JP7805982B2 - Door opening and closing device - Google Patents

Description

An embodiment of the present invention relates to a door opening and closing device.

Automated ticket gates are known for performing ticket gate operations in train stations and amusement facilities. Automatic ticket gates are typically used in pairs, with a passageway between them for users to pass through. Each automatic ticket gate has a housing, a door, and a door opening/closing mechanism that rotates the door. If a user presents or inserts an invalid ticket, the left and right doors close, preventing the user from entering the passageway. When these doors begin to close, they rotate at high speed, and after reaching the midpoint, they decelerate and rotate at a low speed. This reduces the impact that would occur if the door came into contact with a user.

Typically, the rotation position of each door is detected by multiple, e.g., three, detectors, and the door rotation speed is controlled based on the detection by the detectors. The multiple detectors detect the rotation position based on cams that rotate in conjunction with the opening and closing of the door. If the mounting position of the cam relative to the detector in one automatic ticket gate device is misaligned with the mounting position of the cam relative to the detector in the other automatic ticket gate device, the timing of the doors opening and closing may not match, or the closing positions may not be aligned.
Therefore, during manufacturing and maintenance inspection, it is necessary to adjust the cam mounting position so that the opening and closing timing and closed position of the pair of doors are synchronized. However, because the cam and detector are located inside the housing and their positions need to be adjusted in units of several millimeters, the adjustment work is both cumbersome and time-consuming.

Japanese Patent Application Laid-Open No. 2001-118091

The objective of this embodiment is to provide a door opening and closing device that can reduce work time during manufacturing and maintenance.

A door opening and closing device according to one embodiment includes a door that is rotatable around a pivot between an open position and a closed position , a motor that can rotate at a first rotation speed and a second rotation speed that is slower than the first rotation speed , a transmission mechanism that transmits the rotation of the motor to the pivot, a first cam and a second cam that are each rotatable in conjunction with the rotation of the motor, and includes a door opening and closing mechanism that opens and closes the door, a first detection unit that is switchable between ON and OFF by the first cam and is ON when the door is in a first range from the open position to a first predetermined position, and detects that the door is in the first range , and a second detection unit that is switchable between ON and OFF by the second cam. a second detection unit that is switchable between N and OFF, that is ON when the door is in a second range from a second predetermined position to the closed position, and that detects that the door is in the second range; and a controller that drives the motor at the first rotation speed when the door is rotated from the open position to the closed position, decelerates the motor to the second rotation speed when a first predetermined time has elapsed since the first detection unit turned OFF , and stops driving the motor when it is determined that a second predetermined time has elapsed since the second detection unit turned ON .

FIG. 1 is a perspective view showing an automatic ticket gate according to one embodiment. FIG. 2 is a plan view showing a state in which a plurality of automatic ticket gates according to the above embodiment are arranged side by side. FIG. 3 is a perspective view showing a door opening and closing device of the automatic ticket gate according to the embodiment. 4 is a side view of the door opening and closing device as seen from the arrow B shown in FIG. 3. FIG. FIG. 5 is a plan view showing the rotation shaft, the first cam, and the first detector when the door is in the open position. FIG. 6 is a plan view showing the rotation shaft, the first cam, and the first detector when the door is in the closed position. FIG. 7 is a plan view showing the rotation shaft, the second cam, and the second detector when the door is in the open position. FIG. 8 is a plan view showing the rotation shaft, the second cam, and the second detector when the door is in the closed position. FIG. 9 is a block diagram showing the control configuration of the automatic ticket gate according to the embodiment. FIG. 10 is a timing chart showing the closing operation of the door opening and closing device according to the embodiment. FIG. 11 is a flowchart showing the closing operation of the door opening and closing device according to the embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The disclosure is merely an example, and appropriate modifications that those skilled in the art can easily make while maintaining the spirit of the invention are naturally included within the scope of the present invention. Furthermore, to clarify the drawings and explanations, the width, thickness, shape, etc. of each part may be shown schematically compared to the actual embodiment, but these are merely examples and are not intended to limit the interpretation of the present invention. Furthermore, in this specification and each drawing, elements similar to those previously described with reference to the previous drawings may be designated by the same reference numerals, and detailed descriptions may be omitted where appropriate.
Hereinafter, an automatic ticket gate device according to one embodiment will be described in detail with reference to the drawings.

Fig. 1 is a perspective view showing an automatic ticket gate device 10 according to one embodiment. Fig. 2 is a plan view showing a state in which a plurality of automatic ticket gate devices 10 according to the embodiment are arranged side by side.
As shown in the figure, a first direction X, a second direction Y, and a third direction Z are defined, which are perpendicular to each other. The first direction X corresponds to the length direction of the automatic ticket gate device 10, the second direction Y corresponds to the width direction of the automatic ticket gate device 10, and the third direction Z corresponds to the height direction of the automatic ticket gate device 10.
The automatic ticket gate device 10 is installed, for example, at a ticket gate of a railway station, and performs ticket gate operations to permit or prohibit passage (entrance and exit) of users. The users include, for example, passengers (boarding and alighting passengers) using the railway, people entering and exiting the station premises, station staff, maintenance workers, etc.

As shown in Figures 1 and 2, the automatic ticket gate device 10 includes a housing 24, an insertion section 12, a reading section 14, an ejection section 16, a first display section 18a, a second display section 18b, door opening and closing devices 21a, 21b, multiple height detection sections 22, and multiple passage detection sections 23.
The housing 24 is formed, for example, in the shape of a substantially flat rectangular parallelepiped. The housing 24 has rectangular inner and outer surfaces 24a, 24b that face each other and are each substantially perpendicular to the installation surface, a top surface 24c that is positioned substantially parallel to the installation surface, one end surface 24d that is positioned at one end in the first direction X and is also substantially perpendicular, and another end surface 24e that is positioned at the other end in the first direction X and is also substantially perpendicular. Furthermore, the housing 24 has a sensor mounting portion 24f that is positioned on the outside and protrudes in the third direction Z beyond the top surface 24c.

On the top surface 24c, from one end to the other end in the first direction X, the input unit 12, the reading unit 14, the output unit 16, and the first display unit 18a are arranged side by side.
The insertion slot 12 is an insertion slot into which a magnetic ticket is inserted. The magnetic ticket is, for example, a magnetic train ticket.
The reading unit 14 reads information recorded on a medium. More specifically, the reading unit 14 reads ride information by wireless communication with the medium. The medium is, for example, a wireless IC card with an embedded IC (Integrated Circuit) chip, or an electronic device such as a smartphone. The ride information is, for example, identification information unique to the medium, user identification information, and various information related to the validity period, entry record, exit record, etc.
The discharge unit 16 is an outlet through which the magnetic ticket inserted from the insertion unit 12 is discharged.

The first display unit 18a has, for example, a display panel with a plurality of point light sources, and displays the results of the ticket gate processing on the display panel.
The second display unit 18b is provided on one end surface 24d of the housing 24. The second display unit 18b has, for example, a display panel having a plurality of point light sources, and displays information about the passage, such as whether or not it is possible to enter the passage PW (described later), on the display panel.

The door opening/closing devices 21a, 21b each have an openable/closable door 20a, 20b provided on the inner surface 24a of the housing 24, and a door opening/closing mechanism 30 (described below) that opens and closes the door. Door 20a is installed at one end in the first direction X, and door 20b is installed at the other end in the first direction X. Each door 20a, 20b is supported so that it can rotate around a pivot 19 that extends approximately perpendicular to the installation surface. As described below, each door 20a, 20b rotates between an open position P1, where it is flush with the inner surface 24a, and a closed position P2, where it is rotated a predetermined angle toward the aisle PW.

The multiple height detection units 22 are arranged side by side on the sensor mounting portion 24f of the housing 24. In one example, three height detection units 22 are provided. The height detection units 22 detect that a user whose height is equal to or greater than a predetermined height is passing through the passage PW. The height detection units 22 are sensors having a light-projecting unit and a light-receiving unit. The height detection units 22 detect users whose height is equal to or greater than a predetermined height by irradiating (projecting) light from the light-projecting unit and receiving light reflected by the subject with the light-receiving unit.
The plurality of passage detection units 23 are arranged side by side on the inner surface 24a of the housing 24. In one example, six passage detection units 23 are provided in the housing 24. The passage detection units 23 are sensors having a light-emitting unit and a light-receiving unit. The passage detection units 23 track and detect the position, traveling direction, etc. of users who enter the passage PW.

Two automatic ticket gates 10 are used as a set. In one example, as shown in Figure 2, the two automatic ticket gates 10 are arranged with the inner surfaces 24a of the housings 24 facing each other with a predetermined distance between them. In other words, one automatic ticket gate 10 is arranged in an orientation that is 180 degrees inverted relative to the other automatic ticket gate 10, and the first direction X faces in the opposite direction.

A passage PW through which users can pass is formed between the two automatic ticket gates 10. Users can enter the passage PW from both passage entrance E1 and passage entrance E2, as indicated by arrows A1 and A2. Note that the two automatic ticket gates 10 do not necessarily need to be arranged facing in opposite directions, and may also be arranged facing the same direction.
The door 20a of one automatic ticket gate device 10 faces the door 20b of the other automatic ticket gate device 10 across the passage PW. When the pair of doors 20a, 20b aligned on the left and right (second direction Y) rotate to the closed position P2, the doors 20a, 20b block the entrance to the passage PW, restricting users from entering.

Next, the door opening and closing devices 21a and 21b will be described in detail.
Since the door opening and closing devices 21a and 21b have the same configuration, the configuration of the door opening and closing device 21b will be described in detail as a representative, and a description of the door opening and closing device 21a will be omitted.
Fig. 3 is a perspective view showing the door opening/closing device 21b of the automatic ticket gate device 10 according to the embodiment. Fig. 4 is a side view of the door opening/closing device 21b as viewed from the arrow B shown in Fig. 3. In Fig. 3, the door 20b is in the open position P1, and in Fig. 4, the door 20b is in the closed position P2.

3 and 4 , the door opening and closing device 21b includes a door opening and closing mechanism 30 that opens and closes the door 20b. The door opening and closing mechanism 30 is housed inside the housing 24. The door opening and closing mechanism 30 includes a support member 33, a motor 32, a rotating shaft 38, gears 34 and 36, a rotating plate 47, a first cam 40, a second cam 42, a first detector 44, a second detector 46, and links 48 and 50.
The support member 33 integrally includes an upper wall 33a and a lower wall 33b that extend in the first direction X and face each other at a distance, and a side wall 33c that extends in the third direction Z and is connected to one end of the upper wall 33a and one end of the lower wall 33b. The support member 33 is fixed to the housing 24 and is disposed near the pivot 19.

The motor 32 is fixed to a side wall 33c of the support member 33. The motor 32 has a drive shaft 52 extending in the first direction X, which penetrates the side wall 33c and extends into the support member 33. A gear 34 is attached to the extending end of the drive shaft 52. The gear 34 is rotatable integrally with the drive shaft 52 around the drive shaft 52. The gear 34 is a bevel gear.
As will be described later, the motor 32 can rotate the drive shaft 52 at a first rotation speed V1 and a second rotation speed V2 that is slower than the first rotation speed V1. The motor 32 may also have a brake 31 that stops the rotation.

The rotation shaft 38 extends in a direction (in one example, the third direction Z) perpendicular to the drive shaft 52, and is rotatably supported by the upper wall 33 a and the lower wall 33 b. The rotation shaft 38 penetrates the upper wall 33 a and extends above the upper wall 33 a.
The gear 36 is fixed to the rotation shaft 38 inside the support member 33. The gear 36 can rotate integrally with the rotation shaft 38 around the rotation shaft 38. The gear 36 is a bevel gear, and is meshed with the gear 34. As a result, the rotation shaft 38 and the gear 36 rotate in conjunction with the rotation of the gear 34.

The rotating plate 47 has a circular shape and is provided at the extending end of the rotating shaft 38. The rotating plate 47 is positioned coaxially with the rotating shaft 38 and can rotate integrally with the rotating shaft 38. The rotating plate 47 is connected to the pivot 19 of the door 20b via links 48 and 50.
One end of the link 48 is rotatably connected to the outer periphery of the rotating plate 47, and the other end of the link 48 is rotatably connected to one end of a link 50. Furthermore, the other end of the link 50 is fixed to the pivot 19.

As described above, the door opening/closing mechanism 30 has a transmission mechanism that transmits the rotation of the motor 32 to the pivot 19, which comprises the rotatable rotary shaft 38 that is provided parallel to the pivot 19, the gear mechanism made up of the gears 34 and 36, and the crank mechanism made up of the links 48, 50, and the rotating plate 47. The gear mechanism rotates the rotary shaft 38 by the rotation of the motor 32, and the crank mechanism transmits the rotation of the rotary shaft 38 to the pivot.
More specifically, when the drive shaft 52 and the gear 34 are rotationally driven by the motor 32, the gear 36, the rotating shaft 38, and the rotating plate 47 are rotationally driven in conjunction with each other. As the rotating plate 47 rotates, the pivot 19 and the door 20b are rotated via the links 48, 50. The door 20b can rotate between an open position P1, where it is positioned substantially parallel to the inner surface of the housing 24, and a closed position P2, where it closes the passage PW.

The first and second detectors 44, 46 that detect the position of the door, and the first and second cams 40, 42 that operate the first and second detectors 44, 46 will now be described.
4, the first cam 40 is fixed to the rotary shaft 38 with a set screw 54 and is located below the gear 36. The second cam 42 is fixed to the rotary shaft 38 with a set screw 56 and is located below the first cam 40. The first cam 40 and the second cam 42 are rotatable in conjunction with the rotation of the motor 32 and rotate integrally with the rotary shaft 38.

In one example, the first detector 44 and the second detector 46 each comprise a microswitch. The first detector 44 and the second detector 46 are fixed to the support member 33. The first detector 44 is located adjacent to the first cam 40 in the first direction X. The second detector 46 is located below the first detector 44. The second detector 46 is located adjacent to the second cam 42 in the first direction X.

The first cam 40 rotates integrally with the rotary shaft 38 to switch the first detector 44. When the door 20b is in the open position P1, the first detector 44 is switched ON by the first cam 40 and outputs an ON signal.
The second cam 42 rotates integrally with the rotary shaft 38 to switch the second detector 46. When the door 20b is in the closed position P2, the second detector 46 is switched ON by the second cam 42 and outputs an ON signal.

Next, the first cam 40 and the first detector 44 will be described in detail.
FIG. 5 is a plan view showing the rotation shaft 38, the first cam 40, and the first detector 44 when the door 20b is in the open position P1.
As shown in Fig. 5, the first cam 40 has a protruding portion 58 that protrudes in a direction perpendicular to the third direction Z. The first detector 44 has a contact 60, a pushing portion 62, and a detector body 64. When the door 20b is in the open position P1, the protruding portion 58 comes into contact with the contact 60 and presses the contact 60 in the first direction X. As a result, the pushing portion 62 is pushed into the detector body 64 by the contact 60. As a result, the first detector 44 is set to ON and outputs an ON signal.

When the doors 20a, 20b start to close, the first cam 40 rotates in the direction of the arrow R. When the rotation shaft 38 rotates by the first angle θ1, the protrusion 58 separates from the contact 60, and the pressing of the pushing portion 62 by the contact 60 is released. This switches the first detection unit 44 OFF. The first angle θ1 is, for example, 30 degrees.
At this time, the door 20b is located at the first predetermined position P3 (see FIG. 3). The angle of the door 20b from the open position P1 to the first predetermined position P3 is approximately 13 degrees.

FIG. 6 is a plan view showing the rotation shaft 38, the first cam 40, and the first detector 44 when the door 20b is in the closed position P2.
6, after the contact between the protrusion 58 and the contactor 60 is released, the rotary shaft 38 and the first cam 40 rotate in the direction of arrow R until the door 20b moves to the closed position P2. While the door 20b moves from the first predetermined position P3 to the closed position P2, the first cam 40 does not come into contact with the first detector 44 (contactor 60), and the first detector 44 is maintained in the OFF state.

Because the first cam 40 and the first detection unit 44 are configured as described above, the first detection unit 44 can detect whether the door 20b is positioned in a first range from the open position P1 to the first predetermined position P3 based on whether the pushing portion 62 is pushed in.
The first range detected by the first detector 44 can be adjusted by loosening the set screw 54 and rotating the first cam 40. In other words, the first cam 40 is provided on the rotation shaft 38 so that its rotational position is adjustable, and by adjusting the rotational position of the first cam 40, the first range detected by the first detector 44 can be adjusted.

Next, the second cam 42 and the second detector 46 will be described in detail.
FIG. 7 is a plan view showing the rotation shaft 38, the second cam 42, and the second detector 46 when the door 20b is in the open position P1.
7, the second cam 42 has a protrusion 58, similar to the first cam 40. The second detection unit 46 has a contact 60, a pushing portion 62, and a detection unit main body 64, similar to the first detection unit 44. When the door 20b is in the open position P1, the protrusion 58 is not in contact with the contact 60. In other words, the second cam 42 (protrusion 58) is separated from the contact 60, and the pushing of the pushing portion 62 by the contact 60 is released. In other words, the second detection unit 46 is in the OFF state.

When the closing operation of the door 20b begins, the second cam 42 rotates in the direction of the arrow R. When the rotation shaft 38 rotates by the second angle θ2, the protrusion 58 comes into contact with the contactor 60 and presses the contactor 60 in the first direction X. As a result, the pressing portion 62 is pressed into the inside of the detection unit main body 64 by the contactor 60. The second angle θ2 is, for example, 125 degrees.
At this time, the door 20b is located at the second predetermined position P4 (see FIG. 3). The angle of the door 20b from the open position P1 to the second predetermined position P4 is approximately 75 degrees.

FIG. 8 is a plan view showing the rotation shaft 38, the second cam 42, and the second detector 46 when the door 20b is in the closed position P2.
8, after the protrusion 58 comes into contact with the contact 60, the rotation shaft 38 rotates until the doors 20a, 20b move to the closed position P2. While the doors 20a, 20b move from the second predetermined position P4 to the closed position P2, the second cam 42 comes into contact with the second detector 46 (contact 60), and the second detector 46 is maintained in the ON state.

Because the second cam 42 and the second detection unit 46 are configured as described above, the second detection unit 46 can detect whether the doors 20a, 20b are located in a second range from the second predetermined position P4 to the closed position P2 based on whether the pushing portion 62 is pushed in.
The second range detected by the second detector 46 can be adjusted by loosening the set screw 56 and rotating the second cam 42. In other words, the second cam 42 is provided on the rotation shaft 38 so that its rotational position is adjustable, and by adjusting the rotational position of the second cam 42, the second range detected by the second detector 46 can be adjusted.

Next, the control configuration of the automatic ticket gate device 10 will be described.
Figure 9 is a block diagram showing the control configuration of the automatic ticket gate device 10 according to the embodiment. As shown in Figure 9, the automatic ticket gate device 10 further includes a controller 80, a memory 82, a magnetic reader/writer 84, an IC reader/writer 86, and a timer 88. The controller 80 is connected to the motor 32, the first detector 44, the second detector 46, the height detector 22, the passage detector 23, the memory 82, the magnetic reader/writer 84, the IC reader/writer 86, and the timer 88.

The controller 80 is configured as a computer equipped with a CPU (Central Processing Unit), ROM (Read-Only Memory), RAM (Random-Access Memory), etc., and controls the overall operation of the automatic ticket gate device 10, including the operation of the motor 32, magnetic reader/writer 84, IC reader/writer 86, and timer 88, by executing programs stored in the ROM.

The controller 80 makes the following determinations.
The controller 80 determines the position and direction of travel of the user based on the information obtained by the passage detection unit 23. The controller 80 determines whether the user is an adult or a child based on the information obtained by the height detection unit 22.
The controller 80 determines whether the information recorded on the magnetic ticket, IC card, etc., such as the travel section and usage period, is correct based on the information obtained by the magnetic reading and writing unit 84 and the IC reading and writing unit 86. The magnetic reading and writing unit 84 reads and writes to the magnetic ticket inserted from the insertion unit 12. The IC reading and writing unit 86 reads and writes to the medium held over the reading unit 14.
The controller 80 determines whether or not the user is permitted to pass through the passage PW, taking the above-mentioned determination into consideration. If it determines that the user is not permitted to pass through the passage PW, the controller 80 drives the door opening/closing devices 21 a and 21 b to start the closing operation of the doors 20 a and 20 b.

The timer 88 counts a predetermined time and outputs a detection signal to the controller 80 when the predetermined time is reached. The timer 88 counts the time that has elapsed since the rotation positions of the doors 20a, 20b have reached an arbitrary position. For example, the timer 88 is set to count a first predetermined time T1 after the doors 20a, 20b reach a first predetermined position P3. The timer 88 is also set to count a second predetermined time T2 after the doors 20a, 20b reach a second predetermined position P4.
The memory 82 stores the control program of the controller 80, fare data for calculating fees, etc. The memory 82 stores information obtained by the first detection unit 44 and the second detection unit 46. The memory 82 is formed of a commonly known storage medium such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive).

Next, the process performed by the automatic ticket gate device 10 when the doors 20a and 20b are closing will be described.
Fig. 10 is a timing chart of the closing operation of the door opening and closing devices 21a and 21b according to the embodiment, and Fig. 11 is a flowchart of the closing operation of the door opening and closing devices 21a and 21b according to the embodiment.
10, the angles of the doors 20a, 20b and the rotation angle of the rotation shaft 38 in the initial state (open position) are set to 0 degrees. At this time, the first detection unit 44 is ON, and the second detection unit 46 is OFF.

As described above, when the controller 80 determines that the user should not pass through the passage PW, it drives the door opening and closing devices 21a and 21b to initiate the closing operation of the doors 20a and 20b. That is, as shown in FIG. 11, when the closing operation of the doors 20a and 20b is initiated, the controller 80 rotates the drive shaft 52 of the motor 32 at a first rotational speed V1 (S1). The first rotational speed V1 is, for example, 1300 rpm.

Next, the controller 80 determines whether the first detector 44 is OFF (S2). If the first detector 44 is ON, the controller 80 executes step S2 again.
When the rotating shaft 38 and the first cam 40 rotate from the initial position by a first angle θ1 (for example, 30 degrees), the first cam 40 moves away from the first detection unit 44, and the first detection unit 44 turns OFF.
When it is determined that the first detection unit 44 is OFF (S2), the controller 80 activates the timer 88 and starts counting the first predetermined time T1 (S3). The timer 88 outputs a detection signal to the controller 80 when the first predetermined time T1 has elapsed.

Next, the controller 80 determines whether a first predetermined time T1 has elapsed since the first detector 44 was turned OFF (S4). When the controller 80 receives a detection signal from the timer 88 and determines that the first predetermined time T1 has elapsed since the first detector 44 was turned OFF, the controller 80 reduces the rotational speed of the motor 32 to a second rotational speed V2 (S5). The second rotational speed V2 is, for example, 750 rpm.
If it is determined that the first predetermined time T1 has not elapsed (S4), the controller 80 executes step S4 again.

Next, the controller 80 determines whether the second detector 46 is ON (S6). If the second detector 46 is OFF, the controller 80 executes step S6 again.
When the rotating shaft 38 and the second cam 42 rotate by the second angle θ2 (125 degrees in one example) from the initial position, the second cam 42 comes into contact with the second detector 46, and the second detector 46 turns ON.
When it is determined that the second detection unit 46 is ON (S6), the controller 80 activates the timer 88 and starts counting the second predetermined time T2 (S7). The timer 88 outputs a detection signal to the controller 80 when the second predetermined time T2 has elapsed.

Next, the controller 80 determines whether a second predetermined time T2 has elapsed since the second detection unit 46 was turned ON (S8). When the controller 80 receives a detection signal from the timer 88 and determines that the second predetermined time T2 has elapsed since the second detection unit 46 was turned ON, the controller 80 stops driving the motor 32 (S9). Specifically, the controller 80 drives the brake 31 provided in the motor 32 to stop the rotation of the drive shaft 52. The brake 31 may be a regenerative brake that converts the rotation of the motor 32 into electrical energy, or a friction brake that converts the rotation of the motor 32 into thermal energy.
As a result of the above, the doors 20a and 20b are rotated from the open position P1 to the closed position P2.

The effects of this embodiment will be described.
According to the door opening and closing devices 21a, 21b of this embodiment, the door opening and closing devices 21a, 21b are equipped with a first detection unit 44 that is switched ON and OFF by a first cam 40, and a controller 80 that decelerates the motor 32 when a first predetermined time T1 has elapsed since the first detection unit 44 turned OFF when the doors 20a, 20b are rotated from the open position P1 to the closed position P2.
This allows the opening/closing timing and closing position of the doors 20a, 20b to be adjusted in accordance with the first predetermined time T1, thereby reducing the time required for mechanically adjusting the positions of the second cam 42 and the second detector 46. In other words, a door opening/closing device can be obtained that can reduce the work time required during manufacturing and maintenance.
Furthermore, the door opening and closing devices 21a and 21b can be configured without the detector for detecting the position where the doors 20a and 20b are to be decelerated. More specifically, a door opening and closing device that can perform the closing operation using only two detectors, the first detector 44 and the second detector 46, can be obtained, thereby reducing the number of parts and the cost.

The second detector 46 detects the rotational positions of the doors 20a and 20b according to the rotation angle of the second cam 42. Therefore, if the positions of the doors 20a and 20b are forcibly shifted by a user, the second detector 46 turns OFF, and it can be detected that the doors 20a and 20b have rotated further back than the closed position P2.
Furthermore, the second predetermined position P4 and the closed position P2 detected by the second detector 46 can be adjusted by changing the mounting position of the second cam 42. This makes it possible to easily adjust the closed position P2 even if the closed position P2 of the doors 20a, 20b is forcibly shifted.

Although embodiments of the present invention have been described, the above embodiments are presented as examples and are not intended to limit the scope of the invention. The novel embodiments described above can be embodied in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. The above embodiments and their variations are within the scope and spirit of the invention, and are also included in the invention and its equivalents as set forth in the claims.

10...automatic ticket gate, 19...pivot, 20a, 20b...door, 21a, 21b...door opening/closing device, 30...door opening/closing mechanism, 31...brake, 32...motor, 38...rotating shaft, 40...first cam, 42...second cam, 44...first detector, 46...second detector, 52...drive shaft, 80...controller, 88...timer, P1...open position, P2...closed position, P3...first predetermined position, P4...second predetermined position, T1...first predetermined time, T2...second predetermined time.

Claims (6)

a door that is pivotable about a pivot axis between an open position and a closed position;
a door opening/closing mechanism for opening and closing the door, the door opening/closing mechanism including a motor rotatable at a first rotation speed and a second rotation speed slower than the first rotation speed, a transmission mechanism for transmitting the rotation of the motor to the pivot, and a first cam and a second cam respectively provided rotatably in conjunction with the rotation of the motor;
a first detection unit that is provided so as to be switchable between ON and OFF by the first cam, is ON when the door is in a first range from the open position to a first predetermined position, and detects that the door is in the first range;
a second detection unit that is provided so as to be switchable between ON and OFF by the second cam, is ON when the door is in a second range from a second predetermined position to the closed position, and detects that the door is in the second range;
a controller that drives the motor at the first rotation speed when the door is rotated from the open position to the closed position, decelerates the motor to the second rotation speed when a first predetermined time has elapsed since the first detection unit turned OFF, and stops driving the motor when it is determined that a second predetermined time has elapsed since the second detection unit turned ON .
Door opening and closing device. a timer in which the first predetermined time is set;
the controller starts counting by the timer when the first detection unit is turned OFF, and decelerates the motor to the second rotation speed when the first predetermined time has been counted;
The door opening and closing device according to claim 1. the door opening/closing mechanism further includes a brake for stopping the motor;
the controller, when rotating the door from the open position to the closed position, stops the rotation of the motor by the brake if the second predetermined time has elapsed since the second detection unit was turned on;
The door opening and closing device according to claim 1. a timer in which the second predetermined time is set;
the controller starts counting by the timer when the second detection unit is turned on, and stops rotation of the motor by the brake when the second predetermined time has been counted;
The door opening and closing device according to claim 3. the transmission mechanism includes a rotatable rotary shaft that is provided parallel to the pivot shaft, a gear mechanism that rotates the rotary shaft by rotation of the motor, and a crank mechanism that transmits the rotation of the rotary shaft to the pivot shaft;
the first cam and the second cam are each provided on the rotation shaft so as to be rotatable integrally with the rotation shaft;
The door opening and closing device according to claim 1. the first cam and the second cam are provided on the rotation shaft so that their rotation positions are adjustable, and the second range detected by the second detection unit can be adjusted by adjusting the rotation position of the second cam.
The door opening and closing device according to claim 5.