JPH11324539A - Fire shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire shutter capable of performing the safety operation such as stopping when it senses an obstacle during lowering operation and resuming lowering operation immediately when the obstacle is removed. SOLUTION: When a fire signal is received, lowering operation is started at S11, and if an obstacle sensing signal is not received while lowering operation is continued, the operation stops at a lower limit at S15 by looping S11, S12, and S15, thereby completing the flow and closing a shutter completely. When the obstacle sensing signal is received, the operation is shifted from S12 to S13 to stop the lowering operation and advances to S14 to wait until an obstacle is removed. When the obstacle is removed, an obstacle sensing part transmits a flickering signal, and a control part receiving the flickering signal returns to S11 from S14 to resume the lowering operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof shutter for closing a fire in a fire to prevent the spread of the fire.

[0002]

2. Description of the Related Art Fireproof shutters are provided to prevent fire from spreading in the event of a fire, and are installed, for example, at the boundary between a staircase area and a room area such as a store. About fire prevention shutter,
The Building Standards Law stipulates that the structure should automatically close when a fire occurs.

[0003] Driving of the fireproof shutter is divided into an electric shutter in which the raising and lowering operations of the shutter are performed by an electric motor, and a manual shutter having no electric motor for winding up. In the electric shutter, the motor is driven by a fire signal to lower the shutter to perform a closing operation. In the manual shutter, the braking mechanism is released by a fire signal and lowered by its own weight to perform a closing operation.
Further, even with an electric shutter, if a fire occurs and a power failure overlaps or a power failure occurs due to a fire, the motor cannot be driven to close the shutter. Therefore, even in the case of an electric shutter, as a method of automatically closing the shutter in response to a power failure, as in the case of a manual shutter, the braking mechanism can be released, and in the case of a power failure, a fire signal To release the braking mechanism and descend by its own weight. In the electric shutter and the manual shutter, a standby power source such as a battery is used as a power source of a driving mechanism for releasing a braking mechanism, thereby coping with a power failure.

In these shutter facilities, if there is an obstacle at the lower position of the shutter during the lowering operation, if the lowering is continued as it is, the obstacle will be pinched. Depending on the obstacle, the shutter may be damaged or an unexpected accident may occur if the obstacle is a refuge.

In order to prevent this, an obstacle sensing unit is provided in the shutter, and when the descending shutter touches an obstacle, the shutter is stopped from descending, or is inverted and raised for a predetermined time after the shutter is stopped. There is known a safety shutter for performing control.

[0006] The fireproof shutter that performs the closing operation in response to a signal from the fire alarm is not limited to the electric shutter and the manual shutter, but can be stopped or restarted when an obstacle is touched during the closing operation. It is important to have good safety mechanisms in place.

The obstacle sensing unit used in the safety mechanism employs a mechanism for sensing that the shutter seat plate has come into contact with an obstacle. A conventionally used mechanism uses a seat plate switch which is provided with a contact plate on a seat plate portion and which is activated by the contact plate being pushed up by contact with an obstacle. A wireless signal such as an infrared ray or a radio wave is transmitted by the operation of the seat plate switch to notify the shutter control unit that an obstacle has been detected, and control the descending operation.

FIG. 4 is a flowchart showing an example of the closing operation when the electric shutter equipped with the safety mechanism receives a fire signal. When the control unit of the shutter receives the fire signal, the descending operation is started in S21. S21,
If S22 and S27 are looped and the obstacle detection signal is not received while the descending operation is continued, S2 is performed.
At 7, the lower limit is stopped, and the flow ends. Of course, the shutter is completely closed.

When an obstacle sensing signal is received, the process proceeds from S22 to S23 to stop the descending operation, and then proceeds to S25 to reverse and ascend. After a predetermined period of time or a predetermined height reversal rise, in S26, the process is stopped for a certain period of time, and the process returns to S21 to resume the descending operation. Hereinafter, this operation is repeated. Therefore, in the course of the re-lowering operation, if an obstacle is detected, reversal and re-up and re-lowering are repeated, so that if the obstacle is removed, it can be completely closed.

As described above, by transmitting an obstacle sensing signal from the obstacle sensing unit to the control unit of the shutter, it is possible to prevent a danger that the evacuated person is stuck between the descending shutters and cannot move. Becomes

A battery is used as a power source of the obstacle sensing unit. When the detection of an obstacle is performed using the seat switch and the wireless signal is transmitted when the seat switch is turned on, the wireless signal is continuously transmitted while the seat switch is on. This causes a problem of battery consumption. In particular, when the seat panel switch is turned on and the wireless signal is continuously transmitted in a closed state where the shutter is grounded to the floor, the battery is consumed in a short time, which is not practical.

Therefore, in the obstacle sensing unit, the power is turned on and the radio signal is transmitted by turning on the seat plate switch, but the power is turned off after a predetermined time by the timer means. Therefore, even if the seat panel switch is kept on, the wireless signal is transmitted only for a short time, and battery consumption can be suppressed.

In a fire shutter equipped with an obstacle sensing unit and a safety mechanism incorporated therein, if the operation described with reference to FIG. 4 is performed, the seat plate switch is turned off by reversing and rising. Even if an obstacle is detected during the descent, a radio signal is transmitted and safe operation is possible even when the descent is completed.If the obstacle is removed and no obstacle is detected during the descent, the complete It is possible to have a closure. Therefore, even if the seat panel switch continues to be in the ON state, it is not necessary to continuously transmit the wireless signal, and it is only necessary to transmit the wireless signal for a short time.

However, in the case of an electric shutter incorporating a safety mechanism, when an obstacle is detected, the electric shutter shown in FIG.
In some cases, the number of repetitions of the series of operations of reversing ascending, stopping for a certain period of time, and descending again is limited to a predetermined number.

FIG. 5 is an example of a flow chart in which the number of repetitions of a series of operations of reversing ascending, stopping for a certain period of time and descending again is limited to a predetermined number. In the figure, the same steps as those in FIG. In this flowchart, the number of repetitions is counted, and when the descent is stopped in S23, if the predetermined number is reached, the flow is terminated from S24. In some cases, S24 and S25 are interchanged and reversed.

In the shutter that performs such an operation, if a fire signal is received and the removal of an obstacle is delayed, the shutter continues to stop at the position where the obstacle is detected, and then the obstacle is removed. However, the closing operation cannot be performed. In the flow in which S24 and S25 are reversed, the shutter continues to stop at the re-elevated position,
Even if the obstacle is subsequently removed, the closing operation cannot be performed.

In addition to the flowchart of FIG. 5, when a sensing signal is received from the obstacle sensing unit during the descending operation, the operation is immediately stopped when the obstacle is sensed, and the operation of maintaining the stopped state is performed. Even when the obstacle is removed, the closing operation cannot be performed even if the obstacle is removed.

In the flow described with reference to FIG. 4, even if the obstacle is removed at the time when the inversion rise is started, after the total time of the inversion rise time in S25 and the fixed time in S26 has elapsed. If not, the lowering is not performed, so that the time until the complete closing is delayed, which is not preferable in the case of the closing operation by the fire signal, regardless of the normal closing operation.

When the control unit of the manual shutter receives a fire signal, or when the control unit of the electric shutter receives a fire signal in the event of a power failure, power is supplied from the emergency power supply, as shown in FIG. Such an operation is performed. That is, the descending operation is started in S11, and S11, S12, S
If the obstacle detection signal is not received while the descending operation is continued while looping the loop 15, the lower limit is stopped in S15 and the flow is terminated. Of course, the shutter is completely closed. When an obstacle sensing signal is received,
The process moves from S12 to S13 to stop the descending operation and end the flow. Thus, in the flow of FIG.
If the descending operation is stopped in S13 after the detection signal of the obstacle is received in S12, since the ascent is not performed again, the closing operation cannot be performed even if the obstacle is subsequently removed.

As described above, in the conventional obstacle sensing unit, when an obstacle is sensed, only a radio signal is transmitted for a short period of time.
There is a problem that the closing operation cannot be performed or the closing operation is delayed.

[0021]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and when an obstacle is detected during a descending operation, the obstacle is removed by a fireproof shutter that performs a safety operation such as stopping. It is an object of the present invention to provide a fireproof shutter that can immediately resume the descending operation when it is performed.

[0022]

According to a first aspect of the present invention, there is provided a fire prevention shutter for receiving a fire signal and starting a closing operation, based on an obstacle sensing unit and an output of the obstacle sensing unit. In a fireproof shutter having control means for controlling the lowering operation of the shutter, the obstacle sensing unit includes:
A sensing signal indicating that an obstacle has been sensed and a disappearance signal indicating that the obstacle has been removed can be transmitted as radio signals to the control means.

According to a second aspect of the present invention, in the fireproof shutter according to the first aspect, the sensing signal and the extinction signal have the same signal content.

According to a third aspect of the present invention, the detection signal and the extinction signal of the fire prevention shutter according to the first aspect are identifiable signal contents.

According to a fourth aspect of the present invention, there is provided a fireproof shutter which starts a closing operation upon receiving a fire signal, wherein an obstacle detecting section and a lowering operation of the shutter are performed based on an output of the obstacle detecting section. In the fireproof shutter having control means for controlling, when the control means receives a detection signal indicating that an obstacle has been detected, the control means stops the descending operation and receives an extinguishing signal indicating that the obstacle has been removed. In this case, the shutter is controlled so as to restart the descending operation.

According to a fifth aspect of the present invention, there is provided a fireproof shutter for starting a closing operation upon receiving a fire signal, wherein an obstacle detecting unit and a lowering operation of the shutter are performed based on an output of the obstacle detecting unit. In the fireproof shutter having control means for controlling, the obstacle sensing unit has a seat plate switch that operates by sensing an obstacle, and based on switching of the seat plate switch from an off state to an on state, and A wireless signal is transmitted based on switching from the on state to the off state.

According to a sixth aspect of the present invention, in the fireproof shutter according to the fifth aspect, the signal content of the radio signal transmitted based on switching of the seat plate switch from the off state to the on state, and the on state The wireless signal transmitted based on the switching from the state to the off state has the same signal content.

According to a seventh aspect of the present invention, in the fireproof shutter according to the fifth aspect, the signal content of the radio signal transmitted based on switching of the seat plate switch from the off state to the on state, and the on state The signal content of the wireless signal transmitted based on the switching from the state to the off state is different.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a flowchart for explaining a first embodiment of a fireproof shutter according to the present invention. This flowchart is a flowchart when the control unit of the manual shutter receives a fire signal or when the control unit of the electric shutter receives a fire signal at the time of a power failure, as described in FIG. When a fire signal is received,
The descending operation is started in S11, and S11, S12, S15
If the obstacle detection signal is not received while the descending operation is continued, the lower limit is stopped in S15, the flow is terminated, and the shutter is completely closed.
When an obstacle detection signal is received, the process proceeds from S12 to S13 to stop the descending operation, and proceeds to S14 to wait for the removal of the obstacle. When the obstacle is removed, the obstacle sensing unit transmits an extinguishing signal, and the control unit, which has received the extinguishing signal,
The process returns from S14 to S11 to resume the lowering operation. Thereafter, if an obstacle detection signal is not received, S12 to S
After 15, the flow ends. If the obstacle detection signal is received during the re-fall, the process proceeds from S12 to S13 and S14 to wait for the reception of the obstacle disappearance signal.

The signal for eliminating the obstacle will be described. As described above, from the viewpoint of suppressing power battery consumption, the obstacle sensing unit operates for a short time to transmit the obstacle sensing signal, and transmits the obstacle sensing signal, from the viewpoint of suppressing power battery consumption. Turn off. Therefore, even if the obstacle detection state continues, the power is turned off, so that battery consumption can be prevented. When the obstacle detection signal disappears due to the removal of the obstacle from the obstacle detection state, similarly,
Turn on the power for a short time and send the extinction signal. As described above, when the control unit receives the disappearance signal, the re-lowering operation is performed.

A sensing signal transmitted when an obstacle is sensed and a disappearance signal transmitted when the obstacle is removed while the obstacle sensing state continues are transmitted when the power is turned on for a short time. It is not limited to doing.

For example, in an obstacle sensing unit in which an obstacle is sensed by a seat switch, the on / off state of the seat switch is monitored by detecting a voltage on the output circuit side of the seat switch. However, the change from the on state to the off state and the change from the off state to the on state may be detected while the power is always on. Since the current for detecting the voltage may be very small, it can be set to a state close to the spontaneous discharge of the battery. As described above, the current of the circuit for detecting the voltage is always made to flow, and the transmission of the radio signal is performed for a short time only when the on / off state changes. Transmission of radio signals
Although a large current is required, the battery is consumed for a short time. The detection of the voltage by turning on / off the seat plate switch may be performed intermittently at predetermined time intervals. In this case, if the ON / OFF state of the seat panel switch is determined based on a plurality of detection values, monitoring that is not affected by the chattering of the switch can be performed.

The signal content of the extinction signal is preferably different from the signal content of the sensing signal. For example, in the case where the sensing signal is transmitted as a digital signal, the signal code is different between the sensing signal and the extinction signal. In the control unit, it is easy to identify whether the signal is a sensing signal or an extinguishing signal, and control can be performed according to the signal content.

However, the signal content of the extinction signal may be the same as the signal content of the sensing signal. In the control unit, based on information such as the operating state of the shutter and the position of the shutter (which can be determined by a limit switch or the like), the received signal is a signal indicating that an obstacle has been detected, or the obstacle has disappeared. Thus, it is possible to identify whether or not the signal is a result of the control, and control the shutter.

FIG. 2 is a flowchart for explaining a second embodiment of the fireproof shutter according to the present invention. As described with reference to FIG. 5, in the flowchart, the number of times that a series of operations of reversing up, stopping for a certain time, and re-falling when an obstacle is detected in the electric shutter having the obstacle sensing unit is set to a predetermined number It is an example of the flowchart which was made to restrict. In the figure, the same steps as those in FIG. In this flowchart, the number of repetitions is counted, and when the descent is stopped in S23, if the number of repetitions is a predetermined number, the process proceeds from S24 to S28 and waits for reception of the disappearance signal. When the obstacle is removed, the obstacle sensing unit transmits the disappearance signal, and the control unit that has received the disappearance signal shifts from S28 to S29, resets a counter for counting the number of repetitions, and returns to S21. Restart the descending operation. Thereafter, if no obstacle detection signal is received, the flow ends through S22 to S27. If an obstacle sensing signal is received during the descent, the process proceeds to S23 and the above-described operation is repeated.

When a disappearance signal is received during the loop of S21 to S26 in which a series of operations of reversing ascending, stopping for a predetermined time, and re-falling are repeated, interrupt processing is immediately performed to execute S.
You may make it jump to 21. After the obstacle is removed, the closing operation can be performed in a short time.

FIG. 3 is a flow chart for explaining a third embodiment of the fireproof shutter according to the present invention. This flowchart is such that in the second embodiment described with reference to FIG. 2, a series of operations of reversing ascending, stopping for a certain period of time, and descending again when an obstacle is detected are not repeated. That is, when the sensing signal is received during the descending operation, the process proceeds from S22 to S23 to stop the descending operation,
At 25, it inverts and rises for a fixed time or a fixed height and stops, and waits for the reception of the disappearance signal at S28. When the obstacle is removed, the obstacle sensing unit transmits a disappearance signal, and the control unit that has received the disappearance signal returns from S28 to S21 and restarts the descending operation. Thereafter, if no obstacle detection signal is received, the flow ends through S22 to S27. If an obstacle sensing signal is received during the descent, the process proceeds to S23 and the above-described operation is repeated.

In this embodiment, when an obstacle is sensed, a series of operations of reversing up, stopping for a certain period of time, and re-lowering is not repeated. In such a system, the emergency power supply can be prevented from being consumed.

In the third embodiment, the reversal may not be performed. In that case, in FIG.
Although this corresponds to the flow from which S25 is deleted, the present invention is not limited to these embodiments. By receiving the extinction signal, even in the operation shown in the flowchart of FIG. 4, the closing operation can be immediately performed by the interruption processing to shorten the closing time.

The obstacle sensing unit is not limited to the one using the seat plate switch, but may be a pressure sensing means such as a resistance strain gauge or a semiconductor strain gauge, or an infrared sensing unit for detecting infrared rays from humans or animals. Appropriate detection means such as sensing means can be used.

[0041]

As is apparent from the above description, according to the present invention, in a shutter having an obstacle sensing unit,
After the obstacle is detected and the descending operation is stopped, if the obstacle is removed, the descending operation can be restarted and the shutter can be closed.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a first embodiment of a fireproof shutter according to the present invention.

FIG. 2 is a flowchart for explaining a second embodiment of the fireproof shutter of the present invention.

FIG. 3 is a flowchart for explaining a third embodiment of a fireproof shutter according to the present invention.

FIG. 4 is a flowchart illustrating an example of a closing operation when an electric shutter equipped with a safety mechanism receives a fire signal.

FIG. 5 is a flowchart showing another example of the closing operation when the electric shutter equipped with the safety mechanism receives a fire signal.

FIG. 6 is a flowchart showing another example of the closing operation when the electric shutter equipped with a safety mechanism receives a fire signal.

Claims (7)

[Claims] 1. A fire prevention shutter that receives a fire signal and starts a closing operation, comprising: an obstacle detection unit; and a control unit that controls a lowering operation of the shutter based on an output of the obstacle detection unit. In the shutter, the obstacle sensing unit can transmit a sensing signal indicating that an obstacle has been sensed and a disappearance signal indicating that the obstacle has been removed to the control unit as a wireless signal. And fireproof shutter. 2. The fireproof shutter according to claim 1, wherein the sensing signal and the extinction signal have the same signal content. 3. The fireproof shutter according to claim 1, wherein the sensing signal and the extinction signal have identifiable signal contents. 4. A fire protection shutter that receives a fire signal and starts a closing operation, comprising: an obstacle detection unit; and a control unit that controls a lowering operation of the shutter based on an output of the obstacle detection unit. In the shutter, the control unit stops the lowering operation when receiving a sensing signal indicating that an obstacle is detected, and restarts the lowering operation when receiving a disappearance signal indicating that the obstacle has been removed. Fireproof shutter characterized by controlling the shutter as follows. 5. A fire protection shutter that receives a fire signal and starts a closing operation, comprising: an obstacle detection unit; and a control unit that controls a lowering operation of the shutter based on an output of the obstacle detection unit. In the shutter, the obstacle sensing unit has a seat switch that is activated by sensing an obstacle, and switches from the on state to the off state based on switching of the seat switch from the off state to the on state. A fire shutter which transmits a radio signal based on the switching. 6. A signal content of a radio signal transmitted based on switching of the seat plate switch from an off state to an on state, and a signal content of a radio signal transmitted based on switching from an on state to an off state. 6. The fireproof shutter according to claim 5, wherein 7. A signal content of a radio signal transmitted based on switching of the seat plate switch from an off state to an on state, and a signal content of a radio signal transmitted based on switching from an on state to an off state. 6. The fireproof shutter according to claim 5, wherein