JP2008095314A - Brake control device of shutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake control device of a shutter, which can stop the shutter by rapidly returning a brake, even if the brake is desired to be rapidly returned during a brake release operation. <P>SOLUTION: This brake control device comprises: a feed lever 20 which is driven by a direct-current motor 14 so as to feed an operating lever 22 to a brake release position from a brake operating position; a spring 24 which urges the operating lever 22 to the brake operating position; and a movement regulating means 30 which is engaged with the operating lever 22 in the brake release position so as to regulate the movement of the operating lever 22, and which releases the regulation of the movement of the operating lever 22 when a stop signal is input. When the stop signal is input during the movement of the operating lever 22 to the brake release position from the braking operating position, the feed lever 22 is driven in a direction opposite to a feed direction by the direct-current motor 14. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shutter brake control device that performs a brake release operation to lower a shutter by its own weight based on a fire notification signal, and returns a shutter brake operation based on a stop signal.

  As this type of conventional brake control device, the one described in Patent Document 1 is known. In the apparatus described in Patent Document 1, as shown in FIG. 12, an electric motor 60 that rotates in one direction by the input of a brake release signal, a cam plate 62 that is fixed to the drive shaft of the electric motor 60, and a cam A pressing pin 62a protruding from the plate 62, a brake releasing lever 64 that can be moved in the brake releasing direction by the pressing pin 62a, and a spring 66 that urges the brake releasing lever 64 in the brake returning direction. The latch 68 that locks the brake release lever 64 at the brake release position of the brake release lever 64 to restrict the movement of the brake release lever 64 and the latch 68 in the release direction by the input of the brake return signal. An electromagnetic plunger that moves and moves the brake release lever 64 in the brake return direction by the biasing force of the spring 66 And a 0, a.

  A pressing pin 62 a protruding from the drive shaft of the cam plate 62 is disposed in a notch 64 a formed in the brake release lever 64. When a brake release signal is input from the illustrated brake operation state, the electric motor 60 rotates clockwise in FIG. 12A, the pressing pin 62a contacts the side of the notch 64a, and the brake release lever. 64 is pressed and moved to the brake release position. At this position, since the latch 68 is locked to the brake release lever 64, the brake release lever 64 can maintain the brake released state. As a result, the weight of the shutter is lowered.

  When the obstacle detection sensor detects that the shutter hits an obstacle or the like during the fall of its own weight, the electromagnetic plunger 70 moves the latch 68 in the unlocking direction, so that the brake release lever 64 moves in the brake return direction. It moves, the brake is restored, and the shutter stops.

JP 2002-89158 A

  However, in the configuration of Patent Document 1, even when it is necessary to return the brake during the brake release operation, that is, while the brake release lever 64 is moving in the brake release direction, the brake release lever 64 is once set. There is a problem that the brake cannot be reset unless the electromagnetic plunger 70 is operated and the latch 68 is released after the actuator is moved to the brake release position.

  Also, the cam 62 plate is about a half turn from when the brake release signal is input and the electric motor 60 starts to rotate until the pressing pin 62a of the cam plate 62 contacts the side of the notch 64a of the brake release lever 64. Therefore, there is a problem in that there is a time lag before the shutter starts to descend its own weight.

  In addition, there is a problem that a space for rotating the cam plate 62 is required, and the apparatus is increased in size.

  In addition, although a limit switch 72 that contacts the brake release lever is provided to detect the movement position of the brake release lever 64, the brake release operation is completed by directly detecting the movement of the brake release lever 64. When trying to detect this, there is a problem that the stability of the operation is poor.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a shutter that can quickly return to the brake and stop the shutter when the brake is to be returned during the brake release operation. A brake control device is provided.

  Another object of the present invention is to provide a shutter brake control device capable of quickly releasing a brake and starting a weight drop of the shutter when a brake release signal is input.

  Another object is to provide a brake control device for a shutter that can save space.

  Another object is to provide a shutter brake control device that can reliably and stably detect the completion of the brake release operation.

In order to achieve the above-described object, the invention according to claim 1 includes a drive source and an operating means that moves from the brake operating position to the brake releasing position, and the shutter is self-weighted based on the fire notification signal. A shutter brake control device for setting the operating means to a brake release position to lower the shutter and returning the operating means to the brake operating position based on a stop signal,
A feed means driven by a drive source to send the actuation means from the brake actuation position to the brake release position;
Biasing means for biasing the actuation means to the brake actuation position;
A movement restricting means for engaging the operating means at the release position of the brake to restrict its movement and releasing the restriction when a stop signal is input;
The feed means is driven in a direction opposite to the feed direction by a drive source when a stop signal is input while the actuating means is moving from the brake operating position to the brake releasing position. And

  According to a second aspect of the present invention, the feeding means according to the first aspect is movable in parallel with the moving direction of the actuating means, and the feeding means abuts against the actuating means from the brake operating position side of the actuating means. Thus, an extruding portion is provided which can push the operating means to the brake release position.

  A third aspect of the invention is characterized in that the pushing portion according to the second aspect abuts against the operating means when the operating means is in the operating position of the brake.

  The invention according to claim 4 is characterized in that the engagement position of the movement restricting means according to any one of claims 1 to 3 with the operating means can be adjusted along the moving direction of the operating means. And

  According to a fifth aspect of the present invention, the feed means according to any one of the first to fourth aspects is driven in a direction opposite to the feed direction when the actuating means moves to a brake release position. It is characterized by that.

  The invention according to claim 6 is the apparatus according to any one of claims 1 to 5, further comprising detection means for detecting that the operating means has moved to a brake release position, The detecting means directly detects the engaging operation of the movement restricting means.

  According to the present invention, when a stop signal is input while the operating means is moving from the brake operating position to the brake releasing position, the feeding means is driven in the direction opposite to the feeding direction. Even during the movement, the brake can be quickly returned to the brake operating position by the urging force of the urging means without being obstructed by the feeding means.

  According to the second aspect of the present invention, since the pushing portion of the feeding means driven by the drive source can directly press the operating lever, a high driving force can be obtained. Further, space can be saved by moving the feeding means in parallel with the operating means.

  According to the third aspect of the invention, when the fire alarm signal is generated, the driving force from the feed lever driven by the driving source is quickly transmitted to the operating lever, so that the operating lever can be quickly released from the brake release position. Can be moved to.

  According to the fourth aspect of the present invention, when the stroke between the brake operating position and the brake releasing position of the operating lever varies, the engagement position of the movement restricting means to the operating means is adjusted. This can be done.

  According to the fifth aspect of the present invention, when the actuating means moves to the brake release position, the feed means is driven in the direction opposite to the feed direction, so that the actuating means returns to the brake actuating position. You can be prepared for the case.

  According to the sixth aspect of the present invention, the detection means for detecting the movement to the brake release position directly detects the engagement operation of the movement restriction means, so that the movement of the actuation means is directly detected. Thus, reliable and stable detection can be performed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is an overall perspective view showing the internal structure of a brake control device for a shutter according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof.

  The brake control device 10 includes a housing 12, a DC motor 14 with a speed reducer that is a drive source fixed to the housing 12, a pinion 16 that is fixed to the output shaft of the DC motor 14, and a rack that meshes with the pinion 16. A feed lever 20 as a feed means having 18, an actuating lever 22 as an actuating means engaged with the feed lever 20, and a tension spring 24 as a biasing means for biasing the actuating lever 22 in one direction. ing.

  As the feeding means and the operating means, it is possible to adopt a configuration other than the feeding lever 20 and the operating lever 22, respectively, or a configuration including the feeding lever 20 or the operating lever 22 and including other elements.

  The one end 22a of the operating lever 22 is operatively connected to the brake device, but any structure can be applied to the connecting structure.

  The feed lever 20 is movable in the left-right direction in FIGS. 2 and 3 by a rack 18 that meshes with the pinion 16 rotated by the DC motor 14, and the initial position shown in FIGS. It can move between operating positions that have moved in the direction. In normal times, the feed lever 20 is in the initial position. As shown in FIG. 4, the feed lever 20 is provided with an extruding portion 20 a that protrudes toward the operating lever 22, and the extruding portion 20 a can be engaged with the operating lever 22.

  A plate 26 that can be engaged with the pushing portion 20 a is attached to the operating lever 22, and the pushing portion 20 a engages with the plate 26 when the feed lever 20 moves from the initial position to the working position. The actuating lever 22 moves in parallel with the feed lever 20. On the other hand, when the feed lever 20 returns from the operating position to the initial position, the pushing portion 20a does not engage with the plate 26, so that the feed lever 20 can move alone.

  The operating lever 22 is in a position in the left direction in the drawing as shown in FIG. 5A due to the urging force of the tension spring 24 in a normal state. This position is the operating position of the brake. At this time, the stopper 22b refracted at the one end 22a of the operating lever 22 is in a position where it abuts against the housing 12, and the pushing portion 20a and the hook plate 26 are in a position where they abut. The brake device that responds to the operation lever 22 is in a brake operation state, and the shutter is stopped. On the other hand, as shown in FIG. 5C, the brake is in the release position and responds to the operating lever 22 when the operating lever 22 is in the position moved rightward against the urging force of the tension spring 24. The brake device is in a brake release state.

  The brake control device 10 further includes movement restricting means 30 for maintaining the brake operating position of the operating lever 22.

  Although any configuration can be applied to the movement restricting means 30, in this embodiment, a stage 31 that is screwed to the bottom surface of the housing 12, a solenoid 32 that is fixed to the stage 31, and an L that is pivotally attached to the stage 31. A character-shaped regulation lever 34, and a spring 38 that has one end attached to the regulation lever 34 and the other end attached to the housing 12 or the stage 31 and biases the regulation lever 34 in a predetermined rotation direction.

  As shown in FIG. 2, a plurality of mounting holes 31 a and long holes 31 b through which screws for mounting to the housing 12 can be penetrated in the stage 31 along the moving direction of the operating lever 22. The position of one of the plurality of attachment holes 31a and the long hole 31b is selected, and the stage 31 is screwed to the housing 12. Thereby, the position of the movement restricting means 30 can be adjusted in the moving direction of the operating lever 22.

  A U-shaped member 32 b connected to the tip of the telescopic rod 32 a of the solenoid 32 is engaged with one end 34 a of the regulating lever 34. The other end 34b of the regulating lever 34 extends toward the operation lever 22, and a ball bearing 36 is pivotally attached to the tip thereof.

  As shown in FIG. 4, a hook plate 26 formed with a hook 26 a that protrudes toward the ball bearing 36 is attached to one of the operating levers 22. The hook 26 a can be engaged with the ball bearing 36. It has become. In addition, the hook plate 26 is formed with a stopper 26b with which the regulating lever 34 urged by the spring 38 abuts normally. As shown in FIG. 5B, when the actuating lever 22 moves to the brake release position, the regulating lever 34 is moved while moving the ball bearing 36 by swinging, so that the actuating lever 22 is completely braked. When the release position is reached, as shown in FIG. 5C, the regulating lever 34 swings to the original position by the spring 38, so that the ball bearing 36 is engaged with the hook 26a. Thus, the operation lever 22 is restricted from moving to the brake operation position.

  Further, the brake control device 10 detects the swing of the regulating lever 34 and detects that the operating lever 22 has moved to the brake release position, and the feed lever 20 is in the initial position. And a micro switch 42 for detecting the presence of the switch. Instead of directly detecting the displacement of the operating lever 22, the micro switch 40 further detects the displacement of the regulating lever 34 and detects that the ball bearing 36 is engaged with the operating lever 22. The movement to the brake release position is detected.

  FIG. 6 is a circuit diagram of the brake control device 10. The brake control device 10 includes a + side input end 52 that receives an input of a fire alarm signal (DC24V) from an interlock controller (not shown) and the like, and a − side input end 54. One terminal of the DC motor 14 is connected via the contact RY2, and the other terminal of the DC motor 14 is connected to the negative input end 54 via the relay contact RY1 and the relay contact RY3. Further, the micro switch 42, the relay RY2, and the transistor TR1 are connected in series with the relay contact RY1 and the relay contact RY3.

  Further, an obstacle detection circuit 56 that sends a stop signal when detecting that an obstacle has come into contact with the lower end of the shutter is connected between the + side input terminal 52 and the − side input terminal 54. When a stop signal is output from the obstacle detection circuit 56, the transistor TR2 is turned on, and a current flows through the relay RY1.

  Further, the micro switch 40 and the solenoid 32 are connected in series between the + side input end 52 and the relay contact RY 1, and between the connection point of the micro switch 40 and the solenoid 32 and the − side input end 54. Is connected to the relay RY3. Further, another relay contact RY1 is connected between the + side input end 52 and the relay RY3.

The operation of the brake control device 10 configured as described above will be described.
In a normal state, it is in the state shown in FIG. 5A, and the operating lever 22 of the brake control device 10 is in the brake operating position. Therefore, the shutter is in a stopped state due to the operation of the brake.

  When a fire occurs and a fire notification signal is generated from the interlock controller or the like, a fire notification signal (DC 24 V) is applied between the + side input end 52 and the − side input end 54. Then, a current flows through the DC motor 14 as shown in FIG. 6, whereby the pinion 16 rotates, and the rack 18 and the feed lever 20 integrated therewith move from the initial position to the operating position. Thus, the operation lever 22 is moved together to the brake release position, so that the brake release operation is performed (FIG. 5B).

  Then, when the operating lever 22 reaches the brake release position completely, the hook 26a engages with the ball bearing 36, and the backward movement of the operating lever 22 to the brake operating position is restricted (FIG. 5C). )), As shown in FIG. 7, the microswitch 40 is closed. As a result, a current flows through the relay RY3, the relay RY3 is excited, and the relay contact RY3 is switched, so that both terminals of the DC motor 14 are short-circuited and braked to stop.

  Here, since a current flows through the microswitch 42, the transistor TR1 is turned ON after the charging time of the capacitor connected to the base side has elapsed, and a current flows through the relay RY2, and the relay RY2 is excited, as shown in FIG. Then, the relay contact RY2 is switched. For this reason, a current in the opposite direction flows through the DC motor 14, and the DC motor 14 rotates in the reverse direction, so that the feed lever 20 returns from the operating position to the initial position (FIG. 5D). At this time, since the backward movement of the operation lever 22 is restricted by the movement restricting means 30, only the feed lever 20 returns to the initial position.

  When the feed lever 20 returns, the micro switch 42 is opened, so that the relay contact RY2 switches to the original contact position, and as shown in FIG. 9, both terminals of the DC motor 14 are short-circuited and braked to stop.

  The operating lever 22 maintains the brake release position by the movement restricting means 30. Therefore, even if the fire notification signal is cut off, the brake release is maintained, so that the shutter lowering does not stop halfway, and the fire prevention section can be surely formed.

  On the other hand, when an obstacle is detected while the shutter is moving down, a current flows through the relay RY1 by a stop signal from the obstacle detection circuit 56, and the relay RY1 is excited, and as shown in FIG. 10, two relay contacts RY1. Switches. As a result, the solenoid 32 is excited, the telescopic rod 32a expands and contracts, and the regulating lever 34 is swung, so that the engagement between the ball bearing 36 and the hook 26a is released, and the operating lever 22 is It reverses by the urging force and returns to the original brake operating position (FIG. 5 (e)). Thus, the brake device is deactivated, and the brake device returns to the brake operation state, so that the shutter stops. At this time, the DC motor 14 is maintained in a stopped state. Thereafter, the brake release operation shown in FIG. 6 can be performed again.

  By the way, when an obstacle is detected during the brake release operation, as shown in FIG. 11 from the state of FIG. 6, the two relay contacts RY1 are switched, a current flows through the relay RY3, the relay RY3 is excited, The relay contact RY3 is switched. Then, after the DC motor 14 is stopped, the relay contact RY2 is switched. For this reason, the DC motor 14 rotates in the reverse direction, and the feed lever 20 returns from the operating position to the initial position. Therefore, the operating lever 22 can perform an instantaneous return operation without being obstructed by the feed lever 20. Regardless of being engaged or not engaged by the movement restricting means 30, the actuating lever 22 can be returned.

As described above, according to the present embodiment, the following effects can be obtained.
Even when an obstacle is detected while moving to the brake release position, the feed lever 20 moves in the opposite direction, so that even if the feed lever is in the middle of its feed, the operating lever 22 can be quickly pulled by the tension spring. The urging force of 24 can return the brake to the operating position.
Since the movement of the feed lever 20 due to the rotation of the DC motor 14 is quickly transmitted from the pushing portion 20a of the feed lever 20 to the operation lever 22 due to the generation of the fire notification signal, the operation lever 22 quickly moves to the brake release position. And can move. Further, when the feed lever 20 feeds the operating lever 22 to the brake release position, the direct-current motor reversely rotates and the feed lever 20 returns to the initial position and is on standby. Even after returning to the normal state, it is possible to quickly shift to the brake release operation.
The rotational force from the DC motor is transmitted as a linear force to the feed lever 20 via the pinion 16 and the rack 18, and the pushing portion 20a of the feed lever 20 directly presses the operating lever 22, so that the drive is high. You can gain power. Further, since the feed lever 20 only performs a linear motion parallel to the moving direction of the operation lever 22, space saving can be achieved.
Since the micro switch 40 directly detects that the operating lever 22 is engaged by the movement restricting means 30, the operation can be stabilized. If the movement of the operation lever 22 is directly detected, it is difficult to determine whether or not the movement is restricted by the movement restricting means 30, so that the operation is not stable, but the engagement operation of the movement restricting means 30 is directly detected. Thus, reliable and stable detection can be performed.
Since the mounting position of the movement restricting means 30 with respect to the housing 12 can be adjusted and the engagement position of the movement restricting means 30 can be adjusted, when the stroke of the operating lever 22 is various, It can be easily handled by adjusting the mounting position.

It is a perspective view showing the internal structure of the brake control apparatus of the shutter which concerns on embodiment of this invention. It is a top view of the brake control apparatus of the shutter which concerns on embodiment of this invention. It is a front view of the brake control apparatus of the shutter which concerns on embodiment of this invention. It is a disassembled perspective view around a feed lever and an operation lever. It is a figure showing a series of operation | movement of a feed lever, an operation lever, and a movement control means. It is a circuit diagram of the brake control device of the shutter concerning the embodiment of the present invention, and represents the time of brake release operation. It is a circuit diagram of the brake control device of the shutter concerning the embodiment of the present invention, and represents the state which moved to the release position of a brake. It is a circuit diagram of the brake control apparatus of the shutter which concerns on embodiment of this invention, and represents the state following FIG. It is a circuit diagram of the brake control apparatus of the shutter which concerns on embodiment of this invention, and represents the state following FIG. It is a circuit diagram of a brake control device of a shutter concerning an embodiment of the present invention, and represents the state where a stop signal was inputted. It is a circuit diagram of the brake control device of the shutter concerning the embodiment of the present invention, and represents the state where the stop signal was inputted during brake release operation. It is the front view and top view which show the brake control apparatus of the conventional shutter.

Explanation of symbols

10 Brake control device 14 DC motor (drive source)
20 Feed lever (feed means)
20a Extruding part 22 Actuating lever (actuating means)
24 Tension spring (biasing means)
30 Movement restriction means 40 Micro switch (detection means)

Claims (6)

A driving source and an operating means that moves from the brake operating position to the brake releasing position, and the operating means is set to the brake releasing position to lower the weight of the shutter based on the fire notification signal, and based on the stop signal. A brake control device for a shutter that returns the operating means to the operating position of the brake,
Feed means driven by a drive source to send the actuation means from the brake actuation position to the brake release position;
Biasing means for biasing the actuation means to the brake actuation position;
A movement restricting means for engaging the operating means at the release position of the brake to restrict its movement and releasing the restriction when a stop signal is input;
The feed means is driven in a direction opposite to the feed direction by a drive source when a stop signal is input while the actuating means is moving from the brake operating position to the brake releasing position. Brake control device.   The feeding means is movable in parallel with the moving direction of the actuating means, and the feeding means can contact the actuating means from the brake actuating position side of the actuating means and push the actuating means to the brake release position. The brake control device according to claim 1, further comprising an extrusion portion.   The brake control device according to claim 2, wherein the pushing portion abuts against the operating means when the operating means is at an operating position of the brake.   4. The brake control device according to claim 1, wherein an engagement position of the movement restricting unit with the actuating unit is adjustable along a moving direction of the actuating unit. 5.   5. The brake control device according to claim 1, wherein the feeding unit is driven in a direction opposite to the feeding direction when the operating unit moves to a brake release position. 6. . 2. The apparatus according to claim 1, further comprising detecting means for detecting that the operating means has moved to a brake release position, wherein the detecting means directly detects an engagement operation of the movement restricting means. The brake control device according to any one of 5 to 5.

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