Electric door closer

Abstract

To provide an electric door closer that is excellent in responding to user needs. [Solution] The system includes a control unit having an automatic opening / closing mode in which the door 1 is opened from the fully closed position to the fully open position 91, then held in the fully open position 91 by the brake for a predetermined stopping time, and then closed back to the fully closed position, and a fully open continuous mode in which the door 1 is held in the fully open position 91 by the brake for longer than the stopping time, a changeover switch to switch the fully open continuous mode ON and OFF, and an external terminal to which an open door signal is input. The fully open continuous mode includes a fully open return control that returns the door 1 to the fully open position 91 when the door 1 is shifted by a predetermined angle or more relative to the fully open position 91. The control unit switches from the automatic opening / closing mode to the fully open continuous mode when the changeover switch is ON and an open door signal is input when the stopping time has elapsed at the fully open position 91.

Description

[Technical Field]

[0001] This invention relates to an electric door closer that electrically opens and closes a rotating door. [Background technology]

[0002] The applicant has already proposed an electric door closer that electrically opens and closes a door, as in Patent Document 1 below. The door automatically opens from a fully closed position to a preset fully open position, and after being held in the fully open position for a predetermined time, automatically closes to the fully closed position. When passing through a door opening, the manner of passage varies depending on the site, situation, etc., and an electric door closer that can flexibly respond to various needs is required. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7051558 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention aims to provide an electric door closer that excels at meeting the needs of users. [Means for solving the problem]

[0005] The electric door closer of the present invention is an electric door closer that electrically opens and closes a door that rotates around a predetermined axis, and is equipped with an electric drive unit that drives the door to open and close, a control unit that has an automatic opening / closing mode that controls the electric drive unit to open the door from a fully closed position to a fully open position, hold the brake at the fully open position for a predetermined stop time, and then close it to the fully closed position, and a full open continuation mode that continues to hold the brake at the fully open position beyond the stop time, a selector switch that switches the full open continuation mode on and off, and an external terminal to which an open door signal is input, and the full open continuation mode includes a full open return control that returns the door to the fully open position when the door deviates by more than a predetermined deviation angle from the fully open position, and the control unit executes the automatic opening / closing mode when the selector switch is off, and transitions from the automatic opening / closing mode to the full open continuation mode when the selector switch is on and an open door signal is input at the fully open position when the stop time has elapsed, and does not transition to the full open continuation mode but executes the automatic opening / closing mode when the selector switch is on and an open door signal is input at the fully open position when the stop time has elapsed,

[0006] The electric door closer with this configuration is equipped with a continuous full-open mode. It also has a selector switch for switching the continuous full-open mode ON and OFF. By operating the selector switch, users, including installers, can freely select and set the continuous full-open mode according to the site and circumstances. It also has an external terminal, which can be connected to an external device. Examples of external devices include a start switch for a passerby to issue a door-open command, a wireless device, a personal computer, etc.

[0007] For example, when an open door signal is input from an external device, the control unit opens the door from the fully closed position to the fully open position and holds the brake at the fully open position for a predetermined stop time. Then, after the stop time has elapsed, the door closes from the fully open position to the fully closed position. Note that if the continuous full open mode is set to OFF, even if an open door signal is input from an external device when the stop time has elapsed at the fully open position, the control unit will not switch to the continuous full open mode but will execute the automatic opening / closing mode.

[0008] On the other hand, if the continuous full-open mode is set to ON, the control unit switches from the automatic opening / closing mode to the continuous full-open mode when the stop time has elapsed in the fully open position, provided that an open door signal is input. In the continuous full-open mode, the control unit continues to brake and hold the door in the fully open position. The control unit maintains the continuous full-open mode as long as the open door signal is input.

[0009] The continuous full-open mode includes a return-to-full-open control. Therefore, if a strong external force, such as a strong wind, acts on the door, causing the door to deviate by a predetermined angle from the fully open position, the control unit returns the door to the fully open position. This ensures smooth passage even in situations where people are passing through continuously.

[0010] If the door open signal is interrupted while the door is held in the fully open position, the control unit will end the continuous full open mode, switch to the automatic opening / closing mode, and close the door to the fully closed position. Also, even if the continuous full open mode is set to ON, if the open door signal is not input when the stop time has elapsed in the fully open position, the control unit will not switch to the continuous full open mode and will close the door to the fully closed position.

[0011] In particular, in the continuous full-open mode, it is preferable that the control unit brake and hold the door at that position without performing full-open return control when the door deviates from the fully open position by less than a predetermined angle. With this configuration, the angular range from the fully open position that is less than the predetermined angle is defined as the non-interference zone. Therefore, the door does not swing frequently near the fully open position, providing a sense of security and facilitating control. Furthermore, since the door is braked and held at a deviated angular position in the non-interference zone, its positioning ability against external forces is high, and a stable door open state can be achieved.

[0012] Furthermore, in the continuous full-open mode, the control unit preferably returns the door to the fully open position when the door deviates from the fully open position in the opening direction by a first deviation angle or more, and when the door deviates from the fully open position in the closing direction by a second deviation angle or more, the second deviation angle being smaller than the first deviation angle. With this configuration, the control unit returns the door to the fully open position both when the door deviates from the fully open position in the opening direction and when the door deviates in the closing direction. Meanwhile, the first deviation angle in the opening direction and the second deviation angle in the closing direction are not the same, and the control unit does not react sensitively to positional deviations in the opening direction and tolerates large deviation angles. This reduces frequent door swing. Conversely, the control unit reacts sensitively to positional deviations in the closing direction, returning the door to the fully open position even with a relatively small deviation angle. This ensures a clear passage area through the opening, ensuring smooth passage. [Effects of the Invention]

[0013] As described above, by providing a changeover switch and external terminals, the control unit can flexibly switch modes in response to the setting status of the changeover switch and the input status of the door open signal from the outside, thereby improving its ability to respond to on-site conditions and user needs. [Brief explanation of the drawings]

[0014] [Figure 1] A schematic diagram showing the usage state of an electric door closer in one embodiment of the present invention. [Figure 2] Enlarged view of the main part of Figure 1. [Figure 3] Enlarged view of the main components of the electric door closer. [Figure 4] 4A and 4B are schematic plan views for explaining the operation of a door equipped with the electric door closer. DETAILED DESCRIPTION OF THE INVENTION

[0015] The following describes an electric door closer according to one embodiment of the present invention, with reference to Figures 1 to 4. The electric door closer opens and closes a door 1 electrically. Figure 1 shows the overall configuration of the electric door closer. In Figure 1, a left-opening (left-handed) door 1 is shown as an example, but a right-opening (right-handed) door 1 may also be used. The electric door closer of this embodiment supports both left and right-handed doors, and the handedness can be selected by a changeover switch 51, which will be described later. The door 1 rotates around a predetermined axis, specifically, it rotates horizontally around a vertical axis. The door 1 is rotatably attached to the door frame 2 via a hinge (not shown). An electric latch may also be attached to the door 1.

[0016] The electric door closer includes a main body 3 attached to the door 1, a link mechanism 4 connecting the main body 3 to the door frame 2, and a power supply device 5 supplying power from a commercial power source 9 to the main body 3. The main body 3 is attached to the upper front surface of the door 1 near the hinge. The main body 3 is attached to the door 1 via a mounting plate (not shown). The main body 3 includes a main shaft 10, an electric drive unit 11 that drives the main shaft 10 to open and close the door 1, a control unit 12 that controls the electric drive unit 11, and a main body interface 13 for connection to an external device. A first external terminal 31 (described later) is arranged on the main body interface 13. As shown in FIG. 2 , the link mechanism 4 includes an arm 6, a link 7, and a bracket 8.

[0017] <Power supply device 5> The power supply device 5 is disposed between the main body 3 and a commercial power source 9. The power supply device 5 is a power supply path that supplies power to the main body 3. The commercial power source 9 is, for example, an AC 100V power source wired to a building. One end of the power supply device 5 is connected to the commercial power source 9, and the other end is connected to the main body 3.

[0018] The power supply device 5 includes a first cord 20, an AC adapter 21, a second cord 22, a junction box 23, and a third cord 24. The first cord 20 connects the commercial power source 9 to the AC adapter 21. The first cord 20 includes a power plug 25, which is inserted into a socket (outlet) of the commercial power source 9. The socket of the commercial power source 9 is installed on a wall surface of a building. The first cord 20 is connected to the AC adapter 21. The AC adapter 21 converts AC power input from the commercial power source 9 into DC power and outputs the DC power. For example, it converts AC 100 V into DC 12 V. The AC adapter 21 is attached, for example, to the vertical frame 2b of the door frame 2 or to a wall surface nearby. The second cord 22 connects the AC adapter 21 to the junction box 23.

[0019] The relay box 23 is installed near the main unit 3. The relay box 23 is installed, for example, on the top of the vertical frame 2b of the door frame 2, the upper frame 2a of the door frame 2, or on a nearby wall surface. In other words, the relay box 23 is installed on a fixed part such as the door frame 2 or a wall surface.

[0020] The relay box 23 houses a secondary battery 26, a circuit board 27, and a second external terminal 32. The secondary battery 26 is for supplying power to the main body 3 in the event of a power outage. The secondary battery 26 may be provided in the main body 3. The circuit board 27 controls switching between charging and discharging the secondary battery 26. The circuit board 27 discharges power from the secondary battery 26 in the event of a power outage, and charges the secondary battery 26 when electricity is being supplied (normal operation) without a power outage.

[0021] The third cord 24 connects the relay box 23 and the main unit 3. The third cord 24 is preferably made of a flexible cord, such as a coiled cord (spring cord). The third cord 24 has power lines and signal lines.

[0022] The electric door closer is equipped with external terminals to which external devices are connected. In this embodiment, the external terminals include a first external terminal 31 and a second external terminal 32. The first external terminal 31 is provided on the main unit 3, and the second external terminal 32 is provided on the relay box 23. The first external terminal 31 and the second external terminal 32 are input / output terminals. Signals from external devices are input to the first external terminal 31 and the second external terminal 32, or signals are output from there to the external device. The external devices can be various, but typical examples include electric locks, monitoring sensors such as human detection sensors that monitor the area near the door 1, activation switches such as touch sensors, push buttons, or non-contact buttons for passersby to give instructions to open the door, wireless devices that receive or transmit wireless media such as radio waves or infrared rays, and personal computers (PCs).

[0023] External devices are connected to either the first external terminal 31 or the second external terminal 32. When two types of external devices are connected, the first and second external devices are each connected to either the first external terminal 31 or the second external terminal 32. For example, both the first and second external devices may be connected to the first external terminal 31, or both may be connected to the second external terminal 32, or the first external device may be connected to the first external terminal 31 and the second external device may be connected to the second external terminal 32. The control unit 12 receives signals from the external devices and drives the electric drive unit 11. The control unit 12 may also output signals to the external devices.

[0024] The second external terminal 32 of the relay box 23 is connected to the first external terminal 31 of the main interface 13 via the signal line of the third code 24. The first external terminal 31 is connected to the control unit 12. In other words, the second external terminal 32 is connected to the control unit 12 via the first external terminal 31. Alternatively, the second external terminal 32 may be connected directly to the control unit 12 without being connected to the first external terminal 31.

[0025] <Spindle 10> The main shaft 10 rotates about its vertical axis. One end of the arm 6 is connected to the upper end of the main shaft 10. The arm 6 rotates together with the main shaft 10. The arm 6 rotates horizontally about the main shaft 10. The other end of the arm 6 is rotatably connected to one end of the link 7. The other end of the link 7 is rotatably connected to the bracket 8. The bracket 8 is attached to the lower surface of the upper frame 2a of the door frame 2.

[0026] <Electric drive unit 11> The electric drive unit 11 includes a motor 41 for driving the spindle 10 and a transmission mechanism for transmitting the rotation of the motor 41 to the spindle 10. The motor 41 is, for example, a brushless DC motor. The stator of the motor 41 is a coil, and the rotor of the motor 41 is a permanent magnet. The motor 41 is equipped with a Hall element (not shown). The Hall element detects the position of the rotor by detecting the magnetic field of the rotor and outputs a detection signal. The detection signal is sent to the control unit 12. The control unit 12 drives the motor 41 based on the output signal of the Hall element. The control unit 12 supplies current to the coils of the motor 41 to drive the motor 41 in accordance with the rotational position of the rotor of the motor 41. The motor 41 has a rotation axis (center line) that runs in the left-right direction. The motor 41 is equipped with a motor shaft 42 on the rotation axis. The motor shaft 42 rotates integrally with the rotor.

[0027] A transmission mechanism is provided between the motor shaft 42 and the main shaft 10. The transmission mechanism includes a torque limiter 43 and a gear mechanism. The torque limiter 43 is mounted on the tip of the motor shaft 42. The torque limiter 43 uses the motor shaft 42 as its input shaft. The torque limiter 43 has an output shaft 44 coaxial with the motor shaft 42. Normally, the motor shaft 42 and the output shaft 44 rotate synchronously. If an excessive load is applied to the output shaft 44, the torque limiter 43 slips, creating a rotational difference between the output shaft 44 and the motor shaft 42. A gear mechanism is provided between the output shaft 44 of the torque limiter 43 and the main shaft 10. A first gear 45 is fixed to the output shaft 44 of the torque limiter 43, and the first gear 45 meshes with a second gear 46 located at the bottom of the main shaft 10. The first gear 45 and the second gear 46 constitute the gear mechanism. The first gear 45 and the second gear 46 convert the rotation of the output shaft 44 around its left-right axis into rotation of the main shaft 10 around its up-down axis. An encoder (not shown) is provided on the output shaft 44 of the torque limiter 43. The encoder detects the rotation of the output shaft 44 and outputs a detection signal. The detection signal is sent to the control unit 12. Based on the output signal of the encoder, the control unit 12 determines the position, speed, and direction of the door 1 and controls the motor 41.

[0028] <Control Unit 12> The control unit 12 is disposed on the opposite side of the motor 41 from the main shaft 10. The control unit 12 is equipped with an operation unit that is operated by the user. FIG. 3 shows the operation unit. The operation unit may have various shapes, numbers, and types, but in this embodiment, it is equipped with a power switch 50 that switches the power on and off, a selector switch 51 that switches between various setting conditions, and an adjustment knob 52 that is rotated to adjust various setting conditions such as the opening and closing speed of the door 1. The operation unit is equipped with an indicator 53 that indicates that the power is on. The indicator 53 lights up when the power switch is turned on.

[0029] Although the number of selector switches 51 may be one, in this embodiment, multiple selector switches 51 are provided, specifically, four are provided. The number of switchable setting items is determined by the number of selector switches 51. When four selector switches 51 are provided, a total of four setting items, first to fourth, can be switched. The setting items switched by the selector switches 51 may be various, but in this embodiment, one of the four selector switches 51 is assigned with a setting of whether or not to continue to hold the door 1 in the fully open position 91. In this embodiment, as will be described later, the control unit 12 has a continuous full open mode that continues to hold the door 1 in the fully open position 91, and the continuous full open mode can be switched ON and OFF by the selector switches 51. Note that other setting items of the selector switches 51 include, for example, switching the direction of the door 1.

[0030] There may be only one adjustment knob 52, but in this embodiment, multiple adjustment knobs, specifically seven, are provided. The adjustment knob 52 can be rotated, for example, with a fingertip, or by inserting the tip of a tool such as a screwdriver into the groove on the tip surface of the adjustment knob 52. Various items can be adjusted using the adjustment knob 52, such as the fully open position 91, the stop time at the fully open position 91, the speed in the opening direction, the speed in the closing direction, and the angular position at which the speed changes.

[0031] <Automatic opening / closing mode> The control unit 12 has an automatic opening / closing mode as a control mode for controlling the motor 41 to open and close the door 1. In the automatic opening / closing mode, the door 1 is opened from the fully closed position 90 to a preset fully open position 91, as shown in FIG. 4(a), and then the door 1 is braked at the fully open position 91 for a preset stopping time, and then closed to the fully closed position 90. The fully open position 91 is set by the adjustment knob 52. The automatic opening / closing mode includes automatic opening control, brake control for the fully open position 91, and automatic closing control. The automatic opening control is a control for opening the door 1 from the fully closed position 90 to the fully open position 91. The automatic opening control may be performed by a single unified control over the operating range from the fully closed position 90 to the fully open position 91, or the operating range may be divided into multiple sections and different controls may be performed for each section. The speed in the automatic opening control is set by the adjustment knob 52. The automatic closing control is a control for closing the door 1 from the fully open position 91 to the fully closed position 90. The automatic closing control may be performed with one unified control over the operating range from the fully open position 91 to the fully closed position 90, or the operating range may be divided into multiple sections and different controls may be performed for each section. The speed in the automatic closing control is set by the adjustment knob 52.

[0032] <Standby mode> The electric door closer is equipped with a full-close sensor (not shown). The full-close sensor detects that the door 1 is at the full-close position 90 and sends a detection signal to the control unit 12. The full-close sensor is, for example, a photoelectric sensor, and is disposed, for example, on the upper part of the main shaft 10. When the door 1 is closed to the full-close position 90, the full-close sensor detects that the door 1 has reached the full-close position 90 and sends a detection signal to the control unit 12. Upon receiving the signal from the full-close sensor, the control unit 12 stops driving the motor 41, resets the stored full-close position 90, and stores the full-close position 90 again. Then, the control unit 12 transitions to standby mode. In standby mode, the control unit 12 brakes the motor 41 to brake and hold the door 1 at the full-close position 90. Note that if the door 1 is provided with an electric latch, it is not necessary to brake and hold the door 1 at the full-close position 90 in standby mode.

[0033] <Door opening activation> The electric door closer starts to open the door when an open door signal is input from an external device to an external terminal. That is, the control unit 12 shifts from standby mode to automatic opening control in automatic opening / closing mode and automatically opens the door 1. If the door 1 is equipped with an electric latch, when an open door signal is input in standby mode, the electric latch is automatically released electrically. When an open door signal is input from an external device to an external terminal, the control unit 12 starts to open the door regardless of the signal from the encoder. The open door signal is input, for example, from a start switch, a wireless device, or a PC.

[0034] The electric door closer also starts to open when the door 1 is pushed manually. When the door 1 is manually pushed and rotated, the control unit 12 receives a signal from the encoder. When the control unit 12 recognizes from the signal from the encoder that the door 1 has opened to a preset angle, it starts to open the door. Note that although the signal from the encoder determines whether the door 1 should move, stop, and move in which direction, this determination may also be made using a signal from a hall element. Note that if the door 1 is equipped with an electric latch, the electric latch must be manually released before the door 1 can be pushed.

[0035] When the door 1 is opened to the fully open position 91 by the automatic opening control, the control unit 12 stops the rotation of the motor 41 and brakes the motor 41 to stop the door 1. At the fully open position 91, the motor 41 is braked to hold the door 1 at the fully open position 91. When a preset stop time has elapsed at the fully open position 91, the control shifts to automatic closing control. The stop time at the fully open position 91 can be adjusted using the adjustment knob 52.

[0036] <Continuous full-throttle mode> The control unit 12 has a full-open continuous mode as a control mode. The full-open continuous mode is a control mode in which the door 1 is held in the fully open position 91 by the brake beyond a set stopping time. In the full-open continuous mode, even after the stopping time has elapsed, the door 1 is held in the fully open position 91 by the brake. As described above, in the automatic opening and closing mode, the control unit 12 opens the door 1 to the fully open position 91 and holds the door 1 by the brake at the fully open position 91 for a set stopping time. Then, when the stopping time has elapsed, the control unit 12 determines whether the predetermined conditions for full-open continuous mode have been met. If the predetermined conditions have been met, it switches to the full-open continuous mode; if the conditions have not been met, it does not switch to the full-open continuous mode and performs automatic closing control.

[0037] There are two conditions for switching to the fully open continuous mode. First, the changeover switch 51, which switches the setting to the fully open continuous mode, is turned ON. Second, an open door signal is input when the stop time has elapsed. The control unit 12 determines whether both of these conditions are met, and if they are, it switches to the fully open continuous mode. After switching to the fully open continuous mode, the fully open continuous mode is maintained as long as the open door signal continues to be input. Therefore, if the open door signal is interrupted, the fully open continuous mode is terminated at that point, and the system returns to automatic closing control to close door 1.

[0038] As described above, in the fully open continuous mode, the control unit 12 continues to hold the door 1 in the fully open position 91 using the brake. When the rotating door 1 is in the fully open position 91, it may be hit by, for example, a strong wind. Also, another object may collide with or come into contact with the door 1 in the fully open position 91, and an external force greater than the braking force may act on the door 1 in the fully open position 91. When a large external force acts on the door 1 in the fully open position 91, the door 1 may shift in the opening or closing direction.

[0039] In the fully open continuous mode, the control unit 12 returns the door 1 to the fully open position 91 if the door 1 has shifted by a predetermined angle or more relative to the fully open position 91. In other words, the fully open continuous mode has a fully open return control that returns the door 1, which has shifted from the fully open position 91, to the fully open position 91. The angle of shift from the fully open position 91 is determined by the signal from the encoder.

[0040] When the control unit 12 switches from the automatic opening / closing mode to the continuous full-open mode, it continues to check the angle of deviation of the door 1 from the fully open position 91. Then, as shown in Figure 4(b), when the door 1 deviates by a first deviation angle of 101 or more in the opening direction relative to the fully open position 91, it drives the motor 41 in the closing direction to return the door 1 to the fully open position 91. Once the door 1 has returned to the fully open position 91, the control unit 12 stops the motor 41 and applies a brake to the motor 41 to hold the door 1 in place.

[0041] Furthermore, when the door 1 deviates from the fully open position 91 in the closing direction by a second deviation angle 102 or more, the control unit 12 drives the motor 41 in the opening direction to return the door 1 to the fully open position 91. When the door 1 returns to the fully open position 91, the control unit 12 stops the motor 41 and brakes the motor 41 to hold the door 1 in place.

[0042] The first misalignment angle 101, i.e., the misalignment angle in the opening direction, and the second misalignment angle 102, i.e., the misalignment angle in the closing direction, are both arbitrary, but it is preferable that the first misalignment angle 101 is greater than the second misalignment angle 102. It is preferable that the first misalignment angle 101 is set to more than twice the second misalignment angle 102. For example, the first misalignment angle 101 is set to 28 degrees in terms of the rotation angle of the main shaft 10 (arm 6), and the second misalignment angle 102 is set to 8 degrees in terms of the rotation angle of the main shaft 10.

[0043] On the other hand, in the fully open continuous mode, the control unit 12 holds the door 1 in a brake position at the shifted angle without performing full-open return control when the shift angle of the door 1 with respect to the fully open position 91 is less than a predetermined shift angle. That is, in the opening direction, if the door 1 is shifted from the fully open position 91 by less than the first shift angle 101, the door 1 is held in a brake position at that position. As in the example above, if the first shift angle 101 is set to 28 degrees, the door 1 will be held in a brake position at a shift angle of less than 28 degrees. Therefore, for example, if the door 1 is shifted 10 degrees in the opening direction relative to the fully open position 91, it will be held in a brake position at that 10-degree shift, and even if it is shifted another 10 degrees in the opening direction from that 10-degree shift position, resulting in a total shift of 20 degrees in the opening direction relative to the fully open position 91, it will be held in a brake position at that 20-degree shift. Furthermore, even if the door shifts 15 degrees in the closing direction from the 20-degree shifted position, resulting in a total shift of 5 degrees in the opening direction relative to the fully open position 91, the brake will be held in that position. Thus, in the above example, within the range of a shift angle of less than 28 degrees in the opening direction relative to the fully open position 91, the control unit 12 will not return the door 1 to the fully open position 91, but will hold it in the shifted position with the brake.

[0044] The same applies when door 1 is shifted in the closing direction; if door 1 is shifted by a second shift angle of less than 102 degrees from the fully open position 91, door 1 is held in place by the brake at that position. In the example above, within the range of a shift angle of less than 8 degrees in the closing direction relative to the fully open position 91, door 1 is not returned to the fully open position 91, but is held in place by the brake at the shifted position.

[0045] If we express the closing direction as negative and the opening direction as positive relative to the fully open position 91, the angle range of -8 degrees < misalignment angle < 28 degrees (a total range of 36 degrees) becomes the non-interference zone 103. In this non-interference zone 103, the control unit 12 does not return the door 1 to the fully open position 91, but holds it in that misaligned position. Then, if the door 1 is misaligned beyond the non-interference zone 103, the control unit 12 performs a full-open return control to return the door 1 to the fully open position 91.

[0046] As described above, the electric door closer in this embodiment is equipped with a fully open continuous mode, and the fully open continuous mode can be switched ON and OFF by the changeover switch 51. Therefore, the user can arbitrarily select and set the fully open continuous mode according to the site and situation. In sites and situations where the fully open continuous mode is not necessary, by setting the fully open continuous mode to OFF, even if an open signal is mistakenly input at the fully open position 91, for example, the system will not switch to the fully open continuous mode. Therefore, it is easy to respond to incorrect input of an open signal. On the other hand, in sites where, for example, a robot passes through, by setting the fully open continuous mode to ON, the fully open state can be easily maintained. When a robot passes through, the robot outputs an open signal. The open signal is sent wirelessly to, for example, a PC, and then to the electric door closer connected to the PC. As the robot passes through, the robot continues to output an open signal, so that the electric door closer continues to hold the door 1 in the fully open position 91, allowing the robot to pass through smoothly.

[0047] Furthermore, in the fully open continuous mode, full-open return control is performed, so if a strong wind hits the door 1 and the door 1 shifts beyond the non-interference zone 103, the door 1 is automatically returned to the fully open position 91. This ensures that smooth passage is continuously maintained. In particular, the non-interference zone 103 is set to be large in the opening direction. Therefore, even if the door 1 shifts in the opening direction, it is not frequently returned to the fully open position 91, and frequent swinging of the door 1 can be suppressed. On the other hand, the non-interference zone 103 is set to be small in the closing direction. Therefore, if the door 1 shifts in the closing direction, it is quickly returned to the original fully open position 91, the passage area of ​​the opening is quickly restored and secured, and smooth passage is ensured.

[0048] Furthermore, because a non-interference zone 103 is provided, frequent swinging of the door 1 is suppressed, and since the door 1 does not swing frequently near the fully open position 91, a sense of security is provided. In addition, in the non-interference zone 103, the door 1 is held in place by the brakes at a shifted angular position, ensuring a high position-holding capability against external forces and enabling the securing of a stable passage area. [Explanation of symbols]

[0049] 1 Door 2 Door frame 2a Upper frame 2b vertical frame 3 Main unit 4 Link Mechanism 5 Power supply device 6 Arms 7 Links 8 brackets 9 Commercial power supply 10 spindle 11 Electric drive unit 12 Control Unit 13 Main Interface 20 First Code 21 AC adapters 22 Second Code 23 Relay Box 24 Third Code 25 Power plug 26 Secondary battery 27 Circuit boards 31 First external terminal 32 Second external terminal 41 Motor 42 Motor shaft 43 Torque Limiter 44 Output shaft 45 1st Gear 46 2nd gear 50 Power switch 51 Changeover switch 52 Adjustment knob 53 Indicators 90 Fully closed position 91 Fully open position 101 First deviation angle 102 Second deviation angle 103 Non-Interference Zone

Claims

1. An electric door closer that electrically opens and closes a door that rotates around a predetermined axis, an electric drive unit that drives the door to open and close; a control unit having an automatic opening / closing mode that controls the electric drive unit to open the door from a fully closed position to a fully open position, hold the brake at the fully open position for a predetermined stopping time, and then close the door to the fully closed position, and a full open continuation mode that continues to hold the brake at the fully open position beyond the stopping time; A toggle switch to turn the full-power continuous mode ON and OFF, It is equipped with an external terminal to which an open door signal is input, The fully open continuous mode includes a fully open return control that returns the door to the fully open position when the door is deviated by a predetermined angle or more from the fully open position. The control unit If the toggle switch is OFF, the automatic opening / closing mode will be executed. If the changeover switch is ON and an open door signal is input when the stop time has elapsed in the fully open position, the mode switches from the automatic opening / closing mode to the continuous fully open mode, When the changeover switch is ON and the door open signal is not input when the stop time has elapsed in the fully open position, the electric door closer does not transition to the continuous fully open mode but executes the automatic opening / closing mode.

2. 2. The electric door closer according to claim 1, wherein in the continuous full open mode, when the door is deviated from the fully open position by less than a predetermined deviation angle, the control unit brakes and holds the door in that position without performing full open return control.

3. 3. The electric door closer according to claim 1, wherein the control unit returns the door to the fully open position when, in the continuous full open mode, the door deviates in the opening direction from the fully open position by a first deviation angle or more, and when the door deviates in the closing direction from the fully open position by a second deviation angle or more that is smaller than the first deviation angle.

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