JP2011117146A - Flap gate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flap gate relieving an impact caused by opening/closing operation and securing watertightness with a door stop at an outlet end of a stream channel when an opening/closing door body is closed. <P>SOLUTION: The flap gate 1 supporting the opening/closing door body 2 installed at the outlet end c of the stream channel C, in a swingable manner to a horizontal rotating shaft 6, includes: a door stop plate 3 formed in frame shape in conformity to the peripheral edge of the outlet end c of the stream channel C, supported movably in a direction of the stream channel C while having a clearance 31 between itself and the outlet end c of the stream channel C, and abutting on the opening/closing door body 2 and pressed toward the stream channel C when the opening/closing door body 2 is closed; an impact absorbing member 4 continuously provided at least at one of the outlet end c and the door stop plate 3 to fill the clearance 31 between the door stop plate 3 and the outlet end c of the stream channel C; and an impact-absorbing watertight member 5 continuously provided at an abutting part of the opening/closing door body 2 abutting on the door stop plate 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a flap gate in which an open / close door body installed at an outlet end of a flowing water channel is swingably supported on a horizontal rotation shaft.

  Conventionally, in a flap gate in which an open / close door body installed at the outlet end of a flowing water channel is swingably supported on a horizontal rotating shaft, the open / close door body is in contact with the outlet end of the flowing water channel due to water pressure or wind pressure. There were many troubles that the door body was damaged by the impact. In response to such troubles, a flap gate has been proposed in which a member having shock absorption properties is provided to prevent damage to the open / close door body.

  For example, in Japanese Patent Application Laid-Open No. 2002-105934, a device installed in a gate body of a water channel having a drain outlet, and a support member provided on the upper part of the gate body and supported by the support member in a swingable manner. A door body that opens and closes the drain port by a water flow; a water-tight member that is provided on a side wall of the door body and that slides between the side walls of the gate body to maintain a watertight state; and is provided on an upper portion of the door body. A second watertight member that seals water between the upper wall of the gate body when the door body is closed; and a lower wall surface of the gate body provided at a lower portion of the door body when the door body is closed. A flap gate composed of a third watertight member that is watertight between the two is proposed (Patent Document 1). And it is supposed that a cushion member may be provided on the lower wall surface of the portal body so that the door body comes into contact with the cushion member before the third watertight member becomes watertight.

  According to the description of Patent Document 1, the flap gate is maintained in a watertight state even when the door body is swung by an opening / closing operation, and is closed so as to relax the door body without impact. It is said that sometimes dust can be prevented from being caught between the door body and the door stop, and the watertight device can be protected so that the opening and closing operation can be performed smoothly.

JP 2002-105934 A

  However, in the invention described in Patent Document 1, only the cushion member is provided on the lower wall surface, and when it is provided along the coast where waves are received, the water pressure received from the waves is strong and the impact is reduced. There is a problem that it cannot be alleviated sufficiently.

  Moreover, in the invention described in Patent Document 1, since the door body is provided in the upper part of the door stop, the size of the gap is different between the upper part and the lower part of the door body, and it is difficult to maintain the watertight state. There is a problem. In particular, the cushion member provided on the lower wall surface comes into contact with the door body before the door body and the door stop are parallel to each other, thereby causing a gap between the door body and the door stop. Therefore, the cushion member in the invention described in Patent Document 1 is a factor that hinders the maintenance of the watertight state.

  The present invention has been made to solve the above-described problems, and reduces the impact caused by the opening / closing operation, and watertightness between the door end of the outlet end of the water flow channel when the opening / closing door body is closed. It aims at providing the flap gate which can ensure.

  A flap gate according to the present invention is a flap gate in which an open / close door body installed at an outlet end portion of a flowing water channel is swingably supported by a horizontal rotation shaft, and is provided at a peripheral edge of the outlet end portion of the flowing water channel. In addition to being formed in a frame shape, it is supported so as to be movable in the direction of the flow channel while providing a gap with the outlet end of the flow channel, and this opening and closing is performed when the opening / closing door body is closed. The door end plate abutting against the door body and pushed in the direction of the water flow channel, and the outlet end portion or the door contact plate so as to fill a gap between the door contact plate and the outlet end portion of the water flow channel. And a shock absorbing material continuously provided on at least one of the members and a watertight member having a shock absorbing property continuously provided on a contact portion of the opening / closing door body that contacts the door stop plate.

  Further, in the present invention, the shock absorber is a flat fixed portion fixed to the outlet end portion or the door stop plate, and both ends of the fixed portion are arranged to face each other with the gap therebetween. You may have the impact-absorbing part extended in the curve shape in the contact plate side or the said exit edge part side, and was provided with the impact-absorbing property.

  ADVANTAGE OF THE INVENTION According to this invention, while mitigating the impact by opening / closing operation | movement, the watertightness with the door stop of the exit edge part of a flowing water channel at the time of a closing door body closing can be ensured.

It is a front view which shows embodiment of the flap gate which concerns on this invention. It is a longitudinal cross-sectional view which shows the A2-A2 cross section of FIG. 1 in the flap gate of this embodiment. In this embodiment, it is an expanded sectional view which shows the door stop plate of the state in which the opening-and-closing door body is closed, an impact-absorbing material, and a watertight member. In this embodiment, it is a state figure which shows the state which the flap gate discharges water to a river etc. when the water pressure by the side of a flowing water channel is higher than the water pressure by the side of a river. In this embodiment, when the water pressure on the river side or the like is higher than the water pressure on the flow channel side, the flap gate is closed and water is prevented from flowing back to the flow channel side.

  Embodiments of a flap gate according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a flap gate 1 of the present embodiment. Moreover, FIG. 2 is a front longitudinal cross-sectional view which shows the A2-A2 cross section of FIG.

  The flap gate 1 of the present embodiment is mainly composed of an opening / closing door body 2, a door stop plate 3, an impact absorbing material 4, and a watertight member 5. Hereinafter, each configuration will be described in detail.

  The open / close door body 2 automatically opens and closes by water pressure and its own weight, and is disposed at the outlet end c of the water flow channel C, and is provided horizontally above the outlet end c of the water flow channel C. The rotary shaft 6 is supported so as to be swingable. The opening / closing door body 2 in this embodiment includes a door main body 21 and a support arm 22.

  The door body 21 is formed in a substantially plate shape that is large enough to close the outlet end c of the flowing water channel C. In this embodiment, it is formed by joining steel plates in a plate shape by welding or the like, and a reinforcing beam 23 is provided so as to withstand external forces such as water pressure.

  The support arm 22 is for swingably supporting the open / close door body 2 on a horizontal rotary shaft 6 provided above the outlet end c of the water flow channel C. The support arm 22 in the present embodiment is arranged symmetrically with respect to the front central axis, extends upward from the door body 21 as shown in FIG. 2, and extends outwardly from the outlet end c of the water channel C. It is composed of a plate-shaped steel plate that is slightly bent into a substantially “<” shape. A rotary bearing 24 for supporting the horizontal rotary shaft 6 is provided in the vicinity of the bent portion of the "<" shape.

  Further, a balance weight 25 is provided at the upper end of the support arm 22 to balance the tilt angle of the door body 21 with respect to an external force caused by water pressure received by the door body 21. The balance weight 25 in the present embodiment is provided so as to balance the door body 21 in a state where the outlet end portion c is slightly opened when the door body 21 does not receive external force due to water pressure or the like.

  The horizontal rotation shaft 6 in the present embodiment is horizontally supported by a pair of shaft support members 61 extending outward from above the outlet end c of the flowing water channel C. Further, the horizontal rotation shaft 6 is disposed at a position where the surface of the door main body 21 on the side of the flow channel C can come into contact with the door stop plate 3 substantially in parallel when the door main body 21 is closed. In addition, the damper 62 which adjusts the opening / closing speed of the opening / closing door body 2 is provided in the one end part of the horizontal rotating shaft 6 in this embodiment. The damper 62 exhibits a large resistance against a fast rotational movement and a small resistance against a slow rotational movement.

  The door stop plate 3 is formed in a frame shape in accordance with the peripheral edge of the outlet end c of the flowing water channel C. Moreover, it is spaced apart so as to provide a gap 31 between the outlet end c of the flowing water channel C, and is supported so as to be movable in the direction of the flowing water channel C. When the opening / closing door body 2 is closed, It contacts the opening / closing door body 2 and is pushed in the direction of the flowing water channel C.

  As shown in FIG. 1, the door stop plate 3 in the present embodiment has a plurality of fixed piece portions 32 extending outward from a frame-shaped outer peripheral edge, and the fixed piece portion 32 has a flowing water channel. A bolt hole 33 through which a bolt B for movably supporting the outlet end c of C is provided. The bolt hole 33 is formed in a hole having a diameter larger than the diameter of the bolt to be inserted in order to allow the door stop plate 3 to move in the direction of the flowing water channel C. Further, as shown in FIG. 3, the bolt hole 33 of the fixed piece portion 32 has a cylindrical slide formed of a chemically synthetic resin such as Teflon (registered trademark) in order to improve sliding with the bolt B. A cylindrical body 34 is inserted. The gap 31 between the door stop plate 3 and the outlet end c is determined by the distance between the bolt B and the nut N.

  The above-described fixing method of the door stop plate 3 with the bolt B and the nut N is an example, and a gap 31 is provided between the door end plate 3 and the outlet end c of the flowing water channel C so as to be movable in the direction of the outlet end c. Any method can be used.

  The shock absorber 4 absorbs the impact received by the door stop plate 3 when the door 2 is opened and closed, and maintains the gap 31 between the door stop plate 3 and the outlet end c of the water channel C in a watertight state. Is to do. Therefore, the shock absorber 4 is continuously provided along the rectangular frame of the outlet end c so as to fill a gap between the door stop plate 3 and the outlet end c of the flowing water channel C.

  As shown in FIG. 3, the shock absorber 4 in the present embodiment is opposed to a flat buffer fixing portion 41 fixed to the outlet end portion c and both ends of the buffer fixing portion 41 with a gap therebetween. It is comprised by the shock-absorbing part 42 extended and formed in the curved shape at the door stop board 3 side arrange | positioned, and is formed in the longitudinal cross-section substantially "C-shape" shape as a whole. The height of the impact absorbing portion 42 extending to the door stop plate 3 side is formed larger than the gap 31 between the door stop plate 3 and the outlet end c of the flowing water channel C in order to maintain a watertight state. Then, by tightening the door stop plate 3 with bolts B and nuts N, the door stop plate 3 is brought into close contact with the shock absorbing portion 42. Further, in the present embodiment, the buffer fixing portion 41 and the shock absorbing portion 42 are integrally formed of a chemically synthetic resin such as rubber having elasticity.

  In the shock absorber 4 in the present embodiment, the buffer fixing portion 41 is fixed to the outlet end c of the water flow channel C by a bolt, an adhesive, or the like, and the shock absorber 42 is connected to the door stop plate 3 and the outlet end of the water flow channel C. The gap 31 with the part c is continuously filled. In addition, the position where the shock absorber 4 is fixed is not limited to the outlet end c of the flow channel C, and may be fixed to the door stop plate 3 side, or the outlet end c and the door. It may be fixed to both of the contact plates 3.

  The shape, material, and the like of the shock absorber 4 are not particularly limited, and are appropriately selected from those having sufficient shock absorption and water tightness.

  The watertight member 5 is provided at a contact portion of the opening / closing door body 2 that contacts the door stop plate 3. When the opening / closing door body 2 is closed, the water blocking member 3 and the door opening body 2 are watertight. While maintaining, it is for absorbing the impact at the time of contact | abutting.

  The watertight member 5 in the present embodiment includes a flat watertight fixing portion 51 fixed to a contact portion of the opening / closing door body 2 and a tube-like shape in which one end of the watertight fixing portion 51 is provided with a gap inside. It is comprised from the watertight part 52, and is formed in the longitudinal cross-section substantially "P-shape" shape as a whole. In the present embodiment, the watertight fixing portion 51 and the watertight portion 52 are integrally formed of a chemically synthetic resin such as rubber having elasticity. The watertight fixing portion 51 in the present embodiment is disposed at a position facing the shock absorber 4 with the door stop plate 3 sandwiched when the door 2 is closed.

  Next, the operation of each component of the flap gate 1 of this embodiment will be described.

  The opening / closing door body 2 mainly swings by the action of the water pressure of water discharged from the water flow channel C, the water pressure from the water discharge destination, and its own weight, and automatically opens and closes the outlet end c of the water flow channel C. . That is, as shown in FIG. 4, in normal times, the water pressure on the flowing water channel C side becomes higher than the water pressure on the water discharge side of the coast or river, and the opening / closing door body 2 swings in the opening direction. On the other hand, when the water level on the water discharge side or the river level rises, the water pressure on the flow channel C side becomes lower than the water pressure on the water discharge side as shown in FIG. To do.

  Therefore, even if the water level on the discharged side rises and water tries to flow backward to the flow channel C side, the open / close door body 2 swings in the direction of automatically closing due to the difference in water pressure, so that the flow channel C It is prevented from flowing back to the outlet end c.

  The balance weight 25 is a direction in which gravity is swung when the support arm 22 is swung together with the door main body 21 due to the difference between the water pressure on the flowing water channel C side and the water pressure on the discharged water side. Since the moment force in the same direction is exhibited, it becomes easier to swing.

  Further, the damper 62 exerts a great resistance to fast rotational movement, and therefore the swinging of the opening / closing door body 2 is suppressed against a sudden change in water pressure due to a wave or the like on the coast. The collision with the outlet end c is suppressed. In addition, since it exhibits a small resistance against a slow rotational movement, the resistance of the opening / closing door body 2 is low because the resistance is small against a change in water pressure due to a slow rise in water level such as a difference in tidal range. Performs a smooth closing operation without disturbing the swing.

  The open / close door body 2 is swung not only by the water pressure difference at the end outlet c of the flow channel C but also by the difference in wind pressure and the like.

  Next, the action of the door stop plate 3, the shock absorber 4 and the watertight member 5 when the water flow channel C is closed due to a difference in water pressure or the like will be described in more detail.

  When the flowing water channel C is closed, the open / close door body 2 is in contact with the door stop plate 3 so as to be substantially parallel to the outlet end c of the flowing water channel C. At this time, the watertight portion 52 of the watertight member 5 is in contact with the door stop plate 3 and maintains a watertight state. That is, when the watertight portion 52 receives a force in a direction in which the opening / closing door body 2 is closed, the watertight portion 52 is deformed so as to be a horizontally long gap with respect to the door stop plate 3 by an elastic force. Thereby, as the difference in water pressure or the like increases, the installation area of the watertight portion 52 and the door stop plate 3 increases, and a higher watertight state can be maintained.

  Further, the shock absorbing portion 42 of the shock absorbing material 4 in the present embodiment is formed higher than the gap 31 between the door stop plate 3 and the outlet end c, and is installed in the gap 31, so that this portion. Is still watertight.

  Furthermore, since the door stop plate 3 is supported so as to be movable in the direction of the flowing water channel C, the door stop plate 3 can be inclined within the range of the distance between the bolt B and the nut N. Therefore, it is possible to absorb a shift in contact timing between the side close to the horizontal rotation shaft 6 and the side far from the open / close door body 2. Further, even when the door 2 is somewhat loose with respect to the door stop plate 3 due to aging of the watertight member 5 or the shock absorber 4, the watertight member 5 or the shock absorber 4 is elastically deformed. It is possible to prevent the door stop plate 3 from inclining at the abutted angle to form a gap and maintain watertightness.

  Next, the action of the door stop plate 3, the shock absorbing material 4 and the watertight member 5 with respect to the shock absorption accompanying the closing of the open / close door body 2 will be described in more detail.

  The watertight part 52 of the watertight member 5 absorbs an impact when closed by an elastic force. Further, since the door stop plate 3 is supported so as to be movable in the direction of the flowing water channel C, the impact received by the door stop plate 3 is absorbed by the elastic force of the shock absorber 4. Therefore, the shock absorption is further enhanced because the shock is absorbed on both the opening / closing door body 2 side and the outlet end c side.

  Further, since the door stop plate 3 is supported so as to be movable in the direction of the flow channel C and can be tilted, the door stop plate 3 and the open / close door body 2 are affected even if they are not in a slightly parallel positional relationship at the time of collision. Accordingly, the door stop plate 3 and the watertight member 5 can be brought into close contact with each other, and the impact force can be distributed over the entire contact surface. Therefore, it is possible to prevent a part of the opening / closing door body 2 and the door stop plate 3 from being damaged or deformed.

According to the flap gate 1 of the present embodiment as described above, the following effects can be obtained.
1. Even if the open / close door body 2 may collide strongly with the outlet end c of the flowing water channel C due to waves or the like, the impact can be effectively absorbed and damage or the like can be prevented.
2. Adhesion between the opening / closing door body 2 and the outlet end c of the flowing water channel C can be enhanced.

DESCRIPTION OF SYMBOLS 1 Flap gate 2 Opening / closing door body 3 Door stop plate 4 Shock absorbing material 5 Watertight member 6 Horizontal rotating shaft 21 Door main body 22 Support arm 23 Reinforcement beam 24 Rotating bearing 25 Balance weight 31 Clearance 32 Fixed piece part 33 Bolt hole 34 Sliding cylinder Body 41 Buffering portion 42 Shock absorbing portion 51 Watertight fixing portion 52 Watertight portion 61 Shaft support member 62 Damper C Flow channel c Outlet end B Bolt N Nut

Claims (2)

It is a flap gate formed by swinging and supporting the open / close door body installed at the outlet end of the water channel on the horizontal rotation shaft,
It is formed in a frame shape according to the peripheral edge of the outlet end portion of the flowing water channel, and is supported so as to be movable in the direction of the flowing water channel while providing a gap with the outlet end portion of the flowing water channel, A door stop plate that abuts on the door when the door is closed and is pushed in the direction of the water channel;
An impact absorbing material continuously provided on at least one of the outlet end or the door stop plate so as to fill a gap between the door stop plate and the outlet end of the water channel,
A flap gate having a shock-absorbing watertight member continuously provided at a contact portion of the opening / closing door body that contacts the door stop plate.   2. The shock absorber according to claim 1, wherein the shock absorbing material is a flat fixed portion fixed to the outlet end portion or the door stop plate, and the door contact disposed opposite to the both ends of the fixed portion with the gap therebetween. A flap gate having a shock absorbing portion that extends in a curved shape on the plate side or the outlet end portion side and has shock absorbing properties.

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