JP6965187B2 - Shutter device - Google Patents

Description

The present invention relates to a shutter device.

Conventionally, in a shutter device or the like, a technique for preventing overwinding or overdescent of a closing member such as a shutter curtain has been known. Patent Document 1 and Patent Document 2 disclose this kind of technology.

According to Patent Document 1, in a chain-driven opening / closing door, an engaging member provided on the door body comes into contact with an upward movement exceeding the upper limit set height of the door body to stop the operation of the electric switch and cause an upper limit overrun. An overrun detector is provided that integrally includes one operating rod to prevent and the other operating rod that abuts with an upward movement exceeding the upper limit height of the weight to stop the operation of the electric switch and prevent the lower limit overrun. The configuration is described.

Patent Document 2 describes a seat plate attached to the lowermost part of the shutter curtain, a reflector attached to the upper surface of the seat plate, and a sensor arranged in the gusset portion to irradiate the reflector and receive the reflected light. A sensor lever whose central part is pivotally supported on the seat plate and can rotate in the vertical direction, and a block provided on the gusset part that comes into contact with the shutter curtain when it rises to the upper limit position and pushes down the end of the sensor lever. Prevention of pushing up of an electric shutter having a shielding plate fixed to the sensing lever and rotating integrally with the sensing lever to shield the reflector, and a control means for stopping the drive of the shutter curtain by an input signal of a sensor. The device is described.

Jikkenhei 03-126992 Utility Model Registration No. 2543471

By the way, in a shutter device having a configuration in which a shutter curtain is wound around a winding unit, a limit switch that operates in conjunction with the drive of the switch is arranged near the switch, and when the shutter is raised, the shutter is opened and closed with an arbitrary position set as the upper limit position. The drive of the switch is stopped, and the drive of the switch is stopped with the arbitrarily set arbitrary as the lower limit position when descending, but this is due to overwinding that drives beyond the set position by using the on / off of the limit switch. It is configured to prevent overdescent. However, if the limit switch fails, overwinding and overdescent will occur without stopping at an arbitrary position to be set, causing a problem. When the limit switch fails, it is possible to move the shutter up and down manually, but when opening and closing electrically, the user must constantly monitor the position of the shutter and open and close it, which imposes a burden on the user. Become.

In this respect, the technique described in Patent Document 1 can prevent the upper limit overrun and the lower limit overrun of the door body by the two operating rods even if the limit switch fails. However, it is necessary to provide one operating rod at a position where it comes into contact with an engaging member provided on the door body and at a position where the other operating rod comes into contact with an upward movement exceeding the upper limit height of the weight, which is mechanical. Structure is required and the layout of the device configuration is limited. Further, in the configuration in which the shutter curtain is wound up, there is no weight equivalent and it cannot be applied as it is.

Further, in the technique described in Patent Document 2, even when an abnormality occurs in a sensor switch such as a limit switch, the shielding plate that shields the reflector rotates and the sensor receives the reflected light. Therefore, although it is possible to prevent the electric shutter from being pushed up, in addition to the need for a mechanical structure in which the shielding plate rotates, it is necessary to separately provide a configuration for preventing overdescent.

An object of the present invention is to provide a shutter device capable of reliably detecting overwinding or overfalling of a shutter curtain without complicating the configuration.

In the present invention, the shutter curtain (for example, the shutter curtain 12 described later), the winding unit capable of winding the shutter curtain (for example, the winding drum 132 described later), and the winding unit are rotationally driven to drive the winding unit. A drive unit (for example, a motor 141 described later) for winding or feeding the shutter curtain and a frame (for example, a frame 40 described later) arranged in the vicinity of the winding unit are fixed to a light emitting unit and a light receiving unit (for example, a light receiving unit (described later)). For example, a light detection unit (for example, a light detection sensor 30 described later) having a light emitting / receiving surface 30a described later, and an overwinding reflection arranged on the shutter curtain and located near the door end at a closed position of the shutter curtain. A member (for example, the overwinding reflecting plates 31 and 32 described later) and an overdescent reflective member (for example, described later) arranged on the shutter curtain and located in the vicinity of the winding portion at the closing position of the shutter curtain. A control unit that determines the occurrence of an abnormality based on the over-descent reflecting plates 41, 42) and the detection signal that the light detection unit detects the light reflected by the over-winding reflecting member or the over-descent reflecting member. (For example, the control panel 15 described later) and a shutter device (for example, the shutter device 1 described later) including the same.

At least one of the overdescent reflective member and the overwinding reflective member is arranged on the back side of the shutter curtain at intervals of two or more, and the control unit is detected a plurality of times by the light detection unit. It is preferable to distinguish the degree of abnormality based on the detection signal.

It is preferable that the control unit stops driving the drive unit when the light detection unit receives the second detection signal within the reference time after receiving the first detection signal.

A notification unit (for example, a notification device 17 described later) capable of distinguishing between caution information and warning information is further provided, and when the light detection unit receives the first detection signal, the control unit provides caution information by the notification unit. If the time from the reception of the first detection signal to the reception of the second detection signal is within the reference time, the warning information is notified, and if the reference time is exceeded, the caution information is given. It is preferable to perform control to maintain the notification.

It is preferable that the control unit stops driving the drive unit when the light detection unit receives the second detection signal within a preset reference time after receiving the first detection signal.

The shutter device further includes a notification unit that notifies the degree of abnormality, and the control unit receives a second detection signal beyond the reference time after the light detection unit receives the first detection signal. Then, it is preferable to notify the caution information by the notification unit.

The shutter curtain is configured by connecting a plurality of slats (for example, slats 121 described later) in a series in the winding direction, and a recess (for example, recess 121b described later) is formed on the back side of the slats to cause the overdescent. It is preferable that at least a part of the reflective member for overwinding and the reflective member for overwinding is fixed to the inside of the recess.

It is preferable that the thickness of the overdescent reflective member or the overwinding reflective member fixed to the inside of the recess is formed to be thinner than the depth of the recess.

According to the shutter device of the present invention, overwinding and overfalling of the shutter curtain can be reliably detected without complicating the configuration.

It is the schematic of the shutter device which concerns on one Embodiment of this invention. It is a figure which looked at the state of the winding device provided in the shutter device of this embodiment and the vicinity thereof in the axial direction of a winding shaft. It is a front view of the light detection sensor held by the base plate and the sensor holder of this embodiment. It is a top view of the light detection sensor held by the base plate and the sensor holder of this embodiment. It is a figure which shows the 1st overwinding reflector and the 2nd overwinding reflector fixed to the lower part of the back side of the shutter curtain of this embodiment. It is a figure which shows the overwinding detection by the light detection sensor of this embodiment stepwise. It is a figure which shows the 1st superdescent reflector and the 2nd superdescent reflector fixed to the upper part of the back side of the shutter curtain of this embodiment of this embodiment. It is a figure which shows the overdescent detection by the light detection sensor of this embodiment stepwise. It is a block diagram which shows a part of the electric structure of the shutter device of this embodiment. It is a figure which shows stepwise overwinding detection by the light detection sensor of the modification. It is a figure which shows stepwise the overdescent detection by the light detection sensor of the modification.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a shutter device 1 according to an embodiment of the present invention. FIG. 1 shows a state in which the shutter device 1 is viewed from the back side (for example, the indoor side).

First, the overall configuration of the shutter device 1 will be described. The shutter device 1 of the present embodiment includes a guide rail 11, a shutter curtain 12, a case 20, an interlocking repeater 21, a winding device 13, a driving device 14, a control panel 15, an operating device 16, and the like. The notification device 17 and the like are included.

The guide rails 11 are arranged on the left and right sides of the shutter curtain 12. The guide rail 11 has a substantially U-shaped cross section, and guides the left and right ends of the shutter curtain 12 that moves up and down at a portion corresponding to the inside of the U-shape.

The shutter curtain 12 is configured by connecting a plurality of slats 121 in the vertical direction. The opening / closing of the building opening is performed by ascending / descending the shutter curtain 12 while being guided by the guide rail 11.

A safety device 120 is arranged at the lower end of the shutter curtain 12. The safety device 120 is for stopping the movement of the shutter curtain 12 when it detects that the lower end portion of the shutter curtain 12 has come into contact with an object.

The safety device 120 of the present embodiment detects that the long main body 123 elongated in the left-right direction, the contact portion 124 arranged below the main body 123, and the contact portion 124 are pushed into the main body 123. It includes a switch unit 125 and a cable 126 that transmits a detection signal of the switch unit 125 to the control panel 15. The control panel 15 also performs drive control of the drive device 14 based on the detection signal of the safety device 120.

When the safety device 120 detects that the lower end of the shutter curtain 12 has come into contact with an object (or the floor surface) by the safety device 120 while the shutter curtain 12 is descending, the control panel 15 stops driving the drive device 14. Take control.

The case 20 accommodates a winding device 13 and the like for winding the shutter curtain 12. The forage portion 60 is arranged below the case 20. The interlocking repeater 21 supplies power to the automatic closing device 150 until the shutter curtain 12 is fully closed via an interlocking controller (not shown) such as a sensor.

The winding device 13 is a device that winds / unwinds the shutter curtain 12. FIG. 2 is a side view showing the state of the winding device 13 and its vicinity, and the illustration of a part of the configuration of the case 20 and the like is omitted.

The take-up device 13 includes a take-up shaft 131 that is rotationally driven by the drive device 14, and a take-up drum 132 that can take up the shutter curtain 12.

Bearing brackets 135 are arranged on the left and right sides of the shutter device 1, and the take-up shaft 131 is rotatably supported on the bearing bracket 135 via a take-up drum 132 and a bearing (not shown). The axis of the take-up drum 132 coincides with the axis of the take-up shaft 131, and the take-up drum 132 rotates integrally with the take-up shaft 131. The upper end of the shutter curtain 12 is fixed to the peripheral surface of the take-up drum 132. Reference numeral 136 in FIG. 2 is a line indicating a state (maximum winding diameter) in which all the slats 121 (shutter curtain 12) are wound around the winding shaft 131.

When the take-up shaft 131 rotates in a predetermined direction (the take-up direction is the clockwise direction in FIG. 2), the shutter curtain 12 is taken up by the take-up drum 132, and the opening of the building is opened. When the take-up shaft 131 rotates in the direction opposite to the predetermined direction, the shutter curtain 12 is paid out from the take-up drum 132, and finally the opening is closed.

The drive device 14 includes a motor (drive unit) 141 as a switch and a transmission mechanism 143 that mechanically transmits the rotational force of the motor 141 to the take-up shaft 131. A limit switch 151 for detecting the end of the winding operation and the feeding operation is arranged in the vicinity of the motor 141, and the detection signal of the sensor is transmitted to the control panel 15.

The transmission mechanism 143 is wound around the motor-side sprocket 144 connected to the output shaft of the motor 141, the take-up side sprocket 145 connected to the take-up shaft 131, the motor-side sprocket 144, and the take-up side sprocket 145. A roller chain 146 and a roller chain 146 are provided. The rotational force of the motor 141 is transmitted to the take-up shaft 131 via the motor side sprocket 144, the roller chain 146, and the take-up side sprocket 145.

The control panel 15 has a control circuit that controls the drive of the motor 141 based on the signal input from the operating device 16. Further, the control panel 15 also has a circuit for outputting a detection signal or an alarm signal due to an abnormality of the shutter device 1 in addition to the control of the shutter device 1. The control panel 15 controls the timing at which the winding operation and the feeding operation in the normal state are ended based on the detection signal of the limit switch 151 attached to the motor 141 described above (see FIG. 1).

The operating device 16 is electrically connected to the control panel 15. The control panel 15 controls the operation of the shutter curtain 12 based on the operation signal of the operation device 16.

The notification device 17 is a means for notifying the user or the operator of the abnormality of the shutter device 1. The notification device 17 of the present embodiment includes a power light 171 indicating that the power is on, a warning light 172 indicating that the shutter device 1 is in an abnormal state, and a caution light 173 indicating a sign that the shutter device 1 is in an abnormal state. A cord disconnection lamp 174 indicating that a cord disconnection has occurred, and an operation enable / disable lamp 175 indicating that the shutter device 1 can be operated are provided.

Further, the shutter device 1 is configured to prevent overwinding and overdescent of the shutter curtain 12, and is fixed to the light detection sensor 30 arranged inside the magus 60 and the lower part of the back side of the shutter curtain 12. A winding reflector 31 and an overwinding reflector 32, and an overdescent reflector 41 and an overdescent reflector 42 fixed to the upper part of the back side of the shutter curtain 12 are further provided.

The photodetector 30 is a photodetector having a function of irradiating a beam and a function of detecting the reception of the beam. The light detection sensor 30 is fixed to a metal frame 40 that forms a part of the forage 60.

The frame 40 is arranged close to the take-up drum 132, and is located below the take-up drum 132. The photodetector sensor 30 is fixed to the upper surface of the frame 40 via a base plate 50 and a sensor holder 52, and is located inside the forage 60.

FIG. 3 is a front view of the photodetector sensor held by the base plate 50 and the sensor holder 52 of the present embodiment. FIG. 4 is a plan view of the photodetector sensor by the base plate 50 and the sensor holder 52 of the present embodiment.

The base plate 50 shown in FIGS. 3 and 4 is a metal fitting formed by bending a metal plate-shaped member into an L shape. In the base plate 50, two vertically long through holes 51 are formed side by side in a flat portion facing the back side of the shutter curtain 12. The sensor holder 52 is fixed to the base plate 50 by a fastening member such as a screw using the two through holes 51. Further, the support plate 53 is fixed to the opposite side of the base plate 50 to which the light detection sensor 30 is attached. On the bottom surface of the base plate 50, mounting holes 54 are formed on both sides of the support plate 53, and the base plate 50 is fastened to the frame 40 by a fastening member such as a screw using the mounting holes 54.

The sensor holder 52 holds the photodetector sensor 30 in a posture in which the light emitting / receiving surface (light emitting unit and light receiving unit) 30a is oriented in the horizontal direction. Further, the height of the sensor holder 52 can be adjusted by the vertically long through hole 51 formed in the base plate 50.

The light emitting / receiving surface 30a of the photodetector 30 faces the back side of the shutter curtain 12 by the base plate 50 and the sensor holder 52.

FIG. 5 is a diagram showing an overwinding reflector 31 and an overwinding reflector 32 fixed to the lower part of the back side of the shutter curtain 12 of the present embodiment. As shown in FIG. 5, the overwinding reflector 31 is fixed to the seat plate 122. The overwinding reflector 31 is adhesively fixed to the horizontal surface of the seat plate 122 (the finding surface on the indoor side). The overwinding reflector 31 is a thin film sealing member having an adhesive surface.

The installation location of the overwinding reflector 31 is set based on the position where the overwinding of the shutter curtain 12 occurs and the height of the light detection sensor 30. For example, when the overwinding reflector 31 is located at the height of the photodetector sensor 30 during the winding operation of the shutter curtain 12, the installation location is a position where it can be determined that overwinding has started or just before overwinding occurs. Become.

The overwinding reflector 32 is located inside the recess 121b of the slat 121. In the present embodiment, the seat plate 122 has an extension piece 122a extending upward along the back surface of the slat 121, and is on a surface of the extension piece 122a facing in the horizontal direction (founding surface on the indoor side). The overwinding reflector 32 is adhesively fixed. The overwinding reflector 32 is a plate-shaped member made of an appropriate material. The overwinding reflector 32 has a thickness that fits inside the recess 121b of the slat 121 even when it is fixed to the extension piece 122a.

The installation location of the overwinding reflector 32 is a position detected by the photodetector sensor 30 at a stage prior to the position where the overwinding of the shutter curtain 12 occurs during the winding operation. For example, when the overwinding reflector 32 is located at the height of the light detection sensor 30 during the winding operation of the shutter curtain 12, the installation location is a position that can be determined to be the pre-stage where overwinding occurs, and the overwinding reflection The plate 32 is located above the overwinding reflector 31. Therefore, when overwinding occurs during the winding operation, the overwinding reflector 32 comes to the height of the photodetector sensor 30 before the overwinding reflector 31.

The overwinding reflector 31 is installed at a position where it can detect a state in which the probability of an overwinding state is relatively high with respect to the overwinding reflector 32. Further, as shown in FIG. 1, the overwinding reflector 31 and the overwinding reflector 32 are located at the lower end of the shutter curtain 12 when viewed from the whole.

FIG. 6 is a diagram showing stepwise overwinding detection by the photodetector sensor 30 of the present embodiment. FIG. 6A shows a state in which both the overwinding reflector 31 and the overwinding reflector 32 are located below the light detection sensor 30. When the winding operation proceeds from the state of FIG. 6A and the position of the overwinding reflector 32 fixed to the shutter curtain 12 rises to the height of the light detection sensor 30 as shown in FIG. 6B. The beam irradiated by the light detection sensor 30 is reflected by the overwinding reflector 32 and returns to the light detection sensor 30. Then, the detection signal (first detection signal) of the light detection sensor 30 is transmitted to the control panel 15.

When the winding operation proceeds from the state of FIG. 6 (b) and the position of the overwinding reflector 32 fixed to the shutter curtain 12 rises to the height of the photodetector sensor 30, as shown in FIG. 6 (c). The beam irradiated by the light detection sensor 30 is reflected by the first overwinding reflector 32, and returns to the light detection sensor 30. As a result, the second detection signal of the light detection sensor 30 is transmitted to the control panel 15. Then, the detection signal (second detection signal) of the light detection sensor 30 is transmitted to the control panel 15. The detection signal detected in the state of FIG. 6 (c) shows a state in which the probability of overwinding is higher than that of the detection signal in the state of FIG. 6 (b).

FIG. 7 is a diagram showing an overdescent reflector 41 and an overdescent reflector 42 fixed to the upper part of the back side of the shutter curtain 12 of the present embodiment. As shown in FIG. 7, the upper and lower ends of the slat 121 are connecting portions 121a in which the slat 121 to be connected is fitted to each other, and a recess 121b recessed outward between the upper and lower connecting portions 121a. Is formed. The over-descent reflector 41 and the over-descent reflector 42 are both arranged inside the recess 121b of the slat 121. The slat 121 to which the over-descent reflector 41 is fixed is connected to the upper part of the slat 121 to which the over-descent reflector 42 is fixed, and the over-descent reflector 41 is attached to the over-descent reflector 42. It is located above.

The installation location of the overdescent reflector 41 is set based on the position where the overdescent of the shutter curtain 12 occurs and the height of the photodetector sensor 30. For example, when the over-descent reflector 41 descends to the height of the photodetector sensor 30 during the descent operation of the shutter curtain 12, the lower end of the shutter curtain 12 is already in contact with the ground or the floor surface, and the over-descent occurs. The installation location is a position that can be judged to be the stage where it is starting to occur or just before it begins to occur.

The location where the over-descent reflector 42 is installed is a position detected by the photodetector sensor 30 in a stage prior to the position where the shutter curtain 12 over-descent occurs during the descent operation. For example, when the over-descent reflector 42 is located at the height of the light detection sensor 30 during the descent operation of the shutter curtain 12, the installation location is a position that can be determined to be the stage before the over-descent occurs, and the over-descent reflector 42 is located below the overdescent reflector 41. Therefore, when an overdescent occurs during the descent operation, the overdescent reflector 42 comes to the height of the photodetector sensor 30 before the overdescent reflector 41.

In the present embodiment, the over-descent reflector 41 and the over-descent reflector 42 are both located at the upper part on the back side of the shutter curtain 12 in the closed position.

FIG. 8 is a diagram showing stepwise overdescent detection by the photodetector sensor 30 of the present embodiment. FIG. 8A shows a state in which both the over-descent reflector 41 and the over-descent reflector 42 are located above the light detection sensor 30. When the descent operation proceeds from the state of FIG. 8 (a) and the position of the overdescent reflector 42 fixed to the shutter curtain 12 descends to the height of the photodetector sensor 30, as shown in FIG. 8 (b). The beam irradiated by the light detection sensor 30 is reflected by the overwinding reflector 32 and returns to the light detection sensor 30. Then, the detection signal (first detection signal) of the light detection sensor 30 is transmitted to the control panel 15.

When the winding operation proceeds from the state of FIG. 8 (b) and the position of the overwinding reflector 32 fixed to the shutter curtain 12 is lowered to the height of the photodetector sensor 30, as shown in FIG. 8 (c). The beam irradiated by the light detection sensor 30 is reflected by the first overwinding reflector 32, and returns to the light detection sensor 30. As a result, the second detection signal of the light detection sensor 30 is transmitted to the control panel 15. Then, the detection signal (second detection signal) of the light detection sensor 30 is transmitted to the control panel 15. The detection signal detected in the state of FIG. 8C shows a state in which the probability of overwinding is higher than that of the detection signal in the state of FIG. 8B.

FIG. 9 is a block diagram showing a part of the electrical configuration of the shutter device 1 of the present embodiment. The flow of detecting overwinding or overdescent by the control panel 15 will be described. When the control panel 15 receives the first detection signal, it controls the notification device 17 to turn on the caution light 173.

The control panel 15 measures the time from the reception of the first detection signal to the reception of the second detection signal by the counter 35 in order to determine the degree of the abnormality of overwinding or overdescent stepwise. The location of the counter 35 is not particularly limited, and for example, the light detection sensor 30 itself may have such a function, or may be a function built into the control panel 15.

In the shutter device 1 of the present embodiment, a reference time for determining the degree of abnormality is set based on the time from the detection of the first detection signal to the detection of the second detection signal. The reference time is based on the moving speed of the shutter curtain 12, the light detection sensor 30, the overwinding reflector 31, the overwinding reflector 32, the overdescent reflector 41, the overdescent reflector 42, and the like. It is set in advance.

The control panel 15 determines the degree of abnormality based on whether or not the time from the detection of the first detection signal to the detection of the second detection signal is within the reference time. When the measurement time from the reception of the first detection signal to the reception of the second detection signal is within the reference time, it can be determined that the movement amount is larger than the assumed range and the degree of abnormality is high. In the present embodiment, when the measurement time is within the reference time, the control panel 15 controls to stop the driving of the motor 141, controls the notification device 17, turns off the caution light 173, and turns on the warning light 172.

If the measurement time from the reception of the first detection signal to the reception of the second detection signal exceeds the reference time, the movement amount is within the allowable range, but the position of the shutter curtain 12 is overwound or overdescent. Although there is a possibility that it is approaching the position of, the degree of abnormality is relatively low. In the present embodiment, when the measurement time exceeds the reference time, the caution light 173 is kept lit.

The control panel 15 can also distinguish whether the detection signal detects overwinding or overdescent based on the rotation direction of the motor 141. Therefore, the notification device 17 may be configured to notify the user by distinguishing between overwinding and overdescent.

According to the above embodiment, the following effects are obtained.
The shutter device 1 includes a shutter curtain 12, a take-up drum 132 capable of winding the shutter curtain 12, a motor 141 that rotationally drives the take-up drum 132 to wind or feed the shutter curtain 12, and a take-up drum 132. The light detection sensor 30 fixed to the frame 40 arranged in the vicinity (proximity) of the shutter curtain 12 and having the light emitting / receiving surface 30a, and the overwinding reflectors 31 and 32 arranged in the lower part (near the door end side) of the shutter curtain 12. The light reflected by the over-descent reflectors 41 and 42 arranged above the shutter curtain 12 (near the take-up drum 132) and the over-winding reflectors 31 and 32 or the over-descent reflectors 41 and 42. A control panel 15 for determining the occurrence of an abnormality based on a detection signal detected by the light detection sensor 30 is provided.

As a result, both overwinding and overdescent can be detected with a simple configuration without adding a separate mechanical configuration. Even if the limit switch 151 of the motor 141 is out of order, the light detection sensor 30 that detects the actual operation of the shutter curtain 12 can reliably detect overwinding and overfall without imposing a burden on the user, resulting in a malfunction or failure. Can be reliably prevented.

Further, in the present embodiment, two or more of the overwinding reflectors 31, 32 and the overdescent reflectors 41, 42 are arranged vertically (with an interval) on the back side of the shutter curtain 12. The control panel 15 distinguishes and determines the degree of abnormality based on the detection signals detected a plurality of times by the light detection sensor 30.

As a result, overwinding and overdescent can be detected step by step, and appropriate measures can be taken according to the degree of abnormality. In addition, although it is not necessary to make an emergency stop at this stage, signs of abnormalities that may cause a failure if left unattended can be detected, so the cause of the failure can be reliably eliminated and efficiency is reduced due to overwinding or overdescent. Can be dealt with at an early stage.

Further, in the present embodiment, the control panel 15 stops driving the motor 141 when the light detection sensor 30 receives the second detection signal within the reference time after receiving the first detection signal.

As a result, the operation of the shutter curtain 12 is stopped based on the rapid behavior of the shutter curtain 12 which is highly probable that an abnormality has occurred, so that overwinding and overdescent of the shutter curtain 12 can be prevented on the safer side. ..

Further, in the present embodiment, the shutter device 1 further includes a notification device 17 capable of distinguishing and notifying caution information and warning information. When the photodetection sensor 30 receives the first detection signal, the control panel 15 notifies the caution information by the notification device 17, and the time from receiving the first detection signal to receiving the second detection signal. If it is within the reference time, warning information is notified, and if it exceeds the reference time, control is performed to maintain the notification of caution information.

As a result, the user can quickly grasp the degree of abnormality of the shutter device 1, and take an appropriate and prompt response. For example, although it is not enough to stop the operation of the shutter curtain 12 in an emergency, a user or a maintenance worker who grasps a caution state from which an abnormality may occur in the future can take immediate action to prevent a malfunction or failure. It can be prevented in advance. In addition, when the warning information is notified, it is possible to immediately contact the maintenance worker or the like, and the time required for recovery can be shortened.

Further, in the present embodiment, the shutter curtain 12 is configured by vertically connecting slats 121 having connecting portions 121a formed on the upper and lower sides, respectively, and recesses 121b between the upper and lower connecting portions 121a on the back side of the slats 121. Is formed, and at least one part of the overwinding reflectors 31 and 32 and the overdescent reflectors 41 and 42 is fixed to the inside of the recess 121b.

As a result, the overwinding reflectors 31 and 32 and the overwinding reflectors 41 and 42 are housed inside the recesses 121b of the slats 121, so that the winding surface (shutter curtain) of the winding drum 132 is being wound or unwound. It is possible to prevent the occurrence of a situation in which the overwinding reflectors 31 and 32 and the overdescent reflectors 41 and 42 interfere with each other (the surface of 12).

Further, in the present embodiment, the thickness of the overwinding reflectors 31, 32 or the overdescent reflectors 41, 42 fixed to the inside of the recess 121b is formed to be thinner than the depth of the recess 121b.

As a result, the overwinding reflectors 31 and 32 and the overdescent reflectors 41 and 42 are wound on the winding drum 132 (of the shutter curtain 12) while the shutter curtain 12 is wound around the winding drum 132. It does not come into contact with the surface), and the overwinding reflectors 31 and 32 and the overdescent reflectors 41 and 42 can be more reliably prevented from falling off.

Next, a modified example of the above embodiment will be described. FIG. 10 is a diagram showing stepwise overwinding detection by the light detection sensor 30 of the modified example. FIG. 10A shows a state in which both the overwinding reflector 231 and the overwinding reflector 232 are located below the light detection sensor 30 and no detection signal is output. FIG. 10B shows a state in which the position of the overwinding reflector 232 rises to the height of the photodetection sensor 30 and the first detection signal is output. FIG. 10C shows a state in which the position of the overwinding reflector 231 rises to the height of the light detection sensor 30 and a second detection signal is output.

As shown in FIGS. 10A to 10C, the photodetector sensor 30 of the modified example is held by a base plate 250 having a substantially C-shaped cross section. The base plate 250 is fixed to the frame 40 so that the C-shaped opening side faces the back side of the shutter curtain 12. Further, the winding reflector 231 and the overwinding reflector 232 are both seal-shaped reflectors.

The light detection sensor 30 of the modified example is held at a position lower than the light detection sensor 30 held on the base plate 50 of the above embodiment. As shown in FIG. 10 (c), the overwinding reflector 231 that outputs the second detection signal corresponding to the position of the photodetector sensor 30 is lower than the seat plate 122 as seen in the main body 123 of the safety device 120. It is placed on the attached surface. Further, as shown in FIG. 10B, the overwinding reflector 232 for outputting the first detection signal is arranged on the seat plate 122.

FIG. 11 is a diagram showing stepwise overdescent detection by the light detection sensor 30 of the modified example. FIG. 11A shows a state in which both the over-descent reflector 241 and the over-descent reflector 242 are located above the light detection sensor 30 and no detection signal is output. FIG. 11B shows a state in which the position of the overdescent reflector 242 is lowered to the height of the photodetector sensor 30 and the first detection signal is output. FIG. 11C shows a state in which the position of the overdescent reflector 241 is lowered to the height of the light detection sensor 30 and a second detection signal is output.

The over-descent reflector 241 and the over-descent reflector 242 are both seal-shaped reflectors.
The over-descent reflector 241 and the over-descent reflector 242 of the modified example are lower than the over-descent reflector 41 and the over-descent reflector 42 because the position of the light detection sensor 30 is lower than that of the above embodiment. Fixed to the side.

In this way, the detection position of the light detection sensor 30 can be flexibly changed according to the circumstances. Further, the fixed positions of the overwinding reflector 231 and the overwinding reflector 232, the overwinding reflector 241 and the overwinding reflector 242 can also be flexibly changed according to the position of the light detection sensor 30. ..

Although the preferred embodiments and modifications of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be appropriately modified. For example, in the above embodiment, both the overwinding reflective member and the overdescent reflective member are arranged at two locations in the vertical direction, but the overwinding reflective member and the overdescent reflective member are all 3 The configuration may be such that one or more locations are arranged, or one overwinding reflective member and one overdescent reflective member may be arranged.

In the above embodiment, different types of reflectors of a plate-shaped overwinding reflector (overwinding reflector 32) and a seal-shaped overwinding reflector (overwinding reflector 31) are combined. , A plate-shaped reflecting member for overwinding may be used, or a seal-shaped reflecting member for overwinding may be used. The same applies to the over-descent reflective members (over-descent reflectors 41 and 42), and either a plate-shaped over-descent reflective member may be used, or a seal-shaped over-descent reflective member may be used. You may.

In the above embodiment, all of the overwinding reflectors 31 and 32 and the overdescent reflectors 41 and 42 are arranged side by side in the vertical direction, but the configuration is not limited to this. For the overwinding reflectors 31, 32, the overdescent reflectors 41, 42, or both, the reflectors are arranged side by side on the left and right, and the light detection sensors 30 are arranged side by side according to the position of the reflectors. May be.

In the above embodiment, the control panel 15, the operating device 16, and the notification device 17 may be arranged in the vicinity of the guide rail 11, the winding device 13, or the like, or may be concentrated in the same facility away from the shutter curtain 12. It may be a control room, a remote monitoring room geographically separated from the facility, or the like.

Further, in the above embodiment, the notification device 17 is configured to notify the state of the shutter device 1 by a plurality of indicator lights (power light 171, warning light 172, caution light 173, cord disconnection light 174). Not limited to. For example, the notification device may be configured by a sounding device such as a buzzer or a speaker, a display device for displaying an image, or a combination thereof.

Further, although the shutter device 1 described in the above embodiment is a fire shutter, it can be applied not only to a fire shutter but also to a management shutter that opens and closes on a daily basis. It can also be applied to a shutter that opens and closes in the horizontal direction instead of opening and closing vertically.

1 Shutter device 12 Shutter curtain 15 Control panel (control unit)
17 Notification device (notification unit)
30 Light detection sensor (light detection unit)
30a Light receiving / receiving surface (light receiving / receiving)
31 Overwinding reflector (overwinding reflector)
32 Overwinding reflector (overwinding reflector)
40 frames (frames)
41 Overdescent reflector (overdescent reflector)
42 Overdescent reflector (overdescent reflector)
121 Slat 121a Connecting part 121b Recessed 132 Winding drum (winding part)
141 Motor (drive unit)

Claims (6)

Shutter curtain and
A winding unit capable of winding the shutter curtain and
A drive unit that rotationally drives the take-up unit to wind or extend the shutter curtain, and a drive unit.
A light detection unit fixed to a frame arranged in the vicinity of the winding unit and having a light emitting unit and a light receiving unit, and a light detection unit.
A reflective member for overwinding, which is arranged on the shutter curtain and is located near the door end at the closed position of the shutter curtain,
An overdescent reflective member arranged on the shutter curtain and located in the vicinity of the take-up portion at the closed position of the shutter curtain.
A control unit that determines the occurrence of an abnormality based on a detection signal detected by the photodetector for the light reflected by the overwinding reflective member or the overdescent reflective member.
Shutter device equipped with. At least one of the over-descent reflective member and the over-winding reflective member is
Two or more are arranged on the back side of the shutter curtain at intervals.
The shutter device according to claim 1, wherein the control unit distinguishes and determines the degree of abnormality based on a detection signal detected a plurality of times by the light detection unit. The shutter device according to claim 2, wherein the control unit stops driving the drive unit when the light detection unit receives a second detection signal within a reference time after receiving the first detection signal. It is further equipped with a notification unit that can distinguish and notify caution information and warning information.
When the light detection unit receives the first detection signal, the control unit notifies the attention information by the notification unit.
If the time from the reception of the first detection signal to the reception of the second detection signal is within the reference time, the warning information is notified, and if the time exceeds the reference time, the notification of the caution information is maintained. The shutter device according to claim 3, wherein the control is performed. The shutter curtain is configured by connecting a plurality of slats in a winding direction.
A recess is formed on the back side of the slats.
The shutter device according to any one of claims 1 to 4, wherein at least any one of the over-descent reflective member and the over-winding reflective member is fixed inside the recess. The shutter device according to claim 5, wherein the thickness of the overdescent reflective member or the overwinding reflective member fixed to the inside of the recess is formed to be thinner than the depth of the recess.

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