JP4066860B2 - Flap gate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flap gate that is installed in a drainage channel such as a dredger pipe laid to drain water into a river or the sea and prevents water from flowing backward from the river or the sea to the drainage channel. In particular, the present invention relates to a flap gate that functions well in a situation where waves are generated on a water surface such as a river or the sea.
[0002]
[Prior art]
Conventionally, a flap gate is often used as a gate to prevent water from flowing back from a river or the sea to a drainage channel.
The flap gate is a gate where the door body swings around the horizontal support shaft, and when draining water from the drainage channel side, the door body swings in response to the flow of water to open the drainage port, and When the water surface of a river or the sea rises and water tries to flow backward to the drainage channel side, the door body swings so as to close the drainage port under the external water pressure.
As a prior art related to a flap gate, for example, a flap gate having a structure as described in the prior art of Patent Document 1 is known.
[0003]
[Patent Document 1]
JP 2002-129541 A [0004]
The conventional flap gate disclosed in Patent Document 1 is a flap gate in which a door is pivotally supported by a hinge device having a double hinge structure as shown in FIG.
Here, the reason why the flap gate as the prior art disclosed in Patent Document 1 uses the hinge device having the double hinge structure will be briefly described below.
A door body pivotally supported using a hinge device having a single hinge structure abuts against the door stop of the valve seat by rotating downward with only one hinge.
The angle at which the door body comes into contact with the door stop is determined by the angle at which the door body is rotated by the hinge, and there is no structural freedom.
Therefore, it is difficult to adjust the angle of the flap gate that pivotally supports the door using a hinge device having a single hinge structure, when the door is in contact with the door stop of the valve seat. If the door is out of the proper range, the door will not come into contact with the door at an appropriate angle, so that water will leak from between the door and the door and will not function as a gate. ing.
[0005]
In comparison, a flap gate using a hinge device having a double hinge structure has a high degree of freedom in angle when the door body comes into contact with the door by two hinges.
For this reason, the door pressed by the water pressure exhibits a behavior of abutting while adjusting the angle naturally in the direction of increasing the closeness with the door stop.
Therefore, the flap gate that pivotally supports the door using a hinge device having a double hinge structure has an excellent effect that water does not easily leak from between the door and the door stop. The prior art described in Patent Document 1 is a flap gate in which a door body is pivotally supported by a hinge device having a double hinge structure for the reason described above.
[0006]
[Problems to be solved by the invention]
However, the conventional flap gate is generally installed at the tip of the drainage channel as shown in FIG. 7, for example, and the tip of the drainage channel is usually on the sea side or river side downstream from the dike. is there. Therefore, the usage environment is greatly affected by natural conditions such as weather changes.
In particular, a flap gate that only suspends a door through a hinge device is seriously affected when waves are generated on the water surface such as the sea surface of the drainage channel.
For example, when the sea level rises, if the door body is greatly shaken by waves, the door body will not be able to keep closing the drainage port, so the drainage port is closed when the sea level rises. The original function is not fully fulfilled.
[0007]
In particular, a flap gate in which a door body is pivotally supported by a hinge device having a double hinge structure has the advantages described above in the section of the prior art, but is not a structure suitable for waves such as typhoons. FIGS. 5 (1) and 5 (2) conceptually show the behavior when the flap gate door using the hinge device having the double hinge structure and the door contact of the valve seat collide with each other. A flap gate using a hinge device having a double hinge structure, for example, as shown in FIG. 5 (1), the lower end portion of the door body partially collides with the valve seat, or as shown in FIG. 5 (2). In addition, the upper end portion of the door body partially collides with the valve seat, and there is a problem that the collided portion is easily damaged.
[0008]
In addition, even when the waves are not strong against typhoon, the door body swings in the shape shown in Fig. 6 and behaves repeatedly against the door of the valve seat. There is. In this case, there is a problem that the contact sound when the door body comes into contact with the door stop of the valve seat becomes a loud noise and disturbs the neighborhood.
[0009]
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a flap gate that functions well even in a situation where waves are generated on a water surface such as a river or the sea.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the flap gate according to the present invention is:
(1) In the flap gate that opens and closes the outlet of the water channel by a door body pivotally supported on the upper part of the water channel via a hinge device, the hinge device is fixed to the upper part of the door body, the first bearing fixed to the upper channel. A double hinge structure including a second bearing and a suspension arm, wherein the first bearing supports the upper end of the suspension arm and the second bearing supports the lower end of the suspension arm. A movement restricting device that abuts when the suspension arm swings downstream and restricts a play distance of the suspension arm, the movement restriction device comprising: a support portion fixed to the upper part of the water channel; The stopper is supported by the support portion and comes into contact with the suspension arm, and an elastic body is arranged on the contact surface of the stopper with the suspension arm.
[0011]
(2) In the flap gate described in the above (1), the distance between the suspension arms is in the range of 2 to 5 mm.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
1 to 3 relate to an embodiment of the present invention, and FIG. 1 is a cross-sectional view of an essential part for explaining the configuration of a flap gate. FIG. 2 is a view of the hinge device of the flap gate as viewed from the downstream side. 1) shows a case where a movement restricting device is arranged, and (2) shows a case where a movement restricting device is not arranged for explanation. Yes. FIG. 3 is a view showing an arrangement for explaining the entire structure of the flap gate, (1) is a view of the flap gate as viewed from the downstream side, and (2) is a view of the cross section of the flap gate as viewed from the side. is there. FIG. 6 is a layout diagram conceptually illustrating an image when the flap gate is installed in the drainage channel.
[0014]
The flap gate 1 according to the present embodiment includes a door body 20 and a hinge device 10, and the door body 20 is a rectangle formed by a vertical beam 26 and a horizontal beam 24 as shown in FIGS. The plate 22 is arranged on the frame.
The door body 20 is pivotally supported on the upper part of the water channel via the hinge device 10. When the door body 20 is lowered by its own weight, the door body 20 abuts so as to cover the drain port 50 that is the outlet of the water channel. The water flowing out from 50 can be closed.
[0015]
Further, a door stop 42 is formed on the frame as a valve seat with which the door body 20 comes into close contact with the periphery of the drain port 50. When the door body 20 descends under its own weight, the packing 29 provided around the outer periphery of the plate of the door body 20 comes into contact with the door stop 42 to seal water.
The door body 20 is pivotally supported on the upper part of the water channel via the hinge device 10 having a double hinge structure.
[0016]
Next, the structure of the hinge apparatus 10 is demonstrated using FIG.1 and FIG.2.
The hinge device 10 includes a first bearing 11 fixed to the upper part of the water channel, a second bearing 12 fixed to the upper part of the door body 20, and a suspension arm 15.
The upper ends of the first bearing 11 and the suspension arm 15 are attached to the bearing by a pin 11B, and the lower ends of the second bearing 12 and the suspension arm 15 are attached to the bearing by a pin 12B. Yes.
[0017]
In the case of this embodiment in which the hinge device 10 has a double hinge structure, the angle of the door body 20 is determined by the rotation of the suspension arm 15 by the first bearing 11 and the rotation of the suspension arm 15 by the second bearing 12. Therefore, there is a degree of freedom in the angle when the door body 20 abuts against the door stop 42.
Therefore, the door body 20 pushed by the water pressure of the water surface has a structure that can come into contact with the door stop 42 while naturally adjusting the angle in the direction of improving the water tightness.
[0018]
Next, the structure of the movement restriction device 2 will be described.
Here, FIG. 2A illustrates a case where the movement restriction device 2 is provided, and FIG. 2B illustrates a case where the movement restriction device 2 is not provided for the sake of explanation.
The movement restriction device 2 according to the present embodiment includes a stopper 5 disposed at a position where the suspension arm 15 contacts when the suspension arm 15 is rotated to a rotation angle in the downstream direction, and a support unit that supports and fixes the stopper 5 at the position. It consists of 8A and 8B.
As shown in FIG. 3, the support portions 8 </ b> A and 8 </ b> B are arranged adjacent to the bearing 11 at the upper part of the water channel so as to sandwich the first bearing 11 from both sides.
The stopper 5 is disposed so as to be bridged between the two support portions 8A and 8B, and is disposed on the downstream side of the suspension arm 15.
The stopper 5 according to the present embodiment has a two-layer structure in which a T-shaped stopper metal 5A is used as a substrate, and a buffer rubber 5B is overlapped as an elastic body for shock absorption at a portion in contact with the suspension arm.
[0019]
In the present embodiment, a two-layer structure in which the buffer rubber 5B is stacked as an elastic body for shock absorption is used. However, a structure using a spring may be used as an elastic body for shock absorption.
[0020]
Although the reason will be described later, by adjusting the position of the stopper 5, the clearance distance, which is the moving distance from the state where the suspension arm 15 rotates to the upstream limit to the contact with the stopper 5, is between 2 and 5 mm. It is preferable to do.
The definition of the play distance in the present invention is a distance in which the suspension arm 15 can move in the horizontal direction from the state where the suspension arm 15 is rotated to the limit in the upstream direction until it comes into contact with the stopper 5. With the reference position (the center position of the pins 11B and 12B in this embodiment), the intermediate point of the suspension arm 15 (intermediate position in the longitudinal direction of the suspension arm 15) located at the same position from the two reference positions moves. Distance. In the embodiment shown in FIG. 1, the play distance is 5 mm.
[0021]
Further, in the present embodiment, the support portions 8A and 8B and the stopper 5 are separately configured and combined to facilitate adjustment of the play distance between the suspension arm 15 and the movement restriction device 2, The configuration of the limiting device 2 is not limited to this, and may be the movement limiting device 2 in which the support portions 8A and 8B and the stopper 5 are integrally formed. For example, a T-shaped metal plate is formed in a gate shape. By bending, the support portions 8A and 8B and the stopper 5 may be integrated.
[0022]
The operation of the flap gate 1 according to the present embodiment described above will be described.
In the flap gate 1 in the present embodiment, when water is drained, the door body 20 swings in response to the flow of water so as to open the drain outlet 50 of the water channel.
The behavior of the hinge device 10 at this time will be described. Since the rotation of the hinge portion by the first bearing 11 is restricted by the stopper 5, the hinge portion 10 can be slightly rotated, and the swing is mainly performed by the second bearing 12. It behaves like a flap gate 1 that pivotally supports the door 20 with a single-hinge hinge device.
[0023]
Further, when the water surface of a river or the sea rises and the water tries to flow backward to the drainage channel side, the door body 20 swings so as to close the drainage port 50 in response to the flow of water.
Here, as described above, the swinging of the door body 20 is mainly governed by the rotation of the second bearing 12, and behaves as if the flap gate 1 pivotally supports the door body 20 with a single-hinge hinge device. Yes.
However, when the door body 20 approaches the outlet of the water channel, the hinge by the first bearing 11 rotates by a slight gap distance and functions as a hinge device having a double hinge structure, so that it is pushed by water pressure. The door body 20 exhibits a behavior of abutting with the door stop 42 while naturally adjusting the angle in a direction of improving water tightness.
Therefore, the flap gate 1 according to the present embodiment has the excellent operational effect of the flap gate 1 having a double hinge structure in which water does not easily leak from between the door body 20 and the door stop 42.
[0024]
Next, the case where a big wave comes by a typhoon etc. is demonstrated.
As described above, the swing of the door body 20 of the flap gate 1 shown in FIG. 1 is mainly governed by the rotation of the second bearing 12, and the flap gate 1 pivotally supports the door body 20 with a single-hinge hinge device. It behaves like Therefore, even if the door body 20 is greatly shaken, as shown in FIGS. 5 (1) and (2), the door body does not collide with the door stop 42 of the valve seat at an angle that is not assumed in normal behavior. Absent.
As a result, the conventional problem that the door body 20 of the flap gate using the hinge device having the double hinge structure is partially hit against the door stop 42 at an abrupt angle and broken can be solved.
[0025]
For the same reason, the door 20 swings and repeatedly strikes the valve seat door 42 many times in the form shown in FIG. 6 even against a strong wave such as a typhoon. Is not shown. Therefore, the conventional problem that the contact sound when the door body 20 comes into contact with the door stop 42 of the valve seat becomes a loud noise and disturbs the neighborhood can be solved.
[0026]
Here, the distance between the suspension arm 15 and the movement restriction device 2 will be described.
As is apparent from the above description, the flap gate 1 according to the present embodiment adjusts the position of the stopper 5 of the movement restriction device 2 and adjusts the play distance between the suspension arm 15 and the movement restriction device 2. The behavior of the door body 20 during swinging is controlled.
What is important is that the hinge device 10 disposed on the door body 20 needs to function effectively as a hinge of a double hinge structure only when the door body 20 abuts against the door stop 42. Thus, when the door body 20 is rotated downstream and the drain port 50 is largely opened, it is preferable that the door body 20 of the flap gate 1 behave more like a single-structure hinge. The inventors of the present application paid attention to this point, and arranged a movement restriction device 2 that contacts the suspension arm 15 and restricts the distance between the suspension arms 15 in the downstream direction of the suspension arm 15.
[0027]
For the reasons described above, the function according to the present invention is not fulfilled even when the distance between play becomes too large or too small.
However, the preferred range of the play distance depends on the shape and size of the door body of the flap gate 1 and the seal structure such as packing.
Therefore, in practice, it is easy to determine the optimal play distance by trial and error, and in actual installation, it is preferable to adjust the position of the stopper 5 so that the play distance is free from noise, For this purpose, it is preferable that the engagement position between the support portions 8A and 8B and the abutting portion 5 is adjustable so that the play distance of the flap gate 1 can be adjusted in advance.
[0028]
However, even though the optimal play distance varies depending on each flap gate, the play distance is usually limited to a range of up to approximately 10 mm. appear.
In addition, if the play distance is less than 1 mm, since it actually functions only as a single-hinge hinge device, the effect of the present invention cannot be obtained.
[0029]
Therefore, the necessary play distance for applying the present invention is generally in the range of 1 to 10 mm.
In addition, the door body 20 has a rubber packing 29 made of water-tight rubber as shown in FIG. 1 of the present embodiment, and the size of the door body 20 is about 0.5 m long × 1 m wide to 3 m long × 4 mm wide. If it is a size, a range of 2 to 5 mm is appropriate.
[0030]
【The invention's effect】
As described above, the flap gate according to the present invention uses the hinge device that pivotally supports the door body as a hinge device having a double hinge structure, and restricts movement by adjusting the distance between the slack arms suspended between the two hinges. By arranging the device, it overcomes the drawback of being weak against the waves of the conventional flap gate using a double hinge structure hinge device, and the excellent effect of the flap gate using the double hinge structure hinge device (Adjust the angle naturally in the direction to increase door contact and water tightness).
[0031]
In addition, when the distance between the play ranges from 2 to 5 mm, the above-mentioned effects can be exhibited more effectively.
Furthermore, by providing an elastic body for absorbing shocks on the surface of the stopper that comes into contact with the suspension arm, it is possible to suppress the contact noise between the suspension arm and the stopper and prevent the generation of noise.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part for explaining the configuration of a flap gate according to the present invention.
FIG. 2 is a view of a flap gate hinge device according to the present invention as viewed from the downstream side, and FIG. 2 (2) is a view when a movement restricting device is removed for explanation.
FIG. 3 is a diagram for explaining the configuration of the entire flap gate according to the present invention.
FIG. 4 is a diagram for explaining the overall configuration of a conventional flap gate.
FIG. 5 is a diagram for explaining the behavior of a conventional flap gate (during a typhoon).
FIG. 6 is a diagram for explaining the behavior of a conventional flap gate (in a wave).
FIG. 7 is a layout diagram conceptually illustrating an image when a conventional flap gate is installed in a drainage channel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flap gate 2 Movement limiter 5 Stopper 5A Stopper metal 5B Buffer rubber 10 Hinge device 11 1st bearing 11B Bearing pin 12 2nd bearing 12B Bearing pin 15 Suspension arm 20 Door body 29 Packing (watertight rubber)
30 Waterway wall 24 Horizontal girder 26 Vertical girder 42 Per door 50 Waterway 100 Embankment

Claims (2)

In the flap gate that opens and closes the outlet of the water channel by a door body pivotally supported on the upper part of the water channel via a hinge device,
The hinge device includes a first bearing fixed to the upper portion of the water channel, a second bearing fixed to the upper portion of the door body, and a suspension arm, and the upper end of the suspension arm is pivoted by the first bearing. A double hinge structure for supporting the lower end of the suspension arm by the second bearing;
A movement restricting device that abuts when the suspension arm swings downstream and restricts the play distance of the suspension arm, the movement restriction device comprising: And a stopper that contacts the suspension arm, and an elastic body is disposed on the contact surface of the stopper with the suspension arm . The flap gate according to claim 1, wherein a distance between the suspension arms is in a range of 2 to 5 mm.

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