JPH11350857A - Shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shutter capable of being opened easily at the time of emergency and becoming widespread easily. SOLUTION: A transmission open means 40 provided between an output shaft of a motor 24 and a winding barrel 3 consists of a clutch plate on main drive side 42 supporting the output shaft of the motor 24 so as to rotate, a clutch plate on driven side 41 supporting a driven shaft arranged coaxially with the output shaft, a coupling on main drive side 44 provided in an end part of the output shaft, and a coupling on driven side 43 engaged with the coupling on main drive side 44 and provided in an end part of the driven shaft. The clutch plate on main drive side 42 is connected with the clutch plate on driven side 41 so as to turn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter for opening and closing openings such as doorways and windows of a building, and more particularly to a shutter provided with an emergency opening device suitable for use as an electric shutter.

[0002]

2. Description of the Related Art Manually operated shutters are often used as window shutters for general houses and the like. However, the operation of the manual shutter is cumbersome, and in recent years, the usage ratio of the electric shutter has been gradually increasing. However, in the case of an electric shutter, it is necessary to open the shutter and secure a fire escape in the event of an emergency such as a power outage or fire, and an emergency opening device is provided as a means for that.

A conventional emergency release device includes a structure in which a side wall outside a guide rail for guiding a slat curtain is hinged to open the side wall outward in an emergency, and the slat curtain is pushed open with the side wall opened. Thus, a method of securing an opening is known. However, such a method requires considerable force to open the outer wall of the guide rail to the outside, and recovery of the guide rail requires mechanical knowledge and some procedures, making recovery difficult. It is.

On the other hand, the present inventor has previously proposed an emergency release device described in Japanese Patent Application Laid-Open No. 5-248158. In this method, a mechanical clutch mechanism is provided between the output shaft of the electric motor and the driven side shaft.In an emergency, the clutch mechanism is released by pulling a string or the like, and the slat curtain is lifted by hand. The shutter is opened. In such a method, the shutter can be easily opened and the recovery can be easily performed by simply returning the string as compared with a structure in which the side wall of the guide rail is pushed open.

[0005]

However, the clutch mechanism used in the emergency release device described in JP-A-5-248158 has the motor side and the driven side fixed, and the clutch is operated by lever operation. This is a meshing clutch that disengages the meshing. The meshing clutch is provided with claws that mesh with each other, and meshes or disengages the claws with each other to interrupt the transmission of the rotational force. Therefore, disengaging the dog clutch is
Although it is easier than the method of pushing and opening the side wall of the guide rail, the operation is still not easy for a young person, an elderly person, and the like because it still requires a considerably strong force.
Further, the meshing clutch has a complicated mechanism, so that the cost is high, and it is not sufficient for widespread use in general houses.

An object of the present invention is to provide a shutter which can be easily opened in an emergency and can be easily spread.

[0007]

Means for Solving the Problems (1) In order to achieve the above-mentioned object, according to the present invention, a winding drum is rotated by a motor, and a slat curtain is wound and wound on the winding drum to open and close. A shutter having transmission opening means provided between the output shaft of the motor and the winding drum, and operating means for operating the transmission opening means;
The transmission releasing means includes a main drive side clutch plate rotatably supporting the output shaft of the motor, a driven side clutch plate supporting a driven shaft disposed coaxially with the output shaft, and an end of the output shaft. A driven coupling provided at the end of the driven shaft while being engaged with the driven coupling. The driven clutch plate is provided with a driven clutch plate. Are connected so as to be rotatable. With this configuration, the clutch is disengaged and the slat curtain can be manually operated by rotating the driving side clutch plate with respect to the driven side clutch plate, so that the shutter opening operation in an emergency is easy. In addition, it can be easily spread.

(2) In the above (1), preferably,
The driving side clutch plate and the driven side clutch plate are rotatably connected at respective upper portions and are engaged with each other at respective lower portions. When the engagement is released, the driving side clutch plate and the driven side clutch plate are disengaged. The plate rotates relative to the driven clutch plate to release the connection between the driving side and driven side couplings. With this configuration, when returning, the motor can be returned by its own weight of the motor attached to the driving side clutch plate, so that the return operation can be easily performed.

(3) In the above (1), preferably,
The driving side clutch plate and the driven side clutch plate are rotatably connected near respective lower portions, and are engaged with each other at respective upper portions. When the engagement is released, the driving side clutch plate and the driven side clutch plate are disengaged. The clutch plate rotates relative to the driven clutch plate to release the connection between the driving side and driven side couplings. With this configuration, in an emergency, the driving side clutch plate can be rotated by its own weight of the motor attached to the driving side clutch plate, so that the opening operation can be easily performed.

(4) In the above (1), preferably,
The driving-side coupling and the driven-side coupling each have a plurality of claw portions arranged in a circumferential direction, and the claw portion of one coupling engages between the claw portions of the other coupling. A chamfered portion is provided on the outer peripheral side of each claw portion. With such a configuration, the connecting portions on the driving side and the driven side can be separated at a smaller angle.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a shutter according to an embodiment of the present invention will be described below with reference to FIGS. First, the overall configuration of the shutter according to the present embodiment will be described with reference to FIG. FIG. 1 is a perspective view showing the overall configuration of a shutter according to an embodiment of the present invention.

A balanced shutter 100 according to the present embodiment.
A pair of left and right guide rails 1a and 1b erected in parallel at predetermined intervals, a slat curtain 2 which is guided by the guide rails 1a and 1b to move up and down, and winds and unwinds the slat curtain 2 The winding drum 3, a balance device 10 provided on one end side of the winding drum 3, an operation unit 20 provided on the other end side of the winding drum 3, the winding drum 3, the balance device 1
0, a shutter case C for storing the shutter-side components of the operation unit 20.

The slat curtain 2 has an upper end slat 4a.
The long sides of the steel slats 4, 4,... Including the lower slats 4b are connected to each other in a bendable manner to form a single curtain.
Are connected to the winding drum 3 by fixtures 5a, 5b, 5c. Stoppers 2 are provided on both sides of the lower end slat 4b.
a and 2b are provided. 5 is a lower frame, and 6 is a vertical frame.

In this embodiment, the winding drum 3 is made of an octagonal steel pipe, and both ends thereof are rotatably supported by bearings (not shown). A first balance pulley 12 is fixed to the illustrated right end of the winding drum 3, and a large sprocket 22a is fixed to the illustrated left end. The first balance pulley 12 forms a part of the balance device 10. The large sprocket 22a constitutes a part of the operation unit 20. In addition, the winding drum 3 may be other shapes and materials other than the octagonal steel pipe.

The balance device 10 has a spring unit 18 supported at the upper corner of the shutter case C on the skeleton side. The spring unit 18 is configured to accumulate a spring torque according to the amount of rotation of the winding drum 3 when the slat curtain 2 is unwound, and a spring unit 18 is located adjacent to the first balance pulley 12 and connected to one end of the coil spring 18a. And two balance pulleys 14. Between the first balance pulley 12 and the second balance pulley 14, there is provided a stainless steel pulling wire 16 having one end connected to the first balance pulley 12 and the other end connected to the second balance pulley 14. I have. First
The balance pulley 12 has a larger diameter than the second balance pulley 14.

The spring unit 18 includes the coil spring 1
8a are fixed bosses 18 with both ends fixed by bolts, respectively.
b and a rotating boss 18c, and the fixed boss 18b is supported on a back plate of the shutter case C by a pedestal 18d. The detailed configuration and operation of the balance device 10 are described in detail in the previously filed Japanese Patent Application No. 9-240620.

The operation unit 20 includes a large sprocket 22
a, small sprocket 22b, and large sprocket 22a
A roller chain 22c suspended between the small sprocket 22b and the small sprocket 22b; a motor 24; and a transmission opening means 40 for intermittently transmitting the driving force from the motor 24 to the small sprocket 22b.

Large sprocket 22a and small sprocket 2
2b are connected by a roller chain 22c. Normally, the rotational driving force of the motor 24 is transmitted to the small sprocket 22b via the transmission opening means 40, and further transmitted to the large sprocket 2 via the roller chain 22c.
By being transmitted to 2a, the winding drum 3 rotates to wind up or rewind the slat curtain 2, thereby opening and closing the shutter. Note that a large pulley, a small pulley, and a timing belt may be used instead of the large sprocket 22a, the small sprocket 22b, and the roller chain 22c.

The detailed structure of the transmission opening means 40 will be described in detail with reference to FIG.
Normally transmits the rotational driving force of the motor 24 to the small sprocket 22b. However, by pulling a knob disposed on the indoor side (not shown), the wire tube 60
The operation wire 62 inserted therein is pulled to release the transmission of the rotational driving force from the motor 24 to the small sprocket 22b. Therefore, in an emergency, the knob is operated to open the transmission opening means 40, thereby pushing up the lower end of the slat curtain 2 so that the slat curtain 2 is wound around the winding drum 3 and the shutter is opened. Can be easily opened. Also, as described later, by returning the knob, the transmission opening means 40
The rotational driving force of the motor 24 can be transmitted to the small sprocket 22b.

The overall operation of the shutter 100 configured as described above and the basic operation of the balance device 10 are as follows. When the shutter 100 is at the fully open position, the slat curtain 2 is wound around the winding drum 3 until the stopper 2a hits the lower end of the front plate of the shutter case C.
At this time, most of the pulling wire 16 is wound around the second balance pulley 14, and the coil spring 18a is in the most loose state. When the winding drum 3 is rotated by the operation unit 20, the slat curtain 2 is unwound downward, and finally,
The lower end slat 4b stops at a position where it contacts the lower frame 5, and the shutter 100 is fully closed. During the unwinding of the slat curtain 2, the pulling wire 16 is wound from the second balance pulley 14 to the first balance pulley 12, whereby the second balance pulley 14 rotates and gradually winds the coil spring 18a. The spring torque corresponding to the rotation amount of the winding drum 3 is accumulated.

Conversely, when the winding drum 3 is rotated in the opposite direction by the operation unit from the fully closed position, the slat curtain 2 is wound up, and finally the stopper 2a comes to a position where the stopper 2a hits the end of the shutter case C. The shutter 100 stops, and the shutter 100 is fully opened. During such winding of the slat curtain 2, the spring torque accumulated in the coil spring 18a is released, and the operating force of the operating unit 20 is reduced. That is, the tension wire 1 is driven by the spring torque of the coil spring 18a.
6 is wound again on the second balance pulley 14, and the winding drum 3
To generate a rotational force, that is, a balance torque.
Balance with the gravitational torque (winding drum torque) of the slat curtain being unwound from.

Next, the detailed structure of the transmission opening means used in the shutter of this embodiment will be described with reference to FIGS. First, a state in which the transmission opening means according to the present embodiment is transmitting the rotational driving force from the motor to the small sprocket will be described with reference to FIGS. FIG.
FIG. 3 is a front view of an operation unit used for a shutter according to an embodiment of the present invention, and FIG. 3 is a side view of operation knob means arranged on the indoor side in the operation unit according to the embodiment; FIG. 5 is a bottom view of a main part of FIG.
FIG. 3 is a plan view of a main part of FIG. 2.

As shown in FIG. 2, a bearing 3a is provided inside the side plate of the shutter case C, and the winding drum 3 is rotatably supported by the bearings 3a and 3b. An end cap is attached to an end of the winding drum 3, and a rotation shaft 3b is provided at the center of the end cap.
Is rotatably supported by inserting the rotating shaft 3b into the bearing 3a.

The large sprocket 22a is attached to the end of the winding drum 3. The large sprocket 22a and the small sprocket 22b are connected by a roller chain 22c suspended between them. Small sprocket 2
2b is fixed to the intermediate shaft 51. The intermediate shaft 51 is
Housing plate 52 and driven clutch plate 4
1 are rotatably supported via sleeve bearings 53a and 53b. The housing plate 52 and the driven clutch plate 41 are arranged at a predetermined distance by a spacer pipe 54.

The transmission releasing means 40 includes a driven clutch plate 41, a driven clutch plate 42, first and second couplings 43 and 44, and a spring hook 45. The first coupling 43 is fixed to the intermediate shaft 51, and is connected to the small sprocket 22b.
The motor 24 is integrally formed with a gear head 24 a as a reduction mechanism, and is attached to the driving side clutch plate 42. The second coupling 44 is fixed to an output shaft of the motor 24 via a reduction gear in the gear head 24a.

The driven-side clutch plate 41 and the driven-side clutch plate 42 are connected at an upper portion thereof. The connection mechanism will be described later with reference to FIG. One end of the spring hook 45 is fixed to the driving side clutch plate 42, and the other end is engaged with the lower end of the driven side clutch plate 41. In the illustrated state, the output shaft of the gear head 24 a which is the driving shaft is used. And the axis of the intermediate shaft 51 which is the driven shaft coincides with the first coupling 4.
The third and second couplings 44 are normally engaged. Therefore, the rotational driving force of the motor 24 is transmitted to the small sprocket 22b via the first and second couplings 43 and 44.

The end of the operation wire 62 is attached to the spring hook 45 by a wire end ball 62a. The operation wire 62 is inserted into the wire tube 60.

Next, the configuration of the other end of the operation wire 62 will be described with reference to FIG. The operation side hardware 64 is fixed to a wall or a space surrounded by a sash and a slat curtain on the indoor side. The end of the wire tube 60 is fixed to the operation side hardware 64. A knob 66 is fixed to an end of the operation wire 62. Operation wire 6
2, the diameter of the wire end ball 62b fixed to
It is larger than the inner diameter of the wire tube 60, and the wire end ball 62b is engaged with the end of the wire tube 60.

Further, the configuration of the operating hardware 64 will be described with reference to FIG. FIG. 4 is a view of the operation side hardware 64 shown in FIG. 3 as viewed from below. On the operation side hardware 64,
A slit 64a is formed. The width of the slit 64a is wider than the diameter of the operation wire 62 and smaller than the diameter of the wire end ball 62b.

Next, the connection relationship between the driving side clutch plate 42 and the driven side clutch plate 41 will be described with reference to FIG. FIG. 5 is a diagram of FIG. 2 viewed from above,
2 denote the same parts. Two hook-shaped hook portions 42a are formed at the end of the upper surface of the driving side clutch plate 42. On the other hand, two square holes 41a are formed near the end of the upper surface of the driven clutch plate 41. The hook portion 42a of the driving-side clutch plate 42 is engaged with the square hole 41a of the driven-side clutch plate 41, and the driving-side clutch plate 42 and the driven-side clutch plate 41 are connected at their upper surfaces.

While the driven clutch plate 41 is fixed to the shutter case C, the driven clutch plate 42 to which the motor 24 is mounted is connected to the above-described connecting portion and the spring hook 45 shown in FIG. By being attached to the driven clutch plate 41 and being disengaged by the spring hook 45,
It is rotatable around the connecting portion. Further, when the driving side clutch plate 42 rotates, the outer surfaces of the side walls 42 b on both sides of the driving side clutch plate 42 slide and guide the inner surfaces of the side walls 41 b on both sides of the driven side clutch plate 41. Further, since the driving clutch plate 42 is inserted inside the driven clutch plate 41, even if the torque fluctuates, the displacement of the shaft center can be suppressed within an allowable range. In FIG. 5, illustration of the small sprocket 22b and the intermediate shaft 51 is omitted.

Next, the opening operation of the transmission opening means in an emergency will be described with reference to FIGS. FIG. 6 is a front view of the transmission opening means used in the shutter according to the embodiment of the present invention during an opening operation, and FIG. 7 is a side view of the operation side of the transmission opening means according to the embodiment. 6 and 7, the same reference numerals as those in FIGS. 2 and 3 indicate the same parts.

As shown in FIG. 6, when the operating wire 62 is pulled, the spring hook 45 is disengaged from the lower end of the driven clutch plate 41, and the driven clutch plate 42 is connected to the upper connecting portion. Rotate upwards. When the driving side clutch plate 42 rotates by an angle θ1 with respect to the driven side clutch plate 41, the engagement between the first coupling 43 and the second coupling 44 is released. Note that the angle θ1 is, for example, 6 °. Accordingly, the connection between the output shaft of the motor 24 and the small sprocket 22b is released, and the small sprocket 22b can freely rotate. Then, by pushing up the lower end of the slat curtain 2 shown in FIG. 1, the slat curtain 2 can be wound on the winding drum 3 and the shutter can be opened.

Here, referring to FIG.
The configuration of the operation unit for pulling the button will be described. When the knob 66 is pulled, the operation wire 62 connected to the knob 66 is pulled, and the transmission opening means 40 is opened as described above. When pulling the knob 66, the knob 66 is slightly pulled diagonally downward (left diagonally downward in the drawing). Then, in a state where the wire set ball 62b is pulled from the position of the slit at the lower end of the operation side hardware 64, the operation wire 62 is returned into the slit. Reference numeral 62 can hold the pulled state. The transmission release means 40 can maintain the open state.
Since the slat curtain is balanced by the balance device 10 shown in FIG. 1, the shutter can be easily opened.

The motor 24 and the gear head 24a
Is about 1 kg, and the force required to pull the knob 66 is about 2 kgf. Since the operation force for opening and closing the shutter in the balanced shutter according to the present embodiment requires 2-3 kgf, the emergency opening operation can be performed with the same or lighter force.

Next, the shapes of the first and second couplings used for the transmission opening means of this embodiment will be described with reference to FIGS. FIG. 8 is a side view of the first coupling of the transmission opening means used in the shutter according to the embodiment of the present invention, and FIG. 9 is a front view of FIG. The first and second couplings have the same shape.

The first coupling 43 has four claws 4
3a, 43b, 43c and 43d. Opening angle θ2 of each claw part 43a, 43b, 43c, 43d
Is, for example, 40 °, and the opening angle θ3 of the gap between the claw portions is 50 °. Also, the claw portions 43a,
The outer peripheral surfaces of 43b, 43c and 43d have chamfered portions 43x.
Is provided. Since the chamfered portion 43x is formed, cutting when the transmission of the driving force is cut off by the transmission opening means 40 is improved.

Next, an operation for returning the opened transmission releasing means will be described. In FIG. 7, when the operation wire 62 is tilted after pulling the knob 66, the wire set ball 62 b comes off from the slit of the operation side hardware 64.

As shown in FIG. 6, the self-weight of the motor 24 acts in the direction of arrow A, so that the manual-side clutch plate 42 is rotated by the self-weight of the motor 24 and the spring hook 45 is moved to the lower surface of the driven-side clutch plate 41 By engaging with the end, the first and second couplings 43 and 44 are engaged, and the transmission release means 40 is engaged. At this time, as described in FIGS. 8 and 9, the opening angle θ3 of the gap between the claw portions is larger than the opening angle θ2 of the claw portions, and moreover, the claw portions 43a, 43b, 43c, 43d Since the chamfered portion 43x is provided on the outer peripheral surface, the first and second couplings 43 and 44 are easily coupled.

The electric shutter can be used as a manual shutter by opening the transmission opening means not only in an emergency but also in a case where the power outage time continues for a long time.

As described above, according to this embodiment, the operating wire is pulled by pulling the knob, and the engagement by the spring hook is released, so that the transmission of the driving force by the transmission releasing means can be easily released. Therefore, the shutter can be easily opened in an emergency. In addition, since the power required at this time only needs to lift the motor slightly, even a weak person such as a young person or an elderly person can easily operate the motor. Further, at the time of restoration, the motor is lowered by its own weight by slightly pulling the knob to disengage the wire set ball from the operation side metal fitting, and the spring can be easily restored by engagement with the spring hook. Further, since a coupling is used for the engaging portion of the transmission releasing means and a simple mechanism is used, the cost can be reduced, and it can be easily spread to general houses and the like.

Next, the structure of the shutter according to the second embodiment of the present invention will be described with reference to FIGS. The overall configuration of the shutter according to the present embodiment is as follows.
It is the same as that shown in FIG. 1, and is particularly characterized by the configuration of the transmission release means. Therefore, FIGS.
In the following, the configuration of the transmission opening means according to the present embodiment will be described. The same reference numerals in FIGS. 2, 3, 6, and 7 denote the same parts. FIG. 10 is a front view of an operation unit used for a shutter according to the second embodiment of the present invention, and FIG. 11 is a side view of operation knob means arranged on the indoor side of the operation unit according to the present embodiment. is there.

As shown in FIG. 10, the transmission release means 40A
Are the driven side clutch plate 41A, the driven side clutch plate 42A, the first and second couplings 43 and 4,
4 is provided. The first coupling 43 includes the intermediate shaft 5
1 and connected to a small sprocket. The motor 24 includes a gear head 24 as a reduction mechanism.
a is integrated and attached to the driving side clutch plate 42. The second coupling 44 is fixed to an output shaft of the motor 24 via a reduction gear in the gear head 24a.

The drive side clutch plate 42A is connected to the driven side clutch plate 41A and
6 are connected. Driven clutch plate 4
1A and the upper end of the driving side clutch plate 42A,
Each is provided with overhead butting portions 41c and 42c. A wire end ball 62b attached to an end of the operation wire 62 is engaged with the overhead butting portion 42c of the driving side clutch plate 42A. The operation wire 62 passes through a hole formed in the overhead butting portion 41c of the driven-side clutch plate 41A. The operation wire 62 is inserted into the wire tube 60.

Normally, the operation wire 62 is pulled in the direction of arrow B, and the overhead butting portion 41c of the driven clutch plate 41A and the overhead butting portion 42c of the driven clutch plate 42A are made to contact each other. In the illustrated state, the axis of the output shaft, which is the main drive shaft, and the axis of the intermediate shaft 51, which is the driven shaft, coincide with each other, and the first coupling 43 and the second coupling 44
Are engaged. Therefore, the rotational driving force of the motor 24 is transmitted to the small sprocket via the first and second couplings 43 and 44. In FIG. 10, the small sprocket 22b and the large sprocket 22 shown in FIG.
Illustrations such as a are omitted.

Next, referring to FIG.
Of the other end will be described. The operation side hardware 64 is
It is fixed to a wall or the like on the indoor side. Wire tube 60
Is fixed to the operation side hardware 64. A knob 66 is fixed to an end of the operation wire 62. A slit as shown in FIG. 5 is formed in the lower part of the operation side hardware 64. The diameter of the wire end ball 62b fixed to the operation wire 62 is larger than the inner diameter of the wire tube 60 and the width of the slit, and the wire end ball 62b is engaged with the slit. The lower part of the operation side hardware 64 is formed of spring steel, and is configured to pull the operation wire 62 downward.

Next, an opening operation of the transmission opening means in an emergency will be described with reference to FIGS. FIG.
FIG. 13 is a front view of the transmission opening means used in the shutter according to the second embodiment of the present invention at the time of the opening operation, and FIG. 13 is a side view of the operation side of the transmission opening means according to the present embodiment.
12 and 13, the same reference numerals as those in FIGS. 10 and 11 indicate the same parts.

As shown in FIG. 12, when the operation wire 62 is loosened, the driving side clutch plate 42A is lowered by the weight of the motor 24, and rotates downward around the lower connecting pin 46. Drive side clutch plate 42A
Is at an angle θ4 with respect to the driven clutch plate 41A.
When the first coupling 43 rotates only, the first coupling 43 and the second coupling 44 are disengaged from each other. The angle θ4 is, for example,
15 °. Accordingly, the connection between the output shaft of the motor 24 and the small sprocket is released, and the small sprocket can freely rotate. Then, by pushing up the lower end of the slat curtain 2 shown in FIG. 1, the slat curtain 2 can be wound on the winding drum 3 and the shutter can be opened.

Here, referring to FIG.
The configuration of the operation unit for loosening 2 will be described. When the knob 66 is pulled in the horizontal direction, the operation wire 62 can be disengaged from the slit of the operation side bracket 64, and the operation wire 62 is pulled by the weight of the motor 24 as shown in FIG. Then, the wire set ball 62b
Is engaged with the end of the wire tube 60, and the transmission opening means 40A can hold the open state, so that the shutter can be easily opened. That is, in the present embodiment, the transmission opening means is opened in an emergency using the own weight of the motor, so that the emergency opening operation can be easily performed.

Next, an operation for restoring the opened transmission releasing means will be described. In FIG. 13, the knob 66
Then, the wire set ball 62b attached to the operation wire 62 is hooked on the slit of the operation side hardware 64, thereby easily returning to the state shown in FIG. Since the weight of the motor 24 and the gear head 24a is as light as about 1 kg, the knob 6
The force required to pull 6 is about 2 kgf. Since the operation force at the time of opening and closing the shutter in the balanced shutter according to the present embodiment requires 2 to 3 kgf, the return operation of the transmission opening means can be performed with the same or lighter force.

The first and second couplings 43, 44
As described with reference to FIGS. 8 and 9, the opening angle θ3 of the gap between the claw portions is larger than the opening angle θ2 of the claw portions, and further, the claw portions 43a, 43b, 43c, 4
Since the chamfered portion 43x is provided on the outer peripheral surface of 3d,
The first and second couplings 43 and 44 are easily connected. Further, since the chamfered portion 43x is provided, the engagement between the two couplings can be easily separated even at the time of opening.

As described above, according to the present embodiment, by pulling the knob, the operation wire is loosened by the weight of the motor, and the transmission of the driving force by the transmission releasing means can be easily released. The shutter can be easily opened. Also, at the time of recovery,
By pulling the knob to engage the wire set ball with the operation side metal fitting, it can be easily restored. In addition, since the power required at this time only needs to lift the motor slightly, even a weak person such as a young person or an elderly person can easily operate the motor.

As described with reference to FIG. 2, the structure in which the driven clutch plate and the driven clutch plate are connected at the top is used when there is no space at the bottom of the motor and there is space at the top. It is suitable for. Further, as described with reference to FIG. 10, the configuration in which the motors are connected at the lower portion is suitable for use when there is no space at the upper side of the motor and there is space at the lower portion. That is, an appropriate embodiment can be adopted according to the space around the motor.

In the above description, the driven-side clutch plate and the driven-side clutch plate are engaged at the upper portion as described in FIG. 2, or are connected at the lower portion as described in FIG. However, the connection position may be such that the connection is made at the side surface portion. In such a configuration, the own weight of the motor cannot be used when opening or returning the transmission opening means,
What is necessary is just to provide a spring which urges the driving side clutch plate toward the driven side clutch plate, or a spring which urges the driving side clutch plate away from the driven side clutch plate side.

[0055]

According to the present invention, in the electric shutter, the shutter can be easily opened in an emergency, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a shutter according to an embodiment of the present invention.

FIG. 2 is a front view of an operation unit used for a shutter according to an embodiment of the present invention.

FIG. 3 is a side view of operation knob means arranged on the indoor side in the operation unit according to the embodiment.

FIG. 4 is a bottom view of a main part of FIG. 3;

FIG. 5 is a plan view of a main part of FIG. 2;

FIG. 6 is a front view of the transmission opening means used in the shutter according to the embodiment of the present invention during an opening operation.

FIG. 7 is a side view of the operation side of the transmission release unit according to the embodiment.

FIG. 8 is a side view of a first coupling of a transmission release unit used for a shutter according to an embodiment of the present invention.

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a front view of an operation unit used for a shutter according to a second embodiment of the present invention.

FIG. 11 is a side view of operation knob means arranged on the indoor side in the operation unit according to the present embodiment.

FIG. 12 is a front view of a transmission opening unit used in a shutter according to a second embodiment of the present invention during an opening operation.

FIG. 13 is a side view of the operation side of the transmission opening means according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Guide rail 2 ... Slat curtain 3 ... Winding cylinder 4 ... Slat 10 ... Balance device 20 ... Operating unit 22a, 22b ... Sprocket 24 ... Motor 24a ... Gear head 40 ... Transmission release means 41 ... Drive side clutch plate 42 ... Drive side clutch Plate 43, 44 Coupling 45 Hook spring 62 Operation wire 100 Shutter

Claims (4)

[Claims] A slat curtain is wound and unwound on a winding drum to rotate the winding drum by a motor, and the slat curtain is opened and closed, and a transmission provided between the output shaft of the motor and the winding drum. A shutter having an opening means and an operating means for operating the transmission opening means, wherein the transmission opening means is arranged coaxially with the output shaft, the driving side clutch plate rotatably supporting an output shaft of the motor; A driven clutch plate that supports the driven shaft, a driven coupling provided at an end of the output shaft, and a passive side that is engaged with the driven coupling and provided at an end of the driven shaft. And a coupling, wherein the driving clutch plate is rotatably connected to the driven clutch plate. Over. 2. The shutter according to claim 1, wherein the main drive side clutch plate and the driven side clutch plate are rotatably connected at respective upper portions and are engaged with each other at respective lower portions. By disengaging the engagement, the main drive side clutch plate rotates with respect to the driven side clutch plate to release the connection between the main drive side and the driven side coupling. 3. The shutter according to claim 1, wherein the main drive side clutch plate and the driven side clutch plate are rotatably connected near lower portions thereof, and are engaged with each other at upper portions thereof. Disengaging the engagement causes the main drive side clutch plate to rotate relative to the driven side clutch plate to release the connection between the main drive side and the driven side coupling. 4. The shutter according to claim 1, wherein the driving-side coupling and the driven-side coupling each have a plurality of claw portions arranged in a circumferential direction, and one of the coupling portions has a claw portion. A shutter which is engaged between the claws of the other coupling and has a chamfer on the outer peripheral side of each of the claws.