JPH0586788A - Opening unit which can be operated during power failure, in motor-driven blind shutter - Google Patents

Abstract

PURPOSE:To provide a motor-driven blind shutter which can be operated during power failure. CONSTITUTION:In an opening unit A for a motor-driven blind shutter, a motor output shaft 4 which is loosely fitted in a tubular motor shaft 3 and projected from the opposite ends of the latter, is fitted thereon with a worm wheel 7a. A worm 7b meshed with the worm wheel 7a is coupled to a manual control shaft 10. Accordingly, even upon power failure, slats of the motor driven blind shutter can be simply opened and closed, and further, it is possible to simply provide the above-mentioned arrangement at a low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blind shutter which can be manually operated at the time of power failure and which can be operated at the time of power failure.

[0002]

2. Description of the Related Art Conventionally, since an electric blind shutter is not equipped with a manual mechanism at the time of a power failure, it cannot be operated until the power failure is released.

[0003]

By the way, the electric blind shutter is a product that plays a shutter-like role in addition to the sunshade provided in the opening. In the event of a power failure with the electric blind shutter open, it cannot be tightened, which is a concern for crime prevention.In addition, when there is a power failure with the electric blind shutter closed, there is ventilation in the openings. In any case, it is demanded that a manual operation can be performed from the inside so that it can be opened and closed during a power failure.

[0004]

SUMMARY OF THE INVENTION Therefore, the inventor of the present invention, in an electric blind shutter opener / closer, fixes a worm wheel to a motor output shaft which is loosely inserted into a motor tubular shaft and protrudes on both sides thereof, A worm screwed to the worm wheel is connected to a manually operated shaft, and the manually operated shaft is an electric blind shutter that can be appropriately rotated at the time of a power failure. It can be manually operated, solves the above-mentioned problems, and achieves its purpose.

[0005]

Embodiments of the present invention will be described below with reference to FIGS.

The cross-sectional view shown in FIG. 1 is an electric blind shutter in which an opening / closing device A is provided on the upper part, and a plurality of slats 1, 1, ... Are suspended via a link mechanism (not shown). By rotating the opening / closing device A, the slat 1, 1 is configured to shade the opening from the upper side to the lower side. That is, the switch A
The slats 1, 1, ... Are opened and closed according to the elevation of the end of the chain C wound around the sprocket S provided at the end of the motor output shaft 4 described later.

Explaining the structure of the switch A,
As shown in FIGS. 2 and 3, reference numeral 2 is a motor part of the switch A, which is composed of a fixed coil 2a and an armature 2b, and the shaft center of the armature 2b has a hollow motor tubular shaft 3 Is stuck. Inside the motor tubular shaft 3, motor output shafts 4 projecting on both sides of the motor tubular shaft 3 are inserted to be rotatable.

A reducer 5 is provided on the other side of the motor unit 2. In the speed reducer 5, a planetary gear mechanism 5b is provided in a plurality of stages (three stages in the embodiment) in a speed reducer casing 5a. Planetary gear mechanism 5b is composed of a central gear 5b ₁ and the intermediate gear 5b ₂ and arms having gear 5b ₃ and the internal gear 5a ₁ of the inner reduction gear casing 5a. That is,
The first stage is the center gear 5b ₁ , the intermediate gear 5b ₂ , the armed gear 5b ₃ and the internal gear 5 from the right side in FIGS. 2 and 3.
a _{1 and} a part of the internal gear 5a ₁ and the intermediate gear 5b ₂ , the armed gear 5b ₃ and the internal gear 5a ₁ . In particular, the central gear 5b ₁ is fixed to one end of the motor tubular shaft 3. by this,
As one rotation of the ring gear 5b _1, its with arms at the third stage gear 5b ₃ and the motor output shaft 4 secured thereto is configured to be reduced to some tenths.

The speed reducer casing 5a is rotatable with respect to the end side of the motor section 2 and the motor output shaft 4.

Further, the motor section 2 is provided with an electromagnetic brake 6 so as to exhibit a braking action except when the motor section 2 is being driven.

Reference numeral 7 is a worm gear, which comprises a worm wheel 7a and a worm 7b, and the worm wheel 7a is fixed to the reduction cylinder end on the front end side of the speed reducer casing 5a. The worm 7b is screwed onto the worm wheel 7a. In the example, the worm 7
The axes of b and the worm wheel 7a are configured to be substantially orthogonal to each other, but this may be corrected to an appropriate angle.

The worm gear 7 can rotate especially from the worm 7b side, but cannot rotate from the motor output shaft 4 side. Theoretically, when the lead angle of the screw of the worm 7b is smaller than the friction angle, the worm wheel 7a cannot turn the worm 7b. The present invention exists as such an embodiment.

The upper and lower ends of the shaft rod 8 provided with the worm 7b are pivotally supported by a box 9 in which the speed reducer 5 is installed. An upper end side of a manual operation shaft 10 is pivotally supported immediately on the side of the shaft rod 8, and the manual operation shaft 10 and the shaft rod 8 are meshed with spur gears 11 and 11 fixed to both places. This is because, in this embodiment, the position of the manually operated shaft 10 is provided on the outer side position so that the crank rod 12 can be easily rotated.

Although not shown, the shaft rod 8 provided with the worm 7b may be extended to serve as the manual operation shaft 10. That is, the shaft rod 8 of the worm 7b and the manually operated shaft 1
0 may be integrated.

Reference numeral 12a in the drawing denotes a hook portion, which is attached to the tip of the crank rod 12, and the hook portion 12a is
The manual operation shaft 10 is configured to be engageable with the ring-shaped portion 10a at the lower end. 13 is a shutter case, 14 is a wall,
Reference numeral 15 is a sash window.

[0016]

According to the present invention, in the electric blind shutter opening / closing device A, the worm wheel 7a is fixedly attached to the motor output shaft 4 which is loosely inserted into the motor tubular shaft 3 and projected to both sides thereof. Firstly, the worm 7b screwed into the continuous operation shaft 10 is connected to the manual operation shaft 10, and the manual operation shaft 10 is an open / close switch that can be operated during a power failure in an electric blind shutter that is appropriately rotatably provided during a power failure. Even when a power failure occurs, the slats 1, 1, ... Of the electric blind shutter can be opened and closed, and secondly, the configuration is simple and can be provided at low cost.

The effects will be described in detail below.
During electric operation, the reduction gear casing 5a is fixed by the self-locking of the worm gear 7 (the worm wheel 7a cannot rotate the worm 7b), the rotation of the motor is transmitted to the motor output shaft 4, and the electric blind is driven. The shutter opens and closes well.

In the event of a power failure, the worm 7b rotates by hooking the hook 12a of the crank rod 12 on the ring-shaped portion 10a of the manually operated shaft 10 and rotating the worm 7b. 5a itself is rotated, and electric blind shutter slats 1,
Elevating 1, ... can be operated easily.

Particularly, in the present invention, since the motor output shaft 4 which is loosely inserted into the motor tubular shaft 3 and protrudes on both sides thereof is provided, it is the motor tubular shaft 3 that the electromagnetic brake 6 is operating. Therefore, even if the electromagnetic brake 6 that stops the rotation of the motor is not released, the motor output shaft 4 is in the rotatable state, and therefore the operation at the time of power failure can be extremely simple.

Further, the ring-shaped portion 10a of the manually operated shaft 10
In addition, since there is no other operation such as releasing the brake simply by hooking and turning the hook portion 12a of the crank bar 12, anyone can easily operate.

Further, in the present invention, since the motor output shaft 4 is provided with the manual mechanism, unlike the conventional structure of the switch with operation during a power failure provided in the shutter, in particular, the two shafts are not in parallel, Therefore, there is an advantage that it can be installed in a small space and the configuration can be simplified.

If the manual operation shaft 10 is provided so as to be present between the slats 1, 1, ... And the sash window 15 as shown in FIG. Not only does it not damage the door, but it can also be used to lock doors.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a blind shutter provided with the present invention.

[Figure 2] Bottom view of the switch

FIG. 3 is an enlarged cross-sectional view of the main part of FIG.

FIG. 4 is a vertical sectional front view of a switchgear.

FIG. 5 is a perspective view of a main part of a switchgear.

FIG. 6 is a schematic perspective view of an opening / closing part.

[Explanation of symbols]

 A ... Switch 3 ... Motor tubular shaft 4 ... Motor output shaft 7a ... Worm wheel 7b ... Worm 10 ... Manual operation shaft

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hideo Hirabayashi 2-1-1 Nishishinjuku, Shinjuku-ku, Tokyo Sanwa Shatter Industry Co., Ltd. (72) Atsushi Miura 2-1-1 Nishishinjuku, Shinjuku-ku, Tokyo No. 1 Sanwa Shatter Industry Co., Ltd. (72) Inventor Yukio Murata 1-380 Nekefu, Ome-shi, Tokyo Yokogawa Sertsk Co., Ltd.

Claims (1)

[Claims] 1. In an electric blind shutter switch, a worm wheel is fixed to a motor output shaft that is loosely inserted into a motor tubular shaft and protrudes on both sides thereof, and a worm screwed to the worm wheel is a manually operated shaft. An open / close switch which can be operated during a power failure in an electric blind shutter, characterized in that the manually operated shaft is provided so as to be rotatable as needed during a power failure.