JPH0320478Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric shutter installed at an opening in a building, etc., and in particular to an automatic locking system for an electric shutter that automatically locks a rolled-up shutter curtain from accidentally falling. It is related to the device.

Generally, this type of electric shutter has a lock pin that is recessed into the guide rail to prevent the shutter curtain from suddenly falling under its own weight due to some reason such as a break in the transmission chain, causing an unexpected accident. A device equipped with a locking device for locking the tar curtain from falling is known, and a conventional locking device such as that disclosed in Japanese Utility Model Publication No. 56-43517 is known. However, since these lock devices use a solenoid mechanism to move the lock pin in and out, they have the disadvantage that an unpleasant sound is generated by the solenoid mechanism each time the lock pin is moved in and out. Moreover, when the shutter curtain is lowered, the solenoid mechanism is activated to move the lock pin to the lock position, and when the shutter curtain reaches the upper limit position, the solenoid mechanism is deactivated and the return bullet is activated. Since the shutter curtain was designed to automatically return to the released position by the action of
If a power outage occurs while the shutter curtain is on the guide rail, the solenoid mechanism becomes inactive and the lock pin is forcibly moved to the lock position, causing problems such as damage to the shutter curtain and lock pin. I was getting used to it.

The present invention was devised in order to eliminate these drawbacks in view of the above-mentioned actual situation, and although it is possible to reliably prevent the shutter curtain from falling unexpectedly by using a lock pin, it is possible to prevent the lock pin from moving in and out. Instead of using a solenoid mechanism that produces unpleasant operating noises, a geared motor that does not produce any operating noise is used to perform this operation, making it possible to automatically lock the shutter curtains silently and without making any noise, and also to prevent power outages. The object of the present invention is to provide an automatic locking device for an electric shutter that can maintain the locking pin in the locked position or the released position without any movement even if the locking pin is moved. A lock pin is interlocked and connected to a geared motor that drives in forward and reverse directions in response to a command from the shutter curtain, and the lock pin is configured to move between a lock position for locking the lowering of the shutter curtain and a release position for releasing the lock. The curtain lift control circuit and the lock control circuit are connected to a relay switch that detects that the shutter curtain has reached its upper limit and issues a command to the geared motor to move the lock pin to the lock position, and a geared motor when the lowering push button switch is turned on. A relay switch that issues a command to move the lock pin to the release position, and a push button switch for lowering.
It is characterized in that it is connected via a relay switch that detects when the lock pin reaches the release position upon activation and issues a command to lower the shutter curtain.

Next, the present invention will be explained in more detail based on an embodiment shown in the drawings. In the drawings, reference numeral 1 denotes an electric shutter, and a shutter curtain 2 constituting the electric shutter 1 has its left and right edges vertically supported on left and right guide rails 3 installed in an opening of a building, etc. ing. The shutter curtain 2 is wound up or rewound onto a winding drum (not shown) by forward and reverse driving of an opening/closing machine M installed in a drive device 4 in accordance with a command from a lift control circuit A to be described later. The opening can be opened and closed by moving up and down from the shutter case 5. 3a is a guide groove of the guide rail 3.

6 is a case in which members such as a geared motor m equipped with a speed reducer are housed, and the case 6 is placed at an appropriate height on the indoor side of the guide rail 3, for example, approximately 50 cm below the lintel position so that it does not get in the way. It is buried in the wall etc. On the other hand, a drive pulley 7 having a spiral groove is fixed to the drive shaft 7a of the geared motor m. The endless actuation wire 8 is wound around the drive pulley 7 multiple times in a spiral groove to prevent slippage, and the driven pulleys 9 and 9a disposed on both sides of the drive pulley 7 are further suspended. 10,1
Reference numeral 0a denotes a pair of guide rods arranged parallel to each other in the case 6, and a slider 11 is slidably inserted through the guide rods 10, 10a. This slider 11 is integrally fixed to the actuating wire 8 at a suitable position. Note that 8a is a bullet that always maintains the actuating wire 8 in a tensioned state. A proximal end of a lock pin 12 is removably screwed into an arcuate groove 11a formed on the upper surface of the slider 11 via a knob 13. Then, by driving the geared motor m in forward and reverse directions in response to commands from a lock control circuit B, which will be described later, the lock pin 12 sinks into the guide rail 3 and reaches the guide groove 3a, thereby locking the shutter curtain 2 from lowering. position, and a release position where the lock is released by pulling it out from the guide rail 3.

Reference numerals 14 and 15 designate microswitches that constitute part of the lock control circuit B. One of the microswitches 14 is brought into contact with the slider 11 when the lock pin 12 reaches the release position due to the drive of the geared motor m. The other micro switch 15 is arranged in the case 5 so that when the lock pin 12 reaches the lock position, the slider 11 comes into contact with it and the switch contact MS2 turns OFF. There is.

Next, the lock control circuit B of the geared motor m and the lifting operation circuit A of the shutter curtain 2 are explained.
will be explained using wiring diagrams shown in FIGS. 5 to 9. First, on the lift control circuit A side,
PBU is a raising push button switch that is pressed to raise the shutter curtain 2, PBD is a lowering push button switch that is pressed to lower it, and PBS is a stop button that is pressed to stop the shutter curtain 2 that is moving up and down. The push button switch RYU is a lift relay switch RYD, which switches the two sets of switch contacts by pressing the lift push button PBU, causing a positive current to flow through the switch M to raise the shutter curtain 2. After pressing the lowering push button switch PBD, the two sets of switch contacts are switched in response to a command from the lock control circuit B, which will be described later, and the opposite current is applied to the switch M to lower the shutter curtain. LSU1 is an upper limit switch that turns OFF when it detects that shutter curtain 2 has reached its upper limit, and LSD1 and 2 turn OFF when they detect that shutter curtain 2 has reached its lower limit.
When the lower limit switch RY4 is pressed, the lower limit switch PBD is lowered by the lower limit switch PBD.
The two switch contacts on the side are ON, and the switch contact on the lock control circuit B side is a relay switch that switches OFF. On the other hand, on the lock control circuit B side, LSU2 detects that the shutter curtain 2 has reached the upper limit position and turns ON.
RY1 is a relay switch whose switch contact switches the current to geared motor m between forward and reverse, RY2 and 3 are micro switches 1
4 (switch contact MS1) ON-OFF switching,
The switch contact on the lift control circuit A side is a relay switch that switches between ON and OFF, and the switch contact on the lock control circuit B side is a relay switch that switches between OFF and ON.
In addition, AVR is a current stabilization circuit, F is a fuse, SS
is a rectifier, BR is a shutter brake, T1 is a timer that operates after a predetermined timer period (for example, 5 seconds) that is longer than the movement time of the lock pin 12 by the geared motor m, and RT1 is the above-mentioned timer T.
1, lift control circuit A and lock control circuit B
This is a relay timer switch that switches the switch contacts OFF to OFF.

In such a wiring diagram, in order to raise the shutter curtain 2, there is a lift push button switch.
When PBU is pressed to turn ON, the lift drive relay switch RYU is switched and the circuit is self-held, and current flows to the opening/closing machine M to drive it, winding up the shutter curtain 2 and opening the opening. (Figure 5). When the shutter curtain 2 reaches the upper limit position, the upper limit switch LSU1 on the lift control circuit A side is turned off, the lift drive switch RYU is switched to its original state, and the opening/closing machine M is stopped. On the other hand, on the lock control circuit B side, the switch contact MS2 of the micro switch 15
remains ON, and the upper limit switch LSU2 turns ON and the relay switch RY1 switches, so current flows to the geared motor m and drives it, and the lock pin 12 moves from the release position to the lock position. (Figure 6). When the lock pin 12 reaches the lock position, the slider 11 contacts the micro switch 15 and the switch contact MS2 turns OFF, thereby stopping the geared motor m (FIG. 7). At this time, the switch contact MS1 of the micro switch 14 is turned OFF because the slider 11 has moved, and therefore the relay switches RY2 and RY3 are switched so that the switch contacts wired to the elevation control circuit A side are respectively turned OFF. Next, press the lowering push button switch to lower the shutter curtain 2.
When PBD is pressed to turn on, the relay switch RY is activated on the lift control circuit A side as described above.
2. Since the RY3 contact is OFF, the descending drive relay switch RYD will not switch immediately and the switch M will be driven, but the relay switch
RY4 switches so that the contact on the lock control circuit B side turns OFF, and this causes the relay switch to turn OFF.
RY1 is also switched, and a current flows in the geared motor m in the opposite direction to that described above, driving the lock pin 12 in the opposite direction, and the lock pin 12 moves from the lock position to the release position (8th
figure). When the lock pin 12 reaches the release position, the slider 11 contacts the micro switch 17 and the switch contact MS1 is turned on. Therefore, relay switches RY2 and RY3 are connected to the lift control circuit A.
Switch so that the contact provided on the side is turned on,
As a result, the lowering drive relay switch RYD is switched, and the opening/closing machine M is driven to rewind the shutter curtain 2 and close the opening (FIG. 9). When the shutter curtain 2 is lowered to the lowest level, the lower limit switches LSD1 and LSD2 are turned off and the opening/closing machine M is stopped.

In the present invention as in the embodiment described above, when the shutter curtain 2 is wound up and reaches the upper limit position and the opening/closing machine M automatically stops, the geared motor m is driven by a command from the lock control circuit B as described above. As a result, the lock pin 12 moves to the lock position, thereby causing the lock pin 12 to lock the shutter curtain 2.
This means that the downward movement is locked. On the other hand, if you press the lower push button switch PBD to close the opening,
First, geared motor m is reversely driven by a drive command opposite to the above from the lock control circuit B side, and lock pin 1 is
After the shutter curtain 2 moves from the lock position to the release position, the opening/closing machine M is reversely driven by a command from the elevator control circuit A, and the shutter curtain 2 is lowered to close the opening.

In this way, in the present invention, when the shutter curtain 2 is located at the upper limit position, even if an inconvenience occurs such as the chain of the drive mechanism 4 being unexpectedly cut, the shutter curtain 2 will be able to move to the upper limit position. When the shutter curtain 2 reaches the upper limit position, the lock pin 12 always moves to the lock position in response to a command from the lock control circuit B, which reliably prevents the curtain from falling unexpectedly, resulting in extremely high safety. It turns out. Moreover, although the movement of the lock pin 12 between the lock position and the release position to prevent the shutter curtain 2 from falling unexpectedly is completely automated, it uses a solenoid system that generates unpleasant noises, as in the past. Since this can be carried out using a geared motor m instead of a geared motor m, the movement of the lock pin 12 into and out is quiet and does not generate any unpleasant noise.

Furthermore, when a conventional solenoid mechanism is used, the lock pin is moved to the release position by actuation of the solenoid mechanism, and the lock pin is moved to the lock position by a return bullet, for example, when the shutter If a power outage occurs while the shutter curtain 2 is on the guide rail 3, such as when the curtain 2 is lowered or the opening is closed, the solenoid mechanism becomes inactive even though the shutter curtain is on the guide rail 3. There is no possibility that the lock pin or the shutter curtain 2 will be damaged by being forcibly moved to the lock position by the return bullet. That is, in the present invention, the lock pin 12 is moved between the lock position and the release position by the forward and reverse drive of the geared motor m, so that the lock pin 12 is moved between the lock position and the release position when the lock pin 12 is in the lock position or the release position. Even in the event of a power outage, the lock pin 12 will not move from these positions at all and will continue to be maintained at the above positions. Therefore, even during a power outage, a complete locking action by the lock pin 12 can be obtained, and the shaft The starter curtain 2 and lock pin 12 will not be damaged. Furthermore, in the event of a power outage, if necessary, loosen the knob 13, remove the lock pin 12 from the slider 11, and then move only the lock pin 12 manually to move it to the lock or release position very easily. It is very convenient.

In addition, in this embodiment, even though the geared motor drive command is issued from the lock control mechanism B due to some reason such as the lock pin 12 being rusted or bent or an electrical defect in the drive device, If an abnormality occurs in which the lock pin does not move, when the timer time set by timer T1 has elapsed, relay timer switch RT1 switches and the contact turns OFF, thereby opening and stopping the circuit to geared motor m and switchgear M. do. Therefore, in this state, there is no seizure of the geared motor m, and no matter which push button switch is pressed, it no longer operates at all, so that the shutter curtain 2 will not move up or down erroneously.
Also, connect relay timer switch RT1 to a warning light, alarm buzzer, etc., and lock pin 12.
If the shutter curtain 2 does not move or other malfunctions can be notified, it would not only be possible to know whether there is an abnormality every time the shutter curtain 2 is moved up or down, but also to quickly discover the malfunction. As a result, repairs and inspections can be carried out quickly, and the electric shutter 1 can always be maintained in a perfect condition without any failures.

In addition, in the case of this invention, the shutter curtain 2
The lock pin 12 is controlled so that it will never move downward until the guide rail 3 is unlocked, and the lock pin 12 may protrude before the shutter curtain 2 reaches the upper limit position. Therefore, the shutter curtain 2 and lock pin 12 can be operated in an ideal manner.

In summary, the present invention interlocks and connects a lock pin to a geared motor that drives forward and reverse in response to commands from a lock control circuit, and moves the lock pin between a lock position where it locks the lowering of the shutter curtain and a release position where it releases the lock. The shutter curtain lift control circuit and the lock control circuit are connected to a relay switch which detects that the shutter curtain has reached its upper limit and issues a command to the geared motor to move the lock pin to the lock position. , a relay switch that commands the geared motor to move the lock pin to the release position when the lowering push button switch is turned ON, and the lowering push button switch mentioned above.
The lock pin that locks the shutter curtain from falling unexpectedly is connected via a relay switch that detects that the lock pin has reached the release position when the shutter is turned on and issues a command to lower the shutter curtain. Since the lock position and the release position are moved by the forward and reverse drive of a geared motor rather than the conventional solenoid mechanism, quiet operation can be performed without generating any unpleasant noise. Furthermore, even in the event of a power outage, the locking pin remains in the locked or released position without being moved by the return bullet, so the locking pin remains in the locked or released position, unlike when a solenoid mechanism is used. This completely prevents the shutter curtain from colliding with the shutter curtain and damaging it, and provides an ideal automatic locking function for the shutter curtain.

[Brief explanation of drawings]

The drawings show an embodiment of the automatic locking device for an electric shutter according to the present invention, in which Fig. 1 is an overall front view of the electric shutter, Fig. 2 is a side view of the same, and Fig. 3 is a main part of the same. Cross-sectional view of Figure 4A,
B is a plan sectional view and a side sectional view of the automatic locking device, respectively, and FIGS. 5 to 9 are circuit diagrams showing the functions of the lock control circuit and the lift control circuit. In the figure, 1 is an electric shutter, 2 is a shutter curtain, 3 is a guide rail, 4 is a drive mechanism, 5 is a shutter case, 6 is a case, 7 is a drive pulley,
8 is an actuation wire, 9, 9a is a driven pulley, 10,
10a is a guide rod, 11 is a slider, 12 is a lock pin, 13 is a knob, 14 and 15 are micro switches, A is a lift control circuit, B is a lock control circuit, M is a switch, m is a geared motor, MS1, 2
is a micro switch contact, PBU is a push button switch for raising, PBD is a push button switch for lowering, PBS is a push button switch for stopping, RYU, RYD are relay switches, LSU1, 2, LSD1, 2 are limit switches, RY1 to 4 are relay switches. , T1 is a timer, and RT1 is a relay timer switch.

Claims (1)

[Scope of utility model registration request] A lock pin is interlocked and connected to a geared motor that drives forward and reverse in response to commands from a lock control circuit, and the lock pin is configured to move between a lock position where the shutter curtain is locked from lowering and a release position where the lock is released. , the elevator control circuit and the lock control circuit for the shutter curtain are connected to a relay switch that detects that the shutter curtain has reached its upper limit and instructs the geared motor to move the lock pin to the lock position, and a lowering push button switch. A relay switch that, when turned ON, commands the geared motor to move the lock pin to the release position, and when the lowering push button switch is turned ON, it detects that the lock pin has reached the release position and issues a command to lower the shutter curtain. An automatic locking device for an electric shutter, characterized in that the locking device is connected via a relay switch.