Opening / closing device

Abstract

To provide an opening / closing device capable of easily and reliably adjusting the sensitivity of a photoelectric sensor.SOLUTION: An opening / closing device, which includes an opening / closing body, an opening / closing body control circuit that controls an opening / closing operation of the opening / closing body and various settings, a control panel that is operated to make various settings, and a photoelectric sensor that detects obstacles below the opening / closing body, is characterized such that the opening / closing body is wound up on the top of the opening / closing device, the control panel becomes difficult or impossible to operate when the opening / closing body is wound up, the opening / closing body control circuit performs closing operation limiting control which limits the closing operation of the opening / closing body based on a signal output from the photoelectric sensor, and has an automatic sensitivity setting function that can adjust the sensitivity of the photoelectric sensor without operating the control panel when the opening / closing body is open to at least a position higher than the installation position of the photoelectric sensor.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to an opening and closing device, such as a shutter device or a roller blind device, which opens and closes an opening and closing body to communicate or partition spaces. [Background technology]

[0002] Conventional inventions of this type, for example as described in Patent Document 1, include a shutter device that includes a shutter curtain that opens and closes along a guide rail, a shutter case that winds and unwinds the shutter curtain onto a winding shaft at the top, an opening / closing body control circuit that controls the opening and closing operation of the shutter curtain and various settings, a photoelectric sensor for detecting obstacles, a control panel that is operated to make various settings, and a push button switch that inputs signals to the control panel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-7764 Summary of the Invention [Problem to be solved by the invention]

[0004] In the shutter device described in Patent Document 1, the pushbutton switches on the control panel include a button for adjusting the sensitivity of the photoelectric sensor used to detect obstacles. Sensitivity adjustment is performed during initial setup after installation and also at any time thereafter when resetting the sensor. Attempting to adjust the sensitivity when the shutter curtain is closed prevents the adjustment from working properly because the beam is reflected by the shutter curtain. Given the characteristics of the photoelectric sensor, it is optimal to adjust the sensitivity when the shutter curtain is fully open. However, in the case of a shutter device like the one described in Patent Document 1, where the shutter curtain and the associated control panel are retracted together, the pushbutton switch cannot be operated. Even if the control panel is not retractable, it becomes an obstacle when the shutter curtain is fully retracted, making it difficult to operate the button. For this reason, currently, the sensitivity adjustment button is operated when the shutter curtain is raised to a position higher than the position where the photoelectric sensor is installed, which makes it cumbersome to simultaneously operate the shutter curtain and the push button switch, and also poses the problem of not being able to adjust the sensitivity at the optimal position.

[0005] The present invention addresses these problems and aims to provide an opening and closing device that allows for easy and reliable adjustment of the sensitivity of the photoelectric sensor and does not cause malfunction of the shutter device. [Means for solving the problem]

[0006] In order to achieve this object, the technical means according to the present invention comprises at least the following configuration.

[0007] An opening and closing device comprising: an opening and closing body that opens and closes to communicate or separate spaces; an opening and closing body control circuit that controls the opening and closing operation of the opening and closing body and various settings; a control panel that is operated to make various settings; and a photoelectric sensor that detects obstacles below the opening and closing body, wherein the opening and closing body is wound up on the top of the opening and closing device, and the control panel becomes difficult or impossible to operate when the opening and closing body is wound up, and the opening and closing body control circuit performs closing operation limiting control that limits the closing operation of the opening and closing body based on a signal output from the photoelectric sensor, and is characterized by having an automatic sensitivity setting function that can adjust the sensitivity of the photoelectric sensor without operating the control panel when the opening and closing body is open to at least a position higher than the installation position of the photoelectric sensor. [Effects of the Invention]

[0008] By virtue of these characteristics, the present invention has the following advantages. It is possible to provide an opening and closing device that can easily and reliably adjust the sensitivity of a photoelectric sensor appropriately and that does not cause malfunction of a shutter device. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a front view showing an example of an opening / closing device according to the present invention, illustrating the internal structure of a storage section. [Figure 2] FIG. 2 is a cross-sectional view taken along the line (I)-(I) in FIG. [Figure 3] FIG. 2 is a front view showing an example of a control panel. [Figure 4] 1 is a system configuration diagram showing an example of an opening and closing device according to the present invention. [Figure 5] FIG. 10 is a diagram showing the operation and operation flow when the opening and closing device is initially set up (reset). [Figure 6] FIG. 10 is a diagram showing the operation and operation flow when the opening and closing device is initially set up (reset). [Figure 7] FIG. 10 is a diagram showing the operation and operation flow when the opening and closing device is initially set up (reset). DETAILED DESCRIPTION OF THE INVENTION

[0010] An example of an embodiment of a switching device according to the present invention will be described below with reference to the drawings. However, the drawings below have been created for the purpose of explanation, and for the sake of clarity, components not necessary for the explanation may be intentionally omitted. Furthermore, components may be intentionally shown larger or smaller for the purpose of explanation, and the drawings are not drawn to an accurate scale. In the following description, the same reference numerals in different drawings indicate parts with the same function, and duplicate explanations in each drawing will be omitted as appropriate.

[0011] <Embodiment> (Device configuration and hardware configuration of switchgear) Fig. 1 is a front view showing an example of an opening and closing device according to the present invention, showing the internal structure of the storage section. Fig. 2 is a cross-sectional view taken along line (I)-(I) in Fig. 1. Fig. 3 is a front view showing an example of a control panel. In the following description, "thickness direction of the opening / closing body" refers to the thickness direction of the opening / closing body in the closed state. Furthermore, "width direction of the opening / closing body" refers to a direction that is approximately perpendicular to the opening / closing direction of the opening / closing body, but is not the thickness direction of the opening / closing body. Furthermore, "opening / closing direction of the opening / closing body" refers to the direction in which the opening / closing body slides to separate or open a space.

[0012] As shown in FIG. 1, the opening / closing device A includes an opening / closing body 10 that opens and closes to communicate or partition a space; guide rails 20, 20 that guide the opening / closing body 10 in the opening / closing direction on both sides of the width; a storage section 30 that stores and extends the opening / closing body 10 on the opening side; a photoelectric sensor 40 (light emitter 41, light receiver 42) that non-contactly detects obstacles below the opening / closing body 10; and an operating unit 50 that issues operation commands related to the opening and closing of the opening / closing device A. The opening and closing operation of the opening / closing body 10 is controlled by a control panel 35 and an opening / closing body control circuit 350 (not shown in FIGS. 1 to 3) in the storage section 30, constituting a shutter device that is attached to a structure with a relatively wide opening, such as a garage or factory. The opening / closing device A and the operating unit 50 are connected by a cable (not shown). In addition, a remote control that issues operation commands related to opening and closing via wireless communication may also be included as a component of the system. The opening / closing body 10 comprises an opening / closing body main body 10a formed by connecting multiple slats 11, each formed by bending a horizontally elongated, approximately rectangular metal plate, so that the slats can rotate between adjacent slats above and below, and a seat plate member 10b connected to the closing direction end of the opening / closing body main body 10a and abutting against the target contact area when fully closed, and the upper ends of the multiple slats 11 are fixed to the outer periphery of the winding body 32.

[0013] The guide rails 20 are provided on both sides of the opening / closing body in the width direction, and are formed in an elongated shape spanning between the area that the opening / closing body 10 comes into contact with when fully closed (for example, the ground or floor surface) and the storage section 30. Each guide rail 20, 20 surrounds the end of the opening / closing body 10 in the width direction with a concave cross section, guiding it in the opening / closing direction.

[0014] The storage section 30 is provided with, within a storage case 31, a winding body 32 that winds up and unwinds the opening / closing body 10, a fixed shaft 33 that rotatably supports the winding body 32 from inside, an opening / closing mechanism 34 that is supported integrally with the fixed shaft 33 and transmits rotational force to the winding body 32, an opening / closing body control circuit 350 (not shown in Figures 1 to 3) that is integrally formed with the fixed shaft 33 and controls the opening / closing mechanism 34, a control panel 35 that is operated to make various settings, a load sensing means 342 (not shown in Figures 1 to 3) that senses the load on the opening / closing body 10 during the opening operation, and an opening / closing position recognition means (not shown) that recognizes the position of the opening / closing body 10 in the opening / closing direction.

[0015] 1 and 2, the storage case 31 is a hollow box-shaped member that is long in the width direction of the opening / closing body, and has an opening 31a on its lower wall that is long in the width direction of the opening / closing body, and the opening / closing body 10 is inserted through this opening 31a. When the opening / closing body 10 is wound around the winding body 32 and pulled into the opening 31a, the seat plate member 10b abuts against the vicinity of the opening 31a at the bottom end of the storage case 31 (hereinafter referred to as the lintel portion).

[0016] The lower wall surface of this storage case 31 is provided with an inspection hatch 31b that is opened and closed by a lid member. The inspection hatch 31b is located below the control panel 35 and is formed to a size that allows the opening and closing machine 34, the control panel 35, etc. to pass through.

[0017] The winding body 32 comprises a plurality of rod-shaped members 32a arranged approximately parallel to each other at intervals in the circumferential direction around a fixed shaft 33, and a plurality of support plates 32b arranged at intervals in the width direction of the opening / closing body to support these rod-shaped members 32a, and is configured in an approximately cylindrical cage shape that can rotate around the fixed shaft 33.

[0018] Each rod-shaped member 32a is made of a hard material such as metal and has a long shaft or cylindrical shape. The rod-shaped members 32a are located at approximately the same radial distance from the center of the fixed shaft 33. The space between two circumferentially adjacent rod-shaped members 32a functions as a through-hole 32c that penetrates the outer periphery of the winding body 32 in the radial direction. The size of this through-hole 32c, in other words, the width between the adjacent rod-shaped members 32a, is set so that the control panel 35 can pass through.

[0019] The support plate 32b is a substantially disk-shaped member that fits and supports the rod-shaped member 32a on its outer periphery, and its central portion is rotatably supported on the fixed shaft 33 via a bearing or the like.

[0020] The fixed shaft 33 is made of a hard material such as metal and has a long cylindrical or columnar shape, is inserted through the center of the winding body 32, and both ends of the fixed shaft 33 are fixed non-rotatably to the storage case 31 via brackets or the like (not shown).

[0021] The opening / closing machine 34 is a DC or AC rotary motor whose rotation speed can be switched, and its output rotation shaft is fixedly supported on the fixed shaft 33 with the output rotation shaft being approximately parallel to the fixed shaft 33. The rotational force of the output rotation shaft of the opening / closing machine 34 is transmitted to the winding body 32 by a drive rotation part 34c. The switch 34 rotates at a plurality of different rotational speeds in response to a command from a switch body control circuit 350 (not shown in FIGS. 1 to 3). The means for changing the rotational speed of the switch 34 may be, for example, a well-known speed control circuit such as an inverter or other power waveform conversion circuit.

[0022] As shown in Figure 2, the control panel 35 is provided in the space inside the winding body 32, and is equipped with an opening / closing body control circuit 350 (not shown in Figures 1 to 3) inside the case 35a, which consists of a microcomputer, relays, a memory device that stores various control information, data, control history, programs, etc., and a communication unit that receives operation signals from the operation unit 50, and executes a pre-stored program. The opening / closing body control circuit 350 and the opening / closing device 34 are disposed in the storage case 31 on one side in the width direction of the opening / closing body (on the right side in the example of FIG. 1).

[0023] As shown in FIG. 2, the case 35a (specifically, the main body case portion 35a2) is located on the opposite side of the opening / closing device 34 in the radial direction, with the fixed shaft 33 sandwiched between the opening / closing device 34 and the case 35a. The case 35a has a main case portion 35a2 located on one side (the left side in FIG. 2) of an imaginary plane P including the center line of the fixed shaft 33, an auxiliary case portion 35a3 located on the other side (the right side in FIG. 2) of the imaginary plane P and integrated with the main case portion 35a2, and a removable lid member 35a1 that covers the front side of the main case portion 35a2. As shown in FIG. 2, the case 35a circumferentially covers part of the outer circumferential surface of the fixed shaft 33.

[0024] As shown in FIG. 3, a user interface 35b and a plurality of output terminals 35c are provided on the surface of the main body case 35a2.

[0025] A plurality of output terminals 35c are provided so as to output a plurality of pieces of control information to the outside, and are electrically connected to the control circuit of the control panel 35. An electric wire for output signals is connected to each output terminal 35c, and this electric wire is inserted into a through-hole (not shown) in the cover member 35a1 and led to the outside.

[0026] Here, the multiple pieces of control information include, for example, information indicating that the opening / closing body 10 is in the opening operation, information indicating that the opening / closing body 10 is in the closing operation, information indicating that the opening / closing body 10 is stopped in the fully open position, information indicating that the opening / closing body 10 is stopped in the fully closed position, information indicating that the opening / closing body 10 is stopped due to an abnormality, etc. These pieces of control information are associated with a plurality of output terminals 35c so that they are output from the plurality of output terminals 35c. The correspondence between the control information and the output terminals 35c is stored in the storage device of the control panel 35, and can be displayed or rewritten on the display device 35b1 in the setting mode.

[0027] As shown in FIG. 3, the user interface 35b is exposed to the outside through an opening provided in the cover member 35a1. The user interface 35b is provided with a display device 35b1, a changeover switch 35b2 (for example, a DIP switch), a mode changeover switch 35b3, an ENT switch 35b4, an ↑ switch 35b5, a ↓ switch 35b6, a registration switch 35b7, and a sensitivity adjustment switch 35b8.

[0028] In the illustrated example, the display device 35b1 is a 7-segment LED, electrically connected to an opening / closing body control circuit (not shown) inside the case 35a, and displays various control information. Other examples of the display device 35b1 include a liquid crystal display and other display devices.

[0029] The changeover switch 35b2 is a 4-bit DIP switch in the illustrated example, and is capable of outputting contact signals of a plurality of patterns according to its on / off pattern. This changeover switch 35b2 is electrically connected to an opening / closing body control circuit (not shown) inside the case 35a, and by switching the on / off pattern, the rotation speed of the opening / closing machine 34, the control depending on whether it is turned left or right, the winding direction, etc. are switched. The left-right orientation is referred to as right-handed when the opening / closing device 34 and the control panel 35 are positioned to the right, as shown in Figure 1, and left-handed when the opening / closing device 34 and the control panel 35 are positioned to the left (not shown).

[0030] The mode changeover switch 35b3 is a switch used to change over between the normal operation mode and other modes, and in the illustrated example is an automatic return push button switch. The other modes include various setting modes including initial setting and resetting, and a history display mode. These multiple modes are switched each time the mode selector switch 35b3 is pressed. Note that switching from the normal operation mode to the resetting mode can also be performed by a special operation on the operation unit 50. This will be described later.

[0031] The ENT switch 35b4 is a switch used to confirm an item selected in the setting mode, to display the number of opening and closing operations in the normal operation mode, and to display the history in the history display mode. The ↑ switch 35b5 and ↓ switch 35b6 are switches for sequentially displaying selectable items in the setting mode. The registration switch 35b7 is a switch for registering the operation unit 50 capable of operating the control panel 35 in advance. The sensitivity adjustment switch 35b8 is a switch for adjusting the sensitivity of the photoelectric sensor 40 for detecting obstacles. Conventionally, this sensitivity adjustment switch 35b8 was operated during initial setup during construction and when resetting the sensitivity thereafter. In this embodiment of the present invention, an automatic sensitivity setting function is provided, so there is usually no need to operate this switch. However, the switch remains in place so that it can be used in case the automatic function malfunctions or to allow for optional sensitivity adjustment, and is configured so that an interrupt process is performed when the switch is operated.

[0032] From the viewpoint of ease of maintenance, the user interface 35b is preferably located near the inspection hatch 31b, and more preferably within the range of a horizontal cross section passing through the center of the reel 32 projected downward. Moreover, it is preferable that the various switches of the user interface 35b be located near the display device 35b1 in order to improve operability.

[0033] According to this embodiment, which uses the display device 35b1 and the various switches described above, the number of switches that can be switched by operating the switches can be increased compared to when using a rotary dip switch, for example, and the settings are easier.Furthermore, the display is easy to see due to the illumination of the LEDs that make up the display device 35b1. Furthermore, it is possible to reduce the recognition errors that tend to occur with conventional technologies that use only light-emitting diodes or buzzers, and it is possible to clearly display a wide variety of control information using 7-segment LEDs.

[0034] A label 35d is attached to the surface of the cover member 35a1 of the control panel 35, and describes how to operate and set the control panel 35, a code display section 35d1, and the like. The code display section 35d1 is an image that can be read by a code reader (including a mobile terminal such as a smartphone), and can be, for example, a QR code (registered trademark), a barcode, etc. The information in the code display section 35d1 is information related to the control panel 35 or information associated with the control panel 35.

[0035] 1, the operation unit 50 has exposed operation switches, such as an open switch 51 for opening the opening-closing body 10, a stop switch 52 for stopping the operation of the opening-closing body 10, and a close switch 53 for closing the opening-closing body 10, on the surface of a rectangular or other shaped case 54 attached to the building structure, and is equipped inside the case 54 with a control circuit and a transmitter that transmits operation signals, such as an open command, a close command, or a stop command, to the control panel 35 in response to the operation of the switches. Note that the transmission of the operation signals may be configured to be performed via a wired connection or a wireless connection. In addition to or instead of the operation unit attached to the building, a portable remote control operation unit may be provided separately.

[0036] The load sensing means 342 (not shown in FIGS. 1 to 3) is composed of a sensor that detects the current value of the opening / closing device 34 inside the storage case 31, an opening / closing body control circuit 350, a program, etc. This program includes a processing program that causes the opening / closing device 10 to perform a predetermined operation and stores an upper limit position that serves as the origin position when the opening / closing device 10 performs an opening operation, the seat plate member 10b of the opening / closing device 10 abuts against the lintel at the bottom end of the storage case 31, and the load on the opening / closing device 34 exceeds a predetermined threshold, and a processing program that stores a current value of the opening / closing device 34 corresponding to the position of the opening / closing device during the opening operation, uses the stored current value to control the opening / closing operation, and senses that a load is being applied to the opening / closing device when the detected current value is greater than the stored value.

[0037] Furthermore, the opening / closing position recognition means (not shown) may be configured to output a signal each time the opening / closing body 10 moves a predetermined amount, and recognize the integrated value of this output signal as an opening / closing body position variable indicating the position of the opening / closing body 10 in the opening / closing direction, and may be configured, for example, by a Hall sensor 343 that outputs a pulse signal each time the rotating part of the opening / closing device 34 rotates a predetermined amount, an opening / closing body control circuit 350 that integrates the pulse signal, a program, etc. Here, the opening / closing body position variable is a variable that changes depending on the position of the opening / closing body 10 in the opening / closing direction, and is stored in the memory device of the opening / closing body control circuit 350. According to this embodiment, this opening / closing body position variable increases with the closing operation of the opening / closing body 10 and decreases with the opening operation of the opening / closing body 10, but as another example, the increase / decrease relationship can be reversed.

[0038] (System configuration of switchgear) The following describes the system configuration of the switching device A from a functional viewpoint. Fig. 4 is a system configuration diagram showing an example of a switching device according to the present invention. The opening / closing device 34 is configured by a rotary electric motor and a braking mechanism. The opening / closing device 34 is provided with a hall sensor 343 that detects each position of the opening / closing body 10 from a fully closed position to a fully open position.

[0039] The opening / closing member control circuit 350 is an electronic circuit equipped with, for example, a microcomputer, and functions according to a pre-stored program. Specifically, the CPU 351 of the opening / closing member control circuit 350 receives and processes signals from the opening / closing operators 50 (open switch 51, stop switch 52, close switch 53), a close operation limit signal from the photoelectric sensor 40, and other input signals via the control panel 35, and controls the opening / closing device 34 via the motor drive circuit 341 according to the processing results. The result of the sensor state determination is communicated to the operator via the control panel 35 by the display device 35b1, other audio notification means, or external display means.

[0040] The opening / closing body control circuit 350 also executes a program for performing various setting processes in the setting mode. In particular, during initial setup for the first installation and subsequent resetting, upper and lower limit settings are performed, and load sensing learning is executed in which the load sensing means 342 stores the current value of the opening / closing device 34 according to the open / close position. Furthermore, the opening / closing body control circuit 350 executes automatic sensitivity adjustment to adjust the sensitivity of the photoelectric sensor without operating the control panel while the initial setup or resetting operations are being performed.

[0041] Next, a description will be given of the initial setting or resetting operation and manipulation executed by the opening / closing member control circuit 350. This operation includes upper and lower limit setting, load sensing learning, and automatic sensitivity adjustment.

[0042] <Operations and operation flow during initial setup (resetting)> 5 to 7 are operation and operation flow diagrams for initial setting (resetting) of the switching device. First, the operation at the time of resetting is described. In (1), it is determined whether or not a special operation has been performed on the operation unit 50 (for example, pressing the open switch 51 and the close switch 53 while pressing the stop switch 52), and if such an operation has been performed, the resetting mode is entered. When performing operations using the remote control, the operations are the same as those performed on the operation unit 50 (on the remote control, simultaneous operation of the open switch and the close switch is assigned as a registered button. The same applies to subsequent operations).

[0043] Next, after the mode switching in (1) above, or during initial setup during construction, the open switch 51 of the operating unit 50 is pressed as shown in (2). The opening / closing body control circuit 350 issues a continuous lift command to the motor drive circuit 341 to continuously lift the opening / closing body 10. If the opening / closing body 10 stops because the pressing time was insufficient to issue the continuous lift command, the open switch 51 is pressed again for a longer time.

[0044] When the opening / closing body 10 performs an opening operation, and the seat plate member 10b of the opening / closing body 10 abuts against the lintel at the bottom end of the storage case 31 as shown in (3), and the load on the opening / closing device 34 exceeds a predetermined threshold, the opening / closing body control circuit 350 stops the opening operation of the opening / closing body 10 and sets the value of the opening / closing body position variable corresponding to the origin (upper limit) position at the time of this stop. Specifically, the opening / closing body position variable is reset to an initial value (for example, 0 pulses). After this, the opening / closing body control circuit 350 sets the fully open position value (number of pulses). Specifically, a predetermined closing operation amount (number of pulses) is added to the initial value to return the opening / closing body 10 toward the closed position by a predetermined return amount. Then, a fully open position value is set, indicating a position closer to the closing direction than the load sensing position. This fully open position value is used as a threshold for stopping the opening / closing body 10 at the fully open position during an opening operation in normal operation mode. With this configuration, the position where the seat plate member 10b is lowered by the closing operation amount from the state in which it is tightened against the lintel portion becomes the fully open position where the opening / closing body 10 stops during an opening operation in normal operation mode. Therefore, excessive tightening force applied to the opening / closing body 10 during a normal opening operation can be reduced. The return amount can be changed on the control panel 35.

[0045] Next, as shown in (4), the closing operation of the opening-closing body 10 is started based on the operation of the close switch 53 by the operator, etc. Then, the opening-closing body control circuit 350 waits for the closing operation of the opening-closing body 10 to stop based on the operation of the stop switch 52 by the operator, etc.

[0046] As shown in (5), the operation is stopped by pressing the stop switch 52 when the operator visually confirms that the opening / closing body 10 is fully closed. The operation can also be stopped automatically by detecting a load, etc. In other words, if the stop switch 52 is not operated, the operation will naturally stop automatically.

[0047] Next, as shown in (6), the fully closed position value is set. To do this, the open switch 51 and the close switch 53 are pressed while pressing the stop switch 52. The opening / closing body control circuit 350 stores the opening / closing body position variable at the time of this stop (the pulse value that increases from the home position value in accordance with the amount of closing operation of the opening / closing body 10) in the storage device as the fully closed position value indicating that the opening / closing body 10 is in the fully closed position. The fully closed position value is used as a threshold value for stopping the opening / closing body 10 at the fully closed position during the closing operation in the normal operation mode.

[0048] Thereafter, as shown in (7), the control program executes the automatic opening operation of the opening / closing body 10. During the execution of the automatic opening operation, load sensing learning is also executed in which the load sensing means 342 memorizes the current value of the opening / closing device 34 corresponding to the open position. The memorized current value is used as an index of the optimal current value to be applied to the motor drive circuit 341 for each open position during the continuous opening operation in the normal operation mode, and is also used to sense that the opening / closing device is under load when the detected current value is greater than the memorized value.

[0049] The automatic opening operation stops when the opening / closing body 10 rises to the fully open position set in (3) above. After that, the opening / closing body control circuit 350 performs the same sensitivity adjustment as when the sensitivity adjustment switch 35b8 is pressed. In other words, the sensitivity adjustment is performed automatically even though the operator has not actually pressed the sensitivity adjustment switch 35b8. As mentioned above, sensitivity adjustment was previously performed during initial setup after installation. For example, when initially raising the opening / closing body 10 to set the origin (upper limit) position, the opening / closing body 10 was stopped and the sensitivity adjustment button was operated once the opening / closing body reached a position higher than the photoelectric sensor installation position. However, this operation was sometimes forgotten, resulting in problems such as the photoelectric sensor 40 being constantly in a detecting state or being unable to detect. Furthermore, the previous sensitivity adjustment was performed at a position far from the fully open position, which was not optimal. According to this embodiment, sensitivity adjustment is performed automatically, so there is no risk of forgetting to adjust the sensitivity. Furthermore, because sensitivity adjustment is performed at the fully open position, the adjustment is optimally performed.

[0050] After the automatic sensitivity adjustment is completed, the automatic closing operation of the opening / closing body 10 is executed as shown in (8). During the execution of the automatic opening / closing operation, load sensing learning is also executed in which the load sensing means 342 memorizes the current value of the opening / closing device 34 corresponding to the closed position. The memorized current value is used as an index of the optimal current value to be applied to the motor drive circuit 341 for each closed position during the continuous closing operation in the normal operation mode, and is also used to sense that the opening / closing device is under load when the detected current value is larger than the memorized value.

[0051] Finally, as shown in (9), a buzzer sounds to notify the operator that the initial setting (resetting) is complete, and the initial setting (resetting) is completed. The above-described operations and operation flow are merely examples. For example, the operation of the operation unit 50 or the remote control for switching to the setting mode may be different from that described here. The period and timing for automatic sensitivity adjustment may also be changed. For example, the period may be after automatic opening is stopped for setting the origin (upper limit) position, rather than after automatic opening is stopped for load learning. The timing may also be near the fully open position, rather than at the fully open position. In this case, the opening / closing body 10 may be stopped temporarily near the fully open position. Automatic sensitivity adjustment may also be performed in a region where the opening / closing body 10 decelerates before reaching the fully open position during ascent. Furthermore, automatic sensitivity adjustment may be performed when the opening / closing body 10 rises to a position higher than the photoelectric sensor location, rather than near the fully open position.

[0052] (Automatic sensitivity adjustment function to accommodate changes over time) Although sensitivity adjustment of the photoelectric sensor is naturally necessary at the time of initial installation, it may deviate from the appropriate sensitivity due to changes over time. Therefore, sensitivity adjustment must be performed periodically, and users are required to operate the sensitivity adjustment switch 35b8 periodically. However, it is possible to forget to do this for a long period of time. Therefore, the opening / closing member control circuit 350 according to the embodiment of the present invention is pre-programmed to execute the automatic sensitivity setting function every time a predetermined period of time elapses.

[0053] Here, the lapse of a predetermined period of time may be determined by executing the automatic sensitivity setting function when the number of operations of the opening / closing body 10 reaches a specific number (for example, 100 times) or when a specified time (for example, 1200 hours) has passed since the previous execution of the automatic sensitivity setting function. Alternatively, the time during which the opening / closing body 10 has been operated may be accumulated and stored, and the automatic sensitivity setting function may be triggered when this time reaches a specific time.

[0054] The timing of execution may be after the opening / closing body 10 has stopped at the fully open position for automatic opening, or automatic sensitivity adjustment may be performed in a region where the opening / closing body 10 is decelerating before reaching the fully open position during ascent. By configuring the automatic sensitivity setting to be performed periodically in this manner, optimum sensitivity can be maintained, and high-quality functionality of the switching device can be maintained.

[0055] <Summary> As described above, the above embodiment discloses the following inventions. (1) An opening and closing device comprising an opening and closing body that opens and closes to communicate or separate a space, an opening and closing body control circuit that controls the opening and closing operation of the opening and closing body and various settings, a control panel that is operated to perform various settings, and a photoelectric sensor that detects an obstacle below the opening and closing body, wherein the opening and closing body is wound up on the upper part of the opening and closing device, and the control panel becomes difficult or impossible to operate when the opening and closing body is wound up, and the opening and closing body control circuit performs closing operation limiting control that limits the closing operation of the opening and closing body based on a signal output from the photoelectric sensor, and has an automatic sensitivity setting function that can adjust the sensitivity of the photoelectric sensor without operating the control panel when the opening and closing body is open at least to a position higher than the installation position of the photoelectric sensor. An opening and closing device characterized by the above (see Figures 5 to 7). (2) The opening / closing body control circuit has a limit setting mode for setting a fully open position and a fully closed position of the opening / closing body, and the automatic sensitivity setting function is executed in the limit setting mode. The opening and closing device according to (1) is characterized in that (see Figs. 5 to 7). (3) The limit setting mode is a mode in which load sensing learning of the motor that drives the opening / closing body is performed during its execution, and the automatic sensitivity setting function is executed during the load sensing learning operation. The opening and closing device according to (2) is characterized in that (see FIG. 7). (4) The opening / closing body control circuit executes the automatic sensitivity setting function every time a predetermined period of time elapses. The opening and closing device according to any one of (1) to (3) (see paragraphs 52 to 54). (5) The predetermined period of time has elapsed when the number of operations of the opening / closing body reaches a specific number. The opening and closing device according to (4) (see paragraph 53) (6) The predetermined period of time is the time when a specified time has elapsed since the automatic sensitivity setting function was executed. The opening and closing device according to (4) (see paragraph 53) (7) The sensitivity adjustment by the automatic sensitivity setting function is performed near the fully open position of the opening / closing body. The opening and closing device according to any one of (1) to (6) (see Figs. 5 to 7).

[0056] Although different from the embodiments, the following invention can also be conceived from this specification. an opening / closing device comprising an opening / closing body that opens and closes to communicate or separate spaces; an opening / closing body control circuit that controls the opening / closing operation of the opening / closing body and various settings; a control panel that is operated to make various settings; and a photoelectric sensor that detects obstacles below the opening / closing body, wherein the opening / closing body control circuit performs closing operation limiting control that limits the closing operation of the opening / closing body based on a signal output from the photoelectric sensor, the opening / closing body control circuit has a limit setting mode that sets the fully open position and fully closed position of the opening / closing body, and has an automatic sensitivity setting function that can adjust the sensitivity of the photoelectric sensor without operating the control panel, and the automatic sensitivity setting function performs automatic sensitivity setting in the limit setting mode. This invention is not limited to opening and closing devices in which it becomes difficult or impossible to operate the control panel when the opening and closing body is wound up, but also widely includes other opening and closing devices such as overhead doors. The problem that the necessary sensitivity adjustment may be forgotten during the initial setup after installation is also common to such opening and closing devices. In other words, performing automatic sensitivity adjustment during limit setting as shown in Figures 5 to 7 is highly significant even for opening and closing devices in which the control panel is not wound up on the opening and closing body.

[0057] Although the embodiments of the present invention and opening / closing devices according to other inventions have been described in detail above with reference to the drawings, the specific configurations are not limited to these embodiments, and design changes within the scope of the present invention are also included. For example, in this embodiment, the automatic sensitivity adjustment function is configured to be performed during load sensing learning, which is executed in conjunction with setting the upper and lower limits. However, the load sensing learning may be configured to be executed at times other than when the upper and lower limits are set, and automatic sensitivity adjustment may be performed during the load sensing learning. Alternatively, load sensing learning may not be performed when setting the upper and lower limits, and automatic sensitivity adjustment may be performed when setting the upper limit. Furthermore, although this embodiment has been described as a device in which an opening / closing device equipped with a control panel is rolled up together with a shutter curtain, even if the control panel is not rolled up on the shutter curtain, and the rolling portion of the shutter curtain makes it difficult to access the control panel, this invention still falls within the scope of the present invention. [Explanation of symbols]

[0058] 10: Opening and closing body 11: Slat 20: Guide rail 30: Storage area 34: Opening and closing machine 341: Motor drive circuit 342: Load sensing means 343: Hall sensor 35: Control panel 350: Opening and closing body control circuit 351:CPU 40: Photoelectric sensor 41: Floodlight 42:Receiver 50: Operation unit (operators for opening / closing, etc.)

Claims

1. An opening and closing device comprising: an opening and closing body that opens and closes to communicate or separate a space; an opening and closing body control circuit that controls the opening and closing operation of the opening and closing body and various settings; a control panel that is operated to perform various settings; and a photoelectric sensor that detects an obstacle below the opening and closing body, The opening / closing body is wound around an upper portion of the opening / closing device, The control panel is difficult or impossible to operate when the opening / closing body is wound up, The opening / closing body control circuit performs a closing operation limiting control that limits the closing operation of the opening / closing body based on a signal output from the photoelectric sensor, and has an automatic sensitivity setting function that can adjust the sensitivity of the photoelectric sensor without operating the control panel when the opening / closing body is open to a position higher than the position where the photoelectric sensor is installed. A switching device characterized by:

2. The opening / closing body control circuit has a limit setting mode for setting a fully open position and a fully closed position of the opening / closing body, The automatic sensitivity setting function is executed in the limit setting mode. The opening and closing device according to claim 1 .

3. The limit setting mode is a mode in which load sensing learning of the motor that drives the opening / closing body is performed during the execution of the limit setting mode. The automatic sensitivity setting function is executed during the load sensing learning operation. The opening and closing device according to claim 2 .

4. The opening / closing body control circuit executes the automatic sensitivity setting function every time a predetermined period of time elapses. The opening and closing device according to claim 1 .

5. The predetermined period of time has elapsed when the number of operations of the opening / closing body reaches a specific number. The opening and closing device according to claim 4 .

6. The predetermined period of time is the time when a specified time has elapsed since the automatic sensitivity setting function was executed. The opening and closing device according to claim 4 .

7. The sensitivity adjustment by the automatic sensitivity setting function is performed near the fully open position of the opening / closing body. The opening and closing device according to claim 1 .

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