JP2965250B2 - Chain gate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain gate installed at an entrance such as a parking lot or a plaza.

[0002]

2. Description of the Related Art Conventionally, as this kind of chain gate, for example, as disclosed in Japanese Utility Model Laid-Open Publication No. 3-32613, two gate posts are installed at a predetermined distance through which a vehicle can pass. A chain such as a link chain, a wire or a rope or the like (hereinafter referred to as "chains") is bridged between the gate columns of the book at a height where vehicle traffic can be blocked, and the chains are moved up and down on at least one of the gate columns. It is known that a specific vehicle such as a contract vehicle is allowed to pass through the vehicle.

A structure for vertically moving chains in a gate post is disclosed in the above-mentioned gazette, and the structure shown in FIG. 8 is implemented. That is, a screw shaft 102 extending in the vertical direction is rotatably arranged inside the gate post 101, and an electric motor 103 with a speed reducer is connected to the upper end of the screw shaft 102. A slide block 104 with a nut is attached to the screw shaft 102 so as to mesh with the nut,
A hook member 106 extending to the outside through a slit 105 formed on the side surface of the gate post 101 is fixed to the slide block 104 by welding, and chains are connected to the tip of the hook member 106 via a shackle 107. When the electric motor 103 operates, the screw shaft 102 rotates, and the slide block 104 is axially fed by the screw shaft 102,
The hook member 106 or chains move up and down. In FIG. 8, reference numeral 110 denotes a manual handle mounting shaft provided on the electric motor 103, reference numerals 111 and 112 denote a control panel and a connection box disposed on the opposite side of the hook member 106 with respect to the screw shaft 102 in the gate post 101, 113 and 114 are the control panel 11 respectively.
An upper back cover and a lower back cover for closing an inspection port formed on a side surface of the gate post 101 corresponding to the connection box 1 and the connection box 112;
Reference numerals 115 and 116 denote a control box and a remote control receiver arranged inside the upper part of the gate post 101, respectively.
Reference numeral 17 denotes a warning light formed of an incandescent light bulb provided at an upper portion of the gate post 101, and blinks in red when the chains are moved up and down to notify the driver of this.

As another structure for vertically moving chains, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-82715, a rotating body such as a pulley or sprocket driven by an electric motor is provided with a belt or a chain. A hanging member is wound around the hook member, and a hook member connected to one end of the chains is connected to one end of the hanging member to be supported in a suspended state, and the chains are moved up and down by the operation of the electric motor. Things are also known.

[0005]

However, in the above-mentioned conventional chain gate, if a power failure occurs when the chains are at the upper limit position, that is, at a height position where vehicle traffic can be blocked, a manager of a parking lot or the like is required. Alternatively, the vehicle owner must manually lower the chains to allow the vehicle to pass. In particular, in the case of a structure in which chains are moved up and down using the screw shaft 102, the pitch of the thread groove of the screw shaft 102 is usually small, so that the handle is attached to the attachment shaft 110 of the electric motor 103 and turned many times. Otherwise, chains cannot be lowered to the lower limit position where the vehicle can pass, and there is a problem that the operation is very troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the need for troublesome operation by automatically lowering chains from an upper limit position to a lower limit position during a power failure. It is intended to provide a chain gate capable of permitting the vehicle to pass through without interruption and preventing the vehicle from passing when power is restored after a power failure.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention basically relates to a method in which a chain or the like is provided between two pillars installed at a predetermined distance through which a vehicle can pass. In a chain gate that is hung at a height where traffic can be blocked, a hook member connected to one end of a chain is hung on at least one of the two pillars by a hanging member such as a chain or a belt. In addition to providing support so that the chain moves up and down by the operation of the electric motor, the state is maintained when the chain moves up to a height that can block the traffic of the vehicle by the operation of the electric motor, and the chain operates in the event of a power failure. It is configured to include a holding unit that releases the holding state so as to descend by its own weight. Accordingly, when the rotation of the electric motor is stopped by raising the chains to a height position at which the traffic of the vehicle can be blocked, that is, the upper limit position, the chains are reliably held at the upper limit position by the holding means. On the other hand, since the holding state by the holding means is released at the time of a power failure, the chains descend to the lower limit position, that is, a position where the vehicle can pass while forcibly rotating the motor shaft by the weight of the chains.

[0008] The present invention is also provided with a control unit that automatically raises the chains to a height position at which vehicle traffic can be blocked when power is restored after a power failure. This allows
When power is restored after a power failure, the chains automatically rise to the upper limit position before the power failure, so that traffic of the vehicle can be prevented.

The invention according to claim 1 particularly provides a preferable embodiment of a structure for vertically moving the hook member.
That is, the hanging member is constituted by an endless chain wound around a pair of sprockets provided respectively on the upper and lower portions of the portal, and a hook member is connected to a part of the endless chain, and Is configured to transmit the rotational force from the electric motor to the sprocket. As a result, the power (rotational force) of the electric motor is reliably converted into the vertical movement of the hook member via the chain and the sprocket, and the chains smoothly move up and down.

The invention according to claim 2 is one of the safety measures against the release of the holding state by the above-mentioned holding means at the time of a power failure. And a governor for preventing the vehicle from descending. Thus, when the chains are lowered by their own weight due to the release of the holding state by the holding means at the time of the power failure, the speed of the descent is controlled by the governor, and the chains may collide with the ground at a rapid speed. As a result, damage to the chain gate, generation of noise, and the like are prevented.

According to the third aspect of the present invention, as another safety measure against the release of the holding state by the holding means at the time of a power failure, the vehicle falls at a rapid speed to the lower part of the gate by releasing the holding state by the holding means at the time of the power failure. A damper is provided to reduce the impact caused by the collision of the chains with the ground. Thereby, when the chains descend at a rapid speed due to their own weight due to the release of the holding state by the holding means at the time of power failure,
The dampers reduce and mitigate the impact due to the collision of the chains with the ground, thereby preventing damage to the chain gates and noise.

According to a fourth aspect of the present invention, as one of the safety measures for the chain gate, a shackle is used to connect one end of the chain to the hook member, and the vehicle collides with the shackle pin against the chain. A fragile part that breaks when it is broken is formed. Thus, when the vehicle collides with the chains due to the carelessness of the driver or the like, the fragile portion of the shackle pin is broken at an early stage, so that there is no significant damage to the pillar or the vehicle.

[0013] The invention according to claim 5 provides a preferred form of connection between the hook member and the suspension member in the chain gate. That is, the hook member is rotatably connected to the hanging member, and when receiving tension from the chains, the hook member is inclined downward at a relatively small angle from the horizontal direction, and the chains contact the ground. The hook member is configured to be inclined downward at a relatively large angle by its own weight when tension is no longer applied from the chains.
Thereby, when the hook member is at the lower limit position and the chain is in contact with the ground and the vehicle can pass, the hook member is inclined downward at a relatively large angle by its own weight, and the chain is connected to the end connected to the hook member. The part also comes into contact with the ground, so that the traffic of the vehicle is made easier.

[0014] The invention according to claim 6 provides a preferable form of an inspection port provided for electrical connection and inspection on a gate post. That is, the inspection port is provided on the same side of the gate post as the slit through which the hook member passes. In the case where the inspection port is provided on the opposite side of the slit of the gate post as in the related art, it is necessary to secure a space not only on the slit side of the gate post, which is the side of the vehicle, but also on the opposite side. However, there is no need to secure such a space, and restrictions on the installation location of the gate post are relaxed.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a chain gate A according to an embodiment of the present invention.
Two (only one is shown in the figure) gate pillars 1 installed at a predetermined distance through which the vehicle can pass, and are bridged between the two gate pillars 1 at a height position at which vehicle traffic can be prevented. And link chains 2 as chains. The two pillars 1 have the same basic configuration, and in the following description, one of the illustrated pillars 1 will be described.

That is, as shown in FIGS. 4 and 5, the gate post 1 is provided with a substantially rectangular substrate 4 fixed on a road surface at an installation place by an anchor bolt 3, and provided vertically on the substrate 4. A cylindrical support column 5 having a rectangular cross section is provided, and an elliptical casing 6 having a flat portion on one side and having a flat cross section is provided to cover the support column 5. On one side surface of the support column 5, an inspection port 7 is formed over substantially the entire surface, and an inspection lid 8 for closing the inspection port 7 is attached by a screw. A slit 10 through which a hook member 9 connected to one end of the link chain 2 penetrates is formed over substantially the entire vertical direction. A first lower case 12 covering the three sides of the support column 5 except for the inspection port 7 side and fixedly attached to the support column 5 together with the inspection lid 8;
A second lower case 14 that covers the side surface of the support post 5 on the inspection port 7 side and a lower end of which is engaged with a pin 13 provided on the substrate 4 and is attached to the support post 5;
And an upper case 15 joined to the upper end of the inspection cover 8 so as to cover them. The second lower case 14 has a slit 16 through which the hook member 9 continuously passes through the slit 10 of the inspection lid 8. Is formed.

A motor housing 21 is mounted on the upper part of the support column 5. An upper sprocket 22 is rotatably supported on the motor housing 21, and an electric motor 23 and a reduction gear mechanism are provided in the motor housing 21. 24 are provided. A lower sprocket 25 is provided at a lower portion in the support column 5, and an endless roller chain 26 as a suspension member is wound between the lower sprocket 25 and the upper sprocket 22. A part of the chain 26 is fixed to a lifting plate 27. This lifting plate 2
7, one end of the hook member 9 is rotatably connected, and a pair of upper and lower guide rollers 28, 28 is rotatably mounted on the opposite side of the connection between the hook member 9 and the roller chain 26. Guide rollers 28, 28
Is adapted to move while rotating in a vertically extending guide rail 29 formed on the inner surface of the support column 5. When the motor 23 is operated, its rotational force in the forward rotation direction or the reverse rotation direction is transmitted to the upper sprocket 22 via the reduction gear mechanism 24, and when the sprocket 22 rotates, the lifting plate 27 or the hook member 9 is moved by the roller chain. It is configured to rise or fall under the guide between the guide roller 28 and the guide rail 29 while being supported in a suspended state by 26.

The link chain 2 is stretched between the two portal columns 1 with a predetermined tension, and is connected to the hook members 9 of each portal column 1 by using a shackle 31. As shown in FIG. 4, at least one of the pillars 1 has a fragile portion 31 b having a smaller diameter than the other portion of the pin 31 a of the shackle 31, and the fragile portion 31 b is formed when the vehicle collides with the link chain 2. 31b breaks prematurely.

In the motor housing 21, as shown in FIG. 5, in addition to the electric motor 23 and the reduction gear mechanism 24, there is provided an electromagnetic brake 33 as holding means connected to the rotating shaft 23a of the electric motor 23. Electromagnetic brake 33
Is an excitation type that is excited when energized to brake the rotation of the electric motor 23. Further, a governor between the electric motor 23 in the motor housing 21 and the electromagnetic brake 33 for preventing the hook member 9 or the link chain 2 from descending at a speed higher than a predetermined speed by releasing the brake at the time of a power failure. 40 are incorporated.

As shown in detail in FIG. 6, the governor 40 is formed integrally with the motor housing 21 and includes the electric motor 2.
Brake drum 4 located concentrically with the rotating shaft 23a
1, a rotating plate 42 attached to the rotating shaft 23a of the electric motor 23 so as to rotate integrally with the rotating shaft 23a,
A pair of crescent-shaped weight members 44, 44, which are disposed on the two side surfaces with the rotating shaft 23 a of the electric motor 23 interposed therebetween and each of which is rotatably supported at one end via a support shaft 43; And a spring 45 connecting the other ends of the weight members 44. When the rotating shaft 23a of the electric motor 23 rotates at a high speed above a predetermined rotational speed, each weight member 44
Rotate against the biasing force of the spring 45 due to the centrifugal force acting on it, and rotate in a direction away from each other with the support shaft 43 as a fulcrum, and the lining 46 mounted on the outer edge thereof presses against the inner peripheral surface of the brake drum 41. As a result, the braking force acts on the rotating shaft 23a of the electric motor 23.

The upper case 15 is provided with two upper and lower warning lights 51a and 51b and a nightlight 52.
Each of the warning lights 51a and 51b blinks when the link chain 2 moves up or down to call attention.

2 and 3, reference numeral 61 denotes a control box fixed to the upper end of the support column 5, 62 denotes a photoelectric switch as an optical sensor for detecting passage of a vehicle, and 63 and 64 denote upper limits of the hook member 9. These are limit switches for detecting the position and the lower limit position, respectively.
The signals of .about.64 are input to the control box 61 and used for control of the electric motor 23, the electromagnetic brake 33, and the like by the control box 61. The control box 61 receives an operation signal from a remote control transmitter via an antenna and a receiver provided on one of the portal posts 1 (not shown).

Next, the operation of the chain gate A will be described. Now, link chain 2 of chain gate A
Is at a height position (upper limit position) at which traffic of the vehicle can be blocked, and the vehicle passes through the chain gate A. At this time, since the hook member 9 of each of the portal columns 1 receives tension from the link chain 2, the hook member 9 is inclined downward at a relatively small angle with respect to a horizontal line passing through a connection point with the lifting plate 27 (see FIG. 3). State shown by a solid line).

When the driver opens the chain gate A from the inside of the vehicle using the remote control transmitter, the operation signal is input to the control box 61 via the antenna and the receiver, and under the control of the control box 61, After releasing the braking state by the electromagnetic brake 33 in each of the portal columns 1, the electric motor 23 rotates in the reverse rotation direction, and the rotational force is transmitted to the upper sprocket 22 via the reduction gear mechanism 24, and the upper sprocket 22 rotates. As a result, the elevating plate 27 and the hook member 9 supported by the roller chain 26 are lowered, and the link chain 2 is also lowered accordingly. At this time, the lifting plate 27
And the hook member 9 includes the guide rail 29 and the guide roller 2.
Since the link chain 2 descends substantially straight and smoothly under the guidance of 8, the link chain 2 does not hit a wave or tilt to one of the portals 1 side.

When the lift plate 27 and the hook member 9 are lowered to the lower limit position, and the link chain 2 comes into contact with the ground and the vehicle can pass over the link chain, the lower limit switch 64 is turned off. Is detected,
Under the control of the control box 61 receiving the detection signal, the operation of the electric motor 23 is stopped, and at the same time, the electromagnetic brake 33 is operated to brake the rotation shaft 23a of the electric motor 23 and, consequently, the rotation of the upper sprocket 22. Thereby, the hook member 9 and thus the link chain 2 can be reliably stopped at the lower limit position. When the link chain 2 comes into contact with the ground, the hook members 9
When the tension is no longer applied to the link chain, the hook member 9 rotates around its connection point with the lifting plate 27 by its own weight and inclines downward at a relatively large angle as shown by the phantom line in FIG. The end 2 is in contact with the ground even at the end connected to the hook member 9, so that the vehicle can pass even near the gate pole 1, thereby contributing to an improvement in safety.

In addition, when the vehicle passes between the two pillars 1 when the link chain 2 is at the upper limit position or during the descending operation, for example, when the driver overlooks the warning lights 51a and 51b, the link chain Since the fragile portion 31b of the shackle pin 31a that connects the end of the link chain 2 and the hook member 9 breaks before a large collision load is applied to the hook 2, the gate pillar 1 and the vehicle are not seriously damaged, and the safety is improved. Sex can be further enhanced.

When the vehicle passes between the gate posts 1 after the link chain 2 has descended to the lower limit position, the photoelectric switch 62 detects that, and after the vehicle has passed, under the control of the control box 61, The braking of the electromagnetic brake 33 is released, the electric motor 23 rotates in the forward rotation direction, and the rotational force is transmitted to the upper sprocket 22 via the reduction gear mechanism 24 to rotate the upper sprocket 22, thereby causing the hook member 9 and thus the hook member 9 to rotate. The link chain 2 moves up. When the electric motor 23 is moved to the upper limit position, the upper limit switch 63 detects this, and the operation of the electric motor 23 is stopped, and at the same time, the electromagnetic brake 33 is operated to rotate the rotating shaft 23a of the electric motor 23 and thus the upper sprocket 22.
Is stopped, whereby the hook member 9 and thus the link chain 2 are reliably stopped at the upper limit position. As described above, a series of operations when the vehicle passes between the two gate columns 1 ends.

If a power failure occurs when the link chain 2 is at the upper limit position, that is, at a height position at which vehicle traffic can be blocked, the electromagnetic brake 33 is of the excitation type, so that the braking is stopped. To release. Then, while rotating the upper sprocket 22 or the electric motor 23 by the weight of the link chain 2 or the like, the link chain 2 descends to a position where the vehicle can pass. For this reason, the traffic of the vehicle can be secured without bothering the parking lot manager and the driver of the passing vehicle, and is very effective in preventing power failure. Moreover, when the lowering speed of the link chain 2 becomes lower than a predetermined value when the link chain 2 is lowered, the lowering speed is suppressed by the governor 40 provided on the rotating shaft 23a of the electric motor 23, so that the link chain 2 is gradually lowered. Become
If the chain gate A itself is damaged or the link chain 2
Does not hit the ground and generate noise.

On the other hand, when the power is restored after the power failure, the operation of the motor 23 and the like is controlled according to the flowchart shown in FIG.
The link chain 2 automatically returns to the upper limit position before the power failure.

That is, in FIG. 8, first, in step S1, it is determined whether or not the upper limit switch 63 is ON, that is, whether or not the link chain 2 is at the upper limit position. When this determination is not at the upper limit position of NO,
Further, it is determined in step S2 whether or not the start switch is ON, and in step S3, it is determined whether or not the photoelectric switch 62 is ON. The start switch corresponds to an operation switch of a remote control transmitter, a start switch in the control box 61, and the like. When the start switch is ON, it means that the opening / closing operation of the link chain 2 is performed by an administrator or the like. means. Also, the fact that the photoelectric switch 62 is ON means that there is some kind of obstacle between the two gate posts 1. When both the determinations are NO, the output of the electromagnetic brake 33 is turned off at the same time as the electric motor 23 is rotated forward in step S4, that is, the braking is released, and the link chain 2 is raised. Subsequently, after waiting for the link chain 2 to rise to the upper limit position and the upper limit switch 63 to be turned on in step S5,
In step S6, the output of the electromagnetic brake 33 is turned on at the same time as the normal rotation output of the electric motor 23 is turned off, the link chain 2 is held at the upper limit position, and the control at the time of power recovery is ended. If any of steps S1 to S3 is YES
In this case, the control at the time of power recovery is immediately terminated. According to the above control flow, the control unit 66 that automatically raises the link chain 2 to the upper limit position when the power is restored after the power failure is configured.

Therefore, according to such control, when the power is restored after the power failure, the link chain 2 automatically returns to the upper limit position before the power failure. The management of the chain gate A can be facilitated.

Further, when inspecting the inside of the gate post 1 (especially the support post 5) at the time of installing or checking the chain gate A, after removing the link chain 2 from the hook member 9, first, the upper case 15 is moved upward. Lift slightly. Next, the second lower case 14 having the slit 16 through which the hook member 9 penetrates and facing the passage side of the vehicle is slightly lifted upward, and the lower end of the second lower case 14 is The engagement is released, and the second lower case 14 is removed. Subsequently, the inspection cover 8 facing the passage side of the vehicle is removed from the support column 5 and the inspection opening 7 is opened. Then, the inside of the support column 5 can be inspected from the inspection port 7. In this test,
First lower case 12 of gate post 1 facing other than the passage side of the vehicle
There is no need to remove. Therefore, there is no need to provide an empty space for inspection or the like in the periphery of the gate post 1 other than on the side of the vehicle, so that restrictions on the installation location of the gate post 1 can be relaxed and the versatility is excellent.

It should be noted that the present invention is not limited to the above-described embodiment, but includes other various embodiments. For example, in the above embodiment, the upper sprocket 22 and the lower sprocket 25 are provided on the upper and lower portions of the portal 1, respectively, and both sprockets 22, 25 are provided.
An endless roller chain 26 is wound between the roller chains 26, and the hook member 9 is connected to a part of the roller chain 26 via an elevating plate 27.
A rotating body such as a sprocket and a pulley, which is driven to rotate by an electric motor, is provided only on the upper part of the gate post, a hanging member such as a chain or a belt is wound around the rotating body, and a hook member is connected to one end of the hanging member. Alternatively, it may be configured to be supported in a suspended state.

Further, in the above-described embodiment, the excitation-actuated brake 33 is connected to the electric motor 23 so that the link chain 2 descends due to its own weight in the event of a power failure. In place of the link chain 2, for example, when the link chain 2 is raised to the upper limit position,
May be held at the upper limit position, and at the time of a power failure, the projecting pins and the like may be returned to the standby position by demagnetization to release the holding state of the link chain 2 so that the link chain 2 descends by its own weight.

Further, in the above embodiment, as a safety measure against brake release at the time of power failure, the rotating shaft 2
A speed governor 40 for suppressing the rotation speed of the hook member 9 and the lowering speed of the hook member 9 to a predetermined speed or less is provided on 3a.
The present invention provides a damper 70 as shown in FIG. 7 instead of or together with the governor 40, and the link chain 2 which falls at a rapid speed by releasing the brake at the time of power failure.
The impact caused by the collision with the ground may be absorbed and reduced.

That is, the damper 70 comprises a channel-shaped damper holder 71 fixed on the substrate 4 in the gate column, and left and right side walls 71a,
A damper plate 72 provided to be vertically movable along 71a, and a fixed horizontal portion 71 of the damper holder 71;
b and two coil springs 73, 73 arranged in parallel between the damper plate 72 and two spring guides 74, comprising bolts penetrating through the damper plate 72 and inserted into the respective coil springs 73.
74. Each side wall 7 of the damper plate 71
1a is provided with a vertically elongated guide hole 75, and a projection 76 inserted into the guide hole 75 is formed at a side end of the damper plate 72.
The damper plate 72 moves up and down under the guide between the convex portion 76 and the guide hole 75. And
The damper holder 71 is fixed on the substrate 4 with the center lines of the damper holder 71 and the damper plate 72 positioned on the lifting line of the lifting plate 27, and the link chain 2 is rapidly moved by releasing the brake during a power failure. When dropping, the lifting plate 27 abuts on the damper plate 72 and compresses the coil spring 73 to absorb and reduce the impact of the link chain colliding with the ground.

Furthermore, in the above embodiment, the case where the hook member 9 connected to the link chain 2 is moved up and down by each of the two portal columns 1 has been described. However, the present invention provides one of the two portal columns. It goes without saying that the present invention can be similarly applied to a case where the hook member is moved up and down only by the gate post, or a case where another chain, wire, rope, or the like is used instead of the link chain 2.

[0039]

As described above, according to the chain gate of the present invention, normally, the chains can be reliably held at the upper limit position by the holding means such as the excitation type brake, and at the time of a power failure, the upper limit is maintained. By releasing the holding state at the position, the chains descend to the lower limit position due to their own weight, so that the traffic of the vehicle can be enabled without bothering the parking manager or the like, It has an effect excellent in practicality. In addition, when the power is restored after a power failure, the chains automatically return to the upper limit position before the power failure, so that no work is required for the restoration work at the time of the power failure, and the management of the chain gate can be further facilitated. This also has the effect.

In particular, in the invention according to the first aspect , since the power of the electric motor is reliably converted into the vertical movement of the hook member via the chain and the sprocket, the vertical movement of the chains can be performed smoothly.

According to the second aspect of the present invention, when the chains are lowered by their own weight due to the release of the holding state by the holding means at the time of a power failure, the speed of the chains is controlled by the governor, so that the chain gate is controlled. Also, it is possible to prevent the occurrence of damage and noise.

According to the third aspect of the invention, when the chains fall at a rapid speed due to their own weight due to the release of the holding state by the holding means at the time of power failure, the shock caused by the collision of the chains with the ground by the damper is provided. Because it ’s relaxed,
As in the invention according to the second aspect, there is an effect that damage to the chain gate, generation of noise, and the like can be prevented.

According to the fourth aspect of the invention, when the vehicle collides with the chains, the fragile portion of the shackle pin that connects one end of the chains and the hook member is broken at an early stage, so that the pillars and the vehicle are seriously damaged. , And safety can be effectively improved.

According to the fifth aspect of the invention, when the chain is in contact with the ground and the vehicle can pass, the hook member is inclined downward at a relatively large angle by its own weight, and the chain is connected to the hook member. Since the end portion also comes into contact with the ground, the traffic of the vehicle is facilitated by that amount, which can contribute to an improvement in safety.

According to the sixth aspect of the present invention, since it is not necessary to secure a space other than the side of the vehicle on the gate post, restrictions on the installation location of the gate post can be relaxed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chain gate according to an embodiment of the present invention.

FIG. 2 is a front view of the gate post of the chain gate, partially cut away from the side of a vehicle passage.

FIG. 3 is a sectional view taken along line KK of FIG.

FIG. 4 is an enlarged sectional view taken along line LL of FIG. 2;

FIG. 5 is an enlarged sectional view taken along line MM of FIG. 2;

FIG. 6 is an enlarged sectional view taken along line XX of FIG. 5;

FIG. 7 is a partially cutaway front view of a damper according to another embodiment of the present invention.

FIG. 8 is a flowchart illustrating control during power recovery.

FIG. 9 is a perspective view showing an internal configuration of a conventional chain gate pillar.

[Explanation of symbols]

 A Chain Gate 1 Gate 2 Link Chain (Chains) 7 Inspection Port 9 Hook Member 10 Inspection Cover Slit 16 Second Lower Case Slit 22 Upper Sprocket 23 Electric Motor 25 Lower Sprocket 26 Endless Roller Chain (Hanging Member) 31 Shackle 31a Pin 31b Fragile part 33 Electromagnetic brake (holding means) 40 Governor 66 Control unit 70 Damper

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-11-71728 (JP, A) JP-A-7-82715 (JP, A) JP-A-10-37142 (JP, A) 145915 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E01F 13/00

Claims (6)

(57) [Claims] 1. Installation at a predetermined distance through which vehicles can pass
A chain between the two gate posts was used to block traffic
A chain gate that spans at the height you want
In addition, at least one of the two gate posts has a chain
Hook member connected to the endIs a hanging memberHanging by
Supported vertically and moved up and down by the operation of the motor
It is provided in,The hanging members are provided at the top and bottom of the gate post, respectively.
Endless wound between a pair of sprockets
Chain, part of this endless chain
The hook member is connected, and the
Structure so that the rotational force from the motor is transmitted to the
Has been established,  Chains block vehicle traffic due to the operation of the motor
Only when it is raised to a height
In the event of a power outage, chains will descend due to their own weight
Holding means for releasing the holding state at the time of, and can prevent the vehicle from passing through the chains when the power is restored after a power failure
And a control unit for automatically ascending to the height position.
And a chain gate characterized by the following. 2. The state of holding by said holding means at the time of a power failure.
Chains descend at a speed higher than the specified speed upon release
2. The chain gate according to claim 1 , further comprising a governor for preventing the movement of the chain. 3. The holding means at the time of a power failure is provided below the gate post.
Chain that drops at a rapid speed when the holding state is released by
Dampers to mitigate the impact of collisions with similar types of ground
According to claim 1 or 2 wherein the chain gate is provided. 4. A chain member having one end and a hook member.
A shackle is used for connection, and this shackle pin
Has a fragile part that breaks when the vehicle collides with chains.
Chain gate according to any one of claims 1 to 3 is formed. 5. A vehicle which is installed at a predetermined distance where vehicles can pass.
A chain between the two gate posts was used to block traffic
A chain gate that spans at the height you want
In addition, at least one of the two pillars has a chain
The hook member connected to the end is used to suspend chains, belts, etc.
It is supported in a suspended state by the hanging member and the motor operates.
Vertical movement is provided such that, the hook member is rotatably coupled is to hanging member by
Horizontal when the chain is under tension from chains.
From a relatively small angle to
When the chain stops touching the ground and no longer receives tension
Is inclined downward at a relatively large angle due to its own weight
The chains prevent the vehicle from passing by the operation of the electric motor
Only when it is raised to a height
In the event of a power outage, chains will descend due to their own weight
Means for canceling the holding state, and can prevent chains from passing through the vehicle when power is restored after a power failure
And a control unit for automatically ascending to the height position.
And a chain gate characterized by the following . 6. Installation at a predetermined distance through which vehicles can pass
A chain between the two gate posts was used to block traffic
A chain gate that spans at the height you want
In addition, at least one of the two pillars has a chain
The hook member connected to the end is used to suspend chains, belts, etc.
It is supported in a suspended state by the hanging member and the motor operates.
Is provided so as to move up and down, and the gate post has the same side as the slit through which the hook member penetrates.
There is an inspection port in the chain, and the operation of the electric motor prevents the chains from passing through the vehicle.
Only when it is raised to a height
In the event of a power outage, chains will descend due to their own weight
Means for canceling the holding state, and can prevent chains from passing through the vehicle when power is restored after a power failure
And a control unit for automatically ascending to the height position.
And a chain gate characterized by the following .