JP2008045348A - Bottom-sealing device of rotary type gate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bottom-sealing device of a rotary type gate which can retain a water-tight condition between the gate and the bottom of a water passage even when a door is bent because of water pressure. <P>SOLUTION: A gate body is formed by attaching the door 5 to the space between the circumferences of the right and left supporting discs. Then the gate body is arranged in the waterway 1 between the right and left supporting pillar members so that the gate body crosses the waterway 1, and the rotary type gate is formed so that it can perform rotary operation about a horizontal axis. A watertight rubber attachment base 13 is provided to the end part on the upstream side of a dug ditch pit 11 provided on the bottom of the waterway 1, and water-tight rubber 14 is attached. Then helical compression springs 24a, 24b, 24c are placed between the body 15 of the midpoint of the water-tight rubber 14 in the longitudinal direction and the watertight rubber attachment base 13. By energizing at all times the midpoint of the water-tight rubber 14 in the longitudinal direction to the skin plate 5a side of the door 5 by the helical compression springs 24a, 24b, 24c, the water-tight rubber 14 is made to follow and the amount of pressing is secured even when the door 5 is bent and the skin plate 5a is displaced to the downstream side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a watertight structure between the door body and the bottom of the waterway in a rotary gate that is installed at a midway position in a river or waterway and is opened and closed by rotating the door body around a horizontal axis. The present invention relates to a bottom seal device for a rotary gate.

  A roller gate type gate is generally used as a gate that is provided in the middle of a river or waterway to adjust the flow rate. Such a roller gate has a vertical support pillar member (peer) installed at a necessary interval in the width direction of the river as a gate frame, and a gate door body that can be moved up and down between adjacent support pillar members. The body can be moved up and down (opened and closed) by an opening and closing device installed at the upper end of the support column member.

  However, in the roller gate, it is necessary to secure a height dimension corresponding to the lifting of the gate door body on the water surface in each of the support column members, and an elevating device is installed at the upper end of the support column member. Therefore, a large structure protrudes on the surface of the water, which has an unfavorable effect on the surrounding environment and the landscape.

  Therefore, in recent years, a rotary gate has been developed as one of the gate types that can eliminate the problems of the roller gate as described above by eliminating the need to provide a lifting device at the upper end of the support column member. Yes.

  As shown in FIGS. 5 and 6 (a), (b), and (c), an example of such a rotary gate is provided with support pillar members (peers) 2 as frame bodies at a required interval in the width direction of the river. Thus, a water channel 1 is formed between adjacent support column members 2. Further, an arcuate shape (substantially crescent shape) is provided between the peripheral portions of the pair of left and right support disks 4 and has a skin plate 5a that curves over a required angle range with a curvature similar to that of the outer peripheral surface of the support disk 4. The gate body 3 is configured by disposing a door body 5 extending in the left-right direction in a cross-sectional shell structure and attaching the left and right ends of the door body 5 to the support disk 4 respectively. Further, the gate main body 3 is disposed so as to cross the water channel 1 between the left and right support column members 2, and the inner side surface portions (the central side surface of the water channel 1) of the left and right support column members 2 facing each other across the water channel 1. And the left and right support disks 4 of the gate body 3 are rotatably supported via left and right horizontal support shafts 6 disposed at the centers of the respective support disks 4. The support shaft 6 can be rotated around the support shaft 6 in the water channel 1 between the left and right support column members 2.

  Further, as the rotational drive mechanism 7 of the gate body 3, a rack portion 8 such as a pin rack extends in the circumferential direction on the outer peripheral end portion of one of the left and right support discs 4 (right side in the figure). In addition, the pinion 10 attached to the output shaft of the drive device 9 such as a hydraulic motor installed in the support column member 2 on the corresponding side is engaged with the rack portion 8.

  A digging pit 11 as a door body accommodating recess is provided at a location corresponding to the position of the gate body 3 at the bottom of the water channel 1 between the left and right support pillar members 2, and the door body 5 is connected to the gate body. 3, the door body 5 is accommodated in the dug pit 11 so that the back surface of the door body 5 coincides with the bottom surface of the water channel 1.

  According to the rotary gate having the above configuration, when the pinion 10 is rotationally driven by the driving device 9, the gate main body 3 can be rotated integrally with one support disk 4 provided with the rack portion 8. Thus, the angle and height position of the door body 5 provided in the gate body 3 can be freely changed. Therefore, for example, as shown in FIG. 6 (a), the gate body 3 is rotated by a required amount by the rotation drive mechanism 7, and the door body 5 is disposed at the lowermost end portion of the gate body 3 to dig the bottom of the water channel 1 above. By fixing as the state accommodated in the pit 11, the water channel 1 is fully opened, and water can flow naturally from the upstream side (river upstream side) U to the downstream side D.

  Further, as shown in FIG. 6 (b), the gate body 3 is rotated by a required angle counterclockwise from the state shown in FIG. By fixing the water channel 1 so as to protrude from the bottom surface to a required height position, the water level can be adjusted on the upstream side U by causing the door body 5 to act as a weir.

  Further, as shown in FIG. 6C, the gate body 3 is further rotated counterclockwise in the figure by the rotation driving mechanism 7 so that only the rear end portion (lower end portion) of the skin plate 5a of the door body 5 is obtained. Is placed so as to cover the upstream end of the water channel 1 of the dug pit 11 and the upper end (top end) of the door body 5 is further lifted and fixed, so that the water channel 1 is fully closed. The water level of the upstream U can be maintained at a higher level (see, for example, Patent Document 1).

  By the way, the rotary gate is a bottom seal device for sealing between a required portion of the door body 5 of the gate body 3 and the bottom of the water channel 1 over the entire length in the span direction (longitudinal direction of the door body 5). And a side seal device for sealing between the both end portions of the gate body 3 and the support pillar members 2 positioned on the left and right sides thereof, so as to form a watertight structure.

  As the rotary gate bottom seal device, a bottom seal device 12 of the type shown in FIG. 7 has been proposed. This is because the watertight rubber mounting seat (support metal fitting) 13 is watertight over the entire length in the span direction at a required portion of the dug pit 11 at the bottom of the waterway 1 near the upstream end (left end in the figure). The gap between the upper surface of the watertight rubber mounting seat 13 and the skin plate 5a of the door body 5 is formed to be slightly narrower than the height of the watertight rubber 14. Further, a watertight rubber 14 extending over the entire length in the span direction is attached to the upper side of the watertight rubber mounting seat 13.

  Furthermore, the watertight rubber 14 has a substantially Ω-shaped cross section comprising a hollow main body 15 and a mounting portion 16 extending so as to protrude from the base end side of the main body 15 to both sides in the width direction. It is also proposed to attach the watertight rubber 14 to the watertight rubber mounting seat 13 by bolting the mounting portions 16 to the watertight rubber mounting seat 13 at required intervals in the longitudinal direction. Yes.

  According to the bottom seal device 12 configured as described above, the watertight rubber 14 attached to the watertight rubber mounting seat 13 is between the watertight rubber mounting seat 13 and the skin plate 5a of the door body 5. Since it is in a state of being somewhat compressed in the height direction, the tip (protruding end) of the main body 15 of the watertight rubber 14 can be pressure-bonded (adhered) to the skin plate 5 a of the door body 5 of the gate main body 3. The watertight state between the door 5 and the bottom of the water channel 1 can be maintained. When the gate body 3 is rotated to change the angular arrangement of the door body 5, the skin plate 5 a of the door body 5 is slid with respect to the distal end portion of the body portion 15 of the watertight rubber 14. The door body 5 can be moved while maintaining a watertight state between the door body 5 and the bottom of the water channel 1. Reference numeral 17 denotes a soil entry prevention rubber provided at a position closer to the upstream side of the water channel 1 than a position at which the watertight rubber 14 is attached to the watertight rubber mounting seat 13 (see, for example, Patent Document 2).

  Further, as another type of rotary gate bottom seal device, as shown in FIG. 8, a dug pit 11 provided at the bottom of the water channel 1 of the rotary gate is provided on the skin plate 5a of the door body 5. When the curved shape conforms to the curved shape, a water-tight rubber 14 similar to that shown in FIG. 7 and a water-tight rubber mounting seat 13 are provided at a required position near the rear end of the skin plate 5a of the door body 5 of the gate body 3. A bottom seal device 12a of the type that is attached over the entire length of the door body 5 in the left-right width direction is also conceivable.

  According to the bottom seal device 12a of this type, the tip of the main body 15 of the watertight rubber 14 attached to the door body 5 side is pressure-bonded to the inner surface of the digging pit 11 at the bottom of the water channel 1, thereby The watertight state between the door body 5 and the bottom of the water channel 1 can be maintained. When the gate body 3 is rotated to change the angular arrangement of the door body 5, the body portion 15 of the watertight rubber 14. By sliding the front end of the pit 11 with respect to the inner surface of the digging pit 11, the door 5 can be moved while maintaining a watertight state between the door 5 and the bottom of the water channel 1. is there. Reference numeral 18 denotes a sediment entry prevention plate provided in the vicinity of the upstream side of the dug pit 11 at the bottom of the water channel 1 (see, for example, Patent Document 3).

  Furthermore, another type of bottom sealing device for a rotary gate that has been proposed in the past is a bottom sealing device 19 as shown in FIG. This is because the elastic body 20 which is hollow and has a constricted cross-sectional shape in the middle in the vertical direction is used as the skin of the door body 5 of the gate body 3 (see FIGS. 5 and 6 (a), (b) and (c)). The plate 5a is disposed at a required portion near the rear end so as to extend over the entire length in the left-right width direction, and the lower end of the elastic body 20 is connected to the door via a required mounting member (partial fan-shaped body) 21. The tube 5 is attached to the skin plate 5 a of the body 5, and a tubular air bag 23 extending in the longitudinal direction is inserted into the hollow portion 22 on the distal end side of the elastic body 20.

  According to the bottom seal device 19 of this type, the door body 5 is arranged in a required angle and orientation in the water channel 1 (see FIGS. 5 and 6 (a), (b) and (c)), and the door body 5 side In the state where the elastic body 20 attached to the inner surface of the digging pit 11 at the bottom of the water channel 1 is opposed to a required portion, air is supplied to the air bag 23 at the tip of the elastic body 20 to supply the air. By making the atmospheric pressure in the bag 23 equal to or higher than the atmospheric pressure, the tip of the elastic body 20 is brought into close contact with the inner surface of the dug pit 11, and a watertight state is established between the door body 5 and the bottom of the water channel 1. When the gate body 3 is rotated to change the angular arrangement of the door body 5, the pressure in the air bag 23 is set to atmospheric pressure or lower, so that the elastic body 20 can be made non-contact with the inner surface of the digging pit 11. That (for example, see Patent Document 4).

JP 2003-155731 A Japanese Patent Laid-Open No. 10-183586 JP-A-9-158159 JP-A-11-81286

  However, both the bottom seal device 12 shown in FIG. 7 and the bottom seal device 12a shown in FIG. 8 can maintain the watertight state of the door 5 of the rotary gate and the bottom of the water channel 1. However, when the rotary gate is a long span gate, it may be difficult to maintain a watertight state between the door 5 and the bottom of the water channel 1.

  That is, since the door 5 of the rotary gate is, as shown in FIG. 5, only the left and right ends are supported by the support disk 4, the span of the rotary gate is increased. When the left-right width dimension of the door body 5 increases, the amount of bending when the door body 5 bends downstream of the water channel 1 due to the water pressure of the dammed water increases when the door body 5 acts as a weir. . Thus, when the door body 5 is largely bent toward the downstream side, the intermediate portion in the left-right width direction of the door body 5 is greatly displaced toward the downstream side.

  Therefore, in the bottom seal device 12 of the type shown in FIG. 7, the skin plate 5a of the door body 5 is dug in the bottom of the water channel 1 in the portion where the door body 5 is largely displaced downstream as described above. The door of the main body 15 of the watertight rubber 14 due to displacement in the direction away from the installation location of the watertight rubber 14 near the upstream end of the water channel 1 in the pit 11 (direction indicated by arrow x in the figure). There is a risk that the amount of pressure bonding of the body 5 to the skin plate 5a may be insufficient.

  On the other hand, when the bottom seal device 12a of the type shown in FIG. 8 is adopted, when the door body 5 is arranged in an angle posture so as to protrude from the bottom of the water channel 1 to the required height position, The watertight rubber 14 provided near the rear end of the skin plate 5 a of the door 5 is in contact with the inner surface of the dug pit 11 near the upstream end. For this reason, in the portion where the door body 5 acting as a weir as described above is largely displaced downstream, the installation location of the watertight rubber 14 in the skin plate 5a of the door body 5 is the digging pit 11. In this case, the digging pit 11 of the main body 15 of the watertight rubber 14 is also displaced in a direction (indicated by an arrow x in the figure) away from the inner surface near the upstream end portion of the watertight rubber. There is a risk that the amount of crimping on the inner surface becomes insufficient.

  As shown in FIG. 9, the bottom seal device 19 disclosed in Patent Document 4 has a structure in which an air bag 23 is inserted into the hollow portion 22 on the distal end side of the elastic body 20, so that the door body 5 bends and is skinned. The amount of air supplied to the air bag 23 even if the space between the installation location of the elastic body 20 on the plate 5a and the inner surface of the digging pit 11 to be contacted with the tip of the elastic body 20 is slightly increased It is considered that the tip of the elastic body 20 can be inflated to increase the air bag 23. However, the air bag 23 is assumed to simply extend in the longitudinal direction of the elastic body 20, The distribution of the deformation amount in the width direction of the door body 5 when the door body 5 is bent by water pressure is not taken into consideration.

  Further, the bottom seal device 19 sets the pressure in the air bladder 23 to atmospheric pressure or higher when forming a watertight state, while increasing the pressure in the air bladder 23 when rotating the gate body 3. The operation of changing the angle and orientation of the door body 5 to open and close the door body 5 to make the pressure at or below the atmospheric pressure is very complicated. Further, an air supply / discharge device and an air supply / discharge line connecting the supply / discharge device and the air bag 23 must be provided, and the air supply / discharge line can cope with the rotation of the gate body 3. Since it is necessary to make the structure, there is a problem that the configuration becomes complicated.

  Furthermore, as described above, in order to change the height dimension of the elastic body 20 in accordance with the bending of the door body 5, the amount of air supplied to the air bag 23 depends on how the door body 5 is bent. Therefore, the control of the air supply / discharge amount with respect to the air bag 23 is also complicated. Furthermore, if the air supply / exhaust device fails, or air leakage occurs at any one of the air supply / exhaust line and the air bag 23, the watertight structure at the bottom of the door of the rotary gate may not function at all. There is also.

  Therefore, the present invention can automatically maintain the watertight state between the door body and the bottom of the water channel even when the door body of the gate body is bent by water pressure, and is advantageous when the rotary gate is applied between the long diameters. It is an object of the present invention to provide a bottom seal device for a rotary gate that can be made simple and can have a simple structure.

  In order to solve the above-mentioned problems, the present invention provides a gate main body comprising left and right support disks and a door attached between the peripheral parts of the left and right support disks. The door body can be opened and closed by rotating it, and further, the above-mentioned digging in the rotary gate is provided with a pit pit for accommodating the door body arranged at the bottom end of the gate body at the bottom of the water channel. A watertight rubber mounting seat is provided in the spanwise direction at the upstream end of the pit, and a watertight rubber for attaching the watertight rubber mounting seat to the skin plate of the door body is attached to the watertight rubber mounting seat, and a longitudinal intermediate portion of the watertight rubber; A spring member is interposed between the watertight rubber mounting seat, and the longitudinal intermediate portion of the watertight rubber can be constantly urged toward the skin plate side of the door body by the elastic force of the spring member. The configuration is as follows.

  According to claim 2, the gate body comprising the left and right support disks and the door body attached between the peripheral portions of the left and right support disks can be opened and closed by rotating in the water channel. Furthermore, the required position of the skin plate of the door body in the rotary gate provided with a pit having an arc-shaped cross section for accommodating the door body arranged at the lowermost end portion of the gate body at the bottom of the water channel In addition, a watertight rubber mounting seat is provided in the span direction, and a watertight rubber for attaching the watertight rubber mounting seat to the inner surface of the pit pit is attached to the watertight rubber mounting seat, and an intermediate portion in the longitudinal direction of the watertight rubber, and the watertight rubber mounting A spring member is interposed between the seat and a structure in which the middle portion in the longitudinal direction of the watertight rubber can be constantly urged toward the inner surface side of the digging pit by the elastic force of the spring member. .

  Further, in each of the above configurations, the compression amount of the spring member interposed between the middle portion in the longitudinal direction of the water-tight rubber and the water-tight rubber mounting seat is different, and the compression amount becomes closer to the longitudinal center position of the water-tight rubber. A large spring member is interposed.

  The spring member in each configuration described above is a compression coil spring, and a large number of the spring members are arranged at a required interval in the longitudinal direction of the watertight rubber between the intermediate portion in the longitudinal direction of the watertight rubber and the watertight rubber mounting seat. The configuration is as described above.

  Further, in each of the above-described configurations, the base end portions of the plurality of compression coil springs are attached to the base plate having a required length dimension at a required distance in the longitudinal direction at a position perpendicular to the surface of the base plate, A spring unit is formed by connecting the tip ends of the plurality of compression coil springs whose base end sides are connected to each other via the base plate via a tip plate arranged on the tip side, and is formed in the middle in the longitudinal direction of the watertight rubber. The spring unit is arranged in the longitudinal direction of the watertight rubber between the portion and the watertight rubber mounting seat.

According to the rotary gate bottom seal device of the present invention, the following excellent effects are exhibited.
(1) A gate body composed of left and right support disks and a door body attached between the peripheral portions of the left and right support disks is rotated in the water channel so that the door body can be opened and closed. A watertight rubber mounting seat is installed in the span direction at the upstream end of the above-mentioned digging pit in the rotary gate provided with a digging pit for accommodating the door body arranged at the lowermost end of the gate body at the bottom. A watertight rubber for attaching the watertight rubber mounting seat to the skin plate of the door body is attached, and a spring member is interposed between the intermediate portion in the longitudinal direction of the watertight rubber and the watertight rubber mounting seat. The structure in which the longitudinal intermediate portion of the water-tight rubber can be constantly urged toward the skin plate side of the door body by the elastic force of the spring member, or the door body in the rotary gate similar to the above Required skin plate A water-tight rubber mounting seat is provided in the span direction, a water-tight rubber for attaching the water-tight rubber mounting seat to the inner surface of the trench pit, and a middle portion in the longitudinal direction of the water-tight rubber, and the water-tight rubber A structure in which a spring member is interposed between the mounting seat and the middle portion in the longitudinal direction of the watertight rubber can be constantly urged toward the inner surface side of the digging pit by the elastic force of the spring member. Therefore, when the door body acts as a weir, even if the door body is greatly bent to the downstream side due to water pressure and the longitudinal intermediate portion of the skin plate is greatly displaced to the downstream side, the displacement follows the displacement. The longitudinal intermediate portion of the water-tight rubber can be displaced so as to be pushed out, and the pressure-bonding amount of the water-tight rubber can be ensured over the entire length in the longitudinal direction. For this reason, the watertight state between a door body and a water channel bottom part can be kept favorable, and the possibility that a leak will occur can be prevented. Therefore, it can be made suitable as a bottom seal device when the rotary gate is a long span gate.
(2) In addition, the operation of causing the middle portion of the water-tight rubber in the longitudinal direction to follow the displacement of the door body to the downstream side of the skin plate can be automatically performed by the elastic force of the spring member. Therefore, there is no possibility that the operation of changing the angular posture of the door body becomes complicated. In addition, the apparatus configuration can be simplified.
(3) A spring member having a larger amount of compression as it approaches the center position in the longitudinal direction of the water-tight rubber so that the amount of compression of the spring member interposed between the middle portion of the water-tight rubber and the water-tight rubber mounting seat is different. By being configured to interpose, it is possible to urge the intermediate portion in the longitudinal direction of the water-tight rubber with a displacement stroke corresponding to the bending shape due to the water pressure of the door body. Further, the both ends of the watertight rubber in the longitudinal direction are not biased by the spring member. For this reason, it is possible to prevent the possibility of excessive resistance when the gate body is rotated to change the angular posture of the door body. Therefore, the performance required for the rotation drive mechanism of the gate body can be suppressed.
(4) The spring member is a compression coil spring, and a large number of spring members are arranged at a required interval in the longitudinal direction of the watertight rubber between the longitudinal intermediate portion of the watertight rubber and the watertight rubber mounting seat. By adopting such a configuration, the longitudinal intermediate portion of the watertight rubber can be easily urged. Further, the base end portions of the plurality of compression coil springs are attached to the base plate having a required length dimension at a required distance in the longitudinal direction so as to be perpendicular to the surface of the base plate, and the base end is interposed via the base plate. A spring unit is formed by connecting the tip ends of the plurality of compression coil springs whose sides are connected to each other via a tip plate arranged on the tip side, and a watertight rubber longitudinal intermediate portion and watertight rubber mounting By arranging the spring unit in the longitudinal direction of the water-tight rubber between the seats, each compression coil spring is placed between the longitudinal intermediate portion of the water-tight rubber and the water-tight rubber mounting seat. The work to interpose can be made easy. Further, since the tip plate is provided on the tip side of each compression coil spring, the elastic force of each compression coil spring can be applied to the watertight rubber without being unevenly distributed in the longitudinal direction.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIGS. 1 to 3 (a), (b), (c), and (d) show an embodiment of the bottom seal device for a rotary gate according to the present invention. C) A watertight rubber mounting seat 13 similar to that shown in FIG. 7 is provided over the entire length in the span direction on the edge of the upstream side of the dug pit 11 at the bottom of the water channel 1 in the same rotary gate as shown in FIG. Provide. Furthermore, the watertight rubber 14 is attached to the watertight rubber mounting seat 13 over the entire length in the span direction, and a required length region (hereinafter referred to as a longitudinal intermediate portion) 14a in the middle portion in the longitudinal direction of the watertight rubber 14 is provided. A large number of compression coil springs 24 a, 24 b, 24 c as spring members are interposed in the longitudinal direction of the water-tight rubber 14 between the water-tight rubber 14 and the water-tight rubber mounting seat 13. The intermediate portion 14a in the longitudinal direction can be urged toward the door body 5 side of the gate body 3 (in the rotational axis direction of the gate body 3) by the elastic force of the compression coil springs 24a, 24b, 24c.

  Furthermore, when the door body 5 of the rotary gate is bent by water pressure, the amount of displacement from the initial state increases as the door body 5 approaches the center position in the left-right width direction, that is, the center position C in the span direction. In view of this, the compression coil springs 24a, 24b, and 24c are a plurality of types of compression coil springs having different free height dimensions, for example, as shown in FIGS. 3 (B), (C), and (D). Three kinds of compression coil springs 24 a, 24 b, 24 c having a thickness dimension of La> Lb> Lc are prepared, and a compression coil is interposed between the longitudinal intermediate portion 14 a of the watertight rubber 14 and the watertight rubber mounting seat 13. When interposing the springs 24a, 24b, 24c, as shown in FIG. 3 (a), a compression coil spring 24a having the largest free height La is provided near the center position C in the radial direction, The compression coil springs 24b and 24c that gradually decrease in the free height dimensions Lb and Lc from the vicinity of the center position C in the radial direction to the left and right sides are disposed in a compressed state to the same compression height dimension. like That. As a result, the longitudinal intermediate portion 14a of the watertight rubber 14 can be urged toward the door 5 with a larger displacement stroke as it approaches the center position C in the radial direction.

  More specifically, the watertight rubber 14 has a substantially cross-sectional shape in which mounting portions 16 for bolting to the watertight rubber mounting seat 13 are extended on both sides of the hollow main body portion 15 in the same manner as shown in FIG. Ω-shaped. The mounting portions 16 are reinforced by attaching thin plate-like reinforcing members 25 and 26 extending in the longitudinal direction to the front surface side and the back surface side, respectively. Further, the reinforcing member 25 on the surface side is bent on one side in the width direction near the main body portion 15 toward the distal end side of the main body portion 15 so as to be along the side surface of the main body portion 15 over a required dimension, When sliding the tip of the main body 15 of the watertight rubber 14 and the skin plate 5 a of the door 5, the main body 15 of the watertight rubber 14 is accompanied by the movement of the skin plate 5 a of the door 5. Thus, the possibility of excessive deformation in the width direction can be prevented.

  In the watertight rubber 14, the longitudinal intermediate portion 14 a to be urged toward the door body 5 by the compression coil springs 24 a, 24 b, 24 c is upstream of the door body 5 when the door body 5 acts as the highest weir. The distribution in the width direction of the amount of displacement of the door body 5 in the downstream direction when the door body 5 is bent downstream by the water pressure of the water blocked on the side, the watertight rubber mounting seat 13 and the door body in the initial state It may be determined in consideration of the amount of elastic deformation of the watertight rubber 14 disposed in a state of being slightly crushed between the skin plate 5a and the skin plate 5a. Specifically, the skin plate 5a when the door body 5 bends to the downstream side as described above based on the rigidity of the door body 5 and the right and left width dimensions is the downstream side from the initial state, that is, the watertight rubber mounting seat. The distribution of displacement in the left-right width direction when displacement in a direction away from 13 is obtained, and the displacement from the initial state of the obtained skin plate 5a is the water-tight rubber attached to the water-tight rubber mounting seat 13. The portion of the door body 5 that cannot be followed by the elastic deformation 14 and reaches a displacement such that there is a risk of insufficient crimping between the main body portion 15 of the watertight rubber 14 and the skin plate 5a of the door body 5 is provided. The region of the required length of the intermediate portion in the longitudinal direction of the watertight rubber 14 to be pressed against the intermediate portion in the left and right width direction of the selected door body 5 is selected as the intermediate portion in the longitudinal direction. Set as part 14a That. For example, when the span of the rotary gate is about 22 m, it may be set as a range of 5 m on the left and right sides from the center position C in the span direction.

  The compression coil springs 24a, 24b, 24c are spaced apart from each other by bolts to the water-tight rubber mounting seat 13 at the mounting portions 16 of the water-tight rubber 14 for each of the same free height dimensions La, Lb, Lc. Longitudinal on the surface side of an elongated flat plate-like base plate 27 having a narrower width dimension and a required length dimension, for example, a length dimension of about 1 m, so that it can extend and contract in a direction perpendicular to the surface of the base plate 27. A plurality of compression coil springs 24a, 24b, 24c are arranged at required intervals in the direction, and the base ends of the compression coil springs 24a, 24b, 24c are fixed to the surface of the base plate 27 by welding or the like. Further, the compression coil springs 24a, 24b, 24c, whose base ends are connected to each other by the base plate 27, have a width dimension slightly larger than the outer diameter of the compression coil springs 24a, 24b, 24c, and A tip plate 28 having an elongated flat plate shape having a length similar to that of the base plate 27 and having a smooth curved surface at all corners on the surface side is disposed so as to be parallel to the base plate 27, and The distal end portions of the compression coil springs 24a, 24b, 24c are integrally fixed to the back surface of the distal end plate 28 by welding or the like, and the compression coil springs 24a, 24b, 24c having the same free height dimensions La, Lb, Lc are connected to each other. Are provided between the base plate 27 and the tip plate 28, and a plurality of spring units 29a, 29 are provided. , To form a 29c.

  On the upper surface of the longitudinal intermediate portion of the watertight rubber mounting seat 13 corresponding to the longitudinal intermediate portion 14a of the watertight rubber 14, the required number of the spring units 29a, 29b and 29c are provided in the longitudinal direction, for example, in the span direction. From the central position C, one spring unit 29a, two spring units 29b, and two spring units 29c are arranged in order, and the base plate 27 of each of the spring units 29a, 29b, and 29c is attached to the watertight rubber mounting seat 13. It is made to attach to the upper surface of this by welding or the like.

  Further, the water-tight rubber 14 extending over the entire length in the spanwise direction is provided on the surface side of the water-tight rubber mounting seat 13, and the distal ends of the spring units 29 a, 29 b, and 29 c at the longitudinal intermediate portion 14 a of the water-tight rubber 14. In a state where the end plates 28 of the respective spring units 29a, 29b and 29c are in contact with the back side of the main body portion 15 in the longitudinal intermediate portion 14a of the watertight rubber 14, respectively. The mounting portions 16 for the watertight rubber 14 are fixed to the watertight rubber mounting seats 13 with bolts.

  5 and 6 (a), (b), (c), and the same components as those shown in FIG. 7 are denoted by the same reference numerals.

  In the case of the rotary gate equipped with the bottom seal device having the above-described configuration, when the water pressure is not applied to the door body 5 and the door body 5 is hardly bent downstream, the moat at the bottom of the water channel 1 is used. The front end side of the main body 15 of the watertight rubber 14 disposed on the upstream side of the recessed pit 11 via the watertight rubber mounting seat 13 is pressure-bonded to the skin plate 5a of the door body 5 over the entire length in the longitudinal direction. Therefore, the space between the door body 5 and the bottom of the water channel 1 is kept in a watertight state.

  When the door body 5 acts as a weir and the water pressure of the dammed water comes to act greatly, the door body 5 bends downstream. When the central part in the left-right width direction of the door body 5 is greatly displaced to the downstream side of the water channel 1 by this bending, the skin plate 5a installs the water-tight rubber 14 in the central part in the left-right width direction of the door body 5. The water-tight rubber mounting seat 13 is greatly displaced to the downstream side of the water channel 1, but the water-tight rubber 14 has a main body portion 15, a water-tight rubber mounting seat 13, and an intermediate portion 14 a in the longitudinal direction. The main body 15 is always urged toward the door 5 by the elastic force of the compression coil springs 24a, 24b, 24c of the spring units 29a, 29b, 29c disposed between them. Therefore, the main body portion 15 in the longitudinal intermediate portion 14a of the watertight rubber 14 is displaced so as to be pushed out to the door body 5 following the displacement of the skin plate 5a of the door body 5 to the downstream side of the water channel 1. Door can be.

  In addition, as described above, when the door body 5 bends to the downstream side due to the action of water pressure, the amount of displacement of the door body 5 to the downstream side is the largest at the central portion in the left-right width direction, and the left-right direction from the central portion. However, in the bottom seal device, the distance between the main body 15 and the watertight rubber mounting seat 13 in the longitudinal intermediate portion 14a of the watertight rubber 14 is the most in the vicinity of the center position C in the radial direction. A compression unit spring 29a including a compression coil spring 24a having a large free height La is interposed, and the free height is reduced in order of Lb and Lc as the distance from the center position C in the radial direction increases in the left-right direction. Since the spring units 29b and 29c having the coil springs 24b and 24c are arranged in this order, the spring units 29b and 29c are arranged in the radial direction with respect to the main body portion 15 of the longitudinal intermediate portion 14a of the watertight rubber 14. The large displacement stroke in the vicinity of the center position C, also with distance to the left and right sides from the span direction central position near the C, sequentially becomes smaller as the displacement stroke can be imparted, respectively. Therefore, the main body 15 in the intermediate portion 14 a in the longitudinal direction of the watertight rubber 14 can be displaced by pushing it toward the door body with a displacement stroke corresponding to the bending shape of the door body 5.

  As described above, even if the door body 5 is bent by water pressure, the amount of crimping of the distal end portion of the main body portion 15 in the intermediate portion 14 in the longitudinal direction of the watertight rubber 14 with respect to the skin plate 5a in the center portion in the left-right width direction of the door body 5 is reduced. Can be secured.

  In addition, since the said door body 5 is each what the both ends of the left-right width direction are each attached to the left and right support disk 4 (refer FIG. 5), it is in the state in which water pressure is acting on this door body 5. However, both end portions in the width direction of the door body 5 are not displaced so much downstream. Therefore, at both ends of the watertight rubber 14 in the longitudinal direction, the amount of pressure bonding between the tip of the main body 15 of the watertight rubber 14 and the skin plate 5a of the door 5 is ensured only by elastic deformation of the watertight rubber 14. Is done.

  Thus, according to the bottom seal device of the rotary gate of the present invention, even when the door 5 of the rotary gate acts as a weir, even if the door 5 is greatly bent downstream by water pressure, the watertight rubber Since the amount of crimping of the front end portion of the main body portion 15 to the skin plate 5a of the door body 5 can be ensured over the entire length in the longitudinal direction, the watertight state between the door body 5 and the bottom of the water channel 1 is good. Therefore, it is possible to prevent the possibility of leakage. For this reason, the said bottom part sealing apparatus can be made suitable as a bottom part sealing apparatus in the case of using a rotary gate as a long span gate.

  Moreover, the operation of pushing the main body 15 in the longitudinal intermediate portion 14a of the watertight rubber 14 to the downstream side by following the displacement of the door body 5 to the downstream side of the skin plate 5a is performed by the compression coil springs 24a, 24b, 24c. Since it can be automatically performed by the elastic force, even when the gate body 3 (see FIGS. 5 and 6 (a), (b) and (c)) is rotated to change the angular posture of the door body 5, No special operation is required for the watertight rubber 14. Further, unlike the conventional bottom seal device 19 shown in FIG. 9, there is no need for an air supply / exhaust device, an air supply / exhaust line connecting the supply / exhaust device and the air bag 23 of the elastic body 20, etc. , The structure can be simple.

  Furthermore, the longitudinally intermediate portion 14a of the watertight rubber 14 is urged with a displacement stroke corresponding to the bending shape of the door body 5 due to water pressure, and both longitudinal ends of the watertight rubber 14 are provided. Since the spring member is not biased toward the door body 5, it is possible to prevent the possibility of excessive resistance when sliding the skin plate 5 a of the door body 5 with the watertight rubber 14. Therefore, the performance required for the rotation drive mechanism 7 (see FIG. 5) of the gate body 3 in the rotary gate can be suppressed.

  Each of the compression coil springs 24a, 24b, and 24c is in the state of a spring unit 29a, 29b, and 29c that is formed by connecting a plurality of base springs to the base plate 27 on the base end side and the tip plate 28 on the front end side. Since it is installed on the watertight rubber mounting seat 13, the above-described compression coil springs 24 a, 24 b and 24 c can be easily inserted between the longitudinal intermediate portion 14 a of the watertight rubber 14 and the watertight rubber mounting seat 13. Can be. Further, an elongated plate-like tip plate 28 is provided on the tip side of each of the compression coil springs 24 a, 24 b, 24 c so that the tip side plate 28 is brought into contact with the back side of the main body 15 of the watertight rubber 14. Therefore, the elastic force of each of the compression coil springs 24a, 24b, and 24c can be applied to the main body 15 of the watertight rubber 14 without being unevenly distributed in the longitudinal direction. The front end portion of the portion 15 can be uniformly crimped to the skin plate 5 a of the door body 5 in the longitudinal direction of the watertight rubber 14.

  Next, FIGS. 4 (a), (b), (c) and (d) show another embodiment of the present invention, and are shown in FIGS. 1 to 3 (a), (b), (c) and (d). In the same configuration, the compression coil springs 24a, the free height dimension of which becomes smaller in order of La> Lb> Lc between the main body portion 15 in the longitudinal intermediate portion 14a of the watertight rubber 14 and the watertight rubber mounting seat 13; Instead of the configuration in which the spring units 29a, 29b, and 29c each having 24b and 24c are arranged in order from the side close to the center position C in the radial direction, the spring units 29a, 29b, and 29c are interposed between the base plate 27 and the tip plate 28 that are arranged in parallel. A plurality of compression coil springs 24 having a required free height dimension are arranged at a predetermined interval in the longitudinal direction, and the base end portion of each of the arranged compression coil springs 24 is formed on the base plate 27 and the tip end portion thereof is arranged on the base plate 27. To the tip plate 28 Forming a spring unit 29 formed of a fixed by respectively welding. Furthermore, a liner 30a having a large thickness dimension Ta is provided below the spring unit 29 from the center position C in the radial direction between the main body 15 in the longitudinal intermediate portion 14a of the watertight rubber 14 and the watertight rubber mounting seat 13. 1 set of the arranged arrangement, 2 sets of arrangement of the liner 30b having a thickness Tb (Ta> Tb) smaller than the liner 30a below the spring unit 29, and only the spring unit 29 in order 2 They are arranged side by side.

  Other configurations are the same as those shown in FIGS. 1 to 3 (a), (b), (c), and (d), and the same components are denoted by the same reference numerals.

  According to the bottom seal device of the present embodiment, when each spring unit 29 is interposed between the main body 15 and the watertight rubber mounting seat 13 in the longitudinal intermediate portion 14a of the watertight rubber 14, the radial direction Since the liners 30a and 30b, whose thickness dimensions are gradually increased as they approach the center position C, are arranged together, the door 5 is in an initial state where no downstream deflection occurs. Of the spring units 29 compressed between the main body 15 of the longitudinal intermediate portion 14a of the watertight rubber 14 in contact with the skin plate 5a of the body 5 and the watertight rubber mounting seat 13, near the center position C in the radial direction In the spring unit 29, the compression amount from the free height dimension of each compression coil spring 24 is large, and each compression of the spring unit 29 increases as the distance from the center position C in the radial direction increases. Compression amount from the free height of yl spring 24 is successively reduced. Therefore, the displacement stroke applied to the main body portion of the longitudinal intermediate portion 14a of the watertight rubber 14 by the elastic force when the compression coil springs 29 are about to extend to the free height dimension is As it approaches the center position C, it increases.

  Therefore, also in the present embodiment, a state in which a displacement stroke corresponding to the bending shape when the door body 5 is bent by water pressure can be applied to the main body portion 15 of the longitudinal intermediate portion 14a of the watertight rubber 14. Thus, since the main body portion 15 of the intermediate portion 14a in the longitudinal direction of the watertight rubber 14 can be urged toward the door body 5, the same effect as in the above embodiment can be obtained. Furthermore, since all the compression coil springs 24 used can be made uniform, an effect of reducing costs can be expected.

  1 to 3 (a) (b) (c) (d) and FIG. 4 (b) (b) (c) (d) embodiment, the bottom of the channel 1 is dug. A watertight state between the door body 5 and the bottom of the water channel 1 is obtained by pressing the tip of the watertight rubber 14 attached to the pit 11 via the watertight rubber mounting seat 13 to the skin plate 5a of the door body 5. In the same manner as the bottom seal device 12 a shown in FIG. 8, the water-tight rubber 14 is placed on the skin plate 5 a side of the door body 5 via the water-tight rubber mounting seat 13. And attaching the tip of the watertight rubber 14 on the door body 5 side to the inner surface of the dug pit 11 at the bottom of the water channel 1 to maintain the watertight state between the door body 5 and the bottom of the water channel 1 It may be applied to the bottom sealing device. In this case, between the watertight rubber mounting seat 13 attached to the skin plate 5a side of the door 5 and the main body portion 15 in the longitudinal intermediate portion 14a of the watertight rubber 14 attached to the watertight rubber mounting seat 13, FIG. (A) (b) (c) (d) or FIG. 4 (b) (b) (c) As shown in (d), compression from the free height dimension as it approaches the center position C in the radial direction. The compression coil springs 24a, 24b, 24c or the compression coil spring 24 in a compressed state so as to increase in amount are interposed so that the center position in the radial direction with respect to the longitudinal intermediate portion 14a of the watertight rubber 14 is inserted. If a large displacement stroke can be applied in the vicinity of C, and a displacement stroke can be applied so as to decrease in order as the distance from the center position C in the span direction increases to the left and right sides. There.

  The present invention is not limited to the above-described embodiment. In the embodiments shown in FIGS. 1 to 3 (a), (b), (c), and (d), the compression coil springs 24a, 24b, and 24c are used. The performance as a spring, such as a free height dimension and a spring constant, is such that when the door body 5 of the rotary gate acts as a weir, the amount of deflection when the door body 5 bends downstream due to water pressure. It may be changed appropriately according to the situation. Similarly, in the embodiment shown in FIGS. 4 (a), (b), (c), and (d), the free height dimension of the compression coil spring 24, the performance as a spring such as a spring constant, and the compression coil spring 24 are shown. The thickness dimensions of the liners 30a and 30b for determining the amount of compression in the initial state of the liner 30b when the door body 5 of the rotary gate acts as a weir when the door body 5 bends downstream due to water pressure. You may change suitably according to the magnitude of quantity.

  If the longitudinally intermediate portion 14a of the watertight rubber 14 can be urged toward the door body 5 with a displacement stroke corresponding to the amount of bending when the door body 5 is deflected by water pressure, a spring member of a type other than the compression coil spring can be used. May be used.

  When the door body 5 acts as a weir, the water-tight rubber 14 provided on one side of the skin plate 5a of the door body 5 and the upstream end of the dug pit 11 provided on the bottom of the water channel 1, If the rotary gate is provided with a bottom seal device that is crimped to the other side to maintain a watertight state between the door body 5 and the bottom of the water channel 1, the bottom seal device regardless of the type of the rotary gate. As applicable.

  The dimensions in the expansion / contraction direction of the compression coil springs 24a, 24b, 24c in FIG. 3 (a), the width dimensions of the base plate 27 and the tip plate 28, the dimension in the expansion / contraction direction of the compression coil spring 24 in FIG. The thickness dimensions of the liners 30a and 30b, and the width dimensions of the liners 30a and 30b, the base plate 27, and the tip plate 28 are all convenient dimensions for illustration, and do not reflect actual dimensions. Absent. Of course, various modifications can be made without departing from the scope of the present invention.

1 shows an embodiment of a bottom seal device for a rotary gate according to the present invention, and is a schematic cut side view in the vicinity of the intermediate portion in the radial direction. FIG. It is a figure which expands and shows the part of the watertight rubber | gum in FIG. FIG. 1 shows a main part of the apparatus of FIG. 1, (a) is a diagram corresponding to the direction of arrows AA in FIG. 1, showing the arrangement of spring units arranged near the intermediate position in the span direction; (C) (d) is a figure which shows the state which is not compressed of a different spring unit, respectively. FIG. 4 shows another embodiment of the present invention, and (a), (b), (c), and (d) respectively correspond to FIGS. 3 (a), (b), (c), and (d). It is a front view which shows the outline of an example of a rotary gate. 5 shows the operation of the rotary gate of FIG. 5, (A) is a state in which the door body is fully opened, (B) is a state in which the door body is closed by a required amount to act as a weir, and (C) is a door body. It is a general | schematic cutting side view which shows the state which made fully closed, respectively. It is a general | schematic cutting side view which shows an example of the bottom part sealing apparatus of the rotary gate conventionally proposed. It is a general | schematic cutting side view which shows another example of the bottom part sealing apparatus of the rotary gate conventionally proposed. It is a general | schematic cut side view which shows another example of the bottom part sealing apparatus of the rotary gate conventionally proposed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waterway 2 Support pillar member 3 Gate main body 4 Support disk 5 Door body 5a Skin plate 6 Horizontal axis 11 Excavation pit 13 Watertight rubber mounting seat 14 Watertight rubber 24, 24a, 24b, 24c Compression coil spring (spring member)
27 Base plate 28 Tip plate 29, 29a, 29b, 29c Spring unit

Claims (5)

  The gate body consisting of the left and right support disks and the door body attached between the peripheral parts of the left and right support disks is rotated in the water channel so that the door body can be opened and closed. A watertight rubber mounting seat is provided in the span direction in the upstream end of the dug pit in a rotary gate provided with a dug pit for accommodating a door body arranged at the lowermost end of the gate body, A watertight rubber for closely contacting the skin plate of the door body is attached to the watertight rubber mounting seat, and a spring member is interposed between the longitudinal intermediate portion of the watertight rubber and the watertight rubber mounting seat, A rotary gate bottom seal device characterized in that a longitudinal intermediate portion of the watertight rubber can be constantly urged toward the skin plate side of the door body by an elastic force of a spring member.   The gate body consisting of the left and right support disks and the door body attached between the peripheral parts of the left and right support disks is rotated in the water channel so that the door body can be opened and closed. A watertight rubber mounting seat is installed in the radial direction at the required position of the skin plate of the door body in the rotary gate provided with a digging pit having an arc-shaped cross section for accommodating the door body arranged at the lowermost end of the gate body. And a watertight rubber for attaching the watertight rubber mounting seat to the inner surface of the pit pit, and a spring member interposed between the watertight rubber longitudinal intermediate portion and the watertight rubber mounting seat. And a bottom seal device for a rotary gate characterized in that the intermediate portion in the longitudinal direction of the watertight rubber can be constantly urged toward the inner surface side of the digging pit by the elastic force of the spring member.   The amount of compression of the spring member interposed between the middle portion in the longitudinal direction of the water-tight rubber and the water-tight rubber mounting seat is different, and a spring member with a larger amount of compression is disposed closer to the longitudinal center position of the water-tight rubber. The bottom seal device for a rotary gate according to claim 1 or 2, wherein:   The spring member is a compression coil spring, and a plurality of the spring members are arranged at a required interval in the longitudinal direction of the watertight rubber between the longitudinal intermediate portion of the watertight rubber and the watertight rubber mounting seat. The bottom seal device of the rotary gate as set forth in 1, 2 or 3.   The base end portions of the plurality of compression coil springs are attached to the base plate having a required length dimension at a required distance in the longitudinal direction so as to be perpendicular to the surface of the base plate, and the base end sides are mutually connected via the base plate. A spring unit is formed by connecting the tip portions of the plurality of compression coil springs connected to each other via a tip plate disposed on the tip side, a longitudinal intermediate portion of watertight rubber, a watertight rubber mounting seat, The bottom seal device for a rotary gate according to claim 1, 2, 3 or 4, wherein the spring unit is arranged in the longitudinal direction of the watertight rubber.

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