JP2592080Y2 - Electric overdoor opening and closing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a motor-driven overclosure that closes an overdoor curtain by winding a wire around a winding drum rotated by an electric motor to open an overdoor curtain and rewinding the wire wound around the winding drum. The present invention relates to a door opening and closing device, and more particularly to a safety device at the time of closing operation of an overdoor curtain.

[0002]

2. Description of the Related Art A conventional electric overdoor opening / closing device of this kind is provided with a torque limiter in a drive system of a winding drum for winding or rewinding a wire for opening / closing an overdoor curtain, and when the overdoor curtain descends and closes, an overrunning device is provided. When the door curtain hits an obstacle and a torque abnormality occurs in the drive system, a structure is adopted in which the torque limiter does not slide and crush the obstacle.

[0003]

In the apparatus having the above-mentioned conventional structure, if the sensitivity of the torque limiter is made sensitive, the torque limiter slides when the overdoor curtain rises, so that the overdoor curtain does not open and the torque limiter does not open. If the sensitivity of the door is lowered, there is a problem that the obstacle is easily crushed and damaged when the overdoor curtain descends.

The present invention has been made in view of the above-mentioned problems, and when the obstacle is hit during the closing operation of the overdoor curtain, the closing operation of the overdoor curtain is stopped sensitively. An object of the present invention is to provide an overdoor opening / closing device that is reliably opened.

[0005]

The overdoor opening / closing apparatus of the present invention is an electric overdoor opening / closing apparatus for opening and closing an overdoor curtain with a wire wound around and wound back by a motor. A drive system that is rotated by an electric motor, an electromagnetic clutch that releases the fixing of the winding drum when the overdoor curtain is opened and closed, and a wire that is loosened when the overdoor curtain is opened and the wire is linked when the overdoor curtain is opened and closed; And a one-way torque limiter for canceling the link between the electric motor and the winding drum.

[0006]

According to the overdoor opening and closing device of the present invention, when the overdoor curtain is closed, the electromagnetic clutch is opened,
Release the fixing of the drive system linked to the electric motor, activate the one-way torque limiter provided in this drive system, and when the overdoor curtain hits an obstacle when the overdoor curtain descends, the wire that is rewound will loosen. Then, the rotation of the drive system is idled by the one-way torque limiter, and the lowering operation of the overdoor curtain is stopped. Also, when opening the overdoor curtain,
The one-way torque limiter is locked, and the over-door curtain is securely opened. Further, when the overdoor curtain is in the open state or the closed state, the electromagnetic clutch locks the drive system and the overdoor curtain is not opened or closed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3, left and right horizontal rails 11 are connected substantially horizontally from the upper ends of the left and right vertical rails 10, and the left and right vertical rails 10 and the left and right horizontal rails 11 are over-door curtains.
Guide pins (not shown) provided at both ends of the sliding door 12 are slidably guided to open and close the overdoor curtain 12.

An upper frame 14 is provided above the left and right horizontal rails 11 and above a column 13 for supporting the left and right vertical rails 10 and substantially parallel to the left and right horizontal rails 11. A rotary shaft 15 of the drive system is supported.

An electromagnetic clutch 16 is provided at one end of the rotating shaft 15.
The suctioned portion 18 is slidably sucked along the rotating shaft 15 with respect to the fixed suction portion 17 of the electromagnetic clutch 16.
The large-diameter sprocket is
19 is fixed.

A belt or a chain 22 is suspended around the large-diameter sprocket 19 and a small-diameter sprocket 21 a provided on the drive shaft 21 of the electric motor 20, and the large-diameter sprocket 19 is rotated by the electric motor 20.

A one-way torque limiter 25 is provided on the large-diameter sprocket 19, and the one-way torque limiter 25 is connected to the rotating shaft 15. And
Winding cylinders 26, 26 are fixed to both ends of the rotating shaft 15. The rotating shaft 15 between the winding drums 26, 26 is divided into a plurality of portions.
12 torsion coil spring for smooth opening and closing of 12
Connected at 7,27.

A wire 28 wound around the winding drums 26 and 26 is connected to the overdoor curtain 12.

Next, the operation of this embodiment will be described.

When closing the overdoor curtain,
When the electromagnetic clutch 16 is released and the fixing of the drive system linked to the electric motor 20 is released, the one-way torque limiter 25 provided in the drive system is operated. Then, when the electric motor 20 is driven,
The large-diameter sprocket 19 is rotated by the small-diameter sprocket 21a provided on the drive shaft 21 of the electric motor 20 and the chain 22 suspended around the large-diameter sprocket 19, and the rotary shaft 15 is rotated via the one-way torque limiter 25. The curtain 12 is lowered. When the overdoor curtain 12 hits an obstacle when the overdoor curtain 12 is lowered, the tension of the wire 28 to be rewound loosens, and the one-way torque limiter is released.
25, the rotation of the large-diameter sprocket 19 of the drive system idles, the rotating shaft 15 is stopped, and the lowering operation of the overdoor curtain 12 is stopped. When the electromagnetic clutch 16 is operated in the closed state of the overdoor curtain 12, the large-diameter sprocket 19 is fixed, and the overdoor curtain 12 is not opened.

When the over-door curtain 12 is closed, the one-way torque limiter 25 operates and the electromagnetic clutch 16 is provided, so that the braking device can be omitted.

When the overdoor curtain 12 is released, the electromagnetic clutch 16 is released to release the fixed drive system linked to the electric motor 20. Then, when the electric motor 20 is driven in the opposite direction, the one-way torque limiter 25 is locked at this time, the large-diameter sprocket 19 rotates on the electric motor 20 via the chain 22, and the rotating shaft 15 is rotated via the one-way torque limiter 25. It is rotated, and the overdoor curtain 12 is raised. When the overdoor curtain 12 is raised, the one-way torque limiter 25 is locked, and the overdoor curtain 12 is reliably opened. Further, when the overdoor curtain 12 is in the open state, the closing operation of the overdoor curtain is prevented by fixing the electromagnetic clutch 16.

Further, when the overdoor curtain 12 is opened, the one-way torque limiter 25 is set more sensitively than the holding torque of the torsion coil springs 27, 27, so that the wire 28 when the overdoor curtain 12 does not close due to its own weight. Slack can be avoided by the one-way torque limiter 25 slipping.

[0019]

According to the present invention, when closing the overdoor curtain, when the overdoor curtain hits an obstacle when the overdoor curtain descends and the wire to be rewound becomes loose, the one-way torque limiter is used. When the rotation of the drive system is stopped, the lowering operation of the overdoor curtain is stopped, and the overdoor curtain is opened, the one-way torque limiter is locked and the overdoor curtain is reliably opened. Further, when the overdoor curtain is open or closed, the electromagnetic clutch locks the drive system and the overdoor curtain is not opened or closed. Further, a braking device for the overdoor curtain can be omitted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a drive system of an electric overdoor opening / closing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of an electromagnetic clutch unit and a one-way torque limiter unit according to the first embodiment;

FIG. 3 is a perspective view of the electric overdoor opening and closing device.

[Explanation of symbols]

 12 Overdoor curtain 16 Electromagnetic clutch 20 Electric motor 25 One-way torque limiter 26 Roller cylinder 28 Wire

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E06B 9/02 E06B 9/80 E05D 15/24

Claims (1)

(57) [Scope of request for utility model registration] 1. An electric overdoor opening / closing device for opening and closing an overdoor curtain with a wire wound and unwound on a winding drum that is rotated by an electric motor, wherein the driving system rotated by the electric motor includes: An electromagnetic clutch for releasing the fixation of the winding drum during opening / closing operation, and interlocking the winding drum during opening operation of the over-door curtain and detecting loosening of the wire during closing operation to link the electric motor with the winding drum. An electric overdoor opening / closing device, wherein a one-way torque limiter for releasing is arranged in parallel.