JP6676293B2 - Flap gate - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a flap gate provided at a drain of a sluice that drains water from a water channel to a river or the like.

  In such a flap gate, a door body is swingably mounted by a hinge mechanism at a drain of a water channel opened at a position slightly higher than a normal water level of a river or the like. When draining water from the water channel at the time of (1), the door is opened by the drain pressure and the water is drained from the water channel. When the water level rises due to flooding of a river or the like and the water level rises, the door pressure is pressed against the drain port by the water pressure to close the drain port, thereby preventing the water of the river or the like from flowing back into the water channel.

  Here, the above-mentioned door body is generally swingably supported via a hinge mechanism fixed to an upper part of a drain port. However, Patent Document 1 discloses such a door body as a sliding shaft. The sliding shaft is guided vertically through an operating member such as a threaded rod so as to be able to move up and down on a gate-shaped frame having a guide groove. There has been proposed a flap gate that removes an obstacle by pulling up a door together with a sliding shaft by an operation member when an accident that cannot be closed occurs.

Japanese Utility Model Publication No. 48-000908

  However, in the flap gate described in Patent Document 1, the door is supported by the sliding shaft via the hinge mechanism having the link arm as described above, and the sliding shaft is provided with guide members at both ends thereof. Are merely accommodated and guided in the U-shaped guide groove of the portal frame. For this reason, if the sliding shaft is pushed together with the door body against the river side or the water channel side due to excessive drainage pressure or water pressure of a river or the like, the sliding shaft may be deformed. Also, if the door vibrates greatly due to an earthquake or the like, the sliding shaft may be tilted in the portal frame, and when the sliding shaft is tilted, the guide body falls out of the guide groove and slides. In addition, the door body may come off from the portal frame.

  The present invention has been made under such a background, and enables the door to move up and down similarly to Patent Document 1, but does not cause deformation or the like even when an excessive pressure acts, and An object of the present invention is to provide a flap gate capable of performing stable drainage without being inclined and dislodged in a shaped frame.

In order to solve the above problems and achieve such an object, the present invention relates to a flap gate that opens and closes a drainage port of a water channel with a swingable door body, wherein the door body has a cross section. A rectangular frame is formed by a square member having a U-shape, and a square member having a U-shaped cross section is attached to a central portion in the vertical direction in a horizontal direction, and the above-mentioned water channel of the door body thus formed in a frame shape. A frame-shaped door which is configured so that a skin plate is attached to the entire surface facing the upstream side and the inside of the frame is covered, and which is vertically movably attached to a gate-shaped frame provided on both sides of the drain port. The member is swingably supported via a hinge mechanism, and the door contact member is formed in a rectangular frame shape. The upper side and both side portions of the rectangular frame are rectangular cylinders having a rectangular cross section. And the lower side of the rectangular frame It is characterized by being formed by a horizontal plate which connects the lower end of the both side portions.

  In the flap gate configured as described above, the frame-shaped door contact member is located at the opening of the drain port during normal use, and when draining from the drain port to a river or the like, the inside of the frame of the door contact member is used. Through the drainage, the door body swingably supported by the door contact member via the hinge mechanism opens to the river side by the drainage pressure and drains. Also, when the water level rises due to the rise of water in a river or the like, the water pressure presses the door body against the door member and the door member is pressed against the periphery of the opening of the drain port, whereby the drain port is closed and the river is closed. To prevent water from flowing back into the waterway.

  Further, in the flap gate having the above-described configuration, the door contact member is frame-shaped as described above, so that the door contact member is supported by a single sliding shaft as in the flap gate described in Patent Document 1. The strength and the rigidity of the door are high, and no deformation occurs even when an excessive pressure is applied during drainage or when increasing water in a river or the like. Further, since such a frame-shaped door contact member does not tilt in the portal frame, it does not come off from the portal frame. For this reason, according to the flap gate configured as described above, it is possible to perform stable drainage over a long period of time.

  Of course, when an obstacle is caught between the door member and the door member, the door member together with the door member can be easily lifted and removed similarly to the flap gate described in Patent Document 1. In addition, a sliding gate (slide gate or sluice gate) that opens and closes a drain port by attaching a door that is not swingable to a gate-shaped frame and moving it up and down, and a flap that allows the door to swing as described above Even in the case of replacing with a gate, it is only necessary to remove the sliding gate door body and attach the door contact member with the swingable door body of the flap gate configured as above, without requiring civil engineering work etc. The existing sliding gate can be easily replaced with the flap gate in a short time.

  Furthermore, by interposing a watertight rubber between the door member and the door body and between the door member and the periphery of the opening of the drain port, the watertight rubber is used when the water of a river or the like is increased. Since the drain outlet can be heavily closed, it is possible to more reliably prevent the backflow of water from a river or the like.

  As described above, according to the present invention, the door body can be moved up and down together with the door support member, and does not deform even when an excessive pressure is applied. It is possible to prevent a situation of coming off the portal frame, and it is possible to perform stable drainage.

It is the front view which looked at the floodgate to which one embodiment of the present invention was attached from the downstream of a waterway. It is YY sectional drawing in FIG. It is an enlarged front view of the door body and door contact member of the embodiment shown in FIG. It is YY sectional drawing in FIG. It is a ZZ enlarged sectional view in FIG. FIG. 4 is a ZZ enlarged sectional view in FIG. 3.

  1 to 6 show one embodiment of the present invention. The flap gate according to the present embodiment includes a frame-shaped door member 1 and a door body 3 that is swingably supported on the door member 1 via a hinge mechanism 2 and that drains water to a river or the like. In a sluice of an industrial or industrial waterway 4, it is vertically movably attached to a portal frame 5 provided on both sides of a drain 4A. The door contact member 1, the hinge mechanism 2, and the door body 3 are formed of a steel material such as stainless steel, for example, except for a watertight rubber described later.

  The cross section of the water channel 4 and the drain port 4A have a rectangular shape, and the lower side of the rectangle formed by the drain port 4A is located slightly above the normal water level of a river or the like. Further, the gate-shaped frame 5 is provided with a pair of door grooves 5A extending upward and parallel along two rectangular sides formed by the drain port 4A, and these door grooves 5A are provided as shown in FIG. It has a U-shaped cross section and is opened so as to face each other in the lateral direction. Further, in the above-mentioned sluice gate, an opening / closing device 6 that opens and closes the drain port 4A by vertically moving the door body 3 together with the door contact member 1 is provided above the center in the horizontal direction between the door grooves 5A. I have.

  The door contact member 1 is formed in a rectangular frame shape, and the lateral width of the outer dimension is smaller than the interval between the groove bottoms of the pair of door grooves 5A and larger than the lateral width of the drain port 4A. At the same time, the height in the vertical direction is made higher than the opening height of the drain port 4A, and the thickness of the door contact member 1 is made larger than the groove width of the door groove 5A. As shown in FIG. 1, such a door support member 1 is attached to the gate-shaped frame 5 such that both sides of a rectangle formed by the frame are respectively housed in a pair of door grooves 5A.

  In addition, a screw shaft 1B is connected to a center of an upper side portion of the rectangle formed by the door support member 1 via a hanging bracket 1A so as to extend upward, and the screw shaft 1B is provided in the opening / closing device 6. It is screwed into a rotatable nut (not shown). Accordingly, the screw shaft 1B moves up and down by rotating the nut electrically or manually, and accordingly, the door contact member 1 is also guided by the door groove 5A on both sides, and the door body 3 is moved as described above. Move up and down with.

  Further, the door contact member 1 of the present embodiment is formed by a rectangular tubular material 1C having a rectangular cross section as shown in FIG. 5 at the upper side and both side portions, and the rectangular tubular material 1C has a cross section. The two long sides of the rectangle are defined as the upstream side (right side in FIGS. 2, 4, and 6 and the upper side in FIG. 5) and the downstream side (the left side in FIGS. 2, 4, and 6 of FIG. Side). On the other hand, the lower side of the rectangular frame formed by the door contact member 1 is formed of a horizontal plate 1D as shown in FIG. 6 that connects the lower ends of both sides.

  As shown in FIG. 5, a watertight rubber 7 having a substantially P-shaped cross section is provided on the surface of the rectangular tube member 1C of the door contact member 1 facing the upstream side of the water passage 4 as shown in FIG. Is protruded so as to face the groove wall surface of the door groove 5A facing the downstream side of the water channel 4, and is attached over the entire length of the upper side portion and both side portions. Further, a plate-shaped watertight rubber 8 is attached to the lower surface of the door member 1 on the lower surface of the plate 1D as shown in FIG. 5 over the entire length of the plate 1D.

  On the other hand, the door body 3 is formed in a rectangular frame shape as shown in FIGS. 1 and 3 by a square bar 3A having a U-shaped cross section, as shown in FIGS. A skin plate 3B is attached to the entire surface of the door body 3 formed in the direction facing the upstream side of the water channel 4 of the door body 3 thus formed in a frame shape so as to cover the inside of the frame. The rectangular bar 3A passed in the lateral direction has an opening having a U-shaped cross section facing downward. The width of the door body 3 in the lateral direction is larger than the width of the opening in the frame of the door contact member 1 and smaller than the width between the groove openings of the pair of door grooves 5A, and the height in the vertical direction The height is higher than the height of the opening inside the frame of the door support member 1 and lower than the height of the outer dimensions of the door support member 1.

  The hinge mechanism 2 for swingably supporting the door 3 on the door member 1 includes a bracket 2A attached to the upper side of the door member 1 as shown in FIGS. A bracket 2B attached to the upper side and an arm 2C having both ends attached to the brackets 2A and 2B are provided. Both ends of the arm 2C are rotatable about a horizontal axis to the brackets 2A and 2B. By being attached, the door body 3 is swingably supported by the door contact member 1. In the present embodiment, a pair of such hinge mechanisms 2 are provided at symmetrical positions with respect to the lateral center of the door support member 1.

  The door body 3 is disposed on the downstream side of the water channel 4 of the door contact member 1 by being suspended by the hinge mechanism 2, and when the drainage from the water channel 4 is not performed or when a river or the like increases in water, the door body 3 is upstream of the water channel 4. When the water pressure acts on the side, the skin plate 3B opposes the door support member 1 and closes the opening in the frame as shown by the solid line in FIGS. When the drainage is performed from the water channel 4, the pressure of the drainage from the drainage port 4A (drainage pressure) causes the door body 3 to rotate around the axis as shown by a chain line in FIG. Open the opening to discharge drainage to rivers.

  Further, in the present embodiment, the door body 3 is also provided with a watertight rubber 9 over the entire periphery of the rectangle formed by the door body 3 and is interposed between the door body 3 and the watertight rubber 9. The watertight rubber 9 of the door body 3 is a plate-like member whose cross section is obliquely bent in two steps as shown in FIGS. 5 and 6, and one side of the bent is fixed to the skin plate 3B. At the same time, the other side projects parallel to the one side toward the door contact member 1 side and is supported by a convex portion 3C provided on the skin plate 3B, and the water passage between the square tubular member 1C of the door contact member 1 and the plate member 1D. 4 It can be brought into close contact with the surface facing the downstream side.

  In the flap gate configured as described above, the frame-shaped door contact member 1 has its both sides accommodated in the pair of door grooves 5A of the gate-shaped frame 5 provided on both sides of the drain 4A of the water channel 4. Since the door body 3 is swingably supported by the frame-shaped door support member 1 via the hinge mechanism 2, the strength of the door support member 1 is ensured and the door body 3 is mounted. It can be attached to the door support member 1 with high rigidity. For this reason, even if excessive pressure acts on the door body 3 and the door contact member 1 at the time of drainage or increasing water in a river or the like, it is possible to prevent the door contact member 1 and the door body 3 from being deformed.

  In particular, in the present embodiment, since the upper side portion and the two side portions of the rectangular frame-shaped door support member 1 are formed by the rectangular tubular material 1C having a rectangular cross section, higher strength can be secured, Deformation and the like can be more reliably prevented. On the other hand, since the lower side portion of the door contact member 1 is formed by the plate member 1D which is thinner than the rectangular tubular member 1C, a step generated between the bottom surface of the water channel 4 and the lower side portion of the door contact member 1 is reduced. Thus, it is possible to prevent garbage and the like in the drainage from accumulating on the step.

  Further, the door support member 1 is formed in a rectangular frame shape, and both sides are accommodated in a pair of door grooves 5A extending in parallel upward and attached to the portal frame 5, so that this portal frame is provided. The door support member 1 and the door body 3 do not come off from the gate-shaped frame 5 due to the inclination in the inside 5. For this reason, the operation of draining from the water channel 4 due to the swing of the door body 3 and closing the drain port 4A at the time of increasing water in a river or the like can be automatically performed stably for a long period of time.

  Further, in the flap gate having the above-described configuration, the door contact member 1 for swingably supporting the door body 3 is attached to the gate-shaped frame 5 so as to be vertically movable, and thus is similar to the flap gate described in Patent Document 1. When an obstacle is caught between the door body 3 and the door support member 1, the door body 3 is lifted up together with the door body 3 by the screw shaft 1 </ b> B and the opening / closing device 6, thereby opening near the river or the like. Such an obstacle can be easily removed without the worker approaching the drain 4A.

  Furthermore, a sliding gate that opens and closes a drain port 4A by attaching a mere plate-shaped door body that is not swingable to the gate-shaped frame 5 and moving it up and down by a screw shaft 1B is provided. According to the flap gate having the above configuration, even when the flap gate is automatically replaced with a flap gate that automatically closes the door, the flap gate as in the present embodiment can be attached by removing the plate-shaped door from the screw shaft 1B. Only needs to be done. Therefore, it is possible to easily replace the existing sliding gate with the flap gate in a short time without requiring civil works or the like.

  Furthermore, in the present embodiment, the watertight rubber 7 is attached to the surface facing the upstream side of the water channel 4 of the square tubular member 1C on the upper side portion and both side portions of the door contact member 1, and the lower side portion is attached to the lower surface of the plate member 1D. When the watertight rubber 8 is attached and the door contact member 1 is disposed at the position of the drain port 4A, these watertight rubbers 7 and 8 are located between the door member 1 and the periphery of the opening of the drain port 4A. Interposed. Furthermore, in the present embodiment, the watertight rubber 9 is also attached to the surface of the door body 3 facing the upstream of the water channel 4, and when the door body 3 closes the opening in the frame of the door contact member 1, the watertight rubber 9 is closed. The rubber 9 is interposed between the rubber member 9 and the door support member 1.

  Therefore, when water pressure acts on the door body 3 and the door contact member 1 toward the upstream side of the water channel 4 at the time of increasing water in a river or the like, the watertight rubbers 7 to 9 cause the gap between the door body 3 and the door contact member 1 and the door. Since the drain port 4A can be closed by doubly sealing between the member 1 and the periphery of the opening of the drain port 4A, it is possible to more reliably prevent water such as a river from flowing back into the water channel 4. Can be. Since the watertight rubber 8 attached to the lower surface of the plate 1D on the lower side of the door contact member 1 is a thin plate like the plate 1D, the bottom surface of the water channel 4 and the lower side of the door contact member 1 are connected to each other. The step generated between them does not increase.

In the present embodiment, the cross section of the water channel 4 and the drain port 4A are rectangular, whereas the door contact member 1 is formed in a rectangular frame shape, and the opening in the frame is also rectangular. In addition, the door 3 is also formed in a rectangular shape capable of closing the opening in the frame. For example, when the cross section of the water channel 4 and the drainage port 4A are circular, the opening in the frame is used. May also be circular .

DESCRIPTION OF SYMBOLS 1 Door contact member 1B Screw shaft 1C Square tube material 1D Plate material 2 Hinge mechanism 3 Door body 3A Square material 3B Skin plate 4 Waterway 4A Drain port 5 Portal frame 5A Door groove 6 Opening / closing device 7-9 Watertight rubber

Claims (2)

A flap gate that opens and closes a drain of a water channel with a swingable door body,
The door body is formed in a rectangular frame shape by a square member having a U-shaped cross section, and a square member having a U-shaped cross section is attached to a central portion in the vertical direction in a lateral direction, thereby forming a frame shape. A skin plate is attached to the entire surface of the door body facing the upstream side of the water channel so that the inside of the frame is covered, and can be moved up and down by the portal frame provided on both sides of the drain port It is swingably supported via a hinge mechanism on a frame-shaped door contact member attached to the
The door contact member is formed in a rectangular frame shape, the upper side portion and both side portions of the rectangular frame shape are formed by a rectangular tubular material having a rectangular cross section, and the lower side portion of the rectangular frame shape is formed on the both sides. A flap gate formed of a horizontal plate connecting the lower ends of the sides.   The watertight rubber is interposed between the door contact member and the door body and between the door contact member and the periphery of the opening of the drain port. Flap gate.

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