JP2011206147A - Curtain opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curtain opening/closing device resisting many year use and having a simple and inexpensive configuration.SOLUTION: The curtain opening/closing device 10 includes: a cylindrical shaft 11; thread grooves 12 formed in an outer peripheral part of the shaft 11; an end ring 13a having a thread engagement portion 14 engaged with the thread grooves 12 in an inner peripheral part; and a motor for rotating the shaft 11. The end ring 13a is provided with a ring 15a for holding the upper end part of a curtain 16.

Description

  The present invention relates to a curtain opening / closing device, and more particularly to a curtain opening / closing device capable of easily opening and closing a curtain.

  A conventional curtain opening / closing device is disclosed in, for example, Japanese Patent Application Laid-Open No. 11-113734 (Patent Document 1). FIG. 7 is a diagram showing the curtain opening / closing device disclosed in Patent Document 1. In FIG. 7A is a front view, and FIG. 7B is a cross-sectional view of a portion indicated by arrows BB in FIG. 7A.

  Referring to FIG. 7, the conventional curtain opening / closing device includes a curtain rail 100 having an inverted U-shaped cross section. The curtain rail 100 includes an upper wall 101 and front and rear walls 102a and 102b opposed to the front and rear. A runner travel guide 103 is provided below the front wall 102 a, and a roller 105 connected to the runner 104 travels along the runner travel guide 103. The curtain rail 100 is provided with a plate-like feed shaft 106 in which a plate having a rectangular cross section is twisted in a spiral shape, and the shaft body itself operates as a feed screw. The runner 104 includes a single drive runner 104a driven by a motor 108 via a shaft 106 and a driven runner 104b. The runner 104 has a curtain suspension 107 that suspends a curtain (not shown). A portion of the runner 104 that engages the feed shaft 106 is provided with a rectangular opening that is slightly larger in size than the rectangular shape of the cross section of the feed shaft 106, and the drive runner 104 a is moved by the rotation of the feed shaft 106. The drive runner 104 a is engaged with the feed shaft 106 and the travel guide 103 and can reciprocate along the curtain rail 100. In the conventional curtain opening and closing device, the curtain can be automatically opened and closed by rotating the feed shaft 106 by the motor 108 and driving the drive runner 104a.

Japanese Patent Application Laid-Open No. 11-113734

  The conventional curtain opening / closing device is configured as described above. However, in the conventional curtain opening and closing device, the feed shaft itself for opening and closing the curtain is a screw having a narrow cross section, and is engaged with the opening of the runner. The runner cannot move smoothly due to the rotation of the feed shaft unless the accuracy and the shape of the opening of the runner engaged therewith are accurate. Therefore, there is a problem that it is necessary to prepare the feed shaft with high accuracy and the cost of the curtain opening / closing device is high. There is also a problem that the feed shaft may be deformed over time and the curtain may not be opened and closed smoothly.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a curtain opening / closing device that can withstand long-term use, has a simple configuration, and is inexpensive.

  A curtain opening and closing device according to the present invention includes a cylindrical shaft, a screw portion formed on an outer peripheral portion of the shaft, a screw engaging portion that engages with the screw portion, and a rotary shaft driving means for rotating the shaft. including. The screw engaging portion is provided with a holding portion for holding a part of the curtain.

  The thread portion formed on the outer peripheral portion of the shaft may be a groove formed on the outer peripheral portion of the shaft, or may be a protrusion formed on the outer peripheral portion of the shaft.

  Preferably, the rotating shaft driving means includes an electric motor.

  A threaded portion is formed on the outer peripheral portion of the rotatable cylindrical shaft, a screw engaging portion that engages with the threaded portion is provided, and a part of the curtain is held by the screw engaging portion. The curtain can be moved simply by rotating the. Since the screw portion formed on the outer peripheral portion of the cylindrical shaft is used as the drive portion, the drive portion is not easily deformed as in the prior art. In addition, it is easy to form the screw portion that becomes the drive portion.

  As a result, it is possible to provide a curtain opening / closing device that can withstand long-term use and has a simple configuration and is inexpensive.

It is a schematic diagram for demonstrating the principle of the curtain opening / closing apparatus which concerns on this invention. 1 is a front view of a curtain opening / closing device according to an embodiment of the present invention. It is a partially expanded view of a curtain opening / closing device. It is a block diagram which shows the control part of a curtain opening / closing apparatus. It is a flowchart which shows operation | movement of the control part of a curtain opening / closing apparatus. It is a figure which shows other embodiment of this invention. It is a figure which shows the conventional curtain opening / closing apparatus.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view for explaining the principle of a curtain opening / closing device according to an embodiment of the present invention. Referring to FIG. 1, the curtain opening / closing device 10 includes a cylindrical shaft 11. A thread groove (thread portion) 12 is formed on the outer peripheral portion of the shaft 11. The curtain opening / closing device further includes a curtain ring 13 a having a rectangular plate (screw engaging portion) 14 that engages with the screw groove 12 at its inner diameter portion, and a rotation driving means (not shown) that rotates the shaft 11. The curtain ring 13 a is provided with a ring (holding portion) 15 a for suspending the upper end portion of the curtain 16. The front end of the curtain 16 is supported by a ring 15a provided on the curtain ring 13a. Rings 15 b, 15 c,... Are provided at predetermined intervals on the upper end following the tip of the curtain 16, and these rings 15 b, 15 c,... Are a plurality of curtain rings 13 b supported by the shaft 11. 13c,... In addition, the board 14 engaged with the screw groove 12 is provided only in the curtain ring 13a provided in the front-end | tip part, and the board 14 is not provided in the other curtain ring. That is, only the curtain ring 13a is driven, and the other curtain rings are not driven.

  In FIG. 1, when the shaft 11 is rotated in the direction indicated by the arrow A in the drawing using a rotation driving means (not shown), the plate 14 engaged with the screw groove 12 is moved thereby, and the curtain ring 13a is moved accordingly. The curtain 16 moves in the direction indicated by the arrow B in the drawing according to the rotation direction. Therefore, if the rear end portion (not shown) of the curtain 16 is fixed, the curtain 16 can be opened and closed.

  That is, in this embodiment, the curtain 16 can be opened and closed simply by rotating the shaft 11 in which the thread groove 12 is formed.

  Next, a specific configuration will be described. FIG. 2 is a diagram showing an overall configuration of the curtain opening / closing device 10a using the principle shown in FIG. (A) is a front view, (B) is an arrow view of the part shown by arrow BB in FIG. 2 (A). Here, the curtain opening and closing device 10a is attached to wall mounting brackets 18a and 18b provided on a wall (not shown). Here, the curtain opening and closing device 10a is applied to a single curtain. The curtain (not shown) has a right end in the drawing fixed at a predetermined position, and a left end fixed to a ring 15a provided on a tip ring (corresponding to the curtain ring 13a in FIG. 1) 31a.

  Referring to FIG. 2, curtain opening / closing device 10 a includes a cylindrical rotatable shaft 11 and a rotation driving means 20 for rotating shaft 11. Both end portions 19a and 19b of the shaft 11 are cylindrical with a diameter smaller than that of the shaft 11, and are attached to the wall mounting brackets 18a and 18b by bearings 17a and 17b.

  A thread groove 12 is formed in the outer peripheral member of the shaft 11. A tip guide ring 31 a is provided so as to engage with the thread groove 12. The tip guide ring 31a has a protruding portion that engages with the screw groove 12 on the inner peripheral portion thereof, like the plate 14 shown in FIG. The configuration of this part may be the same as that shown in FIG. Further, guide rings 31b, 31c,... That do not engage with the thread grooves 12 (corresponding to the curtain rings 13b, 13c,... In FIG. 1), and the lower ends of the tip guide ring 31a and other guide rings 31b, 31c,. Are provided with rings 15a, 15b, 15c,... For hanging a curtain (not shown) as in FIG.

  Rotation driving means 20 for rotating the shaft 11 is provided at the right end of the shaft 11 shown in FIG. The rotation drive means 20 is provided coaxially with the motor base 21 for supporting the entire rotation drive means 20, a bearing portion 22 fixed to the motor base 21, a motor 23 supported by the bearing portion 22, and the motor 23. A rotation speed sensor 24 that detects the rotation of the motor 23, and a coupling 25 for connecting the end portion 19 b on one side of the shaft 11 and the motor 23. Here, the motor base 21 is attached to the wall mounting bracket 18b, but may be attached to a wall surface not shown separately.

  A predetermined gap is provided between both ends of the shaft 11 and the wall mounting brackets 18a and 18b so as not to obstruct the rotation of the shaft 11.

  As shown in FIG. 2 (A), when the shaft 11 rotates in the forward direction (right rotation as viewed from the wall mounting bracket 18a), it is guided by the thread groove 12, the tip guide ring 31a moves to the left, and the shaft 11 rotates in the reverse direction. Then, the tip guide ring 31a moves in the right direction.

  Next, the dimensional relationship with the thread groove 12, the tip guide ring 31a, the other guide ring 31b, and the like will be described.

  FIG. 3 is a schematic diagram showing the above relationship. Referring to FIG. 3, the thread groove 12 provided in the shaft 11 has a trapezoidal cross section. When the width dimension of the opening of the screw groove 12 is d1, and the bottom width dimension is d2, d1> d2. The tip guide ring 31a has a shape in which an outer peripheral portion having a rectangular cross section and an inner peripheral portion having a trapezoidal cross section are combined, thereby forming a protruding portion 32 on the inner peripheral portion. In addition, the outer peripheral portion has a constant width dimension d3, and the tip portion of the inner peripheral portion has a protruding portion 32 having a width dimension d4 that is narrower than d3. The dimension d4 is smaller than the groove width dimension d1, and the dimension d3> d1. Therefore, the tip guide ring 31 a is movable along the thread groove 12. The cross-sectional shape of the guide ring 31b is a circle, and its diameter is d5. The diameter d5 is larger than the width dimension d1 of the groove, and it is preferable that d5> d1 × 3.

  The cross section of the protruding portion of the tip guide ring 31a may have an arbitrary shape including a V shape as long as the size of the tip satisfies the above conditions and does not contact the bottom of the screw groove 12. Moreover, the front-end | tip part may have a curvature.

  Next, the rotation driving means 20 will be described. FIG. 4 is a block diagram showing a configuration of a portion that controls the rotation driving means 20. Referring to FIG. 4, the control part of rotation drive means 20 detects motor 23 for rotating shaft 11, rotation speed sensor 24 for detecting the rotation speed of motor 23, and rotation speed sensor 24. A rotation number counter 26 for counting the rotation number pulse signal, a CPU 27 for controlling the rotation of the motor 23, an open / close switch 29 connected to the CPU 27 for opening and closing the curtain, and connected to the CPU 27 to supply power to the CPU and the like. And a power supply unit 28 for supplying power. The open / close switch 29 includes a stop switch for stopping the movement of the curtain. The rotation number counter 26, the CPU 27, the power supply unit 28, and the open / close switch 29 are provided in the control unit 30 not shown in FIG.

  The CPU 27 outputs a stop signal when the number of rotations 26 of the rotation number counter reaches a predetermined set value. The CPU 27 instructs the motor 23 to rotate forward, reverse, and stop according to the open / close switch 29.

  Next, the operation of the control unit 30 will be described. FIG. 5 is a flowchart showing the operation of the CPU 27 of the control unit 30. Referring to FIG. 5, it is determined whether or not the open / close switch is turned on (step S11, hereinafter, steps are omitted). Here, a case where the curtain is closed and the open switch is turned on will be described. When it is determined that the open switch is turned on (YES in S11), the motor 23 is driven in the reverse rotation direction (S12). It is determined whether or not the stop switch has been pressed (S13). When pressed (YES in S13), the drive of the motor 23 is stopped (S15). If not pressed (NO in S13), the motor 23 is driven until the value of the rotation number counter reaches a value determined to be a predetermined “open” (S14, S15). It is basically the same when closing.

  That is, in this embodiment, the number of rotations necessary for opening and closing the curtain is preset and stored in a memory (not shown). Therefore, the user can automatically open and close the curtain only by turning on the opening / closing switch 29. Further, the user can stop the movement of the curtain at his / her favorite position.

  Therefore, a sensor or the like for detecting the position of the curtain necessary for a normal electric curtain opening / closing device is unnecessary and can be manufactured at low cost.

  Here, the curtain opening / closing device has been described with respect to the case where the shaft is rotationally driven by a motor. However, the present invention is not limited to this, and the shaft may be manually rotated. In this case, a string may be fixed to the shaft like a roll curtain, and the shaft may be rotated by pulling it.

  Further, in this embodiment, since it is composed only of a motor and a chip including a CPU for controlling the motor, it can be manufactured at a low cost, and the drive system is simple. If a product tailored to the market is sold, the user can install it individually.

  As described above, according to this embodiment, when the shaft 11 is rotated by the motor 23, even when the curtain, the tip guide ring 31a, the driven guide rings 31b, 31c,. As a result, the shaft 11 and the motor 23 are not overloaded by being lifted from the screw groove 12 provided on the outer periphery of the shaft 11, and can be prevented from being damaged or damaged.

  Next, another embodiment of the present invention will be described. In the above-described embodiment, the curtain opening / closing device applies the curtain to a single-open curtain. In this embodiment, the curtain opening / closing device is applied to a double curtain.

  FIG. 6 is a view corresponding to FIG. 4 showing the overall configuration of the curtain opening / closing device according to this embodiment. Referring to FIG. 6, the basic configuration is the same as that of the curtain opening / closing device shown in FIG. 4, except that screw grooves 12 provided on the shaft are formed in opposite directions at the center of the shaft. Only the difference. Therefore, the same parts are denoted by the same reference numerals, and the description thereof is omitted.

  In this embodiment, screw grooves 12a and 12b provided on the shaft are formed in opposite directions with the central portion as a boundary, and two tip guide rings 31a and 33a opposed at the central portion are respectively connected to the grooves 12a and 12a. By engaging with 12b, it is possible to open and close the curtain suspended by the wheels 15a and 35a provided on the tip guide rings 31a and 33a only by rotating the shaft 11 in one direction.

  In the above embodiment, the case where the shaft is provided with a thread groove has been described. However, the present invention is not limited to this, and a screw-like projection is provided on the outer peripheral surface of the shaft, and a tip guide ring that engages with this projection is provided. May be. In this case, it is good also as a protrusion by attaching the spring engaged with the outer periphery of a cylindrical shaft.

  Further, the opening / closing speed of the curtain can be easily adjusted by changing the pitch of the thread groove using the same motor.

  Moreover, in the said embodiment, although the case where it applied to the curtain of a horizontal opening was demonstrated, you may use for the curtain which opens and closes not only this but an up-down direction.

  Furthermore, you may use for the screen etc. which open and close not only in a curtain but in arbitrary directions.

  Further, a timer may be provided in the control unit of the curtain opening / closing device, and the curtain may be opened / closed at a fixed time every day.

  In addition, a wireless transmission device may be provided in the remote control, a wireless reception device may be provided in the control unit, and an opening / closing signal may be output wirelessly to control the curtain remotely.

  The curtain opening / closing device according to the present invention can be used advantageously as a curtain opening / closing device because it can withstand long-term use and is simple and inexpensive.

  DESCRIPTION OF SYMBOLS 10 Curtain switch, 11 axis | shaft, 12 thread groove, 13 Curtain ring, 14 Plate, 15 wheel, 16 Curtain, 20 Rotation drive means, 23 Motor, 24 Rotation speed sensor, 26 Rotation speed counter, 27 CPU, 29 Open / close switch, 30 control unit, 31 guide ring.

Claims (4)

A cylindrical shaft;
A threaded portion formed on the outer periphery of the shaft;
A screw engaging portion that engages with the screw portion,
The screw engaging portion is provided with a holding portion for holding a part of the curtain,
A curtain opening / closing device comprising: a rotating shaft driving means for rotating the shaft.   The curtain opening / closing device according to claim 1, wherein the thread portion formed on the outer peripheral portion of the shaft is a groove formed on the outer peripheral portion of the shaft.   The curtain opening / closing device according to claim 1, wherein the thread portion formed on the outer peripheral portion of the shaft is a protrusion formed on the outer peripheral portion of the shaft. The curtain opening / closing device according to any one of claims 1 to 3, wherein the rotating shaft driving means includes a motor.

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