JPH10266742A - Electric shutter with emergency opening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to open by remote control an electric shutter which is broken in the case of falling. SOLUTION: This electric shutter is so constituted that a coaxial motor 18 is incorporated in a winding drum 12 and that the coaxial motor 18 is driven to raise and lower shutter slats wound on the winding drum 12. In that case, balance springs 24 for reducing weight of the shutter slats are incorporated in the winding drum 12 and, an the same time, a clutch 20 capable of being intermittently controlled by a controlling device form a remote place is incorporated in a driving system between the coaxial motor 18 and winding drum 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shutter with an emergency opening device provided at an opening of a building or the like.

[0002]

2. Description of the Related Art An electric shutter using a motor as a drive source not only does not operate when there is a power failure but also has a speed reduction mechanism between the motor and the shutter. It takes a great deal of power. For this reason, if there is a power failure during a fire or the like, the shutter may not be able to be opened.

[0003] In particular, in the case of an electric shutter using a coaxial motor, a brake is mechanically applied when the motor is stopped, so that it cannot be lifted up by hand, and there is a problem that it is not possible to evacuate in an emergency. For this reason, as a structure in which a guide rail for guiding the raising and lowering of the shutter can be detached, there is also seen a structure in which the guide rail is detached and escaped from here in an emergency.

[0004]

However, such a structure also has a complicated structure, and the operation for removing it is not easy. The present invention has been made to solve the above-mentioned drawbacks of the conventional example, and provides an electric shutter with an emergency opening device which is easy to operate and can be installed in a small space.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention relates to an electric shutter which incorporates a coaxial motor into a hoist drum and drives the coaxial motor to raise and lower a shutter slat wound on the hoist drum. Emergency release device, which incorporates a balance spring for reducing the weight of the shutter slats, and a clutch that can be intermittently operated from a remote place by an operating tool in a drive system between the coaxial motor and the hoisting drum. Provide an electric shutter with

Further, according to the present invention, in the above means, the clutch interrupts the driving force by the detaching / connecting operation of the two clutch elements urged to the connection side by the spring, and the operating tool is disengaged. Provided is an electric shutter with an emergency release device, which is constituted by a wire having one end linked to one of the clutch elements that are in contact with each other, and the other end extended to a distant place.

According to the present invention, the above measures are taken, that is, even in an electric shutter using a coaxial motor,
Switching between manual operation and electric operation by remote operation can be performed to enable the shutter to be opened in an emergency, and in this configuration, the structure can be simple, low-cost, and space-saving. Further, since all the members such as the drive motor, the clutch, and the balance spring are housed in the hoisting drum, these components can be made compact.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 6 is a perspective view of the electric shutter,
FIG. 7 is a partial cross-sectional view. The electric shutter is one in which a hoist drum 12 is accommodated in a box 10 installed above an opening of a building, and a shutter slat 14 is attached to the hoist drum 12. is there. The shutter slat 14 is formed by connecting a large number of slat pieces 14a to bend up and down freely, is fitted into guide rails 16 provided on both sides, and moves up and down as a guide.

1 and 3 are cross-sectional views of the hoisting drum 12, and FIGS. 2 and 4 are a part of a vertical frame holding a guide rail 16 and the like on which a clutch operating tool incorporated in the hoisting drum 12 is provided. FIG. 1 is a sectional front view and a side view, and FIG.
FIG. 2 is a sectional view taken along line AA of FIG. 1, in which the hoisting drum 12 has a pipe shape, in which a coaxial motor 18, a clutch
The support shaft 22 and the balance spring 24 are incorporated.

The coaxial motor 18 has an output shaft 28 at the tip of a cylindrical stator 26 housed at one end of the winding drum 12.
The rear end of the stator 26 projects from the hoisting drum 12 and is fixed to the mount 30.
A clutch element A32 constituting the clutch 20 is fixed to the output shaft 28, and a clutch element B34 that engages and disengages with the clutch element A32 is engaged with the clutch element A32.

The clutch element B34 includes the hoist drum 12
And can be slid in the axial direction by being coupled dynamically. In this example, the winding drum 1
2 is provided with several radial ribs 12a on the inner periphery thereof, and a groove 3 on which the ribs 12a fit is formed on the outer periphery of the clutch element B34.
4a, the support shaft 22 is inserted from the other end of the hoisting drum 12, and the tip of the support shaft 22 is inserted into the hole 36 formed in the end face of the clutch element B34.

In this case, on the other end side of the winding drum 12, several support wheels 38 that rotate together with the same at a fixed interval are provided, and the support shaft 22 is passed through the support wheels 38. I support them. Therefore, the mount 30 and the support shaft 22 do not rotate, and by fixing both of them to the box 10, the winding drum 12 is rotatably installed.

A clutch element A3 constituting the clutch 20
2 and the clutch element B34 have the following structure.
The clutch element A32 has a cross-shaped engagement groove 3 on its end face.
2a, wherein the clutch element B34 is
This is a ring body which is slidably fitted to the clutch element A32 and has an inner projection 34b fitted on the inner surface of the groove 32a.

Accordingly, when the clutch element B34 is moved to the clutch element A32 side and the inward projection 34a is inserted into the engagement groove 32a of the clutch element A32, the two are connected, and the coaxial motor 18 and the hoist drum 12 are connected. Dynamically coupled. On the other hand, when separated and disengaged, the dynamic coupling is disengaged. That is, the power is intermittently operated by mutually separating and connecting operations.

In this case, the clutch element B34 is always urged toward the clutch element A32 by a spring 40 stretched between the clutch element B34 and the support wheel 38. The movement of the clutch element B34 is performed by an operating tool (a wire in this example) 42 having one end linked thereto and extending through the support shaft 22 to the outside.

That is, when the other end of the wire 42 is pulled, the clutch element B34 separates from the clutch element A, the clutch 20 is disconnected, and the winding drum 12 can rotate freely. The wire 42 is an inner wire 42
A double wire in which a is covered by the outer cable 42b is suitable.

As a form of extension of the wire 42, it is general that the other end of the wire 42 is extended downward through the inside of the vertical frame, and the lower end is fixed to a slide fitting 44 provided on the indoor side of the vertical frame. is there. The slide fitting 44 can be slid by operating a lever 46 which can be turned up and down.
2 is pulled and the clutch 20 is disconnected.

Therefore, in an emergency, the lever 46 is turned upward to make the rotation of the winding drum 12 free, and the shutter slat 14 is pushed up by hand. In this way, manual or electric switching can be easily performed simply by operating the lever 46 vertically. The wire 42
The tension of the wire 42 may be adjusted by adjusting the length of the wire 42 fixed to the slide fitting 44. In this example, the wire 42
Is fixed to the slide fitting 44 by screwing, so that the screw may be adjusted.

In this case, the lever 46 and the slide fitting 44
Are assembled into a mounting bracket 48 that can be easily removed from the vertical frame to form a set. To adjust the length of the wire 42, the mounting bracket 48 may be removed and screws may be adjusted. No complicated work inside is required. The lever 46 is provided with a recess 4 formed in the mounting bracket 48.
8a, so that safety and reliable positioning are ensured.

Further, a coil-type balance spring 24 for reducing the weight of the shutter slat 14 is incorporated between the support wheel 38 which rotates together with the winding drum 12 and the fixed support shaft 22. The strength of the balance spring 24 is set so that the shutter can be opened and closed by hand so that the driving force of the coaxial motor 18 can be suppressed small, and the motor is downsized.

As described above, in the event of a fire or the like, when the lever 46 is rotated upward, the wire 42 is pulled, the clutch element B34 is separated from the clutch element A32, and the power connection between the two is released. In this state,
Since the hoisting drum 12 can rotate freely, if the shutter slat 14 is pushed up by hand, an evacuation opening is secured here. Incidentally, by adjusting the strength of the balance spring 24, when the lever 20 is operated and the clutch 20 is disengaged, the shutter slat 14 can be automatically raised to such an extent that a person can enter and exit.

On the other hand, when the emergency situation is resolved, it is necessary to return to the normal state again.
May be rotated downward. When the lever 46 is rotated downward, the wire 42 is automatically pulled by the spring 40, and the clutch element B34 is moved toward the clutch element A32 to engage the two and connect the clutch 20.

By the way, the shutter slat 14 must stop when its vertical movement reaches the limit position. This is based on the following structure in this example. That is,
A tachometer for detecting the number of rotations of the hoisting drum 12 is attached to the hoisting drum 12 (not shown), and a predetermined amount of movement of the shutter slat 14 is detected as the number of rotations of the hoisting drum 12,
The drive of the coaxial motor 18 is stopped when the number of times reaches a predetermined number.

Therefore, when the shutter slat 14 is moved up and down, it can be operated manually or electrically.
2 rotates and measures the number of rotations in accordance with the amount of elevation, so that it is not necessary to readjust the tachometer even if switching between manual and electric is performed.

[0025]

As described above, in the present invention, the clutch is interposed between the coaxial motor and the hoisting drum. Therefore, the present invention can be applied to a motor using a coaxial motor that mechanically brakes when the hoisting drum is stopped. The clutch can be disengaged by the operating tool, and the shutter slat can be pushed up by freely rotating the winding drum. in this case,
Since the operating tool can be operated from a remote place, the intermittent operation of the clutch is safe and reliable. Further, since the driving motor, the clutch, the balance spring, and the elevation limit position detecting mechanism are all housed in the hoist drum, the box can be reduced in size and installed in a small space.

[Brief description of the drawings]

FIG. 1 is a sectional view of a hoist drum showing an example of the present invention.

FIG. 2 is a partially sectional front view and a side view of a vertical frame portion showing an example of the present invention.

FIG. 3 is a cross-sectional view of a hoist drum showing an example of the present invention.

FIG. 4 is a partial sectional front view and a side view of a vertical frame portion showing an example of the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 1;

FIG. 6 is a perspective view of an electric shutter showing an example of the present invention.

FIG. 7 is a cross-sectional view of an electric shutter showing an example of the present invention.

[Explanation of symbols]

 12 Hoisting drum 14 Shutter slat 18 Coaxial motor 20 Clutch 24 Balance spring 32 Clutch element A 34 Clutch element B 40 Spring 42 Operating tool

Claims (2)

[Claims] A coaxial motor is incorporated in a hoisting drum,
In an electric shutter that drives a coaxial motor to raise and lower the shutter slats wound on the winding drum, a balance spring that reduces the weight of the shutter slats is built into the winding drum, and a drive system between the coaxial motor and the winding drum is installed. An electric shutter with an emergency release device, which incorporates a clutch that can be operated intermittently from a remote place by operating tools. 2. A clutch according to claim 1, wherein the driving force is intermittently driven by a disengagement operation of the two clutch elements biased to the connection side by a spring. The electric shutter with an emergency release device according to claim 1, wherein one end is linked, and the other end is constituted by a wire extending to a distant place.