JPH0745758Y2 - Locking device for architectural shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a locking device for a building shutter.

[Problems to be Solved by Prior Art and Invention] Generally, in a locking device for a building shutter, a latch on the seat plate side is locked to a latch on the guide rail side by the closing operation of the shutter curtain. There is one that can be locked automatically. However, conventionally, this locking device
As shown in Fig. 6, when the ratchet exceeds the latch hook,
Since the latch that moves down with the closing operation of the shutter curtain slides in the horizontal direction while being guided by the guide surface of the latch, it causes frictional resistance between the latch and the guide surface, which causes horizontal movement. There is a drawback in that the slide operation becomes heavy and an extra load is applied to the latch and seat plate.

Moreover, for example, when the shutter curtain is set to go up when closing, such as a window shutter, the latch will stop in the middle of the guide surface of the latch just by lightly closing the shutter. There is a fear that the lock will not be performed securely,
Even at the time of unlocking, the frictional resistance between the latch and the latch hook causes the unlocking operation to be unnecessarily heavy, which poses a problem.

Therefore, a hook-shaped latch is provided on the shutter curtain so that it can swing, and the latch retracts and swings to overcome the latch hook, so that the latch can be smoothly engaged with the latch hook. Advocated. However, in this case, when trying to push up the locked shutter curtain forcibly, there is a risk that the latch will swing toward the unlocking side and be unlocked, and there is a problem in crime prevention.

[Means for Solving the Problem] In view of the above-mentioned circumstances, the present invention was devised with the object of providing a locking device for a building shutter that can eliminate these drawbacks. In constructing a locking device for a shutter for construction by using a latch provided on the guide rail side and a latch provided on the shutter curtain side to lock and lock the latch when closing the shutter curtain. The latch has an upper end pivotally supported on the shutter curtain side via a support shaft so as to be swingable, has a hook-shaped latch claw formed on the lower portion, and is urged toward the latch hook. In addition, the locking operation of the latch accompanying the closing of the shutter curtain is configured to be performed by reciprocating swing around the spindle by contacting the latch with the latch hook, and Is projected toward the shutter curtain side from the support shaft position of the latch, and the latch hooked to the latch claw is set so as to reach the shutter curtain side position beyond the support position. It is what

The present invention, with this configuration, enables smooth movement of the latch during locking and unlocking operation, as well as excellent crime prevention.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a shutter curtain of a shutter provided in an opening of a building, and the shutter curtain 1 is a winding drum 3 installed in a shutter case 2.
The opening and closing are performed by being guided by the guide rail 4 and moving up and down in accordance with the forward and reverse rotation of the.

Reference numeral 5 denotes a seat plate provided at the lowermost end of the shutter curtain, and upper and lower ends of a latch 7 are swingably supported by a support shaft 8 on both left and right ends of the seat plate 5 via brackets 6. Has been done. Reference numeral 9 is a torsion bullet machine wound around a support shaft 8, one end of which is locked to the bracket 6 and the other end of which is latched to the latch 7. The torsion bullet machine 9 is a hook-shaped machine formed in the lower portion of the latch 7. The latch claw 7a is always urged so as to project from the side edge of the seat plate 5 toward the guide rail 4 side. On the other hand, one end of a connecting wire 10, which will be described later, is connected to the back side of the latch claw 7a so as to prevent the latch 7 from rotating more than a predetermined amount.
Does not touch the guide rail 4.

The inner surface of the guide rail 4 has a shutter curtain 1
A latch hook 11 is provided at a position corresponding to the latch 7 when fully closed. The latch hook 11 has a guide surface 11a inclined upward. And shutter curtain 1
When the lower side of the ratchet claw 7a comes into contact with the guide surface 11a, the ratch 7 retreats and swings against the twisting machine 9 with the support shaft 8 as a fulcrum, and when the latch claw 7a gets over the latch hook 11, By the action of the twisting ammunition 9, it swings back to the guide rail 4 side again, which causes the latch claw 7a to engage the latch hook 11 with the locking piece.
It is adapted to be locked by being locked to 11b, and at this stage, the lower surface of the seat plate 5 is just brought into contact with the floor surface or the like.

Then, the latch hook 11 holds the latch claw 7a in the locked state and the spindle 8
A structure projecting from the position toward the shutter curtain 1 side, and the latch hook 11 engaging with the latch claw 7a reaches the shutter curtain 1 side position beyond the position of the support shaft 8, that is, shown in FIG. The latch claw 7a of the latch hook 11 from the distance B from the bottom of the guide rail groove to the spindle 8.
The distance A to the locking tip position (corresponding to the substantial protrusion amount of the latch hook 11) with respect to the distance is set to be larger (A> B), whereby the shutter curtain 1 in the locked state is set. Is pushed up and the latch claw 7a catches the latch 11
When is strongly pressed, this pressing force does not generate a rotational moment that swings the latch 7 to the unlocking side.

An unlocking operation unit 12 is provided at the center of the seat plate.
13 is a mounting bracket that constitutes the unlocking operation unit 12,
An operation plate 14 is fitted in both side plates 13a of the mounting bracket so as to be vertically swingable. Further, 15 is a pair of left and right rocking bodies having a substantially inverted V shape, and the rocking bodies 15 are the operating arms 15a.
And swing arm 15b, and the pin shaft 1 near the corner.
It is swingably supported by the mounting bracket 13 by means of 6. The actuating arms 15a of the left and right rocking bodies 15 are provided so as to face each other inwardly, and the tips thereof are locked to the locking portions 14a projecting from the lower portion of the operation plate 14. On the other hand, the other ends of the left and right connecting wires 10 are respectively connected to the tip ends of the swing arms 15b. And operating plate 14
When the operation plate 14 is moved upward by holding the operation handle 14b provided on the upper part of the operating arm 15a, the operating arm 15a is pushed up by the locking portion 14a and moves upward, whereby each swing arm 15b moves inward. It swings and pulls the left and right connecting wires 10, whereby the latch 7 resists the twisting machine 9 and retracts until the latch claw 7a becomes substantially flush with the side edge of the seat plate 5. The shutter curtain 1 is oscillated, and in this way, the latch claw 7a and the latch hook 11 are unlocked by releasing the engagement between the latch claw 7a and the latch hook 11.

In the embodiment of the present invention constructed as described above, when the shutter curtain 1 is lowered, the shutter curtain 1 is automatically locked. That is, the latch 7 is the guide surface 11 of the latch hook 11.
When it abuts on a, it swings back and forth against the torsional ammunition 9 with the support shaft 8 as a fulcrum, whereby the latch claw 7a engages with the latch 11
Will be exceeded. And when it exceeds the latch hanging 11,
The latch 7 swings back by the action of the torsion bullet machine 9, and the latch claw 7a
Is locked by the latch hook locking piece 11b, and the shutter curtain 1 is locked so that its upward movement is restricted.

On the other hand, for unlocking, as described above, the latch 7 is retracted and swung by the unlocking operation section 12 to release the latch between the latch claw 7a and the latch hook 11.

As described above, in the embodiment of the present invention, the shutter curtain 1 can be automatically locked in cooperation with the closing operation of the shutter curtain 1. However, when the latch claw 7a crosses the latch hook 11, Instead of sliding horizontally as in the past, swinging and retracting with the support shaft 8 as the shaft center allows the latch 7 to operate very lightly and smoothly when locking without generating extra frictional resistance. Therefore, the load applied to the latch 7 and the seat plate 5 is significantly reduced, and the latch 7 can be prevented from stopping during the retracting operation, so that not only can the reliable locking be secured. It does not cause frictional resistance even during the unlocking operation.

Moreover, in this structure, the latch hook 11 projects toward the shutter curtain 1 side from the position of the support shaft 8 and
When the shutter curtain 1 is forcibly pushed up in the locked state, the latch of the latch claw 7a is latched when the shutter curtain 1 is pushed to the position closer to the shutter curtain 1 than the position (A> B). The lock on the hook 11 is the support shaft 8
Like the one that does not reach the shutter curtain 1 side position than the position (that is, it is located on the bottom side of the guide rail groove), the pressing force may cause a moment to swing the latch 7 toward the unlocking direction. Therefore, it can be locked and unlocked reliably and lightly, and can also be excellent in crime prevention.

It is needless to say that the present invention is not limited to the above-mentioned embodiment, and the biasing of the latch claw toward the guide rail side may be performed by its own weight instead of using a twisting ammunition.

[Advantages] In short, since the present invention is constructed as described above, the latch is not slid horizontally as in the prior art, but is swung and retracted around the support shaft so that the latch claw is latched. Since the locking operation that locks on the hook will be performed, the latch locking device will be operated very smoothly, thus significantly reducing the load applied to the latch and shutter curtain and avoiding malfunction due to friction. Even if the shutter curtain is lightly closed, it can be locked securely and the unlocking operation can be performed easily.

Moreover, since the latch hook protrudes to the shutter curtain side from the support shaft position of the latch, and the locking of the latch claw with the latch hook reaches the shutter curtain side position from the support shaft position, the shutter is locked in the locked state. When trying to push up the tar curtain forcibly, the moment that swings the latch in the unlocking direction does not act like it does not reach the shutter curtain side position, and it can be locked and unlocked. Although it is a reliable product, it is also excellent in crime prevention.

[Brief description of drawings]

The drawings show an embodiment of a locking device for a building shelter according to the present invention. FIG. 1 is an overall front view of the shelter, FIG. 2 is a front view of a seat plate portion, and FIG. FIG. 4 is a front view, a side view, a cross-sectional view, a bottom view of the unlocking operation portion of FIG. The figure is an operation explanatory view showing a conventional example. In the figure, 1 is a shutter curtain, 4 is a guide rail, 7
Is a latch, 7a is a latch claw, 8 is a support shaft, 9 is a twisting machine, 11
Is a latch.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location E06B 9/86

Claims (1)

[Scope of utility model registration request] 1. A locking device for a building shutter using a latch hook provided on the guide rail side and a latch provided on the shutter curtain side so as to lock and lock the latch hook when the shutter curtain is closed. In configuring
The latch has an upper end pivotally supported on the shutter curtain side via a support shaft so as to be swingable, has a hook-shaped latch claw formed on the lower portion, and is urged toward the latch hook. The latch is locked when the shutter curtain is closed, and the latch is engaged with the latch so that the latch is retracted around the spindle so that the latch can be moved to the latch position. Of the architectural shutter, which is projected toward the shutter curtain side, and is set so that the latch hooked to the latch claw is set to reach the shutter curtain side position beyond the support shaft position. Locking device.