Electric shutter device

Abstract

To provide an electric shutter device capable of accurately opening / closing a shutter curtain electrically even if the shutter curtain is manually operated during energization.SOLUTION: An electric shutter device can be switched between an electric mode in which an opening / closing operation of a shutter curtain is performed electrically and a manual mode in which the shutter curtain can be opened / closed manually during energization. The electric shutter device includes a control unit for detecting an abnormality in the load acting on the shutter curtain during the opening / closing operation in the electric mode. When the abnormality is detected during the operation of the shutter curtain to an upper limit position or a lower limit position by an operation shorter than a second distance shorter than a specified first distance, the control unit causes the shutter curtain to operate through the first distance in the direction opposite to the immediately preceding operation.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to an electric shutter device. [Background technology]

[0002] There is known an electric shutter device that uses a motor to open and close a shutter curtain. Patent Document 1 discloses an electric shutter device that electrically opens and closes the shutter curtain while always recognizing the current position of the shutter curtain by storing the current position in a volatile memory as needed.

[0003] Some electric shutter devices can be switched between a manual mode, in which the shutter curtain can be opened and closed manually in an emergency such as a power outage, and an electric mode, in which the shutter curtain is opened and closed electrically. In the manual mode, the power supply to the electric shutter device is turned off, so the current position stored in the memory is lost. If the manual mode is switched to the electric mode when the current position is lost, it is necessary to perform a power outage recovery operation by reconfiguring the fully closed and fully open positions with the remote control device to recognize the current position. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-160622 A Summary of the Invention [Problem to be solved by the invention]

[0005] In an electric shutter device, there is a demand from users to manually operate the electric shutter without turning off the power supply. In manual mode, it is not possible to recognize the current position of the shutter curtain. When opening and closing the shutter curtain in manual mode and then switching to electric mode to open and close the shutter curtain, an error occurs between the actual current position of the shutter curtain and the current position of the shutter curtain recognized by the electric shutter device. When the current position recognized by the electric shutter device differs from the actual current position, it is not possible to accurately open and close the shutter curtain.

[0006] It is possible to forcibly turn off the power to the electric shutter device and perform the power recovery operation, but this places a burden on the user.

[0007] The present disclosure has been made in consideration of the above points, and aims to provide an electric shutter device that can accurately open and close a shutter curtain electrically, even if the shutter curtain is manually operated while power is applied, without having to turn off the power and perform a power outage recovery operation. [Means for solving the problem]

[0008] A first aspect of the present disclosure is an electric shutter device that is switchable between an electric mode in which the opening and closing operation of the shutter curtain is performed electrically and a manual mode in which the shutter curtain can be opened and closed manually while power is applied, and is equipped with a control unit that performs abnormality detection to detect an abnormality in the load acting on the shutter curtain during the opening and closing operation in the electric mode, and when the control unit detects the abnormality during operation of the shutter curtain to an upper limit position or a lower limit position, during operation less than a second distance that is shorter than a predetermined first distance, it operates the shutter curtain at the first distance in the opposite direction to the previous operation. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating an example of a schematic configuration of a shutter system according to an embodiment of the present invention. [Diagram 2] 1 is a schematic configuration diagram of a shutter control device according to an embodiment of the present invention. [Diagram 3] 4 is a functional block diagram of a control unit that executes a return process for the shutter control device. FIG. [Figure 4] FIG. 11 is a diagram showing an operation flow according to the first embodiment of a return process. [Diagram 5] FIG. 11 is a diagram showing an operation flow according to the first embodiment of a return process. [Figure 6] FIG. 11 is a diagram showing a flow of operations according to a second embodiment of a return process. [Figure 7] FIG. 13 is a diagram showing an operation flow according to a third embodiment of a return process. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the electric shutter device of the present disclosure will be described with reference to Figures 1 to 5. The following embodiment shows one aspect of the present disclosure, does not limit the disclosure, and can be modified as desired within the scope of the technical idea of ​​the present disclosure. In addition, in the following drawings, the scale of each structure is different from the actual structure in order to make each configuration easier to understand.

[0011] As shown in FIG. 1, the shutter system 1 includes an electric shutter device 2 and an operation device 3.

[0012] The electric shutter device 2 is an electric shutter device that opens or closes an opening 2A such as a window or door of a building. The electric shutter device 2 includes a shutter curtain 4. The electric shutter device 2 can open or close the opening 2A by opening or closing the shutter curtain 4 based on an operation signal from an operation device 3.

[0013] The electric shutter device 2 has a configuration that allows the shutter curtain 4 to be opened and closed manually while electricity is being supplied. The electric shutter device 2 has an electric mode in which the opening and closing operation of the shutter curtain 4 is performed electrically, and a manual mode in which the shutter curtain 4 can be opened and closed manually while electricity is being supplied to the electric shutter device 2. The electric shutter device 2 has a configuration that allows switching between the electric mode and the manual mode.

[0014] The operation device 3 is connected by wire or wirelessly to the electric shutter device 2 to be operated, and is capable of mutual communication with the electric shutter device 2. The operation device 3 can be operated by a user or an operator. The operation device 3 is, for example, a remote control device, which has a means for inputting an operation signal to the electric shutter device 2.

[0015] When a user presses any of the switches of the operation device 3, the operation device 3 outputs to the electric shutter device 2 an operation signal that is a signal corresponding to the switch.

[0016] For example, the operating device 3 has an open switch SWo, a close switch SWc, and a stop switch SWt. When the open switch SWo is operated, the operating device 3 transmits a first operation signal to the electric shutter device 2 instructing the opening operation of the shutter curtain 4. When the close switch SWc is operated, the operating device 3 transmits a second operation signal to the electric shutter device 2 instructing the closing operation of the shutter curtain 4. When the stop switch SWt is operated, the operating device 3 transmits a stop signal to the electric shutter device 2 instructing the stopping of the opening operation or closing operation of the shutter curtain 4.

[0017] When a predetermined operation is performed by a user, the operation device 3 transmits a setting signal to the electric shutter device 2. For example, the predetermined operation is an operation other than a short press of one of the open switch SWo, close switch SWc, and stop switch SWt. The predetermined operation is a simultaneous press of two or more switches of the open switch SWo, close switch SWc, and stop switch SWt, or a long press of one or more switches.

[0018] The predetermined operation is not limited to pressing two or more of the open switch SWo, close switch SWc, and stop switch SWt simultaneously, or pressing and holding one or more of the switches. For example, the operation device 3 may be provided with an initial setting button. The predetermined operation may be pressing the initial setting button. For example, the initial setting button may be provided on the front or rear of the operation device 3. When the initial setting button is provided on the rear of the operation device 3, for example, the initial setting button is covered by a rear cover and becomes operable by removing the rear cover. The initial setting button is provided in a position that is exposed when the rear cover is removed.

[0019] The initial setting button may be provided in a battery box that houses a battery. When the initial setting button is provided in the battery box, the initial setting button is configured to be operable by a user by removing a battery cover that is configured to be attachable to the main body case of the operating device 3 so as to cover the battery box from the rear side of the operating device 3. The initial setting button is provided in a position that is exposed when the battery cover is removed.

[0020] The operation device 3 may be a mobile information terminal such as a smartphone or a tablet terminal. When the operation device 3 is a mobile information terminal, the predetermined operation may be, for example, a command operation for initial setting in an application of the mobile information terminal, such as a smartphone application.

[0021] An example of a schematic configuration of an electric shutter device 2 according to this embodiment will be described below. As shown in Fig. 1, the electric shutter device 2 includes a shutter curtain 4, guide rails 5a and 5b, and a shutter box 6.

[0022] The shutter curtain 4 has a plurality of long slats 4a connected in the vertical direction and a baseboard portion 4b provided at the bottom end.

[0023] The baseboard portion 4b is a long member having a rectangular cross section connected to the lowest slat 4a. The baseboard portion 4b is formed to protrude so as to come into contact with the slat or the shutter box 6 (not shown) when the shutter curtain 4 is in the fully open state, which is the upper limit position. The baseboard portion 4b comes into contact with the slat or the shutter box 6 when the shutter curtain 4 is in the fully open state, or comes into contact with a receiving portion provided on the electric shutter device 2. The baseboard portion 4b comes into contact with the lower frame of the frame of the electric shutter device 2 or the floor surface when the shutter curtain 4 is in the fully closed state, which is the lower limit position. The slat is a parting member of the opening of the electric shutter device 2 formed by the rise of the shutter curtain 4, and may be provided at the bottom of the shutter box 6.

[0024] The guide rails 5a and 5b are provided as a pair at both ends in the width direction of the shutter curtain 4. The guide rails 5a and 5b are provided vertically to the bottom surface. The guide rails 5a and 5b regulate the lateral displacement of each slat 4a constituting the shutter curtain 4.

[0025] An example of a schematic configuration of the shutter box 6 will be described. The shutter box 6 is provided on the upper part of the electric shutter device 2. The shutter box 6 rewinds the shutter curtain 4 when the shutter curtain 4 is closed, and rewinds the shutter curtain 4 when the shutter curtain 4 is opened. The shutter box 6 includes a shaft 7, a motor 8, an output unit 9, a switching unit 19, and a shutter control device 10.

[0026] The shaft 7 is connected to the upper end of the shutter curtain 4 and to a motor 8. The shaft 7 is driven to rotate in forward and reverse directions by the motor 8. The shutter curtain 4 is unwound or wound in response to the rotation of the shaft 7. The shutter curtain 4 wound around the shaft 7 is accommodated in the shutter box 6.

[0027] The motor 8 is a drive source that drives the shaft 7 to rotate and open / close the shutter curtain 4. The motor 8 drives the shutter curtain 4 to open / close by, for example, a direct current. The motor 8 rotates forward, reverse, or stops rotating based on a drive signal from the shutter control device 10.

[0028] The output unit 9 has a function of outputting the driving status of the motor 8. The output unit 9 is, for example, an encoder built into the motor 8. The output unit 9 outputs a position pulse, which is a pulse signal corresponding to the rotation of the motor 8, to the shutter control device 10. For example, the output unit 9 outputs one position pulse to the shutter control device 10 every time the motor 8 rotates once. The output unit 9 is not limited to an encoder, and can be arbitrarily selected as long as it has a configuration that can grasp the amount of rotation of the winding shaft and the motor 8, such as measuring the amount of rotation angle of the motor 8.

[0029] The switching unit 19 can be operated by a user, and switches the opening / closing operation mode of the shutter curtain 4 between an electric mode and a manual mode by the user's operation. For example, the switching unit 19 includes a clutch mechanism capable of disconnecting the shaft 7 from the drive shaft of the motor 8. When a first operation is performed by the user, the switching unit 19 disconnects the shaft 7 from the drive shaft of the motor 8 to switch from the electric mode to the manual mode. When a second operation is performed by the user, the switching unit 19 connects the shaft 7 to the drive shaft of the motor 8 to switch from the manual mode to the electric mode. The switching mechanism of the switching unit 19 for switching the opening / closing operation mode is not limited to the above-mentioned clutch mechanism, and may have any configuration as long as it is capable of switching between the electric mode and the manual mode.

[0030] The switching unit 19 notifies the shutter control device 10 of a switching result indicating whether the mode has been switched to, between the electric mode and the manual mode. The shutter control device 10 can detect switching from the electric mode to the manual mode or switching from the manual mode to the electric mode based on the switching result.

[0031] 2, the shutter control device 10 includes a communication unit 11, a drive unit 12, and a control unit 13. The communication unit 11 transmits and receives information by communicating with the operation device 3. The communication method of the communication unit 11 is not particularly limited, but may be, for example, a wireless communication method such as the short-range wireless communication standard RF4CE (Radio Frequency for Consumer Electronics) or Bluetooth (registered trademark).

[0032] The drive unit 12 generates a drive signal in response to a command from the control unit 13 and outputs the drive signal to the motor 8 to drive or stop the motor 8 .

[0033] The control unit 13 is composed of a microprocessor such as a CPU or MPU, a microcontroller such as an MCU, a storage device, and the like, and controls the driving of the motor 8 in response to the operation of the switch of the operating device 3 in the electric mode.

[0034] In the electric mode, the control unit 13 controls the opening and closing operation of the shutter curtain 4 by controlling the rotation of the motor 8 based on the first operation signal or the second operation signal from the operation device 3. In addition, in the electric mode, the control unit 13 stops the opening and closing operation of the shutter curtain 4 by stopping the rotation of the motor 8 based on a stop signal from the operation device 3.

[0035] When the control unit 13 receives a first operation signal corresponding to the open switch SWo from the operation device 3 via the communication unit 11 in the electric mode, the control unit 13 outputs an open command to the drive unit 12 to wind the shutter curtain 4 around the shaft 7 and perform an open operation. The drive unit 12 rotates the motor 8 in the forward direction to perform an open operation of the shutter curtain 4.

[0036] When the control unit 13 receives a second operation signal corresponding to the close switch SWc from the operation device 3 via the communication unit 11 in the electric mode, the control unit 13 outputs a close command to the drive unit 12 to unwind the shutter curtain 4 from the shaft 7 and perform a closing operation. The drive unit 12 reverses the motor 8 to perform a closing operation of the shutter curtain 4.

[0037] When the control unit 13 receives a stop signal corresponding to the stop switch SWt from the operation device 3 in the electric mode, the control unit 13 outputs a stop command to the drive unit 12 to stop the operation of the shutter curtain 4. The drive unit 12 stops the rotation of the motor 8 to stop the opening and closing operation of the shutter curtain 4.

[0038] The control unit 13 controls the power supply to the motor 8 based on an operation signal from the operating device 3, thereby opening or closing the shutter curtain 4 between the upper limit position Pu and the lower limit position Pl. The opening or closing operation of the shutter curtain 4 is referred to as the opening / closing operation in the following description. The upper limit position Pu is the fully open position where the shutter curtain 4 is fully open. The lower limit position Pl is the fully closed position where the shutter curtain 4 is fully closed.

[0039] When the control unit 13 receives a first operation signal from the operating device 3 via the communication unit 11, it outputs an opening command to the drive unit 12 to wind the shutter curtain 4 around the shaft 7 and perform an opening operation. The drive unit 12 rotates the motor 8 in the forward direction to perform an opening operation of the shutter curtain 4.

[0040] When the control unit 13 receives a second operation signal from the operating device 3 via the communication unit 11, it outputs a close command to the drive unit 12 to unwind the shutter curtain 4 from the shaft 7 and perform a closing operation. As a result, the drive unit 12 rotates the motor 8 in the reverse direction to perform a closing operation of the shutter curtain 4.

[0041] When the control unit 13 receives a stop signal from the operating device 3, it outputs a stop command to the driving unit 12 to stop the operation of the shutter curtain 4. As a result, the driving unit 12 stops the rotation of the motor 8 to stop the opening and closing operation.

[0042] The control unit 13 always recognizes the position of the shutter curtain 4 in the electric mode. For example, the control unit 13 always recognizes the current position of the shutter curtain 4 in the electric mode as a recognized position P based on the rotation of the motor 8, and controls the opening and closing operation of the shutter curtain 4 while storing the recognized position P in a volatile memory in the device as needed.

[0043] For example, when opening the shutter curtain 4 to a fully open state, the control unit 13 determines whether or not the position of the shutter curtain 4 has reached the upper limit position Pu while executing the opening operation of the shutter curtain 4. Then, when the control unit 13 determines that the position of the shutter curtain 4 has reached the upper limit position Pu, it determines that the shutter curtain 4 is in the fully open state and stops the opening operation of the shutter curtain 4.

[0044] When closing the shutter curtain 4 to a fully closed state, the control unit 13 determines whether or not the position of the shutter curtain 4 has reached the lower limit position Pl while performing the closing operation of the shutter curtain 4. When the control unit 13 determines that the position of the shutter curtain 4 has reached the lower limit position Pl, it determines that the shutter curtain 4 is in a fully closed state and stops the closing operation of the shutter curtain 4.

[0045] For example, the position recognized by the shutter curtain 4 is the position of the baseboard portion 4b, which is the lowest end of the shutter curtain 4, and is the count value N of the position pulse output from the output unit 9. The control unit 13 counts the position pulses and recognizes the position of the shutter curtain 4 based on the count value N.

[0046] For example, the control unit 13 presets, as an initial setting, the count value N when the shutter curtain 4 is in a fully open state as a threshold value Nuth. The control unit 13 presets, as an initial setting, the count value N when the shutter curtain 4 in a fully open state is lowered until it is in a fully closed state, with the upper limit position Pu as a reference position, as a threshold value Nlth. The control unit 13 then controls the shutter curtain 4 to a fully open state or a fully closed state, using the threshold values ​​Nuth and Nlth determined by the initial setting. The count value N when the shutter curtain 4 in a fully open state is lowered until it is in a fully closed state, with the upper limit position Pu as a reference position, indicates the distance between the upper limit position Pu and the lower limit position Pl.

[0047] When the shutter curtain 4 is closing, the control unit 13 updates the count value N by adding the number of position pulses to the current count value N. When the count value N reaches a threshold value Nlth, the control unit 13 determines that the position of the shutter curtain 4 is at the lower limit position Pl and that the shutter curtain 4 is in a fully closed state. When the shutter curtain 4 is opening, the control unit 13 updates the count value N by subtracting the number of position pulses from the current count value N. When the count value N reaches a threshold value Nuth, the control unit 13 determines that the position of the shutter curtain 4 is at the upper limit position and that the shutter curtain 4 is in a fully open state.

[0048] When the opening / closing operation mode of the shutter curtain 4 is switched from the electric mode to the manual mode by the user operating the switching unit 19, the shaft 7 is disconnected from the drive shaft of the motor 8. Even if the user manually opens or closes the shutter curtain 4 in the manual mode, the output unit 9 does not output a position pulse signal. Since the control unit 13 cannot recognize the position of the shutter curtain 4 in the manual mode, an error occurs between the actual current position of the shutter curtain 4 and the recognized position P, which is the position recognized by the electric shutter device.

[0049] In the electric shutter device 2, when the opening / closing operation mode of the shutter curtain 4 is switched from manual mode to electric mode, a return process is performed to correct the recognized position P to a correct value. Correcting the recognized position P includes rewriting and updating. When the opening / closing operation mode of the shutter curtain 4 is switched from manual mode to electric mode, the electric shutter device 2 recognizes the accurate recognized position P by executing the return process.

[0050] Hereinafter, the functional units of the control unit 13 for executing the restoration process of the shutter control device 10 according to the embodiment will be described with reference to FIG.

[0051] As shown in FIG. 3, the control unit 13 includes a drive control unit 14, a load detection unit 15, a processing unit 16, and a storage unit 17.

[0052] The recognition position P is stored in the storage unit 17 by the processing unit 16. For example, the storage unit 17 is a volatile memory.

[0053] The drive control unit 14 controls the opening and closing operation of the shutter curtain 4 based on a combination of the operation signal received from the operation device 3 and the position information of the shutter curtain 4 stored in the storage unit 17 .

[0054] When the manual mode is switched to the electric mode and the return process is not completed, the drive control unit 14 acquires an operation signal from the operation device 3 via the communication unit 11 and reads the recognition position P from the storage unit 17. The drive control unit 14 selects whether to execute the opening operation or the closing operation of the shutter curtain 4 based on the combination of the operation signal and the recognition position P, and executes the selected operation.

[0055] When the drive control unit 14 acquires a first operation signal after switching from the manual mode to the electric mode, the drive control unit 14 executes the opening operation of the shutter curtain 4 on the condition that the recognition position P is not the upper limit position Pu. "The recognition position P is not the upper limit position Pu" indicates that the recognition position P is the lower limit position Pl, or that the recognition position P is an intermediate position between the upper limit position Pu and the lower limit position Pl.

[0056] When the drive control unit 14 acquires a second operation signal after switching from the manual mode to the electric mode, the drive control unit 14 executes the opening operation of the shutter curtain 4 on the condition that the recognition position P is not the lower limit position Pl. "The recognition position P is not the lower limit position Pl" indicates that the recognition position P is the upper limit position Pu or that the recognition position P is an intermediate position.

[0057] If an abnormality is detected by an abnormality detection process that detects an abnormality in the load acting on the shutter curtain 4 during the opening or closing operation of the shutter curtain 4, the drive control unit 14 stops the opening or closing operation of the shutter curtain 4. If an abnormality in the load acting on the shutter curtain 4 is detected during the opening operation of the shutter curtain 4, the drive control unit 14 stops the opening operation of the shutter curtain 4. If an abnormality in the load acting on the shutter curtain 4 is detected during the closing operation of the shutter curtain 4, the drive control unit 14 stops the closing operation of the shutter curtain 4 and performs an opening operation. Hereinafter, the transition from the closing operation of the shutter curtain 4 to the opening operation is referred to as "reverse rising", and the transition from the opening operation of the shutter curtain 4 to the closing operation is referred to as "reverse descent".

[0058] The load detection unit 15 detects a motor load, which is a load applied to the motor 8. The load detection unit 15 includes a counter 151 and a load measurement unit 152.

[0059] When the return process is executed, the counter 151 starts counting the number of position pulses. The load measurement unit 152 measures the motor load based on the position pulse output from the output unit 9. For example, the load measurement unit 152 measures the pulse width of the position pulse output from the output unit 9 as the motor load for each position pulse, which is each count value N of the counter 151.

[0060] The pulse width of the position pulse increases as the rotation speed of the motor 8 decreases, and decreases as the rotation speed of the motor 8 increases. When the shutter curtain 4 reaches the upper limit position Pu and the baseboard 4b comes into contact with the bamboo grass or the shutter box 6, a load is applied to the motor 8, and the motor 8 enters an overloaded state, so that the rotation speed of the motor 8 decreases and the pulse width of the position pulse increases.

[0061] When the shutter curtain 4 reaches the lower limit position Pl and the baseboard portion 4b abuts against the floor surface or the sill, and the closing operation continues, the baseboard portion 4b presses against the floor surface or the sill. As the closing operation continues, a load is applied to the motor 8, and the motor 8 enters an overloaded state, causing the rotation speed of the motor 8 to slow down and the pulse width of the position pulse to increase. The load measurement unit 152 measures the pulse width of the position pulse for each position pulse, which is equal to each count value N, and calculates the pulse width of the motor 8 as the motor load. The load measurement unit 152 associates the count value N with the motor load and outputs it to the processing unit 16.

[0062] The processing unit 16 includes an abnormality detection unit 161 , a selection unit 162 , an upper limit detection unit 163 , a lower limit detection unit 164 , and a recognition unit 165 .

[0063] The abnormality detection unit 161 executes an abnormality detection process to detect an abnormality in the shutter curtain 4 during the opening and closing operation of the shutter curtain 4 in the electric mode. An abnormality in the shutter curtain 4 is an abnormality in the load acting on the shutter curtain 4. An "abnormal load" is when an overload, which is a load larger than that during normal opening and closing operation, acts on the shutter curtain 4. The load acting on the shutter curtain 4 is a motor load.

[0064] The abnormality detection unit 161 monitors the motor load output from the load measurement unit 152 during the opening and closing operation of the shutter curtain 4, and judges whether or not the motor 8 is in an overload state based on the motor load. For example, the abnormality detection unit 161 judges that the motor 8 is in an overload state when the motor load or the rate of change of the motor load exceeds a threshold value.

[0065] When the abnormality detection unit 161 determines that the motor 8 is in an overload state during the opening and closing operation of the shutter curtain 4, it determines that an abnormality has occurred in the operation of the shutter curtain 4, and transmits the determination result to the drive control unit 14. The abnormality detection process of the abnormality detection unit 161 functions, for example, as obstacle detection that detects that the shutter curtain 4 has come into contact with an obstacle. For example, the motor load becomes an overload state due to the shutter curtain 4 coming into contact with an obstacle.

[0066] When the abnormality detection unit 161 detects an overload state of the motor load through the abnormality detection process, it stops the opening and closing operation of the shutter curtain 4, thereby preventing accidents caused by obstacles such as people or brought-in objects being pinched by the shutter curtain 4. The abnormality detection process has a function of obstacle detection that detects that the shutter curtain 4 has come into contact with an obstacle in order to prevent accidents caused by obstacles such as people or brought-in objects being pinched by the shutter curtain 4.

[0067] When an abnormality is detected by the abnormality detection unit 161 after switching from the manual mode to the electric mode, the selection unit 162 selects either an upper limit detection process for detecting a fully open state of the shutter curtain 4, or a lower limit detection process for detecting a fully closed state of the shutter curtain 4. For example, when the selection unit 162 determines that the manual mode has been switched to the electric mode based on the switching result from the switching unit 19, it selects either an upper limit detection process or a lower limit detection process as the process to be used for the return process.

[0068] For example, the selection unit 162 selects the lower limit detection process when an abnormality is first detected by the abnormality detection process during an opening operation after switching from the manual mode to the electric mode, and after the detection of the abnormality, the close switch SWc is operated to acquire a second operation signal. The selection unit 162 may select the lower limit detection process when an abnormality is first detected by the abnormality detection process during an opening operation after switching from the manual mode to the electric mode. The selection unit 162 selects the upper limit detection process when an abnormality is first detected by the abnormality detection process during a closing operation after switching from the manual mode to the electric mode.

[0069] When the upper limit detection process is selected by the selection unit 162 and an opening operation including a reverse upward movement is performed, the upper limit detection unit 163 executes the upper limit detection process based on the motor load output from the load detection unit 15. For example, the upper limit detection unit 163 determines whether the motor 8 is in an overload state based on the motor load output from the load detection unit 15. For example, in the upper limit detection process mode, when the motor load or the rate of change of the motor load exceeds a threshold value while the shutter curtain 4 is moving to the upper limit position, the upper limit detection unit 163 determines that the motor 8 is in an overload state. When the upper limit detection unit 163 determines that the motor 8 is in an overload state in the upper limit detection process, it determines that the shutter curtain 4 is in a fully open state. For example, the upper limit detection unit 163 detects the upper limit position Pu by detecting the overload state of the motor 8.

[0070] When the upper limit detection unit 163 uses overload detection, which detects an overload state of the motor 8 based on the motor load, for the upper limit detection process, the motor 8 detects the overload state not at the upper limit position Pu where the baseboard portion 4b abuts against the shim or the shutter box 6, but at the tightening position where the shutter curtain 4 is further opened from the upper limit position Pu and tightened. However, the distance ΔH1 between the tightening position and the upper limit position Pu, for example, the number of position pulse counts, can be obtained in advance by experiment or the like. The upper limit detection unit 163 can obtain the upper limit position Pu from the tightening position using the known distance ΔH1. The upper limit detection unit 163 can detect the upper limit position Pu by detecting the tightening position.

[0071] When the selection unit 162 selects the lower limit detection process and the closing operation is performed, the lower limit detection unit 164 executes the lower limit detection process based on the motor load output from the load detection unit 15. For example, the lower limit detection unit 164 determines whether the motor 8 is in an overload state based on the motor load output from the load detection unit 15. For example, the lower limit detection unit 164 determines that the motor 8 is in an overload state when the motor load or the rate of change of the motor load exceeds a threshold value while the shutter curtain 4 is moving to the lower limit position. When the lower limit detection unit 164 determines that the motor 8 is in an overload state in the lower limit detection process, it determines that the shutter curtain 4 is in a fully closed state. For example, the lower limit detection unit 164 detects the lower limit position Pl by detecting the overload state of the motor 8.

[0072] When using overload detection to detect an overload state of the motor 8 based on the motor load, the lower limit detection unit 164 detects an overload state of the motor 8 not at the lower limit position Pl where the baseboard portion 4b abuts against the floor surface or the sill, but at a pushed-in position where the shutter curtain 4 is further closed from the lower limit position Pl and pushed into the floor surface or the sill. The distance ΔH2 between the pushed-in position and the lower limit position Pl, for example, the number of position pulse counts, can be obtained in advance by experiment or the like. The lower limit detection unit 164 can obtain the lower limit position Pl from the pushed-in position using the known distance ΔH2. The lower limit detection unit 164 can detect the lower limit position Pl by detecting the pushed-in position.

[0073] The processing unit 16 performs upper limit detection processing when an opening operation of the shutter curtain 4 is performed as the first opening / closing operation after an abnormality in the shutter curtain 4 is first detected due to abnormality detection after switching from manual mode to electric mode, and performs lower limit detection processing when a closing operation of the shutter curtain 4 is performed as the first opening / closing operation.

[0074] When the processing unit 16 detects an abnormality in the shutter curtain 4 for the first time due to abnormality detection after switching to the electric mode, the processing unit 16 stops the shutter curtain 4 and then operates the shutter curtain 4 a predetermined first distance in the opposite direction to the immediately preceding operation. As an example, the first distance is the distance when the motor 8 rotates 350 pulses. When the processing unit 16 detects an abnormality while the shutter curtain is operating to the upper limit position, the processing unit 16 stops the shutter curtain 4 and then moves the shutter curtain 4 the first distance with a closing operation. When the processing unit 16 detects an abnormality while the shutter curtain is operating to the lower limit position, the processing unit 16 stops the shutter curtain 4 and then moves the shutter curtain 4 the first distance with an opening operation.

[0075] The recognition unit 165 recognizes the current position of the shutter curtain 4 based on the count value N, and updates the recognized position P of the storage unit 17 to the recognized current position. For example, when the count value N reaches a count value Nlth, the recognition unit 165 recognizes that the current position of the shutter curtain 4 is the lower limit position Pl, and updates the recognized position of the storage unit 17 to the lower limit position Pl.

[0076] When the count value N reaches the count value Nuth, the recognition unit 165 recognizes that the current position of the shutter curtain is the upper limit position Pu, and updates the recognized position of the storage unit 17 to the upper limit position Pu. When the count value N does not reach either the count value Nlth or the count value Nuth, the recognition unit 165 recognizes that the current position of the shutter curtain is an intermediate position, and updates the recognized position of the storage unit 17 to the intermediate position.

[0077] When an overload of the motor 8 is detected in the upper limit detection process, the recognition unit 165 recognizes that the current position of the shutter curtain 4 is the tightening position, and updates the recognized position P of the storage unit 17 to the tightening position. When an overload of the motor 8 is detected in the lower limit detection process, the recognition unit 165 recognizes that the current position of the shutter curtain 4 is the pushed-in position, and updates the recognized position P of the storage unit 17 to the pushed-in position.

[0078] [First embodiment of recovery process] The operation of the first embodiment of the return process in the electric shutter device 2 will be described with reference to Fig. 4 and Fig. 5. The return process is assumed to be performed when a closing operation is performed in manual mode and when an opening operation is performed. The return process after a closing operation and the return process after an opening operation are in a vertically reversed relationship, so the return process after an opening operation in manual mode will be described below.

[0079] [When shutter curtain 4 is manually moved from the lower limit to near the upper limit] It is assumed that, with power being applied to the electric shutter device 2, the user manually moves the shutter curtain 4, which is in the fully closed state at the lowest position, to near the uppermost position in manual mode, and then switches to electric mode.

[0080] When the user switches to the manual mode, the control unit 13 stores the lower limit position Pl as the recognition position P, so even if the user operates the close switch SWc, the control unit 13 does not close the shutter curtain 4. When the mode is switched to the electric mode, only the opening operation of the shutter curtain 4 is enabled.

[0081] As shown in Fig. 4, when the open switch SWo is operated in step S1 and the control unit 13 receives a first operation signal that is an "open command", it determines in step S2 that the close obstacle detection flag is not present. If the close obstacle detection flag is not present in step S2, the control unit 13 determines in step S3 whether the current position is the fully open position or is more open than the fully open position. If the current position is the fully open position or is more open than the fully open position, the control unit 13 stops the processing in step S4 as shown in Fig. 5.

[0082] If the closed obstacle detection flag is set in step S2, the control unit 13 opens the shutter curtain 4 in step S5. If the shutter curtain 4 is in the lower limit position and the closed obstacle detection flag is set before the user switches to the manual mode, the control unit 13, which has determined that the closed obstacle detection flag is set in step S2, opens the shutter curtain 4 in step S5.

[0083] Even if the shutter curtain 4 is on the open side of the lower limit position and there is no closed obstacle detection flag before the user switches to manual mode, if the current position is on the closed side of the fully open position in step S3, the control unit 13 opens the shutter curtain 4 toward the upper limit position in step S5.

[0084] When the shutter curtain 4 starts to open, the counter 151 counts the number of pulses from the start of the operation in step S6, and the pulse for the current position is updated in step S7.

[0085] In step S8, the control unit 13 determines whether 10 pulses have passed since the start of operation. If 10 pulses have not passed since the start of operation, the control unit 13 executes the processes in step S2 and after. If the control unit 13 determines that 10 pulses have passed since the start of operation, the control unit 13 starts the second logic in step S9. The second logic is a logic that starts obstacle detection after 10 pulses have passed since the start of operation.

[0086] For example, the threshold for detecting an abnormality in the second logic can be determined from the motor load value when the lower limit is estimated by the first logic described later during the recovery process. This determination makes it possible to increase the sensitivity of the second logic, which has a lower load sensitivity than the first logic that matches different motor load values ​​depending on the size of the shutter curtain 4, etc. The threshold for the second logic may be changeable in sensitivity using the operating device 3 during the recovery process.

[0087] When the second logic is started, the control unit 13 determines whether an abnormality is detected in step S10. If an abnormality is detected in step S10, the control unit 13 stops the opening operation of the shutter curtain 4 in step S11.

[0088] When the opening operation of the shutter curtain 4 is stopped, in step S12, the control unit 13 moves the shutter curtain 4 a first distance in a closing operation that is the opposite direction to the immediately preceding operation. In step S12, the control unit 13 moves the shutter curtain 4 a distance corresponding to 350 pulses, as an example, in the closing operation. Even if the recognized position P is the fully closed position, the actual position is closer to the open side than the fully closed position, so the shutter curtain 4 can move to the closing side.

[0089] When the shutter curtain 4 moves a first distance in the closing operation, the control unit 13 stores a current position pulse in step S13. After storing the current position pulse in step S13, the control unit 13 stops the process in step S4.

[0090] If no abnormality is detected in step S10, the control unit 13 determines whether the valve has moved a second distance or more since the start of the operation. The second distance is a distance smaller than the first distance for the closing operation in step S12. As an example, the second distance is a distance corresponding to 300 pulses in the opening operation. If no abnormality is detected in step S10, the control unit 13 determines in step S14 whether 300 pulses have passed since the start of the operation. If 300 pulses have not passed since the start of the operation, the control unit 13 executes the processing from step S2 onwards.

[0091] When the control unit 13 determines that 300 pulses have elapsed since the start of operation and that the robot has moved a second distance or more since the start of operation, the control unit 13 starts the first logic in step S15. The first logic is a logic for starting obstacle detection after 300 pulses have elapsed since the start of operation.

[0092] When the first logic is started, the control unit 13 determines whether or not an abnormality is detected in step S16. If no abnormality is detected in step S16, the control unit 13 executes the processes in and after step S2.

[0093] When an abnormality is detected in step S16, in step S17, the control unit 13 stops the opening operation of the shutter curtain 4. When the opening operation of the shutter curtain 4 is stopped, in step S18, the control unit 13 closes the shutter curtain 4 for one second and moves it from the tightening position to the fully open position.

[0094] When the shutter curtain 4 is moved to the fully open position, the control unit 13 updates the current position as the fully open position in step S19. When the control unit 13 updates the current position as the fully open position, the control unit 13 initializes the closure abnormality detection flag in step S20. After initializing the closure abnormality detection flag, the control unit 13 stops the process in step S4.

[0095] In the electric shutter device 2, for example, in a powered state, the user manually moves the shutter curtain 4, which is in the lower limit position in the fully closed state, to near the upper limit position in the manual mode, then switches to the electric mode, and in a state where there is no closed obstacle detection flag, presses the open switch SWo by operating the operation device 3, thereby sequentially executing steps S1-S3, S5-S13, and S4 in the first return process flow. By executing the return process flow, the shutter curtain 4 is moved a first distance from the fully open position to the closed side.

[0096] When the user operates the operating device 3 to press the open switch SWo to perform the next open operation from a position moved a first distance toward the closed side from the fully open position, steps S1-S3, S5-S10, S14-S20 and S4 in the second return processing flow are executed sequentially.

[0097] In step S14 of the second return processing flow, it is determined whether 300 pulses have passed since the start of operation, thereby determining whether the operation has moved a second distance or more since the start of operation. However, in step S12 of the first return processing flow, the shutter curtain 4 has moved a first distance which is greater than the second distance, so steps S2-S3, S5-S10, and S14-S16 in the return processing flow are repeatedly executed in sequence until the shutter curtain 4 reaches the fully open position and an abnormality is detected in step S16.

[0098] In the second return processing flow, the closed abnormality detection flag is initialized in step S20 after the fully open position is updated, so that when power is applied to the electric shutter device 2, the return is completed when the user manually moves the shutter curtain 4 in manual mode and then switches to electric mode.

[0099] In the electric shutter device 2, even if the shutter curtain 4 is manually operated while power is being supplied, if an abnormality is detected during the first return process while the shutter curtain 4 is moving to the upper or lower limit position, the shutter curtain 4 is moved a first distance in the opposite direction to the previous operation, so that when an abnormality is detected in the second return process flow and the shutter curtain 4 is moved to the fully open position, the actual current position of the shutter curtain 4 can be made to match the recognized position P of the shutter curtain 4 recognized by the electric shutter device 2. In the electric shutter device 2, the shutter curtain can be opened and closed accurately electrically without turning off the power supply and performing a power outage recovery operation.

[0100] In the electric shutter device 2, if an abnormality is detected when the shutter curtain 4 is operated a second distance or more that is shorter than the first distance, the upper limit position is updated, so that the recognized upper limit position can be set to the actual upper limit position.

[0101] [Second embodiment of recovery process] The operation of the second embodiment of the return process in the electric shutter device 2 will be described with reference to Figures 6 to 7. In these figures, the same components as those in the first embodiment shown in Figures 4 and 5 are given the same reference numerals, and their description will be omitted. In the second embodiment of the return process, the processes in steps S2 and S12 are different from the first embodiment.

[0102] In the second embodiment of the recovery process, as shown in Fig. 6, when the open switch SWo is operated and a first operation signal that is an "open command" is received in step S1, the control unit 13 determines that there is no abnormality detection flag in step S2. The abnormality detection in step S2 is, for example, at least one of an obstacle detection and a power outage detection.

[0103] If there is no abnormality detection flag in step S2, the control unit 13 determines in step S3 whether the current position is the fully open position or is more open than the fully open position. If the current position is the fully open position or is more open than the fully open position, the control unit 13 stops the process in step S4 as shown in FIG.

[0104] If the abnormality detection flag is set in step S2, the control unit 13 executes the processes from step S5 onwards which are described in the first embodiment of the recovery process.

[0105] In step S12 of the processing from step S5 onwards, the control unit 13 moves the shutter curtain 4 in a closing operation that is the opposite direction to the immediately preceding closing operation, for a longer period of time than the closing operation of the shutter curtain 4 executed in step S18. In step S12, the control unit 13 closes the shutter curtain 4 for, for example, two seconds. After closing the shutter curtain 4 for, for example, two seconds in step S12, the control unit 13 executes the processing from step S19 onwards.

[0106] The abnormality detection in step S10 of the second logic executed before step S12 has a lower load sensitivity than the abnormality detection in step S16 of the first logic executed before step S18. If an abnormality is detected in step S10, which has a lower load sensitivity, the stopping of the opening operation of the shutter curtain 4 in step S11 is delayed, and the shutter curtain 4 may be pushed to the open side.

[0107] In the embodiment of the recovery process, even if the stopping of the opening operation of the shutter curtain 4 is delayed and the shutter curtain 4 is pushed to the open side, it is possible to rewind the shutter curtain 4 in step S12. Also, even if the shutter curtain 4 is stopped due to abnormality detection of different sensitivities, it is possible to initialize the abnormality detection flag and return to normal by rewinding the shutter curtain 4 by an amount corresponding to each sensitivity.

[0108] Although the preferred embodiments of the present disclosure have been described above with reference to the accompanying drawings, it goes without saying that the present disclosure is not limited to the examples. The shapes and combinations of the components shown in the above examples are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present disclosure.

[0109] For example, in the electric shutter device 2, when an abnormality is detected in step S16 in the second return process flow, the current position is updated to the fully open position in step S19, but the present invention is not limited to this configuration. The upper limit position may be updated when an abnormality is detected in the first return process flow, and the upper limit position may be updated when an abnormality is also detected in step S16 in the second return process flow.

[0110] The electric shutter device 2 may be configured such that, if an abnormality is detected less than the threshold value from the start of the movement of the shutter curtain 4 to the upper limit position, the detection operation for the lower limit position is performed in the next closing operation.

[0111] The whole or part of the control unit 13 in the embodiment may be realized by a computer. In this case, the computer may include a processor such as a CPU or a GPU, and a computer-readable recording medium. The whole or part of the functions of the control unit 13 may be realized by recording a program for realizing the functions of the computer in a computer-readable recording medium, and reading and executing the program recorded in the recording medium into the processor. The "computer-readable recording medium" refers to a portable medium such as a flexible disk, an optical magnetic disk, a ROM, a CD-ROM, and a storage device such as a hard disk built into a computer system. The "computer-readable recording medium" may also include a medium that dynamically holds a program for a short period of time, such as a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line, and a medium that holds a program for a certain period of time, such as a volatile memory inside a computer system that is a server or a client in that case. The program may be a program for realizing a part of the functions described above, may be a program that can realize the functions described above in combination with a program already recorded in the computer system, or may be a program that is realized using a programmable logic device such as an FPGA. [Explanation of symbols]

[0112] 1...shutter system, 2...electric shutter device, 3...operation device, 4 shutter curtain, 8...motor, 10...shutter control device, 13...control unit, 14...drive control unit, 17...storage unit

Claims

1. The shutter curtain can be switched between an electric mode in which the shutter curtain is opened and closed electrically and a manual mode in which the shutter curtain can be opened and closed manually while energized. A control unit that executes abnormality detection to detect an abnormality in a load acting on the shutter curtain during the opening and closing operation in the electric mode, In an electric shutter device, when the control unit detects the abnormality during operation of the shutter curtain to an upper limit position or a lower limit position, the control unit operates the shutter curtain to the first distance in the opposite direction to the previous operation when the abnormality is detected during operation of the shutter curtain to a second distance that is shorter than a predetermined first distance.

2. The control unit updates the upper limit position or the lower limit position at which the abnormality was detected after operating the shutter curtain at the first distance. The electric shutter device according to claim 1.

3. The control unit is A storage unit in which position information of the shutter curtain in the electric mode is stored; A drive control unit that controls the opening and closing operation based on a combination of an operation signal that instructs an opening operation or closing operation of the shutter curtain received from an operating device and the position information; having updating the upper limit position or the lower limit position when the abnormality is detected when the shutter curtain is operated at the second distance or more, which is shorter than the first distance, toward the upper limit position or the lower limit position where the abnormality was detected in response to an instruction of the operation signal after the shutter curtain is operated at the first distance; The electric shutter device according to claim 2.

4. The control unit detects the abnormality less than a threshold value from the start of the operation of the shutter curtain to the upper limit position, and then performs the detection operation of the lower limit position in the next closing operation. The electric shutter device according to claim 3.

5. A first logic is executed when the shutter curtain is moved to the upper limit position or the lower limit position by a distance equal to or greater than the second distance from the start of the movement of the shutter curtain to the upper limit position or the lower limit position, and a second logic is executed when the shutter curtain is moved to the lower limit position by a distance less than the second distance. having The electric shutter device according to any one of claims 1 to 4.

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