JP2549281Y2 - Electric shutter with push-up prevention mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shutter having a push-up prevention mechanism.

[0002]

2. Description of the Related Art Small and light shutters (including narrow shutters and grille shutters) installed in houses, etc.
May be lifted by hand from the outside and opened. Therefore, a locking device for preventing the shutter from being opened is required for security. As shutters provided with this type of locking device, Japanese Utility Model Publication No. 61-7334 and Japanese Utility Model Publication No. 2-14610 have been proposed.

[0003] In the former, a lock is attached between two adjacent core pipes at the left and right ends at an intermediate height position of a shutter, and the grid-like slat is fixed to a guide rail by locking the lock. is there. The latter includes a latch bar projecting into the guide rail, a fork member engaged with the latch bar by the ascending and descending movement of the shutter, and a ratchet wheel for restricting the rotational movement of the fork member at positions on both lower sides of the shutter. When the latch bar comes into contact with the forked member when the shutter descends and falls into the concave notch of the forked member while rotating the forked member, the forked member is locked by the ratchet and the up / down movement of the latch bar is performed. And interlocking with the release operation of the shutter opening / closing device, the blocking piece that electromagnetically prevents the rotation of the ratchet wheel is separated from the ratchet wheel to release the lock of the forked member.

[0004]

The above-mentioned conventional devices have the following disadvantages. That is, the former is locked,
The disadvantage is that the unlocking requires manpower, and the latter requires an electromagnetic opening / closing device for a locking device in addition to the driving device of the winding drum, and has a disadvantage that the manufacturing cost is high. The present invention has been devised in order to solve the conventional drawbacks, in which a push-up prevention bracket or a push-up prevention slat is provided between the upper part of the slat and the winding shaft, and the electromagnetic switch for the lock device is not required. When the shutter is closed, when the slat is forcibly pushed up from below, the push-up prevention bracket or the push-up prevention slat hits the shutter case or the front structure of the case, and the shutter is automatically prevented from being released. Is what you do.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a curvature is provided between a take-up shaft of a shutter and an upper slat connected to the take-up shaft so that the curvature can conform to the peripheral surface of the shutter take-up shaft. Attach a curved push-up prevention bracket or push-up prevention slat,
When the shutter is closed, when the slat is pushed up, the push-up prevention metal fitting or the push-up prevention slat moves around the fishing base and ascends, and hits the shutter case or the case front structure on the movement locus thereof. Another object of the present invention is to provide a shutter with a push-up prevention mechanism, wherein the shutter is automatically prevented from being released.

[0006] The push-up prevention metal fitting may be fixed so as to overlap with the surface side of several upper slats connected to the take-up side of the winding shaft.

[0007] The push-up prevention fitting is formed of a plate, a rod, a pipe, or a net.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described with reference to embodiments. 1 and 2 are views showing one embodiment of the device of the present invention.
FIG. 1 is a main part side view showing a closed state of a shutter in which a slat has been rolled down, and FIG. 2 is a main part side view showing a state in which a part of the slat has begun to be wound. FIG. 3 is a front view conceptually showing a shutter closed state.

In the drawings, reference numeral 1 denotes a take-up shaft of a shutter laterally provided in a shutter case 4 provided on a ceiling of a building, 2 denotes an electric switchgear for driving the take-up shaft, and 3 denotes the shaft 1 2 shows a roller chain that communicates with the switch 2. Reference numeral 6 denotes an outer lintel, which is a swallowing opening of the slat 5, 7 is an inner lintel, and 8 is a guide rail. The shutter slats 5 are interlocked with each other, and are raised or lowered along guide rails 8 erected on both sides of the opening of the building to open and close the opening of the building.

The push-up prevention mechanism of the present invention is disposed between the take-up shaft 1 of the shutter and the upper slat 5a connected to the take-up shaft via the fixing plate 9. That is, a push-up prevention fitting 10 or a push-up prevention slat 10b described later, which is curved so as to have a curvature adapted to the peripheral surface of the take-up shaft 1 when the shutter is taken up, is prepared, and this is provided with a shaft fixing plate 9, Attached between upper slat 5a.

The embodiment shown in FIGS. 1 and 3 has a constant curvature so as to be superimposed on the surface side of several upper slats (three slats in the example of FIG. 1) connected to the fishing side. The push-up prevention metal fitting 10 is fixed by a stud or the like, and the several slats are immovably connected. The distance H from the upper end of the lintel 7 to the center of the shaft 1 is designed to take more space in consideration of the maximum winding thickness of the slat winding. The distance H is about 125 mm. Therefore, the height of the push-up prevention bracket is also formed to a dimension corresponding to the height, and is usually about three slats long.

In the shutter of the present invention having the above structure, the push-up preventing fitting 10 or the push-up preventing slat 10b is previously curved so as to have a curvature adapted to the peripheral surface of the winding shaft 1, and these are fixed to the fixing plate. When the shutter slat is wound up, it is smoothly wound on the peripheral surface of the winding shaft 1 as shown in FIG. 2 because it is attached between the upper slat 9 and the upper slat 5a. There is no.
When the slat descends, the slat is suspended from above and the push-up prevention bracket or push-up prevention slat 10 is attached between the shaft fixing plate 9 and the upper slat 5a. It does not fall down and does not hinder the lowering movement of the slat.

However, when the shutter is closed,
If the slat is forcibly pushed up from below, the upper part of the shutter is locked by the take-up shaft 1, the opening / closing device 2 and the like, so that the push-up preventing bracket 10 or the push-up preventing slat 10b rotates the fishing base 9a. The shutter moves up as the center and rises, and hits the shutter case 4 or the case front structure A on its movement trajectory, and the shutter is automatically pushed up and released (see FIG. 4).

FIGS. 5 and 6 show another embodiment of the present invention. FIG. 5 is a side view of a main part showing a closed state of a shutter where a slat of a grill shutter is rolled down.
FIG. 3 is a side view of a main part showing a state in which a slat of the grill shutter is partially wound. As shown in the figure, a plurality of core pipes 11 laid parallel to each other are flexibly connected by a plurality of rows of connection links 12 arranged in parallel in a direction orthogonal to the core pipes 11 to form a lattice-shaped slat. The core pipe 11 passes through guide rails 13 erected on both sides of the opening of the building.
And the connecting portion of the connecting link 12 slides to open and close the shutter.

Also in the grill shutter of this embodiment, the push-up preventing bracket 20 is curved in advance so as to have a curvature adapted to the peripheral surface of the winding shaft 1, and these are disposed between the fixing plate 16 and the upper slat 15a. Attached to. Several upper slats (three slats in the example of FIG. 1) connected to the fishing base side are push-up prevention fittings 2 which are curved at a constant curvature so as to overlap on the surface side.
0 is fixed with a stud or the like, and the several slats are immovably connected. When the shutter is closed, if the slat is forcibly pushed up from below, the upper portion of the shutter is locked by the winding shaft 1, the opening / closing device 2, etc. The shutter case 4 or the case front structure A, which moves as a rotation center and rises, and is on its movement locus.
In this case, the shutter is automatically pushed up and released, as in the embodiment of FIG.

FIG. 7 shows an embodiment in which the shutter take-up shaft and the upper slat connected to the take-up shaft are provided on the peripheral surface of the shutter take-up shaft instead of the push-up prevention fitting 10 or 20. This is an example in which a push-up prevention slat curved to a curvature that can be used is attached. In addition, the push-up prevention fitting can be constituted by any of a plate, a rod, a pipe, and a net.

[0017]

[Effects of the Invention] As described above, in the present invention, a push-up prevention bracket or a push-up prevention slat is disposed between the upper part of the slat and the winding shaft, so that when the shutter is closed, the slat is forcibly pushed up from below. The push-up prevention fitting or the push-up prevention slat hits the shutter case or the case front structure, and the shutter is automatically prevented from being released. Therefore, this device cannot be easily touched from the outside, and it is possible to easily prevent the shutter from being intentionally lifted by hand such as mischief, thereby achieving the purpose of theft prevention. In addition, the present device does not require any special electromagnetic mechanism or control, and therefore has a high practical effect in that it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing a closed state of a shutter on which a slat is rolled down.

FIG. 2 is an essential part side view showing a state where a slat has been partially wound.

FIG. 3 is a front view conceptually showing a shutter closed state.

FIG. 4 is an explanatory view conceptually showing a movement of a push-up preventing bracket when a slat is forcibly pushed up from below when a shutter is closed.

FIG. 5 is a side view of a main part showing another embodiment of the present invention, showing a closed state of a shutter in which a slat is rolled down.

FIG. 6 is an essential part side view showing a state in which the slat is partially wound.

FIG. 7 is a side view of another embodiment of the present invention, in which a push-up preventing slat is mounted between a take-up shaft of a shutter and an upper slat connected to the take-up shaft.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Winding shaft 2 Electric switch 3 Roller chain 4 Shutter case 5 Slat 5a Upper slat 6 Outer lintel 7 Inner lintel 8 Guide rail 9 Fixing plate 10, 10b Push-up prevention metal fitting or push-up prevention slat 11 Core pipe 12 Connection link 13 Guide rail 15a Upper slat 16 Fixing plate 20 Push-up prevention bracket

Claims (3)

(57) [Scope of request for utility model registration] 1. A shutter between a winding shaft of a shutter and an upper slat connected to the winding shaft.
Attach a push-up prevention fitting or a push-up prevention slat curved to a curvature so that it can fit into the shutter take-up shaft peripheral surface.When the shutter is closed, when the slat is pushed up, the push-up prevention fitting or the push-up prevention slat is attached. An electric shutter with a push-up prevention mechanism characterized in that the shutter moves automatically around the base of rotation and ascends, hits a shutter case or a front structure of the case on its movement trajectory, and the shutter is automatically prevented from being released. . 2. A plurality of upper slats, which are connected to the take-up side of the take-up shaft, are overlapped on the surface side.
An electric shutter with a push-up prevention mechanism, characterized in that a push-up prevention metal fitting curved to a constant curvature so as to be adapted to a peripheral surface of the winding shaft is fixed. 3. The electric shutter with a push-up prevention mechanism according to claim 1, wherein the push-up prevention fitting is one of a plate, a rod, a pipe, and a net.