JPH1018707A - Door device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect the components of a door device, in the case of the action of an excessive force on a door body in a close state. SOLUTION: This door device 10 has a door body 18 opened and closed on the operation of a motor. Also, the door device 10 has constraining means 50, 52, 54, 56 and 60 of cam mechanisms for constraining the motion of the door body 18 at a closed position, when the door body 18 is moved from an open position to the closed position. Also, the constraining means 50, 52, 54, 56 and 60 are formed so as not to be released from a constraining status, unless a force equal to or above the preset level is applied to the door body 18. Furthermore, when voltage for the electromagnetic lock of an electric motor is set at a value lower than normal braking voltage, a load acting on a transmission mechanism or the like can be lowered in an emergency breakthrough.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door device provided at a ticket gate at a station, an entrance to an amusement park, or the like.

[0002]

2. Description of the Related Art In general, a door device provided in a ticket gate and the like is configured to open and close a door body by an electric motor. When blocking the passage of a passenger using such a door device, the electric motor is controlled to rotate the door body from the open position to the closed position, and then the electric motor is controlled by the electric motor at a predetermined timing. , The electromagnetic brake is applied to stop the door body at the closed position.

[0003] When the door body is located in the closed position, the passage is blocked, so that the passage of the passengers is blocked. However, even if the door body is pushed open to force a breakthrough. There is. Such actions should be prevented as much as possible. Therefore, conventionally,
When the door body is in the closed position, a state in which a braking voltage is applied to the electric motor, that is, a so-called electromagnetic lock state is set so that the door body cannot be easily pushed open.

[0004]

By the way, in the door device of the ticket gate, the opening / closing operation of the door main body is performed at a high speed. Therefore, it is necessary to considerably increase the braking voltage to increase the braking force. For this reason, in a state where the electromagnetic lock is performed by the braking voltage, the motor shaft of the electric motor is kept stationary unless a considerably large force is applied. Therefore, when an excessive force is applied to the door body in the closed position in order to make a forcible breach, an excessive load is applied to the components of the door device, particularly the transmission mechanism between the motor shaft of the electric motor and the support shaft of the door body. And the transmission mechanism and other members may be damaged.

The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a door device that cannot easily push and open a door body in a closed state. Another object of the present invention is to provide a means for effectively protecting the components of the door device when the door body in the closed position is forcibly rotated. Still another object of the present invention is to provide a means for promptly confirming that an action has been taken in the event of a forced breach.

[0006]

To achieve the above object, a door device according to the first aspect of the present invention comprises an apparatus frame, a door body rotatably supported by a support shaft on the apparatus frame, and An electric motor mounted on the device frame and configured to rotate the door body in both directions of the rotation direction from the open position to the closed position and the opposite direction, and is provided between a motor shaft of the electric motor and a support shaft of the door body. A transmission mechanism, control means for controlling an electric motor for rotating and braking the door body, a cam plate fixed to the support shaft of the door body, and a cam mounted on one end of the apparatus frame so as to be swingable. A swing arm having a cam roller engaged with the cam surface of the plate; and elastic means for applying an elastic force to the other end of the swing arm to engage the cam roller with the cam surface. In such a door device, the cam surface engages with the cam roller when the door body is in the closed position to restrict the movement of the door body in the turning direction. When a force equal to or greater than the value is applied to the door body, the cam roller is pushed to release the restraint. In such a configuration, unless considerable force is applied to the door body,
The door body cannot be pushed open, making it difficult to break through.

Further, in the door device having the above-described structure, the cam roller can hit the cam surface of the cam plate at the moment when the restraint is released, so that a striking sound is generated. The impact sound indicates that the door body has been forcibly rotated.

According to the third and fifth aspects of the present invention, when the door body is braked and is placed in the closed position, a voltage lower than the braking voltage applied to the electric motor is applied to lock the electric motor. It is characterized by having an electromagnetic locking means. The motor shaft of the electric motor that is electromagnetically locked at a low voltage can be rotated with a smaller force as compared with the case where the motor shaft is electromagnetically locked with a braking voltage. Therefore, even if an excessive force acts on the door main body, the load applied to the transmission mechanism between the electric motor and the door main body is small, which contributes to protection of the transmission mechanism and the like.

Further, as described in claim 4 and claim 6, when a flexible shaft joint such as a rubber shaft joint is interposed on one of the shafts constituting the transmission mechanism, the door is provided at the shaft joint. The impact force from the main body can be absorbed and reduced, and the electric motor and the like can be protected.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to FIGS.

The illustrated door device 10 is used for a ticket gate of a type in which opening and closing are performed by a switch operation of a station staff, and has a device frame 12 installed along a passage. The apparatus frame 12 is provided with a support plate 14 extending horizontally at a predetermined height position, and a support bracket 16 extending upward from the support plate 14. Between the support plate 14 and the upper end of the support bracket 16, the door body 18 is pivotally supported so as to be rotatable in the horizontal direction. That is, the upper and lower portions of the support shaft 20 provided at one end of the door body 18 are respectively connected to the bearings 22 at the upper end of the support bracket 16.
And is rotatably supported by the bearing 24 of the support plate 14. The lower part of the support shaft 20 is the support plate 1
4 and extends downwardly, the lower end of which
4 is supported by bearings 28 of a base 26 extending in the horizontal direction and disposed below.

An electric motor 30 for rotating the door body 18 is installed on the support plate 14. The illustrated electric motor 30 is rotatable in both forward and reverse directions, and is integrally provided with a deceleration transmission mechanism 32. An output shaft 34 of the speed reduction transmission mechanism 32 extends vertically downward, and a distal end thereof is connected to a transmission shaft 38 via a rubber shaft joint 36 as a flexible shaft joint. The transmission shaft 38 is rotatably supported by a bearing 40 provided on the support plate 14, and a gear 42 is integrally provided at a lower end thereof. The gear 42 meshes with a gear 44 keyed to the lower part of the support shaft 20 of the door body 18,
The rotation driving force of the electric motor 30 is transmitted to the support shaft 20 via the reduction transmission mechanism 32, the transmission shaft 38, and the gears 42 and 44. Therefore, the electric motor 30 is controlled by the control device 46 and the motor shaft 48 of the electric motor 30 is controlled.
Is rotated, the door body 18 is moved to the device frame 1.
2 and a closed position (position shown in FIG. 3) which is disposed substantially at right angles to the device frame 12 and closes the passage. It is pivoted between. Further, the control device 46 can apply a braking voltage (for example, 24 V) to the electric motor 30 to apply an electromagnetic brake, and stop the door main body 18 at the open position or the closed position. Further, the control device 46
When the door body 18 reaches the closed position, the door motor 18 also has a function of electromagnetically locking the electric motor 30 at a voltage lower than the braking voltage (for example, 5 V). In order to ensure that the electromagnetic lock function works, it is preferable to provide a position sensor (not shown) for detecting whether or not the door main body 18 is located at the closed position, and connect the position sensor to the control device 46. It is.

Further, a rigid cam plate 50 is keyed to a lower portion of the support shaft 20 of the door body 18. This cam plate 50 has a cam surface 5
It is 2. As shown in FIGS.
Consists of a first arc portion 52a and a second arc portion 52b centered on the center axis of the support shaft 20, and the radius of the second arc portion 52b is made larger than the radius of the first arc portion 52a. I have. Further, the first arc portion 52a and the second arc portion 52a
A boundary portion 52c between the circular arc portion 52b and the circular arc portion 52b has a step surface as shown in the figure.

A cam roller 54 is engaged with the cam surface 52 of the cam plate 50. The cam roller 54 is rigid, and has one end of a rigid swing arm 56 pivotally supported on the base 26. Attached to. Also,
One end of a tension coil spring 58 is connected to the other end of the swing arm 56 extending from the shaft support portion 57 in the direction opposite to the cam roller 54, and the other end of the coil spring 58 is located at an appropriate position on the base 26. It is fixed to. Therefore, the swing arm 56 is pulled by the elastic action of the coil spring 58 in the direction in which the cam roller 54 engages with the cam surface 52 of the cam plate 50. 2 to FIG.
The screw indicated by is used to adjust the force with which the cam roller 54 engages with the cam plate 50.
By pressing the side surface of the coil spring 58, the tensile force of the coil spring 58 is changed.

Here, the cam roller 5 with respect to the cam surface 52
4, the cam roller 54 is separated from the cam surface 52 and closed from the open position when the door body 18 is in the open position as shown in FIG. On the way to the position,
With the circular arc portion 52a. When the door body 18 is in the closed position, the cam roller 54 engages with the step surface 52c of the cam surface 52 as shown in FIG. In this state, even if a small force is applied in the turning direction (the direction of arrow B in FIG. 3) for turning the door body 18 from the open position to the closed position, the door surface 18 is rotated by the engagement between the step surface 52c and the cam roller 54. The movement of the door body 18 in the movement direction is restricted. When the door body 18 is in the position beyond the closed position, the cam roller 54 engages with the second arc portion 52b of the cam surface 52 (see FIGS. 4 and 5).

Next, the operation of the door device 10 will be described. First, when a station staff or the like operates the close switch 62 with the door body 18 in the open position, the controller 46 receives a signal from the switch 62 and the electric motor 3
0 is rotated in a predetermined direction.
8 and the door body 18 through gears or the like, that is, transmission mechanisms 32, 34, 36, 38, 42, and 44,
The door body 18 is rotated toward the closed position. Then, an electromagnetic brake is applied to the electric motor 30 at an appropriate timing, and the door body 18 is stopped at the closed position. When the door body 18 stops at the closed position, the control device 46 reduces the braking voltage and electromagnetically locks the electric motor 30 at a low voltage. Of course, since the electromagnetic lock is a low voltage electromagnetic lock, the restraining force of the door main body 18 by only the electromagnetic lock is relatively weak. Since the door body 18 is engaged with the cam roller 54, the door body 18 does not move from the closed position unless a considerably large force is applied in the rotation direction of the arrow B in combination with the restraining force of the cam mechanism.

When a force equal to or more than a predetermined value is applied to the door body 18 in the direction indicated by the arrow B, the cam plate 50 attempts to rotate in the same direction, and the cam roller 54 resists the spring force of the coil spring 58. Is pushed in the direction of arrow C in FIG. 3 or FIG. 4, and the cam roller 54 reaches the second arc portion 52b of the cam surface 52 (state in FIG. 4). Thereby, the restraint of the door main body 18 is released, and the door main body 18 can be further rotated along the arrow B direction, and can pass through the passage. This enables a forced breach, but it is an operation necessary to ensure the safety of a person who has attempted a breach.

Although such additional rotation of the door body 18 is not preferable in nature, even if such a situation occurs, the transmission mechanisms 32, 34, 36, and 3 are not used because the electromagnetic lock effect is low.
The load acting on 8, 42, and 44 is small, and damage to the transmission mechanism and other components can be prevented.

Further, a large force (impact force) acts instantaneously when the vehicle is forced through, but the output shaft 3 of the deceleration transmission mechanism 32
Since the rubber shaft joint 36 is interposed between the transmission shaft 4 and the transmission shaft 38, the impact force applied to the door body 18 is absorbed by the rubber shaft joint 36, and the speed reduction transmission mechanism 32 can be protected. Since the deceleration transmission mechanism 32 provided integrally with the electric motor 30 is vulnerable to impact, the rubber shaft coupling 36
Is extremely effective.

Further, when an impact force is applied to the door body 18,
When the cam roller 54 crosses the step surface 52c of the cam surface 52, the swing arm 56 flexes momentarily, and the second arc portion 5
An operation is performed to strike the cam roller 54 against 2b. As a result, a striking sound is generated, and the striking sound is transmitted to the device frame 1.
Since 2 resonates as a resonance box, it is possible to instantly notify station staff and the like that a situation such as a forced breakthrough has occurred.

As described above, in the door apparatus 10 according to the present invention, it is possible to forcibly push and open the door body 18 in the closed position. For reasons such as restricting traffic, it is preferable to provide the stopper 66 so that the door main body 18 cannot be pushed beyond a certain predetermined position. In the illustrated embodiment, a stopper 66 that engages with the side surface of the cam plate 50 is fixed on the base 26 (see FIG. 5). Further, as shown in FIGS. 2 to 5, a cushioning member 6 made of rubber or the like is provided at a portion of the stopper 66 which comes into contact with the cam plate 50.
Preferably, 8 is attached.

Since the electromagnetic lock of the electric motor 30 is maintained even after the door body 18 is pushed and opened from the closed position,
The door body 18 is maintained in a half-open state. When the station staff presses the release switch 64 to release this state, the control device 4
6 rotates the electric motor 30 in the reverse direction, whereby the door body 18 rotates in the direction opposite to the direction of the arrow B and returns to the open position, similarly to the normal opening operation.

Although the preferred embodiments of the present invention have been described in detail, it goes without saying that the present invention is not limited to the above embodiments. For example, depending on the material of the cam roller, etc., there is a case where no hitting sound is generated at the time of forcible breaking,
In such a case, means may be provided for detecting a forced breakthrough by a position sensor or the like and activating an alarm.
Although the above embodiment is a door device for a manned ticket gate at a station, the door device of the present invention can be applied to other uses such as an entrance gate at an amusement park or the like.

[0024]

As described above, according to the door apparatus of the present invention, the provision of the cam mechanism allows the door body to be accurately positioned at the closed position, and allows the door body to be used unless a considerable force is applied. Since it cannot be opened, it is possible to prevent a forced breakthrough or the like.

Further, when the voltage at the time of the electromagnetic lock is reduced, even if the door body is forcibly rotated with an excessive force, an excessive load is not applied to the transmission mechanism or the like. Thus, it is possible to prevent the components of the door device from being damaged.

Further, when the apparatus is configured to generate a loud mechanical sound at the time of a forced breach, it is possible to quickly process the forced breach, and it is also useful to show that it is difficult to breach the forced breach. .

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a main part of a door device according to the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, showing a state where the door body is at an open position.

FIG. 3 is a cross-sectional view taken along line AA of FIG. 1, showing a state where the door body is in a closed position.

FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1, showing a state where the door body has exceeded a closed position.

FIG. 5 is a cross-sectional view taken along the line AA of FIG. 1, showing a state where the door body has been stopped by a stopper beyond a closed position.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Door device, 12 ... Device frame, 18 ... Door body, 20 ... Support shaft, 30 ... Electric motor, 32 ... Deceleration transmission mechanism, 34 ... Output shaft, 36 ... Rubber shaft coupling, 38 ... Transmission shaft, 42,44 ... gears, 46 ... control devices (control means, electromagnetic lock means), 50 ... cam plates, 52 ... cam surfaces,
54: cam roller, 56: swing arm, 58: coil spring (elastic means), 66: stopper.

Claims (6)

[Claims] 1. An apparatus frame, a door body rotatably supported by a support shaft on the apparatus frame, and a door body attached to the apparatus frame, both directions of rotation from an open position to a closed position and opposite directions. An electric motor for rotating the door body; a transmission mechanism provided between a motor shaft of the electric motor and the support shaft of the door body; and an electric motor for rotating and braking the door body. A control means for controlling a motor; a cam plate fixed to the support shaft of the door body; and a cam roller which is swingably attached to the apparatus frame and has at one end a cam roller engaged with a cam surface of the cam plate. A moving arm; and elastic means for applying an elastic force to the other end of the swing arm so as to engage the cam roller with the cam surface. When the door body is in the closed position, the door body engages with the cam roller to restrict the movement of the door body in the rotation direction, but a force equal to or more than a predetermined value is applied to the door body in the rotation direction. A door device characterized in that, in such a case, the restraint is released by pushing the cam roller. 2. The door device according to claim 1, wherein the cam roller hits the cam surface at the moment when the restraint is released, and an impact sound is generated. 3. An electromagnetic lock means for applying a voltage lower than a braking voltage applied to the electric motor to electromagnetically lock the electric motor when the door main body is braked and placed in the closed position. Claim 1 characterized by the following:
Or the door device according to 2. 4. A flexible shaft coupling is provided on one of the shafts constituting the transmission mechanism.
The door device according to claim 1. 5. An apparatus frame, a door body rotatably supported by a support shaft on the apparatus frame, and both a direction of rotation from an open position to a closed position attached to the apparatus frame and a direction opposite thereto. An electric motor for rotating the door body; a transmission mechanism provided between a motor shaft of the electric motor and the support shaft of the door body; and an electric motor for rotating and braking the door body. Control means for controlling a motor; and electromagnetic locking means for electromagnetically locking the electric motor by applying a voltage lower than a braking voltage applied to the electric motor when the door body is braked and arranged in the closed position. And a door device. 6. The door device according to claim 5, wherein a flexible shaft coupling is provided on one of the shafts constituting the transmission mechanism.