Opening / closing device and opening / closing control method

Abstract

To allow a continued operation to improve user convenience if safety can be ensured even if a protection circuit is activated.SOLUTION: To prevent a false detection, a protection circuit 30 is enabled to stop operation only when an overcurrent error is detected twice in a row. This allows a continued operation if safety can be ensured even when the protection circuit is activated, thereby improving user convenience. When opening and closing operation is continued at a speed slower than normal operation speed, the operation speed is set to 50% of the normal speed, and an error lamp blinks during operation to alert a user. If the number of operations is equal to or less than a predetermined number of times (for example 30-50 times) after the error is cleared, protective means works to stop the operation when the overcurrent error is detected. If the number of operations of opening and closing means is equal to or greater than the predetermined number of times after the error is cleared, the overcurrent error is regarded as the false detection and the opening and closing operation is continued at the slower speed than the normal operation speed.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an opening / closing body device and an opening / closing system control method configured to partition an opening of a structure body including buildings such as houses, buildings, factories, warehouses, and garages using an opening / closing body such as a shutter. In particular, the present invention relates to an opening / closing body device and an opening / closing system control method suitable for preventing malfunction when detecting displacement of peripheral objects of an opening and automatically operating the opening / closing body.

Background Art

[0002] An opening / closing body device such as a shutter curtain is installed at an entrance / exit, window, or an opening such as an internal passage or space of a structure body including buildings such as houses, buildings, factories, warehouses, and garages, and the opening is opened or closed by moving the opening / closing body. This opening / closing body device is configured to close the entire opening by feeding out and lowering an opening / closing body such as a slat curtain composed of a large number of strip-shaped slat materials, a pipe grille curtain formed by connecting a large number of pipe materials with link materials, etc., a panel curtain composed of a single or multiple connected panel materials, a net curtain composed of a net material, a sheet curtain composed of a synthetic resin or cloth fiber sheet material, or a composite curtain composed of these composite members, etc. from the upper part of the opening. Such an opening / closing body device often performs the opening / closing operation of the opening / closing body electrically. Examples of electrically operated opening / closing body devices include electric shutter devices, electric door devices, and electricawning devices.

[0003] Generally, electric opening and closing devices are designed to raise and lower an opening and closing body for opening and closing spaces in structures such as buildings, and these bodies are driven up and down by an opening and closing mechanism (motor, etc.) located in the ceiling space of the structure or in the shutter case. Some of these electric opening and closing devices are equipped with sensors that detect the displacement of objects around the opening, and when the sensors detect the displacement of objects around the opening, they automatically open the closed opening and closing body, assuming that a person or vehicle is approaching the opening. For example, electric opening and closing devices that use a sheet curtain made of sheet material as the opening and closing body are often installed at doorways (openings) where people and vehicles frequently enter and exit, so most of them perform the opening and closing operation of the opening and closing body automatically. Patent Document 1 discloses a sheet shutter device equipped with first and second activation sensors, respectively, which are provided on the front and back of the upper part of the doorway, to detect people or vehicles passing near the doorway. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2006-9450 [Overview of the project] [Problems that the invention aims to solve]

[0005] Normally, power supply units that supply commercial power to the control devices of switchgear are equipped with a protective circuit that cuts off the power supply to the commercial power supply unit for safety reasons. The protective circuit cuts off the power supply to the commercial power supply unit when an abnormal overcurrent flows through the power supply unit due to factors such as overload or short circuit. Once the power supply is cut off, the operator must manually restore power to the protective circuit (clear the error). This allows the switchgear unit to stop operating immediately if the protective circuit is activated. However, there was a problem in that even if the protective circuit was activated temporarily due to a false detection rather than a malfunction, or even if it would normally be safe to continue operating, once the protective circuit was activated, the switchgear unit could not be used again until the error clearing operation was performed.

[0006] The present invention has been made in view of the above points, and aims to provide an open / close device and an open / close control method that can continue operation even when a protective circuit is activated if safety can be ensured, thereby improving user convenience. [Means for solving the problem]

[0007] The first feature of the opening / closing device of the present invention is an opening / closing device comprising: an opening / closing means provided on the periphery of an opening; an opening / closing mechanism for electrically operating the opening / closing means; a control means for driving the opening / closing mechanism and electrically controlling the operation of the opening / closing means; a power supply device for supplying power based on a commercial power source to the control means; and a protective means for cutting off the supply of power from the commercial power source to the power supply device when an overcurrent error is detected from the commercial power source to the power supply device, wherein when an overcurrent error is detected, the operating speed of the opening / closing means continues at a slower operating speed than the normal operating speed, and if the overcurrent error is detected again while the opening / closing means is operating at a slower operating speed than the normal operating speed, the supply of power from the commercial power source to the power supply device is immediately cut off. Conventionally, when an overcurrent error is detected, a protective mechanism activates and the operation stops. In this invention, to prevent false detections, the protective mechanism is activated and the operation stops only if an overcurrent error is detected twice in a row. This allows for continued operation even when the protective circuit is activated, provided safety can be ensured, thereby improving user convenience. Furthermore, if the operation speed is slower than the normal speed, the operation speed is set to 50% of the normal speed, and an abnormality lamp flashes during the opening and closing operation to warn the user.

[0008] A second feature of the switchgear device of the present invention is that, in the switchgear device described in the first feature, if the number of operations of the switchgear means after error clearing at the time the overcurrent error is detected is less than or equal to a predetermined number, the power supply of the commercial power to the power supply device is immediately cut off, and if the number of operations is greater than the predetermined number, the operation speed of the switchgear means is continued at an operation speed slower than the normal operation speed. This system works as follows: if the number of operations of the switching mechanism after the error is cleared is less than or equal to a predetermined number (e.g., 30 to 50 times), the protective mechanism activates and stops operation at the time the overcurrent error is detected. If the number of operations of the switching mechanism after the error is cleared is greater than the predetermined number (e.g., 30 to 50 times), the overcurrent error is considered a false detection and the system continues to operate at a slower operating speed than normal. The number of operations corresponds to the number of opening operations, closing operations, or switching operations.

[0009] The first feature of the opening / closing body control method of the present invention is an opening / closing body control method comprising: an opening / closing means provided on the periphery of an opening; an opening / closing device for electrically operating the opening / closing means; a control means for driving the opening / closing device and electrically controlling the operation of the opening / closing means; a power supply device for supplying power based on a commercial power source to the control means; and a protection means for cutting off the supply of power from the commercial power source to the power supply device when an overcurrent error is detected from the commercial power source to the power supply device, wherein when the first overcurrent error is detected, the operating speed of the opening / closing means is continued at a slower operating speed than the normal operating speed, and when the second overcurrent error is detected while the opening / closing means is operating at a slower operating speed than the normal operating speed, the supply of power from the commercial power source to the power supply device is immediately cut off. This invention relates to an opening / closing control method corresponding to the first feature of the opening / closing device.

[0010] A second feature of the switching mechanism control method of the present invention is that, in the switching mechanism control method described in the first feature, if the number of operations of the switching mechanism after the error clearing at the time when the overcurrent error is detected after the error clearing of the protection means is less than or equal to a predetermined number, the power supply of the commercial power to the power supply device is immediately cut off, and if the number of operations is greater than the predetermined number, the operating speed of the switching mechanism is continued at an operating speed slower than the normal operating speed. This invention relates to a method for controlling an opening / closing body, corresponding to the second feature of the opening / closing body device. [Effects of the Invention]

[0011] According to the present invention, even if the protection circuit is activated, if safety can be ensured, continued operation is possible, thereby improving user convenience. [Brief explanation of the drawing]

[0012] [Figure 1] This figure shows a schematic configuration of a shutter device, which is an opening and closing device according to one embodiment of the present invention. [Figure 2] Figure 1 is a diagram illustrating the operation of each component within the shutter device shown. [Figure 3] This figure shows the circuit configuration of a control device for a shutter device according to one embodiment of the present invention. [Figure 4] This flowchart shows an example of the operation process performed by the opening / closing device according to this embodiment. [Modes for carrying out the invention]

[0013] A preferred embodiment of the opening / closing device according to the present invention will be described below with reference to the attached drawings. In this embodiment, a shutter device equipped with a sheet curtain made of a sheet material that opens and closes vertically will be described as an example of an opening / closing means. Figure 1 is a diagram showing the schematic configuration of a shutter device which is an opening / closing device according to one embodiment of the present invention. In Figure 1, the opening / closing device 10 is a shutter device that opens and closes an entrance opening vertically.

[0014] The opening / closing device 10 is installed in the opening of a building and basically consists of a shutter case 11, a sheet curtain 12, guide rails 13 and 14, a winding shaft 15, a chain 16, a motor 17, a position detection device 172, a control device 18, an obstacle detection device 185, an operating switch 19, a power supply device 20, and a protection circuit 30. Under normal circumstances, the opening / closing device 10 controls the opening and closing by driving the motor 17, which is the opening / closing mechanism, in response to the operation of the operating switch 19.

[0015] The guide rails 13 and 14 are provided on both ends of the opening of the building so as to contact both ends of the sheet curtain 12, and are made of a metal member having a U-shaped guide groove extending from the sill portion to the floor surface or a member equivalent thereto. The sheet curtain 12 moves up and down along each guide groove of the guide rails 13 and 14 to perform the opening and closing operation of the opening.

[0016] The winding shaft 15 is rotatably provided on both ends of the shutter case 11 to wind up and unwind the sheet curtain 12. The chain 16 connects the driving sprocket provided on the rotating shaft of the motor 17 and the driven sprocket provided on the rotating shaft of the winding shaft 15. Therefore, the rotational driving force of the motor 17 is transmitted to the winding shaft 15 side via the chain 16, and when the motor 17 rotates, the winding shaft 15 rotates via the chain 16, and the opening and closing operation of the sheet curtain 12 is controlled.

[0017] The motor 17 is provided with a position detection device 172 (see Figure 2) for detecting its rotational position, that is, the opening and closing position and the opening and closing state of the sheet curtain 12. This position detection device 172 is composed of a pulse generation type rotary encoder or the like. Since a pulse signal corresponding to the rotation of the motor 17 is output to the control device 18, the control device 18 calculates based on the generation situation of this pulse to obtain the rotational position of the motor 17 and the position of the leading end of the closed side of the sheet curtain 12 at the opening, etc.

[0018] The control device 18 is configured as a microcomputer and is supplied with power from the power line AC of the commercial power supply via the power supply device 20. The control device 18 controls the rotation of the motor 17 or releases the holding mechanism based on the emergency signal BS based on the control signal corresponding to the operation state of each operation button on the operation switch 19, the detection signal from the obstacle detection device 185, and the signal from the position detection device 172 provided on the motor 17.

[0019] The operation switch 19 has an up (open) button 19A, a stop button 19B, and a down (close) button 19C as control switches corresponding to the opening, closing, and stopping operations, respectively, and outputs a control signal corresponding to the operation state of each button to the control device 18. Although not shown in FIG. 1, the control device 18 may also be operable by a wireless remote control device.

[0020] The emergency signal BS is a signal of voltage 24 [V] supplied from an external control room or the like in case of an emergency such as a fire, and is input to an interlock relay for hazard prevention (not shown) in the control device 18. In addition to, or instead of, the input of the emergency signal BS from the outside, a temperature sensor or the like may be provided inside the shutter case 11, near the opening of the hearth part, that is, in the part where the sheet curtain 12 moves up and down. As this temperature sensor, it is composed of an automatic reset type high temperature bimetal thermostat of B contact which is always in an on state and the contact opens and becomes an off state when the contact reaches a predetermined temperature (any temperature in the range of 100 to 300 degrees Celsius). When the contact opens, a signal indicating that a fire or the like has occurred may be output as a signal corresponding to the emergency signal BS.

[0021] The obstacle detection device 185 has a transmitter provided at the lower end (seat plate) of the sheet curtain 12. When an obstacle is detected, it transmits a detection signal corresponding to the movement of the built-in seat plate switch to the control device 18. Also, when the seat plate switch moves back due to the removal of the obstacle thereafter, it transmits a return signal. The transmission of the signal from the transmitter of the obstacle detection device 185 to the control device 18 is not limited to the wired method as shown in the figure, and may also be a wireless method that operates with a battery as a power source. Also, a seat plate switch that moves when an obstacle contacts the lower end of the sheet curtain 12 may be provided, and it may be configured to press a tape switch provided along the height direction of the guide rails 13, 也可以是从磁带开关向控制装置18有线输出检测信号的结构。另外,也可以在开口部设置光电管、LED等投受光传感器,通过图像识别等非接触地检测障碍物。

[0022] The power supply device 20 receives AC power from the commercial power supply line AC and supplies AC power to the control device 18 if the motor 17 is an AC motor, or DC power obtained by converting the AC power to DC if the motor 17 is a DC motor. In this embodiment, the power supply device 20 is installed inside the shutter case 11, but the power supply device 20 may also be installed outside the shutter case 11. The protection circuit 30 cuts off the power supply to the power supply device 20 from the commercial power supply when an abnormal overcurrent flows through the power supply device 20 due to factors such as overload or short circuit. When the protection circuit 30 is in the cut-off state, the operator must manually restore power (clear the error).

[0023] Figure 2 is a diagram illustrating the operation of each component within the shutter device shown in Figure 1. The control device 18 controls the motor 17 based on signals from the operation switch 19, obstacle detection device 185, and position detection device 172, as well as the emergency signal BS, using power supplied from the power supply device 20. Note that in Figure 2, the connections to commercial power supplies other than the control device 18 are not shown.

[0024] Figure 3 shows the circuit configuration of a control device for a shutter device according to one embodiment of the present invention. The control device 18 in this embodiment is configured to include a motor drive circuit 18a and a CPU 18b, etc. The motor drive circuit 18a consists of an IPM (Intelligent Power Module) driver, etc., and under the control of the CPU 18b, outputs AC power or DC power supplied from the power supply device 20 to the control device 18 to the motor 17 to drive the motor 17.

[0025] Figure 4 is a flowchart showing an example of the operation process performed by the switchgear according to this embodiment. An example of the process performed by the switchgear will be explained below using these flowcharts. In this operation process, to prevent false detection, the protection circuit is activated and operation is stopped only if an overcurrent error is detected twice in a row.

[0026] An example of the operation process performed by the opening / closing device 10 will be described based on Figure 4. This operation process is the opening and closing operation of the sheet curtain 12, which is performed when the control device 18 receives a signal corresponding to the operation of the down (close) button 19C or the up (open) button 19A. Each time the opening / closing operation is performed, the operation count register is incremented. In step S61, it is determined whether or not an overcurrent error, such as an abnormal overcurrent flowing through the power supply device, has been detected. If it has been detected (yes), the process proceeds to step S62; otherwise, the process proceeds to step S63.

[0027] In step S62, it is determined whether the number of operations at the time the overcurrent error in step S61 was detected is less than or equal to a predetermined number X. If it is less than or equal to the predetermined number X (yes), the power supply to the commercial power supply device is cut off in accordance with the detection of the overcurrent error, resulting in an abnormal shutdown. If the number of operations is greater than the predetermined number X (no), the process proceeds to the next step S64. If the number of operations of the sheet curtain 12 after the error is cleared is less than or equal to a predetermined number (e.g., 30 to 50 times), the protection circuit 30 activates and stops operation at the time the overcurrent error is detected. If the number of operations of the sheet curtain 12 after the error is cleared is greater than the predetermined number (e.g., 30 to 50 times), the overcurrent error is considered a false detection, and the opening and closing operation continues at a slower speed than normal.

[0028] In step S63, it is determined whether or not a stop signal corresponding to the operation of the stop button 19B has been input. If a stop signal has been input (yes), the opening and closing operation is terminated and the opening and closing operation process of the seat curtain 12 is stopped normally. If there is no stop signal input (no), the process returns to step S61 and the opening and closing operation is continued. By continuing the opening and closing operation, the seat curtain 12 will stop normally at the upper or lower limit position.

[0029] In step S64, the operating speed of the sheet curtain 12 is reduced to 50% of the normal speed in response to a request for the protective function to operate, and the opening and closing operation continues, before proceeding to step S65. While the opening and closing operation is being performed at 50% of the normal speed, the abnormal lamp is flashed to warn the user, and the opening and closing operation continues. In step S65, it is determined whether a second request for the protection function to operate has been detected. If it has been detected (yes), the power supply to the commercial power supply unit is cut off in accordance with the request for the protection function to operate, resulting in an abnormal shutdown. If it has not been detected (no), the process proceeds to step S66. Since two consecutive overcurrent errors have been detected, an abnormal shutdown is performed immediately.

[0030] In step S66, it is determined whether or not a stop signal corresponding to the operation of the stop button 19B has been input. If a stop signal has been input (yes), the opening and closing operation is terminated and the opening and closing operation process of the seat curtain 12 is stopped normally. If there is no stop signal input (no), the process returns to step S65 and the operation speed is continued at 50% of the normal speed. By continuing the operation speed at 50% of the normal speed, the seat curtain 12 will stop normally at the upper or lower limit position. There is a possibility that the overcurrent error detection in step S61 was a false detection, and continuing the opening and closing operation improves user convenience.

[0031] The number of operations in this opening / closing process may be the number of opening operations, the number of closing operations, or the number of opening / closing operations combined. The number of closing operations may also be counted when the device stops normally at the upper or lower limit. The operation count register is reset after the error is cleared and incremented according to the number of operations.

[0032] Although not shown in the diagram, if a detection signal from the obstacle detection device 185 is detected during the opening and closing operation, the obstacle detection process is immediately executed. The obstacle detection process stops the downward movement of the sheet curtain 12, reverses and raises it, ends the upward movement, and the sheet curtain 12 stops normally at the upper limit position.

[0033] In the above-described embodiment, a sheet curtain that is extended in an up-and-down manner was used as an example, but the same method can be applied to shutter-like opening and closing members that are extended in a horizontal sliding manner or horizontally. Furthermore, the method can be applied to opening and closing devices such as shutters, overhead doors, window shutters, blinds, roller screens, banners, sliding doors, movable partitions, awnings, and waterproof panels. [Explanation of Symbols]

[0034] 10…Opening / closing mechanism 11… Shutter case 12...Seat Curtain 13, 14… Guide rails 15…winding shaft 16... Chain 17…motor 172...Position detection device 18...Control device 18a...Motor drive circuit 18b…CPU 18c…Memory 185... Obstacle detection device 19…Operation switch 19A... Up (Open) button 19B... Stop button 19C... Down (close) button 20...Power supply device 30…Protection circuit

Claims

1. An opening and closing mechanism provided on the periphery of the opening, An opening / closing mechanism for electrically operating the opening / closing means, A control means that drives the opening and closing mechanism and electrically controls the operation of the opening and closing means, A power supply device that supplies power based on commercial power to the control means, A switchgear device comprising a protective means for interrupting the supply of power from the commercial power source to the power supply device when an overcurrent error is detected from the commercial power source to the power supply device, A switchgear device characterized in that, when the first overcurrent error is detected, the switching means continues to operate at a slower speed than the normal operating speed, and when the second overcurrent error is detected while the switching means is operating at a slower speed than the normal operating speed, the supply of power from the commercial power source to the power supply device is immediately cut off.

2. A switchgear device according to claim 1, characterized in that if the number of operations of the switchgear after the error clearing of the protective means at the time when the overcurrent error is detected after the error clearing of the protective means is less than or equal to a predetermined number, the power supply of the commercial power to the power supply device is immediately cut off, and if the number of operations is greater than the predetermined number, the operating speed of the switchgear is continued at an operating speed slower than the normal operating speed.

3. An opening and closing mechanism provided on the periphery of the opening, An opening / closing mechanism for electrically operating the opening / closing means, A control means that drives the opening and closing mechanism and electrically controls the operation of the opening and closing means, A power supply device that supplies power based on commercial power to the control means, A switch control method comprising a protective means for interrupting the supply of power from the commercial power source to the power supply device when an overcurrent error is detected from the commercial power source to the power supply device, A switch control method characterized in that, when the first overcurrent error is detected, the operating speed of the switch means is kept slower than the normal operating speed, and when the second overcurrent error is detected while the operating speed of the switch means is slower than the normal operating speed, the power supply from the commercial power source to the power supply device is immediately cut off.

4. A method for controlling an open / closed body according to claim 3, characterized in that if the number of operations of the open / closed means after the error clearing of the protective means is detected at the time the overcurrent error is cleared is less than or equal to a predetermined number, the power supply of the commercial power to the power supply device is immediately cut off, and if the number of operations is greater than the predetermined number, the operating speed of the open / closed means is continued at an operating speed slower than the normal operating speed.

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