JP4314228B2 - Gate opening / closing drive unit and gate device - Google Patents

Description

  The present invention relates to a unit for opening and closing a gate installed for the purpose of tide prevention in a harbor, a river, and the like, and a gate device.

  Conventionally, in harbors, rivers, and the like, horizontal gate devices have been installed at the entrances and exits of dykes for tide prevention. In general, a gate device travels in a horizontal direction (horizontal direction) on a rail laid on the ground to open and close an entrance / exit (gate). In order to improve the water tightness when the doorway is closed, usually a packing is provided at the lower end edge of the gate body so as to be in contact with the concrete placed on the ground and exhibit a sealing property. If the backing moves in contact with the concrete, the wear will be severe, so when running the gate device for opening and closing, the gate body is lifted upward to separate the backing from the concrete, and the gate body is closed after closing the doorway. It is designed to be lowered.

Conventionally, as a gate opening / closing drive device used in such a gate device, a device in which a drive device having wheels is moved in a vertical direction by a hydraulic jack attached to a gate body has been proposed (Patent Document 1). In addition, a device has been proposed in which a rotary drive device provided in a gate body is transmitted to a wheel using a transmission shaft and a bevel gear, and the wheel is moved up and down by a hydraulic cylinder attached to the gate body (Patent Document 2). ). In addition, a configuration has been proposed in which a cam is rotated by a conduction shaft and the gate body is moved in the vertical direction with respect to the wheel by rotation of the cam (Patent Document 3).
47-27784 Japanese Patent Publication 47-51173 Shokai 55-140521

  However, the conventional gate opening / closing drive device described above is large and requires a large space. In particular, there is a problem that the structure for driving the wheels to rotate and the drive device for moving the gate body in the vertical direction with respect to the wheels to be driven to rotate are large, and the gate opening / closing drive device and the gate device cannot be reduced in size and weight. there were.

  That is, as in Patent Documents 1 and 2, when the hydraulic jack is installed in the vertical direction with respect to the gate body and the wheel is directly moved in the vertical direction by the piston rod, the length of the hydraulic jack is reduced. Only the height of the gate opening / closing drive device becomes high. In addition, as in Patent Documents 2 and 3, a combination of a plurality of transmission shafts and bevel gears or a rotation of a cam results in an increase in the power transmission mechanism and a reduction in conduction efficiency. There is also the disadvantage that the overall efficiency is reduced.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a small and efficient gate opening / closing drive unit.

  A gate opening / closing drive unit according to the present invention is provided on a base, a wheel rotatably attached to the base, a fluid pressure motor attached to the base and rotationally driving the wheel, and the base. Elevating drive device for elevating and driving the gate body, and the elevating drive device is provided with an attachment plate for attaching the gate main body and two link rods rotatably connected by connecting shafts, respectively. The two link mechanisms, and the two link mechanisms, each of which is pivotally connected to the base, and the other end of each of the link mechanisms can be pivoted to the mounting plate. An attachment plate side shaft connected to the two connection shafts, and a fluid pressure cylinder attached between the two connection shafts to drive expansion and contraction. With plate is moved upward relative to the base, the configured such that the mounting plate each link mechanism bent moves down relative to the base when said fluid pressure cylinder is contracted.

  Preferably, at the extended end of the fluid pressure cylinder, the two link mechanisms are in a state exceeding the top dead center, and the gravity of the gate body acts on the fluid pressure cylinder in the extending direction. .

  Further, a stopper is provided so that the two link mechanisms do not open outward beyond the top dead center.

  In addition, in the pressure fluid unit that supplies the pressure fluid to the fluid pressure motor, a bypass circuit that short-circuits two ports of the fluid pressure motor when the pressure fluid unit does not operate is provided. Further, the pressure fluid unit is integrated.

  In the gate device according to the present invention, each of the mounting plates of the two gate opening / closing drive units described above is attached to a lateral frame provided on the gate body, and the two gate opening / closing drive units are connected to each other. Each wheel is configured to run on one rail.

  The gate opening / closing drive unit of the present invention is small and efficient. Therefore, the structure of the gate device can be simplified and reduced in weight.

  1 is a front view of a gate device 1 according to an embodiment of the present invention, FIG. 2 is a front view of a gate opening / closing drive unit 3 used in the gate device 1, and FIG. 3 is a left side view of the gate opening / closing drive unit 3. 4 is a front view showing an example of the internal arrangement of the control device, FIG. 5 is a hydraulic circuit diagram of the gate device 1, and FIG. 6 is a timing diagram showing an example of the operation of the gate device 1.

  In FIG. 2, with the center line of the wheel 32 as a boundary, the left half shows a state where the lifting drive device 37 is lowered, and the right half shows a state where the lifting drive device 37 is raised. In FIG. 3, the left half shows a state in which the lift drive device 37 is raised, and the right half shows a state in which the lift drive device 37 is lowered.

  In FIG. 1, the gate device 1 is provided so as to be movable in the horizontal direction (left and right direction in FIG. 1) along a rail RL laid on the ground at the entrance and exit of a concrete dike TB.

  That is, the gate device 1 includes a gate main body 11, two gate opening / closing drive units 12, 13, a cable bear 14, a control device 15, a hydraulic unit 16, and the like.

  The gate main body 11 is made of steel or the like, and a large number of frames 21a to 21e as structural members are provided around and at the center, and steel plates are attached to the surfaces thereof. is there. The width is wider than the opening width of the entrance and exit of the dike TB, and the height is slightly lower than the height of the dike TB.

  The gate opening / closing drive units 12 and 13 are attached to a frame 21e made of channel steel provided laterally at a position slightly below the central portion in the vertical direction of the gate body 11 at a predetermined distance from each other in the lateral direction. ing. In the gate opening / closing drive units 12, 13, each wheel 32 travels on one rail RL. These two gate opening / closing drive units 12 and 13 are symmetrical with each other but have the same function. Therefore, only one gate opening / closing drive unit 12 will be mainly described below.

  2 and 3, the gate opening / closing drive unit 12 includes a base 31, a wheel 32, a hydraulic motor 33, sprockets 34 and 35, a chain 36, a lift drive 37, and the like.

  The base 31 includes an upper plate 51, side plates 52 and 53, a bracket plate 54, and the like. These consist of metallic materials such as carbon steel or stainless steel. A shaft 55 is provided so as to penetrate between the two side plates 52 and 53, and is rotatably supported by a bearing (not shown). The wheel 55 and the sprocket 34 are attached to the shaft 55 so as to rotate together with a key. A hydraulic motor 33 is attached to the bracket plate 54, and a sprocket 35 is attached to the rotary shaft 33a so as to rotate integrally with a key. A chain 36 is spanned between the sprockets 34 and 35. Therefore, when the hydraulic motor 33 rotates, the wheel 32 rotates via the sprocket 35, the chain 36, the sprocket 34, and the shaft 55, and travels on the rail RL.

  The wheels 32 of the two gate opening / closing drive units 12 and 13 are controlled to rotate in the same direction at the same time. By adjusting the rotational direction and rotational speed of the hydraulic motor 33, the traveling direction and traveling speed of the gate device 1 are controlled.

  The elevating drive device 37 includes an attachment plate 61 for attaching the frame 21e of the gate body 11, two brackets 62 and 63 attached to the attachment plate 61, two brackets 64 and 65 attached to the upper plate 51, and a connecting shaft. One end of each of the two link mechanisms LK1 and LK2 and the two link mechanisms LK1 and LK2 including two link rods 66, 67, 69, and 70 that are rotatably connected by 68 and 71, respectively, is on the base side. The base side shaft portions 72 and 73 that are rotatably connected to the brackets 64 and 65, and the mounting plate side shaft portion 74 that rotatably connects the other end portions to the brackets 62 and 63 on the mounting plate side. , 75. A hydraulic cylinder 76 that is extended and retracted is attached between the two connecting shafts 68 and 71.

  The hydraulic cylinder 76 includes a cylinder tube 81, a cover and a piston (not shown), a piston rod 82, a front end fitting 83, a rear end fitting 84, and the like. Piston rod 82 extends or contracts by supplying and discharging pressure oil to and from two ports (not shown). A connecting shaft 68 passes through the tip fitting 83, and thereby the tip fitting 83 and the link mechanism LK1 are rotatably connected. The connecting shaft 71 passes through the rear end fitting 84, and thereby the rear end fitting 84 and the link mechanism LK2 are rotatably connected.

  Therefore, when the hydraulic cylinder 76 extends, as shown in the right half of FIG. 2 and the left half of FIG. 3, the link mechanisms LK1 and LK2 extend and the mounting plate 61 moves upward relative to the base 31. When the hydraulic cylinder 76 contracts, the link mechanisms LK1 and LK2 bend around the connecting shafts 68 and 71 as shown in the left half of FIG. Move downward.

  However, when the extended end of the hydraulic cylinder 76, that is, the piston rod 82 is fully extended, as shown in the right half of FIG. 2, the two link mechanisms LK1, LK2 are in a state beyond the top dead center, that is, the mounting plate 61. Descends and the link mechanisms LK1 and LK2 extend from the bent state and pass through a straight straight line, and are slightly bent outward in the opposite direction. In this state, the load applied to the mounting plate 61, that is, the gravity of the gate body 11 acts in the direction of extending the hydraulic cylinder 76. However, since the hydraulic cylinder 76 is in the fully extended state, the hydraulic cylinder 76 does not extend any further and eventually stabilizes in that state. In this state, in order to lower the gate body 11, the hydraulic cylinder 76 must be driven in the contracting direction, and the link mechanisms LK1 and LK2 must be moved so as to cross the top dead center. That is, at the extended end of the hydraulic cylinder 76, the two link mechanisms LK1, LK2 and the hydraulic cylinder 76 constitute a kind of toggle mechanism, and the pressure oil leaks even if no pressure oil is supplied to the hydraulic cylinder 76. Even if it exists, the raising position of the gate main body 11 is stably maintained. It should be noted that the dimensions of the hydraulic cylinder 76 and the dimensions and arrangement of the link mechanisms LK1 and LK2 are set so that these actions are performed.

  A single gate opening / closing drive unit 12 alone does not uniquely determine the position and orientation of the mounting plate 61 with respect to the base 31. For example, the mounting plate 61 may be inclined instead of horizontal. When the gate opening / closing drive units 12 and 13 are attached to the frame 21e of the gate body 11, the posture of the gate body 11 is parallel to the rail RL, so that the posture of the mounting plate 61 is uniquely determined as a horizontal posture. That is, when the two gate opening / closing drive units 12 and 13 are attached to the gate body 11 without using a special guide member, the elevation drive device 37 operates normally.

  It should be noted that stoppers 78 and 79 with which the outer ends of the link rods 67 and 70 come into contact when the piston rod 82 is fully extended or before it is extended are provided. The stoppers 78 and 79 restrict the link mechanisms LK1 and LK2 from moving further outward, and the operations of the two link mechanisms LK1 and LK2 are further stabilized.

  In FIG. 4, the control device 15 is configured such that a controller 111, an electromagnetic switch group 112, a rectifier circuit 113, a charger 114, a battery 115, and the like are incorporated in a rectangular parallelepiped casing 110 made of a steel plate.

  The control device 15 supplies DC power to the hydraulic unit 103 and supplies DC power for operating the solenoid valve at an appropriate timing. That is, normally, an AC power supply (commercial power supply) of AC 100 volts or 200 volts is rectified by the rectifier circuit 113 and converted to DC 12 volts, and this DC 12 volts operates and supplies this to the load. In the event of a power failure, the battery 115 is operated by DC 12 volts and supplied to the load. The battery 115 has a capacity sufficient to allow the operation for closing the gate device 1 at least once with sufficient margin, and is charged on a daily basis by the charger 114.

  The controller 111 controls the electromagnetic switch group 112 as necessary, and turns on / off the hydraulic unit 16, protects against overcurrent, controls the solenoid valve, manually operates, outputs an alarm, from a central command room (not shown). Controls the operation of the remote control. The controller 111 can be operated by, for example, a key switch carried by a regular operator. In the control of the alarm output, for example, when an operation for closing the gate main body 11 is performed or when the gate main body 11 is in a closed state, a rotating lamp or the like is lit, and an alarm sound is emitted at the same time. In addition, the controller 111 controls the entire control device 15 and the gate device 1.

  As described above, the control device 15 is operated by two independent power sources, that is, the AC power source and the battery 115, and reliably and economically with respect to opening and closing of the gate device 1 in an emergency in both a normal time and a power failure. Can respond.

  The hydraulic unit 16 is configured by integrally attaching a hydraulic tank, a motor M, a hydraulic pump P, electromagnetic valves V1 to V3, a hand pump SP2, and the like. The motor M is a direct current motor driven by direct current 12 volts. The hydraulic unit 16 supplies hydraulic pressure to the hydraulic motor 33 and the hydraulic cylinders 76 and 77.

  As shown in FIG. 5, the hydraulic unit 16 rotationally drives the hydraulic pump P by a motor and generates a hydraulic pressure of about several MPa to several tens of MPa, for example, about 7 MPa, and the hydraulic output is supplied via a check valve. It is connected to the circuit of the manifold 104. When the electromagnetic valve V1 is switched, the hydraulic motor 33 rotates in the forward direction or the reverse direction, and when the electromagnetic valve V2 is switched, the hydraulic cylinder 76 extends or contracts.

  Further, the hydraulic cylinder 77 is expanded or contracted by switching the electromagnetic valve V3. The hydraulic cylinder 77 is attached to the gate main body 11 or the dike TB, and when the gate main body 11 is closed, a grip for holding the end of the dike TB or the gate main body 11 so that the gate main body 11 does not open again. Is activated.

  Further, the manual pump SP2 is provided, and the manual pump SP2 is manually operated in a state where the manual valve SV2 is switched, so that the hydraulic cylinder 76 can be supplied with hydraulic pressure and operated.

  As shown in FIG. 5, the circuit of the hydraulic motor 33 is provided with a bypass solenoid valve V4. The solenoid valve V4 bypasses both ports of the hydraulic motor 33 when not energized, and cancels the bypass when energized. That is, when the hydraulic motor 33 is operated by the control of the control device 15, the solenoid valve V4 is turned on, the bypass by this is released, normal operation is performed, and the control device 15 does not operate for some reason. The solenoid valve V4 is turned off and the two ports of the hydraulic motor 33 are bypassed, and the gate body 11 can be manually opened and closed by pushing the gate body 11 manually to rotate the hydraulic motor 33. . In this way, in an emergency, even if it is an emergency, an operation by hand can be easily performed.

  As shown in FIG. 5, a spare hydraulic unit 16Y including a motor M and a hydraulic pump P is provided. The hydraulic tank of the hydraulic unit 16Y is also used as the hydraulic tank of the main hydraulic unit 16. The output line and the return line of the spare hydraulic unit 16Y are connected in parallel with the output line and the return line of the main hydraulic unit 16, and the hydraulic pressure drops due to a failure of the main hydraulic unit 16 or the like. In addition, the spare hydraulic unit 16Y is operated.

  Although not shown, the circuits of both hydraulic cylinders 76 are provided with a flow control for adjusting the flow rate. Specifically, a meter-out flow rate adjustment circuit in which a throttle valve and a check valve are arranged in parallel on a pipe line leading to each port of each hydraulic cylinder 76 adjusts the discharge flow rate from each port. So connected.

  Further, the two pilot check valves provided in the output circuit of the electromagnetic valve V2 may be omitted.

  As shown in FIG. 6, normally, the gate body 11 is stopped in a raised state, and when a storm surge warning or the like is issued, the hydraulic unit 16 is operated (T1) and the hydraulic motor 33 is rotated to rotate the gate body. 11 is run and the gate body 11 is closed. When the gate body 11 is closed, the hydraulic motor 33 is stopped (T2), and the hydraulic cylinder 76 is operated to lower the gate body 11 (T3). As a result, the gate body 11 closes the opening of the levee TB almost completely in a watertight manner. Although illustration is omitted, in this state, the hydraulic cylinder 77 operates to grip and fix the end of the gate body 11.

  When the storm surge warning is released, the state in which the end of the gate body 11 is gripped by the hydraulic cylinder 77 is released, and then the hydraulic cylinder 76 is operated to raise the gate body 11 (T4), and the hydraulic motor 33 is reversed. The gate body 11 is caused to travel by rotating in the direction (T5), and the gate body 11 is opened (T6).

  According to the above-described embodiment, the gate opening / closing drive units 12 and 13 are small in size, and without using a large number of transmission shafts and gears, the wheels 32 and the link mechanisms LK1 and the hydraulic mechanisms 33 and the hydraulic cylinders 76 are used. Since 2 is driven directly, the conduction efficiency is good. In particular, the hydraulic cylinder 76 is arranged in the horizontal direction and is converted into vertical movement by the link mechanisms LK1 and 2, so that a large driving force can be obtained with a small and simple structure, and the gate can be opened and closed in a small space. Drive units 12 and 13 can be installed. Also, maintenance is easy. Further, as described above, since the two link mechanisms LK1 and LK2 exceed the top dead center at the extended end of the hydraulic cylinder 76, the raised position of the gate body 11 is stably maintained.

  In the above embodiment, the two link mechanisms LK1 and LK2 may be configured to be the top dead center at the extended end of the hydraulic cylinder 76. Although two gate opening / closing drive units 12 and 13 are arranged, three or more gate opening / closing drive units may be arranged. In the control device 15, the control of the hydraulic unit 16 and the electromagnetic valve may be performed by the operation of the operator in the field, or may be automatically performed by a remote command from the central command room.

  In the above-described embodiment, the hydraulic motor 33 and the hydraulic cylinder 77 operate reliably without any problem even if they are immersed in rainwater or seawater. High nature. By making the hydraulic motor 33 and the hydraulic cylinder 77 seawater resistant using stainless steel or the like, the reliability is further improved. Further, by adopting such seawater resistance specifications, it is possible to omit a sealing structure for waterproofing the gate opening / closing drive units 12 and 13 that has been provided in the past.

  In the embodiment described above, the electromagnetic valve V4 for bypassing the hydraulic motor 33 is provided so that the gate body 11 can be opened and closed manually, but instead of or together with this, the hydraulic motor 33 is rotated. The hand pump may be provided separately. In that case, the hydraulic motor 33 is rotated by operating the hand pump without bypassing.

  In the embodiment described above, the control device 15 and the hydraulic unit 16 are arranged in the vicinity of the levee TB. However, a hydraulic unit for supplying pressure oil to each gate opening / closing drive unit 12, 13 may be provided integrally with each gate opening / closing drive unit 12, 13. By doing so, the hydraulic piping between the hydraulic unit and the gate opening / closing drive units 12 and 13 can be shortened, and can also be a fixed piping. For example, only electrical wiring can be used. In addition to hydraulic pressure, water pressure or the like can be used.

  In the above-described embodiment, the control device 15 is operated by two independent power sources including an AC power source and a battery, and DC power is supplied to the motor M of the hydraulic unit 16. However, there are two independent hydraulic units that are operated by AC power supply or DC power supply respectively, and when the AC power supply is not blackout, the hydraulic power unit is operated by AC power supply, When the hydraulic pressure decreases, it may be detected and the hydraulic unit using the DC power supply may be operated.

  In addition, the structure, material, shape, size, number, etc. of the whole or each part of the gate body 11, the gate opening / closing drive units 12, 13, the link mechanisms LK1, 2 or the gate device 1 are appropriately changed in accordance with the spirit of the present invention. can do.

  The present invention can be used for opening and closing driving of a tide gate and other laterally extending gates.

It is a front view of the gate apparatus which concerns on embodiment of this invention. It is a front view of the gate opening / closing drive unit used for the gate apparatus. It is a left view of a gate opening / closing drive unit. It is a front view which shows the example of arrangement | positioning inside a control apparatus. It is a hydraulic circuit diagram of a gate device. It is a timing diagram which shows the example of operation | movement of a gate apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gate apparatus 11 Gate main body 12, 13 Gate opening / closing drive unit 15 Control apparatus 16, 16Y Hydraulic unit 31 Base 32 Wheel 33 Hydraulic motor (fluid pressure motor)
37 Lifting drive device 61 Mounting plate 66, 67, 69, 70 Link rod 68, 71 Connection shaft 72, 73 Base side shaft portion 74, 75 Mounting plate side shaft portion 76 Hydraulic cylinder (fluid pressure cylinder)
78, 79 Stopper 110 Housing 111 Controller 112 Electromagnetic switch group 113 Rectifier circuit 114 Battery charger 115 Battery LK1, Link mechanism RL Rail

Claims (6)

The base,
A wheel rotatably mounted on the base;
A fluid pressure motor attached to the base for rotationally driving the wheel;
An elevating drive device provided on the base for elevating and driving the gate body,
The lifting drive is
A mounting plate for mounting the gate body;
Two link mechanisms each comprising two link rods rotatably connected by a connecting shaft;
About two said link mechanisms, the base side axial part which connects each one end part to the said base so that rotation is possible, and the attachment plate side axial part which connects each other end part to the said mounting plate so that rotation is possible When,
A fluid pressure cylinder attached between the two connecting shafts and driven to extend and contract,
When the fluid pressure cylinder extends, the link mechanisms extend and the attachment plate moves upward relative to the base. When the fluid pressure cylinder contracts, the link mechanisms bend and the attachment plate moves. Configured to move downward relative to the base,
A gate opening / closing drive unit characterized by that. At the extension end of the fluid pressure cylinder, the two link mechanisms are in a state exceeding the top dead center, and the gravity of the gate body is configured to act on the fluid pressure cylinder in the extension direction.
The gate opening / closing drive unit according to claim 1. A stopper is provided to prevent the two link mechanisms from opening outward beyond the top dead center.
The gate opening / closing drive unit according to claim 1 or 2. In the pressurized fluid unit that supplies pressurized fluid to the fluid pressure motor, a bypass circuit that short-circuits two ports of the fluid pressure motor when the pressure fluid unit does not operate is provided.
The gate opening / closing drive unit according to claim 1. The pressure fluid unit is integrated,
The gate opening / closing drive unit according to claim 4. Each of the mounting plates of the two gate opening / closing drive units according to any one of claims 1 to 5 is attached to a lateral frame provided in the gate body,
Each wheel of the two gate opening / closing drive units is configured to run on one rail,
A gate device characterized by that.