JPS5947796B2 - Shutter emergency release device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an emergency opening device for an electric shutter.

Generally, shutters are used on buildings to prevent fire or theft.
They are installed at the entrances and exits of buildings such as stores and warehouses, and are usually closed on holidays and at night.

In the event of an emergency such as a fire,
It is necessary to open the shutters urgently for fire extinguishing operations, lifesaving operations, and removal of household goods.

However, currently, the shutter opening/closing switch is located inside the building, and in rare cases, an electric shutter opening/closing switch box or a manual opening/closing operation box is also installed outside the building. The shutters are usually locked on holidays and at night, and in the event of an emergency, it is often impossible to open the shutters due to a power outage, creating a bottleneck for firefighting and rescue operations.

Various proposals have been made to solve these problems, but all of them have problems in that they are complex in structure, time-consuming to operate, and expensive.

The purpose of this invention is to solve the problems of conventional shutter opening/closing devices as described above. To provide an emergency shutter opening device that can quickly open a shutter from the outside of a building.

The details of the present invention will be explained below based on the accompanying drawings illustrating embodiments.

Figure 1 shows the shutter winding mechanism. In this figure, 1 is the shutter winding cylinder rotatably attached to a bracket 2 fixed to a building, 3 is a machine box fixed to the bracket 2, and A gear reducer 4 is provided in the machine box 3, and its output shaft 5 and the shaft of the winding drum 1 are interlocked by a transmission chain 6.

7 is an AC motor fixed to the side of the machine box 3, usually 20
A 0V three-phase AC motor or a 100V single-phase AC motor is used, and the shaft of this motor 7 is connected to the input shaft 8 of the speed reducer.

9 is a brake brake installed on the shaft of the electric motor 7, and this brake 9
The operating mechanism will be described later.

10 is a machine box provided adjacent to the electric motor 7, and an emergency DC motor 11 is provided on the side of this machine box 10.

This electric motor 11 is rotated by a battery power source of an automobile or the like, and is for DC 12V or 24V.

Reference numeral 12 denotes a clutch that connects or separates the rotating shaft of the electric motor 7 and the rotating shaft of the electric motor 11. In the illustrated example, a gear attached to the shaft of the electric motor 11 so as to be able to move forward and backward is moved forward and backward by a lever 14 that is swung by an electromagnet 13, and the electric motor is moved back and forth. Although the clutch is designed to engage and disengage from a gear fixed to the shaft of No. 7, other types of clutches may be used.

Next, considering the operating mechanism of the brake 9, as shown in FIGS.
is pulled by a spring 18 to apply a rotational force to the lever 15 in the direction of loosening the brake 9, and the electromagnet 16 is applied to the lever 15 when energized.
When the brake lever 5 is simultaneously moved in the brake release direction and demagnetized, the brake 9 is brought into a braking state by a braking spring.

Therefore, since the spring 18 is stronger than the braking spring provided on the brake 9, a locking hook 20 is provided to lock the hook 19 provided on the spring 18 so that the spring 18 does not operate during normal operation. An electromagnet 21 is provided to remove the hook 20 from the hook 19.

This electromagnet 21 releases the locking hook 20 from the hook 19 when excited, and the coil of this electromagnet 21 is connected to the emergency standby power supply circuit A.

This circuit consists of a DC 12V or 24V output circuit consisting of a transformer 22 and a rectifier 23 whose primary circuit is a commercial power source such as AC 100■, and a battery 2 of the same voltage for power outages.
4, and one side of the output circuit is connected in series with an abnormality detector 25 that closes the circuit when an abnormality is detected, such as a heat or smoke detector, and a limit switch 26 that opens the circuit when the shutter winding ends. do.

Further, the coil of a relay L is connected in parallel with the coil of the electromagnet 21, and the a contact La of this relay L is connected in parallel with the abnormality sensor 25 to form a self-holding circuit.

An extension cord 29 stored in a cord box 28 or the like installed at an appropriate location outside the building is connected to the emergency release circuit 27, which serves as the power supply circuit for the electric motor 11, via an emergency switch 30 such as a knife switch. A clip terminal 31 for detachably connecting to a terminal such as a car battery is attached to the tip of the cord 29, and the other chive a contact La of the relay L is connected to the middle of the circuit 27.

Note that the coin of the electromagnet 13 is also connected to the circuit 27.

In the above embodiment, when the shutter open/close switch (not shown) is operated, current from the commercial power supply is passed to the electric motor 7, and at the same time, the electromagnet 16 is also excited and the brake 9 is loosened. The winding drum 1 including the chino 6 rotates to open and close a shutter (not shown).

However, if a fire occurs and the power goes out, or if the normal shutter open/close switch cannot be operated, the shutter cannot be opened.

If you are currently sitting in a closed state and an emergency situation such as a fire occurs, the abnormality sensor 25 will detect heat or smoke and close the circuit.

Therefore, the current from the emergency standby power supply circuit A is transferred to the electromagnet 21.
The current flows through the coil to excite the coil, the locking hook 20 is removed from the hook 19, the wire 17 is pulled by the spring 18, the operating lever 15 is turned, and the brake 9 is released.

On the other hand, each a contact La is closed by the excitation of the relay L.

In this state, when the extension cord 29 is pulled out from the cord box 28, the clip end 7-31 is connected to the terminal of the battery of a car, etc., and the emergency switch 30 is turned on, the electromagnet 13 shown in FIG. When the two are connected, the electric motor 11 is started, and the human power shaft 8 of the reducer 4 is driven via the rotor of the electric motor 7, and the shutter is wound.

In this way, the shutter is completely wound up.The shutter I/Switch 26 opens, the self-holding circuit of the relay L is opened, the relay L returns to its normal state, its a contact La opens, the electric motor 11 stops, and the shutter is in the open position. .

Thereafter, the hook 19 is manually engaged with the locking hook 20 to return to the normal state.

In the embodiment shown in FIG. 3, the power supply circuit 27 of the electric motor 11 is shared with the emergency backup power supply circuit A, and the structure of the parts not shown is the same as in the embodiments shown in FIGS. 1 and 2.

In this example, the abnormality detector 25 is activated due to the occurrence of an abnormality such as a fire.
After the shutter is closed, the shutter is opened simply by turning on the emergency switch 30.

In this case, if a cord 29 having a lip terminal 31 as shown in FIG. 2 can be connected to the power supply circuit 27, the shutter can be opened even if the emergency backup power supply circuit A is out of order.

This invention is to install an emergency switch such as a knife switch and an extension cord in a place outside the building that can be operated by firefighters, etc., as shown in "-". An abnormality detector that closes the circuit only in the event of an abnormality such as a fire outbreak is connected to the established emergency open circuit, so that only in the event of an abnormality, the shutter can be rolled up using battery power from an emergency switch or an extension cord. It is something.

Therefore, even if you make emergency switches and extension cords that can be operated from the outside, the shutter cannot be opened with these during normal times, so pranks and
There is no fear that the shutter will be opened by mistake or for the purpose of theft, and furthermore, it is extremely easy to operate, and because the mechanism and electric circuit are simple, it can be provided at a low cost.

[Brief explanation of drawings]

FIG. 1 is a vertical front view showing one embodiment of the apparatus of the present invention, and FIGS. 2 and 3 are circuit diagrams showing each electric circuit. 1... Winding cylinder, 7... AC motor, p
...Brake, 11...DC motor,
12...Clutch, 24...Battery, 25...Abnormality detector, 27...Emergency release circuit, 29...Extension cord, 30...
...Emergency switch, A...Emergency standby power supply circuit.

Claims (1)

[Scope of Claims] 1. An emergency DC motor is provided separately from the normal AC motor for shutter winding, and this DC motor and the shaft of the hoisting motor are removably connected by a clutch, and the AC motor is Separate from the power supply circuit for normal driving, the battery is closed to engage the clutch and become ready to drive the DC motor only when an abnormality detector that detects heat or smoke is activated. A shutter emergency release device that uses a power source as the power source and is equipped with an emergency release circuit that includes an emergency manual switch. 2. The shutter emergency release device according to claim 1, wherein an extension cord is connected to the emergency release circuit, and a clip terminal is provided at the tip of the extension cord to connect to a terminal of a battery of an automobile or the like.