JP2019218719A - Water gate opening/closing device and opening/closing control method therefor - Google Patents

Abstract

To provide a water gate opening/closing device capable of making a door body stably descend by self-weight while keeping its equilibrium state.SOLUTION: A water gate opening/closing device 1 comprises a control device 42 that when a door body 3's width direction is inclined with respect to a water gate 2's width direction in making the door body 3 descend by self-weight via actuation of a main brake 35 and sub brake 36 of each opening/closing device body 15, uses second brake means 33 of an opening/closing device body 15 connected to the door body 3's one end in the width direction prior to the other for braking or releasing rotary motion of a second output shaft 31 extending from a second differential gear 27 to correct its inclined posture. Thereby, when the door body 3's width direction is inclined with respect to the water gate 2's width direction, smooth deceleration of the door body 3's one end in the width direction prior to the other is enabled and the door body 3's inclined posture can be corrected smoothly to a normal posture.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a floodgate opening / closing device that opens and closes a floodgate and lowers a door body by its own weight, and a method of controlling the timing of the floodgate opening / closing device.

  Conventionally, in order to open and close a water gate, usually, a motor is driven in an opening and closing direction to raise and lower a door body. However, due to a large-scale disaster, for example, a flood due to a storm surge, localized heavy rain, or a tsunami caused by an earthquake, etc., it is necessary to quickly close the floodgate by its own weight. Therefore, in order to reduce the closing time of the floodgate quickly, that is, to reduce the closing time of the floodgate, the floodgate opening and closing with a deadweight function of lowering the deadweight at a relatively high speed while adjusting the deadweight speed of the door body is used. Many devices are employed.

  In addition to this, in the conventional water gate opening and closing device, a motor that raises and lowers the door body that opens and closes the water gate, and a self-weight drop braking device that brakes the weight of the door body at a substantially constant speed when lowering the door body by its own weight, A water gate opening / closing device is adopted, in which a pair of opening / closing device main bodies provided with the above are independently arranged on both sides in the width direction of the door body. In this sluice gate opening / closing device, the opening / closing device main body is independently arranged as a pair on both sides in the width direction of the door body. In some cases, the width direction is inclined with respect to the width direction of the floodgate, and it was necessary to correct the inclination posture during the descent of its own weight.

  As a conventional technique to cope with this, Patent Document 1 discloses that when the door body is lowered by its own weight, the door body is controlled to include its own weight descent due to the operation of the self-weight descent braking device of each opening / closing device main body. When the width direction of the door body is inclined with respect to the width direction of the floodgate, turning on and off the electric motor of each switchgear body turns ON and OFF to correct the inclination posture while continuing the descent of the door body. An opening / closing control method is disclosed.

Japanese Patent No. 5936589

  However, in the invention of Patent Literature 1, when the width direction of the door body is inclined with respect to the width direction of the floodgate during the descent of the weight of the door body, the door body is connected to one end of the width direction of the door body that has fallen earlier. The turning drive of the electric motor in the switchgear body is turned on and off to rapidly reduce one end in the width direction to correct the inclination posture of the door body. Therefore, it was necessary to make improvements so that the inclination posture was corrected smoothly (smoothly). Moreover, in the invention of Patent Document 1, power supply is often interrupted in the case of the above-mentioned large-scale disaster or the like. In this case, the three-phase power supply is lost and the motor cannot be driven. When the body is lowered by its own weight by the operation of the pair of weight descent braking devices, it is not possible to maintain the equilibrium state of the door body, in other words, if the width direction of the door body is inclined with respect to the width direction of the floodgate, the inclination is It becomes difficult to correct the posture.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a water gate opening / closing device capable of stably lowering its own weight while maintaining the door body in an equilibrium state, and an object of providing a gate opening / closing control method thereof. .

(Aspect of the invention)
The aspects of the invention described below exemplify the configurations of the present invention, and are described separately in order to facilitate understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and, while taking into consideration the best mode for carrying out the invention, partially replaces, deletes, or deletes some of the components of each section. The components added with the above components are also included in the technical scope of the present invention.

(1) a rotating shaft that rotates with the weight of a door that opens and closes a water gate, a differential device to which rotation from the rotating shaft is transmitted, and one output shaft extending from the differential device, A main braking device for braking the rotational motion of the one output shaft, first brake means for braking and releasing the rotational motion of the one output shaft, and a second braking device connected to the other output shaft extending from the differential device; An opening / closing device main body including a sub-braking device for braking the rotational movement of the other output shaft and a second brake means for braking and releasing the rotational movement of the other output shaft is provided on both sides in the width direction of the door body. Independently paired,
When the door body is lowered by its own weight by the operation of the main braking device and / or the auxiliary braking device of each of the switchgear main bodies, when the width direction of the door body is inclined with respect to the width direction of the water gate, A control device for braking and releasing any one of the rotation shafts of the output shafts extending from the differential device by the first or second brake means of each switching device main body and correcting the inclination posture thereof. A water gate opening / closing device (corresponding to the invention of claim 1).
In the water gate opening / closing device described in the paragraph (1), for example, when the door body is lowered by its own weight by adjusting the descent speed by operating the main braking device and the sub braking device of each switching device body, the width direction of the door body is changed. When the gate is inclined with respect to the width direction of the floodgate, for example, the second brake means of the opening / closing device main body connected to one end portion in the width direction of the door body that has been previously lowered is controlled by a signal from the control device. By actuating, the rotational movement of the other output shaft extending from the differential device is braked and released, and the inclination posture of the door body can be corrected while continuing its own weight drop. As a result, the descent speed of one end in the width direction of the door body, which has been descending earlier, can be smoothly (smoothly) reduced. As a result, even when the door body is descending at its own weight at high speed, the door can be moved down. The body can be smoothly corrected from the inclined posture to the normal posture, and the responsiveness can be improved.

(2) The water gate opening / closing device described in (1), wherein the control device, the first brake means, and the second brake means are operated by a single-phase power supply or a DC power supply. Apparatus (corresponding to claim 2).
In the floodgate opening / closing device described in the item (2), even when the three-phase power supply (motor power supply) is lost, for example, in the event of a disaster, the control device, the first brake means and the second brake means are connected to the uninterruptible power supply or a small-sized power supply. It can be operated using a single-phase power source from a portable generator or a DC power source from a battery. Thereby, even if the three-phase power supply is lost, the door body can be stably dropped by its own weight while maintaining its balanced state without any problem.

(3) In the sluice gate opening / closing device described in (1) or (2), the control device is provided as a pair as a configuration of the switchgear main body, and the control devices are connected to each other by wireless communication. A floodgate opening / closing device, characterized in that:
In the floodgate opening / closing device described in the item (3), in the case of a large-scale disaster, a relatively long distance between the independent opening / closing device main bodies on each side in the width direction of the door body, in other words, between a pair of gate posts. Inability to transmit a signal due to, for example, cutting of a cable to be routed can be suppressed.

(4) a rotating shaft that rotates with the weight of the door body that opens and closes the water gate, a differential device to which rotation from the rotating shaft is transmitted, and one output shaft extending from the differential device, A main braking device for braking the rotational motion of the one output shaft, first brake means for braking and releasing the rotational motion of the one output shaft, and a second braking device connected to the other output shaft extending from the differential device; An opening / closing device main body including a sub-braking device for braking the rotational movement of the other output shaft and a second brake means for braking and releasing the rotational movement of the other output shaft is provided on both sides in the width direction of the door body. An open / close control method of a water gate opening / closing device which is independently arranged in a pair,
When the door body is lowered by its own weight by the operation of the main braking device and / or the auxiliary braking device of each of the switchgear main bodies, when the width direction of the door body is inclined with respect to the width direction of the water gate, A sluice gate, wherein the first or second brake means of each switching device main body brakes and releases one of the rotation shafts of the respective output shafts extending from the differential device, and corrects the inclination posture thereof. An opening / closing control method for an opening / closing device (corresponding to claim 3).
In the opening / closing control method of the water gate opening / closing device described in the item (4), for example, when the door body is lowered by its own weight by the operation of the main braking device and the sub braking device of each switching device body, the width direction of the door body is the width of the water gate. In the case where the door is inclined with respect to the direction, the second brake means is operated to brake and release the rotational movement of the other output shaft extending from the differential device of each switching device main body, and to continue the self-weight drop of the door body. Meanwhile, the inclination posture can be corrected. Thus, even while the door body is descending at its own weight at high speed, the door body can be smoothly corrected from the inclined posture to the normal posture, and the responsiveness can be improved.

  ADVANTAGE OF THE INVENTION According to the floodgate opening / closing apparatus and its opening / closing control method of this invention, when lowering a door body by its own weight, it can stably fall by its own weight, maintaining the equilibrium state.

FIG. 1 is a schematic diagram of a water gate opening / closing device according to an embodiment of the present invention. FIG. 2 is a diagram showing a control flow of a control device employed in the water gate opening / closing device according to the embodiment of the present invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIG. 1 and FIG.
As shown in FIG. 1, in a water gate opening / closing device 1 according to an embodiment of the present invention, a pair of opening / closing device main bodies 15, 15 described later are independently arranged on both sides in the width direction of the door body 3. In the floodgate opening / closing apparatus 1 according to the present embodiment, when the floodgate 2 is quickly dropped by its own weight at a high speed in order to quickly close the floodgate 2 with the floodgate 2 in a disaster or the like, the width direction of the floodgate 2 is changed. When the door 3 is tilted with respect to the width direction, the tilt posture can be corrected while the weight of the door body 3 continues to descend.

  Hereinafter, the water gate opening / closing device 1 according to the present embodiment will be described in detail. As shown in FIG. 1, a water gate opening / closing device 1 according to the present embodiment supports a door body 3 between a pair of left and right gate pillars 5, 5 constituting a water gate 2 so as to be able to move up and down. A pair of right and left sheaves 6 and 6 are disposed on the upper part of the door body 3. Wire rope winding drums 7, 7 are arranged above a pair of left and right gate posts 5, 5, respectively. An independent wire rope 10, 10 is wound around each of the sheaves 6, 6, respectively. One wire rope 10 is wound around the corresponding sheave 6, one end of the wire rope 10 is locked on the upper end of one of the portal posts 5, and the other end is wound around the corresponding wire rope winding drum 7. I have. Similarly, the other wire rope 10 is wound around the corresponding sheave 6, one end of the wire rope 10 is locked to the upper end of the other portal 5, and the other end of the wire rope 10 is It is wound around the taking drum 7. In the present embodiment, the wire rope 10 and the wire rope winding drum 7 are employed, but a chain and a sprocket may be employed.

  In the sluice gate opening / closing device 1 according to the present embodiment, as described above, a pair of opening / closing device main bodies 15, 15 independently arranged on both sides in the width direction of the door body 3, and an operation from an operator or the like are input. And an operation panel 45. The opening / closing main body device 15 includes a rotating shaft 17, first and second differential devices 19 and 27, an electric motor brake unit 25, first and second brake units 32 and 33, an electric motor 23, and a main braking device. 35, an auxiliary braking device 36, an opening degree deviation meter 40, and a control device 42. The rotation shaft 17 is integrally connected to the corresponding wire rope winding drum 7. A spur gear 17a is integrally connected to the rotating shaft 17. A spur gear 18a is integrally connected to an output shaft 18 extending from a first differential 19 described later. The spur gear 17a of the rotating shaft 17 and the spur gear 18a of the output shaft 18 mesh with each other, and the rotating shaft 17 and the output shaft 18 of the first differential device 19 transmit rotational torque to each other. Is done.

  The first differential 19 includes an output shaft 18, a first input shaft 21, and a second input shaft 22. A motor 23 is connected to the first input shaft 21 of the first differential 19. The electric motor 23 is connected to the operation panel 45 for transmitting a signal from the operation panel 45. The electric motor 23 is driven by a three-phase power supply (power supply). The driving of the electric motor 23 rotates the first input shaft 21. In the present embodiment, the electric motor 23 is employed, but a hydraulic motor or a hydraulic motor may be employed. The first input shaft 21 is provided with an electric motor brake means 25 between the first differential 19 and the electric motor 23. The motor brake means 25 is for restraining and releasing the rotational movement of the first input shaft 21. As the electric motor brake means 25, a hydraulic lifting brake, an electromagnetic brake, a disc brake, or the like is employed. The motor brake means 25 is operated by a three-phase power supply or a single-phase power supply. The electric motor brake means 25 is connected to the operation panel 45 for transmitting a signal from the operation panel 45. The operation panel 45 operates with a single-phase power supply or a DC power supply.

  The second input shaft 22 of the first differential 19 is connected to the second differential 27. The second differential device 27 receives the rotation of the second input shaft 22 accompanying the lowering of the weight of the door 3, and outputs the rotation to the first output shaft 30 and the second output shaft 31. The main braking device 35 is connected to the first output shaft 30 of the second differential device 27. The main braking device 35 controls the rotation speed of the first output shaft 30 to an appropriate speed, and employs a hydraulic brake (hydraulic pump) and a hydraulic brake (hydraulic pump) as a hydraulic brake, a centrifugal brake, a fan brake, and the like. Is done. The first output shaft 30 is provided with a first brake means 32 between the second differential device 27 and the main braking device 35. The first brake means 32 is for braking (restraining) and releasing the rotational movement of the first output shaft 30. As the first brake means 32, a hydraulic lifting brake, an electromagnetic brake, a disk brake, or the like is employed. The first brake means 32 is operated by a single-phase power supply or a DC power supply. The first brake means 32 is connected to the control device 42 for transmitting a signal from the control device 42.

  The auxiliary braking device 36 is connected to the second output shaft 31 of the second differential device 27. The sub-braking device 36 controls the rotation speed of the second output shaft 31 to an appropriate speed, and employs a hydraulic brake (hydraulic pump) and a hydraulic brake (hydraulic pump) as a hydraulic brake, a centrifugal brake, a fan brake, and the like. Is done. The second output shaft 31 is provided with a second brake means 33 between the second differential device 27 and the auxiliary braking device 36. The second brake means 33 is for braking (restraining) and releasing the rotational movement of the second output shaft 31. As the second brake means 33, a hydraulic lifting brake, an electromagnetic brake, a disk brake, or the like is employed. The second brake means 33 is operated by a single-phase power supply or a DC power supply. The second brake means 33 is connected to the control device 42 for transmitting a signal from the control device 42. In addition, the descent speed α when the door body 3 descends by its own weight by the operation of the main braking device 35 and the sub braking device 36 is lower than the descent speed β when the door body 3 descends by its own weight by the operation of the main braking device 35 alone. It is set large.

  The opening deviation meter 40 is in a state where the open area of the floodgate 2 is deviated right or left, that is, the door body 3 is not maintained in an equilibrium state, and the width direction of the door body 3 is in the width direction of the floodgate 2. This is to detect a state of being tilted. The opening deviation meter 40 is connected to the corresponding control device 42 for signal transmission to the corresponding control device 42. The opening deviation meter 40 and the control device 42 are connected by wire communication. Then, the opening degree deviation meter 40 measures the phase of the rotating shaft 17 of the switching device main body 15 and transmits the measurement result to the corresponding control device 42. The controller 42 calculates the phase difference between the rotating shafts 17 based on the shared phases of the rotating shafts 17 of the switchgear bodies 15, 15. Calculate the tilt posture. The opening degree deviation meter 40 is operated by a single-phase power supply or a DC power supply. Although substantially the same, the difference between the rotation speeds of the rotating shafts 17 of the switchgear bodies 15 may be measured to calculate the inclination posture of the door 3.

  The control device 42 controls the lowering operation of the door 3 when the door 3 is lowered by its own weight. In this embodiment, the control devices 42 are connected to each other by wireless communication. Note that the control devices 42 may be connected to each other by wired communication. The control device 42 is connected to the operation panel 45, the first brake means 32, and the second brake means 33 for signal transmission. The control device 42 is operated by a single-phase power supply or a DC power supply. The detailed control flow of the control device 42 will be described below.

Next, an opening / closing control method using the sluice gate opening / closing device 1 according to the present embodiment will be described based on FIG. 2 and referring to FIG. 1 as needed. Particularly, when a three-phase power supply is lost in a disaster or the like. Next, a method of controlling the opening and closing when the door 3 is lowered by its own weight will be described in detail.
Although the motor 23 does not function when the three-phase power supply is lost, the operation panel 45, the control device 42, the first brake means 32, the second brake means 33, and the opening deviation meter 40 are provided by an uninterruptible power supply or a small portable power supply. It can be operated with a single-phase power source of a generator or a DC power source of a battery.

  In step S <b> 1, the operator performs a switch operation or the like for lowering the door 3 by its own weight on the operation panel 45. Then, this signal is transmitted to the control devices 42, 42 of the opening / closing device main bodies 15, 15, and the self-weight drop of the door 3 is started. Subsequently, in step S2, the first and second brake means 32, 33 of each switching device main body 15 are released by a signal from the control device 42 of each switching device main body 15, and the first and second output shafts 30, 31 is released. As a result, the first and second output shafts 30 and 31 of the second differential 27 rotate due to the rotation of the second input shaft 22 of the first differential 19 due to the weight drop of the door 3. On the other hand, the first input shaft 21 of the first differential device 19 cannot rotate due to the motor 23 not functioning due to the loss of power, and the motor brake means 25 (when the power is not supplied, the rotation of the first input shaft 21 is restricted). It becomes.

  Then, in step S3, the lowering speed of the door body 3 is suppressed to an appropriate speed α by the operation of the main braking device 35 and the sub braking device 36, and the door body 3 descends by its own weight. That is, in the door body 3, the rotation speed of the first output shaft 30 of the second differential device 27 is appropriately suppressed by the main braking device 35, and similarly, the rotation speed of the second output shaft 31 of the second differential device 27 is changed. Since the rotation speed is appropriately suppressed by the auxiliary braking device 36, the descent speed is suppressed to an appropriate speed α, and the vehicle descends by its own weight.

  When the door body 3 is descending under its own weight at an appropriate descent speed α by the operation of the main braking device 35 and the sub braking device 36, the opening degree deviation meters 40, 40 always operate the opening / closing device main bodies 15, 15. The phases of the rotating shafts 17 are measured, and the measurement results are transmitted to the control devices 42, 42, respectively, and the measurement results are shared by the control devices 42, 42. Subsequently, in step S4, the phase difference between the rotary shafts 17, 17 of the switchgear main bodies 15, 15 based on the measurement results from the respective opening degree deviation meters 40 exceeds the reference value in each control device 42, and the door body If it is determined that the inclination correction of No. 3 is necessary, the process proceeds to step S5. On the other hand, in step S4, in each control device 42, the phase difference between the rotating shafts 17, 17 of the switching device main bodies 15, 15 based on the measurement results from the opening degree deviation meters 40 does not exceed the reference value, If it is determined that the inclination correction of the door 3 is not necessary, the process proceeds to step S9. In step S9, the door body 3 is landed. Subsequently, in step S10, when the landing of the door body 3 is detected by a detection sensor (not shown), the first and second switches of the opening / closing device main body 15 are received by a signal from the control device 42 of each switching device main body 15. The brake means 32 and 33 are actuated to restrict the rotational movement of the first and second output shafts 30 and 31 of the second differential 27. Then, in step S11, the self-weight drop of the door body 3 is completed.

  On the other hand, when the process proceeds to step S5 according to the determination result in step S4, in step S5, a signal from the control device 42 of the opening / closing device main body 15 connected to one end in the width direction of the door body 3 that has been previously lowered. Thus, the second brake means 33 is operated to brake the rotational movement of the second output shaft 31 of the second differential device 27. As a result, in step S6, one end in the width direction of the door body 3 that has been descending earlier is determined from the descent speed α by the operation of the main braking device 35 and the sub braking device 36, and only the operation of the main braking device 35 is performed. Is smoothly reduced to the descending speed β, and descends under its own weight. Subsequently, in step S7, each control device 42 determines whether or not the inclination correction of the door 3 has been completed based on the measurement result from each opening deviation meter 40. As a result, in step S7, when the control device 42 determines that the inclination posture of the door 3 has not been corrected, the process returns to the step before step S7. On the other hand, if it is determined in step S7 that each control device 42 has corrected the inclination posture of the door body 3, the process proceeds to step S8. Subsequently, in step S8, the second brake means 33, which was operated by a signal from the control device 42 of the opening / closing device main body 15 connected to one end in the width direction of the door body 3 which was previously lowered, is operated. Then, the braking of the second output shaft 31 of the second differential device 27 is released. As a result, one end in the width direction of the door body 3 immediately continues its own weight descent at an appropriate descent speed α. Thereafter, the process returns to before step S4.

  In the sluice gate opening and closing apparatus 1 according to the present embodiment, when the sluice gate 2 is opened and closed during normal times when three-phase power is supplied, the motor brake means 25 is released and a signal from the operation panel 45 is released. Only the rotational movement of the first input shaft 21 of the differential 1 is released (the rotational movement of the first and second output shafts 30, 31 of the second differential 27 depends on the first and second brake means 32, 33). State of being restrained by the action of. The doors 3 are moved up and down by driving the electric motors 23 in the opening and closing directions according to signals from the operation panel 45. In addition, when the door 3 is moved up and down, each control device 42 determines that the width direction of the door 3 is inclined with respect to the width direction of the floodgate 2 based on the measurement result from each opening deviation meter 40. In this case, the motor 23 of the opening / closing device main body 15 connected to one end in the width direction of the door body 3 that is moving up and down in advance is turned on / off by a signal from the operation panel 45, and the door body 3 is turned on / off. 3 is corrected for inclination.

  As described above, in the sluice gate opening / closing device 1 according to the embodiment of the present invention, even when the three-phase power supply is lost, the door body 3 is lowered at its own weight at a relatively high speed by the operation of the main braking device 35 and the sub braking device 36. Can be done. If each control device 42 determines that the width direction of the door 3 is inclined with respect to the width direction of the floodgate 2 based on the measurement result from each opening deviation meter 40, A second output shaft of the second differential device 27 by the second brake means 33 based on a signal from the control device 42 of the switchgear main body 15 connected to one end in the width direction which has been previously lowered; By braking and releasing the rotational movement of the door 31, the inclination posture of the door body 3 can be corrected while continuing its own weight descent. This makes it possible to smoothly reduce the descent speed of the one end in the width direction of the door body 3 that has been descending earlier, so that the door body 3 that is descending at its own weight at a relatively high speed can be normally moved from its inclined posture. The posture can be corrected smoothly.

  In addition, in the water gate opening / closing device 1 according to the embodiment of the present invention, the operation panel 45, the control device 42, the first and second brake means 32, 33, and the opening degree deviation meter 40 other than the electric motor 23 of each switching device main body 15 are provided. Since it operates with a single-phase power supply or a DC power supply, even if a three-phase power supply is lost, such as during a disaster, the use of an uninterruptible power supply, a single-phase power supply for a small portable generator, or a DC power supply for a battery Thus, the door 3 can be stably lowered by its own weight while maintaining its equilibrium state.

  Furthermore, in the water gate opening and closing device 1 according to the embodiment of the present invention, between the control devices 42 and 42 of the opening and closing device main bodies 15 and 15 which are independent on both sides in the width direction of the door body 3, in other words, a pair of gate posts 5 and 5. If a relatively long distance is connected by wire communication, it is assumed that the cable will be disconnected when a large-scale disaster occurs. In order to take measures against this, in the floodgate switchgear 1, the control devices 42, 42 of the switchgear main bodies 15, 15 are connected to each other by wireless communication so as to suppress signal transmission failure due to disconnection of the cable. I have to.

  In the sluice gate opening / closing device 1 according to the above-described embodiment, a hydraulic brake (a hydraulic pump or a hydraulic pump) may be employed as the main brake device 35, and a centrifugal brake or a fan brake may be employed as the auxiliary brake device 36. Alternatively, a centrifugal brake or a fan brake may be used for the main brake device 35, and a hydraulic brake may be used for the sub brake device 36. Further, both the main braking device 35 and the sub braking device 36 may employ a hydraulic brake, and the main braking device 35 and the sub braking device 36 may employ a centrifugal brake or a fan brake. In short, the combination of various brake devices in the main braking device 35 and the sub braking device 36 is not particularly limited.

  DESCRIPTION OF SYMBOLS 1 floodgate switchgear, 2 floodgates, 3 doors, 15 switchgear main body, 17 rotating shafts, 23 motors, 27 second differential, 30 first output shaft (one output shaft), 31 second output shaft (other) Output shaft), 32 first brake means, 33 second brake means, 35 main braking device, 36 sub braking device, 40 opening deviation meter, 42 control device

Claims (3)

A rotating shaft that rotates with the weight of the door that opens and closes the gate,
A differential device to which rotation from the rotation shaft is transmitted;
A main braking device that is connected to one output shaft extending from the differential device and that brakes a rotational movement of the one output shaft;
First brake means for braking and releasing the rotational movement of the one output shaft;
A secondary braking device coupled to the other output shaft extending from the differential device and braking the rotational movement of the other output shaft;
Second braking means for braking and releasing the rotational movement of the other output shaft;
, A pair of switchgear bodies each independently disposed on both sides in the width direction of the door body,
When the door body is lowered by its own weight by the operation of the main braking device and / or the auxiliary braking device of each of the switchgear main bodies, when the width direction of the door body is inclined with respect to the width direction of the water gate, A control device for braking and releasing any one of the rotation shafts of the output shafts extending from the differential device by the first or second brake means of each switching device main body and correcting the inclination posture thereof. Water gate opening and closing device.   The water gate opening / closing device according to claim 1, wherein the control device, the first brake unit, and the second brake unit are operated by a single-phase power supply or a DC power supply. A rotating shaft that rotates with the weight of the door that opens and closes the gate,
A differential device to which rotation from the rotation shaft is transmitted;
A main braking device that is connected to one output shaft extending from the differential device and that brakes a rotational movement of the one output shaft;
First brake means for braking and releasing the rotational movement of the one output shaft;
A secondary braking device coupled to the other output shaft extending from the differential device and braking the rotational movement of the other output shaft;
Second braking means for braking and releasing the rotational movement of the other output shaft;
A switchgear control method for a water gate switchgear, wherein a pair of switchgear main units provided with are independently arranged on both sides in the width direction of the door body,
When the door body is lowered by its own weight by the operation of the main braking device and / or the auxiliary braking device of each of the switchgear main bodies, when the width direction of the door body is inclined with respect to the width direction of the water gate, A sluice gate, wherein the first or second brake means of each switching device main body brakes and releases one of the rotation shafts of the respective output shafts extending from the differential device, and corrects the inclination posture thereof. An opening / closing control method for a switchgear.