JP2010111994A - Opening and closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening and closing device, capable of further reducing the energy quantity to be supplied to a driving source which generates driving force for moving an opening and closing body. <P>SOLUTION: A shutter curtain 1 that is an opening and closing body of a disaster prevention shutter is arrested to perform closing movement between a fully open position Y1 and a middle position Y2 by a return spring force accumulated in a return spring. In case of emergency such as fire, the shutter curtain 1 performs, from the fully opening position Y1 to the middle position Y2, electric lowering by a winding shaft 6 rotating by input of a disaster prevention signal BS to a DC motor 14 that is the driving source, and performs, from the middle position Y2 to a fully close position Y3, gravity-lowering by a torque around the winding shaft 6 by a downward closing moving force based on the deadweight of the shutter curtain 1, that is an energizing force other than the driving force generated in the motor 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an opening / closing device provided with a drive source that generates a driving force for moving an opening / closing body, for example, a shutter device that forms a disaster prevention section with a shutter curtain and an opening such as an entrance / exit with the shutter curtain. The present invention is applicable to various shutter devices including an opening shutter device that opens and closes, various door devices including a fire door device, and the like.

The disaster prevention shutter device and the opening shutter device, which are open / close devices, include a shutter curtain that is an open / close movable body. In these shutter devices, for example, as described in Patent Document 1 below, the shutter curtain moves and closes by being drawn out from the take-up shaft, and opens and moves by being taken up by the take-up shaft. The winding shaft is rotated by a driving force generated by a motor which is a driving source constituting the opening / closing machine.
JP 2002-30878 A

  By the way, in the shutter device, the amount of power consumed by the motor that constitutes the opening / closing device for feeding the shutter curtain and rotating the take-up shaft (in other words, the amount of power that is the amount of energy that needs to be supplied to the motor) is greater. Small is desirable.

  An object of the present invention is to provide an opening / closing device that can reduce the amount of energy that needs to be supplied to a driving source that generates a driving force for moving the opening / closing body.

  An opening / closing apparatus according to the present invention includes an opening / closing body that can be opened and closed, and a drive source that generates a driving force for moving the opening / closing body, and an arbitrary stop in a moving path of the opening / closing body. The movement from the position to a position separated by a predetermined distance or the movement until the predetermined time elapses from the arbitrary stop position of the opening / closing body is performed by the driving force generated by the driving source, and the opening / closing body is The movement of the opening / closing body after moving to a position separated by a predetermined distance or after the opening / closing body has moved until the predetermined time has passed to the movement limit position of the opening / closing body is generated by the drive source. It is characterized by being performed with an urging force other than force.

  In the present invention, the movement from the arbitrary stop position in the moving path of the opening / closing body to a position separated by a predetermined distance or the movement until the predetermined time elapses from the arbitrary stopping position in the movement path of the opening / closing body is generated by the drive source. It is done with the driving force. Then, after the opening / closing body moves to the position separated by the predetermined distance, or after the opening / closing body moves until the predetermined time elapses, the movement to the movement limit position of the opening / closing body is the driving force generated by the drive source. It is performed with other energizing forces.

  In other words, in the present invention, the driving force generated by the driving source is used to move from an arbitrary stop position in the moving path of the opening / closing body to a position separated by a predetermined distance, or to an arbitrary stop in the moving path of the opening / closing body. It is a movement until a predetermined time elapses from the position. When the opening / closing body moves to the position separated by the predetermined distance, or after the opening / closing body moves until the predetermined time elapses, the movement of the opening / closing body to the movement limit position causes the driving force generated by the driving source. Is not used.

  Therefore, in the present invention, the driving force generated by the drive source is used for the movement of the opening / closing body in any part of the movement path of the opening / closing body.

  For this reason, according to the present invention, the amount of energy (for example, the amount of electric power) that needs to be supplied to the driving source that generates the driving force for moving the opening / closing body is made smaller than that of the conventional opening / closing device. Will be able to.

  In the present invention, the “position separated by a predetermined distance” is a position until the opening / closing body reaches the movement limit position, and excludes the movement limit positions (fully closed position, fully opened position) of the opening / closing body. The “predetermined time” is the time until the opening / closing body reaches the movement limit position, and excludes the time until the opening / closing body reaches the movement limit position.

  Here, the urging force other than the driving force of the driving source may be, for example, the gravity of the opening / closing body, and the return elastic force of the return elastic member arranged in the opening / closing device (of the closing movement and opening movement of the opening / closing body) The return elastic force is accumulated by one movement, and the accumulated return elastic force is used at the time of the other movement), or a combination of these. For example, if the driving force of the driving source is generated by electric power, the urging force other than the driving force of the driving source is arbitrary as long as it is generated by non-electric power (not depending on electric power).

  In the present invention, the movement of the opening / closing body is performed by the driving force generated by the driving source. In other words, the driving force generated by the driving source is used for the movement of the opening / closing body, for example, by closing the opening / closing body. Closed movement to a position (intermediate position) that is a predetermined distance away from the fully open position or substantially fully open position in the movement path may be possible, or a position (intermediate position) that is separated from the fully closed position or substantially fully closed position in the open movement path of the opening / closing body. ), Or a position (including the fully closed position) further away from the position separated by a predetermined distance in the closing movement path of the opening / closing body (intermediate position) from the position separated by the predetermined distance in the closing movement direction. The position of the opening / closing body may be further moved in the opening movement direction from the position spaced apart by the predetermined distance (intermediate position) in the opening movement path of the opening / closing body. It may be open movement to constant distance spaced locations (not including the fully open position).

  In addition, the movement of the opening / closing body may be performed by the driving force generated by the driving source, for example, a fully open position in the closing movement path of the opening / closing body or a closing movement until a predetermined time elapses from the fully opened position. It may be an open movement until a predetermined time elapses from the fully closed position or the substantially fully closed position in the open movement path of the open / closed body until a predetermined time elapses from a position (intermediate position) separated by a predetermined distance in the closing movement path of the opening / closing body The opening movement may be a closing movement or an opening movement until a predetermined time elapses from a position (intermediate position) that is separated by a predetermined distance in the opening movement path of the opening / closing body.

  In the present invention, at the boundary between the range where the movement of the opening and closing body in the movement path of the opening and closing body is performed with the driving force generated by the driving source and the range where the biasing force other than the driving force generated by the driving source is performed. The movement of the opening / closing body may be temporarily stopped or may not be temporarily stopped.

  In the present invention, the driving source that generates the driving force for moving the opening and closing body may be one that operates with a commercial power source, one that operates with a battery, a disaster prevention panel composed of a fire alarm or the like, smoke The thing etc. which operate | move by the input of the disaster prevention signal generated from the sensor etc. may be used. The driving source that generates the driving force for moving the opening / closing body can be a turbine using water pressure or wind pressure, or an engine using petroleum fuel.

  When the drive source is operated by the input of the disaster prevention signal, the power required for the drive source is smaller than when the drive source is operated by a commercial power source or battery. It becomes. Further, when the drive source is operated by electricity, it is easier to reduce the size than when the drive source is operated by fuel or the like.

  In the present invention, it is preferable that a braking means for braking the movement of the opening / closing body is provided.

  According to this, the rapid increase in the moving speed of the opening / closing body can be suppressed, and the opening / closing body can be moved at a speed close to a preferable speed range.

  Here, the range in which the movement of the opening / closing body is braked by the braking means may be the entire range of the movement path of the opening / closing body or an arbitrary partial range. For example, the opening / closing body may be the full open position or the full range from the substantially fully open position to the fully closed position or the substantially fully closed position, and the open / close body may be from the fully closed position or the substantially fully closed position to the fully open position or the substantially fully open position. The entire range up to the closing movement may be used, or both of these ranges may be used. Of the movement path of the opening / closing body, only the range in which the opening / closing body moves with an urging force other than the driving force generated by the driving source may be used.

  In the present invention, the type and structure of the driving source that generates the driving force for moving the opening / closing body are arbitrary, and may be, for example, a DC motor (DC motor) or an AC motor (AC motor). In this case, the urging force other than the driving force generated by the driving source is generated by non-power (not depending on the power) as described above.

  In the present invention, the type and structure of the braking means for braking the movement of the opening / closing body are arbitrary, and a first example thereof is a cogging torque of a motor (which may be a DC motor or an AC motor). Can do.

  According to this, when the opening / closing body is moved by an urging force other than the driving force generated by the motor as the driving source, the movement of the opening / closing body is braked by the cogging torque of the motor. Here, the cogging torque is a torque generated by a magnetic attractive force between the core and the magnet that is generated when the rotor of the motor is moved in a non-excited state.

  As a second example of the braking means, a motor (which may be a DC motor or an AC motor) that operates as a generator that consumes the kinetic energy of one of the opening / closing movements of the opening / closing body by the generation of electric power; And a braking circuit configured to include power consuming means for consuming the power generated by the motor.

  According to this, the motor that has generated the driving force for moving the opening / closing body operates as a generator when power is not supplied, and the power generated by the motor is consumed by the power consuming means. It becomes a brake.

  Here, the form and structure of the power consuming means are arbitrary as long as they consume power. For example, a resistor (a fixed resistor or a variable resistor), a lamp, a buzzer, a liquid crystal display device, It may be composed of charge load components such as a microcomputer, a fan, an electromagnet or the like, or may be composed of a combination of these charge load components.

  In the present invention, when the braking means is a braking circuit configured to include a motor that operates as a generator and power consumption means, the braking circuit measures the electromotive force generated by the motor. In accordance with the electromotive force measured by the electromotive force measuring means, the control means for inputting a signal from the electromotive force measuring means, the plurality of power consuming means having different power consumption capabilities, and the electromotive force measuring means, You may make it provide the selection switch means for the said control means to selectively connect one of the said several electric power consumption means to the said motor.

  According to this, the selection switch means selects one of a plurality of power consumption means connected to the motor in accordance with the amount of power generated by the motor.

  That is, when the amount of electric power generated by the motor exceeds a predetermined upper limit value (in other words, when the moving speed of the opening / closing body exceeds the predetermined upper limit value), the selection switch means has a large power consumption power. By switching from the consuming means to the power consuming means having a small power consumption capability, the braking force by the motor operating as a generator is increased, so that the moving speed of the opening / closing body can be slowed. On the other hand, when the amount of electric power generated by the motor falls below a predetermined lower limit value (in other words, when the moving speed of the opening / closing body falls below the predetermined lower limit value), the selection switch means has a power with low power consumption capability. By switching from the consumption means to the power consumption means having a large power consumption capability, the braking force by the motor is reduced, so that the moving speed of the opening / closing body can be increased.

  In this way, the braking force for the movement of the opening / closing body can be changed according to the amount of electric power generated by the motor, whereby the moving speed of the opening / closing body can be set within a predetermined range.

  The selection switch means may be arbitrary, and an example thereof is an electromagnetic relay. The switching operation of the switch part of the electromagnetic relay may be performed by electric power supplied from an original arbitrary power source (which may be the same system as the motor or a different system), or may be performed by electric power generated by the motor. But you can.

  In this invention, you may provide the obstruction detection means for detecting the obstruction during the closing movement of the opening-and-closing body.

  Here, the form and structure of the obstacle sensing means are arbitrary. As an example, a pressure-sensitive switch is provided at the end of the opening / closing body in the closing movement direction and senses the obstacle by contacting the obstacle. be able to. In this example, when the pressure-sensitive switch is activated, a signal indicating that an obstacle has been detected is transmitted from the pressure-sensitive switch to the control unit of the switchgear by wire or wirelessly.

  Further, as another example of the obstacle sensing means, the opening / closing body is disposed at both ends of the opening / closing body in the width direction that is orthogonal to or substantially orthogonal to the opening / closing movement direction of the opening / closing body, and guides the opening / closing movement of the opening / closing body. Of a pair of guide members for transmitting an obstacle sensing signal (such as a light wave or an ultrasonic wave) disposed at a predetermined position in the opening / closing movement direction of the opening / closing body of one guide member, and the other guide member And a receiving unit that is disposed at the predetermined position and receives the obstacle sensing signal transmitted from the transmitting unit. In this example, during the closing movement of the opening / closing body, the obstacle detection signal is always transmitted from the transmission unit to the reception unit, and when the obstacle detection signal is blocked by the obstacle, the reception unit detects the obstacle. Thus, a signal indicating that an obstacle has been detected is transmitted from the receiving unit to the control unit of the switchgear device by wire or wirelessly.

  Further, in the present invention, when the obstacle sensing means is provided and the braking means configured by the braking circuit is provided, when the obstacle sensing means senses an obstacle, You may make it provide the short circuit means for short-circuiting the said braking circuit.

  According to this, since the braking circuit that consumes the electric power generated by the motor is short-circuited, a large braking force is generated with respect to the closing movement of the opening / closing body, and when it contacts the end of the opening / closing body in the closing movement direction The impact received by the obstacle can be further reduced.

  Here, the form and structure of the short-circuit means are arbitrary, and an example thereof is a short-circuit for short-circuiting between motor terminals.

  As a configuration example of this short circuit, lead wires connected to both terminals of the motor and switch means for connecting or not connecting these lead wires (for example, an obstacle detection switch constituting obstacle detection means) ) And the like. In this configuration example, the switch means does not connect the lead wires in normal times (when no obstacle is detected), and connects the lead wires in an emergency (when obstacles are detected). Sometimes, by connecting the lead wires by the switch means, a short circuit having no electric parts such as power consuming means is formed in the braking circuit, and as a result, the motor terminals are short-circuited. The braking force due to becomes maximum.

  Moreover, in this invention, when the braking means comprised by the said braking circuit is provided, the said power consumption means may be an alerting | reporting means for alert | reporting a movement of the said opening-closing body.

  According to this, the notifying means notifies the movement of the opening / closing body using the electric power generated by the motor, and becomes the electric power consuming means for consuming the electric power generated by the motor.

  Note that the notification means may be, for example, a sound device that outputs a buzzer, sound, or the like by electric power generated by a motor, or an electric light device that outputs a red light, a yellow light, or the like, or a combination of these. But you can. The notification means may be mounted with a circuit for controlling the operation method of the notification means itself (repetition of predetermined display, change in tone color, blinking, etc.).

  The present invention described above can be applied to any opening / closing device, for example, it can also be applied to a shutter device in which the opening / closing body is a shutter curtain, and the opening / closing body is a door, or the opening / closing body is a gate. The present invention can also be applied to open / close devices and the like.

  The shutter device is a disaster prevention shutter device (including a disaster prevention shutter device for elevators) that forms a disaster prevention zone when the disaster prevention shutter curtain closes and moves to reach the fully closed position or almost fully closed position when a disaster such as a fire occurs. Alternatively, it may be a shutter device for an opening in which an opening such as an entrance or a window is opened and closed by a shutter curtain, a shutter device for a garage, or a shutter device installed in a truck bed or a container.

  The door device may be a disaster prevention door device in which the disaster prevention door is closed and rotated when a disaster such as a fire occurs, or may be a door device such as a front door.

  In the case where the opening / closing device is a shutter device, all or the main part of the shutter curtain may be formed of a sheet, or may be formed by connecting a large number of slats. Including a net-like one formed by knit), may be formed by connecting a plurality of panels, and may be formed by a plurality of pipes and links connecting these pipes. Alternatively, it may be formed of at least two of these composites.

  Further, the opening / closing movement direction of the shutter curtain may be the vertical direction, the left / right direction, or a direction inclined with respect to these directions.

  When the shutter curtain opening / closing movement direction is the vertical direction, the downward movement is a closing movement, the upward movement may be an opening movement, and the downward movement is an opening movement, The upward movement may be a closed movement.

  In addition, when the closing movement of the shutter curtain is a downward movement, the principle for the closing movement may be arbitrary. One example is a self-weight closing type in which the closing movement is performed by the weight of the shutter curtain. It is.

  The structure for opening and closing the shutter curtain is arbitrary, and an example thereof is to open and close the shutter curtain by winding and unwinding a winding shaft that can rotate forward and reverse.

  The winding shaft may be of any structure, for example, it may be a hollow or solid shaft or a plurality of shafts coupled in the axial direction, or a central shaft that does not rotate and the central shaft It may be arranged on the outer periphery of the shutter so as to be rotatable, and may include a rotating body for winding and unwinding the shutter curtain. And this rotary body may be comprised etc. including the wheel arranged apart in the direction of an axis in the perimeter of a central axis, and the connecting member which connects these wheels, and this connecting member, A plurality of bar-shaped members arranged in the circumferential direction may be used, or a pipe-shaped member in which each wheel is housed may be used.

  When the shutter curtain is opened and closed by forward / reverse rotation of the take-up shaft, the drive source is composed of power transmission means (for example, a chain or a sprocket) for transmitting the drive force generated by the drive source. And may be connected directly to the take-up shaft.

  In the present invention, the return elastic force is accumulated by the rotation of the winding shaft when the shutter curtain is extended downward, and the accumulated return elastic force is applied to the winding shaft when the shutter curtain is wound upward. You may make it provide the return elastic member to provide.

  According to this, the shutter curtain can be opened and moved using the return elastic force accumulated in the return elastic member as an auxiliary force.

  Further, in the case where the return elastic member is provided, in the range from the fully open position on the shutter curtain closing movement path to a position spaced a predetermined distance from the fully open position, the torque around the winding shaft due to the return elastic force of the return elastic member ( In other words, the spring torque) is made larger than the torque around the take-up shaft due to the downward closing movement force based on the weight of the shutter curtain (in other words, the weight of the shutter curtain), and is separated from the predetermined distance. In the range from the position to the fully closed position or the substantially fully closed position, the torque around the take-up shaft due to the downward closing movement force based on the weight of the shutter curtain is about the take-up shaft around the take-up shaft due to the return elastic force of the return elastic member. You may make it become larger than a torque. Thereby, the closing movement of the shutter curtain from the predetermined position to the fully closed position or the substantially fully closed position is performed by the torque around the winding shaft due to the downward closing moving force based on the weight of the shutter curtain.

  That is, the closing movement of the shutter curtain from the fully open position or the position that is separated from the substantially fully opened position by a predetermined distance is performed by the rotation of the winding shaft by the driving force generated by the drive source, and the shutter curtain is separated by the predetermined distance. The closing movement from the closed position to the fully closed position or the substantially fully closed position is the torque around the winding shaft due to the downward closing movement force based on the weight of the shutter curtain, which is an urging force other than the driving force generated by the drive source. Can be done at.

  For this reason, the driving force generated by the driving source may be used at least for the closing movement of the shutter curtain to a position at a predetermined distance from the fully opened position or the substantially fully opened position.

  It should be noted that in the range from the fully open position in the shutter curtain closing movement path to a position spaced a predetermined distance from the fully open position, the torque around the winding shaft due to the return elastic force of the return elastic member is downward based on the weight of the shutter curtain. When the torque is greater than the torque around the take-up shaft due to the closing movement force, the fully-open holding device for holding the shutter curtain in the fully open state or substantially fully open state becomes unnecessary.

  In addition, the form and structure of a return elastic member are arbitrary, The example is a spring. When this return elastic member is a spring, this spring may be any one such as a torsion coil spring or a mainspring spring.

  In the present invention, a push button type open / close switch that is manually operated is provided, and by operating this open / close switch, the shutter curtain is opened / closed forcibly by the driving force generated by the drive source. It may be.

  According to the present invention, the amount of energy that needs to be supplied to a driving source that generates a driving force for moving the opening / closing body can be further reduced.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 is an overall front view of a disaster prevention shutter device that is an opening / closing device according to an embodiment of the present invention, and this entire front view is a shutter that is an opening / closing body with the up / down direction as the opening / closing movement direction. The case where the curtain 1 is in a fully closed state or a substantially fully closed state is shown.

  A shutter curtain 1 that opens and closes by opening and closing the opening 2 that is the entrance of the building is located on the left and right sides of the opening 2 on guide rails 4 that are attached to a housing 3 such as a building wall. Both ends in the width direction, which are both ends in the direction, are slidably inserted. These guide rails 4 are guide members that guide the opening and closing movement of the shutter curtain 1, and are non-moving members that are stationary with respect to the shutter curtain 1.

  In addition, a smoke shielding member (not shown) that comes into contact with the shutter curtain 1 is provided in an opening portion (not shown) in which the end portion in the width direction of the shutter curtain 1 in each guide rail 4 is inserted, and by these smoke shielding members, Smoke generated by the occurrence of a fire is prevented from passing through the gap between the shutter curtain 1 and the guide rail 4 reaching the fully closed position or the substantially fully closed position and reaching the opposite side of the shutter curtain 1. .

  A shutter case 5 indicated by a two-dot chain line is provided above the opening 2, and a winding shaft 6 is supported by a pair of left and right brackets 7 and 8 in the shutter case 5 so as to be freely rotatable. The upper end portion of the shutter curtain 1 is coupled to the winding shaft 6. The end of the shutter curtain 1 on the closing side, in other words, the lower end of the shutter curtain 1 is a seat plate 1A as an end member, and the upper end of the seat plate 1A forms most of the shutter curtain 1. Therefore, the shutter curtain 1 is a slat type shutter curtain in which the main part is formed by connecting a large number of slats 9.

  The shutter curtain 1 is raised by being guided by a pair of left and right guide rails 4, and the seat plate 1 </ b> A is provided with a slit that forms the lower surface of the shutter case 5 and allows the shutter curtain 1 to be inserted vertically. Until the shutter curtain 1 is wound on the winding shaft 6, the shutter curtain 1 opens the opening 2 in a fully open state. The lintel slit is also provided with a smoke shielding member similar to the smoke shielding member provided at the opening of the guide rail 4 described above.

  In this embodiment, the shutter curtain 1 is drawn out from the take-up shaft 6 while rotating the take-up shaft 6 in the forward direction, and moves closed, and the seat plate 1A is landed on the floor 2A of the opening 2 to thereby release the shutter curtain 1. Makes the opening 2 fully closed.

  As described above, in this embodiment, the shutter curtain 1 is closed when the downward movement is performed, and is opened when the upward movement is performed.

  On the front side shown in FIG. 1, which is one of the front and back surfaces of the shutter curtain 1, when the shutter curtain 1 is opened and moved upward, it is used to lift the shutter curtain 1 with a hand. A pair of left and right handle members 10 are provided. These handle members 10 are arranged in such a manner that one of the spaces separated by the shutter curtain 1 where the evacuee has reached the fully closed position or the substantially fully closed position in the event of an emergency such as a fire breaks out. For example, the shutter curtain 1 that has reached the fully closed position or the substantially fully closed position is lifted and moved so that it can pass therethrough.

  FIG. 2 shows the internal structure of the winding shaft 6. The winding shaft 6 made of a hollow member is rotatable about the first and second central shafts 41 and 42 at both ends. The first central shaft 41 is coupled to one of the left and right brackets 7 and 8 and does not rotate. The first central shaft 41 is one open end of the winding shaft 6. It is inserted into a bearing member 43 coupled to the portion. On the other hand, the second central shaft 42 is a shaft that rotates because it is coupled to the winding shaft 6, and this second central shaft 42 is located inside the bearing member 44 that is coupled to the other bracket 8. It is inserted freely.

  Inside the take-up shaft 6, a rotating member 45 that is coupled to the take-up shaft 6 and rotates integrally with the take-up shaft 6 is incorporated, and the rotating member 45 and the first central shaft 41 are Both ends of a return spring (torsion coil spring) 46, which is a return elastic member, are connected. The return spring 46 housed in the take-up shaft 6 accumulates the return spring force when the take-up shaft 6 rotates forward in order to extend the shutter curtain 1 downward. 1 reaches the fully closed position or the substantially fully closed position while accumulating the return spring force.

  As shown in FIG. 2, a sprocket is provided at an end of the left and right ends of the second central shaft 42 that is not coupled to the winding shaft 6 (the right end in FIG. 2). 13 is fixed. The bracket 8 is attached with a DC motor 14 which is a drive source for generating a drive force for moving the shutter curtain 1, and a sprocket 16 is fixed to a drive shaft 14A of the DC motor 14. Yes. A chain 12 is wound around the sprocket 16 and the sprocket 13. For this reason, the chain 12, the sprocket 13, and the sprocket 16 serve as power transmission means 11 for transmitting the driving force generated by the DC motor 14 to the winding shaft 6. Thereby, the winding shaft 6 can be rotated electrically by the driving force generated by the DC motor 14.

  FIG. 3 is a graph in which the horizontal axis represents the number of rotations of the winding shaft 6 that winds the return spring 46 and the vertical axis represents the torque around the winding shaft 6 (rotational force of the winding shaft 6). FIG. 3 shows a line A indicating a change in torque (spring torque) around the winding shaft 6 due to the return spring force accumulated in the return spring 46 with respect to the number of rotations of the winding shaft 6, and rotation of the winding shaft 6. A line B indicating a change in the torque (self-weight torque) around the winding shaft 6 due to the weight of the portion of the shutter curtain 1 fed from the winding shaft 6 with respect to the number is shown.

  As shown in FIG. 3, the fully open position Y <b> 1 of the shutter curtain 1 (see also FIG. 1) coincides with the boundary position between the initial tightening range α and the intermediate range β regarding the tightening of the return spring 46. The fully closed position Y3 (see also FIG. 1) of the shutter curtain 1 coincides with the boundary position between the intermediate range β and the final tightening range γ.

  Further, as shown in FIG. 3, when the shutter curtain 1 that has reached the fully open position Y1 is fed out by rotating the winding shaft 6 by a predetermined angle such as one rotation or several rotations, the shutter curtain 1 Since the winding diameter when 1 reaches the fully open position Y1 is large, the length of the shutter curtain 1 fed downward by the rotation of the winding shaft 6 by the predetermined angle is that the shutter curtain 1 reaches the fully open position Y1. It becomes longer than the case where the winding shaft 6 starts rotating at a predetermined angle. For this reason, although the winding diameter is reduced by the rotation of the winding shaft 6 that feeds the shutter curtain 1 from the fully open position Y1, the length of the shutter curtain 1 that is fed downward is less than the reduction in the winding diameter. This contributes to an increase in the own weight torque. For this reason, when the shutter curtain 1 is extended from the fully open position Y1, the rate of increase of the self-weight torque of the shutter curtain 1 is large.

  As shown in FIG. 3, a distance L1 (see also FIG. 1) from a fully open position Y1 to a halfway position Y2 (in other words, a position Y2 spaced a predetermined distance from the fully open position Y1) in the movement path L of the shutter curtain 1. Then, the torque A around the winding shaft 6 due to the return spring force of the return spring 46 is larger than the torque B around the winding shaft 6 based on the weight of the shutter curtain 1. On the other hand, at a distance L2 from the midway position Y2 to the fully closed position Y3 in the movement path L of the shutter curtain 1 (see also FIG. 1), the torque B around the winding shaft 6 based on the weight of the shutter curtain 1 is the return spring 46. It is larger than the torque A around the take-up shaft 6 due to the return spring force.

  In other words, from the fully open position Y1 to the midway position Y2 in the movement path L of the shutter curtain 1, the spring torque A of the return spring 46 is larger than the own weight torque B of the shutter curtain 1, and the movement path of the shutter curtain 1 From the midway position Y2 in L to the fully closed position Y3, the own weight torque B of the shutter curtain 1 is larger than the spring torque A of the return spring 46.

  For this reason, in this embodiment, the shutter curtain 1 is restrained from unwinding from the winding shaft 6 by the return spring force accumulated in the return spring 46 from the fully open position Y1 to the midway position Y2. ing. Thereby, in this embodiment, the fully open holding | maintenance apparatus for hold | maintaining the shutter curtain 1 in a full open state or a substantially full open state is unnecessary. On the other hand, after the shutter curtain 1 is unwound from the winding shaft 6 to the midway position Y2, the shutter curtain 1 performs its own weight drop (closed movement by its own weight) until it reaches the fully closed position Y3.

  Note that the winding diameter of the shutter curtain 1 does not actually change smoothly with respect to the number of rotations of the winding shaft 6 due to the thickness of the slats 9 constituting the shutter curtain 1 and so on. The line B of FIG. 3 does not change smoothly as shown in FIG. 3, but changes as shown in FIG.

  As described above, in the present embodiment, when the shutter curtain 1 is drawn out from the winding shaft 6 and closed, the return spring force is accumulated in the return spring 46 incorporated in the winding shaft 6 that rotates forward. Is done. Therefore, after the shutter curtain 1 reaches the fully closed position Y3, when the shutter curtain 1 is lifted (opened) by placing a hand on the handle member 10, the winding shaft 6 is accumulated in the return spring 46. Since the shutter curtain 1 is wound up by reverse rotation with the return spring force, the lifting of the shutter curtain 1 by the handle member 10 is assisted by the return spring force accumulated in the return spring 46. As a result, the evacuees in an emergency such as the occurrence of a fire can lift and move the shutter curtain 1 lightly with a relatively small force and pass under it.

  When the administrator or the like returns the shutter curtain 1 to the fully open state after the shutter curtain 1 is fully closed for evacuation training or the like, the shutter curtain 1 is lifted and moved to the fully open position Y1 with a large force. Accordingly, the shutter curtain 1 is stopped at the fully open position Y1 by the return spring force of the return spring 46, and the shutter device returns to the state before the shutter curtain 1 starts to move.

  In the present embodiment, the shutter curtain 1 can also be closed and moved by manually pulling down the front end of an operating rod such as a locking rod to the seat plate 1A of the shutter curtain 1 and performing a manual pulling operation. It is possible.

  As described above, in the present embodiment, the shutter curtain 1 is prevented from being fed out from the winding shaft 6 by the return spring force of the return spring 46 from the fully open position Y1 to the midway position Y2 ( 1 and 3). For this reason, in the event of an emergency such as the occurrence of a fire, in order to extend the shutter curtain 1 from the winding shaft 6 from the fully open position Y1 to at least the middle position Y2, the winding shaft 6 is moved forward by the driving force generated by the DC motor 14. It is designed to rotate.

  As shown in FIGS. 1 and 2, the DC motor 14 is connected to a control device 15 including a memory (not shown), an MPU and the like for controlling the operation of the DC motor 14. . The control device 15 that operates by supplying power from a battery or the like is configured by a fire alarm that outputs a voltage-prevented disaster signal BS (for example, DC24 (V), etc.) in an emergency such as a fire. It is connected to an external disaster prevention panel (not shown).

  FIG. 4 shows a first embodiment of a motor drive circuit provided in the control device 15 for driving the DC motor 14. As shown in FIG. 4, in the event of an emergency such as the occurrence of a fire, a disaster prevention signal BS is supplied from the disaster prevention panel to the motor drive circuit 50, thereby driving the DC motor 14. That is, the current I flows through the motor drive circuit 50 by the disaster prevention signal BS input to the plus terminal 51 of the two terminals 51 and 52 of the motor drive circuit 50, thereby driving the DC motor 14. Since the driving force generated by the DC motor 14 is transmitted to the second central shaft 42 of the winding shaft 6 via the power transmission means 11, the winding shaft 6 starts to rotate in the forward direction. The curtain 1 starts to move closed from the winding shaft 6.

  In this embodiment, the disaster prevention signal BS (see FIGS. 1 and 2) output from the disaster prevention panel is a DC voltage signal with a constant voltage, and the occurrence time (output time) of the disaster prevention signal BS is: It is sufficient time to rotate the winding shaft 6 so that the shutter curtain 1 is closed and moved from the fully open position Y1 in the movement path L to the midway position Y2 (see FIGS. 1 and 3). In other words, in this embodiment, the generation time of the disaster prevention signal BS is sufficient to rotate the winding shaft 6 so that the shutter curtain 1 is closed and moved from the fully open position Y1 to the midway position Y2.

  FIG. 5 shows a flowchart of the operation of the shutter device according to the present embodiment in an emergency such as the occurrence of a fire.

  As shown in FIG. 5, when the disaster prevention signal BS is not input to the motor drive circuit 50 of the control device 15 (step S1-NO), in other words, when the disaster prevention signal BS is not output from the disaster prevention panel. Since the DC motor 14 is not supplied with electric power, the shutter curtain 1 is maintained in the fully open state or the substantially fully open state by the return spring force accumulated in the return spring 46.

  On the other hand, when the disaster prevention signal BS is input to the motor drive circuit 50 of the control device 15 (step S1-YES), in other words, when the disaster prevention signal BS is output from the disaster prevention panel, the DC motor 14 receives the disaster prevention signal BS. (Step S2), whereby the winding shaft 6 rotates forward and the shutter curtain 1 starts electric lowering (electrically closed movement) (step S3).

  Thereafter, when the input of the disaster prevention signal BS is continued (step S4-YES), the process returns to the processing after step S2, and the shutter curtain 1 continues the electric lowering.

  On the other hand, when the disaster prevention signal BS is not input (step S4-NO), the driving of the DC motor 14 is stopped (step S5). At this time, the shutter curtain 1 moves along the movement path as described above. L is closed and moved to an intermediate position Y2 (see FIGS. 1 and 3), and from the intermediate position Y2 to the fully closed position Y3, the own weight torque of the shutter curtain 1 is greater than the spring torque of the return spring 46. Is larger (see FIG. 3).

  For this reason, the shutter curtain 1 performs its own weight drop after moving to the midway position Y2 to the fully closed position Y3 (step S6). That is, after the shutter curtain 1 moves to the halfway position Y2 and then to the fully closed position Y3, the shutter curtain 1 is lowered based on the weight of the shutter curtain 1 that is an urging force other than the driving force generated by the DC motor 14 that is the driving source. The closing movement is performed by the torque around the winding shaft 6 by the closing movement force in the direction.

  During the descent of the shutter curtain 1, the rotational force of the take-up shaft 6 that feeds out the shutter curtain 1 is transmitted to the drive shaft 14 </ b> A of the DC motor 14 through the power transmission means 11. 14A performs rotation not based on electric power. For this reason, as described above, the DC motor 14 generates a torque due to the magnetic attraction between the core and the magnet generated when the rotor of the motor is moved in a non-excited state, that is, a cogging torque. Thereby, since the rotational speed of the drive shaft 14A of the DC motor 14 is adjusted to be substantially constant, the rotational speed of the winding shaft 6 is also adjusted to be substantially constant. As a result, the shutter curtain 1 is closed and moved at a substantially constant speed. Accordingly, in the present embodiment, a braking means for braking the closing movement of the shutter curtain 1 is provided, and this braking means is a cogging torque of the DC motor 14.

  As described above, in this embodiment, as shown in FIGS. 1 and 3, the spring torque of the return spring 46 is from the fully open position Y1 to the midway position Y2 in the movement path L of the shutter curtain 1. From the midway position Y2 to the fully closed position Y3 in the movement path L of the shutter curtain 1, the own weight torque of the shutter curtain 1 becomes larger than the spring torque of the return spring 46. ing. Accordingly, the shutter curtain 1 is prevented from being fed out from the winding shaft 6 by the return spring force of the return spring 46 from the fully open position Y1 to the midway position Y2.

  For this reason, in this embodiment, in order to close and move the shutter curtain 1 from the fully open position Y1 to the fully closed position Y3, the electric power necessary for driving the DC motor 14 that generates the driving force for rotating the winding shaft 6 is used. Only requires electric power to generate the driving force necessary for the DC motor 14 to rotate the winding shaft 6 by a predetermined angle so that the shutter curtain 1 moves from the fully open position Y1 to the intermediate position Y2. .

  That is, in this embodiment, the shutter curtain 1 is moved from the fully open position Y1 to a position at least beyond the intermediate position Y2, in other words, a predetermined time from the fully open position Y1 of the shutter curtain 1 (occurrence time of the disaster prevention signal BS). Is closed by the driving force generated by the DC motor 14, and after the shutter curtain 1 has moved at least to a position exceeding the midway position Y2, in other words, the shutter curtain 1 is moved for the predetermined time. The movement of the shutter curtain 1 to the fully-closed position Y3 after the movement until the elapse of time is closed downward based on the weight of the shutter curtain 1 that is an urging force other than the driving force generated by the DC motor 14. This is performed with a torque around the winding shaft 6 due to the moving force.

  Therefore, according to the present embodiment, it is possible to reduce the electric power required for the driving source that generates the driving force for closing and moving the shutter curtain as compared with the conventional shutter device.

  Moreover, in this embodiment, the electric power supplied to the DC motor 14 is not the one obtained by converting the commercial power source into DC, but only the disaster prevention signal BS which is a DC voltage signal.

  For this reason, according to the present embodiment, the disaster prevention signal BS can be used effectively, and it is not necessary to prepare a separate power facility for supplying to the DC motor 14, so that the shutter device is compared with the conventional shutter device. Simplification of the structure and cost reduction can be achieved.

  Further, as described above, in this embodiment, the shutter curtain 1 is prevented from being fed out from the winding shaft 6 by the return spring force of the return spring 46 from the fully open position Y1 to the midway position Y2. Yes.

  For this reason, according to the present embodiment, a fully open holding device for holding the shutter curtain 1 in a fully open state or a substantially fully open state is not necessary, and also in this respect, the structure can be simplified compared to the conventional shutter device. Cost can be reduced.

  Further, according to the present embodiment, when the shutter curtain 1 is held in the fully open state or the substantially fully open state, even if the chain 12 constituting the power transmission means 11 may break due to aging deterioration or the like, the shutter curtain 1 is maintained in the fully open state or the substantially fully open state by the return spring force of the return spring 46. That is, according to this embodiment, the return spring force of the return spring 46 prevents the shutter curtain 1 from falling due to the chain 12 being broken.

  Even if the chain 12 is broken when the shutter curtain 1 is closed and moved from the fully open position Y1 to the halfway position Y2, the shutter curtain 1 is prevented from falling by the return spring force accumulated in the return spring 46. .

  Further, in the present embodiment, after the shutter curtain 1 is fed from the winding shaft 6 to the midway position Y2, the shutter curtain 1 is lowered by its own weight until reaching the fully closed position Y3. During the self-weight drop, as described above, the closing movement speed of the shutter curtain 1 is kept substantially constant by the cogging torque generated by the DC motor 14. In other words, the rotational speed of the winding shaft 6 is adjusted to be substantially constant by the cogging torque generated by the DC motor 14.

  For this reason, according to this embodiment, it is not necessary to provide a braking device such as a governor brake for adjusting the closing movement speed of the shutter curtain 1 to be substantially constant on the take-up shaft 6 or the like. Thus, the structure can be simplified and the cost can be reduced.

  In the present embodiment, a braking device such as the governor brake may be separately provided on the take-up shaft 6 or the like in order to more reliably perform the braking against the closing movement of the shutter curtain 1.

  In this embodiment, when the shutter curtain 1 is opened and moved manually, power is not supplied to the DC motor 14, so that the cogging torque is generated in the DC motor 14 even during the opening movement of the shutter curtain 1. To do. For this reason, the opening movement speed of the shutter curtain 1 is also adjusted to be substantially constant. As a result, when the shutter curtain 1 reaches the fully open position Y1, the seat plate 1A of the shutter curtain 1 strongly collides with the lintel and is damaged. Is prevented. Thus, in the present embodiment, the cogging torque of the DC motor 14 also serves as a braking means for braking the opening movement of the shutter curtain 1.

  6 and 7 show a second embodiment of the motor drive circuit. FIG. 6 is a diagram illustrating a circuit state when the disaster prevention signal BS is input to the motor drive circuit 150 according to the present embodiment. FIG. 7 illustrates that the disaster prevention signal BS is not input to the motor drive circuit 150. It is a figure which shows the circuit state at the time. Note that, in each embodiment described below, the same reference numerals are used for members, devices, and the like that are the same as or have the same functions as the members, devices, and the like described above, and descriptions thereof are omitted.

  As shown in FIG. 6, the motor drive circuit 150 according to the present embodiment includes a variable resistor 54 and an electromagnetic relay 53 that are disposed between a plus terminal 51 and a minus terminal 52 that are terminals of the DC motor 14. Three diodes 55, 56 and 57 are included. The electromagnetic relay 53 having the coil portion 53A and the switch portion 53B is a B-contact type electromagnetic relay that opens (turns off) when the current flows through the coil portion 53A.

  As shown in FIG. 6, when the disaster prevention signal BS is input to the plus terminal 51 in an emergency such as the occurrence of a fire, a current I1 flows through the DC motor 14 connected to the motor drive circuit 150. On the other hand, since the current I2 flows through the coil portion 53A of the electromagnetic relay 53, the switch portion 53B of the electromagnetic relay 53 opens, so that no current flows through the variable resistor 54. On the other hand, the DC motor 14 into which the current I1 has flown starts to drive, whereby the winding shaft 6 rotates in the forward direction and the shutter curtain 1 starts to move down.

  Thereafter, as shown in FIG. 7, when the disaster prevention signal BS is not input to the positive terminal 51, no current flows through the coil portion 53A of the electromagnetic relay 53, so that the switch portion 53B of the electromagnetic relay 53 is closed (ON). Become). Further, since no current flows to the DC motor 14, the DC motor 14 does not operate as a motor. However, the rotation of the winding shaft 6 is transmitted to the drive shaft 14 A of the DC motor 14 by the power transmission means 11. Therefore, the drive shaft 14A of the DC motor 14 continues to rotate. Thereby, the DC motor 14 after the disaster prevention signal BS is not input is operated as a generator.

  As shown in FIG. 7, a current I3 flows from the DC motor 14 that operates as a generator. The direction of the current I3 is the current I1 that flows to operate the DC motor 14 as a motor (see FIG. 6). The direction is opposite to the direction. Further, the current I3 does not flow to the positive terminal 51 side or the coil portion 53A of the electromagnetic relay 53 due to the presence of the two diodes 55 and 56 disposed in the motor drive circuit 150. Therefore, the current I3 flows into the variable resistor 54.

  For this reason, the DC motor 14 when the disaster prevention signal BS is no longer input operates as a generator that consumes the kinetic energy of the closing movement of the shutter curtain 1 by the generation of electric power. When the disaster prevention signal BS is no longer input, the motor drive circuit 150 includes a DC motor 14 that operates as a generator and a variable resistor that is a power consuming means for consuming the power generated by the DC motor 14. 54. The braking circuit is configured to include 54. That is, in the present embodiment, the motor drive circuit 150 is a braking circuit that is a braking means for braking the closing movement of the shutter curtain 1. Thereby, the closing moving speed of the shutter curtain 1 during its own weight drop is adjusted to be constant.

  In the present embodiment, the braking force as the generator can be adjusted by adjusting the resistance value of the variable resistor 54. In the present embodiment, the resistor disposed in the motor drive circuit 150 is a variable resistor, but may be a fixed resistor.

  Although not shown, when the shutter curtain 1 reaching the fully closed position Y3 is opened and moved, the DC motor 14 in a state where the disaster prevention signal BS is not input tries to operate as a generator, and this DC motor 14, a current in the direction opposite to the direction of the current I3 shown in FIG. However, this current does not flow through the motor drive circuit 150 due to the presence of the three diodes 55, 56, and 57 arranged in the motor drive circuit 150. For this reason, the DC motor 14 does not operate as a generator.

  8 and 9 show a third embodiment of the motor drive circuit. As shown in FIG. 8, the motor drive circuit 250 according to the present embodiment is electrically driven to open and close the shutter curtain 1 in the motor drive circuit 150 according to the second embodiment shown in FIGS. 6 and 7. Can also be done. That is, the motor drive circuit 250 according to the present embodiment has an electric opening / closing control circuit 59 for performing the electric opening / closing control of the shutter curtain 1 to the motor driving circuit 150 according to the second embodiment shown in FIGS. 6 and 7. And a contact 58 controlled by the electric opening / closing control circuit 59 is added.

  As shown in FIG. 9, the contact point 58 is controlled by the electric switching control circuit 59, and the DC motor 14 is controlled by the electric switching control circuit 59 while the electric switching control circuit 59 and the DC motor 14 are connected. Become so. In other words, when the opening / closing instruction of the shutter curtain 1 is instructed to the electric opening / closing control circuit 59 by an operation instruction means (not shown), the electric opening / closing control circuit 59 controls the contact point 58 to control the electric opening / closing control circuit 59 itself and the DC motor 14. In this state, electric power is supplied from the electric switching control circuit 59 to the DC motor 14 to drive the DC motor 14. On the other hand, when the movement of the shutter curtain 1 is stopped by a limit signal or a stop instruction from the operation instruction means, the electric opening / closing control circuit 59 stops the power supply to the DC motor 14 and stops driving the DC motor 14. Then, the contact 58 is controlled to release the connection between the electric switching control circuit 59 and the DC motor 14.

  Therefore, the operation of the motor drive circuit 250 in a state where the electric opening / closing control circuit 59 and the DC motor 14 are not connected is the operation of the motor drive circuit 150 according to the second embodiment shown in FIGS. 6 and 7 described above. Since it becomes the same, description is abbreviate | omitted.

  When the electric opening / closing control circuit 59 and the DC motor 14 are connected, the electric opening / closing control circuit 59 connected to the commercial power source 60 converts the power supplied from the commercial power source 90 from alternating current to direct current. The power is converted to a polarity corresponding to the open / closed control (for example, positive for “closed”, negative for “open”, etc.), and then the converted power is supplied to the DC motor 14. Thus, when the control by the electric opening / closing control circuit 59 is “closed”, the current I4 (current in the same direction as the current I1 shown in FIG. 8) flows through the DC motor 14, and the shutter curtain 1 is closed electrically. Do. On the other hand, when the control by the electric opening / closing control circuit 59 is “open”, a current I5 (current in a direction opposite to the current I1) flows through the DC motor 14, and the shutter curtain 1 is moved electrically.

  10 and 11 show a fourth embodiment of the motor drive circuit.

  As shown in FIG. 10, the motor drive circuit 350 according to this embodiment is a DC motor 14 that operates as a generator in the motor drive circuit 150 according to the second embodiment shown in FIGS. The braking force with respect to the closing movement of the shutter curtain 1 is adjusted according to the power consumption capability of the power consumption means corresponding to the generated electromotive force. Hereinafter, differences from the embodiment of FIGS. 6 and 7 will be described.

  In the second embodiment shown in FIGS. 6 and 7, the power consuming means arranged in the motor drive circuit 150 is one variable resistor 54, but as shown in FIG. In the motor drive circuit 350 according to this embodiment, two variable resistors 61 and 62 are arranged in parallel with each other. The electric resistance values of the variable resistor 61 that is the first resistor and the variable resistor 62 that is the second resistor are set to be smaller in the variable resistor 62 than in the variable resistor 61. For this reason, the variable resistor 61 and the variable resistor 62 are two power consumption means having different power consumption capabilities from each other in the present embodiment.

  Further, as shown in FIG. 10, a C contact type in which the switching contact is a C contact (switching contact) between the variable resistors 61 and 62 and the switch portion 53 </ b> B of the electromagnetic relay 53. The switch part 63B of the electromagnetic relay 63 is disposed. The switch part 63B normally closes the contact part on the variable resistor 61 side, and when the coil part 63A of the electromagnetic relay 63 is excited, the variable resistor The contact portion on the 62 side is closed.

  An excitation circuit 351 that is connected to the coil portion 63A of the electromagnetic relay 63 and excites the coil portion 63A generates an electromotive force generated by the DC motor 14 when the DC motor 14 is operating as a generator. An electromotive force measuring means 71 for measuring, a control device 72 (having an MPU, a memory, etc.) to which a signal related to the electromotive force measured by the electromotive force measuring means 71 is input, and a power source 74 (DC 12 V power source in the illustrated example) A power switch 73 (a transistor in the illustrated example) that selectively supplies or does not supply power from the power source 74 to the coil portion 63A of the electromagnetic relay 63 is provided.

  The power switch 73 is configured such that when the DC motor 14 is operating as a generator, the electromotive force generated by the DC motor 14 when the closing movement speed of the shutter curtain 1 during its own weight drop is gradually increased. When the upper limit value is exceeded, the electric power of the power source 74 is supplied to the coil portion 63A of the electromagnetic relay 63 by a signal from the control device 72 in which the upper limit value is stored. As a result, the coil portion 63A is excited, so that the switch portion 63B of the electromagnetic relay 63 that has closed the contact portion on the variable resistor 61 side closes the contact portion on the variable resistor 62 side. As described above, since the electric resistance value of the variable resistor 62 is smaller than the electric resistance value of the variable resistor 61, the power consumption capacity of the DC motor 14 operating as a generator is increased. The braking power as a generator is also increased.

  Thereafter, the closing movement speed of the shutter curtain 1 gradually decelerates due to the increased braking force, so that the amount of power generated by the DC motor 14 operating as a generator falls below a predetermined lower limit value. Sometimes, the power supplied from the power source 74 to the coil portion 63A of the electromagnetic relay 63 is cut off by a signal from the control device 72 in which the lower limit value is stored. As a result, the coil portion 63A is not excited, so that the switch portion 63B of the electromagnetic relay 63 that closed the contact portion on the variable resistor 62 side closes the contact portion on the variable resistor 61 side, and is in a normal state. Return to. Thereby, the power consumption capability of the DC motor 14 operating as a generator is reduced, and the braking force as a generator is also reduced.

  As described above, also in the present embodiment, the motor drive circuit 350 in a state where the disaster prevention signal BS is not input is a braking circuit for braking the closing movement of the shutter curtain 1.

  12 and 13 are flowcharts of the operation of the shutter device including the motor drive circuit 350 according to the present embodiment in an emergency such as a fire.

  As shown in FIG. 12, when the disaster prevention signal BS is not input from the disaster prevention panel to the motor drive circuit 350 of the control device 15 (step S101-NO), power is not supplied to the DC motor 14, The shutter curtain 1 is held in the fully open state or the substantially fully open state by the return spring force accumulated in the return spring 46.

  On the other hand, when the disaster prevention signal BS is input to the motor drive circuit 350 of the control device 15 (step S101—YES), a part of the disaster prevention signal BS input to the plus terminal 51 of the motor drive circuit 350 is converted to the electromagnetic relay 53. Since the current I2 flows into the coil portion 53A (see FIG. 10), the coil portion 53A is excited and the electromagnetic relay 53 is turned off (step S102). That is, the switch part 53B which is the B contact of the electromagnetic relay 53 is turned off (opened).

  As a result, the remainder of the disaster prevention signal BS does not flow into the two variable resistors 61 and 62 but flows into the DC motor 14 as the current I1 (see FIG. 10), so that the DC motor 14 starts driving (step) S103). As a result, the take-up shaft 6 is rotated forward by the driving force generated by the DC motor 14, and the shutter curtain 1 starts electric lowering (step S104).

  Thereafter, when the input of the disaster prevention signal BS is continued (YES in Step S105), the process returns to the processing after Step S103, and the electric descent of the shutter curtain 1 is continued. That is, the electric descent of the shutter curtain 1 is continued while the input of the disaster prevention signal BS is continued.

  On the other hand, when the disaster prevention signal BS is no longer input (step S105-NO), the current I2 does not flow through the coil portion 53A of the electromagnetic relay 53, so the coil portion 53A returns to the original non-excitation state, The electromagnetic relay 53 is turned on (see FIG. 11) (step S106). That is, the switch part 53B which is the B contact of the electromagnetic relay 53 is turned on (closed).

  Further, since the current I1 does not flow through the DC motor 14, the driving of the DC motor 14 is stopped (step S107).

  At this time, as described above, the shutter curtain 1 is closed and moved to at least a halfway position Y2 (see FIGS. 1 and 3) of the movement path L, and from this halfway position Y2 to the fully closed position Y3. The self-weight torque of the shutter curtain 1 is larger than the spring torque of the return spring 46 (see FIG. 3). For this reason, the shutter curtain 1 has a torque around the winding shaft 6 due to a downward closing moving force based on its own weight until the shutter curtain 1 reaches the fully closed position Y3 from the position where the driving of the DC motor 14 is stopped. The closing movement is performed with (self-weight torque) (step S108).

  In the present embodiment, after the supply of power to the DC motor 14 (input of the disaster prevention signal BS) is stopped, the winding shaft 6 is rotated by the reeling out of the winding shaft 6 based on the own weight torque of the shutter curtain 1. The force (torque) is transmitted to the drive shaft 14A of the DC motor 14 via the power transmission means 11 (see FIG. 2), and the drive shaft 14A continues to rotate forward, so that the DC motor 14 operates as a generator. To come. Thereby, the shutter curtain 1 performs its own weight drop while receiving braking by the power generation braking force of the DC motor 14.

  During the weight drop of the shutter curtain 1, the electromotive force measured by the electromotive force measuring means 71 by the control device 72, that is, the electromotive force generated by the DC motor 14 due to the positive rotation of the winding shaft 6 (hereinafter referred to as DC motor 14). Is determined (step S109).

  In step S109, when the electromotive force of the DC motor 14 is equal to or less than the predetermined upper limit value, the process returns to step S108. During the weight drop of the shutter curtain 1 in step S108, the switch part 63B of the electromagnetic relay 63 closes the contact part on the variable resistor 61 side, and the power generation braking force by the DC motor 14 is small. The curtain 1 performs a closed movement (self-weight drop) while the moving speed is gradually accelerated.

  On the other hand, in step S109, when the electromotive force of the DC motor 14 is a large value exceeding the predetermined upper limit value (step S109-YES), the power switch 73 is switched from the power source 74 by a signal from the control device 72. Is supplied to the coil portion 63A of the electromagnetic relay 63 so that the coil portion 63A is excited. Therefore, the switch portion 63B of the electromagnetic relay 63 that has closed the contact portion on the variable resistor 61 side In S110, the contact portion on the variable resistor 62 side is closed (the electromagnetic relay 63 is turned on). That is, in step S110, the switch unit 63B of the electromagnetic relay 63 switches the variable resistor connected to the DC motor 14 from the variable resistor 61 having a large electrical resistance value to the variable resistor 62 having a small electrical resistance value. It has become.

  As a result, the power consumption capacity of the DC motor 14 is further increased, and the rotational speed of the forward rotation of the take-up shaft 6 is reduced by the increase in the power generation braking force of the DC motor 14, and the closing movement speed of the shutter curtain 1 is The vehicle is decelerated (step S111).

  Thereafter, the determination of the electromotive force of the DC motor 14 is performed again (step S112). In step S112, when the electromotive force of the DC motor 14 is equal to or greater than the predetermined lower limit (step S112—NO), the process returns to step S111, and the shutter moving speed of the shutter curtain 1 is continuously decelerated.

  On the other hand, in step S112, when the electromotive force of the DC motor 14 falls below the predetermined lower limit due to a decrease in the rotation speed of the winding shaft 6 (step S112—YES), a signal from the control device 72 The power switch 73 shuts off the power source 74 that supplies power to the coil portion 63 </ b> A of the electromagnetic relay 63. As a result, the coil portion 63A that has been excited is in a non-excited state, and therefore the switch portion 63B of the electromagnetic relay 63 that has closed the contact portion on the variable resistor 62 side is switched to the variable resistor 61 side in step S113. The contact portion is closed (the electromagnetic relay 63 is turned off). That is, in step S113, the switch unit 63B of the electromagnetic relay 63 switches the variable resistor connected to the DC motor 14 from the variable resistor 62 having a small electric resistance value to the variable resistor 61 having a large electric resistance value. It has become.

  As a result, the power consumption capability of the DC motor 14 is further reduced, and the power generation braking force by the DC motor 14 is reduced. Therefore, the rotational speed of the winding shaft 6 is increased, and the shutter curtain 1 The closing moving speed is increased and the process returns to step S108.

  Therefore, according to the present embodiment, the shutter curtain 1 is configured such that the switch unit 63B of the electromagnetic relay 63 selectively switches between the variable resistor 61 and the variable resistor 62 according to the electromotive force of the DC motor 14. The self-weight descends at a closing moving speed within a certain range until reaching the fully closed position Y3.

  For this reason, in the present embodiment, the electromagnetic relay 63 connects one of the two variable resistors 61 and 62 from the electromotive force measuring means 71 in accordance with the electromotive force measured by the electromotive force measuring means 71. The control device 72, which is a control means for inputting the above signal, serves as a selection switch means for selectively connecting to the DC motor 14.

  In the present embodiment, the predetermined upper limit value and lower limit value of the electromotive force set in a memory (not shown) of the control device 72 may be the same value.

  In the present embodiment, when the shutter curtain 1 is opened and moved, the DC motor 14 to which the disaster prevention signal BS is not input is the reverse rotation of the winding shaft 6 that winds up the shutter curtain 1, and the drive shaft 14A of the DC motor 14 is also rotated. By rotating in the reverse direction, the motor tries to operate as a generator, and the motor drive circuit 350 tries to flow a current in the direction opposite to the current I3 shown in FIG. The presence of the diodes 55, 56, 57 prevents the motor drive circuit 350 from flowing. For this reason, the DC motor 14 does not operate as a generator, and can be performed with a light force when the shutter curtain 1 is moved by hand.

  In the present embodiment, the closing movement speed of the shutter curtain 1 is adjusted within a predetermined range in accordance with the switching of the power consumption capability of the power consuming means according to the electromotive force generated in the DC motor 14. However, the take-up shaft 6 is provided with take-up shaft rotation speed detecting means such as a rotary encoder for detecting the take-up speed of the take-up shaft 6, and the rotation speed of the take-up shaft 6 detected by the detection means is adjusted. Accordingly, the closing movement speed of the shutter curtain 1 may be adjusted within a predetermined range.

  FIG. 14 is a diagram showing an overall view of the shutter device according to the embodiment provided with the obstacle sensing means for sensing the obstacle during the closing movement of the shutter curtain 1. FIG. 15 is a side sectional view of the obstacle sensing means 29 shown in FIG. 14 (cross-sectional view in a direction perpendicular to the width direction which is the left-right direction of the shutter curtain 1). FIG. 16 is a diagram showing a state immediately before sensing 100, and FIG. 16 is a diagram showing a state where the obstacle sensing means 29 shown in FIG.

  The obstacle sensing means 29 according to the present embodiment is a contact type obstacle sensing means for sensing an obstacle by directly contacting the obstacle. As shown in FIG. Is provided below the seat plate 20 of the shutter curtain 1. As shown in FIG. 15, the lower portion of the seat plate 20 includes a horizontal portion 20 </ b> A and a width direction of the horizontal portion 20 </ b> A (in other words, a direction perpendicular to the width direction of the shutter curtain 1. (Thickness direction) a frame member having a vertical extending portion 20B extending vertically downward from both ends, and a horizontal extending portion 20C extending horizontally inward in the width direction from the tip of each vertical extending portion 20B It has become.

  On the other hand, the obstacle sensing means 29 includes a moving member 22 that is movable up and down, which is the opening / closing movement direction of the shutter curtain 1, a push button type micro switch 26 in which the actuator is a push button 26A, and the moving member 22. A leaf spring 23 having a length in the vertical direction, and a lead wire 27 for connecting the control device 15 for controlling the DC motor 14 and the micro switch 26. It is configured to include.

  The lower end portion of the lead wire 27 that can be housed in the cord reel 28 shown in FIG. 14 having a mainspring spring inside is a cover formed with a hole 25A through which the lead wire 27 can be inserted as shown in FIG. The upper end of the lead wire 27 is connected to the control device 15 while being connected to the microswitch 26 covered with the member 25. The lead wire 27 is fed out (closed and moved) from the take-up shaft 6 and the cord reel 28 and the shutter curtain 1 is taken up (moved open) from the take-up shaft 6. The cord reel 28 is wound up.

  As shown in FIG. 15, the moving member 22 has a horizontal portion 22 </ b> A and a width direction of the horizontal portion 22 </ b> A (in other words, a thickness direction of the shutter curtain 1 that is a direction orthogonal to the width direction of the shutter curtain 1). The frame member has a vertically extending portion 22B that extends vertically upward and a horizontally extending portion 22C that extends horizontally outward from the tip of the vertically extending portion 22B in the width direction. The moving member 22 has a vertically extending portion 22B and a horizontally extending portion 22C that are movable in the opening / closing movement direction (vertical direction) of the shutter curtain 8 in the internal space 21 of the seat plate 20, and the horizontally extending portion. 22C is attached to the seat plate 20 so that it can be placed on the upper surface of the horizontally extending portion 20C of the seat plate 20. The maximum moving range of the moving member 22 is L3.

  The micro switch 26 is attached to the horizontal portion 20A of the seat plate 20, and a push button 26A as an actuator is provided so as to protrude downward from the micro switch 26, and is in the vertical direction (opening / closing of the shutter curtain 1). (Moving direction). In the micro switch 26, when the push button 26A is pushed (in an immersive state), the contact portion with the lead wire 27 is closed (on state), and the push button 26A is not pushed (projected). The contact portion with the lead wire 27 is opened (off state). That is, the microswitch 26 is an A-contact type push button switch.

  The plate spring 23 having a length in the vertical direction is inserted through a long hole 20D formed in the horizontal portion 20A of the seat plate 20. The lower end portion of the leaf spring 23 is locked by a locking member 24 attached to the inside of the moving member 22, and the upper end portion is a wide portion 23 </ b> A that contacts the push button 26 </ b> A of the micro switch 26. It is possible.

  Therefore, the leaf spring 23 is a transmission member for transmitting the movement of the moving member 22 to the micro switch 26, and the micro switch 26 is a sensing unit for sensing the movement of the moving member 22.

  In the present embodiment, as shown in FIG. 16, the moving member 22 is shown in FIG. 15 as long as the moving member 22 does not move in the opening movement direction (upward direction) of the shutter curtain 1 by contacting the obstacle 100. As shown, the horizontal extending portion 22 </ b> C is placed on the upper surface of the horizontal extending portion 20 </ b> C of the seat plate 20 and is suspended from the seat plate 20. At this time, the leaf spring 23 is in a state of extending straight in the vertical direction, which is the opening / closing movement direction of the shutter curtain 1. That is, in the present embodiment, the leaf spring 23 extends straight up and down, which is the opening / closing movement direction of the shutter curtain 1, as long as there is an obstacle on the floor surface 2 </ b> A and the moving member 22 does not contact the obstacle. It is in a state. In other words, regardless of whether or not the shutter curtain 1 has reached the fully open position Y1, when there is no obstacle on the floor 2A or the like, the leaf spring 23 is in the vertical direction, which is the opening / closing movement direction of the shutter curtain 1 It is in a state of extending straight.

  On the other hand, as shown in FIG. 15, during the closing movement of the shutter curtain 1 in the arrow Y direction, as shown in FIG. 16, the obstacle 100 exists on the floor surface 2 </ b> A or the like, and the moving member 22 becomes the obstacle 100. When the plate spring 23 is in contact with the leaf spring 23, the leaf spring 23 extending straight in the up-down direction is bent when the moving member 22 moves upward (the direction opposite to the arrow Y direction in FIG. 15), and the The push button 26A of the switch 26 is pushed up. As a result, the contact portion between the microswitch 26 and the lead wire 27 is closed (ON state), and the obstacle sensing means 29 is in a state of sensing an obstacle.

  Thus, in other words, the seat plate 20 of the shutter curtain 1 in the present embodiment is, in other words, the seat plate 20 serving as the seat plate main body and the moving member constituting a part of the contact type obstacle sensing means 29. 22 is a so-called long stroke seat plate. On the other hand, the contact type obstacle sensing means 29 provided on the seat plate 20 is a flexible contact type obstacle sensing means.

  17 and 18 show a fifth embodiment of the motor drive circuit to which the lead wire 27 constituting the obstacle sensing means 29 is connected.

  The motor drive circuit 450 according to the present embodiment is a DC motor 14 that operates as a generator during the closing movement of the shutter curtain 1, similarly to the motor drive circuit 350 according to the fourth embodiment shown in FIGS. 10 and 11. This embodiment includes members such as an electromotive force measuring means 71 and a braking device 72 for adjusting the power generation braking force for braking the closing movement speed of the shutter curtain 1 according to the electromotive force generated. Then, the power consuming means for consuming the electric power generated by the DC motor 14 is one variable resistor 54 as in the motor driving circuit 150 according to the second embodiment shown in FIGS. 6 and 7. ing.

  For this reason, also in this embodiment, the motor drive circuit 450 in a state where the disaster prevention signal BS is not input is a braking circuit for braking the closing movement of the shutter curtain 1.

  Further, in the motor drive circuit 450 according to the present embodiment, lead wires 27 connected to the micro switch 26 attached to the horizontal portion 20A of the seat plate 20 are connected to both terminals of the DC motor 14, respectively. Yes.

  For this reason, as shown in FIG. 16, when the moving member 22 abuts on the obstacle 100, the leaf spring 23 extending straight up and down is deflected by moving the moving member 22 upward. The push button 26A of the micro switch 26 is pushed up. As a result, as described above, as shown in FIG. 18, the contact portion between the microswitch 26 and the lead wire 27 is closed (ON state), and the motor drive circuit 450 has a microswitch as a switch means. 26 and the lead wire 27 are formed, and a short circuit 75 which is a short circuit means is formed. For this reason, the current I3 generated from the DC motor 14 operating as a generator flows through the short circuit 75, so that the power generation braking force by the DC motor 14 operating as a generator is maximized. As a result, the maximum braking force is applied to the closing movement of the shutter curtain 1, and the closing movement speed of the shutter curtain 1 is greatly reduced.

  For this reason, according to the present embodiment, the impact force received by the obstacle 100 in contact with the seat plate 20 of the shutter curtain 1 can be further reduced.

  As described above, the obstacle sensing means 29 according to the present embodiment does not require a power source for sensing the obstacle 100, and has a simple structure and is difficult to break down. It will be cheap.

  19 and 20 show a sixth embodiment of the motor drive circuit. As shown in FIG. 19, the motor drive circuit 550 according to the present embodiment is a variable power consumption means arranged in the motor drive circuit 150 according to the second embodiment shown in FIGS. 6 and 7. The resistor 54 is replaced with a buzzer 76 which is a notification means for notifying the movement of the shutter curtain 1.

  For this reason, also in this embodiment, the motor drive circuit 550 in a state where the disaster prevention signal BS is not input is a braking circuit for braking the closing movement of the shutter curtain 1.

  In the present embodiment, as shown in FIG. 20, the buzzer 76 that is a notification means uses the electric power generated by the DC motor 14 to notify the weight drop (closed movement) of the shutter curtain 1 and the DC motor 14. It becomes a power consuming means for consuming the power generated in.

  For this reason, according to the present embodiment, it becomes possible for an outside person to know that the shutter curtain 1 is descending in an emergency such as a fire.

  In the present embodiment, the notification means is a buzzer, but it may be an acoustic instrument that outputs a sound such as a synthesized sound, or may be an electric lamp that outputs a red light, a yellow light, or the like. May be.

  FIG. 21 is an overall front view of a shutter device provided with a seventh embodiment of the motor drive circuit, and FIG. 22 shows a seventh embodiment of the motor drive circuit.

  As shown in FIG. 21, in the present embodiment, the fully open position Y1 is reached at the midway position Y2 of the movement path of the shutter curtain 1 inside one of the left and right guide rails 4. When the shutter curtain 1 has been lowered to the midway position Y2, a detection switch 30 serving as a position detecting means that is actuated by the shutter curtain 1 is accommodated.

  In the present embodiment, the detection switch 30 closes the motor drive circuit 650 of the control device 15 shown in FIG. 22 until the shutter curtain 1 that has reached the fully open position Y1 is lowered (closed) to the intermediate position Y2. The switch is in the (switch-on) state and becomes a B contact type (break contact type) switch that opens the motor drive circuit 650 shown in FIG. ing. When the shutter curtain 1 that has reached the fully closed position Y1 is raised (opened) to a position higher than the midway position Y2, the detection switch 30 sets the motor drive circuit 650 in the open state to the closed state. It is supposed to be. The detection switch 30 may be arranged outside the guide rail 4. The detection switch 30 only needs to be able to detect whether the position of the shutter curtain 1 is the open side (open side) or the closed side (close side) from the midway position Y2, for example, the rotation speed of the winding shaft 6 May be used, and the output contact may be switched on / off with a predetermined value.

  For this reason, according to the present embodiment, even if the occurrence of the disaster prevention signal BS continues even after the shutter curtain 1 is lowered from the fully open position Y1 to the midway position Y2, the detection provided on the guide rail 4 is performed. Since the motor drive circuit 650 is in an open circuit state by the operation of the switch 30, after the shutter curtain 1 is lowered to the halfway position Y2, the shutter curtain 1 receives braking by the cogging torque of the DC motor 14, Descent by its own weight at a constant movement speed.

  Thus, also in this embodiment, the movement from the fully open position Y1 to the midway position Y2 in the movement path L of the shutter curtain 1 is performed by the driving force generated by the DC motor 14, and the shutter curtain 1 is moved from the fully open position Y1. The movement from the halfway position Y2 to the fully closed position Y3, which is the closing movement limit position of the shutter curtain 1, is caused by the weight of the shutter curtain 1 that is an urging force other than the driving force generated by the DC motor 14. This is performed with a torque around the winding shaft 6 due to the downward closing movement force.

  In each of the embodiments described above, the disaster prevention signal BS is a DC voltage signal having a constant voltage, but may be a pulsed DC signal that continues for a predetermined time. Also in this case, the time for generating the pulse signal is the time for the shutter curtain 1 to move from the fully open position Y1 to the intermediate position Y2 by being drawn out from the winding shaft 6 rotated by the driving force generated by the DC motor 14 and closed. It is necessary to become.

  Moreover, in each embodiment demonstrated above, although the disaster prevention signal output from the disaster prevention board was utilized as electric power for driving the DC motor 14, power supplies, such as a battery (battery), without going through a disaster prevention board You may make it utilize the disaster prevention signal output from the smoke sensor (smoke detection sensor) which connected to directly.

  In each of the embodiments described above, even if the shutter curtain 1 is stopped halfway between the halfway position Y2 and the fully closed position Y3 in the movement path L of the shutter curtain 1, the shutter curtain 1 is fully closed by its own weight. On the other hand, even if the shutter curtain 1 is stopped halfway between the fully open position Y1 and the halfway position Y2 in the movement path L of the shutter curtain 1, the shutter curtain 1 is returned to the return spring 46 by the accumulated pressure. As a result, it rises to the fully open position Y1. For this reason, in the above case, in order to stop the shutter curtain 1 on the way, a brake means for applying a brake to the DC motor 14 may be provided.

  Further, in each of the embodiments described above, the shutter curtain is more reliably considered in consideration of the case where the return spring 46 holding the shutter curtain 1 in the fully open state or the substantially fully open state is damaged by the accumulated return spring force. In order to hold 1 in the fully open state or substantially fully open state, a fully open holding device (which may brake the DC motor 14) may be provided separately. In this case, after the disaster prevention signal BS is input, it is necessary to release the fully opened holding state of the shutter curtain 1 by the fully opened holding device.

  INDUSTRIAL APPLICABILITY The present invention can be used for an opening / closing device including a driving source that generates a driving force for moving the opening / closing body.

It is a front view which shows the whole disaster prevention shutter apparatus used as the opening / closing apparatus which concerns on one Embodiment of this invention. It is sectional drawing which shows the internal structure of the winding shaft which winds up and draws out the shutter curtain which is an opening / closing body. It is a graph which shows the relationship between the rotation speed of the winding shaft which winds up the return spring which is a return elastic member arrange | positioned inside the winding shaft, and the torque around this winding shaft. It is a figure which shows 1st Embodiment of the motor drive circuit for driving the direct-current motor which is a drive source. It is a flowchart figure which shows operation | movement of the shutter apparatus which concerns on embodiment of FIG. It is a figure which shows 2nd Embodiment of a motor drive circuit, Comprising: It is a figure which shows what also serves as the braking circuit for braking the closing movement of a shutter curtain. FIG. 7 is a diagram showing a circuit state when a DC motor is operating as a generator in the motor drive circuit shown in FIG. 6. FIG. 7 is a diagram showing a third embodiment of the motor drive circuit, and is a diagram showing the motor drive circuit shown in FIG. 6 provided with an electric opening / closing control circuit for electrically controlling opening / closing of the shutter curtain. FIG. 9 is a diagram showing a circuit state when the shutter curtain is electrically controlled to be opened and closed in the motor drive circuit shown in FIG. 8. It is a figure which shows 4th Embodiment of a motor drive circuit, Comprising: It is a figure similar to FIG. 6 which shows what also serves as a braking circuit. In the motor drive circuit shown in FIG. 10, it is a figure similar to FIG. 7 which shows a circuit state when the DC motor is operate | moving as a generator. It is a flowchart figure which shows operation | movement of the shutter apparatus provided with the motor drive circuit shown in FIG. It is a figure which shows the continuation of the flowchart figure shown in FIG. It is a figure similar to FIG. 1 which shows the whole shutter apparatus which concerns on embodiment provided with the obstacle detection means. It is sectional drawing which shows the internal structure of the obstruction detection means shown in FIG. It is a figure which shows when the obstruction is detected by the obstruction detection means shown in FIG. It is a figure which shows 5th Embodiment of a motor drive circuit, Comprising: It is a figure similar to FIG. 10 which shows what provided the short circuit which is a short circuit means also as a braking circuit. FIG. 18 is a view similar to FIG. 11 showing a circuit state when the DC motor is operating as a generator in the motor drive circuit shown in FIG. 17 and an obstacle is sensed by the obstacle sensing means. . It is a figure which shows 6th Embodiment of a motor drive circuit, Comprising: It is a figure which shows what also serves as a braking circuit and the electric power consumption means is a buzzer which is an alerting | reporting means. In the motor drive circuit shown in FIG. 19, it is the same figure as FIG. 7 which shows a circuit state when the DC motor is operate | moving as a generator. FIG. 2 is a view similar to FIG. 1 showing the entire embodiment of the shutter device according to the embodiment of FIG. 1 in which the position detection means is provided in the middle of the movement path of the shutter curtain. It is the same figure as FIG. 4 which shows 7th Embodiment of the motor drive circuit with which the shutter apparatus shown in FIG. 21 was equipped.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shutter curtain which is an opening / closing body 6 Winding shaft 14 DC motor which is a drive source 11 Power transmission means 29 Obstacle detection means 46 Return spring which is a return elastic member 54 Variable resistors 61 and 62 which are power consumption means Mutual power consumption A plurality of power consuming means having different capacities, variable resistors having different electric resistance values 63 electromagnetic relays serving as selection switch means 71 electromotive force measuring means 72 control device being a control means for inputting a signal from the electromotive force measuring means 75 Short circuit as short-circuit means 76 Buzzer as notification means 150, 250, 350, 450, 550 Braking circuit that also serves as motor drive circuit A Torque around winding shaft due to return spring force of return spring B Based on weight of shutter curtain Torque around winding shaft due to downward closing movement force BS Disaster prevention signal L Shutter curtain The fully closed position is any closed movement limit position of the middle position Y3 shutter curtain is stopped position of the moving path Y1 shutter curtain fully open position Y2 shutter curtain is moved limit position open

Claims (12)

  An opening / closing body that can be opened and closed, and a drive source that generates a driving force for moving the opening / closing body, to a position separated by a predetermined distance from an arbitrary stop position in the movement path of the opening / closing body The movement of the opening / closing body until the predetermined time elapses from the arbitrary stop position is performed by the driving force generated by the driving source, and the opening / closing body has moved to a position separated by the predetermined distance. The opening / closing body is moved to the movement limit position of the opening / closing body after or after the opening / closing body moves until the predetermined time elapses by an urging force other than the driving force generated by the driving source. A switchgear characterized by that.   2. The opening / closing apparatus according to claim 1, wherein the movement of the opening / closing body is performed by the driving force generated by the driving source because the opening / closing body is separated by a predetermined distance from a fully opened position or a substantially fully opened position in the moving path of the opening / closing body. An opening / closing device characterized in that the opening / closing device is a closing movement to a closed position, or a closing movement until the predetermined time elapses from the fully opened position or substantially fully opened position of the opening / closing body.   3. The switchgear according to claim 1, wherein the drive source is operated by an input of a disaster prevention signal.   The switchgear according to any one of claims 1 to 3, further comprising a braking means for braking the movement of the switchgear.   The switchgear according to any one of claims 1 to 4, wherein the drive source is a direct current motor, and the urging force is generated by non-electric power.   6. The switchgear according to claim 5, wherein the braking means is a cogging torque of the DC motor.   6. The switchgear according to claim 5, wherein the braking means operates as a generator that consumes the kinetic energy of one of the opening / closing movements of the opening / closing body by generating electric power, and the DC motor. And an electric power consuming means for consuming the electric power generated by the brake circuit.   8. The switchgear according to claim 7, wherein the braking circuit includes an electromotive force measuring means for measuring an electromotive force generated by the DC motor, a control means for receiving a signal from the electromotive force measuring means, and a power consumption with each other. The control means selectively connects one of the plurality of power consumption means to the DC motor according to the plurality of power consumption means having different capabilities and the electromotive force measured by the electromotive force measurement means. And a selection switch means.   The opening / closing apparatus according to claim 7 or 8, further comprising obstacle sensing means for sensing an obstacle during the closing movement of the opening / closing body, wherein the obstacle sensing means senses the obstacle, An opening / closing device comprising a short-circuit means for short-circuiting the braking circuit.   The switchgear according to any one of claims 7 to 9, wherein the power consuming means is notifying means for notifying movement of the switchgear.   The opening / closing device according to any one of claims 1 to 10, wherein the opening / closing body is a shutter curtain in which a downward movement is a closed movement, and an upward movement is an open movement. The shutter curtain is opened / closed by forward / reverse rotation of a winding shaft for winding and unwinding the shutter curtain, and the driving source is connected to power transmission means for transmitting the driving force generated by the driving source. Is connected to the take-up shaft, and a return elastic force is accumulated by rotation of the take-up shaft when the shutter curtain is extended downward, and the accumulated return elastic force is applied to the shutter curtain in the upward direction. A return elastic member to be applied to the take-up shaft at the time of take-up, and from the fully open position or the substantially fully open position in the moving path of the shutter curtain In the range up to a position separated by a fixed distance, the torque around the take-up shaft due to the return elastic force of the return elastic member is reduced around the take-up shaft due to the downward closing movement force based on the weight of the shutter curtain. In the range from the position separated by the predetermined distance to the fully closed position or the substantially fully closed position, the torque around the winding shaft due to the downward closing movement force based on the weight of the shutter curtain is larger. The torque is larger than the torque around the take-up shaft due to the return elastic force of the return elastic member, and from the fully open position of the shutter curtain to the position separated by the predetermined distance or the position separated by approximately the predetermined distance. The closing movement is performed by the rotation of the winding shaft by the precursor driving force generated by the driving source, and the shutter curtain is separated by the predetermined distance. The closed movement to the fully closed position or a substantially fully closed position, opening and closing device, characterized in that takes place in the take-up shaft around torque by closing moving force in the downward direction based on the own weight of the shutter curtain from.   12. The switchgear according to claim 11, wherein the shutter curtain is a shutter curtain for disaster prevention for forming a disaster prevention zone by reaching a fully closed position or a substantially fully closed position.

Images