JPH0310319Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a shutter installed at the entrance of a building, etc., which automatically locks when the shutter curtain is lowered and automatically locks when the shutter curtain is rolled up. This relates to an automatic locking device for shutters that can be unlocked automatically.

2. Description of the Related Art Shutters having a structure in which a shutter curtain formed by connecting a large number of slats is wound around a winding shaft were well known prior to the filing of this application, and are widely used in many buildings. Further, this type of shutter is also known to be equipped with an automatic locking device.

Problems to be Solved by the Invention However, the automatic locking device for conventional shutters electrically detects the completion of the winding and lowering of the shutter curtain, and locks and unlocks the shutter curtain using an electromagnetic solenoid or the like. Not only does the shutter curtain lift guide rail require complex electrical wiring, but the shutter curtain's lift detection element and wiring may malfunction or malfunction due to the influence of rainwater, dust, etc. It had a flaw that made it incapacitated.

Therefore, the present invention eliminates the need for elements for detecting the elevation of the shutter curtain, electromagnetic solenoids for locking and unlocking, and electrical wiring for the elevation guide rail, etc., and uses an extremely simple mechanism to ensure reliable operation. The object of the present invention is to provide an automatic locking device for a shutter that can perform locking and unlocking operations.

Means for Solving the Problems The present invention has the following technical means for achieving the above object. That is, in a shutter configured to wind up a shutter curtain formed by connecting a number of slats onto a take-up shaft, there is a rotary body interlocked with the take-up shaft via a sliding clutch, and an upper end connected to the rotary body. , consists of an operating bar that moves up and down, respectively, as the take-up shaft rotates in the winding direction and the pulling down direction of the shutter curtain, and a latch mechanism attached to the shutter curtain. The lower end is fixed in the upward movement position, and the lower part of the operating bar has a bendable latch part that projects into the elevator guide rail of the shutter curtain when the actuating bar moves downward and retracts when it moves upward. An automatic locking device for a shutter characterized by the following:

That is.

Function: A shutter curtain made up of a large number of slats connected to each other is sequentially wound onto the winding shaft when the winding shaft is rotated in the winding direction. Further, the shutter curtain wound on the take-up shaft can be lowered by rotating the take-up shaft in the opposite direction. When the take-up shaft rotates in the winding direction, the rotating body interlocked with it through the sliding clutch rotates and the operating bar is moved upward, so that the latch portion of the operating bar stretches and becomes straight. The latch mechanism is released. Therefore, the shutter curtain can be rolled up. Also, if you rotate the take-up shaft in that direction to lower the shutter curtain,
The rotating body rotates in the opposite direction and the actuating bar moves downward. Therefore, the latch portion of the actuating bar is bent and protrudes into the elevation guide rail, so that the latch is engaged with the latch portion and locked when the shutter curtain is fully lowered.

Note that since the winding shaft and the rotating body are interlocked via a sliding clutch, the winding shaft can be freely rotated beyond the rotational range of the rotating body.

Example An embodiment of the present invention will be described with reference to the drawings.

In the drawings, reference numeral 1 denotes a winding shaft, which is rotated manually or electrically and winds up a shutter curtain formed by connecting a number of slats. 2 is a rotating body, and this rotating body 2 is interlocked via a sliding clutch 3. Another rotary body 4 is interlocked with the rotary body 2 by an interlocking bar, and the upper end of an actuation bar 5 is connected to this rotary body 4. It hangs downward along the sides. The operating bar 5 moves upward when the winding shaft 1 is rotated in the winding direction.
When it is rotated in the opposite direction, it moves downward, and the lower end of the operating bar 5 is fixed to the side surface of the lifting guide rail 6 by a rivet 7 at the upwardly moved position. A bendable latch part 8 having three pivot points is formed at the lower part of the operating bar 5. When the operating bar 5 moves downward, the latch part 8 bends and projects into the elevation guide rail 6. I'm starting to do that. Reference numeral 10 denotes a latch mechanism, and this latch mechanism 10 has a latch 12 that is supported by a spring 11.
2 has a shape that locks upward and slides downward. The latch mechanism 10 is mounted at a side end of the shutter curtain at a height such that it latches onto the latch hook 8 when the shutter curtain is lowered.

In the device constructed as described above, when the winding shaft 1 is rotated in the winding direction of the shutter curtain, the operating bar 5 moves upward and the latch hook 8 is moved upward.
When the winding shaft 1 is rotated in the direction in which the shutter curtain is pulled out (Fig. 1), the operating bar 5 moves downward and the latch 8 bends, causing it to move inside the lifting guide rail 6. It protrudes to (Figure 3).
Therefore, when the shutter curtain is raised, the latch hook 8 and the latch mechanism 10 are unlocked and automatically locked. Further, when the shutter curtain is completely lowered, the latch hook 8 and the latch mechanism 10 are engaged and automatically locked, and the shutter curtain cannot be opened from the outside.

Effects of the invention Since the present invention has the technical means and works as described above, the mechanism is extremely simple, it is not affected by rainwater or mud, and it is not affected by rainwater, mud, etc. This provides an extremely useful practical effect of reliably locking and unlocking operations.

[Brief explanation of drawings]

The drawings show an embodiment of the automatic locking device for a shutter according to the present invention, in which Fig. 1 is a side view showing the unlocked state, Fig. 2 is a plan view of the same, and Fig. 3 shows the locked state. Side view, Figures 4 and 5
The figures are cross-sectional views of the main parts showing the locked and unlocked states, respectively. Figure 6 is a plan view showing the relationship between the shutter curtain elevation guide rail and the operating bar. Figure 7 is a perspective view showing a part of the operating bar. It is a diagram. In the figure, 1 is a winding shaft, 2 is a rotating body, 3 is a sliding clutch, 4 is a rotating body, 5 is an operating bar, 6 is a lifting guide rail for the shutter curtain, 7 is a rivet, 8 is a latch part, 10 is a latch mechanism, 11
is a spring, and 12 is a latch.

Claims (1)

[Scope of utility model registration request] In a shutter configured to wind up a shutter curtain formed by connecting a number of slats onto a winding shaft, the winding shaft includes a rotating body interlocked with the winding shaft via a sliding clutch, an upper end of which is connected to the rotating body, and a winding shaft. It consists of an operating bar that moves up and down as the take-up shaft rotates in the direction of winding up and pulling down the shutter curtain, respectively, and a latch mechanism attached to the shutter curtain. The lower end is fixed in the upward movement position, and the lower part of the operating bar is formed with a bendable latch part that projects into the elevator guide rail of the shutter curtain when the actuating bar moves downward and retracts when it moves upward. An automatic locking device for a shutter, which is characterized by: