end of the rotating shaft 2 or may be attached to both ends.

  The cylinder damper 6 is not limited to the oil type, and may be a material using a material that generates a damping force when deformed, such as a gas type or rubber.

1 Flap gate 2 Rotating shaft 3 Swing arm 4 Door body 41 Float 5 Balance weight 6 Cylinder damper 61 Oil 62 Piston rod 63 Cylinder 64 Oil flow path 65 Flow rate adjusting valve 65a Throttle valve 65b Check valve 71 Bearing 72 Bearing fixture 81 Cylinder Fixing tool 81a Trunnion shaft 82 Cylinder arm 9 Structure 91 Opening

Claims (3)

A flap gate that opens and closes a door body with respect to an opening in a structure such as Xiamen,
A flap gate, wherein a piston rod of a cylinder damper that is fixed to the structure and adjusts a closing speed of the door body is connected to a swinging portion of the flap gate.   A cylinder arm to which the piston rod of the cylinder damper is attached is fixed to one end of the rotation shaft of the flap gate, and the cylinder arm and the piston rod are rotatably connected to each other. 2. The flap gate according to claim 1, wherein the end portion is swingably connected around a trunnion shaft provided in the structure.   The cylinder damper is an oil damper and has a throttle valve that obstructs the flow of oil that moves according to the operation of closing the door body, and the check that does not obstruct the flow of oil that moves according to the operation of opening the door body The flap gate according to claim 1 or 2 which has a valve.

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