Automatic door devices and automatic door systems

Abstract

The present invention provides an automatic door device and automatic door system with a simple configuration that allows a person who wishes to pass through to manually open the door when it is automatically closed. [Solution] The automatic door device 10 includes a door drive unit 20 that drives the door 2, a door control unit 11 that controls the door drive unit 20, and an activation sensor 12 that the door control unit 11 uses to detect people around the door 2. When the door control unit 11 is performing full-close maintenance control to keep the door 2 in a fully closed state and the activation sensor 12 detects a person, it switches from full-close maintenance control to emergency passage control, which allows a person to move the door 2 in the opening direction with less work than is required to move the door 2 in the opening direction in full-close maintenance control.

Description

Technical Field

[0001] The present invention relates to an automatic door device and an automatic door system.

Background Art

[0002] In the automatic door device described in Patent Document 1, in case of a power failure due to a fire or the like, or when an emergency signal such as a fire alarm or a smoke detector is input, an emergency device is provided to mechanically open or close the automatic door for evacuation or fire prevention. The emergency device is provided with a reverse winding wheel around which a winding plate spring is wound on a driven wheel such as a chain that drives the automatic door. When the power is cut off in an emergency such as a fire, the solenoid is excited to mechanically connect the driven wheel and the reverse winding wheel, and the automatic door is opened or closed emergently by the restoring force of the winding spring.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the automatic door device described in Patent Document 1, when configured to mechanically open and close the door by a plate spring in an emergency, it can only be driven in either one of the predetermined opening direction or closing direction of the door. In addition, since it is necessary to provide a normal driving device for electrically opening and closing the door during normal times and an emergency driving device for mechanically opening and closing the door during emergencies such as a fire, the structure becomes complicated. Therefore, it is required that a person can manually open a closed door with a simple configuration.

Means for Solving the Problems

[0005] An automatic door device that solves the above problems comprises a drive unit for driving a door, a control unit for controlling the drive unit, and a detection unit for detecting a person around the door, wherein when the detection unit detects a person while the control unit is performing a fully closed maintenance control to maintain the door in a fully closed state, the control unit switches from the fully closed maintenance control to an emergency passage control that allows a person to move the door in the opening direction with less work than the amount of work required for a person to move the door in the opening direction in the fully closed maintenance control.

[0006] According to the above configuration, if the detection unit detects a person while the door is being kept in a fully closed position using the fully closed maintenance control, the system switches from fully closed maintenance control to emergency passage control, which allows a person to open the door. Therefore, when a person is near a door that is under fully closed maintenance control, the system switches to emergency passage control, allowing the person who wishes to pass through to move the door in the opening direction and pass through. Thus, with a simple configuration, a person who wishes to pass through a door under fully closed maintenance control can manually open the door, and in emergency passage control, the door will not open unless a person moves it in the opening direction, thus ensuring airtightness and smoke-proofing.

[0007] With respect to the above-described automatic door device, it is preferable that the fully closed maintenance control is a control that continuously drives the door in the closing direction by the drive unit, and the emergency passage control is one of the following: a control that intermittently drives the door in the closing direction by the drive unit, a control that stops the drive unit, and a control that drives the door in the opening direction within a range in which the door does not move in the opening direction by the drive unit.

[0008] With respect to the above-described automatic door device, the fully closed maintenance control is preferably a control that intermittently drives the door in the closing direction by the drive unit, and the emergency passage control is preferably one of the following: a control that intermittently drives the door in the closing direction by the drive unit at intervals longer than the fully closed maintenance control, a control that stops the drive unit, and a control that drives the door in the opening direction within a range in which the door does not move in the opening direction by the drive unit.

[0009] With respect to the above-mentioned automatic door device, when an object detected by the detection unit moves toward the door, it is preferable that the control unit determines that the detection unit has detected a person around the door and switches from the fully closed maintenance control to the emergency passage control.

[0010] With respect to the above-mentioned automatic door device, it is preferable that the control unit switches to the emergency passage control if the detection unit malfunctions while the fully closed door maintenance control is being performed. The above-described automatic door device is equipped with a movement detection unit that detects the movement of the door in the opening direction, and it is preferable that the control unit, when performing the emergency passage control, switches to the fully closed maintenance control if the movement detection unit does not detect the movement of the door and the detection unit does not detect any people around the door.

[0011] The above-mentioned automatic door device is preferably equipped with a movement detection unit that detects the movement of the door in the opening direction, and when the movement detection unit detects that the door has moved a predetermined distance or more in the opening direction while the emergency passage control is being performed, the control unit preferably switches to the fully closed maintenance control.

[0012] In the above-described automatic door device, it is preferable that the detection unit is an activation sensor that causes the control unit to drive the door open when it detects a person around the door. In the above-described automatic door device, the detection unit is a touch switch that detects when a person touches or approaches the door, and it is preferable that the control unit, upon detection by the touch switch, switches from the fully closed maintenance control to the emergency passage control.

[0013] An automatic door system that solves the above problems comprises a control unit that controls a drive unit that drives a door, and an acquisition unit that acquires information indicating that there are people around the door. When the control unit is performing a fully closed maintenance control that keeps the door in a fully closed state and acquires information from the acquisition unit indicating that there are people around the door, it switches from the fully closed maintenance control to an emergency passage control that allows a person to drive the door in the closing direction with less work than the amount of work required for a person to move the door in the opening direction in the fully closed maintenance control.

[0014] According to the above configuration, when the acquisition unit acquires information while the door is being maintained in a fully closed state by full-close maintenance control, it switches from full-close maintenance control to emergency passage control, which allows a person to open the door. Therefore, when there is a person around a door that is under full-close maintenance control, it switches to emergency passage control, allowing the person who wants to pass through to move the door in the opening direction and pass through. Thus, with a simple configuration, a door that is under full-close maintenance control can be switched to emergency passage control, allowing a person who wants to pass through to manually open the door, and in emergency passage control, the door will not open unless a person moves the door in the opening direction, thus ensuring airtightness and smoke-proofing. [Effects of the Invention]

[0015] According to the present invention, with a simple configuration, a person who wishes to pass through a door that is under full-close maintenance control can manually open the door, and in the event of emergency passage control, the door will not open unless a person moves the door in the opening direction, thus ensuring airtightness and smoke-proofing. [Brief explanation of the drawing]

[0016] [Figure 1] This is a block diagram showing the electrical configuration of one embodiment of an automatic door device. [Figure 2] This is a front view showing the configuration of the automatic door device in the fully closed position, according to the same embodiment. [Figure 3] This is a front view showing the configuration of the automatic door device in the fully open position, according to the same embodiment. [Figure 4]It is a flowchart showing the operation of the automatic door device of the same embodiment. [Figure 5] It is a diagram showing the driven pulley and the drive wire of the automatic door device of the same embodiment. [Figure 6] It is a diagram showing an engagement member fixed to the drive wire of the automatic door device of the same embodiment. [Figure 7] It is a diagram showing an engagement member fixed to the drive wire of the automatic door device of the same embodiment. [Figure 8] It is a diagram showing a modification example of the driven pulley and the drive wire of the automatic door device. [Figure 9] It is a diagram showing a modification example of the engagement member fixed to the drive wire of the automatic door device. [Figure 10] It is a diagram showing a modification example of the engagement member fixed to the drive wire of the automatic door device.

Mode for Carrying Out the Invention

[0017] (This Embodiment) Hereinafter, an embodiment of the automatic door device will be described with reference to FIGS. 1 to 7. The automatic door device functions as a fire door. The automatic door device is a single-opening door.

[0018] (Automatic Door Device 10) As shown in Figure 1, the automatic door device 10 comprises a door drive unit 20, a door control unit 11, and a start sensor 12. The door drive unit 20 drives the door 2. The door drive unit 20 is an electric motor. The door control unit 11 controls the door drive unit 20. The start sensor 12 detects people around the door 2. When the start sensor 12 detects people around the door 2, it causes the door control unit 11 to drive the door 2 open. When an object detected by the start sensor 12 moves towards the door 2, the door control unit 11 determines that the start sensor 12 has detected people around the door 2. The start sensor 12 corresponds to a detection unit. The door control unit 11 causes the door drive unit 20 to drive the door 2 open when the start sensor 12 detects people around the door 2, and causes the door drive unit 20 to drive the door 2 closed when the start sensor 12 no longer detects people around the door 2. The automatic door device 10 receives a closing signal from the fire prevention control panel 7 to close the door 2 in the event of an emergency such as a fire. The fire prevention control panel 7 is installed in the building. The door control unit 11, the activation sensor 12, and the fire prevention control panel 7 are electrically connected by a communication line 15. When the need for the door 2 to remain closed is gone, the fire prevention control panel 7 outputs a release signal to the automatic door device 10.

[0019] The door control unit 11 may be configured as one or more processors that execute various processes according to a computer program (software). The door control unit 11 may also be configured as a circuit including one or more dedicated hardware circuits, such as application-specific integrated circuits (ASICs), or a combination thereof, that execute at least some of the various processes. The processor includes a CPU and memory such as RAM and ROM. The memory stores program code or instructions configured to cause the CPU to execute processes. Memory, or computer-readable media, includes any available media that can be accessed by a general-purpose or dedicated computer. Programs stored in computer-readable media include control programs.

[0020] The automatic door device 10 includes a movement detection unit 25. The movement detection unit 25 detects the movement of the door 2 in the opening direction. The movement detection unit 25 is, for example, an encoder that detects the rotation of the electric motor of the door drive unit 20. The movement detection unit 25 may also be a sensor or camera that directly detects the movement of the door 2.

[0021] As shown in Figures 2 and 3, the automatic door device 10 is installed in an opening 1 of a building. A first vertical frame 5 extending vertically is provided at the left end of the opening 1 in the diagram. A second vertical frame 6 extending vertically is provided at the right end of the opening 1 in the diagram. The automatic door device 10 comprises a door 2, a fixed wall 3, and a transom 4. The fixed wall 3 is a wall fixed to the opening 1. The door 2 is provided to be movable parallel to the fixed wall 3 and opens and closes the opening 1. Figure 2 shows the fully closed state with the leading edge of the door 2 in contact with the first vertical frame 5. Figure 3 shows the fully open state with the trailing edge of the door 2 in contact with the second vertical frame 6. The transom 4 is provided above the door 2 and the fixed wall 3. The transom 4 houses the door drive unit 20 and the door control unit 11.

[0022] A first door hanger 27 and a second door hanger 28 are fixed to the upper part of door 2. Inside the transom 4, there is a rail 26, a drive pulley 21, and a driven pulley 22. The first door hanger 27 is equipped with two first suspension wheels 27A. The second door hanger 28 is equipped with two second suspension wheels 28A. The rail 26 extends in the width direction of the opening 1. The first suspension wheels 27A and the second suspension wheels 28A travel along the rail 26.

[0023] The door drive unit 20 and drive pulley 21 are located towards the right in the diagram of the transom 4. The driven pulley 22 is located towards the left in the diagram of the transom 4. The door control unit 11 is located in the center of the transom 4. The drive pulley 21 is mounted on the drive shaft of the electric motor of the door drive unit 20 and rotates together with the rotation of the drive shaft of the electric motor.

[0024] An annular member 23 is wrapped around the drive pulley 21 and the driven pulley 22. The annular member 23 consists of a drive chain 23A and a drive wire 23B. The portion of the annular member 23 that contacts the driven pulley 22 is the drive wire 23B. The portion of the annular member 23 that does not contact the driven pulley 22 is the drive chain 23A. Both the drive chain 23A and the drive wire 23B are made of metal and are highly resistant to flames and high temperatures. The length of the annular member 23 can be adjusted by the drive wire 23B when the automatic door device 10 is installed. The first door hanger 27 and the annular member 23 are connected by a connecting portion 29. Therefore, the first door hanger 27 moves as the annular member 23 moves.

[0025] The driven pulley 22 is equipped with an electromagnetic brake (not shown). The automatic door device 10 locks the door 2 by stopping the rotation of the driven pulley 22 using the electromagnetic brake. The drive wire 23B is configured to mesh with the driven pulley 22 because there is a risk of it slipping on the outer surface of the driven pulley 22.

[0026] As shown in Figure 5, recesses 22A are provided on the outer circumferential surface of the driven pulley 22 at intervals in the circumferential direction. The recesses 22A are circular through holes. As shown in Figures 6 and 7, multiple spherical engaging members 30 are fixed to the drive wire 23B. The engaging members 30 are made of metal. The spacing between the engaging members 30 is the same as the spacing between the recesses 22A of the driven pulley 22. The engaging members 30 have through holes 30A into which the drive wire 23B is inserted. The drive wire 23B is inserted into the through holes 30A of the engaging members 30, and the engaging members 30 are fixed to the drive wire 23B by grub screws 31. The engaging members 30 may also be fixed to the drive wire 23B by crimping or adhesive. The engaging members 30 may also be made of flame-retardant resin material. When the rotation of the driven pulley 22 is stopped by the electromagnetic brake, the engaging members 30 fit into the recesses 22A, preventing slippage of the drive wire 23B, and thus the door 2 is locked.

[0027] When the door control unit 11 receives a closing signal from the disaster prevention control panel 7, it performs a fully closed maintenance control to keep the door 2 in a fully closed state. If the activation sensor 12 detects something while the door control unit 11 is performing the fully closed maintenance control, it switches from the fully closed maintenance control state to an emergency passage control state, which allows a person to move the door 2 in the opening direction with less work than is required in the fully closed maintenance control state. The fully closed maintenance control is a control that continuously drives the door 2 in the closing direction using the door drive unit 20. That is, the door 2 is pressed against the first vertical frame 5. The emergency passage control is a control that intermittently drives the door 2 in the closing direction using the door drive unit 20. That is, intermittent driving requires less work to move the door 2 than continuous driving of the door drive unit 20. Therefore, since door 2 is not always pressed against the first vertical frame 5, a person who wants to pass through door 2 can insert their hand between door 2 and the first vertical frame 5 and move door 2 in the opening direction, making it possible to open door 2 manually.

[0028] The door control unit 11 returns to fully closed maintenance control when emergency passage control is being performed and the movement detection unit 25 has not detected any movement of the door 2, and the activation sensor 12 has not detected any people around the door 2. In other words, the door control unit 11 returns to fully closed maintenance control on the condition that there are no people around the door 2.

[0029] The door control unit 11 returns to fully closed maintenance control when the movement detection unit 25 detects that the door 2 has moved a predetermined distance or more in the opening direction while emergency passage control is being performed. In other words, the door control unit 11 returns to fully closed maintenance control when a person who wants to pass through the door 2 opens the door 2 and passes through.

[0030] When the door control unit 11 is performing full-close maintenance control and receives a release signal from the disaster prevention control panel 7, it performs normal control. Normal control involves opening the door 2 when the activation sensor 12 detects something, and closing the door 2 when the activation sensor 12 no longer detects anything.

[0031] (Operation of this embodiment) Next, the processing procedure of the automatic door device 10 will be explained with reference to Figure 4. First, the door control unit 11 determines whether or not a closing signal has been input (step S1). That is, the door control unit 11 determines whether or not it is necessary to fully close the door 2 based on the presence or absence of a closing signal input from the disaster prevention control panel 7. If no closing signal has been input (step S1: NO), the door control unit 11 terminates the process.

[0032] On the other hand, if a closing signal is input to the door control unit 11 (step S1: YES), the door control unit 11 performs a fully closed maintenance control (step S2). That is, the door control unit 11 continuously drives the door drive unit 20 in the closing direction. As a result, the door 2 is pressed against the first vertical frame 5 and the fully closed state is maintained.

[0033] Next, the door control unit 11 determines whether or not a release signal has been input (step S3). That is, the door control unit 11 determines whether or not it is no longer necessary to fully close the door 2 based on the presence or absence of a release signal. If a release signal has been input (step S3: YES), the door control unit 11 switches from fully closed maintenance control to normal control (step S8) and terminates the process.

[0034] On the other hand, in full-close maintenance control, the door control unit 11 determines whether or not it has detected a person around the door 2 (step S4). That is, the door control unit 11 obtains whether or not the activation sensor 12 has detected a person around the door 2. If the activation sensor 12 has not detected a person around the door 2 (step S4: NO), the door control unit 11 proceeds to step S3 and continues the full-close maintenance control.

[0035] On the other hand, if the activation sensor 12 detects a person around the door 2 (step S4: YES), the door control unit 11 switches from fully closed maintenance control to emergency passage control (step S5). That is, the door control unit 11 puts the door drive unit 20 into a free state. As a result, the door 2 can be opened manually. Also, in emergency passage control, if the activation sensor 12 becomes unable to detect anything due to flames or smoke, the door control unit 11 switches from emergency passage control to fully closed maintenance control.

[0036] Next, the door control unit 11 determines whether the door 2 has moved a predetermined distance in the opening direction (step S6). That is, the door control unit 11 obtains whether the movement detection unit 25 has detected that the door 2 has moved a predetermined distance in the opening direction. If the movement detection unit 25 has detected that the door 2 has moved more than the predetermined distance in the opening direction (step S6: YES), the door control unit 11 switches from emergency passage control to fully closed maintenance control (step S2). Note that the door control unit 11 switches from emergency passage control to fully closed maintenance control only after the door 2 has moved more than the predetermined distance in the opening direction and has stopped moving.

[0037] On the other hand, if the movement detection unit 25 detects that the door 2 has moved less than a predetermined distance in the opening direction, or if it has not detected any movement (step S6: NO), the door control unit 11 determines again whether or not it has detected a person around the door 2 (step S7). That is, the door control unit 11 obtains whether or not the activation sensor 12 has detected an object moving towards the door 2 around the door 2. Then, if the activation sensor 12 has not detected a person around the door 2 (step S7: NO), the door control unit 11 switches from emergency passage control to fully closed maintenance control (step S2).

[0038] On the other hand, if the activation sensor 12 detects a person around the door 2 (step S7: YES), the door control unit 11 proceeds to step S6 and continues emergency passage control until the door 2 moves beyond a predetermined distance or until there are no people around the door 2.

[0039] (Effects of this embodiment) Next, the effects of this embodiment will be described. (1) While the fully closed maintenance control is being performed to keep door 2 in a fully closed state, if the activation sensor 12 detects something, the system switches to emergency passage control, which allows door 2 to be opened. Therefore, with a simple configuration, a person who wants to pass through door 2 can open door 2 manually, and airtightness and smoke-proofing can be ensured when the automatic door closes.

[0040] (2) The system switches to emergency passage control, which allows a person to move door 2 in the opening direction with less work than is required for a person to move door 2 in the opening direction during full-close maintenance control. Therefore, a person who wishes to pass through door 2 while full-close maintenance control is in place can manually open door 2.

[0041] (3) When the object detected by the activation sensor 12 moves towards door 2, the activation sensor 12 determines that it has detected a person who wants to pass through door 2. Therefore, emergency passage control can be activated only when a person approaches door 2.

[0042] (4) If the activation sensor 12 malfunctions and is unable to detect people around door 2, the system switches to emergency passage control. Therefore, even if the activation sensor 12 cannot detect people, people who wish to pass through door 2 can manually open door 2 and pass through.

[0043] (5) If the movement detection unit 25 does not detect movement of the door 2 in the opening direction and the activation sensor 12 does not detect a person who wants to pass through the door 2, the system switches from emergency passage control to fully closed maintenance control. Therefore, when a person detected by the activation sensor 12 moves away from the door 2 without passing through it, the door 2 is closed to ensure airtightness and smoke shielding.

[0044] (6) When the movement detection unit 25 detects that the door 2 has moved a predetermined distance or more in the opening direction, it switches from emergency passage control to fully closed maintenance control. Therefore, when the door 2 opens due to the door 2 moving a predetermined distance in the opening direction and a person passes through the door 2, the door 2 is quickly closed to ensure airtightness and smoke shielding.

[0045] (7) When the activation sensor 12, which causes the door control unit 11 to drive the door 2 to open, detects a person, the system switches from fully closed maintenance control to emergency passage control. Therefore, the activation sensor 12 used for normal opening and closing of the door 2 can detect the presence of a person during fully closed maintenance control, eliminating the need to provide a new detection means.

[0046] (Other embodiments) The above embodiment can be implemented with the following modifications. The above embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0047] In the above embodiment, emergency passage control was performed by intermittently driving the door 2 in the closing direction using the door drive unit 20. However, emergency passage control may also be performed by stopping the door drive unit 20. Alternatively, emergency passage control may be performed by driving the door 20 in the opening direction within a range where the door 2 does not move in the opening direction. That is, the door drive unit 20 applies a driving force smaller than the force required to move the door 2 against the static friction acting on the door 2.

[0048] In the above embodiment, the door drive unit 20 was used to continuously drive the door 2 in the closing direction as a fully closed maintenance control. However, the door drive unit 20 may also be used to intermittently drive the door 2 in the closing direction as a fully closed maintenance control. In this case, the door drive unit 20 may be used to completely drive the door 2 in the closing direction with a longer interval between standby states than the fully closed maintenance control as an emergency passage control. Alternatively, the door drive unit 20 may be stopped as an emergency passage control. Alternatively, the door drive unit 20 may be used to drive the door 2 in the opening direction within a range where the door 2 does not move in the opening direction as an emergency passage control. That is, the door drive unit 20 applies a driving force smaller than the force required to move the door 2 against the static friction acting on the door 2.

[0049] In the above embodiment, if the movement detection unit 25 does not detect movement of the door 2 in the opening direction and the activation sensor 12 does not detect any people around the door 2, the system transitions from emergency passage control to fully closed maintenance control. However, the system may return to fully closed maintenance control after a predetermined time has elapsed since transitioning to emergency passage control.

[0050] In the above embodiment, when the movement detection unit detects that the door has moved a predetermined distance or more in the opening direction, the control switches from emergency passage control to fully closed maintenance control. However, the control may return to fully closed maintenance control after a predetermined time has elapsed since switching to emergency passage control.

[0051] In the above embodiment, the activation sensor 12 determined that it had detected a person around door 2 when the object it detected moved towards door 2. However, it is also possible to determine that there is a person around door 2 if it is detected around door 2 regardless of the object's movement. Furthermore, the activation sensor 12 may determine that it has detected a person around door 2 when it detects an object in a specific area around door 2. By enabling object detection only in a portion of the door surface of door 2 within the detection area of ​​the activation sensor 12, and determining that a person around door 2 has been detected when an object is detected in that detection area, emergency passage control can be activated only when a person is reliably approaching door 2.

[0052] In the above embodiment, a touch sensor 13 may be provided on the door 2, and when the touch sensor 13 detects that a person has touched or approached the door 2, it may be determined that there is a person around the door 2. The touch sensor 13 corresponds to the detection unit. With this configuration, since the detection unit is a touch switch, it is possible to detect when a person who wants to pass through the door 2 intentionally touches or approaches the door 2, and to switch from fully closed maintenance control to emergency passage control.

[0053] In the above embodiment, an operating lever 14 for opening and closing the door 2 may be provided, and it may be determined that there is a person around the door 2 when the operating lever 14 is operated. The operating lever 14 corresponds to the detection unit. The operating lever 14 may be equipped with a sensor that detects contact with a handle pre-installed on the vertical frame of the door 2, and it may be determined that a person has passed through the door 2 when the sensor is in a detection state.

[0054] In the above embodiment, it was determined that there were people around the door 2 when the detection unit, consisting of the activation sensor 12, touch sensor 13, and operating lever 14, detected something. However, information that there are people around the door 2 may be obtained from outside the automatic door device 10. The automatic door system includes an acquisition unit that acquires information that there are people around the door 2 from surveillance cameras, sensors, building security systems, etc., installed in the building. When the acquisition unit acquires information that there are people around the door 2, the door control unit switches from emergency closing control to emergency passage control. With such a configuration, the door 2 can be opened manually only when a person who wants to pass through the door 2 is passing through, and airtightness and smoke-proofing can be ensured when the automatic door is closed.

[0055] In the above embodiment, a circular recess 22A is provided in the driven pulley 22, and a spherical engaging member 30 is fixed to the drive wire 23B. However, as shown in Figures 8 to 10, rectangular recesses 22B are provided on the outer circumferential surface of the driven pulley 22 at intervals in the circumferential direction. Multiple cylindrical engaging members 40 are fixed to the drive wire 23B. The engaging members 40 are made of metal. The spacing between the engaging members 40 is the same as the spacing between the recesses 22B of the driven pulley 22. The engaging members 40 have through holes 40A into which the drive wire 23B is inserted. The engaging member 40 comprises a first member 41 and a second member 42, and is crimped with the drive wire 23B in between. The engaging member 40 may be fixed to the drive wire 23B with an adhesive. The engaging member 40 may be made of a flame-retardant resin material. When the rotation of the driven pulley 22 is stopped by the electromagnetic brake, the engaging member 40 fits into the recess 22B, preventing slippage of the drive wire 23B, and thus the door 2 is locked.

[0056] In the above embodiment, recesses 22A and 22B are provided on the outer circumferential surface of the driven pulley 22. However, the grooves on the outer circumferential surface of the driven pulley 22 that engage with the toothed timing belt may be used as they are, and an engaging member that engages with these grooves may be fixed to the drive wire 23B.

[0057] In the above embodiment, an electromagnetic brake is provided on the driven pulley 22. However, an electromagnetic brake may be omitted from the driven pulley 22, and a different locking mechanism may be provided instead. In this case, it is not necessary to provide the engaging members 30 and 40 on the drive wire 23B.

[0058] In the above embodiment, a structure composed of multiple objects may be integrated, or conversely, a structure composed of a single object may be divided into multiple objects. Whether or not the objects are integrated, the structure should be configured in a way that achieves the objective of the invention.

[0059] In the above embodiment, if multiple functions are provided in a distributed manner, some or all of those functions may be consolidated and provided together. Conversely, if multiple functions are consolidated and provided together, some or all of those functions may be distributed and provided together. Regardless of whether the functions are consolidated or distributed, it is sufficient that the objective of the invention can be achieved. [Explanation of Symbols]

[0060] 1…Opening 2… Door 3…Fixed wall 4… No eyes 5…First vertical frame 6…Second vertical frame 7… Disaster prevention control panel 10... Automatic door system 11…Door control unit 12…Startup sensor 13…Touch sensor 14…Operating lever 15…Communication lines 20... Door drive unit 21… Drive pulley 22... Driven pulley 22A…recess 22B…recess 23…Annular member 23A… Drive chain 23B... Drive wire 25...Movement detection unit 26... Rails 27...First door hanger 27A…1st hanging wheel 28... Second door hanger 28A…Second suspension wheel 29...Connection part 30…Engaging member 30A...Through hole 31...Grub screw 40…Engaging member 40A...Through hole 41...First component 42...Second component

Claims

1. The drive unit that drives the door, A control unit that controls the drive unit, The control unit includes a detection unit that detects people around the door, When the control unit is performing fully closed maintenance control to keep the door in a fully closed state and the detection unit detects this, it switches from the fully closed maintenance control to emergency passage control, which allows a person to move the door in the opening direction with less work than is required to move the door in the opening direction in the fully closed maintenance control. Automatic door system.

2. The aforementioned fully closed maintenance control is a control that causes the drive unit to continuously drive the door in the closing direction, The emergency passage control is one of the following: a control that intermittently drives the door in the closing direction by the drive unit; a control that stops the drive unit; or a control that drives the door in the opening direction within a range in which the door does not move in the opening direction by the drive unit. The automatic door device according to claim 1.

3. The aforementioned fully closed maintenance control is a control that intermittently drives the door in the closing direction by the drive unit, The emergency passage control is one of the following: a control that intermittently drives the door in the closing direction by the drive unit at intervals longer than the fully closed maintenance control; a control that stops the drive unit; and a control that drives the door in the opening direction within a range in which the door does not move in the opening direction by the drive unit. The automatic door device according to claim 1.

4. When the object detected by the detection unit moves towards the door, the control unit determines that the detection unit has detected a person around the door and switches from the fully closed maintenance control to the emergency passage control. The automatic door device according to claim 1.

5. If the control unit is unable to detect the door while performing the fully closed door maintenance control, it will switch to the emergency passage control. The automatic door device according to claim 1.

6. The door is equipped with a movement detection unit that detects movement in the opening direction, The control unit, when performing the emergency passage control, will switch to the fully closed maintenance control if the movement detection unit does not detect movement of the door and the detection unit does not detect any people around the door. The automatic door device according to any one of claims 1 to 5.

7. The door is equipped with a movement detection unit that detects movement in the opening direction, When the control unit is performing the emergency passage control, if the movement detection unit detects that the door has moved more than a predetermined distance in the opening direction, it switches to the fully closed maintenance control. The automatic door device according to any one of claims 1 to 5.

8. The detection unit is an activation sensor that, when it detects a person around the door, causes the control unit to drive the door open. The automatic door device according to any one of claims 1 to 5.

9. The detection unit is a touch switch provided on the door that detects when a person touches or approaches it, When the touch switch is detected, the control unit switches from the fully closed maintenance control to the emergency passage control. The automatic door device according to claim 1.

10. A control unit that controls the drive unit that drives the door, The system includes an acquisition unit that acquires information indicating that there are people around the door, When the control unit is performing a fully closed maintenance control to keep the door in a fully closed state and acquires information from the acquisition unit indicating that there is a person around the door, it switches from the fully closed maintenance control to an emergency passage control in which a person can drive the door in the closing direction with less work than the amount of work required to move the door in the opening direction in the fully closed maintenance control. Automatic door system.

Images