JP2004257015A - Rolling screen device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling screen device which enables the manual opening/closing of a screen and enables the screen to be opened by means of a motor. <P>SOLUTION: The screen 3 is wound by means of a winding shaft 1 wherein a turning force in a winding direction is imparted to a coil spring, and both ends of an operating bar 4, which is attached to the leading end of the screen 3, are movably supported by a pair of guides 5, so that the screen 3 can be opened/closed by means of the operating bar 4. A speed-reducing mechanism 14 for making a winding-shaft driving motor 13 run at a reduced speed is provided, and a clutch 15, which is provided between an output part of the mechanism 14 and the winding shaft 1, is put into an on-state so that the winding shaft 1 can be rotated in the winding direction by the motor 13. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a roll screen device in which an opening such as a window is opened and closed by a screen wound around a winding shaft.
[0002]
[Prior art]
A window of a train such as a Shinkansen is usually provided with a roll screen device for awning. As the roll screen device, there has been conventionally known a manual type in which an operation bar is attached to a tip of a sunshade screen wound on a winding shaft, and the screen is opened and closed by raising and lowering the operation bar. I have.
[0003]
[Problems to be solved by the invention]
By the way, in a vehicle such as a bullet train equipped with a manual roll screen device, a screen for awning is often left in a closed state pulled out from a winding shaft, and the screen is closed in a vehicle at the starting station. If left unattended, it will make the customer uncomfortable.
[0004]
Therefore, the railway company returns all roll screen devices to the open state within a relatively short time from arrival at the terminal station to turning around, so that customers can ride comfortably. In this case, the manual roll screen device needs to go into each vehicle and return to the open state, which is very troublesome.
[0005]
There are electric roll screen devices in which the winding shaft is rotated by a motor, but the screen may be manually pulled down without knowing that it is electric. At this time, since the winding shaft and the motor are in a connected state, an extremely large tensile force is applied to the screen, and the screen may be damaged.
[0006]
Further, if a failure occurs in the motor or the electric system or a power failure occurs, the screen cannot be manually opened and closed.
[0007]
An object of the present invention is to provide a roll screen device that can open and close a screen manually and can return a screen to a closed state by a motor.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the present invention, there is provided a cylindrical take-up shaft rotatably supported, a screen wound around the take-up shaft, and an operation bar attached to a distal end thereof; Two parallel guides that guide the movement of both ends of the bar, and twisting deformation caused by rotation of the winding shaft by pulling out the screen, rotate the winding shaft in the winding direction by its resilient elasticity. In a roll screen comprising a coil spring for absorbing slack of a screen, a motor for rotationally driving the winding shaft, a speed reduction mechanism for reducing the rotation of the motor, an output portion of the speed reduction mechanism, and a winding shaft. Thus, a configuration was adopted in which a clutch for transmitting and interrupting rotation between them was provided.
[0009]
With the above configuration, when the operation bar is lowered in a state where the clutch is turned off, the screen is pulled out from the winding shaft, and the opening can be closed by the screen. At this time, the take-up shaft is rotated by drawing the screen, and the coil spring is torsionally deformed by the rotation, and a rotational force in the winding direction is applied to the take-up shaft by the deformation.
[0010]
For this reason, when the operation bar is pulled up and the screen is loosened, the winding shaft rotates in the winding direction to wind up the screen and absorb the slack of the screen.
[0011]
As described above, in the OFF state of the clutch, the screen can be manually opened and closed.
[0012]
On the other hand, when the clutch is turned on and the motor is rotated in the state where the screen is closed, the rotation of the motor is transmitted to the winding shaft via the speed reduction mechanism. Therefore, by rotating the winding shaft in the winding direction by driving the motor, the screen can be wound with the winding shaft.
[0013]
Therefore, by installing a roll screen device on each window of a vehicle such as a Shinkansen and mounting a common start operation switch of a motor in each roll screen device in a driver's cab or a cabin, etc., by operating the above operation switch The screens of the roll screen devices can be returned to the open state all at once.
[0014]
In the roll screen device according to the present invention, by providing a control circuit for stopping the rotation of the motor when an overload is applied to stop the rotation of the winding shaft, it is possible to prevent the motor from burning.
[0015]
As the control circuit, a magnet ring in which magnets are attached at equal intervals and rotates integrally with the winding shaft, a Hall IC opposed to the magnetic ring, and continuously outputs pulses by rotation of the magnetic ring, A one-chip microcomputer having an internal timer circuit which is started by a pulse input from the Hall IC and is turned off when the pulse becomes longer than a predetermined interval, and stops the motor when the internal timer circuit of the one-chip microcomputer is turned off A motor driver IC can be used.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a roll screen device A according to the present invention, and FIG. 2 is a plan view showing the roll screen device A provided inside a glass plate D of a window C in a vehicle B.
[0017]
As shown in FIG. 1, the roll screen device A has a take-up shaft 1, and both ends of the take-up shaft 1 are supported by a pair of opposed brackets 2.
[0018]
A screen 3 is wound outside the winding shaft 1. The screen 3 has a light-shielding property, and a cylindrical operation bar 4 is attached to a tip of the screen 3. The operation bar 4 is supported so as to be able to move up and down by a pair of opposing guides 5 extending long in the vertical direction. Here, as shown in FIG. 2, the guide 5 has a vertically extending guide groove 5a on the opposing surface, and both ends of the operation bar 4 are slidably inserted into the guide groove 5a.
[0019]
As shown in FIG. 1, two wires 6 a and 6 b are inserted into the operation bar 4, and one end of one wire 6 a is pulled upward through one guide 5 and fixed to one bracket 2. The other end is drawn downward into the other guide 5 and is fixed to the lower end of the guide 5. One end of the other wire 6b is pulled downward in one guide 5 and is fixed to the lower end of the guide 5, and the other end is pulled upward in the other guide 5 and the other bracket 2b is pulled out. Fixed to.
[0020]
By stretching the two wires 6a and 6b as described above, the operation bar 4 can be translated in the vertical direction.
[0021]
As shown in FIG. 4, a support shaft 7 is inserted into one end of the winding shaft 1. The support shaft 7 penetrates the end cap 1 a press-fitted into one end of the winding shaft 1, and one end facing the outside is supported by the bracket 2.
[0022]
The support shaft 7 is a non-rotating support, and a coil spring 8 is provided outside a portion located inside the winding shaft 1. One end of the coil spring 8 is fixed to the support shaft 7, and the other end is connected to a disk 9 that is rotatable with respect to the support shaft 7 and is prevented from rotating with respect to the winding shaft 1.
[0023]
For this reason, when the screen 3 is pulled out and the winding shaft 1 rotates, the coil spring 8 is torsionally deformed, and a rotational force in the winding direction is applied to the winding shaft 1 by its resilient elasticity.
[0024]
Here, the rotational force of the coil spring 8 for rotating the winding shaft 1 in the winding direction is substantially equal to the rotational force of the screen 3 and the operation bar 4 for rotating the winding shaft 1 in the rewinding direction. When the screen 3 is loosened by pulling up, the winding shaft 1 rotates in the winding direction by the elastic force of the coil spring 8 to wind the screen 3 and absorb the slack of the screen 3.
[0025]
For this reason, when the operation bar 4 is pulled down or pulled up and the hand is released from the operation bar 4 on the way, the operation bar 4 is held stopped at that position.
[0026]
As shown in FIGS. 5 and 6, a driven shaft 10 is connected to the other end of the winding shaft. The driven shaft 10 includes a first shaft 10a connected to the end cap 1b of the winding shaft 1 and a second shaft 10b connected to the first shaft 10a, and the second shaft 10b includes the bracket 2 and the bracket 2 Through the base plate 11 attached to the outer surface of the motor case 12 and faces the inside of the motor case 12 supported by the base plate 11.
[0027]
Inside the motor case 12, a motor 13 for driving the winding shaft, a gear type reduction mechanism 14 for reducing the rotation of the motor 13, an output gear 14a as an output part of the reduction mechanism 14, and the driven shaft A clutch 15 for transmitting and interrupting rotation between the clutch 15 and the clutch 10 is provided.
[0028]
Here, the output gear 14a of the reduction mechanism 14 and the clutch 15 are provided on a second shaft 10b of the driven shaft 10, as shown in FIG. 7, and the output gear 14a is rotatable with respect to the second shaft 10b. Supported. As shown in the figure, the clutch 15 is composed of an electromagnetic clutch 15, and has a cylindrical rotating shaft 16 that is prevented from rotating around the second shaft 10b, a rotor 17 fixed to the rotating shaft 16, and a And an armature 19 provided at the other axial end of the rotor 17. By energizing the electromagnetic coil 18, the armature 19 is attracted to the rotor 17. The armature 19 is rotated together with the rotation shaft 16.
[0029]
Here, the armature 19 is prevented from rotating with respect to the output gear 14a and is made movable in the axial direction, and the rotating shaft 16 and the output gear 14a are coupled by the armature 19 being attracted to the rotor 17, The rotation of the output gear 14a is transmitted to the rotating shaft 16 and the driven shaft 10 via the armature 19 and the rotor 17.
[0030]
As described above, the electromagnetic clutch 15 couples the output gear 14 a and the driven shaft 10 by energizing (ON) the electromagnetic coil 18, transmits the rotation of the output gear 14 a to the driven shaft 10, and The connection between the output gear 14a and the driven shaft 10 is released by interrupting (OFF) the power supply to the motor, and the transmission of rotation from the output gear 14a to the driven shaft 10 is cut off.
[0031]
As shown in FIGS. 6 and 7, a magnetic ring 20 is attached to the driven shaft 10, and a Hall IC 21 is provided around the outer periphery of the magnetic ring 20.
[0032]
FIG. 8 shows a control circuit for controlling the motor 13. This control circuit is composed of a one-chip microcomputer 22 and a motor driver IC 23, and an interrupt input (INT) of the one-chip microcomputer 22 is connected to a Hall IC 21 facing the magnetic ring 20.
[0033]
In the magnetic ring 20, a plurality of magnets 20b are press-fitted into the ring 20a at equal intervals. When the magnetic ring 20 rotates together with the winding shaft 1, pulses are continuously output to the interrupt input (INT) of the one-chip microcomputer 22. Is to be entered.
[0034]
Therefore, the one-chip microcomputer 22 starts the internal timer circuit with the pulse, the operation bar 4 is gripped when the screen 3 is wound, the rotation of the magnetic ring 20 together with the winding shaft 1 is stopped, and the pulse input is performed at a predetermined interval. As described above, when the internal timer circuit is turned off, the motor driver IC 23 is turned off, and the motor 13 is stopped.
[0035]
The roll screen device shown in the embodiment has the above structure. When the operation bar 4 shown in FIGS. 1 and 4 is pulled down in a state where the clutch 15 shown in FIG. 3, the window C can be closed by the screen 3 thereof.
[0036]
Here, when the screen 3 is extended, the winding shaft 1 is rotated, and the rotation causes the coil spring 8 to be torsionally deformed, and a rotational force in the winding direction is applied to the winding shaft 1 by its resilient elasticity. Since the rotational force of the coil spring 8 for rotating the winding shaft 1 in the winding direction is substantially equal to the rotational force of the screen 3 and the operating bar 4 for rotating the winding shaft 1 in the rewinding direction, the operating bar 4 is lowered. Is held in the position.
[0037]
When the winding shaft 1 rotates, the rotation of the winding shaft 1 is not transmitted to the motor 13 because the clutch 15 is in the OFF state. For this reason, the winding shaft 1 can be smoothly rotated.
[0038]
When the operation bar 4 is pulled up in a state where the screen 3 is pulled out, the screen 3 is loosened, and the winding shaft 1 is rotated in the winding direction by the restoring elasticity of the coil spring 8 to wind the screen 3, and the screen 3 is loosened. Get rid of. When the operation bar 4 is pulled up to the upper limit position, the entire screen 3 is wound up and the window C is opened.
[0039]
As shown in FIG. 1, in a state where the screen 3 is pulled out, when the clutch 15 is turned on and the motor 13 is rotated in the screen winding direction, the rotation is transmitted to the driven shaft 10 via the speed reduction mechanism 14, The winding shaft 1 rotates and the screen 3 is wound.
[0040]
When the operation bar 4 which moves upward by the winding of the screen 3 moves to the upper limit position where it comes into contact with the upper edge of the window C and stops, the rotation of the magnetic ring 20 shown in FIG. When the pulse input to 22 becomes longer than a predetermined interval, the internal timer circuit is turned off, the motor driver IC 23 is turned off, and the motor 13 stops.
[0041]
In the control circuit shown in FIG. 8, when the operation bar 4 moves to the upper limit position, a switch SW operated by the operation bar 4 is provided, and when the switch SW is pressed by the operation bar 4 to be turned ON, The motor 13 may be stopped by turning off the internal timer circuit of the one-chip microcomputer 22.
[0042]
When the screen 3 is wound by driving the motor 13, if the operation bar 4 is erroneously held and the winding shaft 1 stops, the rotation of the magnetic ring 20 also stops, so that the motor 13 stops as described above.
[0043]
As described above, when the rotation of the winding shaft 1 is stopped when a large load is applied when the motor 13 is driven, the motor 13 stops after a predetermined time, so that occurrence of troubles such as burning of the motor 13 is prevented. Can be.
[0044]
As described above, since the winding shaft 1 can be rotated in the winding direction by driving the motor 13, the operation switch for operating the motor can be operated by providing an operation switch for driving the motor in a driver's cab or a conductor compartment. The screen 3 can be returned to the open state, and even if the time required for the vehicle to arrive at the terminal station and be turned around is short, all the roll screen devices mounted on each window of the vehicle are opened at once. State.
[0045]
The operation switch for driving the motor may be provided around each window.
[0046]
Here, when a failure occurs in the motor 13 or the electric system or when a power failure occurs, the electromagnetic clutch 15 is turned off, so that the screen 3 can be manually opened and closed.
[0047]
In the embodiment, the case where the roll screen device according to the present invention is mounted on a window of a vehicle has been described as an example. However, the roll screen device may be mounted on a window of a building, and a usage example is not limited to the illustrated example.
[0048]
【The invention's effect】
As described above, in the present invention, since the screen can be manually opened and closed and the screen can be returned to the closed state by driving the motor, even when the roll screen device is mounted on a large number of windows. It is possible to drive the motors of these roll screen devices by operating one common operation switch, and all the roll screen devices can be simultaneously opened by driving each motor, so that the It is very suitable as a roll screen device.
[0049]
In addition, by providing a clutch between the take-up shaft and the output section of the speed reduction mechanism, the screen can be opened and closed smoothly manually, and the screen can be opened and closed manually even if the motor or the electric system fails. it can.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a roll screen device according to the present invention; FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is an enlarged sectional view showing one end of the winding shaft shown in FIG. 1; FIG. 5 is an enlarged sectional view showing the other end of the winding shaft shown in FIG. 1; FIG. 7 is a cross-sectional view of an electromagnetic clutch. FIG. 8 is a control circuit diagram of a motor.
1 winding shaft 3 screen 4 operation bar 5 guide 8 coil spring 13 motor 14 reduction mechanism 14a output gear (output section)
15 Clutch 20 Magnetic ring 20a Magnet 21 Hall IC
22 One-chip microcomputer 23 Motor driver IC

Claims (3)

A cylindrical take-up shaft rotatably supported, a screen wound around the take-up shaft and having an operation bar attached to the tip, and two parallel guides for guiding the movement of both ends of the operation bar. A roll screen comprising a guide disposed and a coil spring that is torsionally deformed by the rotation of the winding shaft due to the drawing of the screen and that rotates the winding shaft in the winding direction by its restoring elasticity to absorb slack of the screen. A motor for rotationally driving the winding shaft, a speed reduction mechanism for reducing the rotation of the motor, and a clutch for transmitting and interrupting rotation between an output portion of the speed reduction mechanism and the winding shaft. A roll screen device. 2. The roll screen device according to claim 1, further comprising a control circuit that stops rotation of the motor when an overload that stops rotation of the winding shaft is applied. 3. The control circuit includes a magnetic ring in which magnets are attached at equal intervals, the magnetic ring rotates integrally with the winding shaft, a Hall IC that faces the magnetic ring, and continuously outputs a pulse by rotation of the magnetic ring, A one-chip microcomputer having an internal timer circuit that is started by a pulse input from the Hall IC and is turned off when the pulse becomes longer than a predetermined interval, and stops the motor when the internal timer circuit of the one-chip microcomputer is turned off 3. The roll screen device according to claim 2, comprising a motor driver IC for causing the motor to be driven.

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