Opening / closing body device and control method for opening / closing body device

Abstract

To suppress reduction in operability while ensuring safety when there is a sign of an abnormality or an abnormality occurs, by using important history information of an opening / closing body apparatus.SOLUTION: An opening / closing body apparatus includes opening / closing means provided on a circumferential portion of an opening portion, an opening / closing machine for operating the opening / closing means electrically, control means that drives the opening / closing machine to control an operation of the opening / closing means electrically, and detection means that detects a load torque of the opening / closing machine to output a detection signal to the control means. The control means includes recording means for recording detection information of the load torque by the detection means as history information, and reduces an operation speed of the opening / closing means gradually according to a content of the history information recorded by the recording means. By reducing the operation speed of the opening / closing means when there is a sign of an abnormality or an abnormality occurs by using important history information of the opening / closing machine, a reduction of operability is suppressed compared with a case where a conventional driving operation is uniformly limited to a push-and-stop operation while securing safety.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an opening / closing body device 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, and a control method for the opening / closing body device. In particular, the present invention relates to an opening / closing body device and a control method for the opening / closing body device suitable for utilizing important history information of the opening / closing body device, such as abnormal fluctuations in the load torque of an opener that operates the opening / closing body electrically.

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 and 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 grill 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, an electrically operated opening / closing body device is configured to lift and lower an opening / closing body for lifting and closing an opening / closing space of a structure such as a building by an opener (such as a motor) arranged in the ceiling space or shutter case of the structure. And in such an electrically operated opening / closing body device, usually, in order to ensure safety, an obstacle sensing device for sensing an obstacle that exists in the opening and hinders the operation of the opening / closing body is provided, and when an obstacle sensing signal is generated from the obstacle sensing device, the operation of the opening / closing body during lowering is stopped.

[0004] Among such electric opening / closing body devices, some are configured to record the detection signal of an obstacle by an obstacle detection device as history information and display it on a display device as needed, due to the necessity of investigating the cause of problems during repairs and maintenance work in the event of a failure. For example, Patent Document 1 discloses an opening / closing device having a history display mode.

[0005] When it is determined from the history information that there are signs of abnormality or an abnormality has occurred, the driving operation is limited to a "forced operation" in which the driving operation can be performed only when the push button of the operation switch is continuously pressed, thereby improving safety and notifying the operator of the signs of abnormality and the occurrence of an abnormality. For example, Patent Document 2 discloses an opening / closing system control method employing a forced operation.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] The load torque of an opener (such as a motor) that operates an opening / closing body electrically increases rapidly, for example, when the ascending opening / closing body gets caught on something, and also increases gradually due to aging changes caused by long-term use. Therefore, when determining signs of abnormality or the occurrence of an abnormality in the opening / closing body device, it is necessary to consider abnormal fluctuations in the load torque of the opener as important history information. On the other hand, when it is determined that there are signs of abnormality or an abnormality has occurred, limiting the driving operation to a forced operation is not user-friendly for the operator. Also, it was necessary to consider the operation on the side of external connection devices such as the obstacle detection device, which triggers the limitation of the driving operation to a forced operation, in the design.

[0008] The present invention has been made in view of the above points, and uses important history information of an opening / closing body device to ensure safety and suppress a decrease in operability when there are signs of abnormality or when an abnormality occurs.

Means for Solving the Problem

[0009] The first feature of the opening / closing body device of the present invention includes opening / closing means provided at the peripheral edge of an opening, an opener for operating the opening / closing means electrically, control means for driving the opener to electrically control the operation of the opening / closing means, and detection means for detecting the load torque of the opener and outputting a detection signal to the control means. The control means has recording means for recording the detection information of the load torque by the detection means as history information, and the operation speed of the opening / closing means is gradually decreased according to the content of the history information recorded in the recording means.

[0010] The detection signal output from the detection means to the control means includes detection information indicating the value of the load torque of the opener. Since the control means records the detection information of the load torque by the detection means as history information in the recording means and gradually decreases the operation speed of the opening / closing means according to the content of the history information, when there are signs of abnormality or when an abnormality occurs, by using the history information to decrease the operation speed of the opening / closing means, safety is ensured and the decrease in operability is suppressed compared to the case where the conventional operation is uniformly limited to a push operation. In addition, since the operation speed of the opening / closing means decreases, the signs of abnormality and the occurrence of an abnormality are made known to the operator, and it becomes unnecessary to consider the operation on the side of an external connection device such as an obstacle detection device, which serves as a trigger for restricting the operation to a push operation, when designing.

[0011] The opening and closing means is composed of an opening and closing member such as a shutter curtain that electrically opens and closes and moves openings such as entrances and exits, window parts, or internal passageways and spaces in structures such as buildings like houses, buildings, factories, warehouses, and garages. When the opening and closing means is a shutter curtain, it is stored at the upper part which is one of the peripheral edges of the opening of a building or the like, and the shutter curtain descends through a lintel or the like to electrically open and close the opening. In addition to this, there are also cases where the opening and closing means is stored at the lower part of the opening and electrically opens and closes and moves in a rising manner, or the opening and closing means is stored at the side part and electrically moves in a sliding manner. Also, the opening and closing means includes those that can fully close the opening by closing and those that cannot fully close it.

[0012] The second feature of the opening and closing body device of the present invention is that, in the opening and closing body device described in the first feature, it is provided with an obstacle sensing device that senses an obstacle existing in the opening and outputs a sensing signal to the control means, and the control means records the sensing information of the obstacle by the obstacle sensing device as history information in the recording means, and according to the occurrence frequency of the history information recorded in the recording means, the operation speed of the opening and closing means is gradually decreased.

[0013] The sensing signal output from the obstacle sensing device to the control means includes sensing information indicating that an obstacle existing in the opening has been sensed. Since the control means records the sensing information of the obstacle by the obstacle sensing device as history information in the recording means and gradually decreases the operation speed of the opening and closing means according to the occurrence frequency of the history information, by using the history information, when there are signs of abnormality or when an abnormality occurs, by decreasing the operation speed of the opening and closing means, safety is ensured, and compared with the case of uniformly limiting the conventional operation to a forced operation, the decrease in operability is suppressed. Also, since the operation speed of the opening and closing means decreases, signs of abnormality and the occurrence of an abnormality are made known to the operator, and considering the operation of external connection devices such as the obstacle sensing device, which becomes a trigger for restricting the operation to a forced operation, there is no need to perform a design.

[0014] The third feature of the opening / closing body device of the present invention is that, in the opening / closing body device described in the first or second feature, a safety device is provided which detects over-winding or over-feeding of the opening / closing means and operates to output an operation signal to the control means, and the control means records the operation information of the safety device as history information in a recording means, and stepwise reduces the operating speed of the opening / closing means according to the occurrence frequency of the history information recorded in the recording means.

[0015] The operation signal output from the safety device to the control means includes operation information indicating that the safety device has operated. Since the control means records the operation information of the safety device as history information in the recording means and stepwise reduces the operating speed of the opening / closing means according to the occurrence frequency of the history information, by using the history information, when there are signs of abnormality or when an abnormality occurs, the operating speed of the opening / closing means is reduced, so that safety is ensured, and compared with the case where the conventional operation is uniformly limited to a push operation, the reduction in operability is suppressed. In addition, since the operating speed of the opening / closing means is reduced, signs of abnormality and the occurrence of an abnormality are made known to the operator, and it is no longer necessary to consider the operation of external connection devices such as an obstacle sensing device, which becomes a trigger for restricting the operation to a push operation, when designing.

[0016] The fourth feature of the opening / closing body device of the present invention is that, in the opening / closing body device described in the first, second, or third feature, the control means records the change in the operating speed of the opening / closing means as history information in the recording means, and includes an input device for the operator to input an instruction to display the history information recorded in the recording means, and a display device for displaying the history information recorded in the recording means, and the control means causes the display device to display the history information recorded in the recording means according to the instruction input to the input device. The operator can easily identify the cause of the problem from the history information such as the detection information of the load torque of the opening / closing machine, the sensing information of the obstacle, the operation information of the safety device, and the change in the operating speed of the opening / closing means displayed on the display device.

[0017] The first feature of the control method of the opening / closing body device of the present invention is a control method of an opening / closing body device including an opening / closing means provided at a peripheral edge of an opening, an opener for operating the opening / closing means electrically, a control means for driving the opener to electrically control the operation of the opening / closing means, and a detection means for detecting a load torque of the opener and outputting a detection signal to the control means. A recording means for recording the detection information of the load torque by the detection means as history information is provided in the control means, and the operation speed of the opening / closing means is gradually decreased by the control means according to the content of the history information recorded in the recording means. This is a control method of an opening / closing body device corresponding to the opening / closing body device described in the first feature.

[0018] The second feature of the control method of the opening / closing body device of the present invention is that in the control method of the opening / closing body device described in the first feature, an obstacle sensing device for sensing an obstacle present in the opening and outputting a sensing signal to the control means is provided, the sensing information of the obstacle by the obstacle sensing device is recorded in the recording means as history information, and the operation speed of the opening / closing means is gradually decreased by the control means according to the occurrence frequency of the history information recorded in the recording means. This is a control method of an opening / closing body device corresponding to the opening / closing body device described in the second feature.

[0019] The third feature of the control method of the opening / closing body device of the present invention is that in the control method of the opening / closing body device described in the first or second feature, a safety device for detecting and operating when the opening / closing means is over-wound or over-fed and outputting an operation signal to the control means is provided, the operation information of the safety device is recorded in the recording means as history information, and the operation speed of the opening / closing means is gradually decreased by the control means according to the occurrence frequency of the history information recorded in the recording means. This is a control method of an opening / closing body device corresponding to the opening / closing body device described in the third feature.

[0020] The fourth feature of the control method of the opening / closing body device of the present invention is that, in the control method of the opening / closing body device described in the first, second, or third feature, the change in the operating speed of the opening / closing means is recorded in the recording means as history information, and an input device for the operator to input an instruction to display the history information recorded in the recording means, and a display device for displaying the history information recorded in the recording means are provided, and the history information recorded in the recording means is displayed on the display device in response to the instruction input to the input device. This is a control method of an opening / closing body device corresponding to the opening / closing body device described in the fourth feature.

Effects of the Invention

[0021] According to the present invention, by using the important history information of the opening / closing body device, when there are signs of abnormality or an abnormality occurs, it is possible to ensure safety and suppress a decrease in operability.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0023] Hereinafter, a preferred embodiment of the opening / closing body device according to the present invention will be described with reference to the accompanying drawings. In this embodiment, as the opening / closing means, a shutter device including a shutter curtain that opens and closes vertically will be described as an example. FIG. 1 is a diagram showing a schematic configuration of a shutter device which is an opening / closing body device according to an embodiment of the present invention. In FIG. 1, the opening / closing body device 10 is a shutter device that opens and closes the opening of an entrance / exit vertically.

[0024] The opening / closing body device 10 is provided at the opening of a building and basically includes a shutter case 11, a shutter curtain 12, guide rails 13, 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 operation switch 19, a power supply device 20, a load torque detection device 30, a safety device 40, an input device 50, and a display device 60, etc.

[0025] Normally, the opening / closing body device 10 drives the motor 17, which is an opening / closing machine, according to the operation of the operation switch 19 for opening / closing control. Further, in this opening / closing body device 10, a release state in which the shutter curtain 12 is wound around the winding shaft 15 is held by a mechanical holding mechanism (not shown). When an emergency signal BS indicating the occurrence of a fire or the like is input to the control device 18 in this release state from the outside, the holding of the release state by the holding mechanism is released, and the shutter curtain 12 also has a function of automatically closing the opening by falling naturally under its own weight.

[0026] The guide rails 13, 14 are provided on both ends of the opening of the building so as to contact both ends of the shutter curtain 12, and are made of a metal member having a U-shaped guide groove spanning from the eaves portion to the floor surface or a member equivalent thereto. The shutter curtain 12 moves up and down along each guide groove of the guide rails 13, 14 to perform the opening / closing operation of the opening.

[0027] The take-up shaft 15 is rotatably provided on both ends of the shutter case 11, and winds up and winds back the shutter 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 take-up shaft 15. Therefore, the rotational driving force of the motor 17 is transmitted to the take-up shaft 15 side via the chain 16. When the motor 17 rotates, the take-up shaft 15 rotates via the chain 16, and the opening and closing operation of the shutter curtain 12 is controlled.

[0028] In this embodiment, a DC motor is used as the motor 17. 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 state of the shutter 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 rotational position of the motor 17 and the position at the opening of the leading end of the shutter curtain 12 on the closing side, etc., are obtained by the control device 18 through calculation based on the generation situation of this pulse.

[0029] The control device 18 is configured as a microcomputer, and electric power is supplied 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, etc., based on control signals corresponding to the operation states of the operation buttons on the operation switch 19, detection signals from the load torque detection device 30, detection signals from the obstacle detection device 185, operation signals from the safety device 40, and signals from the position detection device 172 provided on the motor 17.

[0030] 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 respective operations of opening, closing, and stopping, 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 type remote control device.

[0031] The emergency signal BS is a signal of a voltage of 24 [V] supplied from an external control room or the like in the event of an emergency such as a fire, and is input to a hazard prevention interlocking relay (not shown) in the control device 18. In addition to, or instead of, the input of the external emergency signal BS, 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 shutter curtain 12 moves up and down. This temperature sensor is composed of an automatic reset type high temperature bimetal thermostat of B contact, etc., whose normally closed contact is in the on state and the contact opens and becomes off 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.

[0032] The obstacle detection device 185 has a transmitter provided at the lower end (seat plate) of the shutter 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, and when the seat plate switch returns after the subsequent removal of the obstacle, it transmits a return signal. The detection signal output from the obstacle detection device 185 to the control device 18 includes detection information indicating that an obstacle exists in the opening. The transmission of signals 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 using a battery as a power source. Further, a seat plate switch that moves when an obstacle contacts the lower end of the shutter curtain 12 may be provided, and a configuration in which the tape switch provided along the height direction of the guide rails 13 and 14 is pressed by the moving force of the seat plate when an obstacle contacts, or a configuration in which a detection signal is output to the control device 18 from the tape switch in a wired manner may be adopted. In addition, a light receiving and transmitting sensor such as a photoelectric tube or an LED may be provided at the opening, and a configuration in which an obstacle is detected non-contact by image recognition or the like may be adopted.

[0033] The power supply device 20 inputs AC power from the power line AC of the commercial power supply, and supplies DC power obtained by converting the AC power into DC power to the control device 18. In the present embodiment, the power supply device 20 is installed outside the shutter case 11, but the power supply device 20 may be installed inside the shutter case 11.

[0034] The load torque detection device 30 detects the load torque of the motor 17 and outputs a detection signal to the control device 18. The detection signal output from the load torque detection device 30 to the control device 18 includes detection information indicating the value of the load torque of the motor 17. In the motor 17 which is a DC motor, since the load current and the load torque have a substantially proportional correlation, the load torque detection device 30 detects the load torque of the motor 17 by detecting the load current of the motor 17.

[0035] The safety device 40 is a contact-type mechanical detection device, and is usually provided inside the shutter case 11. It detects and operates when the shutter curtain 12 is wound up too much or sagging due to excessive feeding of the shutter curtain 12, and outputs an operation signal to the control device 18. The operation signal output from the safety device 40 to the control device 18 includes operation information indicating that the safety device 40 has operated. When the control device 18 receives an operation signal from the safety device 40, it stops the operation (ascending or descending) of the shutter curtain 12. Therefore, the safety device 40 also plays a role in preventing the shutter curtain 12 from falling. Note that an optical non-contact detection device may be used as the safety device 40.

[0036] FIG. 2 is a diagram for explaining the operations of the devices in the shutter device shown in FIG. 1. The control device 18 controls the motor 17 based on the respective signals from the operation switch 19, the load torque detection device 30, the obstacle detection device 185, the safety device 40, and the position detection device 172, as well as the emergency signal BS, by the electric power supplied from the power supply device 20. Note that in FIG. 2, the connection relationship of the commercial power supply to devices other than the control device 18 is not shown.

[0037] FIG. 3 is a diagram showing the circuit configuration of the control device of the shutter device according to an embodiment of the present invention. The control device 18 of the present embodiment includes a motor drive circuit 18a, a CPU 18b, a memory 18c, and the like. The motor drive circuit 18a consists of an IPM (Intelligent Power Module: semiconductor element for high-performance power) driver or the like, and outputs the DC power supplied from the power supply device 20 to the control device 18 to the motor 17 under the control of the CPU 18b to drive the motor 17.

[0038] The CPU 18b controls the driving of the motor 17 by the motor drive circuit 18a. At this time, the CPU 18b changes the operation speed of the shutter curtain 12 by varying the voltage of the DC power applied from the motor drive circuit 18a to the motor 17 to control the rotation speed of the motor 17. Further, the CPU 18b records, as history information, the detection information of the load torque of the motor 17 included in the detection signal of the load torque detection device 30, the detection information of the obstacle included in the detection signal of the obstacle detection device 185, and the operation information of the safety device 40 included in the operation signal of the safety device 40 in the memory 18c. Then, based on each piece of history information recorded in the memory 18c, the CPU 18b changes the operation speed of the shutter curtain 12 as described below with reference to FIGS. 4, 5, and 6.

[0039] FIG. 4 is a flowchart showing an example of an operation of changing the operation speed of the shutter curtain according to the load torque of the motor. First, the CPU 18b determines whether or not the load torque exceeds 170% of a predetermined value from the detection information of the load torque recorded in the memory 18c (step 401). If the load torque exceeds 170% of the predetermined value, the CPU 18b sets the operation of the shutter curtain 12 to be restricted to a cut-off operation (step 402). Then, the CPU 18b records in the memory 18c, as history information, the fact that the operation of the shutter curtain 12 has been restricted to the cut-off operation together with the execution date and time, and returns to the beginning of the flow.

[0040] In step 401, if the load torque does not exceed 170% of the predetermined value, the CPU 18b determines whether or not the load torque exceeds 150% of the predetermined value (step 403). If the load torque exceeds 150% of the predetermined value, the CPU 18b sets the operation speed of the shutter curtain 12 to be reduced by 50% (step 404). Then, the CPU 18b records in the memory 18c, as history information, the fact that the operation speed of the shutter curtain 12 has been reduced by 50% together with the execution date and time, and returns to the beginning of the flow.

[0041] In step 403, when the load torque does not exceed 150% of a predetermined value, the CPU 18b determines whether the load torque exceeds 130% of the predetermined value (step 405). When the load torque exceeds 130% of the predetermined value, the CPU 18b sets the operating speed of the shutter curtain 12 to be reduced by 30% (step 406). Then, the CPU 18b records in the memory 18c, together with the execution date and time, that the operating speed of the shutter curtain 12 has been reduced by 30% as history information, and returns to the beginning of the flow.

[0042] In step 405, when the load torque does not exceed 130% of the predetermined value, the CPU 18b determines whether it was operating in a state where the operation of the shutter curtain 12 was restricted to a cut-off operation in step 402 before, or whether it was operating in a state where the operating speed of the shutter curtain 12 was reduced in step 404 or 406 before (step 407). If the shutter curtain 12 is operating with normal operation and normal operating speed, the operating speed is not changed.

[0043] When the CPU 18b is operating in a state where the operation of the shutter curtain 12 is restricted to a cut-off operation, it releases the restriction on the cut-off operation of the shutter curtain 12, or when it is operating in a state where the operating speed of the shutter curtain 12 is reduced, it releases the reduction in the operating speed of the shutter curtain 12 (step 408). Then, the CPU 18b records in the memory 18c, together with the execution date and time, that the reduction in the operating speed of the shutter curtain 12 has been released as history information, and returns to the beginning of the flow.

[0044] According to the example shown in FIG. 4, the control device 18 records the detection information of the load torque by the load torque detection device 30 as history information in the memory 18c, and gradually reduces the operating speed of the shutter curtain 12 according to the content of the history information. Therefore, by using the history information, when there are signs of abnormality or an abnormality occurs, the operating speed of the shutter curtain 12 is reduced, ensuring safety. Compared with the case where the conventional operation is uniformly limited to the push-cut operation, the reduction in operability is suppressed. In addition, when the operating speed of the shutter curtain 12 decreases, signs of abnormality and the occurrence of an abnormality are made known to the operator.

[0045] Note that the determination value of the load torque such as 170%, 150%, or 130% of a predetermined value, and the rate of reducing the operating speed of the shutter curtain 12 are not limited to the example of FIG. 4 and can be set as appropriate. In addition, the operating speed of the shutter curtain 12 is not limited to two steps and may be reduced in one step or three or more steps.

[0046] FIG. 5 is a flowchart showing an example of an operation of changing the operating speed of the shutter curtain according to the occurrence frequency of the detection signal of the obstacle detection device. The CPU 18b first determines whether a detection signal of the obstacle detection device 185 has newly occurred (step 501). When the detection signal has not newly occurred, step 501 is repeated until the detection signal newly occurs.

[0047] When the detection signal newly occurs, the CPU 18b stops the descending shutter curtain 12 and maintains the stopped state of the shutter curtain 12 as it is, or raises the shutter curtain 12 to the upper limit position and then stops it, and maintains the stopped state of the shutter curtain 12 at the upper limit position. Then, the CPU 18b records the detection information of the generated detection signal as history information together with its generation date and time in the memory 18c. The CPU 18b that records the sensed information as history information in the memory 18c determines whether the current sensed information is within a predetermined period T1 from the previously recorded sensed information (step 502). If the current sensed information is within a predetermined period T1 from the previously recorded sensed information, the CPU 18b sets the operating speed of the shutter curtain 12 to be reduced by 60% (step 503). Then, the CPU 18b records in the memory 18c, as history information, the fact that the operating speed of the shutter curtain 12 has been reduced by 60% together with the execution date and time, and then releases the maintenance of the stopped state of the shutter curtain 12 according to a predetermined stop release condition and returns to step 501.

[0048] In step 502, if the current sensed information is not within a predetermined period T1 from the previously recorded sensed information, the CPU 18b does not change the operating speed of the shutter curtain 12, releases the maintenance of the stopped state of the shutter curtain 12 according to a predetermined stop release condition, and returns to step 501.

[0049] In step 503, after setting the operating speed of the shutter curtain 12 to be reduced by 60%, the CPU 18b determines whether the period during which the operating speed of the shutter curtain 12 has been reduced has reached a predetermined release time R1 (A → step 504). When the period during which the operating speed of the shutter curtain 12 has been reduced has not reached the predetermined release time R1, step 504 is repeated until the release time R1 is reached. When the period during which the operating speed of the shutter curtain 12 has been reduced has reached the predetermined release time R1, the CPU 18b releases the reduction of the operating speed of the shutter curtain 12 (step 505). Then, the CPU 18b records in the memory 18c, as history information, the fact that the reduction of the operating speed of the shutter curtain 12 has been released together with the execution date and time, and returns to step 501.

[0050] In addition, a manual release switch for instructing the release of the decrease in the operating speed may be provided. In step 504, instead of determining whether the release time R1 has been reached, or in addition to determining whether the release time R1 has been reached, it may be determined whether the release switch has been operated, and the decrease in the operating speed may be released (step 505).

[0051] According to the example shown in FIG. 5, the control device 18 records the obstacle detection information by the obstacle detection device 185 as history information in the memory 18c, and gradually decreases the operating speed of the shutter curtain 12 according to the occurrence frequency of the history information. Therefore, by using the history information, when there are signs of abnormality or an abnormality occurs, the operating speed of the shutter curtain 12 is decreased to ensure safety, and compared with the case where the conventional operation is uniformly limited to the push operation, the decrease in operability is suppressed. In addition, when the operating speed of the shutter curtain 12 decreases, signs of abnormality or the occurrence of an abnormality are made known to the operator.

[0052] Note that the ratio of decreasing the operating speed of the shutter curtain 12 is not limited to the example of FIG. 5 and can be set as appropriate. In addition, the operating speed of the shutter curtain 12 is not limited to one step, and may be decreased in two or more steps.

[0053] FIG. 6 is a flowchart showing an example of an operation of changing the operating speed of a shutter curtain according to the occurrence frequency of an operation signal of a safety device. The CPU 18b first determines whether a new operation signal of the safety device 40 has occurred (step 601). When a new operation signal has not occurred, step 601 is repeated until a new operation signal occurs.

[0054] When a new operation signal has occurred, the CPU 18b stops the operation (ascending or descending) of the shutter curtain 12 and maintains the stopped state. Then, the CPU 18b records the operation information of the generated operation signal as history information together with its generation date and time in the memory 18c. The CPU 18b that records the operation information as history information in the memory 18c determines whether the current operation information is within a predetermined period T2 from the operation information recorded immediately before (step 602). If the current operation information is within the predetermined period T2 from the operation information recorded immediately before, the CPU 18b performs a setting to reduce the operation speed of the shutter curtain 12 by 70% (step 603). Then, the CPU 18b records in the memory 18c, as history information, that the operation speed of the shutter curtain 12 has been reduced by 70% together with the execution date and time thereof. After that, in accordance with a predetermined stop release condition, the CPU 18b releases the maintenance of the stopped state of the shutter curtain 12 and returns to step 601.

[0055] In step 602, if the current operation information is not within the predetermined period T2 from the operation information recorded immediately before, the CPU 18b does not change the operation speed of the shutter curtain 12, releases the maintenance of the stopped state of the shutter curtain 12 in accordance with a predetermined stop release condition, and returns to step 601.

[0056] Note that the predetermined period T2 used in step 602 may be the same length as the predetermined period T1 used in step 502 of FIG. 5, or may be of a different length.

[0057] In step 603, after performing the setting to reduce the operation speed of the shutter curtain 12 by 70%, the CPU 18b determines whether the period during which the operation speed of the shutter curtain 12 is reduced has reached a predetermined release time R2 (B → step 604). When the period during which the operation speed of the shutter curtain 12 is reduced has not reached the predetermined release time R2, step 604 is repeated until the release time R2 is reached. When the period during which the operating speed of the shutter curtain 12 is decreased reaches a predetermined release time R2, the CPU 18b releases the decrease in the operating speed of the shutter curtain 12 (step 605). Then, the CPU 18b records in the memory 18c, as history information, the fact that the decrease in the operating speed of the shutter curtain 12 has been released, together with the date and time of its execution, and returns to step 601.

[0058] Note that the predetermined release time R2 used in step 604 may be the same length as the release time R1 used in step 504 of FIG. 5, or may be of a different length.

[0059] Also, a manual release switch for instructing the release of the decrease in the operating speed may be provided, and in step 604, instead of or in addition to determining whether the release time R2 has been reached, it may be determined whether the release switch has been operated, and the decrease in the operating speed may be released (step 605).

[0060] According to the example shown in FIG. 6, since the control device 18 records the operation information of the safety device 40 as history information in the memory 18c and gradually decreases the operating speed of the shutter curtain 12 according to the occurrence frequency of the history information, by using the history information, when there are signs of abnormality or an abnormality occurs, the operating speed of the shutter curtain 12 is decreased, so that safety is ensured, and compared with the case where the conventional operation is uniformly limited to the push operation, the decrease in operability is suppressed. In addition, since the operating speed of the shutter curtain 12 is decreased, signs of abnormality and the occurrence of an abnormality are made known to the operator.

[0061] Note that the rate at which the operating speed of the shutter curtain 12 is decreased is not limited to the example of FIG. 6 and can be set as appropriate. Also, the operating speed of the shutter curtain 12 is not limited to one step and may be decreased in two or more steps.

[0062] In FIG. 3, the input device 50 is composed of, for example, a keyboard, a touch panel, etc., and inputs an instruction to display the history information recorded in the memory 18c by the operation of the operator. The display device 60 is composed of, for example, a liquid crystal display device, etc., and displays the history information recorded in the memory 18c. The CPU 18b causes the display device 60 to display the history information recorded in the memory 18c according to the instruction input to the input device 50. The operator can easily identify the cause of the problem from the history information such as the detected information of the load torque of the motor 17, the detected information of the obstacle, the operation information of the safety device 40, and the change in the operation speed of the shutter curtain 12 displayed on the display device 60.

[0063] In the embodiment described above, a DC motor is used as the motor 17, and the applied voltage of the motor 17 is made variable to change the operation speed of the shutter curtain 12. However, an AC motor may be used as the motor 17, and the frequency of the AC power applied to the motor 17 may be made variable by an inverter device or the like to change the operation speed of the shutter curtain 12. At that time, in a general AC motor, since the load torque and the load rotation speed have a proportional correlation, the load torque of the motor 17 can be detected by detecting the load rotation speed of the motor 17.

[0064] The opening and closing body device of the present invention can also be applied to, for example, a shutter device, a window shutter device, a blind device, a roller screen device, a curtain device, a movable partition device, a sliding door device, a hinged door device, a folding door device, a door leaf device, an awning device, a waterproof board device, etc.

Explanation of Signs

[0065] 10... Opening and closing body device 11... Shutter case 12... Shutter curtain 13, 14... Guide rail 15... Take-up 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…Rise (open) button 19B…Stop (pause) button 19C…Fall (close) button 20…Power supply device 30…Load torque detection device 40…Safety device 50…Input device 60…Display device

Claims

1. Opening and closing means provided at the peripheral edge of the opening, An opening and closing machine for operating the opening and closing means electrically, Control means for driving the opening and closing machine to electrically control the operation of the opening and closing means, An operation switch for performing an operation of the opening and closing means on the control means, Detection means for detecting the load torque of the opening and closing machine and outputting a detection signal to the control means, A safety device that detects and operates when the opening and closing means is overwound or overextended and outputs an operation signal to the control means, The control means has a recording means for recording the detection information of the load torque by the detection means as history information, and according to the content of the history information recorded in the recording means, a plurality of predetermined values are used as determination values of the load torque in advance, and the operation speed of the opening and closing means is gradually reduced. When the load torque exceeds the largest determination value from the detection information of the load torque recorded as the history information, the operation of the opening and closing means by the operation switch is restricted to a forced operation, and the operation information of the safety device is recorded as history information in the recording means. According to the occurrence frequency of the history information recorded in the recording means, the operation speed of the opening and closing means is gradually reduced. An opening and closing body device characterized by this.

2. Opening and closing means provided at the peripheral edge of the opening, An opening and closing machine for operating the opening and closing means electrically, Control means for driving the opening and closing machine to electrically control the operation of the opening and closing means, An operation switch for performing an operation of the opening and closing means on the control means, A control method for an opening and closing body device including detection means for detecting the load torque of the opening and closing machine and outputting a detection signal to the control means, The control means is provided with a recording means for recording the detection information of the load torque by the detection means as history information. According to the content of the history information recorded in the recording means, the control means uses a plurality of predetermined values as determination values of the load torque in advance, and gradually reduces the operation speed of the opening and closing means. When the load torque exceeds the largest determination value from the detection information of the load torque recorded as the history information, the operation of the opening and closing means by the operation switch is restricted to a forced operation, In addition, a safety device that detects and operates when the opening and closing means is overwound or overextended and outputs an operation signal to the control means is provided, A control method for an opening / closing body device, characterized in that operation information of the safety device is recorded as history information in the recording means, and the operation speed of the opening / closing means is gradually decreased by the control means according to the occurrence frequency of the history information recorded in the recording means.

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