JPH10102959A - Rotary gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a gate main body to smoothly rotate during opening or closing movement, to prevent inadvertent rotation of the gate main body when it is opened or closed, and to enable the gate main body to be opened and closed even by remote control. SOLUTION: An outer cylinder 3 to be provided on a gate main body is rotatably placed on the outer periphery of an inner cylinder 6 fixed perpendicularly on a base. Collar rings 15a, 15b are provided respectively on the top and bottom of the outer periphery of the outer cylinder 3 while securing clearance between each of them and the inner peripheral surface of the outer cylinder 3. A bearing 32 for engagement with a fulcrum shaft 13 held at the center of the upper end of the outer cylinder 3 is slidably provided on the upper end of the inner cylinder 6, and a rotary actuator 23 which operates in conjunction with a hydraulic pump via two main conduit pipes 20, 21 is provided at the upper end of the inner cylinder 6, and the outer cylinder 3 is rotated about the fulcrum shaft 13 by the rotary actuator 23. The rotary actuator is preferably of the oscillating type with a rotating angle of 90 deg. to 270 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary gate which can be freely opened or closed manually or remotely by a rotary gate installed in a relatively wide opening such as a factory or a public facility. .

[0002]

2. Description of the Related Art The applicant of the present invention has adopted a relatively large gate installed in a wide opening and disclosed in Japanese Patent Application Laid-Open No. 7-62963 without using a door wheel or a hanging wire.
A gate-type rotary gate that can be made compact is proposed. This gate-post rotating gate comprises an inner cylinder for vertically fixing a gate supporting the gate body to the ground, an outer cylinder for rotatably covering the inner cylinder, and fixing to the gate body. A support shaft installed vertically in the center of the and a bearing fixed to the upper end of the inner cylinder and receiving the lower end of the support shaft,
It is rotated about the support shaft at the time of opening and closing, and has already been put to practical use, having advantages such as excellent appearance in design and excellent strength.

[0003]

In this gate, the load of the gate body is received by the abutment between the fulcrum shaft and the bearing via the outer cylinder and the contact of the side surface of the outer cylinder with the side surface of the inner cylinder. The structure can be simplified because it is rotatable about the fulcrum shaft.However, when the outer cylinder is rotatably provided on the inner cylinder, the fulcrum shaft provided on the outer cylinder is integrally provided on the inner cylinder. It is configured to engage with a bearing fixed to the plate.
However, when the gate body having a relatively long opening width and a heavy weight is fixed to the outer cylinder, a load in the base direction acts on the distal end side of the gate body when the gate is held in the open or closed state. When the fulcrum shaft of the cylinder is engaged with the bearing fixed to the inner cylinder, a rotational moment centering on the lower side of the outer cylinder acts, and the inner cylinder may be subjected to a large weight toward the gate body and fall down. There are problems that need to be solved practically.

In view of such circumstances, the present invention has a very simple structure and can be smoothly opened and closed even with a large gate body, and the gate body is inadvertently rotated in the open or closed state. There is no revolving gate to offer.

[0005]

According to a first aspect of the present invention, there is provided a gate body provided on an outer peripheral portion of a cylindrical inner cylinder fixed vertically on a base. A cylindrical outer cylinder is rotatably disposed, and a color ring is provided above and below the outer peripheral portion of the inner cylinder while maintaining a clearance between the outer cylinder and the inner peripheral surface of the outer cylinder. A rotary gate configured to engage a bearing slidably provided at an upper end portion of the inner cylinder with a fulcrum shaft held at the center of the portion to rotate an outer cylinder about the fulcrum shaft.

According to a second aspect of the present invention, a cylindrical outer cylinder provided on a gate body is rotatably disposed on an outer peripheral portion of a cylindrical inner cylinder fixed vertically on a base. And a color ring provided with clearance between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the outer cylinder, and a fulcrum shaft held at the center of the upper end of the outer cylinder. When rotating the outer cylinder around the fulcrum shaft by engaging with a bearing slidably provided at the upper end of the inner cylinder, a rotary actuator interlocked with a hydraulic pump is provided at the upper end of the inner cylinder, and the rotary actuator The rotary gate is configured to rotate the outer cylinder.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a rotary gate comprises a cylindrical inner cylinder fixed vertically to the ground, and a cylindrical outer cylinder shorter than the inner cylinder rotatably covering the inner cylinder. And a gate body fixed to the outer cylinder.

The outer cylinder fixed to one side surface of the gate main body has a diameter capable of securing a predetermined clearance between the outer cylinder and the inner cylinder when fitted to the inner cylinder. A bracket is integrally fixed to the upper part in the cylinder between the opposing inner walls, and a fulcrum shaft is held vertically so that a tip portion protrudes downward from the center of the bracket. In this case, the height of the fulcrum shaft can be finely adjusted within a predetermined range by forming the fulcrum shaft with a shaft member having a thread formed on the outer peripheral portion and providing a tapped hole at the center of the bracket.

The other inner cylinder has a lower end fixed to a base plate for vertically fixing the inner cylinder on a base by means of welding or the like. The upper end of the inner cylinder is connected to the fulcrum shaft. The corresponding bearings are slidably provided. This bearing is basically mounted on the upper surface of a support plate fixed between the opposed inner peripheral surfaces of the upper end of the inner cylinder, but the bearing slides substantially toward the upper end of the inner cylinder. If held freely,
There is no restriction on how it is retained.

A color ring having a predetermined thickness is integrally fixed to the upper and lower outer peripheral surfaces of the inner cylinder.
This coloring has a slightly smaller thickness than the clearance formed between the inner cylinder and the outer cylinder, and has a slight gap between the outer peripheral surface of the coloring and the inner peripheral surface of the outer cylinder. When the gate is opened or closed, the entire load of the gate body acts only on the fulcrum shaft. When the gate is open or closed and stationary, the load of the gate body acts and the bearing slides slightly toward the gate body. In addition, the outer peripheral surface of each color ring is in contact with the outer cylinder to keep the gate body in a horizontal state at all times, thereby preventing the gate body from falling down and preventing the gate body from being carelessly rotated.

The fulcrum shaft has a spherical convex portion at the distal end surface thereof, and the bearing engaged with the fulcrum shaft has a central concave portion at the upper surface thereof for smooth rotation. Can be more reliably engaged.

Although there is no particular limitation on the structure of the gate body fixed to the outer cylinder, the length of the gate body installed in the frontage having a relatively wide opening width is an extremely long frame-like body of about 3 to 6 m. In general, the upper and lower frame bars are connected by a number of decorative members such as vertical lattices, but such decorative members are not limited to vertical lattices but have various designs such as mesh-like lattices and panels. can do. There is no particular limitation on the means for fixing the gate body to the outer peripheral portion of the outer cylinder, but generally, mounting brackets are integrally provided on the outer peripheral portion of the outer cylinder and on the upper and lower sides of the gate main body, respectively. The mounting brackets can be fixedly connected to each other by bolts and nuts.

The rotary gate having such a basic structure is characterized in that when the gate body is opened and closed by rotating the outer cylinder about a fulcrum shaft which engages with a bearing provided on the inner cylinder, the outer cylinder is hydraulically operated. The rotation is performed using a hydraulic actuator composed of a motor and a hydraulic pump. There is no particular limitation on the hydraulic motor to be used, but an oscillating actuator (hereinafter, referred to as a “rotary actuator”) that can rotate the output shaft at a relatively low speed and can reduce the size of the entire device. ) Are preferably used. The rotation angle of the rotary actuator may be selected in a range from 90 ° to 270 ° according to the opening / closing degree of the gate body.

The other hydraulic pump is a vane pump whose discharge amount can be easily changed by changing the amount of eccentricity between the rotor and the cam ring, and is preferably a pump that can be used at a pressure of about 150 kg / cm ² or less. The type of pump is not limited to the vane pump. Since the hydraulic pump and the rotary actuator are linked by two main pipeline pipes for suction and discharge, the installation location of the hydraulic pump is not limited and remote control is possible.

A switching valve is provided in each of two main pipes connecting the hydraulic pump and the rotary actuator, and the main pipes between the switching valves and the rotary actuator are connected by a side pipe. However, by providing a switching valve in the middle of the bypass pipe, the gate body can be opened and closed in various ways. That is, by closing the switching valve of the bypass pipe and opening the switching valves of the main pipeline pipe, the switching valve can be used as a normal actuator.

On the other hand, the gate body can be manually opened and closed by closing all the switching valves of the main pipe and opening the switching valves of the side pipes. The drive of the actuator can be locked by closing both the switching valves of the two main pipes and the side pipes.

Each of the on-off valves is configured to operate even with a battery, and when the main power is cut off due to a power failure or the like, the on-off valve of the main pipe is closed by the battery and the on-off valve of the bypass pipe is closed. By setting the opening to an appropriate degree, the rotary actuator can be used as a shock absorber.

[0018]

According to the rotary gate of the present invention, when the outer cylinder is rotatably fitted to the inner cylinder fixed on the base via the fulcrum shaft, the bearing engages with the fulcrum shaft held by the outer cylinder. Is slidably held at the upper end of the inner cylinder, so the weight of the gate body acts on the outer cylinder, and when the outer cylinder tilts toward the gate body, the bearing is always shifted to the gate body side from the center and the outer cylinder To prevent the gate from falling down due to the force that holds the
The color ring prevents the gate body in the open or closed state from being accidentally rotated by contacting the outer cylinder. Further, since the rotary gate of the present invention rotates the outer cylinder about the fulcrum shaft by the rotary actuator interlocking with the hydraulic pump, the gate can be opened and closed by remote control.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a rotary gate according to an embodiment of the present invention. As shown in FIG. 1, the rotary gate 1 of the present invention forms a horizontally long frame by connecting upper and lower and left and right frame bars, and connects a plurality of grids between the upper and lower frame bars of the frame body. Gate body 2 and gate body 2
The outer cylinder 3 fixed to the one side end by the mounting bracket 4
And fixed vertically to the base plate 5 fixed to the ground B,
And an inner cylinder 6 for rotatably holding the outer cylinder 3. In the figure, reference numeral 7 denotes a pillar for door stop which comes into contact with the other end of the gate body 2 and is vertically fixed to the ground B by the base plate 5.

The inner cylinder 6 constituting the rotary gate 1 is made of a metal cylindrical body having a predetermined diameter and length, and a base plate 5 is integrally fixed to a base end thereof. The plate 5 is held vertically on the ground B by fixing it with bolts 9 to a concrete base 8 formed on the ground B.

The outer cylinder 3 rotatably held by the inner cylinder 6
Is made of a metal cylinder having a diameter larger than that of the inner cylinder 6 and having a slightly shorter length. A cap 10 is provided at a tip end of the metal cylinder, and the inner peripheral surface of the outer cylinder 3 and the inner cylinder 6 The clearance between the outer peripheral surface and the outer peripheral surface is about 37 mm, and the difference in length between the outer cylinder 3 and the inner cylinder 6 is about 40 mm. As shown in FIG. 2, a bracket 11 made of a plate-like body having a required thickness is fixed to the upper end of the outer cylinder 3 by welding. A tap hole 12 is formed in the center of the bracket 11 so as to penetrate vertically, and a fulcrum shaft 13 made of a bolt is mounted in the tap hole 12 so that the tip end protrudes from the lower surface of the bracket 11. Elongated holes 14 are formed in portions facing each other with the hole 12 interposed therebetween so as to penetrate vertically.

The outer cylinder 3 is, as apparent from FIG.
The inner ring 3 is rotatably fitted to the outer peripheral portion thereof with a required clearance. Color rings 15 a and 15 b having a predetermined thickness are provided above and below the outer peripheral surface of the inner cylinder 3. It is fixed so as to have the required clearance with the surrounding surface,
The contact portion between the inner cylinder 6 and the outer cylinder 3 is limited to a fulcrum shaft 13 and the color rings 15a and 15b described later, and the rotation of the outer cylinder 3 is further ensured. Part of the rings 15, 15b contacts the inner peripheral surface of the outer cylinder 3,
The gate main body 2 is configured to prevent inadvertent rotation.

When rotating the outer cylinder 3 around the inner cylinder 6, the inner peripheral portion of the outer cylinder 3 and the inner cylinder 6 facing the inner peripheral portion are rotated.
The stopper members 16 and
17 are integrally fixed to each other so that the outer cylinder 3 does not rotate more than a predetermined angle. However, the outer cylinder 3 is not necessarily indispensable as long as a rotary actuator described later rotates in a certain range. The configuration is not limited only to the embodiment.

On the other hand, a load receiving ring 18 penetrating vertically and having an inner peripheral portion at the upper end as a thrust bearing is fixed inside the upper end of the inner cylinder 6.
Inside the electric hydraulic pump 19 and two main pipeline pipes 2
The rotary actuator 23 linked at 0 and 21 is fixed.

The drive shaft 24 of the rotary actuator 23 is integrally mounted with a drive wheel 26 having a ring-shaped recess for engagement at the center of the upper surface and having a pair of cam followers 25, 25 at opposing positions. At the same time, an intermediate wheel 27 is rotatably mounted via a bush 28 in a ring-shaped recess provided on the upper surface of the drive wheel 26.

The intermediate wheel 27 is provided with a columnar engaging portion which engages with the ring-shaped recess of the drive wheel 26 at the center of the back surface of a disk having a required thickness, and has a diameter with the engaging portion interposed therebetween. Notches 29, 29 are formed in the upper symmetrical position from the outer peripheral edge toward the engaging portion, and a pair of cam followers 30, 30 are provided at symmetrical positions on the upper surface so as to be adjustable in height. The cam followers 25, 25 provided on the upper surface of the wheel 26
9, a thrust bearing 31 is interposed between the outer peripheral portion of the back surface of the intermediate wheel 27 and the thrust bearing of the load receiving ring 18 to form an interlocking mechanism. In FIG. 2, reference numeral 33 denotes a rotary encoder for detecting the position of the gate body 2 and the number of rotations of the rotary actuator 23 to control opening and closing.

The intermediate wheel 2 in this interlocking mechanism
7 are respectively engaged with long holes 14, 14 provided in the bracket 11 fixed to the outer cylinder 3, respectively, and the bearings 32 are slidably mounted on the center of the upper surface of the intermediate wheel 27. The fulcrum shaft 13 held by the bracket 11 is engaged with the rotary actuator 2.
By operating the outer cylinder 3, the outer cylinder 3 is rotatable in a predetermined range around the fulcrum shaft 13 on the inner cylinder 6.

That is, in the rotary gate 1 having the above structure, when the rotary actuator 23 is operated, the drive wheel 26 integral with the drive shaft 24 of the rotary actuator 23 simultaneously rotates, and engages with the cam follower 25 of the drive wheel 26. The combined intermediate wheel 27 also rotates. At the same time, since the cam follower 30 of the intermediate wheel 27 is engaged with the long hole 14 of the bracket 11 fixed to the upper end of the outer cylinder 3, the outer cylinder 3 rotates in the opening or closing direction with the fulcrum shaft 13 alone as a fulcrum. Although the upper collar ring 15a does not contact the inner peripheral surface of the outer cylinder 3, the lower 15b is lightly contacted with the inner peripheral surface of the outer cylinder 3 by the load of the gate body. The load does not actually hinder the rotation of the outer cylinder 3.

When the gate body 2 is stationary in the open or closed state, the load of the gate body 2 acts on the outer cylinder 3 to tilt the outer cylinder 3 toward the gate body 2. The bearing 32 engaged with the fulcrum shaft 13 slides slightly toward the gate body 2. As a result, the lower color ring 15b on the side of the gate body 2 contacts the inner peripheral surface of the outer cylinder 3 and the upper color ring 15a on the opposite side to the gate body 2 contacts the inner peripheral surface of the outer cylinder 3 respectively. Is prevented from rotating carelessly. When the outer cylinder 3 is rotated by the operation of the rotary actuator 23, the bearing 32 returns to the original state, that is, the center of the upper surface of the intermediate wheel 27, and the outer cylinder 3 rotates smoothly with the fulcrum shaft 13 as a fulcrum. It works.

The rotary actuator 23 provided in the inner cylinder 6 is basically a rotary actuator 23 as shown in FIGS.
Although in conjunction with the hydraulic pump 19 by main line pipe 20, 21 of the present, together with between the main conduit 20 and 21 connected by a bypass pipe 22 is provided with a closing valve V ₃ to the side path pipe 22, the By providing on-off valves V ₁ , V ₂ on the main pipeline pipes 20, 21 between the bypass pipe 22 and the hydraulic pump 19, the following use can be achieved.

First, as shown in FIG.
By opening both of the on-off valves V ₁ and V ₂ of 0 and 21 and closing the on-off valve V ₃ of the bypass pipe 22, it can be used as a normal electric hydraulic actuator. Further, as shown in FIG.
If both the on-off valves V ₁ and V ₂ of 0 and 21 are closed and the on-off valve V ₃ of the bypass pipe 22 is opened, the rotary actuator 23 is opened and the gate body 2 can be opened and closed manually. it can. At this time, by increasing the opening degree of the on-off valve V ₃ can quickly rotate the rotary actuator 23, rotary actuator 2 Smaller opening
3 can be slowed down. Further, as shown in FIG. 6, when the on-off valves V ₁ and V ₂ of the main pipes 20 and 21 and the on-off valve V ₃ of the bypass pipe 22 are all closed, the rotary actuator 23 can be completely locked. Even if any load acts on the direction of rotation of the gate body, careless rotation does not occur.

Although not shown, each of the on-off valves V ₁ -V
_By using a solenoid valve for each of the _three , opening and closing can be performed by remote control. Although it is possible to immediately stop the opening or closing operation of the gates body by the closing of the valves of the electromagnetic simultaneously by the backup power supply in case of power failure, opening and closing valve V ₃ of the bypass pipe 22 only It is more preferable that the opening can be used as a kind of shock absorber by opening the opening at a preset opening degree, and that the opening and closing can be manually performed.

FIG. 3 shows another embodiment of the rotary gate according to the present invention, in which a cylindrical inner cylinder 6 vertically supported on a base, and fixed to the gate main body, are provided. An outer cylinder 3 is rotatably fitted to the outer periphery of the outer cylinder 3 through a required clearance. A bracket 11 is fixed inside the upper end of the outer cylinder 3. A bearing 32 which holds the fulcrum shaft 13 so that the height thereof can be adjusted, and slidably provides the tip of the fulcrum shaft 13 at the upper end of the inner cylinder 6.
However, there is an interlocking mechanism for interlocking the drive shaft 24 of the rotary actuator 23 provided at the upper end of the inner cylinder 6 with the outer cylinder 6 holding the fulcrum shaft 13. Is different.

That is, in the embodiment shown in FIG. 3, a bracket 34 for holding the rotary actuator 23 is fixed inside the upper part of the inner cylinder 6, and the bracket 3
A ring-shaped turntable 3 in contact with the inner peripheral surface of the inner cylinder 6 on the upper surface of
5 is provided, and the rotary actuator 23 is fixed on the bracket 34 inside the turntable 35. On the drive shaft 24 of the rotary actuator 23, an arm member 36 integrally provided with engaging projections 35, 35 at both ends thereof is fixed.

On the other hand, the outer cylinder 3 is provided with a pair of bearings 37 on the inner peripheral portion below the bracket 11 holding the fulcrum shaft 13, and a back surface is provided between the bearings 37. Shaft rods 40, 40 provided on opposing outer peripheral portions of a disk 39 holding a plurality of rollers 38, 38 rotatably are mounted. The outer diameter of the disk 39 is the same as the outer diameter of the ring-shaped turntable 35, and the roller 38 held on the outer peripheral edge of the back surface of the disk 39 is free to roll on the turntable 35. The mounting position of 37 is taken into consideration, and a pair of long holes 41, 41 penetrating up and down in diameter are formed in the disk 39 at a predetermined interval, and the rotary actuator is formed in each of these long holes 41. The bearing 32 engages with the engagement protrusions 35 of the arm member 36 provided integrally with the drive shaft 24 of the 23 and engages with the fulcrum shaft 13 held by the outer cylinder 3 at the center of the upper surface of the disk 39. Are placed on each other to form an interlocking mechanism. In the figure, reference numeral 10 denotes a cap provided at the distal end of the outer cylinder 3, 15 denotes a color ring fixed to the outer peripheral portion of the inner cylinder 6, 20 and 21 denote main pipes of a rotary actuator 23 interlocked with a hydraulic pump, 33 Is an encoder.

In such a configuration, when the drive shaft 24 is rotated by the operation of the rotary actuator 23, the arm member 36 integrated with the drive shaft 24 is simultaneously rotated and the disk 39 interlocked via the engagement protrusion 35 is also rotated. Since the rotational force is applied, the outer cylinder 3 linked with the disk 39 via the shaft 40 rotates in a predetermined direction. At this time, since the roller 38 provided on the disk 39 rotates along the turntable 35, the outer cylinder 3 can be smoothly rotated.

In this embodiment, the two main pipelines connecting the hydraulic pump and the rotary actuator are provided with bypass pipes, and each pipe is provided with an electromagnetic on-off valve. Operations can be performed. Although not shown, also in this embodiment, a stopper member may be provided on each of the inner cylinder and the outer cylinder in order to rotate the outer cylinder within a certain range.

[0038]

According to the rotary gate of the present invention, the bearing provided on the inner cylinder engaged with the fulcrum shaft held on the outer cylinder is slidable, and the inner peripheral surface of the outer cylinder is provided on the outer peripheral portion of the inner cylinder. The required clearance is secured between them and the coloring is provided, so when the gate body is in the open or closed state and the outer cylinder is slightly inclined to the gate body side due to the weight of the gate body, it engages with the fulcrum shaft Because the bearing that slides slightly to the gate body side, part of the color ring contacts the outer cylinder to prevent the gate body from rotating carelessly, and the load on the gate body is only on the gate body side. It is possible to prevent a biased action.

In the rotary gate according to the present invention, one of the rotary actuators constituting the hydraulic actuator is provided in the inner cylinder, and the other hydraulic pump is provided at another place. It can be done by remote control. Also, a bypass pipe is provided between two main pipeline pipes connecting the rotary actuator and the hydraulic pump, and an open / close valve is provided on the bypass pipe, and an open / close valve is provided on each of the main pipeline pipes between the bypass pipe and the hydraulic pump. The combination of the opening and closing of these on-off valves allows the rotary actuator to be controlled freely, and has a great practical advantage.

[Brief description of the drawings]

FIG. 1 is a front view of a rotary gate according to the present invention.

FIG. 2 is a partially cutaway front view showing a main part of one embodiment of the rotary gate according to the present invention.

FIG. 3 is a partially cutaway front view showing a main part of another embodiment of the rotary gate according to the present invention.

FIG. 4 is an explanatory diagram showing one aspect of a connection state between a rotary actuator and a hydraulic pump in the present invention.

FIG. 5 is an explanatory diagram showing another aspect of the connection state between the rotary actuator and the hydraulic pump in the present invention.

FIG. 6 is an explanatory diagram showing still another aspect of the connection state between the rotary actuator and the hydraulic pump according to the present invention.

[Explanation of symbols]

1 rotary lock doors 2 gates body 3 outer tube 6 inner cylinder 11 bracket 13 support shaft 15a, 15b coloring 18 load receiving ring 19 hydraulic pump 20, 21 main passage pipe 22 side passage pipe V ₁ ~V ₃ off valve 23 rotary actuator 26 drive wheel 27 intermediate wheel 32 bearing

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Junichi Tsunoya 7358-5 Kamizuruma, Sagamihara City, Kanagawa Prefecture Tateyama Aluminum Exterior Co., Ltd.

Claims (8)

[Claims] A cylindrical outer cylinder provided on a gate body is rotatably disposed on an outer peripheral portion of a cylindrical inner cylinder which is vertically fixed on a base, and is provided above and below an outer peripheral portion of the inner cylinder. A color ring is provided while maintaining a clearance between the inner cylinder and the inner peripheral surface of the outer cylinder. A fulcrum shaft held at the center of the upper end of the outer cylinder is slidably provided at the upper end of the inner cylinder. A rotary gate configured to rotate the outer cylinder about the fulcrum shaft in combination. 2. A cylindrical outer cylinder provided on a gate body is rotatably disposed on an outer peripheral portion of a cylindrical inner cylinder which is vertically fixed on a base, and is provided above and below an outer peripheral portion of the inner cylinder. A color ring is provided while maintaining a clearance between the inner cylinder and the inner peripheral surface of the outer cylinder. A fulcrum shaft held at the center of the upper end of the outer cylinder is slidably provided at the upper end of the inner cylinder. When rotating the outer cylinder about the fulcrum shaft in combination, a rotary actuator interlocked with a hydraulic pump is provided at the upper end of the inner cylinder, and the outer cylinder is rotated by the rotary actuator. Features a rotating gate. 3. A cylindrical outer cylinder provided on a gate body is rotatably disposed on an outer peripheral portion of a cylindrical inner cylinder which is vertically fixed on a base, and is provided above and below an outer peripheral portion of the inner cylinder. A color ring is provided while maintaining a clearance between the inner cylinder and the inner peripheral surface of the outer cylinder. A fulcrum shaft held at the center of the upper end of the outer cylinder is slidably provided at the upper end of the inner cylinder. When rotating the outer cylinder around the fulcrum shaft in combination, a rotary actuator interlocked with a hydraulic pump is provided at the upper end of the inner cylinder, and a drive shaft of the rotary actuator and an outer cylinder holding the fulcrum shaft are provided. Are linked by an interlocking mechanism, and the fulcrum shaft is engaged with a bearing slidably provided on the upper surface of the interlocking mechanism, and the outer cylinder is rotated around the fulcrum shaft by the operation of the rotary actuator, whereby A rotating gate characterized by being configured to open and close a door body. 4. A load receiving ring fixed to an upper end portion of the inner cylinder for holding a rotary actuator, and a drive rotating in conjunction with a drive shaft of the rotary actuator in the load receiving ring. A wheel and an intermediate wheel that engages with a cam follower of the drive wheel and rotates on the load receiving ring, and a cam follower provided on the intermediate wheel engages with a bracket that holds the fulcrum shaft in a loose fit state. Along with
The tip of the fulcrum shaft provided on the bracket is engaged with a bearing slidably provided on the upper surface of the intermediate wheel, and the outer cylinder is rotated about the fulcrum shaft by driving a rotary actuator. Item 3. The rotary gate according to Item 3. 5. An interlocking mechanism fixed to an upper end of the inner cylinder for holding a rotary actuator, and a lower portion of a bracket for holding a fulcrum shaft provided at a center of the outer cylinder. And a pair of bearings fixed to face the inner peripheral surface of the outer cylinder, and a bearing held between the bearings and slidably mounted on the upper surface and engaged with the fulcrum shaft, and provided on the holding plate. 4. The rotary gate according to claim 3, comprising a bracket that is loosely fitted to the rotary shaft of the rotary actuator and drives the rotary actuator to rotate the outer cylinder about the fulcrum axis. 6. The hydraulic pump is connected by two main pipeline pipes arranged between the rotary actuator and the rotary actuator, and a bypass pipe is provided between the main pipeline pipes. 4. The rotary actuator according to claim 2, wherein an on-off valve is provided in each main pipe between the pipe and the hydraulic pump, and the rotary actuator is controlled by opening and / or closing the on-off valves. Revolving gate. 7. The rotary gate according to claim 2, wherein the rotary actuator is a swing type actuator having a rotation angle of 90 ° to 270 °. 8. The rotary gate according to claim 2, wherein the hydraulic pump is a vane pump whose discharge amount can be easily changed by changing an eccentric amount of a rotor and a cam ring.