JP2924849B2 - Manual / electric switching device for electric shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shutter, in which a clutch for transmitting the power of the shutter is released to release the brake state, and the shutter is manually opened and closed. That is, the present invention relates to a manual / electric switching device for an electric shutter.

[0002]

2. Description of the Related Art An electric shutter provided at an opening of a building or the like is a winding wheel that winds a shutter curtain around a sprocket in which a drive shaft of a motor and a sprocket are connected in a shutter case by a chain or the like. Are connected.

Accordingly, when the shutter is electrically opened and closed, the motor is driven to rotate the winding wheel via the sprocket, and the shutter curtain is wound and rewound to open and close.

[0004] When the electric shutter is stopped during opening and closing operations, or when the shutter curtain is fully opened or fully closed, the brake is automatically applied at the stop position so that the shutter curtain does not move up and down. It has become.

[0005] However, in such an electric shutter, if power is not supplied to the motor due to a power failure or the like, the brake is always in effect and the opening and closing operation of the shutter becomes impossible. . That is, the shutter stops in the fully closed state, the fully opened state, or in the middle of opening and closing, and cannot be opened and closed.

Therefore, recent electric shutters are provided with a clutch between a drive source such as a motor and a winding wheel so that power transmission can be released. A manual / electric switching device is provided so that the clutch can be disengaged by performing a remote operation via a wire or the like connected to the vehicle, the brake state can be released, and the shutter curtain can be manually opened and closed.

The manual / electric switching device is disposed on the side of the opening provided with the shutter, for example, near the guide rail for guiding the vertical movement of the shutter curtain, and is connected to the clutch via a wire. . This conventional manual / electric switching device will be described with reference to FIG.

[0008] This prior art includes a front plate 71 having a storage section 72 and a lever 7 stored in the storage section 72.
3, a slide plate 76 to which a wire 75 connected to the clutch is connected along the inner surface of the back cover 74 and which can move up and down, a link rod 77 connecting the lever 73 and the slide plate 76, and a lever 73. And a torsion coil spring 78 for applying a force.

The lever 73 is rotatably supported by a rotation shaft 79 provided near the center of the storage section 72. Then, the spring 78 acts on the locking portion 80 above the rotation shaft 79 of the lever 73 so that the entire lever 73 including the operation portion 81 below the rotation shaft 79 is stored in the storage portion 72. Working for. Further, the locking portion 80 of the lever 73 and the slide plate 76 are connected to each other by a link rod 77 so as to be able to interlock.

FIG. 8 shows an electric state, that is, a normal state in which the shutter curtain is opened and closed by a motor, and the slide plate 76 is in an upper position, that is, an electric position where the wire 75 is not pulled.

In order to switch the shutter curtain opening / closing operation from this state to the manual state, a finger is inserted from the insertion section 82 below the operation section 81 of the lever 73, and the operation section 8 is operated.
1 is turned upward, so that it is turned almost 180 degrees as shown by the imaginary line in FIG. At this time, the locking portion 80 is
8, the slide plate 76 descends via the link rod 77 and pulls the wire 75, whereby the clutch (not shown) is disengaged and manually operated. It is in a manual state in which the winding wheel can be rotated.

To return the opening and closing movement of the shutter curtain to the electric state again, the operation unit 81 is similarly moved downward by approximately 18 degrees.
The wire 75 is turned upside down through the link rod 77 to raise the slide plate 76 to release the towed state of the wire 75, and the clutch is connected to make the motor 75 electrically driven.

[0013]

However, in the above-described conventional manual / electric switching device, the lever 73 is moved to the storage portion 7.
In order to reciprocate inside 2, the rotating shaft 79 of the lever 73
Needs to be provided near the center of the storage section, and the operation section 81 of the lever 73 cannot be formed long.
The ratio of the locking portion 80 (hereinafter referred to as lever ratio) is 4:
It is about 1.

Therefore, there is a problem that the switching operation force for rotating the lever 73 is large, the lever 73 cannot be operated lightly, and the operability is poor.

Of course, it is conceivable to make the operating portion 81 of the lever 73 long. However, usually, the electric shutter to which the manual / electric switching device is attached has a dimensional limitation in the arrangement position, and the lever 73 is accommodated. The storage portion 72 cannot be formed long by forming the storage portion 72 vertically long.

The lever 73 and the slide plate 76
Is directly connected by the link rod 77, that is, the structure in which the state of the slide plate 76 is maintained by the link rod 77 and the lever 73, so that the operability of reciprocation of the lever 73 is improved. There is a problem of bad,
Further, the biasing force of the spring 78 in the reciprocating motion of the lever 73 always acts as a force for storing the lever 73 in the storage portion 72, and the reciprocating motion of the lever 73 cannot be easily performed. ing.

In order to solve the above-mentioned problems, the present invention provides a manual / electric switching device which is excellent in operability by reducing a switching operation force for switching from electric operation to manual operation and which does not return to an electric state inadvertently. It is intended to provide.

[0018]

Next, means for achieving the above object will be described with reference to the drawings corresponding to the embodiments. The manual / electric switching device 1 for an electric shutter according to the present invention is provided in a clutch 8 that transmits power between a driving source 6 and a shutter curtain winding unit 4 that constitute an electric shutter. In a manual / electric switching device for an electric shutter for switching a rotation between a manual state and an electric state, a case body 13 having a vertically long elongated storage section 12 on a front plate 11 forming a surface; A slide plate 14 arranged along the inner surface of the bottom wall constituting the main body 13 and connected to the wire 10 connected to the clutch 8 and capable of moving up and down in the vertical direction;
A lever 15 which can be swung about a rotation shaft 28 provided in the storage portion 12, a locking portion 29 extending above the rotation shaft 28 of the lever 15, and the slide Engaging means 16 for engaging the plate 14; a lock mechanism 17 for engaging the slide plate 14 to lock the slide plate 14 in the manual state; and a return operation for returning the slide plate 14 to the electric state. Means 18 for pivotally supporting the rotation shaft 28 of the lever 15 above the storage section 12, and the rotation shaft 2 of the lever 15
The operation unit 30 below the upper part 8 is formed to have the longest length to be stored over substantially the entire area of the storage unit 12, and the operation unit 30 is rotated to rotate the operation unit 30 through the engagement means 16. The slide plate 14 is returned to the original motorized state by the return means 18 when the plate 14 is lowered and locked in the manual state by the lock mechanism 17 and when the lock mechanism 17 is released. And

The lock mechanism 17 includes a support shaft 33 provided laterally on the case body 13, and a locking claw 34 rotatably provided on the support shaft 33 and abutting on the slide plate 14. A lock member 35 having a lock member 3
5 is provided with an urging member 37 having an urging force for bringing the locking claw 34 into contact with the slide plate 14, and a projection 38 protruding from the slide plate 14. The locking claw 3
4 and the projection 38 are locked and locked, and when the locking state of the locking claw 34 and the projection 38 is released against the urging force of the urging member 37, the slide plate 14 returns to the return position. The means 18 may be configured to return to the electric state.

The projections 38 protruding from the slide plate 14 may be formed in a plurality of steps in the vertical direction.

Further, as shown in FIG.
1 is a button 54 disposed on the slide plate 14 and slidable from the slide plate 14 toward the front plate 11, and an urging means 56 for urging the button toward the front plate 11. And a locking hole 48 drilled in the storage portion 46 and into which the button 54 fits, and the button 54 and the locking hole 48 are fitted at the position where the slide plate 14 is in the manual state. The slide plate 14 may be configured to be returned to the electric state by the return means 18 when locked together and the button 54 is pressed to release the fitted state with the locking hole 48.

The engaging means 16 and the lever 15
A gap that does not contact each other when the engaging means 16 and the engaging portion 29 are not engaged may be provided between the engaging portion 29 and the engaging portion 29.

According to the manual / electric switching device 1 for the electric shutter of the present invention configured as described above, the clutch 8 is normally operated, and the drive source 6 and the shutter curtain winding unit 4 are connected. The shutter curtain 2 can be opened and closed electrically. However, when power supply is not performed due to a power failure or the like, the operation unit 30 of the lever 15 is rotated to perform a switching operation.

The rotation of the lever 15 causes the lever 1 to move.
5, the locking plate 29 lowers the slide plate 14 via the engagement means 16, and the lock mechanism 17 sets the rotation of the shutter curtain winding unit 4 to a manual state. The clutch 8 is disengaged via the wire 10, and the shutter curtain 2 can be opened and closed by manual operation. When the lock mechanism 17 is released, the return means 18 allows the slide plate 14 to be released.
Rises, the clutch 8 is re-engaged via the wire 10, thereby returning to the electric state, and the shutter curtain 2 can be opened and closed electrically.

The display unit 2 displays a manual display 25 indicating the manual state and an electric display 26 indicating the electric state.
7 may be provided so that when the electric shutter is in a manual state or an electric state, these states are displayed by a manual display 25 or an electric display 26 of the display unit 27, and preferably, A window 27 is provided on the slide plate 14 and opens at a position corresponding to the display unit 27 on the front plate 11.
2, the manual display 25 or the electric display 26 in the display unit 27 is positioned at a position corresponding to the window 22 in correspondence with these states when the manual state or the electric state is set. I do.

According to the manual / electric switching device for the electric shutter of the present invention having such a configuration, in the electric state, the electric display 26 is positioned on the window 22 so that the discrimination can be performed.
Further, in the manual state, the manual display 25 is positioned on the window 22 so that the determination can be performed.

[0027]

FIG. 1 shows a first embodiment of the present invention.
4 through FIG.

FIG. 1 is a schematic front view of an electric shutter having a manual / electric switching device according to the present embodiment, FIG. 2 is a longitudinal sectional view of the present embodiment in an electric state, and FIG. 3 is a front view in FIG. FIG. 4 is a longitudinal sectional view in a manual state.

The manual / electric switching device 1 according to the present embodiment
As shown in FIG. 1, it is disposed on a wall, a floor, a guide rail, a sash frame, or the like near a shutter curtain 2 provided at an opening of a building. In the shutter case 3 arranged above the opening of the building, a winding wheel 4 as a shutter curtain winding portion is rotatably supported by bearings 5 and 5 provided on both side plates of the shutter case 3. The shutter curtain 2 is wound around the winding wheel 4.

A drive shaft of a motor 6 as a drive source disposed on one side of the shutter case 3 is connected to a sprocket 7 so as to be interlocked therewith. It is connected to the wheel 4.

Therefore, when the switch 9 disposed on the side wall of the opening is turned on, the motor 6 is driven, and the winding wheel 4 is rotated via the sprocket 7 and the clutch 8, and
The shutter curtain 2 is opened and closed.

This is an electric shutter which is operated by electric power, and is manually operated at the time of a power failure or the like. This is achieved by operating the manual / electric switching device 1 to disengage the clutch 8 connected by the wire 10. The shutter curtain 2 is opened and closed by rotating the sprocket 7 with a chain (not shown) to rotate the winding wheel 4.

As shown in FIGS. 2 and 3, the manual / electric switching device 1 includes a case body 13 having a housing 12 on a front plate 11, a slide plate 14 to which the wire 10 is connected, and a housing 12. , A locking mechanism 17 for locking the rotation of the take-up wheel 4 on the slide plate 14 in a manual state, and a return mechanism. And a return spring 18 as a means.

The case body 13 is composed of an elongated back cover 19 having a flat U-shape and a front plate 11 attached to the surface of the back cover 19, and has a rectangular box shape elongated vertically.

The front plate 11 has a storage portion 12 surrounded by a protruding ridge wall 20 which is elongated in the vertical direction and a middle wall 21 provided below the ridge wall 20. Therefore, as shown in FIG. 3, the storage portion 12 is a concave portion having a rectangular shape elongated in front.

A window 22 opens below the middle wall 21. As shown by the imaginary line in FIG. 2, for example, an exterior material 23 serving as an outer wall of a building is attached to the outer periphery of the ridge wall 20, the middle wall 21, and the window 22. The storage section 12 and the window 22 are exposed.

As shown in FIG. 2, the slide plate 14 is disposed along the inner surface of the vertical bottom wall 23 of the back cover 19 of the case body 13 and has a wire 1 at the upper end.
0 is connected, and is configured to be able to move up and down along the bottom wall 23.

The lower end of the front plate 11
It is bent in a substantially Z-shape to the side and extends along the back surface of the middle wall 21 and the window 22.

The lower end located on the back surface of the front plate 11 is located at a position corresponding to the window 22, and a manual display 25 indicating that the electric shutter is in a manual state.
The motorized display 26 indicating the motorized state (“Den” in FIG. 3)
Display section 27, for example, made of a seal
Is affixed.

In the manual state or the motorized state, the manual display 25 or the motorized display 26 is located at a position corresponding to the window 22 in correspondence with these states. 2 and 3 are in the electric state, the electric display 26 is located in the window 22 and the electric display 26 can be determined from the outside.

The lever 15 is provided on the storage section 12 so as to be rotatable about a rotation shaft 28 horizontally provided horizontally above the storage section 12 as a fulcrum. A portion extending above the rotation shaft 28 is a locking portion 29 for locking with the engagement means 16 described later, and a long portion below the rotation shaft 28 is an operation portion 30. The length of the operation portion 30 is formed to extend to the insertion portion 31 having a size that allows a finger formed below the storage portion 12 to enter. In the present embodiment, the lever ratio between the operation section 30 and the locking section 29 is 6: 1.

A spring 32 is wrapped around the rotating shaft 28 to bias the lever 15 in the storage portion 12 in the counterclockwise direction in FIG. The biasing force of the spring 32 is set to such an extent that the lever 15 is maintained in a retracted state.

The engaging means 16 is formed of a convex member protruding toward the front plate 11 at a position corresponding to the locking portion 29 of the lever 15 on the slide plate 14. As shown in FIG. 2, in a normal state of the lever 15, the locking portion 29 and the engaging means 16 are not in contact with each other, and a predetermined gap, for example, a gap of several mm is provided. When the lever 15 rotates, a predetermined play is provided.

As shown in FIG. 2, the lock mechanism 17 is disposed below the operation portion 30 of the lever 15, and has a support shaft 33 horizontally provided on the case body 13 and a rotation shaft around the support shaft 33. The locking claw 34 and the pressing portion 3 are movably mounted on the shaft.
6, a lock member 35 with a halfway bent in a substantially rectangular shape in cross section, a spring 37 provided inside the lock member 35 and biasing the locking claw 34 in a direction in which it comes into contact with the slide plate 14. The slide plate 14 comprises a projection 38 protrudingly provided.

When the locking claw 34 engages with the projection 38, the slide plate 14 is locked at a position where the rotation of the winding wheel 4 is set to the manual state. The lower part of the projection 38 is formed on an obliquely inclined surface.

In this embodiment, the return spring 18 is formed of a compression coil spring, and is inserted between the lower wall 39 of the case body 13 and the L-shaped bent horizontal portion of the slide plate 14, and 14 is the winding wheel 4
The function of returning the rotation of the motor to a position where the motor is turned to an electric state.

In the first embodiment configured as described above, normally, electric power is supplied to the motor 6, and the shutter curtain is opened and closed electrically. At this time, the clutch 8 is, of course, in a connected state.

When power is not supplied due to a power failure or the like, the shutter curtain is braked at the stop position. At this time, in order to manually open and close the shutter curtain, the manual / electric switching device 1 is operated.
This operation will be described in detail below.

First, a finger is inserted into the insertion portion 31 and the lever 1
5 is rotated upward until it hits the stopper 24. With this rotation, the locking portion 29 is moved by the engaging means 1.
6, the slide plate 14 is lowered. At this time, since there is a gap between the locking portion 29 and the engagement means 16, this gap becomes play at the beginning of rotation,
Thus, the operation unit 30 of the lever 15 can be easily hooked by a finger.

Then, the locking claw 34 of the lock mechanism 17
When the slide plate 14 descends because it is in contact with the slide plate 14 by the urging force of the spring 37,
The locking claw 34 rises while rubbing the inclined surface of the projection 38 against the urging force of the spring 37. Then, set the lever 15 to approximately 90 °
When the locking claw 34 is rotated to the same position, the locking claw 34 is rotated counterclockwise in FIG. To be in a position where the rotation of the winding wheel 4 is in the manual state. Further, the return spring 18 is compressed.

As the slide plate 14 descends, the wire 10 is pulled, and the power connection by the clutch 8 is released.

Then, the winding curtain 4 is manually rotated by a chain or the like (not shown) to open and close the shutter curtain.

In this manual state, the display 27
Also moves downward, and the manual display 25 is positioned in the window 22 so that it is possible to determine by looking at the display from the outside.

In this manual state, the lever 15 is
The operation unit 30 of the lever 15 is pressed by the pressing unit 3 of the lock member 35.
6 will be covered. At this time, the pressing portion 36 of the lock member 35 is not pressed by the lever 15 by the stopper 24 integrally formed with the front plate 11.

When the supply of electric power is restored, the rotation of the winding wheel 4 is returned to the electric state.
Is slightly lifted to expose the pressing portion 36 of the lock member 35, and the pressing portion 36 above the support shaft 33 of the lock member 35 is pressed with a finger. The locking state between the pawl 34 and the projection 38 is released.

At the same time, the slide plate 14 is raised by the urging force of the return spring 18, and the original motorized state is restored.
That is, the rotation of the winding wheel 4 is moved to a position where the wire 10 is electrically driven, the wire 10 is released from the pulled state, and the clutch is connected to return to the normal state.

Therefore, in the first embodiment, since the lever ratio is set to 6: 1, the conventional lever ratio (4: 4) is set.
Compared to the configuration of 1), the switching operation force by the lever 15 is about 3
This is reduced by 3%, and the structure is such that the swing range is about 90 ° instead of the conventional reciprocating movement, so that the manual / electric switching device 1 with excellent operability is obtained. Then, unless the lock mechanism 17 is released, the motor does not enter the electric state, so that the electric power is not inadvertently returned.

Further, the provision of the display unit 27 makes it possible to easily determine from the outside whether it is in the manual state or the motorized state.

The specific display of the manual display 25 and the motorized display 26 may be characters such as “hand” and “den”, or may be identified by colors such as red and blue. It may be a means for displaying, for example, lighting display by LED or the like.

Further, the operating portion 30 is formed longer,
The lever ratio difference may be further increased, for example, to 7: 1 or 8: 1.

Further, the return spring 18 is not limited to the arrangement position and the configuration according to the first embodiment described above, and any other return spring 18 acting on the slide plate 14 and returning to the initial position can be used. It may be attached to the place,
Other than a compression coil spring may be used.

Next, a second embodiment of the present invention will be described with reference to FIG. The same configuration or the same portion as the first embodiment is denoted by the same reference numeral, and the configuration and operation are omitted.

The manual / electric switching device 1 according to the second embodiment also includes a case body 13 having a storage portion 12 in a front plate 11, a slide plate 14, and a lever stored in the storage portion 12. 15 and engagement means 16
, A lock mechanism 17 for locking the slide plate 14 in a manual state, and a return spring 18, and the configuration and operation are substantially the same as those of the first embodiment.

The lock mechanism 17 is also disposed inside the operation portion 30 of the lever 15 and below the support shaft 3.
3 and a locking claw 34 rotatably mounted on the support shaft 33.
Locking member 35 provided with a pressing portion 36 and a locking claw 34
A spring 37 for urging the slide plate 14 in a direction in which the slide plate 14 comes into contact with the slide plate 14,
0, and the configuration and operation are almost the same.

However, as shown in FIG. 5, the projections 40 protruding from the slide plate 14 are
It is provided in a substantially sawtooth cross section.

Accordingly, the locking claw 34 of the lock member 35 is
Since the ratchet is formed so as to be locked at an arbitrary stage even during the movement, the slide plate 14 moves stepwise when the lever 15 is rotated to the manual state, and the wire 10 It becomes possible to secure traction.

Next, a third embodiment of the present invention will be described with reference to FIGS. It should be noted that substantially the same configuration and the same portions as those in the first and second embodiments described above are denoted by the same reference numerals.

FIG. 6 is a longitudinal sectional view of the third embodiment in an electric state, and FIG. 7 is a longitudinal sectional view in a manual state.

The manual / electric switching device 1 according to the present embodiment is also mainly housed in the case body 13 having the housing portion 46 on the front plate 11, the slide plate 14 to which the wire 10 is connected, and the housing portion 46. Lever 1
5, an engaging means 47 for engaging the lever 15 with the slide plate 14, a lock mechanism 41 for locking the slide plate 14 at a manual position, and a return spring.

The case body 13 has an elongated back cover 42.
A front plate 11 attached to the front surface at a predetermined distance from the back cover 42;
2 and a side member 43 connecting the front plate 11 on the side surface, and has a rectangular box shape that is elongated in the vertical direction.

The front plate 11 has a storage section 46 surrounded by a ridge wall 45 projecting in a vertically elongated front rectangular shape.

The slide plate 14 is connected to the case body 13
It is arranged along the inner surface of the back cover 42, which is the bottom wall of the above, the wire 10 is connected to the upper end, and is configured to be able to move up and down along the back cover 42 in the above two embodiments. Same as the form.

The lever 15 is provided on the storage section 46 so as to be rotatable about a rotation shaft 28 horizontally provided horizontally above the storage section 46 as a fulcrum.

The extending portion above the rotating shaft 28 is a locking portion 29 for locking with the engaging means 47, and the portion below the rotating shaft 28 is the operating portion 30.

The operation section 30 is formed to have a length extending to the vicinity of the insertion section 31. The lever ratio between the operation part 30 and the locking part 29 is set to 6: 1.

A spring 32 for urging the lever 15 in a counterclockwise direction in FIG.

A projection 49 is provided on the lever 15 at a position corresponding to a locking hole 48 of the lock mechanism 41 described later.

The engaging means 47 comprises a connecting member 50,
Shafts 51a and 51b are provided at both ends of the connecting member 50.

Then, the upper shaft 51a is loosely fitted in the elongated sliding hole 44 formed in the side surface member 43 and extending in the vertical direction, and the lower shaft 51b is turned around the support plate 52 erected on the slide plate 14. It is movably mounted.

The lock mechanism 41 includes a rod-like member 53 protruding from the slide plate 14 toward the front plate 11, a rod-like member 53 projecting forward of the rod-like member 53 and surrounding the outer periphery of the rod-like member 53. A button 54 slidably provided in the longitudinal direction of the button 54, and a spring 56 wrapped between a protrusion 55 provided on the button 54 and the slide plate 14 to bias the button 54 toward the front plate 11. , And a locking hole 48 formed in the storage section 46.

When the button 54 is fitted into the locking hole 48 of the slide plate 14 by the urging force of the spring 56, the slide plate 14 is moved to a position where the rotation of the winding wheel 4 is manual. Locked.

Although not shown, the return spring is inserted between the case body 13 and the slide plate 14.

Next, the operation of the third embodiment configured as described above will be described in detail.

First, a finger is inserted into the insertion portion 31 and the lever 1
5 is rotated upward. With this rotation, the locking portion 29 lowers the slide plate 14 via the engagement means 47.

At this time, the shaft 51a above the connecting member 50
Slides down the sliding hole 44 and descends.

When the button 54 of the lock mechanism 41 reaches the position of the locking hole 48, the button 54 is fitted into the locking hole 48 and locked by the urging force of the spring 56. Thereby, the slide plate 14 pulls the wire 10,
The clutch is disengaged, and the winding wheel 4 can be operated manually.

The lever 15 returns into the storage section 46 by the urging force of the spring 32. At this time, the lever 15
Is at a position where the projection 49 contacts the button 54, but the urging force of the spring 32 does not press the button 54, and the lever 1
The urging force is set such that the button 5 is accommodated in the storage section 46, and the storage section 46 is closed and the button 54 is covered.

When the supply of power is restored and the rotation of the winding wheel 4 is returned to the motorized state, first, the operating portion 30 of the lever 15 is pressed, and the button 54 is pushed by the projection 49 of the lever 15 to the spring 56. Push down against the urging force of.

As a result, the engagement state of the button 54 with the locking hole 48 is released, the lock mechanism is released, and the slide plate 14 is raised by the biasing force of the return spring, and the original electric state, that is, the winding state is achieved. The rotation of the take-off wheel 4 is moved to a position where the wire is electrically driven, the wire 10 is released from the pulled state, and the clutch is connected to return to the normal state.

The locked state may be released by pressing the button 54 with a finger.

The third embodiment also has a lever ratio of 6:
Since the setting is 1, the switching operation force of the lever 15 is reduced by about 33% as compared with the conventional lever, so that not only the manual / electric switching device 1 with excellent operability but also the button 54 of the lock mechanism 41 is operated. Unless the button is pressed, the motor will not be in the motorized state, so that the motor is not inadvertently reset.

Further, also in the third embodiment, the operating portion 30 may be formed longer, and the difference in lever ratio may be further increased, that is, the lever ratio may be set to 7: 1 or 8: 1.

[0093]

As described above, according to the manual and electric switching device for the electric shutter of the present invention, the operating portion of the lever is formed to have a sufficiently long length over substantially the entire area of the storage portion. The operating force is reduced as compared with the conventional lever, and the rotation of the shutter curtain winding unit can be switched between the manual state and the electric state with a small force, and the operability as a manual / electric switching device is extremely high. It will improve.

Further, the structure for sliding the slide plate for pulling the wire connected to the clutch is not a connection structure using the locking portion of the lever and a link, but the movement of the slide plate is lowered by leverage. The structure is such that the levers are engaged with each other only in the descending direction, so that the operation of the lever is smooth, and from this, the effect that the operability is improved can be obtained.

Further, a gap is provided between the locking portion of the lever and the engaging means which engages with the locking portion so that they do not come into contact with each other when they are not engaged with each other. Accordingly, play is provided in the rotation of the lever, and an effect that a finger is easily hooked at the time of operating the lever can be obtained.

Further, since the operability sufficiently improved can be realized within the limited size, the switching device can be obtained without changing the shape of the storage portion which is the size.

Further, since the lock mechanism is provided, the shutter is locked in the manual state, and the shutter does not return to the electric state unless the lock mechanism is released. There is an effect that safety can be maintained.

The lock mechanism operates only when switching from the electric state to the manual state. When the lock mechanism is released, the lock mechanism is provided with a biasing member between the locking claw of the lock member and the projection of the slide plate. The release operation is easy because the button is released by resisting the force and the button that fits into the locking hole is released by resisting the biasing force by the biasing means. Can be quickly restored.

Further, according to the manual / electric switching device for the electric shutter, since the display unit for displaying the electric state and the manual state is provided, an effect that the state of the electric shutter can be easily visually recognized can be obtained. In addition, there is an effect that it is possible to clearly indicate to others at the time of each operation.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an electric shutter equipped with a manual / electric switching device of the present invention.

FIG. 2 is a longitudinal sectional view of the first embodiment in an electric state.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a longitudinal sectional view of the same embodiment in a manual state.

FIG. 5 is a sectional view of a main part of a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a third embodiment of the present invention in an electric state.

FIG. 7 is a longitudinal sectional view of the embodiment in a manual state.

FIG. 8 is a longitudinal sectional view of a prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Manual / Electric switching device 2 ... Shutter curtain 4 ... Shutter curtain winding part (winding wheel) 6 ... Drive source (motor) 8 ... Clutch 10 ... Wire 11 ... Front plate 12, 46 ... Storage part 13 ... Case body DESCRIPTION OF SYMBOLS 14 ... Slide plate 15 ... Lever 16, 47 ... Engagement means 17, 41 ... Lock mechanism 18 ... Return means (return spring) 25 ... Manual display 26 ... Electric display 27 ... Display part 28 ... Rotating shaft 29 ... Locking part DESCRIPTION OF SYMBOLS 30 ... Operation part 33 ... Support shaft 34 ... Locking claw 35 ... Lock member 37, 56 ... Urging means (spring) 38 ... Projection 48 ... Locking hole 54 ... Button

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E06B 9/74 E06B 9/56

Claims (7)

(57) [Claims] 1. An electric shutter provided in a clutch for transmitting power between a drive source constituting an electric shutter and a shutter curtain take-up unit, and switching the rotation of the shutter curtain take-up unit between a manual state and an electric state. Manual
In the electric switching device, a case body having a vertically elongated elongated storage portion on a front plate forming a surface, and a case body disposed along an inner surface of a bottom wall forming the case body and connected to the clutch. A slide plate that is connected to a wire that can be moved up and down in a vertical direction; a lever that is housed in the housing portion and that is swingable around a rotation axis provided in the housing portion as a fulcrum; An engaging means for engaging a locking portion extending above a rotation axis with the slide plate; a locking mechanism for engaging with the slide plate and locking the slide plate in the manual state; A return means for returning the slide plate to the electric state; and an operation unit that pivotally supports the rotation axis of the lever above the storage unit and is lower than the rotation axis of the lever. The slide plate is formed so as to be long enough to be stored over substantially the entire area of the storage unit, and the slide plate is lowered via the engagement means by rotating the operation unit, and the manual operation is performed by the lock mechanism. A manual / electric switching device for the electric shutter, wherein the slide plate is returned to the original electric state by the return means when the lock mechanism is locked and the lock mechanism is released. 2. The lock mechanism according to claim 1, wherein the lock mechanism includes a support shaft laterally provided on the case main body, and a lock member including a locking claw rotatably provided on the support shaft and abutting on the slide plate. An urging member having an urging force for bringing the locking claw of the lock member into contact with the slide plate, and a projection protruding from the slide plate, at a position where the slide plate is in the manual state. When the locking claw and the projection are locked and locked, and when the locking state between the locking claw and the projection is released against the urging force of the urging member, the slide plate is moved by the return means. The manual / electric switching device for an electric shutter according to claim 1, wherein the device is configured to return to an electric state. 3. The manual / electric switching device for an electric shutter according to claim 2, wherein the projections protruding from the slide plate are formed in a plurality of stages in the up-down direction. 4. A button provided on the slide plate and slidable from the slide plate toward the front plate, and an urging device for urging the button toward the front plate. Means, and a locking hole formed in the storage portion and into which the button fits. At the position where the slide plate is in the manual state, the button and the locking hole are fitted and locked. 2. The manual operation of the electric shutter according to claim 1, wherein when the button is pressed to release the engagement state with the locking hole, the slide plate returns to the electric state by the return means. -Electric switching device. 5. A gap is provided between the engaging means and the locking portion of the lever, the gap not contacting each other when the engaging means and the locking portion are not engaged. The manual / electric switching device for an electric shutter according to any one of claims 1 to 4, characterized in that: 6. A display unit for displaying a manual display indicating the manual state and an electric display indicating the electric state, wherein when the electric shutter is in the manual state or the electric state, these states are displayed on the display unit. 2. The display according to claim 1, wherein the display is performed by a manual display or an electric display.
6. The manual / electrically-driven switching device for an electric shutter according to any one of items 5 to 5. 7. The display unit is provided on the slide plate, and a window is formed in the front plate at a position corresponding to the display unit. The window corresponds to these states in the manual state or the electric state. The manual / electric switching device for an electric shutter according to claim 6, wherein the manual display or the electric display on the display unit is positioned at a position corresponding to the window.