JP5730478B2 - Shutter device - Google Patents

Description

The present invention relates to a shutter device having an automatic closing function of an opening / closing body.

  An opening / closing device includes an opening / closing body capable of being closed by its own weight, a braking device for braking and releasing the opening / closing body so as not to be closed by its own weight, and an automatic closing device for releasing braking of the braking device. The one with is known. An open / close device equipped with such an automatic closing device prevents the spread of fire and smoke from fire by causing the open / close body to close by its own weight by releasing the braking of the braking device when a fire occurs. It has become.

  In the one described in Patent Document 1 below, the brake release lever provided in the braking device is released in the braking release direction by moving the closing lever provided in the automatic closing device in the braking release direction. It has become. In addition, when the moving brake release operation unit turns on the micro switch, a signal indicating that the brake operation unit is pushed to the brake release position is output, and the electric motor that moves the brake release operation unit based on this signal Is controlled to stop driving.

Japanese Patent Laid-Open No. 2005-76366

  According to the prior art of Patent Document 1, it is possible to increase the accuracy of the brake release operation of the brake release operation unit by controlling the brake release operation unit to stop at the brake release position of the brake operation unit. However, since the movement amount of the brake release operation unit needs to be adjusted with high accuracy in order to prevent deformation and breakage of the brake operation unit due to excessive movement, it corresponds to the adjustment work of the movement amount of the brake release operation unit. Time and high technology are required. In addition, since the braking release position of the braking operation unit may differ depending on the braking device, the amount of movement of the braking release operation unit must be adjusted for each braking device. That is, the adjustment of the movement amount of the brake release operation unit is a factor that reduces the construction efficiency of the switchgear.

  This invention makes it an example of a subject to cope with such a problem. That is, it is possible to eliminate the need to adjust the amount of movement of the brake release operation unit, to prevent excessive movement of the brake release operation unit without adjusting the amount of movement of the brake release operation unit, It is an object of the present invention to prevent deformation and breakage of the braking operation portion by preventing the movement.

  In order to achieve such an object, the switchgear and the automatic closing control method of the switchgear according to the present invention include at least the following features.

  An opening / closing body that closes due to its own weight, a braking portion that brakes the closing operation due to its own weight, a braking operation portion that operates to release braking of the braking portion, and a brake release for the braking operation portion A brake release operation unit that operates so as to perform a load, a load change detection unit that detects a change in load that acts on the brake release operation unit during the brake release operation of the brake release operation unit, and a load change that is detected A movable limit detection unit that detects a load fluctuation at the movable limit position of the braking operation unit and outputs a movable limit signal, and a brake release of the braking release operation unit based on the output movable limit signal And a control unit that controls to stop the operation.

  An opening / closing body that closes due to its own weight, a braking portion that brakes the closing operation due to its own weight, a braking operation portion that operates to release braking of the braking portion, and a brake release for the braking operation portion A control method for an opening / closing device comprising a brake release operation unit that operates to perform the operation and a control unit that controls the operation of the brake release operation unit. A load fluctuation detecting step for detecting a fluctuation in the load acting on the release operation section, and detecting that the detected load fluctuation is a load fluctuation at the movable limit position of the braking operation section and outputting a movable limit signal. The method includes a movable limit detection step and a brake release operation stop step of stopping the brake release operation of the brake release operation unit based on the output movable limit signal.

  By having such characteristics, the present invention has the following effects. That is, when the brake release operation unit moves the brake operation unit to the movable limit position, a change in load acting on the brake release operation unit is detected, and the brake release operation unit releases the brake based on the detected load change. Since the operation is stopped, the operation amount of the brake release operation unit is adjusted to the amount of movement of the brake operation unit when the brake release operation amount of the brake release operation unit is adjusted to exceed the movable limit position of the brake operation unit. Even without adjustment so as not to exceed the limit position, the brake release operation unit can be brake-released with high accuracy. In addition, it is possible to prevent an excessive braking releasing operation of the braking releasing operation unit and prevent the braking operation unit from being deformed or damaged.

The schematic block diagram of 1st Embodiment of an opening / closing apparatus. The principal part expanded sectional view of FIG. Sectional drawing which shows the structure of an automatic closure apparatus. (4)-(4) sectional view taken on the line of FIG. Sectional drawing which shows the structure of the automatic closure apparatus of a brake release state. Sectional drawing which shows the structure of the automatic closure apparatus of other embodiment. (7)-(7) sectional view taken on the line of FIG. Sectional drawing which shows the structure of the automatic closure apparatus of a brake release state. The block diagram which shows the structure of an automatic closure apparatus. The wave form diagram which shows the electric current value fluctuation | variation from a braking state to a braking release state. The flowchart which shows the control method of a control part. The wave form diagram which shows the electric current value fluctuation | variation from the braking state of 2nd Embodiment to a braking cancellation | release state. The wave form diagram which expanded the principal part of FIG. The flowchart which shows the control method of the control part of 2nd Embodiment. The wave form diagram which shows the electric current value fluctuation | variation from the braking state of 3rd Embodiment to a braking cancellation | release state.

  The opening / closing device of the present invention is disposed in an opening or an internal space of a building or the like, and can be applied as a shutter device for opening / closing the opening or the internal space. It is effective when applied to a fire shutter device that automatically closes the space and prevents fire spread and smoke spread.

  In addition, the opening / closing device of the present invention includes a form in which the opening / closing body is wound and stored on the winding shaft, and a form in which the opening / closing body is stored on the opening direction side without being wound on the winding shaft. .

  The above-mentioned opening / closing body preferably has a fireproof function, for example, an opening / closing body formed by connecting a plurality of slats or panels made of a non-combustible material or a material that is difficult to thermally deform in the opening / closing direction. Examples thereof include an opening / closing body made of a material and made of a panel having an area capable of fully closing an opening and an internal space, and an opening / closing body made of a non-flammable, flame retardant, and fire-resistant sheet.

  As a control for detecting the movable limit position by the movable limit detection unit, for example, a load variation excluding a load variation at the start of the braking release operation unit, and a load variation exceeding a predetermined threshold is detected at the load at the movable limit position. There is a control that detects the fluctuation.

  Further, the first load fluctuation excluding the load fluctuation at the start of the brake release operation unit, which exceeds a predetermined threshold value, is detected as the first load fluctuation, and the load fluctuation after the first load fluctuation is detected. The load change during the brake release operation of the brake release operation unit is detected as the second load change, and the load change after the detection of the second load change exceeds the maximum value of the second load change. Is detected as the third load fluctuation at the movable limit position.

  Examples of other control in which the movable limit detection unit detects the movable limit position include control for detecting a load fluctuation at the movable limit position when there is a predetermined load fluctuation within a predetermined time.

  In such control, when the detected load fluctuation is a load fluctuation from a no-load state, it is preferable to perform control that does not detect the load fluctuation at the movable limit position.

  The load variation detection unit may be any component that can detect the variation of the load acting on the brake release operation unit during the brake release operation. For example, the load variation detection unit corresponds to the load variation applied to the brake release operation unit during the brake release operation. And detecting a current value that fluctuates.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The opening / closing apparatus 1 of the present embodiment will be described with respect to a form applied to a fire-proof shutter device that automatically closes an opening and an internal space to prevent the spread of fire and smoke when a fire occurs. In addition, each embodiment illustrated below shows an example of the control method of the switchgear 1 and the switchgear 1, and does not limit this invention.

  In the present embodiment, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body A1 in the closed state. The “opening / closing body width direction” means a direction orthogonal to the opening / closing direction of the opening / closing body A1 and not the thickness direction of the opening / closing body A1. In addition, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body A1 slides to open / close an opening or a space.

  Drawing 1 is a schematic structure figure of opening and closing device 1 of a 1st embodiment. The opening / closing device 1 surrounds an automatic closing device 10, an opening / closing body A1 that slides in an opening / closing body opening / closing direction (vertical direction in the drawing), and an opening / closing body width direction (left / right direction in the drawing). A guide rail A2 that guides to the side, a winding device A3 that winds and unwinds the opening and closing body A1, and a storage portion A4 that stores the winding device A3.

  The opening / closing body A1 is configured such that a plurality of slats A11 formed by bending a horizontally-long substantially rectangular fire-proof metal plate are juxtaposed in the opening / closing body opening / closing direction and rotated between adjacent slats A11. The seat plate A12 is connected to the closing direction end of the slat A11 on the closing direction end side.

  The guide rail A2 is a substantially U-shaped member that surrounds the widthwise end of the opening / closing body 1A, and a contact target portion (for example, a floor surface, the ground, a frame member, etc.) seated by the opening / closing body A1. It arrange | positions over between accommodating part A4.

  The winding device A3 includes a winding shaft A30 that winds and unwinds the opening / closing body A1, and an opening / closing device 2 that drives and rotates the winding shaft A30 via a power transmission unit A31 such as a chain and a sprocket. .

  The opening / closing machine 2 is provided with a braking device 3 that brakes the rotation of the winding shaft A30 in the closing direction due to the weight of the opening / closing body A1.

  The braking device 3 is braked at the time of standby, and is released by the automatic closing device 10. The automatic closing device 10 is controlled based on a fire signal output when a fire occurs. 3, the braking of the winding shaft A30 is released. The winding shaft A30 released from braking is rotated in the direction of closing the opening / closing body A1 by the weight of the opening / closing body A1 acting in the closing direction. The aforementioned fire signal output may be automatically output from the fire detection device when a fire occurs, or may be output artificially when a fire occurs.

  The storage portion A4 is formed in a box shape having an opening (not shown) for allowing the opening / closing body A1 to appear and disappear at the lower end, and the edge portion of the opening is the opening of the opening / closing body A1 when fully opened. It is a lintel (not shown) for contacting the seat plate member A12.

  FIG. 2 is a configuration diagram of the switch 2. The opening / closing machine 2 is built in a casing A5, and an automatic closing device 10 is attached to the upper part of the casing A5.

  As the opening / closing machine 2, for example, one having a structure disclosed in Japanese Patent Application Laid-Open No. 2009-79457 can be used. Hereinafter, the basic configuration of the switch 2 will be described. The opening / closing machine 2 of the present invention is not limited to the illustrated form (not shown).

  The opening / closing machine 2 includes a winding drive source 20 for rotating the winding shaft A30, and a braking device 3 for braking the rotation of the winding shaft A30 due to the weight of the opening / closing body A1. The winding drive source 20 is an electric motor and is a DC motor or an AC motor. A drive shaft 22 is fixed to the center of the rotor 21 of the drive source 20, and the rotational force of the drive shaft 22 is configured to be transmitted to the take-up shaft A30 via the power transmission unit A31.

  The braking device 3 includes a braking unit 4 that brakes the rotation of the winding shaft A <b> 30 and a braking operation unit 5 that releases braking of the braking unit 4.

  The braking unit 4 includes a brake shaft 40 disposed coaxially with the drive shaft 22, a brake shoe 41 fixed to the drive shaft 22, a brake drum 42 fixed to the brake shaft 40 and contacting and leaving the brake shoe 41, A coil spring 43 that biases the brake drum 42 toward the brake shoe 41 is provided.

  The braking unit 4 maintains the contact state of the brake drum 42 with respect to the brake shoe 41 by the urging force of the coil spring 43, thereby rotating the drive shaft 22 on which the rotation of the winding shaft A30 due to the weight of the opening / closing body A1 acts. It is designed to brake. Further, when the brake drum 42 is separated from the brake shoe 41 by the brake release operation of the brake operation unit 5, the braking of the drive shaft 22 on which the rotation of the winding shaft A30 due to the weight of the opening / closing body A1 acts is released. ing. Further, the drive shaft 22 is braked at the time of brake release standby, and when the drive shaft 22 is released, the winding shaft A30 rotates in the closing direction due to the weight of the opening / closing body A1, and the opening / closing body A1 is closed. Slide into the closed state.

  The braking operation unit 5 separates the brake drum 42 from the brake shoe 41 against the urging force of the coil spring 43, and is provided so that the tip projects out of the casing A5.

  The braking operation unit 5 is supported so as to swing with respect to the brake shaft 40. When a pressing force by the braking release operation unit 6 of the automatic closing device 10 is applied to a portion protruding outside the casing A5, the braking operation unit 5 is braked. The operation unit 5 is tilted in the braking release direction (right direction in the drawing in FIG. 2). Due to the tilting of the braking operation unit 5, the brake shaft 40 slides to the right in the drawing against the urging force of the coil spring 43, and the brake drum 42 moves away from the brake shoe 41 as the brake shaft 40 slides. Braking is released. Further, when the pushing operation by the brake release operation unit 6 of the automatic closing device 10 with respect to the brake operation unit 5 is released, the brake drum 40 is slid in the left direction in the drawing by the urging force of the coil spring 43, and the brake drum 42 is brought into contact with the brake shoe 41 to return to the braking state, and the braking operation section 5 that has been tilted returns to the braking state.

  The automatic closing device 10 includes a brake release operation unit 6 including a slide unit 60 that pushes the braking operation unit 5, and the slide unit 60 slides to push the braking operation unit 5 when power is supplied. Has been placed.

  3 to 5 are configuration diagrams of the automatic closing device 10. The automatic closing device 10 includes a brake release operation unit 6 and a control circuit unit 7 that controls the operation of the brake release operation unit 6, and these units are built in the casing 100. Moreover, the signal input part 200 for performing various signal inputs is provided.

  The brake release operation unit 6 includes a slide unit 60 that slidably passes through the left and right side walls 101 in the illustration of the casing 100, a drive source 61 that generates a drive force for sliding the slide unit 60, and driving of the drive source 61. And a drive transmission unit 62 that transmits the force to the slide unit 60.

  The slide portion 60 pushes the braking operation portion 5 by sliding, and includes a push portion 63 at an end protruding from the side wall 101. The slide portion 60 corresponds to a rack and pinion rack that constitutes the most downstream portion of the drive transmission portion 62, and a tooth portion 620 is formed on the upper surface portion of the slide portion 60. A stopper portion 60 </ b> A for restricting excessive sliding of the slide portion 60 protrudes from the side surface portion of the slide portion 60. In addition, a tension spring 60B is disposed across the slide portion 60 and the casing 100, and the slide portion 60 that has been slid in the braking release direction is returned to the braking direction by the biasing force of the tension spring 60B.

  The stopper portion 60 </ b> A is configured to stop excessive sliding of the slide portion 60 by contacting a contact plate 102 provided in the casing 100 during the slide of the slide portion 60. In addition, three screw holes 60C for screwing and supporting the stopper portion 60A are opened on the side surface portion of the slide portion 60, and corresponding to the slide amount of the slide portion 60A for releasing the braking of the braking device 3. The position of the stopper portion 60A can be changed. That is, when the stopper portion 60A stops the slide control of the slide portion 60 due to a failure of the control circuit portion 7 or the like, the braking operation by excessive slide of the slide portion 60 is stopped by stopping the slide of the slide portion 60. The part 5 and the slide part 60 are prevented from being damaged or deformed.

  As the drive source 61, a DC motor is used. The drive source 61 is driven and stopped under the control of the control circuit unit 7 based on the input brake release signal and brake return signal.

  The drive transmission unit 61 includes a tooth part 620 formed on the slide part 60, a pinion 621 that meshes with the tooth part 620, and a gear train (not shown) that transmits the drive of the drive source 62 to the pinion shaft 622 of the pinion 621. And a built-in gear box 623. The drive transmission unit 62 includes a one-way clutch 624 that prevents reverse rotation of the pinion 621 when the braking release operation unit 6 releases the braking of the braking unit 4, and a control circuit unit based on an input braking return signal 7, a solenoid 625 for releasing the reverse rotation prevention state of the one-way clutch 624 is provided.

  The pushing portion 63 includes a support plate 63A provided at an end portion of the slide portion 60 on the braking operation portion 5 side, and a contact body 63B screwed to the support plate 63A. The support plate 63 </ b> A is formed such that its side surface portion 630 is parallel to the side wall 101 of the casing 100. The contact body 63B includes an adjustment bolt 631 screwed to the side surface portion 630 in parallel with the sliding direction of the slide portion 60, and a lock nut 632 that fixes the position of the adjustment bolt 631. The portion comes into contact with the braking operation unit 5. The contact body 63B performs fine adjustment of the contact position with respect to the brake operation unit 5 by rotating the adjustment bolt 631 and moving the bolt head portion in the direction of the brake operation unit 5 or the casing 100. .

  The stopper portion 60A may be attached as shown in FIGS. The stopper portion 60 </ b> A in this form protrudes from the side surface portion of the slide portion 60 protruding from the left side wall 101 in the illustration of the casing 100, and comes into contact with the left side wall 101 by sliding of the slide portion 60. Further, three screw holes 60B for screwing and supporting the stopper portion 60A are opened on the side surface portion of the slide portion 60, and the position changing operation of the stopper portion 60A can be performed from the outside of the casing 100. Yes. That is, since the position changing operation of the stopper portion 60A can be performed without opening the casing 100, an improvement in the speed of the position changing operation can be expected. In the drawing, reference numeral 60 </ b> D is a protrusion for preventing the slide portion 60 from coming off, and is screwed onto the side surface portion of the slide portion 60. In addition, description about the site | part which overlaps with the form shown in FIGS. 3-5 was abbreviate | omitted by attaching | subjecting the same code | symbol.

  Such an automatic closing device 10 detects the fluctuation of the load acting on the drive source 61 during the brake releasing operation, and based on the detection result, the slide of the slide unit 60 stops at the movable limit position of the brake operation unit 5. Thus, by controlling to stop the drive of the drive source 61, excessive sliding of the slide part 60 is prevented, and breakage and deformation of the brake operation part 5 and the slide part 60 are prevented.

  In the present embodiment, the above-described load fluctuation is detected by detecting a current value fluctuation corresponding to the load fluctuation acting on the drive source 61 during the braking release operation.

  Hereinafter, the control for stopping the drive of the drive source 61 at the movable limit position of the braking operation unit 5 will be specifically described. FIG. 9 is a block diagram illustrating a configuration of the automatic closing device 10 including the control circuit unit 7. The control circuit unit 7 includes a drive switch unit 70, a load variation detection unit 71, a movable limit detection unit 72, a brake return operation unit 73, a storage unit 74, a control unit 75, and a CPU (not shown).

  The drive switch unit 70 turns on the drive source 61 when the brake release signal is input to the signal input unit 200, and the drive source 61 when the brake switch signal 70 is turned on when the brake return signal is input to the signal input unit 200. Is turned off.

  The load fluctuation detecting unit 71 starts detecting the current value fluctuation of the driving source 61 simultaneously with turning on of the driving switch unit 70, and continues to detect the current value fluctuation of the driving source 61 in real time during the detection. Thus, the detection of fluctuations in the current value of the drive source 61 is completed simultaneously with the turning-off of the drive switch unit 70. Further, the load fluctuation detection unit 71 may start detection when a brake release signal is input to the signal input unit 200 and end detection when a brake return signal is input to the signal input unit 200. Good.

  The movable limit detection unit 72 outputs a movable limit signal by detecting that the detected current value exceeds a predetermined threshold and determining that the braking operation unit 5 has reached the movable limit position. is there.

  The brake return operation unit 73 outputs a reverse rotation prevention release signal for releasing the reverse rotation prevention state of the one-way clutch 624 to the solenoid 625 based on the brake return signal input to the signal input unit 200. It is.

  The storage unit 74 temporarily stores various programs executed by the CPU, various application programs, ROM that stores various data, threshold value data indicating a movable limit for stopping driving of the driving source 61, calculation results, and the like. A random access memory (RAM) or the like is provided, and various programs and various data are taken in and out based on requests from the control unit 75.

  The control unit 75 controls the braking release operation and the braking operation of the automatic closing device 10, and specifically, a drive control unit 9A, a load variation detection control unit 9B, a movable limit detection control unit 9C, And a braking state return control unit 9D.

  The drive control unit 9A controls the drive switch unit 70 to be turned on based on the brake release signal input to the signal input unit 200 and the drive switch unit based on the movable limit signal output from the movable limit detection unit 72. The control to turn off 70 is performed.

  The load fluctuation detection control unit 9B controls the load fluctuation detection unit 71 to start detecting the current value fluctuation of the drive source 61 at the same time when the drive switch unit 70 is turned on, and detects the load fluctuation at the same time as the drive switch unit 70 is turned off. The unit 71 is controlled to end detection of fluctuations in the current value of the drive source 61.

  When the detected current value variation is a current value variation due to an inrush current at the start of the drive source 61, the movable limit detection control unit 9C controls the current value variation at the movable limit position with respect to the movable limit detection unit 72. Control based on the current value fluctuation detected by the movable limit detection unit 72 and the control for detecting the current value fluctuation at the movable limit position of the braking operation unit 5. Control is performed to output a limit signal.

  The braking return operation control unit 9D releases the reverse rotation prevention state of the one-way clutch 624 from the solenoid 625 based on the braking return signal input to the signal input unit 200 with respect to the braking return operation unit 73. Control is performed to output a release signal.

  FIG. 10 is a waveform diagram for explaining the control operation of the movable limit detection control unit 9C of the present embodiment. This waveform diagram shows the fluctuation of the current value of the drive source 61 when the braking operation unit 5 reaches the movable limit position from the start of the drive source 61. In this waveform diagram, an inrush current waveform a representing a current value variation at the start of the drive source 61, a braking release operation current waveform b representing a current value variation in a state where the slide unit 60 pushes the braking operation unit 5, A movable limit current waveform c representing a current value fluctuation in a state where the braking operation unit 5 reaches the movable limit is formed. Further, a larger threshold value d is set near the maximum current value of the braking release operation current waveform b. The maximum current value of the braking release operation current waveform b serving as a reference for the threshold value d may be the maximum current value in the entire braking release operation current waveform b, but within a predetermined time on the initial side of the braking release operation current waveform b. It is also possible to set the maximum current value. The threshold value d is preferably an appropriate predetermined margin value added to the maximum current value of the braking release operation current waveform b. This margin value is preferably set as small as possible within the condition that the threshold value d is not affected by the error of the maximum current value of the braking release operation current waveform b. Further, the reference value of the threshold value d can be the minimum current value of the braking release operation current waveform b. Also in this case, the threshold value d may be obtained by adding an appropriate predetermined margin value to the minimum current value of the brake release operation current waveform b. It is preferable to set the maximum current value of b as small as possible within the condition that the maximum current value of b is assumed not to exceed the threshold value d.

  The movable limit detection control unit 9C of the present embodiment is configured so that the movable limit detection unit 72 at the movable limit position of the braking operation unit 5 when the detected current value variation exceeds the threshold value d. Control is performed to detect the current value fluctuation and to output a movable limit signal based on the detected current value fluctuation. Therefore, when the braking operation unit 5 reaches the movable limit position, the pushing of the slide unit 60 that acts on the braking operation unit 5 can be stopped. In addition, since the current value fluctuation of the inrush current waveform a is a fluctuation exceeding the threshold value d, when the detected current value fluctuation is a current value fluctuation at the start of the drive source 61, the movable limit detector 72 is controlled so as not to be detected as a current value fluctuation at the movable limit position.

  FIG. 11 is a flowchart of a program including a control method of the movable limit detection control unit 9C of the present embodiment. This program is a program that is activated when a brake release signal is input to the signal input unit 200 (step S1).

  Based on the input brake release signal, the drive control unit 9A turns on the drive switch unit 70 to start driving of the drive source 61, and the slide unit 60 slides in the brake release direction so that the brake operation unit 5 is moved. The brake is pushed to release the braking of the braking unit 4 (step S2). Simultaneously with the turning on of the drive switch unit 70, the load variation detection unit 71 starts detecting the current value variation of the drive source 61 (step S3).

  Based on the detected current value fluctuation, the movable limit detecting unit 72 detects whether or not the movable limit current fluctuation is generated when the braking operation unit 5 is movable, and the detected current value fluctuation starts the drive source 61. In the case of current value fluctuation at the time (step S4), even if this current value fluctuation exceeds the threshold value d, it is not detected as a movable limit current value fluctuation. When the detected current value variation is a movable limit current value variation (step S5), a movable limit signal is output (step S6). Based on the output movable limit signal, the drive control unit 9A turns off the drive switch 70 to stop the drive of the drive source 61, and the slide of the slide unit 60 is movable by the braking operation unit 5 in accordance with the stop of the drive. Stop at the limit position (step S7).

  In a state where the drive source 61 is stopped, the one-way clutch 624 holds the slide portion 60 at the movable limit position of the braking operation portion 5. The holding of the slide portion 60 is transmitted to the signal input portion 200 as a brake return signal. As long as is not input, it continues (step S8). When this brake return signal is input, the brake return operation unit 73 outputs a reverse rotation prevention release signal for releasing the reverse rotation prevention state of the one-way clutch 624 to the solenoid 625 (step S9). When the solenoid 625 releases the reverse rotation prevention state of the one-way clutch 624 based on the reverse rotation prevention release signal, the sliding portion 60 slides in the braking direction by the tension spring 60B, so that the braking portion 4 returns to the braking state. (Step S10).

  According to the opening / closing apparatus 1 of the present embodiment, the movable limit detecting unit 72 detects a current value variation at the movable limit position of the braking operation unit 5, and the slide of the slide unit 60 is moved at the movable limit position of the braking operation unit 5. Since it is made to stop, the slide part 60 does not slide excessively. Therefore, breakage and deformation of the brake operation unit 5 and the slide unit 60 can be prevented.

  Further, when the detected operating current value is the operating current value at the start, and when the detected current value fluctuation is the current value fluctuation at the start of the drive source 61, the movable limit detector 72 is controlled not to be detected as a current value fluctuation at the movable limit position, and the slide part 60 is held at the movable limit position of the braking operation part 5 by the one-way clutch 624. Can be prevented from stopping before the braking operation unit 5 reaches the movable limit position. Therefore, the opening / closing body A1 can be fully closed without stopping in the middle of the closing operation, and it is possible to prevent the spread of fire and smoke during a fire.

  In addition, according to the automatic closing device 10 in the opening / closing device 1 of the present invention, the setting of the sliding amount of the sliding portion 60 and the setting of the mounting position of the automatic closing device 10 with respect to the opening / closing device 2 can be performed within the range where the braking of the braking portion 4 can be released. It can be set freely if it is within. Therefore, the efficiency of the attaching operation of the automatic closing device 10 can be improved. In particular, when the automatic closing device 10 is exchanged at an existing site, the automatic closing device 10 can be efficiently attached.

  Next, a second embodiment of the opening / closing device 1 will be specifically described with reference to FIGS.

  The configuration of the control unit 75 including the automatic opening / closing device 10, the switch 2, and the movable limit detection control unit 9C is the same as that of the first embodiment described above, and illustration and description of these configurations are omitted. To do.

  12 and 13 are waveform diagrams for explaining the control operation of the movable limit detection control unit 9C of this embodiment. This waveform diagram shows the fluctuation of the current value of the drive source 61 when the braking operation unit 5 reaches the movable limit position from the start of the drive source 61. In this waveform diagram, an inrush current waveform a representing current value fluctuation at the start of the drive source 61, a constant speed current waveform b representing current value fluctuation in a state where the drive source 61 has reached a constant speed, and the braking operation unit 5 tilted. Deflection current waveform c representing current value fluctuation in a state where deflection has occurred immediately before, Brake releasing operation current waveform d representing current value fluctuation in a state where the slide unit 60 pushes and tilts the braking operation unit 5, A movable limit current waveform e representing a current value fluctuation in a state where the braking operation unit 5 reaches the movable limit is formed. Also, a larger first threshold value f is set near the maximum current value of the constant speed current waveform b, and a larger second threshold value g is set near the maximum current value of the braking release operation current waveform d. ing. The maximum current value of the constant speed current waveform b (braking release operation current waveform d) serving as a reference for the first threshold value f (second threshold value g) is the constant speed current waveform b (braking release operation current waveform d). The maximum current value in the whole may be used, but it is also possible to set the maximum current value within a predetermined time on the initial side of the constant speed current waveform b (braking release operation current waveform d). The first threshold value f (second threshold value g) is preferably an appropriate predetermined margin value added to the maximum current value of the constant speed current waveform b (braking release operation current waveform d). This margin value is within the condition that the first threshold value f (second threshold value g) is not affected by the error of the maximum current value of the constant speed current waveform b (braking release operation current waveform d). It is preferable to set the value as small as possible. The reference value of the first threshold value f (second threshold value g) can be the minimum current value of the constant speed current waveform b (braking release operation current waveform d). Also in this case, the first threshold value f (second threshold value g) may be an appropriate predetermined margin value added to the minimum current value of the constant speed current waveform b (braking release operation current waveform d). However, the margin value is within the condition that the maximum current value of the constant speed current waveform b (braking release operation current waveform d) is assumed not to exceed the first threshold value f (second threshold value g). It is preferable to set the value as small as possible.

  The movable limit detection control unit 9 </ b> C according to the present embodiment causes the movable limit detection unit 72 to detect the first current value variation (when the detected current value variation exceeds the first threshold value f). Control to be detected as a first load fluctuation) and a second current fluctuation (second load fluctuation) when the detected load fluctuation is a current fluctuation that forms a flat braking release operation current waveform d as shown in the figure. ) And a third current value fluctuation (third load fluctuation) at the movable limit position of the braking operation unit 5 when the detected current value fluctuation is a fluctuation exceeding the second threshold value g. Control is performed so that the movable limit signal is output based on the detected third current value fluctuation. Therefore, when the braking operation unit 5 reaches the movable limit position, the pushing of the slide unit 60 that acts on the braking operation unit 5 can be stopped.

  Further, the movable limit detection control unit 9C of the present embodiment has a first current value variation to the movable limit detection unit 72 when the detected current value variation is a current value variation at the start of the drive source 61. Control is performed so as not to detect the third current value fluctuation. Therefore, the slide of the slide portion is not stopped before the braking operation portion 5 reaches the movable limit position.

  FIG. 14 is a flowchart of a program including the control method of the movable limit detection control unit 9C of the present embodiment. This program is a program that is activated when a brake release signal is input to the signal input unit 200 (step S1).

  Based on the input brake release signal, the drive control unit 9A turns on the drive switch unit 70 to start driving of the drive source 61, and the slide unit 60 slides in the brake release direction so that the brake operation unit 5 is moved. Pushing (step S2). Simultaneously with the drive of the drive source 61, the load fluctuation detector 71 starts detecting the current value fluctuation of the drive source 61 (step S3).

  When the movable limit detector 72 detects whether or not the first current value fluctuation is based on the detected current value fluctuation, and the detected current value fluctuation is a current value fluctuation at the start of the drive source 61 (Step S4) Even if this current value fluctuation exceeds the first threshold value f and the second threshold value g, it is not detected as the first current value fluctuation to the third current value fluctuation.

  When the detected current value variation is the first current value variation (step S5), the movable limit detector 72 detects whether or not the second current value variation is present (step S6). When the detected current value fluctuation is the second current value fluctuation, the movable limit detection unit 72 detects whether or not the current limit fluctuation is the third current value fluctuation (step S7). If the detected current value variation is the third current value variation, a movable limit signal is output (step S8). Based on the output movable limit signal, the drive control unit 9A turns off the drive switch 70 to stop the drive of the drive source 61, and the slide of the slide unit 60 is movable by the braking operation unit 5 in accordance with the stop of the drive. Stop at the limit position (step S9).

  Since the flowchart after step S9 is the same as the flowchart after step S7 of the first embodiment, illustration and description are omitted.

  According to the switchgear 1 of this embodiment, it has the same effects as the switchgear 1 of the first embodiment described above, and further has the following advantages.

  For example, the threshold value may need to be set higher due to variations in the strength of the braking operation unit 5 depending on the type of the opening / closing device 2 and differences in structure. In particular, when the strength of the brake operation unit 5 is low and the current value fluctuation of the drive source 61 at the movable limit position is small, the current value fluctuation does not exceed the threshold value set at the movable limit position, and the There is a possibility that the current value fluctuation at the limit position cannot be detected and the drive source 61 cannot be stopped at the movable limit position of the braking operation unit 5.

  The control of the present embodiment includes the first current value fluctuation in a state in which the braking operation unit 5 is bent immediately before tilting, and the second current value fluctuation in a state in which the slide unit 60 pushes and tilts the braking operation unit 5. Since the brake operation unit 5 sequentially detects the third current value fluctuation in a state where the movable limit has been reached and detects the third current value fluctuation, the brake operation unit 5 is controlled to output the movable limit signal. Even when the intensity of 5 is low and the fluctuation of the current value of the drive source 61 at the movable limit position is small, the fluctuation of the current value at the movable limit position can be reliably detected.

  Next, a third embodiment of the switchgear 1 will be specifically described with reference to FIG. In the control of the present embodiment, when the detected current value fluctuation is a predetermined current value fluctuation set within a predetermined time, it is detected as a current value fluctuation at the movable limit position.

  In addition, since the structure of the control part 75 provided with the automatic opening / closing apparatus 10, the switch 2, and the movable limit detection control part 9C is the same structure as 1st Embodiment mentioned above, illustration of the automatic closing apparatus 10 and a control part and Description is omitted. Further, since the flowchart of the program including the control method of the movable limit detection control unit 9C is the same as that of the first embodiment, illustration and description thereof are omitted.

  FIG. 15 is a waveform diagram showing fluctuations in the current value of the drive source 61 when the braking operation unit 5 reaches the movable limit position from the start of the drive source 61. In this waveform diagram, an inrush current waveform a representing a current value variation at the start of the drive source 61, a braking release operation current waveform b representing a current value variation in a state where the slide unit 60 pushes the braking operation unit 5, A movable limit current waveform c representing a current value fluctuation in a state where the braking operation unit 5 reaches the movable limit is formed.

  The movable limit current waveform c indicates that the current value rapidly increases in a short time when the braking operation unit 5 reaches the movable limit from the braking release operation. That is, a current value fluctuation within a predetermined time in which the movable limit current waveform c is formed is set, and the current value fluctuation within the set predetermined time is detected as a current value fluctuation at the movable limit position of the braking operation unit 5. By controlling so that the slide portion 60 is controlled, excessive sliding of the slide portion 60 can be prevented. The inrush current waveform a indicates that the current value increases rapidly in a short time, like the movable limit current waveform c. Therefore, in order not to erroneously detect the current value fluctuation at the start as the current value fluctuation at the movable limit, the movable limit detection control unit 9C of the present embodiment also detects the detected current value fluctuation as the start of the drive source 61. Control is performed so that the movable limit detector 72 does not detect the fluctuation of the current value at the movable limit when the current value varies at that time.

  According to the switchgear 1 of this embodiment, it has the same effect as the switchgear 1 of the above-mentioned first embodiment.

  As another embodiment of the control for detecting the movable limit position, the inrush current waveform a, the brake release operation current waveform b, the waveform characteristics of the movable limit current waveform c, the inrush current waveform a, the constant speed current waveform b, the deflection current waveform. c, using the characteristics of the waveform of the braking release operation current waveform d and the movable limit current waveform e, and setting each of the current value fluctuations within a predetermined period of time when these waveforms are formed. By detecting, it is possible to specify the movable limit position.

  As another embodiment of the control for detecting the movable limit position, for example, a mode of detecting a current value variation due to a load when the stopper portion 60A of the automatic closing device 10 shown in FIGS. The control which detects the electric current value fluctuation | variation by load when the stopper part 60A of the automatic closure apparatus 10 shown in FIGS. 6-8 contacts the side wall 102 of the casing 100 is mentioned.

  In this detection mode, the slide unit 60 is adjusted so as to push the braking operation unit 5 to the movable limit position at a position where the stopper 60A contacts the contact plate 102 or the side wall 101. Then, the current value fluctuation of the drive source 61 when the slide part 60 slides and the stopper 60A comes into contact with the contact plate 102 or the side wall 101 is detected as the current value fluctuation at the movable limit position of the braking operation part 5. By controlling, excessive sliding of the slide part 60 can be prevented.

  As another embodiment of the control for detecting the movable limit position, for example, the load fluctuation detection unit 71 is a pressure sensor, and the pressure sensor detects a pressure value fluctuation acting when the slide unit 60 slides. There is a control (not shown) that detects the fluctuation of the pressure value at the movable limit position of the braking operation unit 5 when the threshold value is exceeded.

  The automatic closing device 10 illustrated in each of the above-described embodiments pushes and tilts the braking operation unit 5 by sliding the slide unit 60. In the present invention, the braking operation unit 6 is moved by sliding the slide unit 60. Including a form of tilting by moving (not shown). Further, the automatic closing device 10 of the present invention is not limited to the illustrated form, and may be any form that can slide the slide part 60 and tilt the braking operation part 5 by driving the drive source 61 (see FIG. Not shown). Further, the function of the automatic closing device 10 and the braking operation unit 5 may be incorporated in a casing A5 in which the opening / closing device 2 is incorporated (not shown). In addition to the shutter device, the present invention is braked in a state where the opening / closing body is always urged to the closed side by its own weight, spring force, magnetic force, etc. The present invention can also be applied to opening / closing devices such as overhead door devices, door devices, sliding door devices, folding door devices, smoke-proof wall devices, and smoke-proof curtain devices.

1: Opening / closing device 10: Automatic closing device A1: Opening / closing body 3: Brake device 4: Brake unit 5: Brake operation unit 6: Brake release operation unit 71: Load fluctuation detection unit 72: Movable limit detection unit 75: Control unit d: Threshold f: first threshold g: second threshold

Claims (4)

An opening / closing body that closes due to its own weight, a braking portion that brakes the closing operation due to its own weight, a braking operation portion that tilts to release the braking of the braking portion, and a slide that slides with the driving force of the drive source A brake release operation unit that pushes the brake operation unit so as to release the brake, and a load applied to the brake release operation unit during the brake release operation of the brake release operation unit based on the input brake release signal. A load fluctuation detection unit for detecting fluctuations, a movable limit detection unit for detecting that the detected load fluctuations are load fluctuations at the movable limit position of the braking operation unit, and outputting a movable limit signal; A control unit for controlling the brake release operation of the brake release operation unit based on a movable limit signal to be stopped, and
The movable limit detection unit detects a first load variation that is a first load variation excluding a load variation at the start of the braking release operation unit, and exceeds a predetermined threshold value, and detects the first load variation. A load change after the detection of the change, the load change at the time of the brake release operation of the brake release operation unit is detected as a second load change, the load change after the detection of the second load change, Control is performed to detect a load fluctuation exceeding the maximum value of two load fluctuations as a third load fluctuation at the movable limit position,
The first load fluctuation is a current value fluctuation of the drive source in a state in which the brake operation unit is deflected immediately before tilting,
The second load variation is a current value variation of the drive source in a state where the slide portion pushes and tilts the braking operation portion. The slide part is provided with a stopper part, a casing in which the slide part penetrates in the sliding direction is provided with a contact plate, and the stopper part comes into contact with the contact plate, thereby causing excessive sliding of the slide part. The shutter device according to claim 1, wherein the shutter device is regulated.   A drive transmission unit that transmits the rotational force of the drive source to the slide unit is provided, and the drive transmission unit prevents reverse rotation of the drive source when the braking release operation unit releases the braking of the braking unit. By providing a one-way clutch that holds the slide portion at the movable limit position of the braking operation portion, when a braking return signal is input, the reverse rotation prevention state of the one-way clutch is released, and the sliding portion is moved in the braking direction. The shutter device according to claim 1, wherein the shutter is slid to return to a braking state.   The slide portion is provided with a contact body that contacts the brake operation portion and pushes the brake operation portion, and the contact body is opposed to the slide portion and is directed in the direction of the brake operation portion or the opposite direction thereof. 4. The shutter device according to claim 1, wherein the shutter device is configured to perform fine adjustment of a contact position with respect to the braking operation section.

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