JP4359706B2 - Security shutter system - Google Patents

Description

  The present invention relates to a security shutter system that detects the lifting of a shutter, further threatens and repels an intruder, and prevents the intruder from entering the room.

Conventionally, theft has frequently occurred in which a jack or a bar is inserted into the gap below the seat plate portion of the shutter, the seat plate is lifted, and the interior is taken indoors to steal money.
In order to prevent such theft, a security shutter system that detects that the seat plate portion of the shutter has been lifted is known. That is, as shown in FIG. 9, an obstacle detector (displacement detecting means) 604 is provided on the seat plate 602 of the shutter curtain 600 constituting the security shutter system. When the shutter curtain 600 is lowered, the obstacle detection is performed. The operation switch (displacement detection means) 606 of the device 604 is turned on, the switch M is stopped, and the fully closed state is entered. When the seat plate 602 is lifted in the fully closed state, the operation switch 606 is turned off, the obstacle sensor 604 transmits a sensing signal, and the receiver (displacement detecting means) 608 receives the sensing signal, the control unit 610 A crime prevention signal is output externally (see Patent Document 1 below).
JP 2000-73679 A

However, in the security shutter system, when the shutter curtain is closed, the obstacle detector is positioned near the floor surface. For this reason, if the floor surface is flooded during heavy rain or a typhoon, or if the seat plate collides violently with the floor surface, the obstacle sensor is a precision part, so there is a risk of failure or damage. If the obstacle sensor breaks down or is damaged, the original crime prevention function will not work.
In addition, since the displacement detection means is configured to detect the vibration of the shutter curtain, the displacement detection means detects even if the shutter curtain vibrates due to wind pressure or the like. It becomes a problem that causes operation.

  In view of the above circumstances, the present invention provides a security shutter system that can prevent failure or breakage due to external action such as flooding or impact, and can prevent malfunction and enhance the security function. The purpose is to do.

The invention according to claim 1 has a plurality of slat portions connected to each other along the vertical direction, and a seat plate portion connected to the lowermost slat portion among the plurality of slat portions. a shutter for opening and closing the opening, provided at a position of a predetermined height, the bending that occurs when the seat plate portions及 beauty the seat plate portions I accompanied the movement of the slat portions at the connection portion of the slat section and a detecting means for detecting the bending generated at the connection portion of the slat portions coupled in a vertical direction, was closed, the detecting means, said slat portions located in the vicinity of the seat plate portion and the seat plate portions And a light receiving portion that receives light reflected by the slat portion located in the vicinity of the seat plate portion and the seat plate portion, and the light received by the light receiving portion. The amount of received light is in the state where the shutter closes the opening. When the reference value that is the amount of light received by the slat portion positioned near the seat plate portion and the seat plate portion varies, the connection portion between the seat plate portion and the slat portion changes. The present invention is characterized in that the generated bending and the bending generated at the connecting portion between the slat portions connected in the vertical direction are detected .

According to the first aspect of the present invention, when the shutter is lifted with the shutter closed, the shutter moves upward. At this time, the seat plate part and / or the slat part also move, and the bending accompanying the movement is detected by the detecting means. Thereby, it is possible to notify the user of an abnormality of the shutter, and the crime prevention function can be enhanced.
In addition, since the detection means is provided at a predetermined height, it is possible to prevent the detection means from being broken or damaged due to flooding of the floor surface or impact generated when closing the shutter.
Furthermore, since the shutter is not lifted by a natural action such as a strong wind or an earthquake and the seat plate portion and / or the slat portion is not bent, the detection means detects a bend accompanying the movement of the seat plate portion or / and the slat portion. There is nothing to do. Thereby, malfunction caused by natural action can be prevented.
In this specification, “bending accompanying movement” means that in an electric or self-weighting type shutter, when the seat plate or slat is lifted, the shutter tries to move upward, Since the take-up drum (corresponding to the upper part of the winding in the embodiment) does not rotate, the shutter hardly moves upward, and only one or a plurality of slat portions are bent and inclined, meaning the bent and inclined shape of this slat portion It is.

According to a second aspect of the present invention, in the security shutter system according to the first aspect of the present invention, the detecting means is a slat portion connected in a bent and vertical direction generated at a connecting portion between the seat plate portion and the slat portion. A detection signal is output when a bend occurring at a connecting portion between the two is detected, and control means for lowering the shutter based on the detection signal of the detection means is provided.

  According to the invention described in claim 2, the shutter is lowered by the control means based on the detection signal of the detection means. Thereby, an opening part can be closed with a shutter and an intruder can be prevented from entering the room. In addition, the intruder can be threatened and repelled by the falling sound generated when the shutter descends and collides with the floor surface.

  According to a third aspect of the present invention, in the security shutter system according to the second aspect, a shutter moving means for moving the shutter in the vertical direction so as to open and close the opening, and a driving means for operating the shutter moving means. The control means controls the driving means based on a detection signal of the detection means.

  According to the third aspect of the present invention, when the drive unit is controlled by the control unit based on the detection signal from the detection unit, the shutter moving unit is actuated to move the shutter downward, thereby opening the opening portion. Can be closed. Thereby, a crime prevention function can be improved.

According to a fourth aspect of the present invention, in the security shutter system according to the second or third aspect of the present invention, the security shutter system includes at least one of a sound output unit that outputs a predetermined sound and a light output unit that emits light. , based on a detection signal of said detecting means, instead of the control of or the drive unit together with the control of the drive means, is also allowed to output a warning from the sound output unit that emit light before Symbol beam emitting unit Features.

  According to the fourth aspect of the present invention, the sound output means and / or the light emission means are controlled by the control means based on the detection signal of the detection means, and an alarm is output from the sound output means or / and from the light emission means. Light is emitted. At the same time, when the driving unit is controlled based on the detection signal of the detecting unit, the shutter is moved downward and the opening is closed. As a result, the intruder can be threatened and repelled, and the intruder can be prevented from entering the room.

Invention according to claim 5, in security shutters system according to any one of claims 2 to 4, wherein the detecting means is within the variation of the detected amount of a predetermined time from the previous SL reference value When it is determined that the detection signal is stable, the detection signal is not output from the detection means.

  According to the invention described in claim 5, the detection means stores the detection amount from the seat plate part and / or the slat part in the state where the shutter closes the opening as the reference value, and detection from the reference value When it is determined that the amount fluctuation is stable within a predetermined time range, no detection signal is output from the detection means. In this way, for example, even when an object is accidentally placed near the seat plate part and / or slat part of the shutter and the detection amount at the detection means fluctuates temporarily, no detection signal is output from the detection means. This prevents malfunction of the security shutter system.

  According to a sixth aspect of the present invention, in the security shutter system according to the fifth aspect, the detection means updates the detected amount after fluctuation as the reference value.

  According to the sixth aspect of the present invention, the detection means updates the detected amount after fluctuation as the reference value, so that it is not necessary to reset the reference value each time, and the security function of the security shutter system can be maintained.

According to a seventh aspect of the present invention, in the security shutter system according to any one of the first to sixth aspects of the present invention, the detection means is disposed on the seat plate portion and the slat portion located in the vicinity of the seat plate portion . It is characterized in that a high detection means for increasing the detection capability is provided.

  According to the seventh aspect of the present invention, since the high detection means for increasing the detection capability of the detection means is provided in the seat plate part or / and the slat part of the shutter, the detection accuracy of the detection means is increased. Can do. Thereby, the slight movement of the seat plate portion or / and the slat portion of the shutter can be detected by the detection means, and the crime prevention function can be greatly enhanced.

  The security shutter system according to any one of claims 5 to 7, wherein the detection means receives a light emitting part that emits light and light reflected by the seat plate part and / or the slat part. A light receiving unit that calculates the amount of light received by the light receiving unit, and the light reflected by the seat plate unit and / or the slat unit in a state where the shutter closes the opening. A security shutter system having a storage unit that stores the amount of received light as the reference value and a signal transmission unit that outputs the detection signal to the control unit may be used.

  According to this security shutter system, when light is emitted from the light emitting part toward the seat plate part or / and the slat part of the shutter, a part of the light is reflected by the seat plate part or / and the slat part of the shutter. The received light is received by the light receiving unit. The amount of light received by the light receiving unit is calculated by the calculation unit and compared with a reference value stored in the storage unit. If the amount of received light varies with respect to the reference value, a detection signal is output from the signal transmission unit to the control unit. Thereby, it can be easily detected that the seat plate portion or / and the slat portion of the shutter has moved.

  Further, the security shutter system may be one in which a high reflection means for increasing a light reflectance is provided on the seat plate part and / or the slat part.

  According to this security shutter system, the light receiving amount of light received by the light receiving portion of the detecting means is provided on the seat plate portion and / or slat portion of the shutter because the high reflecting means for increasing the light reflectance is provided. The detection accuracy of the detection means can be increased by increasing Thereby, even a slight movement of the seat plate portion or / and the slat portion of the shutter can be detected by the detection means, and the crime prevention function can be greatly enhanced.

According to the first aspect of the present invention, when the shutter is lifted with the shutter closed, the seat plate portion and / or the slat portion moves, and the bending associated with the movement is detected by the detecting means. Thereby, it is possible to notify the user of an abnormality of the shutter, and the crime prevention function can be enhanced.
In addition, since the detection means is provided at a predetermined height, it is possible to prevent the detection means from being broken or damaged due to flooding of the floor surface or impact generated when closing the shutter.
Furthermore, since the shutter is not lifted by a natural action such as a strong wind or an earthquake and the seat plate portion and / or the slat portion is not bent, the detection means detects a bend accompanying the movement of the seat plate portion or / and the slat portion. There is nothing to do. Thereby, malfunction caused by natural action can be prevented.

  According to the second aspect of the present invention, the shutter is lowered by the control means based on the detection signal of the detection means, so that the opening can be closed by the shutter. As a result, the intruder can be prevented from entering the room.

  According to a third aspect of the present invention, when the driving unit is controlled by the control unit based on the detection signal from the detection unit, the shutter moving unit is operated, and the shutter is moved downward to close the opening. be able to. Thereby, a crime prevention function can be improved.

  In the invention according to claim 4, since the sound output means and / or the light emission means are controlled by the control means based on the detection signal of the detection means, an alarm is output from the sound output means or / and from the light emission means. Light is emitted. At the same time, when the driving unit is controlled based on the detection signal of the detecting unit, the shutter is moved downward and the opening is closed. As a result, the intruder can be threatened and repelled, and the intruder can be prevented from entering the room.

  In the invention according to claim 5, the detection means stores the detection amount from the seat plate portion and / or the slat portion with the shutter closed as the reference value, and the detection amount from the reference value is stored. When it is determined that the fluctuation is stable within a predetermined time range, no detection signal is output from the detection means. In this way, for example, even when an object is accidentally placed near the seat plate part and / or slat part of the shutter and the detection amount at the detection means fluctuates temporarily, no detection signal is output from the detection means. This prevents malfunction of the security shutter system.

  According to the sixth aspect of the present invention, since the detection means updates the detected amount after fluctuation as a reference value, it is not necessary to reset the reference value each time, and the security function of the security shutter system can be maintained.

  In the seventh aspect of the invention, since the high detection means for increasing the detection capability of the detection means is provided in the seat plate portion or / and the slat portion of the shutter, the detection accuracy of the detection means can be increased. Thereby, even a slight movement of the seat plate portion or / and the slat portion of the shutter can be detected by the detection means, and the crime prevention function can be greatly enhanced.

  Next, a security shutter system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external view of a security shutter system, and FIG. 2 is a block diagram of the security shutter system.

As shown in FIGS. 1A, 1B, and 2, the security shutter system 10 includes a shutter 12 that opens and closes an opening, and the shutter 12 is moved upward (arrows in FIG. 1) by winding the shutter 12 around the outer periphery. A winding part (shutter moving means) 14 that moves the shutter 12 downward (in the direction of arrow B in FIG. 1) by moving it in the A direction) or rewinding from the outer periphery, and rotationally driving (actuating) the winding part 14. A drive unit (drive unit) 16 and a control unit (control unit) 18 that controls the drive unit 16 are included.
As shown in FIG. 3, the shutter 12 is configured by connecting a plurality of slats (slat portions) 15 in the vertical direction, and the slat 15 located at the lowermost portion has a seat plate (seat plate portion). 13 is attached.
Further, the winding part 14 is housed and provided in a cover member 20 located on the indoor side, and the shutter 12 hangs from a slit (not shown) formed in the cover member 20.

Here, as shown in FIGS. 1A and 1B and FIG. 2, a detector (detection means) 22 is attached to the lower surface of the cover member 20. The detector 22 includes a light emitting element (light emitting unit) 22A that emits light toward a reflective seal 24 described later, a light receiving element (light receiving unit) 22B that receives light reflected by the reflective seal 24 described later, A CPU (calculation unit) 22C that calculates the amount of light received by the element 22B, a RAM (storage unit) 22D that stores a reference value (described later) of the amount of received light, and a detection signal are transmitted to the control unit 18. And a detection signal transmission unit (signal transmission unit) 22E.
Each of these components may be provided in the housing of the detector 22 or may be provided in a plurality of parts.
A reflective seal (high reflection means, high detection means) 24 that efficiently reflects light is provided on the side surface of the seat plate 13 and the slat 15 located in the vicinity thereof facing the indoor side.
In this embodiment, the detector 22 that emits light and receives reflected light has been described as an example. However, the present invention is not limited to this, and an ultrasonic sensor or an image sensor may be used. Good. In particular, for an image sensor, a chart for increasing the contrast may be used.

  As shown in FIG. 2, a speaker (sound output means, not shown in FIG. 1) 26 that outputs a predetermined alarm (sound) is provided in the vicinity of the cover member 20. Further, a RAM (not shown in FIG. 1) 28 in which sound data such as an alarm output from the speaker 26 is stored is provided. Further, an illumination light (light emitting means, not shown in FIG. 1) 30 for irradiating the shutter 12 with strong light is provided in the vicinity of the cover member 20.

  Next, the operation of the security shutter system 10 according to the present embodiment will be described based on the flowchart shown in FIG.

  As shown in FIGS. 1 and 2, when the drive unit 16 is driven and controlled by the control unit 18, the winding upper part 14 is rotationally driven to rewind the shutter 12 wound around the outer periphery. Thereby, as shown in FIG. 3, the shutter 12 moves downward, and the opening is closed (step 100).

  Next, when the power of the detector 22 is turned on in step 120, the light emitting element 22A of the detector 22 emits light, and light is emitted from the light emitting element 22A toward the reflective seal 24. At this time, a part of the light reflected by the reflection seal 24 is received by the light receiving element 22B, the amount of received light is calculated by the CPU 22C, and the calculation result is stored in the RAM 22D as a reference value (step 140).

Next, it is determined whether or not the amount of light received by the light receiving element 22B is changed by the CPU 22C as compared with the reference value (step 160).
That is, as shown in FIG. 5, when an intruder inserts a tool such as a bar under the seat plate 13 of the shutter 12 and lifts the seat plate 13, the seat plate 13 or the slat 15 (both or only one of them). May move up). When the seat plate 13 or the slat 15 (both or only one of them) moves upward, the seat plate 13 and / or the slat 15 is inclined with respect to the vertical direction along with the movement, and the seat plate 13 and / or A bent portion is generated in the slat 15. At this time, the incident angle of the light irradiated onto the reflective seal 24 is different from the incident angle of the light irradiated onto the reflective seal 24 of the seat plate 13 and / or the slat 15 shown in FIG. When the incident angle is different from the incident angle of light, the reflection area where the light is reflected on the reflection seal 24 also changes. When the light reflection area changes, the amount of light received by the light receiving element 22B of the detector 22 also changes and fluctuates with respect to the reference value. Therefore, the CPU 22C determines that “abnormality exists”.
If the amount of light received by the light receiving element 22B of the detector 22 does not vary with respect to the reference value, the CPU 22C determines that “no abnormality”.

Next, when the CPU 22C determines that “abnormality exists”, a detection signal is output from the detection signal transmission unit 22E to the control unit 18 (step 180). When the detection signal is output to the control unit 18, the drive unit 16 is controlled by the control unit 18, and the winding unit 14 is rotationally driven in the direction in which the shutter 12 is rewound (downward), and the shutter 12 is moved down by its own weight. Descent (self-weight drop) in the direction (step 200).
When the CPU 22C determines that “abnormality exists” and outputs a detection signal to the control unit 18, the control unit 18 controls the speaker 26, and a predetermined alarm is output from the speaker 26 (step 220).
Further, when the CPU 22 </ b> C determines that “abnormality exists” and outputs a detection signal to the control unit 18, the illumination light 30 is controlled by the control unit 18, and strong light is emitted from the illumination light 30 toward the shutter 12. (Step 240).

As described above, according to the security shutter system 10 of the present invention, when an intruder tries to invade by lifting the seat plate 13, the shutter 12 falls by its own weight, so that the intruder can be prevented from entering the room. it can. Further, when the shutter 12 falls by its own weight, a large falling sound is generated when it collides with the floor surface, and the intruder can be threatened and repelled by the falling sound.
In addition, when the intruder tries to invade by lifting the seat plate 13, a predetermined alarm is output from the speaker 26, so that the intruder can be threatened and repelled by this alarm.
Further, when the intruder tries to invade by lifting the seat plate 13, strong light is emitted from the illumination light 28 toward the shutter 12, so that the intruder can be threatened and repelled by this light.

  In addition, since the detector 22 is not provided on the seat plate 13 and the detector 22 is attached to the cover member 20 positioned relatively upward, the detector 22 is broken even when the floor surface is submerged. It can be prevented from being damaged. Further, since the detector 22 is not provided on the seat plate 13, the impact when the shutter 12 descends and collides with the floor surface is not transmitted to the detector 22, and the detector is accompanied by an external action such as the lowering of the shutter 12. 22 failure / breakage can be prevented.

  Further, since the seat plate 13 of the shutter 12 does not lift due to natural action such as strong wind or earthquake, the amount of light received by the detector 22 does not fluctuate with respect to the reference value, and a detection signal is also output from the detector 22. Not. Thereby, the malfunction caused by the natural action can be prevented.

  Next, a modified example of the operation of the security shutter system 10 according to the present embodiment will be described based on the flowchart shown in FIG.

  As shown in FIGS. 1 and 2, when the drive unit 16 is driven and controlled by the control unit 18, the winding upper part 14 is rotationally driven to rewind the shutter 12 wound around the outer periphery. As a result, as shown in FIG. 3, the shutter 12 moves downward and the opening is closed (step 300).

  Next, when the detector 22 is turned on in step 320, light is emitted from the light emitting element 22 of the detector 22 toward the reflective seal 24 provided on the shutter 12. At this time, a part of the light reflected by the reflective seal 24 is received by the light receiving element 22 of the detector 22, and the amount of received light is calculated by the CPU 22C. Based on the calculation result, the CPU 22C determines whether or not the amount of received light is stable (for a fixed time) (step 340). As a result, when the CPU 22C determines that the amount of received light is stable, the calculation result is determined as a reference value (step 360). The determined reference value is stored as data in the RAM 22D (step 380).

Next, the CPU 22C determines whether or not the amount of received light has fluctuated over a predetermined time (step 400). That is, as shown in FIG. 7, when an object is accidentally placed in the vicinity of the reflective seal 24 (on the optical path), the light irradiated to the object is reflected by the object, so that the light receiving element 22B of the detector 22 Since the received light amount of the received light is larger (or smaller), the received light amount of the light received by the light receiving element 22B varies with respect to the reference value (received light amount variation time t). When the CPU 22C determines that the amount of received light has not fluctuated over a predetermined time T (t <T), the reference value stored in the RAM 22D has been changed by the CPU 22C. (Step 420). For example, in step 420, when an object is accidentally placed on the optical path, the amount of received light fluctuates with respect to the reference value for a short time t. Is intended to be updated as a reference value.
In this case, since the driving unit 16, the speaker 26, and the illumination light 30 are not controlled by the control unit 18, the shutter 12 does not descend, no alarm is output from the speaker 26, and no light is emitted from the illumination light 30.
When the reference value of the received light amount is updated in step 420, the updated reference value is stored in the RAM 22D in step 380, and thereafter, the fluctuation of the received light amount is determined by the CPU 22C based on this reference value. The

Next, as shown in FIG. 5, when an intruder inserts a tool such as a bar below the seat plate 13 of the shutter 12 and the seat plate 13 is lifted, as shown in FIG. The amount of light received by the element 22B varies over a predetermined time T (t ≧ T) (t = T is shown in FIG. 8). At this time, the CPU 22C determines that “abnormality exists”, and a detection signal is output from the detection signal transmission unit 22E to the control unit 18 (step 460). When the detection signal is output to the control unit 18, the drive unit 16 is controlled by the control unit 18, and the winding unit 14 is rotationally driven in the direction in which the shutter 12 is rewound (downward), and the shutter 12 is moved down by its own weight. Descent (self-weight drop) in the direction (step 480).
When CPU 22C determines that “abnormality exists” and a detection signal is output to control unit 18, speaker 26 is controlled by control unit 18 and a predetermined alarm is output from speaker 26 (step 500).
Further, when the CPU 22 </ b> C determines that “abnormality exists” and outputs a detection signal to the control unit 18, the illumination light 30 is controlled by the control unit 18, and strong light is emitted from the illumination light 30 toward the shutter 12. (Step 520).

  As described above, in this modification, even when an object is accidentally placed on the optical path, the object and the intruder can be distinguished. As a result, when an object is accidentally placed on the optical path, the shutter 12 does not descend, no alarm is output from the speaker 26, and no light is emitted from the illumination light 30, so the security shutter system 10 Can be prevented from malfunctioning.

(A) is a front view of the security shutter system which concerns on one Embodiment of this invention, (B) is the side view. It is a block diagram which shows the structure of the security shutter system which concerns on one Embodiment of this invention. It is a partial block diagram of the shutter which comprises the security shutter system which concerns on one Embodiment of this invention. It is a flowchart which shows the effect | action of the security shutter system which concerns on one Embodiment of this invention. It is a state figure showing the state where the shutter which constitutes the security shutter system concerning one embodiment of the present invention moved. It is a flowchart which shows the modification of an effect | action of the security shutter system which concerns on one Embodiment of this invention. It is a figure which shows the fluctuation | variation of the light reception amount in the detection means when an object is accidentally placed in the detection area. It is a figure which shows the fluctuation | variation of the light reception amount in the detection means when an intruder invades. It is a schematic block diagram of the conventional security shutter system.

Explanation of symbols

10 Security shutter system 12 Shutter 13 Seat plate (seat plate)
14 upper part (shutter moving means)
15 Slat (slat part)
16 Drive unit (drive means)
18 Control unit (control means)
22 Detector (detection means)
22A Light Emitting Element (Light Emitting Unit)
22B Light receiving element (light receiving part)
22C CPU (calculation unit)
22D RAM (storage unit)
22E Detection signal transmitter (signal transmitter)
24 Reflective seal (high reflection means, high detection means)
26 Speaker (Sound output means)
30 Illumination light (light emitting means)

Claims (7)

A plurality of slats portion connected to each other along the vertical direction, the shutter has a seat plate portion connected to the slat portion of the bottom of the plurality of the slat portions, to open and close the opening,
Provided at a position of a predetermined height, the seat plate portions及 beauty said slat portion coupled to the bending and vertical directions occurs at the connecting portion of the seat plate portions I accompanied the movement of the slat portion and the slat section Detecting means for detecting bending occurring at a connecting portion between each other ;
I have a,
The detection means includes: a light emitting unit that emits light to the seat plate portion and the slat portion located in the vicinity of the seat plate portion; and the slat portion located in the vicinity of the seat plate portion and the seat plate portion. A light receiving portion that receives the light reflected by the light receiving portion, and the amount of light received by the light receiving portion is in the vicinity of the seat plate portion and the seat plate portion with the shutter closing the opening. The slat part connected in the vertical direction and the bending generated at the connecting part between the seat plate part and the slat part when it fluctuates with respect to a reference value which is the amount of light received by the reflected slat part. A security shutter system characterized by detecting a bend that occurs at a connecting portion between each other . The detection means outputs a detection signal when it detects a bend that occurs at a connection portion between the seat plate portion and the slat portion and a bend that occurs at a connection portion between the slat portions connected in the vertical direction. Yes,
The security shutter system according to claim 1, further comprising a control unit that lowers the shutter based on a detection signal of the detection unit. Shutter moving means for moving the shutter in the vertical direction so as to open and close the opening;
Driving means for operating the shutter moving means,
The security shutter system according to claim 2, wherein the control unit controls the driving unit based on a detection signal of the detection unit. Having at least one of sound output means for outputting a predetermined sound or light output means for emitting light,
Said control means based on a detection signal of said detecting means, instead of the control of or the drive unit together with the control of the drive means, is also allowed to output a warning from the sound output means light before Symbol beam emitting unit The security shutter system according to claim 2, wherein the security shutter system emits light. Claim wherein the detecting means, when the fluctuation of the detected amount from the previous SL reference value is judged to have stabilized within a predetermined time, wherein said detection signal from said detecting means is not output The security shutter system according to any one of 2 to 4.   The security shutter system according to claim 5, wherein the detection unit updates the detected amount after fluctuation as the reference value. The high detection means which raises the detection capability of the said detection means is provided in the said slat part located in the vicinity of the said seat board part and the said seat board part, The any one of Claim 1 thru | or 6 characterized by the above-mentioned. Security shutter system.

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