JP2015083773A - Shutter obstacle detection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shutter obstacle detection system capable of enhancing reliability of a harm prevention function of a shutter.SOLUTION: A shutter obstacle detection system 30 which detects an obstacle to a shutter curtain 12 opening and closing an opening section 1 comprises: an obstacle sensor which detects existence of the obstacle blocking closing operation of the shutter curtain 12 at the opening section 1; closing operation identification means which identifies that the closing operation of the shutter curtain 12 is started up; a transmitter 32 which has a first transmission section wirelessly transmitting an obstacle detection state signal including information indicating an obstacle detection state by the obstacle sensor; and a receiver 33 which has a second receiving section wirelessly receiving the obstacle detection state signal. The first transmission section starts transmitting the obstacle detection state signal when the closing operation identification means identifies that the closing operation of the shutter curtain 12 is started up.

Description

  The present invention relates to a shutter obstacle detection system that detects an obstacle to a shutter curtain that opens and closes an opening.

  Conventionally, an electric fire / smoke shutter device that forms a fire / smoke-proof section in this building by fully closing the openings provided in various buildings in the event of a fire has spread. . FIG. 11 is a diagram conceptually showing such a conventional shutter device 100 and a fire notification system 110 that cooperates with the shutter device. The shutter device 100 is generally configured to include a shutter curtain 101, an opening / closing device 102, an automatic closing device 103, a manual closing device 104, and an interlocking relay 105. On the other hand, the fire alarm system 110 includes a fire detector 111 and a disaster prevention panel 112. In a normal state, when the user operates the manual closing device 104, the opening / closing machine 102 rotates a winding shaft (not shown) around which the shutter curtain 101 is wound, and the shutter curtain 101 is raised or lowered electrically. . Further, when a fire is detected by the fire detector 111, a fire detection signal is output from the fire detector 111 to the disaster prevention panel 112, and a transfer signal is output from the disaster prevention panel 112 to the interlocking relay 105. Then, the automatic closing device 103 releases the brake of the switch 102 based on the control signal from the interlock repeater 105, so that the shutter curtain wound around the take-up shaft is lowered by its own weight, and the fire-proof / smoke-proof section. Form.

  Further, the shutter device 100 is provided with an obstacle detection device (hazard prevention device) 120. The obstacle detection device 120 stops the descent of the shutter curtain 101 when the shutter curtain 101 comes into contact with an obstacle when the shutter curtain 101 is lowered by electric or dead weight to close the opening. This is to prevent harming the obstacle. The obstacle detection device 120 is generally configured to include a seat plate switch 121, a signal line 122, and a cord reel 123. The seat plate switch 121 detects that the seat plate 106 provided at the lower end portion of the shutter curtain 101 is in contact with an obstacle, and outputs a detection signal when the contact is detected. The signal line 122 is a line that connects the seat plate switch 121 and the interlock repeater 105 so that wired communication is possible. When the interlock repeater 105 receives the detection signal of the seat switch 121 via the signal line 122 while the shutter curtain 101 is descending, it outputs a control signal to the switch 102 to operate the brake. Then, the descent of the shutter curtain 101 is stopped. The cord reel 123 winds the signal line 122 so that the unwinding length of the signal line 122 is always maintained at an appropriate length even when the seat switch 121 moves up and down as the shutter curtain 101 is opened and closed. Taking up or unwinding is performed (for example, refer to Patent Document 1).

  Or the obstacle detection apparatus which abbreviate | omitted the signal line is proposed conventionally. This obstacle detection device is generally configured to include an optical transmitter and an optical receiver, and the optical transmitter is provided at the lower end portion of the shutter curtain, and is a shutter device 100 that accommodates the shutter curtain. An optical receiver connected to the interlocking repeater and the signal line is provided at a position above, and performs infrared communication from the optical transmitter to the optical receiver. And when the lower end of the shutter curtain is in contact with an obstacle, the control signal is output to the switch by transmitting the detection signal from the optical transmitter to the optical receiver using infrared rays. Is operated to stop the descent of the shutter curtain (see, for example, Patent Document 2).

JP 2006-233608 A JP 2007-327225 A

  However, a conventional obstacle detection device using a signal line may not function normally if the signal line is disconnected due to mischief. Further, in the conventional obstacle detection device using the signal line, a high degree of mounting accuracy is required when the seat plate switch 121, the signal line 122, and the cord reel 123 are installed in the shutter device. In addition, there is a possibility that the appearance of the shutter device may be impaired because the cord reel and signal line are exposed, and there is no space for installing the cord reel when retrofitting to an existing shutter that does not have an obstacle detection device. There was a problem that it could not be installed.

  On the other hand, the conventional obstacle detection device that performs infrared communication from the optical transmitter to the optical receiver can solve the conventional problem caused by the signal line, but the optical communication has a problem. It may stop functioning properly. For example, if dust or dirt adheres to the light transmission window of the optical transmitter, or if the light transmission window is blocked by mischief, optical communication with the optical receiver becomes impossible. May contact the obstacle, the optical receiver may not receive light even if the optical transmitter transmits a detection signal, and the shutter curtain may not be able to stop descending.

  In view of the above-described problems of the prior art, the inventor of the present application paid attention to transmitting and receiving information on the obstacle detection state when the shutter curtain is lowered by radio waves. According to such transmission / reception, problems caused by signal lines and cord reels can be solved, and problems caused by optical devices can also be solved. However, on the other hand, new problems may arise. In other words, if an obstacle is detected when the shutter curtain is lowered, it is necessary to stop the shutter curtain from falling within a prescribed distance stipulated by law, but it takes time to establish communication for transmission and reception. Therefore, there is a possibility that the descent of the shutter curtain cannot be stopped by completing transmission / reception within a predetermined distance.

  The present invention is intended to solve the above-described problems in the prior art, and by making it possible to quickly perform wireless transmission / reception, it is possible to improve the reliability of shutter obstacle detection than before. An object of the present invention is to provide a shutter obstacle detection system that can be used.

  In order to solve the above-described problems and achieve the object, the shutter obstacle detection system according to claim 1 is a shutter obstacle detection system that detects an obstacle with respect to a shutter curtain that opens and closes an opening. An obstacle sensor that detects that an obstacle that obstructs the closing operation of the shutter curtain is present in the opening, a closing operation specifying means that specifies that the closing operation of the shutter curtain is started, and the obstacle A first communication means having a first transmitter for wirelessly transmitting an obstacle detection state signal including information indicating an obstacle detection state by an obstacle sensor; and a first communication means for wirelessly receiving the obstacle detection state signal. A second communication unit having two reception units; and a control unit that performs opening / closing control of the shutter curtain based on a signal received by the second communication unit. The first transmission unit starts transmission of the obstacle detection state signal when the closing operation specifying unit determines that the closing operation of the shutter curtain is activated. .

According to the shutter obstacle detection system according to claim 1, since information related to the obstacle detection state when the shutter curtain is lowered can be transmitted by wireless communication having no directivity, a conventional signal line or cord reel can be transmitted. It is possible to solve problems caused by optical communication and to improve the reliability and aesthetics of the shutter device.
In particular, since the obstacle detection status signal is transmitted, it is not necessary to pause or stop the obstacle detection status signal, and wireless transmission / reception can be performed more quickly. Reliability can be further increased.
In addition, when it is determined that the shutter curtain closing operation has been activated, an obstacle detection status signal is transmitted, so that an obstacle is detected, such as when transmission of a signal is started after an obstacle is detected. Since it is no longer necessary to establish communication or start carrier sense after an object is detected, it is possible to reduce the time until an obstacle detection status signal is transmitted after an obstacle is detected, and to quickly communicate the obstacle detection result. The safety of the shutter device can be improved.

1 is a front view conceptually showing a shutter device, a fire alarm system, and a shutter obstacle detection system according to an embodiment of the present invention. It is a block diagram which shows the electric constitution of a transmitter. It is a block diagram which shows the electric constitution of a receiver. It is a flowchart of a registration process. It is a flowchart of a regular report process. It is a flowchart of an obstacle detection process. It is a flowchart of the obstacle detection process following FIG. It is a flowchart of descent stop processing. It is a flowchart of descent resumption processing. FIG. 10 is a flowchart of the descent restart process following FIG. 9. FIG. It is a front view which shows notionally the conventional shutter apparatus, a fire alerting | reporting system, and an obstruction detection apparatus.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. However, the present invention is not limited by this embodiment.

(Overview)
First, an outline of the shutter obstacle detection system according to the present embodiment will be described. This shutter obstacle detection system is a system that detects an obstacle to a shutter curtain that opens and closes an opening. The shutter device provided with the shutter curtain can take any purpose, installation location, structure, etc., unless otherwise specified, and is configured as, for example, a heavy shutter, a lightweight shutter, a grill shutter, or a smoke proof wall, The heavy shutter is configured as a fire shutter, smoke shutter, airtight shutter, management shutter, or soundproof shutter. The opening / closing direction of the shutter curtain is also arbitrary, and includes the vertical direction and the horizontal direction. Below, the example which applied the shutter obstruction detection system to the shutter apparatus for fire prevention and smoke prevention which opens and closes a shutter curtain along a perpendicular direction is demonstrated.

  “Detecting obstacles” means detecting people and objects that can be an obstacle to the shutter curtain that opens and closes the opening. Including obstacle detection for, but not limited to harm prevention, it can target obstacle detection based on any purpose or law. Below, the example which comprised the shutter obstacle detection system as a hazard prevention system aiming at the hazard prevention at the time of the fall of a fire prevention shutter apparatus is demonstrated.

(Configuration-Shutter device)
Next, the configuration of a shutter device to which the shutter obstacle detection system according to the present embodiment is applied will be described. However, the shutter device can be configured in the same manner as in the prior art, and the configuration and processing not specifically mentioned are the same as in the prior art. FIG. 1 is a front view conceptually showing the shutter device 10, the fire alarm system 20, and the shutter obstacle detection system 30 according to the present embodiment.

  This shutter device 10 is an electric fire-proof shutter device that forms a fire-proof section in this building by fully closing the opening 1 provided in the building when a fire breaks out. The shutter curtain 12, the opening / closing device 13, the automatic closing device 14, the manual closing device 15, and the interlocking relay 16 are configured. In the following description, the X direction in FIG. 1 is referred to as the width direction, the Y direction is referred to as the height direction (the + Y direction is upward, the −Y direction is downward), and the direction orthogonal to the X direction and the Y direction is referred to as the front-rear direction. .

  The shutter accommodating portion 11 is a hollow body for accommodating each portion of the shutter device 10, and is attached to a position near the upper end of the opening portion 1. Inside the shutter housing portion 11 are housed an opening / closing machine 13, an automatic closing device 14, an interlocking relay 16, a winding shaft (not shown), and a receiver 33 described later of the shutter obstacle detection system 30. Further, in a state where the shutter curtain 12 is wound around the winding shaft, the shutter curtain 12 is also housed inside the shutter housing portion 11 together with a transmitter 32 described later of the shutter obstacle detection system 30. A slit (not shown) is formed on the lower surface of the shutter storage portion 11 over the entire length in the opening width direction, and the shutter curtain 12 is taken in and out through this slit.

  The shutter curtain 12 is shielding means that brings the opening 1 into a fully open state, a fully closed state, or a state between these two states by being wound or unwound by a winding shaft. Both end portions of the shutter curtain 12 in the width direction are inserted into guide rails 2 provided along the vertical direction at the left and right inner edges of the opening 1, and the inside of the guide rail 2 can be slid in the vertical direction. In addition, the front and rear direction is restricted so as not to drop out of the guide rail 2. A horizontal seat plate 17 is provided at the lower end of the shutter curtain 12, and a seat plate switch 31 described later of the shutter obstacle detection system 30 is attached to the seat plate 17.

  The opening / closing machine 13 is an elevating unit that electrically lifts and lowers the shutter curtain 12 by rotationally driving the winding shaft, and includes a brake (not shown) that brakes the rotation of the winding shaft. The automatic closing device 14 is a means for controlling the lowering of the weight of the shutter curtain 12, and based on a control signal from the interlocking relay 16, the brake is released by pulling the brake lever of the opening / closing device 13, thereby releasing the shutter curtain. The self-weight drop of the shutter curtain 12 is stopped by lowering the weight of the shutter curtain 12 or operating the brake by returning the brake lever of the switch 13 based on the control signal from the interlocking relay 16.

When the shutter curtain 12 is lifted and lowered electrically, the automatic closing device 14 does not operate, and the opening / closing device 13 releases the brake by itself and drives the winding shaft in a predetermined winding direction or feeding direction to thereby release the shutter. The curtain 12 is raised or lowered electrically to fully open or close the opening 1.
On the other hand, by releasing the brake by the automatic closing device 14, the shutter curtain 12 is lowered by its own weight so that the opening 1 is fully closed, or the brake is operated to brake the rotation of the winding shaft, thereby releasing the shutter. The descent of the curtain 12 is stopped.

The manual closing device 15 is an operating means for operating the shutter curtain 12, and includes a lift button for electrically raising the shutter curtain 12, a lower button for electrically lowering, and a stop button for stopping the shutter curtain 12 being lifted and lowered. When the up button, the down button, or the stop button is pressed by the user, an operation signal corresponding to the pressed button is output to the interlocking relay 16 so that the shutter curtain 12 is electrically driven via the switch 13. Ascend and descend, or stop raising and lowering the shutter curtain 12.
Further, the manual closing device 15 has an emergency closing button. By pressing the emergency closing button, the shutter curtain 12 starts its own weight drop as in the case of a fire that will be described later.

  The interlock repeater 16 is a control means for interlocking each part of the shutter device 10 and is a relay means for interlocking the fire alarm system 20 with the shutter device 10. The interlock repeater 16 is electrically connected to a switchboard 13, an automatic closing device 14, a manual closing device 15, a disaster prevention panel 22 to be described later of the fire alarm system 20, and a receiver 33 to be described later of the shutter obstacle detection system 30. Connected. In particular, the interlock repeater 16 outputs a control signal to the automatic closing device 14 so as to lower the weight of the shutter curtain 12 or stop the weight of the shutter curtain 12 from dropping. Further, when the control signal is output to the automatic closing device 14 in this way, the interlock repeater 16 outputs a signal corresponding to the control content to the receiver 33. Hereinafter, among the outputs from the interlock repeater 16 to the receiver 33, a signal indicating that the weight drop of the shutter curtain 12 is activated is referred to as “activation on signal (corresponding to the activation signal in the claims)”, A signal indicating that the weight drop of the shutter curtain 12 has been stopped is referred to as a “start-off signal”.

  In addition, the shutter housing portion 11 of the shutter device 10 is provided with a lower limit switch (not shown). In this lower limit switch, the lower end of the shutter curtain 12 is positioned on either the upper side or the lower side with respect to a predetermined position (hereinafter referred to as a lower limit position) set at a predetermined distance (several centimeters) above the floor surface. It is a switch for detecting whether or not The lower limit switch includes, for example, a potentiometer that detects the rotation amount of the winding shaft of the shutter curtain 12, and the lower limit is set when the lower end of the shutter curtain 12 is located below the lower limit position. The limit signal is output to the interlocking relay 16.

(Configuration-Fire alarm system)
Next, the structure of the fire alarm system 20 linked with the shutter obstacle detection system 30 according to the present embodiment will be described. However, the fire alarm system 20 can be configured in the same manner as in the prior art, and the configuration and processing that are not specified are the same as in the prior art. The fire notification system 20 is a system that detects and notifies the occurrence of a fire in a monitoring area set in a building, and includes a fire detector 21 and a disaster prevention panel 22. The fire detector 21 outputs a fire detection signal to the disaster prevention panel 22 when a fire occurrence in the monitoring area is detected. When the fire prevention signal is received from the fire detector 21, the disaster prevention panel 22 outputs an alarm sound and turns on the fire indicator light, and fully closes the shutter curtain 12 to form a fire prevention zone to spread the fire. In order to prevent expansion, a transfer signal for notifying the occurrence of a fire is output to the interlocking repeater 16.

(Configuration-Shutter obstacle detection system)
Next, the configuration of the shutter obstacle detection system 30 according to the present embodiment will be described. The shutter obstacle detection system 30 is a system that detects an obstacle to the shutter curtain 12 that opens and closes the opening 1 as described above. The shutter obstacle detection system 30 includes a seat plate switch 31, a transmitter 32, and a receiver 33. As will be described later, the transmitter 32 is a communication unit that performs both transmission and reception of signals, but in the present embodiment, for convenience of explanation, the transmitter 32 is referred to as a “transmitter”. Further, as will be described later, the receiver 33 is a communication unit that performs both transmission and reception of signals, but in this embodiment, for convenience of explanation, the receiver 33 is referred to as a “receiver”.

(Configuration-Shutter obstacle detection system-Seat switch)
The seat plate switch 31 is an obstacle sensor that detects that the tip portion (the seat plate 17 in the present embodiment) at the time of the closing operation of the shutter curtain 12 has come into contact with the obstacle. The seat plate switch 31 is configured, for example, in the same manner as in the prior art. When the shutter curtain 12 is closed, the seat plate 17 comes into contact with an obstacle and is lifted up relative to the shutter curtain 12. The displacement is detected mechanically (such as a micro switch), and an output corresponding to the detection result is performed. Hereinafter, of the outputs from the seat plate switch 31, the output when no obstacle is detected is referred to as “seat plate switch-off output”, and the output when an obstacle is detected is referred to as “seat plate switch-on output”. However, any detection means for detecting an obstacle can be used in place of the seat plate switch 31. For example, an ultrasonic sensor, a capacitance sensor, or an optical sensor can be used rather than the lower end of the shutter curtain 12. It may be detected that there is an obstacle below.

(Configuration-Shutter obstacle detection system-Transmitter)
The transmitter 32 is a first communication unit that wirelessly transmits a signal (hereinafter referred to as an obstacle detection state signal) including information indicating an obstacle detection state by the obstacle sensor. FIG. 2 is a block diagram showing an electrical configuration of the transmitter 32. The transmitter 32 includes a vibration sensor 32a, an input unit 32b, a display unit 32c, a registration switch 32d, a first transmission unit 32e, a first reception unit 32f, an antenna 32g, a storage unit 32h, a power supply unit 32i, and a control unit 32j. They are connected as shown in the figure.

The vibration sensor 32 a is a second specifying unit that specifies that the closing operation of the shutter curtain 12 is activated based on the mechanical operation of the shutter curtain 12. Specifically, the vibration sensor 32a is a vibration detection unit that detects vibration, and is fixed to the shutter curtain 12 and outputs a vibration detection signal when mechanical vibration of the shutter curtain 12 is detected. Although the specific configuration of the vibration sensor 32a is arbitrary, for example, a piezoelectric acceleration sensor can be used. However, as the second specifying means, means other than the vibration sensor 32a may be used. For example, a magnet sensor or a capacitive sensor that detects that the shutter curtain 12 is mechanically displaced, or a guide rail is used. A detector that detects the mechanical rotation of a roller provided on the seat plate 17 so as to be in contact with 2 may be used.
The input unit 32b is an input unit that receives an output of the seat plate switch 31, and is configured as an input terminal connected to the output terminal of the seat plate switch 31 via a signal line (not shown), for example.
The display unit 32c is an output unit that notifies the transmitter 32 that a signal is being transmitted by the transmitter 32, and is configured as an LED, for example.
The registration switch 32d is a registration operation means for registering the receiver 33 with which the transmitter 32 should communicate, and is configured as a push button switch that performs output according to the pressed state, for example. The registration switch 32d is also used as a test switch for testing the normality of the function of the shutter obstacle detection system 30. Of the outputs from the registration switch 32d, the output when not pressed is referred to as "test switch off output", and the output when pressed is referred to as "test switch on output".

The first transmission unit 32e is a transmission unit that transmits the obstacle detection state signal at a first frequency in a predetermined first frequency band.
The first receiving unit 32f is a receiving unit that receives a predetermined signal other than the obstacle detection state signal at a second frequency in a predetermined second frequency band different from the first frequency band.

Here, the first frequency band and the second frequency band will be described.
The first frequency band may be a frequency band in which the obstacle detection state signal can be transmitted. In particular, in the present embodiment, the first frequency band is a frequency band in which the obstacle detection state signal can be continuously transmitted. The “frequency band in which continuous transmission is possible” is a frequency band in which continuous transmission of signals is permitted (not required to pause or stop transmission) according to communication laws and standards. In particular, in the present embodiment, carrier sense is performed at the time of signal transmission in order to prevent signal collision when a plurality of shutter obstacle detection systems 30 are disposed close to the shutter device 10. Use the required frequency band. As the first frequency band that meets such conditions, for example, a 429 MHz band for specific low-power radio stations (specifically, a band of 40 channels at intervals of 12.5 KHz from 429.2500 MHz to 4297375 MHz). is there.

  On the other hand, the second frequency band may be a frequency band that can transmit a predetermined signal, but in the present embodiment, a frequency band that allows intermittent transmission is used. In the present embodiment, a frequency band that does not require carrier sense is used for the second frequency band. As the second frequency band that matches such a condition, for example, there is a 315 MHz band (specifically, a band exceeding 312 MHz and not more than 315.25 MHz) for a specific low-power radio station.

  In the following, for convenience of explanation, the frequency (first frequency) that is included in the first frequency band and the first transmitting unit 32e transmits a signal is “429 MHz”, and is the frequency included in the second frequency band. The frequency (second frequency) at which the first receiving unit 32f receives a signal is referred to as “315 MHz”.

  The antenna 32g is a transmission / reception element that transmits the obstacle detection state signal output from the first transmission unit 32e, or receives a predetermined signal and inputs the signal to the first reception unit 32f. Only one antenna 32g is provided, and this antenna 32g is used for transmission / reception of signals of two frequencies of 429 MHz and 315 MHz. For this reason, the total length of the antenna 32g is determined to be, for example, a predetermined integer ratio of a wavelength of 429 MHz and a predetermined integer ratio of a wavelength of 315 MHz (an antenna 33g of a receiver 33 described later). The same).

  The storage unit 32h is a storage unit that stores various programs and data necessary for operating the transmitter 32 in a nonvolatile manner, and is configured as, for example, an EEPROM. In particular, identification information (hereinafter referred to as a transmitter ID) for uniquely identifying the transmitter 32 is stored in the storage unit 32h at an arbitrary timing such as when shipped from the factory. The storage unit 32h stores the cumulative number of opening / closing times of the shutter curtain 12.

  The power supply unit 32 i is configured to include a battery (not shown), and supplies power supplied from the battery to each unit of the transmitter 32. That is, the transmitter 32 is a communication means that operates on the power of the battery.

  The control unit 32j is a control unit that controls each unit of the transmitter 32, and includes, for example, a CPU that executes a program stored in the storage unit 32h. This control unit 32j is provided for a registration processing means for executing a registration process described later, a periodic notification processing means for executing a periodic notification process described later, an obstacle detection processing means for executing an obstacle detection process described later, and the transmitter 32. Measuring means for measuring the elapsed time since the battery was connected, and measuring means for measuring various times by functioning as a measuring means for counting the number of times that the shutter curtain 12 has been specified by a predetermined method. As an internal timer. Further, the control unit 32j is configured such that the closing operation of the shutter curtain 12 is activated when an activation on signal transmitted from a second transmission unit 33f of the receiver 33 described later is received by the first reception unit 32f. It is the 1st specific means to identify.

(Configuration-Shutter obstacle detection system-Receiver)
Next, the configuration of the receiver 33 in FIG. 1 will be described. The receiver 33 is a second communication unit that receives an obstacle detection state signal by radio (radio wave). FIG. 3 is a block diagram showing an electrical configuration of the receiver 33. The receiver 33 includes an input unit 33a, an output unit 33b, a display unit 33c, a registration switch 33d, a second reception unit 33e, a second transmission unit 33f, an antenna 33g, a storage unit 33h, a power supply unit 33i, and a control unit 33j. They are connected as shown in the figure.

The input unit 33a is an input unit that receives an input of an output from the interlock repeater 16, and is configured as, for example, an input terminal connected to an output terminal of the interlock repeater 16 via a signal line (not shown).
The output unit 33b is an output unit that outputs an obstacle detection state signal to the interlocking relay 16. For example, the output unit 33b is configured as an output terminal connected to an input terminal of the interlocking relay 16 via a signal line (not shown). ing. In particular, the output unit 33b switches the type of signal to be output by switching the resistance value inside the output unit 33b. In the present embodiment, as the types of signals to be output, a signal when no obstacle is detected by the seat plate switch 31 is “a seat plate switch-off signal”, and a signal when an obstacle is detected by the seat plate switch 31 is “the seat plate”. "Switch-on signal", a signal when a communication failure occurs between the transmitter 32 and the receiver 33, a "communication failure signal", a signal when the battery of the transmitter 32 is exhausted "battery depletion signal" A signal when the cumulative number of times the shutter curtain 12 has been opened or closed is equal to or greater than a predetermined number is referred to as an “opening / closing frequency over signal”. A different resistance value (or resistance range) is set in advance for each of these signals, and the resistance value inside the output unit 33b is set to a resistance value corresponding to the type of signal to be output. The current value flowing from the receiver 33 to the interlock repeater 16 is changed, and the signal is output to the interlock repeater 16.

The display unit 33c is output means for notifying the outside of the receiver 33 that a signal is being received by the receiver 33, and is configured as an LED, for example.
The registration switch 33d is a registration operation means for registering the combination of the transmitter 32 and the receiver 33 to communicate with each other in the transmitter 32 and the receiver 33, and is configured as a push button switch, for example. ing.

The second receiving unit 33e is a receiving unit that receives the obstacle detection state signal in the first frequency band.
The second transmission unit 33f is a transmission unit that transmits a predetermined signal in the second frequency band.

  The antenna 33g is a transmission / reception element that transmits a predetermined signal output from the second transmission unit 33f or receives an obstacle detection state signal and inputs the signal to the second reception unit 33e.

  The storage unit 33h is a storage unit that stores various programs and data necessary for operating the receiver 33 in a nonvolatile manner, and is configured as, for example, an EEPROM. In particular, identification information (hereinafter referred to as receiver ID) for uniquely identifying the receiver 33 is stored in the storage unit 33h at an arbitrary timing such as when shipped from the factory.

  The power supply unit 33 i is connected to the interlocking relay 16 via a power line (not shown), and supplies the power supplied from the interlocking relay 16 to each part of the receiver 33.

  The control unit 33j is a control unit that controls each unit of the receiver 33, and includes, for example, a CPU that executes a program stored in the storage unit 33h. The control unit 33j executes registration processing means for executing registration processing described later, periodic notification processing means for executing periodic notification processing described later, obstacle detection processing (including descending stop processing) described later, and descent restart processing. It functions as an obstacle detection processing means, and includes an internal timer (not shown) as a time measuring means for measuring various times.

(processing)
Next, processing executed in the shutter obstacle detection system 30 configured as described above will be described. This process is roughly divided into a registration process, a periodic notification process, an obstacle detection process, a descent restart process, and a test process. Hereinafter, after describing the processes common to these processes, each process will be described in turn. In the following, “step” is abbreviated as “S”.

First, “carrier sense”, which is a process common to the processes, will be described.
When transmitting a signal via the first transmitter 32e at 429 MHz, the transmitter 32 performs carrier sense, thereby identifying an empty channel that can be used for transmission and preventing radio wave collision.
Specifically, 40 channels of 429 MHz are set as candidate channels, and one channel is selected from the candidate channels. Then, the first transmission unit 32e is once set as a receiving unit, the received signal strength of the selected channel is measured, and the selected signal strength is determined by determining whether or not the measured signal strength is a predetermined threshold value or more. It is determined whether or not the channel is an empty channel. If it is not an empty channel, another channel is selected from the candidate channels, and the empty channel is similarly determined. Thereafter, similarly, the determination is sequentially performed on each candidate channel, the channel first determined to be an empty channel is specified as an empty channel that can be used for transmission, and the carrier sense is terminated.
The candidate channels may be limited from 40 channels. For example, for each combination of the transmitter 32 and the receiver 33 (for example, the own transmitter ID stored in advance in the storage unit 32h and the registration process) A preset channel is set as a candidate channel for each combination with the receiver ID of the communication partner stored in the storage unit 32h, or a predetermined number (for example, about 3 to 6) of channels is set as a candidate channel. May be.
Immediately after this carrier sense, a connection request signal is transmitted from the transmitter 32 to the receiver 33 via the specified empty channel, and a connection response signal is transmitted from the receiver 33 that has received this connection request signal to the transmitter 32. Thus, communication between the transmitter 32 and the receiver 33 is established.

Next, “channel scan” which is a process common to the processes will be described.
Since the receiver 33 receives a signal at 429 MHz via the second receiving unit 33e, the receiver 33 identifies the channel used by the transmitter 32 to transmit the signal at 429 MHz by performing a channel scan, and transmits on that channel. Attempts to receive the signal transmitted from the machine 32.
Specifically, one channel is selected from the candidate channels set similarly to the carrier sense of the transmitter 32. Then, it is monitored whether or not a signal can be received via the second receiving unit 33e within a predetermined time by the selected channel. If the signal can be received, the transmitter ID included in the signal is Then, it is determined whether or not it matches the transmitter ID stored in its own storage unit 33h in the registration process described later. If the signal cannot be received within the predetermined time, or if the transmitter ID does not match even if it can be received, another channel is selected from the candidate channels, and signal reception is performed in the same manner. The presence / absence and transmitter ID match is determined. Thereafter, in the same manner, each candidate channel is sequentially determined, and the channel determined to contain the matching transmitter ID is identified as the channel used by the transmitter 32 for signal transmission, and the channel scan ends. To do. In the channel scan before the registration process is performed, the transmitter ID match determination is omitted.
In the following description, it is assumed that the receiver 33 constantly repeats this channel scan unless otherwise specified.

Next, “intermittent reception”, which is a process common to the processes, will be described.
The transmitter 32 monitors whether or not a predetermined intermittent reception timing (for example, every several seconds) has arrived, and if it has arrived, supplies power to the first receiving unit 32f for a predetermined time (for example, several ms). Thus, reception is performed at 315 MHz via the first receiving unit 32f for the predetermined time. The reason why intermittent reception is performed in this way is to reduce battery power consumption required for signal reception.
Although details will be described later, if a predetermined condition is satisfied during intermittent reception every few seconds, reception processing is performed with a shorter interval between intermittent receptions. That is, when the output from the vibration sensor 32a provided in the transmitter 32 is turned on, the shutter curtain 12 is descending, and there is a high possibility that the signal is transmitted from the receiver 33 to the transmitter 32. 32 makes the interval of intermittent reception shorter than usual.
It should be noted that reception may be completely stopped in normal times, and intermittent reception may be started when the output from the vibration sensor 32a is turned on. However, when the shutter curtain 12 is smoothly lowered, the vibration is vibrated. Since there is a possibility that the sensor 32a cannot detect or a failure may occur in the function of the vibration sensor 32a, the reliability of obstacle detection is further improved by performing intermittent reception regardless of the output from the vibration sensor 32a. I am letting.
In the following description, it is assumed that the transmitter 32 constantly repeats this intermittent reception unless otherwise specified.

(Processing-Registration process)
Next, the registration process will be described. FIG. 4 is a flowchart of the registration process. This registration process is a process for registering the transmitter ID of the transmitter 32 as a communication partner with the receiver 33, and is activated when the transmitter 32 and the receiver 33 are powered on.

  First, the control unit 33j of the receiver 33 monitors whether or not the registration switch 33d of the receiver 33 has been operated by the user in a predetermined method (for example, whether or not it has been continuously pressed for a predetermined time) (SA1). ), When operated (SA1, Yes), it enters a state of waiting for reception of the transmitter ID transmitted from the transmitter 32 (SA2).

  On the other hand, the control unit 32j of the transmitter 32 monitors whether or not the registration switch 32d of the transmitter 32 has been operated by the user in a predetermined method (for example, whether or not it has been continuously pressed for a predetermined time) (SA3). When operated (SA3, Yes), carrier sense at 429 MHz is performed via the first transmission unit 32e, thereby specifying an available channel that can be used for transmission (SA4, SA5). When the vacant channel can be specified (SA5, Yes), the control unit 32j sends a signal including the transmitter ID stored in the storage unit 32h in advance through the first transmission unit 32e. Transmission is performed at 429 MHz (SA6).

  On the other hand, the control unit 33j of the receiver 33 specifies a channel used by the transmitter 32 to transmit a signal at 429 MHz by performing a channel scan while waiting for a transmitter ID to be received in SA2, and in that channel, An attempt is made to receive the signal transmitted from the transmitter 32 (SA2). If the signal including the transmitter ID can be received (SA2, Yes), the control unit 33j stores the transmitter ID included in the signal in the storage unit 33h as the transmitter ID of the transmitter 32 serving as a communication partner. Store (SA7). This completes the registration process.

  Here, it is assumed that the transmitter 32 and the receiver 33 perform one-to-one communication, and the registration process is performed in a state where the communication partner transmitter ID is already stored in the storage unit 33h of the receiver 33. In this case, it is assumed that the transmitter ID in the storage unit 33h is overwritten by the newly received transmitter ID. However, when performing one-to-many communication, a plurality of transmitter IDs may be registered in the storage unit 33h. The registration process is valid only for a predetermined time (for example, one minute) after the registration switch 32d is pressed by the user. If the transmitter ID of the communication partner cannot be received within this time, the registration process is performed. May be terminated. Further, the receiver ID may be registered in the transmitter 32 by the same process as the registration of the transmitter ID. That is, the receiver ID may be transmitted from the receiver 33 to the transmitter 32, and the receiver ID may be stored in the storage unit 32h of the transmitter 32. In this case, when the transmitter 32 intermittently receives a signal transmitted at 315 MHz from the receiver 33 thereafter, the transmitter 32 stores the receiver ID included in the signal in its own storage unit 33h. It may be determined whether or not the receiver ID matches, and the signal may be accepted as a valid signal only if it matches.

(Processing-Periodic report processing)
Next, the periodic notification process will be described. FIG. 5 is a flowchart of the regular notification process. This process is a process of periodically transmitting information on the normality of the function of the transmitter 32 and the output state of the seat switch 31 to the receiver 33, and is automatically and repeatedly activated after the registration process.

  First, the control unit 33j of the receiver 33 monitors whether or not a predetermined periodic notification timing (for example, every several days) has arrived (SB1), and if it has arrived (SB1, Yes), a periodic notification request signal Is transmitted at 315 MHz via the second transmitter 33f (SB2). The periodic notification request signal is a signal including data indicating that a periodic notification is requested, and is generated in a predetermined format.

  On the other hand, when the control unit 32j of the transmitter 32 receives the periodic notification request signal from the receiver 33 by intermittent reception (SB3, Yes), the carrier sense is performed to identify an empty channel (SB4, SB5), and the periodic A report signal is generated and transmitted at 429 MHz through an empty channel via the first transmitter 32e (SB6). This periodic notification signal (obstacle detection state signal) is data indicating whether the output from the seat plate switch 31 is a seat plate switch-off output or a seat plate switch-on output, and an output test switch-off output from the test switch. And data indicating whether or not the test switch is on, data indicating whether or not the battery is consumed, data indicating whether or not the cumulative number of times of opening and closing of the shutter curtain 12 stored in the storage unit 32h, and the storage unit 32h are set. This signal includes the transmitter ID and is generated in a predetermined format.

  At this time, the determination of whether or not the battery is consumed is performed, for example, as follows. That is, the control unit 32j compares the battery voltage obtained by a known method with a predetermined threshold value, and determines that there is no battery consumption if the voltage is equal to or higher than the predetermined threshold value. Judge that there is. Alternatively, the control unit 32j continuously calculates the elapsed time after the battery is connected to the transmitter 32 (more specifically, the elapsed time after the battery power is supplied to each unit of the transmitter 32). The elapsed time is compared with a predetermined time (for example, several years). If the elapsed time is less than the predetermined time, it is determined that the battery is not consumed. If the elapsed time is equal to or longer than the predetermined time, the battery is consumed. Is determined. When it is determined that the battery is consumed, the control unit 32j notifies the outside that the battery is consumed by lighting or blinking the display unit 32c.

  In addition, the determination of whether or not the cumulative number of open / close times has been exceeded at this time is performed as follows, for example. That is, in the obstacle detection process described later, every time the transmitter 32 receives a start-on signal or every time the vibration sensor 32a outputs a vibration detection signal, the control unit 32j performs the cumulative number of opening and closing of the shutter curtain 12. Is incremented by one and stored in the storage unit 32h. In this process, the control unit 32j compares the cumulative number of opening / closing operations stored in the storage unit 32h with a predetermined number of times, and determines that the cumulative number of switching times is not over if the cumulative number of opening / closing operations is less than the predetermined number. If the cumulative open / close count is equal to or greater than the predetermined count, it is determined that the cumulative open / close count is exceeded. When it is determined that the cumulative number of opening / closing times has been exceeded, the control unit 32j notifies the outside that the battery is consumed by lighting or blinking the display unit 32c. However, since the purpose of determining whether or not the cumulative number of switching times has been exceeded is to predict whether or not the battery has been exhausted, either the determination of whether or not the battery has been exhausted or the determination of exceeding the cumulative number of switching times is omitted. May be.

  Next, the control unit 33j of the receiver 33 monitors whether or not the communication establishment associated with the carrier sense of the transmitter 32 can be established within a predetermined time after SB2 (SB7) and establishes the communication. If it is not possible (SB7, No), a communication failure signal is output to the interlock repeater 16 (SB8), and the periodic notification process is terminated. Upon receiving the communication failure signal, the interlock repeater 16 turns on or blinks a predetermined indicator light indicating the communication failure or outputs a communication failure signal to a predetermined external device. To inform. On the other hand, when the communication can be established within the predetermined time (SB7, Yes), the control unit 33j receives the periodic notification signal at 429 MHz via the second receiving unit 33e by the established communication (SB9, Yes), processing corresponding to the content of the periodic notification signal is performed (SB10). For example, the control unit 33j switches the resistance value inside the output unit 33b to output a seat plate switch-off signal or a seat plate switch-on signal, a battery exhaustion signal, and an open / close frequency over signal to the interlocking repeater 16. To do.

  At this time, the control unit 33j changes the seat plate switch-off signal and the seat plate switch-on signal (when the seat plate switch-off signal is switched to the seat plate switch-on signal or when the seat plate switch-on signal is This is a case where the signal is switched to the seat plate switch-off signal. In the present embodiment, when the descent stop process or descent resume process is activated in the obstacle detection process described later), the seat signal is given priority over the other signals. A plate switch-off signal or a seat plate switch-on signal is output. On the other hand, if there is no change in the seat plate switch-off signal and the seat plate switch-on signal for a predetermined time (for example, several hundred seconds), a signal other than the seat plate switch-off signal or the seat plate switch-on signal is output. To do. Here, when there are a plurality of signals to be output, only a signal with the highest priority (for example, a battery exhaustion signal) is output based on a predetermined priority, or each signal is output in order of priority. The output is sequentially switched at a predetermined interval. Upon receipt of this output, the interlock repeater 16 turns on or blinks a predetermined indicator indicating an abnormality or outputs an abnormality signal to a predetermined external device as necessary. The occurrence is notified to the outside.

(Processing-Obstacle detection processing)
Next, the obstacle detection process (hazard prevention process) will be described. 6 and 7 are flowcharts of the obstacle detection process. This process is a process for lowering the shutter curtain 12 when necessary while the regular notification process is being performed, and is started as an interrupt process for the regular report process. In particular, an obstacle detection process when the shutter curtain 12 is lowered by its own weight when a fire is detected by the fire detector 21 of the fire alarm system 20 will be described below.

  When a fire is detected by the fire detector 21 of the fire alarm system 20, the fire detector 21 outputs a fire detection signal to the disaster prevention panel 22, and the disaster prevention panel 22 outputs a transfer signal to the interlock repeater 16, The interlock repeater 16 outputs an activation signal to the automatic closing device 14, and the automatic closing device 14 releases the brake of the opening / closing machine 13 and starts the weight drop of the shutter curtain 12. At the same time, the interlock repeater 16 outputs a start-on signal to the receiver 33 to notify that the self-weight drop of the shutter curtain 12 has been started. As shown in FIG. 6, when the activation on signal is received via the input unit 33a of the receiver 33 (SC1, Yes), the control unit 33j of the receiver 33 sends the activation on signal to the second transmission unit 33f. (SC2).

  On the other hand, when the shutter curtain 12 starts its own weight drop, the vibration sensor 32a that has detected the vibration of the shutter curtain 12 that is generated along with the weight drop outputs a vibration detection signal. When this vibration detection signal is output (SC3, Yes), the control unit 32j of the transmitter 32 outputs the vibration detection signal even if a predetermined time (for example, 1s) has elapsed since the output. (SC4, No), if not output (SC4, No), it returns to SC3 assuming that the temporary vibration of the shutter curtain 12 due to an earthquake or wind is detected. On the other hand, if it is output (SC4, Yes), it is assumed that the continuous vibration of the shutter curtain 12 due to the descent has been detected, and whether or not the timing of intermittent reception at regular intervals at normal times has arrived. Regardless, interrupt reception at 315 MHz is performed via the first receiver 32f (SC5). If the vibration detection of the vibration sensor 32 a is the descent control of the shutter curtain 12 based on the activation signal output from the interlock repeater 16, the activation on signal should have been transmitted from the receiver 33. An attempt is made to promptly receive the activation on signal (SC6). If the activation on signal is not received within the predetermined time (SC6, No), the controller 32j determines that the vibration detected by the vibration sensor 32a is not caused by the descent of the shutter curtain 12, and SC3 Return to. On the other hand, when the activation on signal can be received within the predetermined time (SC6, Yes), the control unit 32j specifies that the closing operation of the shutter curtain 12 has been activated, and sets the cumulative number of opening and closing of the shutter curtain 12 by one. After being incremented and stored in the storage unit 32h, in order to transmit the state information on the transmitter side from the transmitter to the receiver side, carrier sense is performed at 429 MHz, and an empty channel used for transmission is specified (SC7). , SC8).

  Next, the control unit 32j generates a transmitter information signal (obstacle detection state signal), and continuously transmits the transmitter information signal through the first transmission unit 32e for a predetermined time in an empty channel at 429 MHz (SC9). ). This transmitter information signal includes data indicating whether the output from the seat plate switch 31 is a seat plate switch-off output or a seat plate switch-on output, the output from the test switch, the test switch-off output, and the test switch-on output. Data indicating whether or not the battery is exhausted, data indicating whether or not the cumulative number of opening and closing of the shutter curtain 12 is stored in the storage unit 32h, and a transmitter ID set in the storage unit 32h. It is a signal, is generated in a predetermined format, and repeatedly transmits transmitter information signals in a predetermined format. In this case, continuous transmission is performed by avoiding the time required to stop or stop signal transmission, and by transmitting the state of the seat plate switch 31 to the receiver 33 as early as possible. This is to stop the descent of the shutter curtain 12 as early as possible. The transmitter information signal transmitted by the transmitter 32 of SC9 may send the same data as SB6 of FIG. 5, and the outputs from the seat plate switch 31 are the seat plate switch-off output and the seat plate switch-on output. It is possible to send only the data necessary for the obstacle detection process by sending only the data indicating the ID and the transmitter ID. Further, in order to manage the lapse of the predetermined time for performing this continuous transmission, the control unit 32j starts measuring the transmission time by the internal timer of the control unit 32j simultaneously with or immediately after the SC9, as shown in FIG. In this way, it is monitored whether or not the measured time exceeds a predetermined time (SC14), and when it exceeds the predetermined time (SC14, Yes), continuous transmission of the transmitter information signal is stopped (SC15). ) The communication established with the receiver 33 is interrupted, and intermittent reception is resumed. The predetermined time of SC13 is set to an arbitrary time longer than the time until the shutter curtain 12 in the fully opened state descends its own weight until it is fully closed, and the seat plate switch 31 is seated for some reason when fully closed. This is a process for preventing wasteful consumption of the battery power by continuously transmitting from the transmitter 32 when the plate switch-on output cannot be performed.

  During a predetermined period of continuous transmission managed in this way, the control unit 32j sequentially generates and transmits a transmitter information signal including data corresponding to the output at each time point from the seat plate switch 31. Then, when the shutter curtain 12 hits an obstacle during the predetermined time of the continuous transmission, or when the shutter curtain 12 is fully closed, the output from the seat plate switch 31 becomes the seat plate switch-on output. When it becomes (SC13, Yes), the descent stop process is started to stop the descent of the shutter curtain 12 (SC16). Details of the descent stop process will be described later. In addition, when the output from the seat plate switch 31 becomes the seat plate switch-on output, the control unit 32j turns on or blinks the display unit 32c so that the output of the seat plate switch 31 is on. Inform the outside that there is.

  On the other hand, as shown in FIG. 6, the control unit 33j of the receiver 33 starts timing by the internal timer of the control unit 32j in order to measure the communication establishment time at the same time or immediately after the start-up signal transmission in SC2. Then, it is monitored whether or not communication with the transmitter 32 can be established before the measured time exceeds a predetermined time (SC10). If communication cannot be established after a predetermined time or more (SC10, No), a communication failure is output (SC11). As processing of the communication failure, the occurrence of the communication failure is notified to the outside by outputting a communication failure signal to a predetermined external device such as the receiver 33, the interlocking repeater 16, and the disaster prevention panel 22. On the other hand, if communication can be established with carrier sense in SC7 of the transmitter 32 before the predetermined time or longer, the transmitter information signal from the transmitter 32 at 429 MHz is transmitted via the second receiver 33e. Receive continuously (SC12).

  Further, the control unit 33j starts timing by the internal timer of the control unit 32j in order to measure the reception time at the same time or immediately after reception of the transmitter information signal in SC12, as shown in FIG. It is monitored whether or not the measured time exceeds a predetermined time (SC18). If the measured time exceeds the predetermined time (SC18, Yes), reception of the transmitter information signal is stopped (SC19). The communication established with 32 is cut off, and the channel scan is resumed.

  During the predetermined reception time managed as described above, the control unit 33j monitors the data corresponding to the output of the seat switch 31 included in the transmitter information signal for each time point, and during the predetermined reception time. In addition, when data indicating that the output from the seat plate switch 31 is a seat plate switch-on output is received (SC13, Yes), the descent stop process is started in order to stop the descent of the shutter curtain 12 ( SC16). Details of the descent stop process will be described later.

  In addition, during continuous transmission from SC9 in FIG. 6 to SC14 in FIG. 7, if it is necessary to stop this continuous transmission for some reason, the receiver that has received the output from the interlock repeater 16 33 control part 33j transmits the continuous transmission stop instruction | indication signal for instruct | indicating the stop of continuous transmission at 315 MHz via the 2nd transmission part 33f, transfers to SC19, and stops reception. On the other hand, when the control unit 32j of the transmitter 32 receives the continuous transmission stop instruction signal at 315 MHz via the first receiving unit 32f, the control unit 32j proceeds to SC15 and continues even before the predetermined time of SC14 has elapsed. Stop sending. That is, in the present embodiment, the stop condition for stopping the continuous transmission of the transmitter information signal by the first transmission unit 32e is that the predetermined time of SC14 has elapsed or the continuous transmission stop instruction signal has been received. Until either one of these conditions is satisfied, the transmitter information signal is continuously transmitted regardless of the change in the output state of the seat plate switch 31, and the transmitter is transmitted according to the output state of the seat plate switch 31. Only the contents of the information signal are rewritten.

(Processing-Obstacle detection processing-Descent stop processing)
Next, details of the descent stop process of SC16 will be described. FIG. 8 is a flowchart of the descent stop process. This process is a process for stopping the descent of the shutter curtain 12.

  First, the control unit 33j of the receiver 33 that has received data indicating that the seat plate switch-on output has been received from the transmitter 32 because the obstacle has been detected or the shutter curtain has been fully closed, the inside of the output unit 33b The seat plate switch-on signal is output to the interlocking repeater 16 by switching the resistance value (SD1). Here, as described above, the seat plate switch-on signal is output with priority over other signals. The interlock repeater 16 that has received the seat plate switch-on signal controls the weight drop of the shutter curtain 12 based on the detection state of the lower limit switch and the presence or absence of a power failure in the shutter device 10 specified by a known method. . Specifically, when the lower limit switch detects that the lower end of the shutter curtain 12 is located above the lower limit position, and the shutter device 10 is not out of power, it automatically closes. A control signal is output to the device 14, the automatic closing device 14 activates the brake of the switch 13 to stop the weight drop of the shutter curtain 12 once, drives the switch 13 to raise it for a predetermined time, and then stops. Perform operation (touch-up operation). In this case, the interlock repeater 16 continues to output the activation on signal to the receiver 33. Alternatively, when the lower limit switch detects that the lower end of the shutter curtain 12 is located above the lower limit position, and the shutter device 10 is out of power, the automatic closing device 14 is used. A control signal is output, and the automatic closing device 14 operates the brake of the switch 13 to temporarily stop the weight drop of the shutter curtain 12 (touch stop operation). Also in this case, the interlock repeater 16 continues to output the activation on signal to the receiver 33. On the other hand, when it is detected by the lower limit switch that the lower end of the shutter curtain 12 is located below the lower limit position, the shutter curtain 12 can be controlled regardless of whether or not the shutter device 10 is out of power. After a predetermined time has elapsed after the lower end has passed the lower limit position, a control signal is output to the automatic closing device 14, and the automatic closing device 14 activates the brake of the switch 13 to stop the weight drop of the shutter curtain 12 ( Complete stop operation). The predetermined time at this time is set to stop the shutter curtain 12 further below the position where the seat plate switch 31 is in contact with the floor surface and the seat plate switch is turned on. The reason why the stop after the predetermined time elapses is to prevent a gap from being formed between the seat plate and the floor surface even when the floor surface is inclined. When the complete stop operation is performed as described above, the interlock repeater 16 outputs a start-off signal to the receiver 33.

  The controller 33j of the receiver 33 monitors the elapsed time after receiving data indicating that the output from the seat plate switch 31 is the seat plate switch-on output in SC17 of FIG. 7 by using an internal timer (SD2). The output of the start-off signal from the interlock repeater 16 is monitored (SD3). If the activation-off signal is received from the interlock repeater 16 (SD3, Yes) before the elapsed time continues for a predetermined time or longer (SD2, No), the second transmission unit 33f uses the activation-off signal at 315 MHz. (SD4), the reception of the transmitter information signal is stopped (SD5), the communication established with the transmitter 32 is interrupted, the descent stop process is terminated, and the obstacle detection shown in FIG. The process ends. On the other hand, before receiving the activation-off signal from the interlock repeater 16 (SD3, No), if the elapsed time continues for a predetermined time or more (SD2, Yes), the transmitter information is transmitted without transmitting the activation-off signal. The reception of the signal is stopped (SD5), the communication established with the transmitter 32 is interrupted, the descent stop process is terminated, and the obstacle detection process of FIG. 7 is terminated.

  Further, the control unit 32j of the transmitter 32 monitors the elapsed time after the output from the seat plate switch 31 becomes the seat plate switch-on output in SC13 of FIG. Whether or not a start-off signal is received from is monitored (SD7). If the activation-off signal is received from the receiver 33 (SD7, Yes) before the elapsed time continues for a predetermined time or longer (SD6, No), it is considered that a complete stop operation has been performed. The continuous transmission is immediately stopped to suppress battery consumption (SD8), the communication established with the receiver 33 is interrupted, the descent stop process is terminated, and the obstacle detection process of FIG. 7 is terminated. On the other hand, before receiving the start-off signal from the receiver 33 (SD7, No), if the elapsed time has continued for a predetermined time or longer (SD6, Yes), a touch-up operation or a touch stop operation has been performed. Therefore, continuous transmission is stopped to reduce battery consumption (SD8), communication established with the receiver 33 is interrupted, the descent stop process is terminated, and the obstacle detection process of FIG. 7 is terminated. .

(Processing-Obstacle detection processing-Descent resumption processing)
Next, the descent restart process will be described. 9 and 10 are flowcharts of the descent restart process. This process is a process for restarting the descent of the shutter curtain 12 stopped by the descent stop process. After the descent of the shutter curtain 12 is stopped in the descent stop process, the process is automatically performed based on the output of the seat plate switch 31. Will be launched. However, the descent restart process is performed only after the touch-up operation or after the touch stop operation, and is not performed after the complete stop operation.

  First, after the descent of the shutter curtain 12 is stopped by the touch-up operation or the touch stop operation in the descent stop process, the control unit 32j of the transmitter 32 monitors the output from the seat plate switch 31 (SE1). When an obstruction is removed and a seat plate switch-off output is input from the seat plate switch 31 (SE1, Yes), an empty channel used for transmission is specified by performing carrier sense at 429 MHz. (SE2, SE3). Then, the control unit 32j generates a transmitter information signal, and continuously transmits the transmitter information signal through the first transmission unit 32e for a predetermined time using an empty channel at 429 MHz (SE4). This transmitter information signal is generated in the same manner as SC9 in FIG. 6 except that the transmitter information signal includes data indicating that the output from the seat plate switch 31 is a seat plate switch-off output.

  On the other hand, when the communication unit 33j of the receiver 33 can establish communication with the carrier sense of the transmitter 32 (SE5, Yes), the output from the seat plate switch 31 is the seat plate switch-off output. The transmitter information signal including the data indicating is received via the second receiving unit 33e at 429 MHz (SE6), and the obstacle is removed from the interlocking repeater 16 by switching the resistance value inside the output unit 33b. A seat plate switch-off signal is output (SE7). Upon receiving this seat plate switch-off signal, the interlock repeater 16 outputs a control signal to the automatic closing device 14 after a predetermined time has elapsed when the person who is caught can evacuate from the shutter curtain 12 with certainty. Releases the brake of the opening / closing machine 13 and resumes the weight drop of the shutter curtain 12 again. At the same time, the interlock repeater 16 outputs a start-on signal to the receiver 33 to notify that the weight reduction of the shutter curtain 12 has been resumed. When the activation on signal is received via the input unit 33a (SE8, Yes), the control unit 33j of the receiver 33 receives the activation on signal at 315 MHz via the second transmission unit 33f as shown in FIG. Transmit (SE9).

  On the other hand, the control unit 32j of the transmitter 32 starts the continuous transmission of the transmitter information signal in SE4 of FIG. 9, and then manages the lapse of a predetermined time for performing this continuous transmission. By starting the transmission time measurement by the internal timer of the control unit 32j, as shown in FIG. 10, it is monitored whether or not the time measured has become a predetermined time or more (SE12). When the predetermined time or longer is reached (SE12, Yes), the continuous transmission is stopped (SE13) similarly to the SC14 of FIG. 7, the communication established with the receiver 33 is interrupted, and intermittent reception is performed. Return.

  During a predetermined period of continuous transmission managed in this way, the control unit 32j generates and transmits a transmitter information signal including data corresponding to the output from the seat plate switch 31 at each time point. Then, when the output from the seat plate switch 31 again becomes the seat plate switch-on output during the predetermined time of the continuous transmission (SE11, Yes), in order to stop the descent of the shutter curtain 12, FIG. The descent stop process is started again (SE14). Thereafter, the descent stop process and the descent restart process are repeated according to the output of the seat plate switch 31 as described above.

  On the other hand, after receiving the transmitter information signal in SE6 of FIG. 9, the control unit 33j of the receiver 33 starts the time measurement by the internal timer of the control unit 32j in order to measure the reception time of 429 MHz. As shown in (6), it is monitored whether the measured time is equal to or longer than a predetermined time (SE16). When the predetermined time has elapsed (SE16, Yes), the reception is stopped (SE17), the communication established with the transmitter 32 is interrupted, and the channel scan is resumed.

  During the predetermined time of reception managed in this way, the control unit 33j monitors data corresponding to the output of the seat switch 31 included in the transmitter information signal for each time point. Then, when data indicating that the output from the seat plate switch 31 is the seat plate switch-on output is received again during the predetermined time of reception (SE15, Yes), the descent of the shutter curtain 12 is stopped. Therefore, the descent stop process of FIG. 8 is started again (SE14). Thereafter, the descent stop process and the descent restart process are repeated according to the output of the seat plate switch 31 as described above.

In the above description of the obstacle detection process, the process when the shutter curtain 12 is lowered by its own weight has been described. However, even when the shutter curtain 12 is electrically lowered, the obstacle detection process is performed except for the following points. The same is done. That is, in the case of electric descent, when the user operates the manual closing device 15, the interlock repeater 16 outputs an activation signal to the switch 13, and the switch 13 winds the winding shaft in a state where the brake is released. The shutter curtain 12 is electrically lowered by driving in the ejecting direction. When the output from the seat plate switch 31 becomes the seat plate switch-on output, the interlock repeater 16 controls the shutter curtain 12 based on the detection state of the lower limit switch. Specifically, when the lower limit switch detects that the lower end of the shutter curtain 12 is located above the lower limit position, the lower end of the shutter curtain 12 may have contacted an obstacle. Therefore, the descent of the shutter curtain 12 is temporarily stopped, and then the interlocking relay 16 that has received the seat plate switch-on signal from the receiver 33 outputs a start signal to the switch 13, and the switch 13 releases the brake. In this state, the shutter curtain 12 is lifted by a predetermined amount by driving the winding shaft in the winding direction to stop by driving the winding shaft by a predetermined amount (touch-up operation), thereby preventing damage to obstacles more reliably. To do. On the other hand, when the lower limit switch detects that the lower end of the shutter curtain 12 is located below the lower limit position, it is considered that the lower end of the shutter curtain 12 is in contact with the floor surface. An operation for stopping the descent of the curtain 12 (touch stop operation) is performed. In any of these cases, the shutter curtain 12 is not automatically lowered again during the electric lowering, but the user operates the manual closing device 15 again to lower the shutter curtain 12 as necessary. In any case, the interlock repeater 16 outputs a start-off signal to the receiver 33, and the control unit 33j of the receiver 33 that has received the start-off signal sets the start-off signal to 315 MHz and the second transmitter 33f. When the start-off signal is received, the control unit 32j of the transmitter 32 immediately stops the continuous transmission to reduce battery consumption and cut off the communication established with the receiver 33.
When the obstacle is removed after the shutter curtain 12 is temporarily stopped and the output from the seat plate switch 31 becomes the seat plate switch-off output, the descent resuming process may not be performed. The shutter curtain 12 may be lowered again after a predetermined time after receiving the seat plate switch-off output as described above.

(Processing-Test processing)
Next, the test process will be described. This process is a process for performing a test on the normality of the functions of the transmitter 32 and the receiver 33, and is activated at an arbitrary timing by a user operation. First, the control unit 32j of the transmitter 32 determines whether or not the registration switch 32d of the transmitter 32 has been operated by a user in a predetermined method (for example, continuously for a predetermined time different from the pressing time of the registration switch 32d in the registration process). If it is operated, a transmitter information signal including data indicating a seat plate switch-on output is generated as in the case of SC13-Yes in FIG. This transmitter information signal is continuously transmitted for a predetermined time via the first transmitter 32e on an empty channel at 429 MHz. Thus, the descent stop process of FIG. 8 is performed, and the function of the transmitter 32 and the receiver 33 is monitored by monitoring whether this descent stop process is normally executed during construction or periodic inspection. Can be tested for normality.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. it can. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

(Use of obstacle detection results)
In the above embodiment, the shutter lowering control is performed based on the detection result by the shutter obstacle detection system 30, but the detection result may be used for other purposes. For example, when the shutter device is for preventing a person from entering the security zone and is a lightweight shutter device, the shutter obstacle detection system 30 is less likely to cause harm to the obstacle. Even if an obstacle is detected, the shutter curtain descent may not be stopped, and only the transfer output to the security system may be performed.

(About frequency band selection)
For the first frequency band and the second frequency band, a frequency band other than the frequency band exemplified in the above embodiment may be selected. For example, when transmitting an obstacle detection state signal from the transmitter 32 to the receiver 33, if it is not necessary to perform continuous transmission, a frequency band in which continuous transmission cannot be performed (after performing transmission for a certain period of time, The first frequency band may be selected as the first frequency band). Further, when there is no possibility that the signals of the shutter obstacle detection system 30 provided in each of the plurality of shutter devices 10 may interfere with each other as in the case where the shutter device 10 is installed alone. The carrier sense at the time of signal transmission from the receiver 33 to the transmitter 32 may be omitted, and a frequency band for which carrier sense is not obligated may be selected as the first frequency band.

(Receiver and transmitter, and number of frequency bands)
In the above embodiment, the transmitter 32 is provided with the first receiver 32f and the first transmitter 32e, and the receiver 33 is provided with the second receiver 33e and the second transmitter 33f. By performing communication using the first frequency band and the second frequency band via the unit, communication is performed in 2 systems × 2 frequency bands. However, more than 2 communication systems may be provided, A number of frequency bands exceeding the frequency band may be used. For example, as a system for transmitting a signal from the receiver 33 to the transmitter 32, a system for transmitting an obstacle detection state signal and a system for transmitting battery consumption may be provided separately as dedicated systems, which are different from each other. You may transmit in a frequency band.

(About the closing action identification means)
In the above embodiment, the condition for changing the reception interval of the first receiving unit 32f is that a vibration detection signal is output from the vibration sensor 32a as the second specifying means, and continuous transmission of the first transmitting unit 32e is started. The condition for the above is that the reception of the activation on signal is specified by the control unit 32j as the first specifying means, but these conditions may be mutually changed, or one of them may be omitted. For example, the reception interval of the first receiving unit 32f may be changed according to the specified state of the first specifying unit, and the continuous transmission of the first transmitting unit 32e may be started according to the specified state of the second specifying unit. Using the specific state of the first specifying means and the specific state of the second specifying means as an AND condition or an OR condition, the reception interval of the first receiving unit 32f is changed, or continuous transmission of the first transmitting unit 32e is started. Also good.

(About changing the reception status of the transmitter 32)
In the above embodiment, when vibration is detected by the vibration sensor 32a, the reception state of the first receiver 32f of the transmitter 32 is changed from intermittent reception to interrupt reception. May be adopted. For example, when periodic notification is not necessary, when the vibration sensor 32a detects vibration by reducing the power consumption of the battery in the transmitter 32 by completely suspending the first receiver 32f in normal times. The first receiving unit 32f may be activated. Alternatively, the first reception unit 32f may be intermittently received during normal times, and the intermittent reception interval of the first reception unit 32f may be shortened when vibration is detected by the vibration sensor 32a. Thus, the concept of “shortening the intermittent reception interval” includes changing the reception state of the first reception unit 32f from intermittent reception to interrupt reception as in the above embodiment.
Further, in the above embodiment, the reception state of the first receiving unit 32f is changed only when the output from the vibration sensor 32a continues for a predetermined time, but the vibration due to an earthquake or wind is detected. When there is no need to consider the possibility, the reception state may be changed immediately when there is an output from the vibration sensor 32a.

(Appendix 1)
The shutter obstacle detection system according to appendix 1 is a shutter obstacle detection system that detects an obstacle to a shutter curtain that opens and closes an opening, and an obstacle that obstructs the closing operation of the shutter curtain is in the opening. An obstacle detection state including an obstacle sensor for detecting the presence, a closing operation specifying means for specifying that the closing operation of the shutter curtain is started, and information indicating an obstacle detection state by the obstacle sensor A first communication unit having a first transmission unit for wirelessly transmitting a signal, a second communication unit having a second reception unit for wirelessly receiving the obstacle detection state signal, and the second communication unit. Control means for performing opening / closing control of the shutter curtain based on the received signal, and the first transmission unit is configured to perform the closing operation specifying means by the closing operation specifying means. When it is determined that the closing operation of the shutter curtain is activated, the obstacle detection state signal is continuously transmitted. When the obstacle sensor detection state is changed by the obstacle sensor, the predetermined transmission of the continuous transmission is performed. Until the stop condition is satisfied, continuous transmission of the obstacle detection state signal including information indicating the detection state after the change is continued.

(Appendix 2)
The shutter obstacle detection system according to supplementary note 2 is the shutter obstacle detection system according to supplementary note 1, wherein the second communication means determines that the closing operation of the shutter curtain is activated by a predetermined method. A second transmission unit that transmits an activation signal indicating that the closing operation of the shutter curtain is activated; and the first communication unit includes a first reception unit that receives the activation signal. Has a first specifying means for specifying that the closing operation of the shutter curtain is started when the start signal is received by the first receiving unit.

(Appendix 3)
The shutter obstacle detection system according to supplementary note 3 is the shutter obstacle detection system according to supplementary note 2, wherein the closing action specifying means determines that the closing action of the shutter curtain is activated as a mechanical action of the shutter curtain. A second specifying unit for specifying the first receiving unit, when the second specifying unit specifies that the shutter curtain closing operation has been started; or It is characterized in that the reception interval of one receiving unit is shortened.

(Appendix 4)
In the shutter obstacle detection system according to appendix 4, in the shutter obstacle detection system according to appendix 3, when it is specified that the closing operation of the shutter curtain is activated by the second specifying unit, from the specified time Even if the predetermined time has elapsed, the first receiving unit is activated only when the second identifying means identifies that the shutter curtain closing operation has been activated, or the first reception is performed. It is characterized in that the reception interval of the part is shortened.

(Appendix 5)
The shutter obstacle detection system according to appendix 5 is the shutter obstacle detection system according to appendix 3 or 4 until the shutter curtain closing operation is specified by the second specifying means. When the first receiving unit is in an intermittent receiving state and the second specifying means specifies that the shutter curtain closing operation has been activated, the intermittent receiving timing of the first receiving unit has arrived. It is characterized in that it is in a reception state regardless of whether or not it has been performed.

(Effects of Appendix 1)
According to the shutter obstacle detection system described in appendix 1, information on the obstacle detection state when the shutter curtain is lowered can be transmitted by wireless communication with no directivity, so that a conventional signal line, cord reel, Problems due to optical communication can be solved, and the reliability and aesthetics of the shutter device can be improved.
In particular, because obstacle detection status signals are transmitted continuously, pause and wave stop times are not required for obstacle detection status signals, and wireless transmission and reception can be performed more quickly. It becomes possible to further improve the reliability of the system.
Also, when it is specified that the shutter curtain closing operation has been activated, in order to start the continuous transmission of the obstacle detection state signal, as in the case of starting the transmission of the signal after the obstacle is detected, Since there is no need to establish communication or start carrier sense after an obstacle is detected, the time it takes to send an obstacle detection status signal after an obstacle is detected can be shortened, and fault detection results can be communicated quickly. Thus, the safety of the shutter device can be improved.
In addition, when the obstacle detection state by the obstacle sensor changes, the obstacle detection state signal including the information indicating the detection state after the change is continuously transmitted until the predetermined stop condition of the continuous transmission is satisfied. Therefore, not only the state before the obstacle detection but also the state after the obstacle detection can be transmitted, and the obstacle detection result can be more reliably communicated, so that the safety of the shutter device can be improved. .

(Effects of Appendix 2)
According to the shutter obstacle detection system described in appendix 2, the first communication unit can reliably confirm that the shutter curtain closing operation has been activated by transmitting an activation signal from the second transmission unit to the first reception unit. Therefore, it is possible to more reliably identify the necessity of starting the continuous transmission or reception operation in the first communication means, and improve the safety of the shutter device.

(Effects of Appendix 3)
According to the shutter obstacle detection system according to attachment 3, the first receiving unit is paused or the reception interval is increased until the shutter curtain closing operation is specified by the second specifying unit. Even when the power consumption of one receiving unit is reduced, after the shutter curtain closing operation is specified by the second specifying unit, the reception state of the first receiving unit is changed. Since the activation signal transmitted from the second transmitter can be quickly received by the first receiver, the safety of the shutter device can be improved.

(Effects of Appendix 4)
According to the shutter obstacle detection system according to appendix 4, even when a predetermined time has elapsed after the shutter curtain closing operation is specified by the second specifying means, only when the closing operation is specified, Since the first receiving unit is activated or the reception interval of the first receiving unit is shortened, even if the shutter curtain vibration caused by wind or the like is erroneously detected as a closing operation, the first receiving unit It is possible to prevent the reception state of the part from changing carelessly.

(Effects of Appendix 5)
According to the shutter obstacle detection system according to attachment 5, the first receiving unit is set in the intermittent reception state until the shutter curtain closing operation is specified by the second specifying unit, and the shutter is detected by the second specifying unit. When the curtain closing operation is specified, the first receiving unit is set to the reception state regardless of whether the timing of intermittent reception has arrived. Therefore, the shutter curtain closing operation is specified by the second specifying means. Until it is done, the power consumption of the first receiver can be reduced, and after the shutter curtain closing operation is specified by the second specifying means, the activation signal transmitted from the second transmitter is sent to the first receiver. Therefore, the safety of the shutter device can be improved.

DESCRIPTION OF SYMBOLS 1 Opening part 2 Guide rail 10,100 Shutter apparatus 11 Shutter accommodating part 12,101 Shutter curtain 13,102 Opening / closing machine 14,103 Automatic closing apparatus 15,104 Manual closing apparatus 16,105 Interlocking relay 17,106 Seat plate 20, 110 Fire alarm system 21, 111 Fire detector 22, 112 Disaster prevention panel 30 Shutter obstacle detection system 31, 121 Seat plate switch 32 Transmitter 32a Vibration sensor 32b, 33a Input unit 32c Display unit 32d, 33d Registration switch 32e First transmission Unit 32f first receiving unit 32g, 33g antenna 32h, 33h storage unit 32i, 33i power supply unit 32j, 33j control unit 33 receiver 33b output unit 33c display unit 33e second receiving unit 33f second transmitting unit 120 obstacle detection device 122 Signal line 23 cord reel

Claims (1)

A shutter obstacle detection system that detects an obstacle to a shutter curtain that opens and closes an opening,
An obstacle sensor that detects that an obstacle that obstructs the closing operation of the shutter curtain exists in the opening; and
A closing operation specifying means for specifying that the closing operation of the shutter curtain is activated;
First communication means having a first transmitter for wirelessly transmitting an obstacle detection state signal including information indicating an obstacle detection state by the obstacle sensor;
Second communication means having a second receiver for wirelessly receiving the obstacle detection state signal;
Control means for performing opening / closing control of the shutter curtain based on the signal received by the second communication means,
The first transmission unit starts transmission of the obstacle detection state signal when it is specified by the closing operation specifying means that the shutter curtain closing operation has been started;
Shutter obstacle detection system characterized by

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