JP2004332436A - Electric shutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric shutter that can be opened and closed by hand operation by having small burden of a person opening and closing the electric shutter in a simple mechanism. <P>SOLUTION: In the electric shutter having an opening and closing machine 12, the opening and closing machine rotates a winding part to open and close a shutter curtain 9, a one-direction transmission clutch 16 is interposed between the opening and closing machine and the winding part, transmission of rotating force from the opening and closing machine to the winding part is enabled and the rotating force from the winding part to the opening and closing machine is intercepted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric shutter for opening and closing an opening of an entrance and a window of a structure such as a building, and particularly to a lightweight electric shutter such as a window shutter.
[0002]
[Prior art]
2. Description of the Related Art As a device for opening and closing windows such as windows and doorways of structures such as buildings, there is an electric shutter equipped with an electric switch. The opening is opened and closed by moving it along. As the electric shutter, there is a lightweight electric shutter provided in a window or the like, and FIG. 7 shows the entire lightweight electric shutter.
[0003]
In the figure, 1 is a frame of a structure such as a building, 2 is an opening formed in the frame 1, 3 is a guide rail provided at both ends of the opening 2, and 4 is an upper end of the guide rail 3. Reference numeral 5 denotes a lower case provided at a lower end of the guide rail 3. The guide rail 3, the shutter case 4, and the lower frame 5 are respectively attached to the frame 1 such as a building.
[0004]
The shutter case 4 has brackets 6 at both ends, and a support shaft 7 supported by the bracket 6 is provided inside the shutter case 4. A winding wheel 8 is rotatable around the support shaft 7. And an upper end of a shutter curtain 9 is fixed to the winding wheel 8, and the shutter curtain 9 has a seat plate 10 at a lower end. A balance spring 11 is provided between the winding wheel 8 and the support shaft 7. The winding wheel 8 and a mechanism for rotatably supporting the winding wheel 8 constitute a winding section of the shutter curtain 9.
[0005]
The shutter curtain 9 is wound around the winding wheel 8 and housed in the shutter case 4. The shutter curtain 9 is moved up and down along the guide rail 3, and the balance spring 11 is The shutter curtain 9 is urged in the winding direction.
[0006]
A switch 12 is provided on one end side inside the shutter case 4 as shown in FIG. A drive sprocket and a driven sprocket (both not shown) are provided on the output shaft of the switch 12 and the winding wheel 8, respectively. A chain 13 is wound between the drive sprocket and the driven sprocket. The winding wheel 8 is rotated by the opening / closing device 12.
[0007]
The opening and closing of the shutter curtain 9 by winding and unwinding is performed by transmitting the driving force of the switch 12 to the winding unit as a rotational force.
[0008]
The electric shutter may also be manually opened and closed in the event of a power failure or emergency. When the shutter curtain 9 is manually opened and closed, since the switch 12 is connected to the winding wheel 8, the shutter 12 is opened and closed while rotating the switch 12. Requires a considerably larger operating force than the conventional shutter.
[0009]
For this reason, conventionally, there is a device that can release the connection between the switch 12 and the winding wheel 8. For example, in Patent Document 1, an electromagnetic clutch is provided in the switch, and the electromagnetic clutch is used for electric and manual operation. There is one that performs the switching of.
[0010]
[Patent Document 1]
JP-A-7-317471
[Problems to be solved by the invention]
In a conventional electric shutter in which switching between electric and manual operations is performed by an electromagnetic clutch, switching control and the like are required, and the device is complicated.
[0012]
The present invention has been made in view of the above circumstances, and provides an electric shutter that can be opened and closed by a manual operation with a simple mechanism and with a small burden on an opening and closing person.
[0013]
[Means for Solving the Problems]
The present invention relates to an electric shutter having a switch, wherein the switch rotates a winding unit to open and close a shutter curtain, and a one-way transmission clutch is interposed between the switch and the winding unit. The present invention relates to an electric shutter capable of transmitting a rotational force from the switch to the winding unit and blocking a rotational force from the winding unit to the switch.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
1 and 2, the same components as those shown in FIG. 8 are denoted by the same reference numerals.
[0016]
A switch 12 is mounted on the bracket 6 via a mounting seat 14, and a one-way transmission clutch 16 is mounted on the mounting seat 14 coaxially with an output shaft 15 of the switch 12. The output shaft 15 is fitted on the input shaft 17 of the transmission clutch 16, and the driving sprocket 19 is fitted on the output shaft 18 of the transmission clutch 16. A chain 13 is wound around the drive sprocket 19, and transmits a rotational force to the winding unit via the chain 13.
[0017]
The transmission clutch 16 transmits power from the input shaft 17 to the output shaft 18 as shown in FIGS. 3 and 4, but does not transmit power from the output shaft 18 to the input shaft 17. Has a transmission function.
[0018]
This will be specifically described with reference to FIG.
[0019]
In FIG. 4, reference numeral 21 denotes an inner ring, and 23 denotes an outer ring. The inner ring 21 rotates integrally with the input shaft 17, and the outer ring 23 rotates integrally with the output shaft 18.
[0020]
The outer diameter of the inner ring 21 is a regular polygon, and a roller 24 is provided between the inner ring 21 and the outer ring 23. The rollers 24 are arranged on each side of the inner ring 21 and are rotatably held by roller retainers 22. When the roller 24 is located at the center of the side of the inner ring 21, a gap is formed between the roller 24 and the outer ring 23.
[0021]
The roller retainer 22 is provided with a ring spring 26, and spring ends 26 a, 26 a bent at both ends of the ring spring 26 penetrate a notch 27 formed in the roller retainer 22 and are formed in the inner race 21. Into the cutout 25. Thus, the ring spring 26 biases the roller retainer 22 such that the roller 24 is positioned at the center of each side of the inner ring 21 in a state where no external force acts between the inner ring 21 and the outer ring 23. ing.
[0022]
When a rotational force is applied to the outer ring 23, a gap exists between the outer ring 23 and the roller 24, so that the outer ring 23 idles. When a rotational force (clockwise in FIG. 4B) acts on the inner ring 21, the roller 24 is pushed outward in the vicinity of the vertex of the regular polygonal shape. And the inner ring 21 and the outer ring 23 rotate integrally. Similarly, when a counterclockwise rotational force acts on the inner race 21, the rollers 24 are pushed outward, and the inner race 21 and the outer race 23 rotate integrally.
[0023]
Thus, the torque from the input shaft 17 is transmitted from the inner race 21 to the output shaft 18 via the outer race 23, but the torque from the output shaft 18 is not transmitted to the input shaft 17. , Idle.
[0024]
Therefore, the shutter curtain 9 can be electrically opened and closed by the switch 12, and the shutter curtain 9 can be opened and closed manually in either the power supply state to the switch 12 or the power supply stop state. The shutter curtain 9 can be opened and closed with a light operating force without rotating the shutter curtain 9.
[0025]
Next, referring to FIG. 5, a control section of the switchgear 12 will be briefly described.
[0026]
5, 31 is an upper limit switch for detecting the open state of the shutter curtain 9, 32 is a lower limit switch for detecting the closed state of the shutter curtain 9, 33 is the winding wheel 8, or the output shaft 18, etc. An encoder 34 for detecting the rotation angle of the switch indicates a drive control unit for controlling the drive of the switchgear 12.
[0027]
When the shutter curtain 9 is opened and closed by the switchgear 12, the upper limit switch 31 and the lower limit switch 32 transmit a fully open signal and a fully closed signal to the drive control unit 34 when the shutter curtain 9 is fully opened and fully closed. . The drive control unit 34 stops driving the switchgear 12 when signals are transmitted from the upper limit switch 31 and the lower limit switch 32.
[0028]
Also, the encoder 33 detects the rotation angle of the winding wheel 8 or the output shaft 18 or the like, and sends the detection result to the drive control unit 34, so that the drive control unit 34 Detect the actual position.
[0029]
Therefore, even when the shutter curtain 9 is manually opened and closed in a state where power is supplied to the switch 12, the switch 12 is not excessively driven by opening and closing the shutter curtain 9. When the acceleration / deceleration control of the shutter curtain 9 is performed at the time of opening / closing, the actual position of the shutter curtain 9 is detected, so that the deceleration position and the acceleration position can be correctly controlled.
[0030]
Note that one of the upper limit switch 31, the lower limit switch 32, and the encoder 33 can be omitted, and in this case also, the switchgear 12 is properly stopped with the shutter curtain 9 fully opened and closed. Can be.
[0031]
In the above embodiment, the winding wheel 8 is rotated with respect to the support shaft 7, but the winding wheel 8 and the support shaft 7 are integrally rotated. In this case, the switch 12 may rotate the support shaft 7.
[0032]
The transmission clutch 16 described above transmits the torque of the input shaft 17 and the output shaft 18 between the inner ring 21 and the outer ring 23 arranged concentrically and multiplexed as shown in FIG. An input board 36 is provided on the input shaft 17, and an output board 37 is provided on the output shaft 18, and rotational force is transmitted between the input board 36 and the output board 37 disposed on the same axis via a sphere 38. You may do. Although a required number of the spheres 38 are arranged at equal intervals on the circumference, only one is shown in the figure for convenience.
[0033]
The input panel 36 has a recess 39 formed by a slope, and the sphere 38 is provided in the recess 39. The sphere 38 is held by a holder 40, and a spring (not shown) is provided between the holder 40 and the output panel 37, and the sphere 38 is urged to be held at the center of the recess 39. I have. When the spherical body 38 is located at the center of the concave portion 39, a gap is formed between the spherical body 38 and the output panel 37.
[0034]
When the output shaft 18 rotates, the output shaft 18 idles, and when the input shaft 17 rotates, the sphere 38 is pressed against the output board 37 by the recess 39, and the rotational force of the input shaft 17 is reduced. The power is transmitted to the output shaft 18.
[0035]
In the above-described embodiment, the electric shutter in which the shutter curtain 9 is opened and closed up and down is shown. However, it is needless to say that the present invention can be applied to a horizontally-driven electric shutter.
[0036]
In the above-described embodiment, an example was described in which a switch was provided in parallel with the winding unit so as to transmit the rotational driving force via a chain. The present invention can also be applied to a case where a switch is provided in series with the winding unit so as to transmit the driving force, for example, a switch built in the inside of the winding unit.
[0037]
【The invention's effect】
As described above, according to the present invention, in the electric shutter having the opening and closing device, the opening and closing device opens and closes the shutter curtain by rotating the take-up portion, and the one-time operation between the opening and closing device and the take-up portion. A direction transmission clutch is interposed to enable the transmission of the rotational force from the switch to the winding unit and to cut off the rotational force from the winding unit to the switch. An excellent effect that the shutter curtain can be easily opened and closed by a manual operation with a small load and the mechanism is simple is exhibited.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part mode of an embodiment of the present invention.
FIG. 2 is a partially enlarged view showing a main part mode of an embodiment of the present invention.
FIG. 3 is a side view showing a transmission clutch used in the embodiment of the present invention.
4 (A) and 4 (B) are views taken in the direction of arrow A in FIG. 3 showing the operation of the transmission clutch.
FIG. 5 is a block diagram of a control unit according to the embodiment of the present invention.
FIG. 6 is a schematic diagram showing another transmission clutch used in the embodiment of the present invention.
FIG. 7 is a perspective view showing the entire electric shutter.
FIG. 8 is a perspective view showing a conventional electric shutter switch.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 3 Guide rail 4 Shutter case 6 Bracket 7 Support shaft 8 Winding wheel 9 Shutter curtain 12 Switch 16 Transmission clutch 17 Input shaft 18 Output shaft 21 Inner ring 23 Outer ring 24 Roller 26 Ring spring

Claims (1)

In an electric shutter having a switch, the switch rotates a winding unit to open and close a shutter curtain, and a one-way transmission clutch is interposed between the switch and the winding unit. An electric shutter, which is capable of transmitting a rotational force from the coil to the winding unit and blocking a rotational force from the winding unit to the switch.

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