JP2004285672A - Flap gate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flap gate, functioned favorably even in the situation where waves are generated on the surface of water in a river or in the sea. <P>SOLUTION: In this flap gate, a door body is installed between two bearings using a hinge device of a double-hinge structure through a hanging arm. A movement limit device is disposed on the downstream side of the hanging arm, thereby limiting the movable distance when the hanging arm is rocked to the downstream side. When the movable distance of the hanging arm is limited, the behavior of the door body is limited, thereby overcoming the disadvantage of the conventional flap gate using the hinge device of a double-hinge structure that it is weak to waves. Accordingly, this flap gate is provided with an excellent effect of the double-hinge structure. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flap gate that is installed in a drainage channel such as a gutter pipe laid to drain water into a river or the sea, and that 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 backward from a river or the sea to a drainage channel.
The flap gate is a gate in which the door swings around the horizontal support shaft.When draining water from the drain channel side, the door swings by opening the drain port in response to the flow of water. When the water surface of a river, sea, or the like rises and water flows backward to the drainage channel side, the door body swings so as to close the drainage port due to external water pressure.
As a prior art related to a flap gate, for example, a flap gate having a structure described in the related art of Patent Document 1 is known.
[0003]
[Patent Document 1]
JP-A-2002-129541
The conventional flap gate disclosed in Patent Literature 1 is a flap gate in which a door body is pivotally supported by a hinge device having a double hinge structure as shown in FIG.
Here, the reason why the conventional flap gate disclosed in Patent Document 1 uses a hinge device having a double hinge structure will be briefly described below.
A door that is pivotally supported using a hinge device having a single hinge structure is rotated downward by a hinge having only one location, thereby abutting against a door stop of a valve seat.
The angle at which the door abuts against the door stop is determined by the angle at which the door is rotated by the hinge, and there is no structural freedom.
Therefore, it is difficult to adjust the angle at which the door abuts against the door stop of the valve seat in the flap gate that pivotally supports the door using a hinge device having a single hinge structure. If the door deviates from the proper range, the door body will not contact the door stop at an appropriate angle, so that there is a problem that water leaks from between the door body and the door stop, and the gate does not function. ing.
[0005]
In comparison, the flap gate using the hinge device having the double hinge structure has a higher degree of freedom in the angle at which the door abuts against the door stop due to the two hinges.
For this reason, the door pressed by the water pressure has a behavior in which it comes into contact with the door while naturally adjusting the angle in the direction of increasing the closeness to the door stop.
Therefore, the flap gate which uses the hinge device of the double hinge structure to pivotally support the door has an excellent effect of preventing water from leaking between the door and the door stop. The prior art described in Patent Literature 1 is a flap gate in which a door 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 located on the sea side or river side downstream of the embankment. is there. Therefore, the usage environment is greatly affected by natural conditions such as weather change.
In particular, a flap gate in which a door is simply suspended via a hinge device has a significant effect when a wave is generated on the water surface such as the sea surface at the drainage destination.
For example, when the sea surface rises, if the door body is greatly shaken by the waves, the door body will not be able to keep the drain port closed, so the drain port will be closed when the sea level rises It cannot fulfill its original function sufficiently.
[0007]
In particular, a flap gate in which a door 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. The behavior when the door of the flap gate and the door stop of the valve seat collide with a wave using a hinge device having a double hinge structure is conceptually shown in FIGS. 5A and 5B. In a flap gate using a hinge device having a double hinge structure, for example, as shown in FIG. 5A, the lower end of a door body partially collides with a valve seat, or as shown in FIG. In this case, the upper end of the door body partially collides with the valve seat, and there is a problem that the colliding portion is easily damaged.
[0008]
In addition, even in the case of a wave that is not as strong as a typhoon, the door body swings in the form shown in FIG. 6 and behaves repeatedly and repeatedly against the door stop of the valve seat. There is. In this case, there is a problem that the contact sound when the door comes into contact with the door stop of the valve seat becomes loud noise and disturbs the neighbors.
[0009]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a flap gate that functions well even in a situation where waves occur on a water surface such as a river or the sea.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, a flap gate according to the present invention
(1) In a flap gate that opens and closes an outlet of a waterway by a door body that is pivotally supported on an upper part of a waterway via a hinge device, the hinge device is mounted on a first bearing fixed on the upper part of the waterway and above the door body. 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. In addition, a movement restricting device is provided which comes into contact with the suspension arm when the suspension arm swings to the downstream side to limit the play distance of the suspension arm.
[0011]
(2) In the flap gate according to the above (1), a play distance of the suspension arm is in a range of 2 to 5 mm.
[0012]
(3) In the flap gate according to the above (1) or (2), the movement restriction device includes a support portion fixed on an upper part of the water channel, and a stopper supported by the support portion and abutting on the suspension arm, An elastic body is arranged on the contact surface of the stopper with the suspension arm.
[0013]
BEST MODE FOR CARRYING OUT 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 a main part illustrating a 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) illustrates a case where a movement restricting device is arranged, and (2) illustrates a case where no movement restricting device is arranged for explanation. I have. FIG. 3 is a view showing the arrangement for explaining the entire configuration of the flap gate, (1) is a view of the flap gate viewed from the downstream side, and (2) is a view of a cross section of the flap gate 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 has a rectangular shape formed by a vertical girder 26 and a horizontal girder 24 as shown in FIGS. The plate 22 is formed on the frame of the above.
The door body 20 is pivotally supported on the upper part of the water channel via the hinge device 10, and when the door body 20 descends under its own weight, it comes into contact with the water body so as to cover the drain port 50 which is the outlet of the water channel. The structure is such that the water flowing out from 50 can be closed.
[0015]
A door stop 42 is formed on the frame around the drain port 50 as a valve seat with which the door body 20 comes into close contact. When the door body 20 descends by its own weight, the packing 29 provided on the outer peripheral edge of the plate of the door body 20 comes into contact with the door stop 42 to seal water.
Note that the door body 20 is pivotally supported at the upper part of the water channel via the hinge device 10 having a double hinge structure.
[0016]
Next, the structure of the hinge device 10 will be described with reference to FIGS.
The hinge device 10 includes a first bearing 11 fixed on an upper part of a water channel, a second bearing 12 fixed on an upper part of a door body 20, and a suspension arm 15.
The upper ends of the first bearing 11 and the suspension arm 15 are mounted on the bearing by pins 11B, and the lower ends of the second bearing 12 and the suspension arm 15 are mounted on the bearing by pins 12B. I have.
[0017]
In the case of the present 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 at which the door body 20 contacts the door stop 42.
Therefore, the door body 20 pressed by the water pressure of the water surface has a structure capable of coming into contact with the door stop 42 while naturally adjusting the angle in the direction of increasing the water tightness.
[0018]
Next, the structure of the movement restriction device 2 will be described.
Here, FIG. 2 (1) illustrates a case where the movement restriction device 2 is provided, and FIG. 2 (2) illustrates a case where the movement restriction device 2 is not provided for description.
The movement restricting device 2 according to the present embodiment includes a stopper 5 disposed at a position where the suspension arm 15 comes into contact when the suspension arm 15 rotates to a certain rotation angle in the downstream direction, and a support portion that supports and fixes the stopper 5 at the position. 8A and 8B.
As shown in FIG. 3, the support portions 8A and 8B 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 arranged so as to bridge between the two support portions 8A and 8B, and is arranged downstream 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 as an elastic body for absorbing shock is superimposed on a portion in contact with the suspension arm.
[0019]
In the present embodiment, a two-layer structure in which the cushioning rubber 5B is stacked as an elastic body for absorbing shock is used, but a structure using a spring as the elastic body for absorbing shock may be used.
[0020]
Although the reason will be described later, by adjusting the position of the stopper 5, the idle distance, which is the moving distance from the state where the suspension arm 15 is rotated to the limit on the upstream side until it comes into contact with the stopper 5, is 2 to 5 mm. Is preferred.
The definition of the play distance in the present invention is the distance that the suspension arm 15 can move in the horizontal direction from the state where it is rotated to the limit on the upstream side to the time when it comes into contact with the stopper 5. With the (center position of the axes of the pins 11B and 12B in this embodiment) as the reference position, the middle point of the suspension arm 15 (the middle position in the longitudinal direction of the suspension arm 15) 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]
In the present embodiment, the support portions 8A and 8B and the stopper 5 are separately configured and combined in order to facilitate adjustment of the play distance between the suspension arm 15 and the movement restricting device 2. The configuration of the restriction device 2 is not limited to this, and may be the movement restriction device 2 in which the support portions 8A and 8B and the stopper 5 are integrally configured. For example, a T-shaped metal plate may be formed into a gate shape. By bending, the support portions 8A and 8B and the stopper 5 may be configured integrally.
[0022]
The operation of the flap gate 1 according to the embodiment described above will be described.
In the flap gate 1 in the present embodiment, when draining water, the door body 20 swings so as to open the drain port 50 of the water channel in response to the flow of water.
To explain the behavior of the hinge device 10 at this time, the hinge portion of the first bearing 11 can be rotated only a little because the rotation is restricted by the stopper 5, and the swing is mainly caused by the second bearing 12 And behaves as if the flap gate 1 pivotally supports the door body 20 with a single hinge hinge device.
[0023]
Further, when the water surface such as a river or the sea rises and water tries to flow backward to the drainage channel side, the door body 20 swings so as to close the drainage port 50 by receiving the flow of water.
Here, as described above, the swing of the door body 20 is mainly controlled 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. I have.
However, when the door body 20 approached the waterway outlet, the hinge by the first bearing 11 was rotated by a small play distance to function as a double hinge structure hinge device, and was pressed by water pressure. The door body 20 behaves in such a manner that it comes into contact with the door stop 42 while naturally adjusting its angle in the direction of increasing water tightness.
Therefore, the flap gate 1 according to the present embodiment has the excellent operation and effect of the flap gate 1 having the double hinge structure, in which water hardly leaks from between the door body 20 and the door stop 42.
[0024]
Next, a case where a large wave is caused by a typhoon or the like will be described.
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 as if the flap gate 1 supported the door body 20 by a single hinge hinge device. It behaves like Therefore, even if the door body 20 is largely shaken, it is possible that the door body collides with the door stop 42 of the valve seat at an angle that is not assumed in a normal behavior as shown in FIGS. 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 at a steep angle against the door stop 42 and is broken can be solved.
[0025]
Further, for the same reason, the door 20 swings and is repeatedly hit against the door stop 42 of the valve seat many times in the form shown in FIG. Never show. 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 loud noise and disturbs the neighborhood can be solved.
[0026]
Here, the play distance between the suspension arm 15 and the movement restriction device 2 will be described.
As is clear from the above description, the flap gate 1 according to the present embodiment adjusts the position of the stopper 5 of the movement restricting device 2 to adjust the play distance between the suspension arm 15 and the movement restricting device 2. The behavior of the door 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 having a double hinge structure only when the door body 20 contacts the door stop 42. In the case where the door body 20 is rotated to the downstream side and the drain port 50 is largely opened, it is more preferable that the behavior of the door body 20 of the flap gate 1 behave like a hinge having a single structure. Paying attention to this point, the inventors of the present application arranged the movement restricting device 2 that abuts on the suspension arm 15 and restricts the play distance of the suspension arm 15 in the downstream direction of the suspension arm 15.
[0027]
For the reasons described above, the function in the present invention is not performed if the play distance is too large or too small.
However, the preferable range of the play distance depends on the shape and size of the door of the flap gate 1 and the seal structure such as packing in principle, and the optimum play distance varies depending on each flap gate 1.
Therefore, in practice, it is easy to obtain the optimum 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 does not cause noise or the like. For this purpose, it is preferable that the engagement position between the support portions 8A and 8B and the contact portion 5 can be adjusted so that the play distance of the flap gate 1 can be adjusted in advance.
[0028]
However, even if the optimum play distance varies depending on each flap gate, the play distance is generally limited to a range of generally up to about 10 mm. If the play distance is longer, the behavior shown in FIG. appear.
In addition, if the play distance is less than 1 mm, it actually functions only as a single hinge hinge device, so that the effect of the present invention cannot be obtained.
[0029]
Therefore, the play distance required to apply the present invention is generally in the range of 1 to 10 mm.
Further, the door 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 20 is about 0.5 m × 1 m to 3 m × 4 mm. If it is large, a range of 2 to 5 mm is appropriate.
[0030]
【The invention's effect】
As described above, in the flap gate according to the present invention, the hinge device for pivotally supporting the door body is a hinge device having a double hinge structure, and the movement is limited by adjusting the play distance of the suspension arm suspended between the two hinges. By disposing the device, it is possible to overcome the disadvantage that the conventional flap gate using the hinge device having the double hinge structure is vulnerable to waves, and to achieve the excellent operational effects of the flap gate using the hinge device having the double hinge structure. (Adjust the angle naturally in the direction to increase the door stop and water tightness).
[0031]
Further, by setting the play distance in the range of 2 to 5 mm, the above-mentioned function and effect can be exhibited more effectively.
Furthermore, by disposing an elastic body for absorbing shock on the surface of the stopper that comes into contact with the suspension arm, it is possible to suppress the contact sound between the suspension arm and the stopper and prevent noise.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part illustrating a configuration of a flap gate according to the present invention.
FIG. 2 is a view of a hinge device for a flap gate according to the present invention as viewed from a downstream side, and FIG. 2 (2) is a diagram when a movement restriction 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 configuration of the entire conventional flap gate.
FIG. 5 is a diagram illustrating the behavior of a conventional flap gate (during a typhoon).
FIG. 6 is a view for explaining the behavior of a conventional flap gate (during 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 restriction device 5 Stopper 5A Stopper hardware 5B Buffer rubber 10 Hinge device 11 First bearing 11B Bearing pin 12 Second bearing 12B Bearing pin 15 Hanging arm 20 Door body 29 Packing (watertight rubber)
30 waterway wall 24 horizontal girder 26 vertical girder 42 per unit 50 waterway 100 embankment

Claims (3)

In a flap gate which opens and closes an outlet of a waterway by a door body pivotally supported on an upper part of a waterway via a hinge device, the hinge device has a first bearing fixed on the upper part of the waterway and a second bearing fixed on an upper part of the door body. A double hinge structure comprising a 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 flap gate, comprising a movement restricting device that abuts when the suspension arm swings downstream to limit a play distance of the suspension arm. The flap gate according to claim 1, wherein a play distance of the suspension arm is in a range of 2 to 5 mm. The movement restricting device comprises a support portion fixedly provided at an upper part of a water channel, and a stopper supported by the support portion and abutting on a suspension arm, and an elastic body is disposed on a contact surface of the stopper with the suspension arm. The flap gate according to claim 1 or 2.

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