JPH06240964A - Driving structure of winding drum - Google Patents

Abstract

PURPOSE:To make a shutter in closure able to be speedily opened in time of emergency due to a fire, an earthquake or the like. CONSTITUTION:An internal gear 16a is coaxially fitted in an inner circumferential surface 8b of a winding drum 8, and an external gear 29 provided with a disklike moving iron plate 30 tight in one side face is engaged with the inner gear 16a free of slide motion in the axial direction, while a solenoid clutch mechanism 17 attracting the moving iron plate 30 is installed in the end of an output shaft 9a of a drive motor 9. In succession, the solenoid clutch mechanism 17 is connected to a driving power source A of the motor 9, and in linkage with on-off operation of this driving power source A, the connection between the drive motor 9 and the output shaft 9a is intermitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter drum for opening and closing an opening of a building or a window, and in particular, the shutter in a closed state can be quickly opened in an emergency such as a fire or an earthquake. The present invention relates to a drive structure of a winding drum.

[0002]

2. Description of the Related Art Conventionally, in a shutter for raising and lowering a shutter curtain by winding and rewinding a take-up drum containing a drive motor, since the drive motor is directly connected to the take-up drum, the shutter can be opened during a power failure. In an emergency situation such as a fire or earthquake, it is extremely difficult to quickly escape people trapped indoors, which poses a serious safety risk.

Therefore, a clutch that can be manually engaged and disengaged is interposed between the drive motor and the drive mechanism of the winding drum,
It has been proposed that by disconnecting this clutch in the event of a power failure, the winding drum can be switched to the free rotation state and the shutter curtain can be opened manually.
Since this one requires a large force to disengage the clutch, it has the drawback that it is difficult to operate with weak women, the elderly, children, etc., and the disengagement operation part is restricted in placement. Therefore, it is proposed that the clutch is disengaged by exciting the electromagnet by supplying electric power from a battery separately provided instead of the manual disengagement operation of the clutch. In addition, it is not possible to perform a normal opening operation depending on the state of charge of the battery, which becomes unreliable, and the shutter can be opened safely and reliably in an emergency. The structure was eagerly demanded by consumers.

[0004]

In view of the above situation, the present invention returns to the origin of the drive structure of the winding drum,
It was devised to eliminate the conventional drawbacks, and the purpose is to rotate the winding drum during normal use and to open and close the shutter, An object of the present invention is to provide a drive structure for a winding drum, which can quickly and surely open the shutter in an emergency without incorporating any additional device and can remarkably enhance safety.

[0005]

In order to solve the problem, the technical means adopted by the present invention is a shutter including a bullet motor and a drive motor for urging a hollow drum body in the winding direction. A take-up drum, in which the internal gear is coaxially fitted to the inner peripheral surface of the take-up drum, and an external gear having a disk-shaped movable iron plate fixedly mounted on one side thereof is used as the internal gear. An electromagnetic clutch mechanism for adsorbing a movable iron plate is provided at the output shaft end of the drive motor while meshing so as to be slidable in the axial direction, and the electromagnetic clutch mechanism is connected to the drive power source of the drive motor to turn on / off the drive power source. It is characterized in that the external gear and the output shaft of the drive motor are connected and disconnected in cooperation with.

[0006]

[Operation] Therefore, according to the present invention, in an emergency such as a fire or an earthquake, the take-up drum can be surely switched to the free rotation state, the shutter curtain can be opened quickly, and it can be opened to the outside. Escape can be performed safely and reliably.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described in detail with reference to one embodiment shown in the drawings. In FIG. 1, reference numeral 1 denotes a shutter installed in a window opening 2 of a building.
Is provided with a storage case 5 above the window 4 into which the fittings 3 and 3'are laterally openably and closably inserted, and the slats 6 and 6 are connected in series in the storage case 5. The take-up drum 8 around which the shutter curtain 7 is wound is pivotally provided, and the shutter curtain 7 is wound and rewound by forward and reverse rotation drive of a drive motor 9 in the take-up drum 8 which will be described later. It is configured to open and close the window opening 2. Reference numeral 10 is a guide rail that is provided upright on both sides of the front portion of the window 4 and that guides both side edges of the shutter curtain 7 up and down.

As shown in FIG. 2, the take-up drum 8 has a hollow drum main body 8a and an ammunition machine 11 formed in a cylindrical coil shape, and a drive motor 9 having a reduction gear mechanism incorporated therein. It is configured. That is, the drum body 8a
The rotating wheels 12, 12 ′ are spaced apart and fixed to one side portion of the inside, and the main body of the fixed shaft 13 whose one end is fixed to the inner wall 5 a of the storage case 5 is fixed between the rotating wheels 12, 12 ′. An ammunition machine 11 is coaxially inserted into the fixed shaft 13 and has one end fixed to the rotating wheel 12 and the other end screwed to the fixed shaft 13.

A fixed base 15 integrally formed with a resin head 14 is fixed to the inner wall 5b of the storage case 5, and a drive motor 9 is axially mounted on the resin head 14 to form a drum body. 8a is loosely inserted and the output shaft 9a of the drive motor 9 has an inner peripheral surface 8b of the winding drum 8.
An electromagnetic clutch mechanism 17 connected to a rotary drive cylinder 16 fixed to the above is mounted, and the take-up drum 8 is mounted by the rotary wheels 12 and 12 'pivotally supported by the fixed shaft 13 and the resin head 14. It is rotatably supported.

As shown in FIG. 3, the electromagnetic clutch mechanism 17 is formed by connecting a base portion 19 around which slip rings 18, 18 are provided and a ring-shaped yoke 20 via fitting pins 21, 21 ... The tip of the output shaft 9a is connected to the base 19 via a flange 22 and a mounting bolt 23, and the sliding actuators 24, 24 for power feeding projecting from the drive motor 9 side are connected to the slip ring 1.
It is extended to face 8 and 18. In addition, the above yoke 2
The coil ring 25 is embedded in the insulating resin 25a in the peripheral region of 0, and the friction lining 26a is provided on the outer surface thereof.
Are circumferentially provided to form a friction attracting surface 26, and pressing disks 27, 27 ... Are radially embedded at predetermined intervals on the inner peripheral side of the coil ring 25. Two
8, 28 ... are constantly urged in the protruding direction.

On the other hand, the rotary drive cylinder 16 is provided with an internal gear 16a on one side peripheral edge thereof, and an external gear 29 is formed with external teeth 29a meshing with the internal gear 16a. Is provided so as to be slidable in the axial direction of the take-up drum 8, and the friction attracting surface 2 is provided on one side surface of the external gear 29.
A disk-shaped movable iron plate 30 that is in contact with 6 is screwed by a fixing bolt 31. Note that 32 and 32 are winding drums 8.
Bolts for fixing the rotary drive cylinder 16 to the
It is a terminal terminal for supplying electric power from the slip rings 18, 18 to the coil ring 25 via, and the electric power to the coil ring 25 of the electromagnetic clutch mechanism 17 is directly supplied from the drive power source A as shown in FIG. The drive power to the drive motor 9 is supplied from the drive power source A through the open / close switch B.

In the above structure, when the shutter curtain 7 is closed, when the driving power source A is first turned on, electric power is supplied to the coil ring 25 of the electromagnetic clutch mechanism 17 through the sliding actuator 24, and the coil is closed. When the ring 25 is excited, the yoke 20 becomes an electromagnet, and the movable iron plate 3
0 is attracted to the yoke 20 side and contacts the friction lining 26, and the external gear 29 is connected to the electromagnetic clutch mechanism 17. Next, when the open / close switch B is turned on, the drive motor 9
Is driven to rotate, and the rotational driving force is transmitted to the external gear 29 via the electromagnetic clutch mechanism 17 pivotally supported by the output shaft 9a thereof, and the internal gear meshes with the external teeth 29a of the external gear 29. The winding drum 8 rotates via 16a, and the shutter curtain 7 wound around the drum body 8a is rewound along the guide rails 10 and 10.

After that, when the window opening 2 is fully closed, a stop switch (not shown) is turned on to stop the rotational drive of the drive motor 9. At this time, the electromagnetic clutch mechanism 17 is operated.
Is kept connected to the external gear 29, and the shutter curtain 7 is kept fully closed by stopping the drive motor 7.

When such a shutter is closed, a fire,
When an emergency situation such as an earthquake occurs, the drive power source A is turned off to switch the coil ring 25 of the electromagnetic clutch mechanism 17 to the non-excited state, and the suction between the friction lining 26 and the friction lining 26 disappears. At the same time, the movable iron plate 30 that was in contact with the friction lining 26 was
The protrusion of the pressing disk 27 through the electromagnetic clutch mechanism 17
Then, the external gear 29, the rotary drive cylinder 16 and the drum body 8a are freely rotated by the gap g. When the shutter curtain 7 closed in this state is pulled up, the shutter curtain 7 is lifted by a slight upward power in combination with the livelihood of the ammunition machine 11 installed in the drum body 8a, and the shutter curtain 7 is wound on the winding drum 8. The window opening 2 can be opened by being wound. Therefore, people trapped indoors can quickly and safely escape from the open window opening 2.

Further, even when the rotational drive of the drive motor 9 is stopped due to a failure except during an emergency, the drive power source A is turned off to turn off the electromagnetic clutch mechanism 1.
After the connection between the drum 7 and the drum body 8a is released and the shutter curtain 7 is rewound, the drive motor 9 in the drum body 8a can be quickly taken out, and the work efficiency in failure repair can be improved.

In this embodiment, the electromagnetic clutch mechanism 1
Although the electric power to be supplied to the drive motor 7 is directly supplied from the drive power source A, and the drive power to the drive motor 9 is supplied from the drive power source A via the open / close switch B, the present invention is not limited to this. Instead, as shown in FIG. 6, power may be supplied to the electromagnetic clutch mechanism 17 by turning on / off the open / close switch B. In this case, a lock for holding the shutter curtain 7 at a predetermined closed position. By separately providing the tool, it becomes possible to immediately escape to the outdoors only by unlocking the locking tool without turning off the drive power source A in an emergency.

[0017]

In summary, the present invention is a shutter take-up drum including a bullet motor and a drive motor for urging a hollow drum main body in the take-up direction. An internal gear is coaxially fitted to the peripheral surface, and an external gear with a disk-shaped movable iron plate fixed to one side is meshed with the internal gear so as to be slidable in the axial direction. An electromagnetic clutch mechanism for adsorbing the movable iron plate is provided at the output shaft end, and the electromagnetic clutch mechanism is connected to the drive power source of the drive motor,
Since the external gear and the output shaft of the drive motor are configured to be connected and disconnected in cooperation with the operation of turning on and off the drive power source, the winding drum is rotationally driven during normal use to open and close the shutter. However, it is possible to switch the take-up drum to a free rotation state in an emergency such as a fire or an earthquake, without the need to install any additional device etc. The shutter can be opened quickly and reliably at the time, and the safety can be remarkably enhanced, and even when the drive motor is removed due to a failure, the power supply is cut off to disconnect the electromagnetic clutch mechanism from the drum body. It is a very useful new feature that can easily disconnect the connection and therefore can perform trouble repairs satisfactorily and improve work efficiency. It is intended to achieve the effect.

[Brief description of drawings]

FIG. 1 is a side sectional view of a shutter adopting a winding drum of the present invention.

FIG. 2 is a cross-sectional view showing the arrangement inside the winding drum.

FIG. 3 is an enlarged view of a main part of an electromagnetic clutch mechanism showing an upper half section in cross section.

FIG. 4 is an enlarged view of an essential part of the same showing a disengaged state of the electromagnetic clutch mechanism.

FIG. 5 is a connection diagram showing a power supply path to a drive motor and an electromagnetic clutch mechanism.

FIG. 6 is a connection diagram showing another example of a power supply path to a drive motor and an electromagnetic clutch mechanism.

[Explanation of symbols]

 8 winding drum 8a drum body 8b inner peripheral surface 9 drive motor 9a output shaft 11 bullet 16a internal gear 17 electromagnetic clutch mechanism 29 external gear 29a external tooth A drive power supply

Claims (1)

[Claims] 1. A take-up drum for a shutter, which comprises a bullet motor for energizing a hollow drum body in a take-up direction and a drive motor, wherein an internal gear is provided on an inner peripheral surface of the take-up drum. An external gear that is coaxially fitted and has a disk-shaped movable iron plate fixed to one side is meshed with the internal gear so that it can slide axially, while a movable iron plate is attached to the output shaft end of the drive motor. An electromagnetic clutch mechanism for adsorbing is provided, and the electromagnetic clutch mechanism is connected to the drive power source of the drive motor, and the connection between the external gear and the output shaft of the drive motor is interrupted in cooperation with the on / off operation of the drive power source. A drive structure for a winding drum, which is characterized in that it is configured.