JPH08193478A - Operation method of motor-driven safety shutter - Google Patents

Abstract

PURPOSE: To stabilize a lock device, and contribute to its cost reduction by constituting a shutter so that it stops once after it is slightly lowered in its early stages and successingly performs rising operation when shutter raising operation is performed. CONSTITUTION: In a motor-driven shutter using a spring at the same time which has an electromagnetic lock device 4 in a guide rail part 7, the shutter is constituted so that it stops once after it is slightly lowered in its early stages and successively starts rising operation when shutter raising operation is performed. In this slightly lowering period, the electromagnetic lock device 4 is chaged to an unlocking opening posture from a locking posture. In this way, since the shutter is once lowered at engaging time between a locking bar 3 and the lock device 4, a condition close to no-load appears in the lock device 4. Therefore, strong force does not act on the lock device 4, cost reduction and stabilization of the device can be realized at the same time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring-balanced electric shutter used for partitioning an opening of a building or a partition inside a building.

[0002]

2. Description of the Related Art Conventionally, an opening / closing device with a brake has been used for an electric shutter. However, due to the trend of the times, small spring-balanced shutters that were manually operated until now are often operated electrically, and even with such a shutter, even if it has a brake for opening and closing because the slat weight is light. , There is a problem that the shutter slat can be easily lifted by hand and slackened in the shutter case. In order to solve the problem, it is sufficient to attach a locking device as well as a conventional manual shutter to solve the problem. Is required.

However, even if the locking is automated, the spring balance shutter has a tendency to bounce when fully closed due to the balance, and when the shutter is raised as it is, it engages with the bounced locking bar mounted on the shutter slat. A strong force is required to release the engagement with the existing lock device, and deterioration of the lock device due to secular change becomes a problem if continuous operation is continued.

[0004]

The electric shutter combined with the spring according to the present invention is an automatic locking system which has been made to solve the above-mentioned inconvenience. The feature is that the locking device is activated during this state.

[0005]

Since the shutter is once lowered when the lock bar and the lock device are engaged with each other, the lock device is brought into an unloaded state.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a torque diagram of a shutter and a spring of a general spring balance shutter. Since the shutter torque 1 is smaller than the spring torque 2 at the upper and lower limits, the shutter tends to jump up.

FIG. 2 is a view showing an engaged state (when the shutter is closed) between the lock bar and the lock device when the shutter is fully closed. A lock bar 3 provided on the slat side of the shutter has a lock piece 4a of a lock device 4 provided on a rail 7.
Due to this, upward movement is blocked, and eventually the shutter is blocked from opening. As described above, the locking bar 3 is pulled upward by the balance spring (not shown). Therefore, when the shutter is raised in this state, the force of the spring is transmitted to the solenoid 6 through the lock bar 3, the lock piece 4a, and the step 5a of the cam 5, so that the solenoid 6 having a strong force is required to release the lock. However, the shutter is slightly lowered and the solenoid 6 is operated during that time to rotate the lock piece 4a clockwise so that the lock piece 4a does not engage with the lock 3.

FIG. 3 is an example of an ascending side flow chart for causing the shutter to perform the above operation. After the shutter is raised, the timer 1 times out (actually 0.
(1 to 0.5 seconds) and the solenoid 6 is activated during this time to open the lock, and then the timer 2 is stopped for the moment (0.1 to 0.2 seconds) before the rising operation. It is supposed to start. Since the solenoid is accompanied by mechanical movement,
It will not engage the locking bar in 0.2 seconds.

Although detailed description is omitted, if the control is allowed to be complicated, the operation is limited to when the shutter is fully closed (when the locking bar and the lock device are engaged), and for example, in the middle of the shutter. When the shutter is stopped (the lower limit switch (not shown) is not operated), the operation of temporarily lowering the shutter when the shutter is raised can be omitted.

[0010]

As is apparent from the above description, according to the present invention, when the shutter is raised, the lock device is slightly lowered at the initial stage and then raised, so that the locking device is not subjected to a great force and the cost of the locking device is reduced. The stabilization can be achieved at the same time, and the shutter motor can be prevented from being burnt out, which contributes to the quality improvement.

[0011]

[Brief description of drawings]

FIG. 1 is a torque diagram of a shutter and a spring.

FIG. 2 is a view showing an engaged state of a lock device and a lock device when the shutter is fully closed.

FIG. 3 is a portion of an ascending side flow chart.

[Explanation of symbols]

1 Shutter torque 2 Spring torque
3 Locking 4 Locking device 5 Cam
6 Solenoid 7 Guide rail

Claims (1)

[Claims] 1. A spring-equipped electric shutter having an electromagnetic lock on a guide rail portion, which is configured such that when the shutter is lifted, the shutter is slightly lowered, then temporarily stopped, and then the rising operation is performed. An electric shutter with a spring characterized in that the electromagnetic lock is changed from a locked position to an unlocked position.