JP2525921Y2 - Safety device for electric shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention mainly relates to a safety device for an electric shutter using a slat curtain known as a lightweight shutter.

(Prior art) In this type of electric shutter, a curtain piece is formed by directly connecting curtain pieces (slat type curtain) or via a link (grill type shutter) to form a curtain, and guiding an end of the curtain piece. The curtain is opened and closed by moving up and down along the rails. Such an electric shutter is provided with a brake mechanism for the motor of the winding means, so that when the shutter is closed, even if the user attempts to open it by putting his hand on the lower part of the shutter, it is devised to prevent this. ing.

(Problems to be solved by the invention) However, the curtain pieces constituting the curtain are variable, which can be expanded and contracted in the elevating direction, due to the spatial space that can be bent in the guide rails and the play of the connecting points between the curtain pieces. Have the quantity. For this reason, even if the brake mechanism works to suppress the vertical movement of the curtain, if the hand is placed on the lower part of the shutter and lifted, the lower part of the shutter is opened to a considerable extent by the above-mentioned movable amount, and the security is improved. Safety is threatened.

Therefore, it is conceivable to use a locking means such as that employed in a manual shutter.However, when the motor is accidentally driven in the locked state and the curtain is raised, there is a risk of breaking the locking means and the shutter. Not preferred.

(Purpose of the invention) The present invention was made based on the above circumstances, so that even if the curtain is lowered and the curtain is lifted from below, the curtain is locked and cannot be raised. It is another object of the present invention to provide a safety device for an electric shutter in which the locked state is automatically released when the curtain is properly pulled up from above.

(Means for Solving the Problems) For this reason, in the present invention, as is apparent from the illustrated embodiment, the curtain pieces (2A) are rotatably connected to each other to form the curtain (2). In the electric shutter for opening and closing the curtain (2) by moving up and down the end of the curtain piece (2A) along the guide rail (3), the electric shutter is located inside the guide rail (3) and is adjacent to the shutter. A lock member (6) made of an elastic material that can be bent is bridged between the curtain pieces (2A), and a lock claw (7) is provided at a bent portion of the lock member (6), and the lock claw (7) is supported. Then, a hook portion (8) is fixedly provided in the guide rail (3), and when the interval between the curtain pieces (2A) is reduced, the lock member (6) is bent to lock the lock pawl (7). )
Can be locked to the hook portion (8).

(Function) Therefore, even if you try to raise the curtain by putting your hand on the lower part of the curtain, the lifting force causes the lower curtain piece (2A) to approach the upper curtain piece (2A) relatively. Then, the lock member (6) is bent and the lock claw (7) is moved to a position where it can be engaged with the hook (8) in the guide rail (3). 7) is locked by the hook portion (8) to prevent the curtain from rising. As a result, sufficient results in crime prevention can be expected. In addition, when the curtain is pulled up using a motor, the upper curtain piece (2A) is lifted, so that the upper curtain piece (2A) is relatively separated from the lower curtain piece (2A). It is pulled and its refraction state is eliminated. For this reason, since the lock claw (7) comes off the hook portion (8) and the above-mentioned locked state is automatically released, breakage or damage of the curtain or the like does not occur.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Shown here is a motorized shutter, which has the structure of a slat curtain. Here, a curtain 2 is provided in a shutter case 1 by a motor.
There is provided a winding means (not shown) for winding and rewinding the curtain. The curtain 2 derived from the shutter case 1 can be guided to both ends by a channel-shaped guide rail 3 and can be lowered to a closed state. The curtain 2 is composed of a combination of slat-shaped curtain pieces 2A formed into a predetermined cross-sectional shape by extrusion molding or the like.
2B and 2C are provided. And the curtain piece 2A
Are inserted inside the guide rail 3,
It serves as a guide for raising and lowering the curtain 2.

In particular, in this embodiment, at least the selected adjacent curtain pieces 2A, 2A are each provided with a pivot bracket 4, 4, to which a pivot pin 5, 5 is attached.
A U-shaped lock member 6 made of a material having some elasticity, such as plastic, pivots its upper and lower ends to the brackets 4 via the pivot pins 5. A lock claw 7 is formed or attached to the lock member 6 at a bent portion thereof, and a hook 8 is provided in the guide rail 3 correspondingly.

In such a configuration, when the curtain 2 is lowered and brought into the fully closed state, the lower curtain piece 2A is pushed up by a reaction force due to the floor surface being drained, and the upper curtain piece 2A. (See FIG. 4), the locking member 6 bends, and the locking pawl 7 is laterally protruded to a position where it can be engaged with the hook portion 8. Needless to say, the closed state of the curtain 2 may be maintained in a state where the drainer simply hits the floor surface. At this time, a predetermined interval is maintained between the curtain pieces 2A, 2A (see FIG. 5).

However, if the curtain 2 is to be raised irregularly by someone, the lifting force applied to the lower side of the curtain 2 reduces the relative spacing between the curtain pieces 2A, 2A as shown in FIG. As a result, if the hook slightly rises in this state, the lock claw 7 immediately engages with the hook portion 8 (see FIG. 6), thereby preventing the curtain 2 from rising. For this reason, an effective gap does not substantially occur on the lower side of the curtain 2, and a sufficient security effect can be exhibited.

In addition, when the curtain 2 is lifted by driving the motor to actuate the winding means as regular, the upper curtain piece 2A is suspended from the lower curtain piece 2A,
The relative interval is extended (see FIG. 5), and the lock claw 7 retreats and releases the engagement with the hook portion 8 (see the arrow), so that a smooth shutter opening operation can be performed.

In the above-described embodiment, the case of a slat curtain is given as a configuration of the shutter. However, in addition to this, a configuration in which a horizontal member is used as a curtain piece, such as a grill shutter, and the horizontal members are connected by a link. It is needless to say that the present invention can also be applied to the curtains. In this case, the play of the link and the horizontal member and the play in the guide rail determine the movable amount of expansion and contraction of the interval between the curtain pieces.

(Effects of the Invention) The present invention has been described in detail above. When the curtain is lowered and the hand is put on the curtain to lift it, the lock member is reduced due to a decrease in the interval between the curtain pieces located above the curtain. Is bent so that the lock claw can be engaged with the hook portion in the guide rail, so that pulling up of the curtain can be substantially prevented, and a security effect can be exhibited. In addition, when the curtain is raised in a regular manner, the locking of the lock claw is automatically released, so that there is no hindrance to the opening / closing operation of the curtain.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an embodiment of the present invention, FIG. 2 is an enlarged front view of a main part, FIG. 3 is a cross-sectional plan view of the same, and FIGS. It is a side end view showing a state. 2 ... curtain, 2A ... curtain piece, 3 ... guide rail, 6 ... lock member, 7 ... lock claw, 8 ... hook part.

Claims (1)

(57) [Scope of request for utility model registration] A curtain (2) is constituted by rotatably connecting curtain pieces (2A) to each other, and an end of the curtain piece (2A) is raised and lowered along a guide rail (3), In the electric shutter for opening and closing the curtain (2), a lock member (6) formed of an elastic member capable of being bent between adjacent curtain pieces (2A) positioned in the guide rail (3) is bridged, A lock claw (7) is provided at a bent portion of the lock member (6), and a hook portion (8) is fixedly provided in the guide rail (3) in correspondence with the lock claw (7). When the interval between the pieces (2A) is reduced, the lock member (6) is bent to lock the pawl (7).
A safety device for an electric shutter, characterized in that it can be locked to the hook portion (8).