JP2004124649A - Automatic winding screen device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce resistance at the extension of a screen to the utmost even in the provision of a damper for abating an impact and collision noise at the winding of the screen of an automatic winding screen device. <P>SOLUTION: In this automatic winding screen device, the other end of a coil spring 9 which is fixed to a bracket 13 at one end of a winding box is fixed to a winding shaft 6, and the damper 25 for abating the impact and the collision noise at the winding of the screen 7 is provided. A one-way clutch mechanism 30 is interposed between the winding shaft 6 and the damper 25 to a fixed shaft 16 which is fixed to the winding box. In the mechanism 30, the damper 25 and the winding shaft 6 are disconnected from each other when the winding shaft 6 is rotated in the direction in which the screen 7 is expanded against the rotational urging force of the coil spring 9, and connected to each other when the winding shaft 6 is rotated in a direction in which the screen 7 is rolled around the winding shaft 6. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an automatic winding screen device for dust prevention, light shielding, heat insulation, insect control, and the like. More specifically, the present invention relates to a rotating wind force generated by twisting a coil spring built in a winding shaft to wind a screen. The present invention relates to an automatic winding type screen device provided with a damper for alleviating the impact and collision sound when winding by the coil spring, as a driving device for taking.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a screen device that winds a screen around a winding shaft driven by a coil spring, attaches an operation frame for opening and closing operation to the end of the screen, and automatically winds the screen is widely known. ing.
In this type of automatic winding type screen device, the winding speed is increased when winding is completed because the screen is wound by the rotational biasing force of the coil spring, and the operation frame attached to the end of the screen has a problem. There is a possibility of giving a large impact when colliding with the winding box, or generating a loud collision noise. As a countermeasure against this, consideration has been given to providing a damper for suppressing an increase in the winding speed. (For example, see Patent Document 1).
[0003]
In the damper of this conventional screen device, usually, the rotational force of the winding shaft is always transmitted to the damper irrespective of the rotating direction of the winding shaft, and the one-way clutch mechanism built in the damper causes the screen to be wound on the winding shaft. When the winding is wound, the resistance of the damper is applied to the winding shaft, and when the winding shaft is rotated in the direction in which the screen is stretched by rewinding, the screen can be easily spread without giving the resistance. I have to.
[0004]
However, since the one-way clutch mechanism is incorporated in the damper, even when the winding shaft is rotated in the direction in which the screen is extended, it is unavoidable that a slight resistance acts on the extending operation. In the case of a damper, there is a problem in that the rubber packing that prevents oil leakage in the damper and the shaft that penetrates the rubber packing have a resistance to the friction, which makes the operation for extending the screen somewhat heavy.
Further, since the above-mentioned damper reduces the winding force of the coil spring for winding the screen, for example, when the wind or the like is acting on the screen, the winding force of the screen is provided with a damper. It is significantly lower than in the case where it is not provided, and in some cases, winding becomes difficult.
[0005]
[Patent Document 1]
Japanese Patent Application No. 2001-305371
[0006]
[Problems to be solved by the invention]
A technical object of the present invention is to provide a screen device in which a screen is wound around a winding shaft driven by a coil spring, and the screen is automatically wound. It is an object of the present invention to provide an automatic winding type screen device in which operability is improved by providing as much as possible a resistance at the time of expanding the screen while providing a damper for alleviating the screen.
Another technical problem of the present invention is an automatic winding device in which a damper does not operate until an arbitrarily set deceleration start time, and a winding force of a coil spring for winding a screen is effectively applied. An object of the present invention is to provide a screen type screen device.
Another technical object of the present invention is to provide an automatic winding type screen device in which the deceleration start point can be easily adjusted.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a winding box that rotatably supports the winding shaft, and winds the other end of a coil spring fixedly provided on a bracket at one end of the winding box. Automatic winding provided with a spring receiver fixed to a take-up shaft, and a damper for applying a braking force to the take-up shaft between the take-up shaft and a fixed shaft fixed to a bracket of the take-up box. In the screen device of the type, when the winding shaft is rotated on the fixed shaft in a direction in which the screen is stretched against the rotational urging force of the coil spring, the connection between the damper and the winding shaft is established. When the winding shaft is rotated in the direction in which the screen is wound around, the one-way clutch mechanism that connects the damper and the winding shaft is interposed at least at the latter stage of winding. The one in which the features.
[0008]
In the automatic winding type screen device having the above configuration, a one-way clutch for connecting the damper and the winding shaft when winding the screen between the damper on the fixed shaft fixed to the winding box and the winding shaft. A mechanism is provided to prevent the rotation of the take-up shaft from being transmitted to the damper by the one-way clutch mechanism when the screen is extended, so that when the screen is extended, a resistance force due to friction or the like in the damper may also act. In addition, the resistance at the time of expanding the screen can be reduced as much as possible, and the operation of expanding the screen can be performed more easily than when a one-way clutch mechanism is incorporated in a conventional damper.
[0009]
The one-way clutch mechanism in the automatic winding screen device includes a clutch piece on the damper side connected to a fixed shaft fixed to the winding box via a damper, and an axis that rotates integrally with the winding shaft. Direction, and a clutch piece on the take-up shaft side rotatably fitted to a support shaft provided on the clutch piece on the damper side, and a screen is provided between the two clutch pieces. When the winding shaft is rotated in the extending direction, it does not mesh, but when the winding shaft rotates in the direction in which the screen is wound, meshing clutch teeth are provided, and the clutch piece on the winding shaft is connected to the damper clutch. It is possible to use one provided with an urging means for urging the one piece so that both clutch teeth mesh with each other, and in this case, the one-way clutch mechanism can be simply configured.
[0010]
The one-way clutch mechanism includes a damper-side clutch piece connected via a damper to a fixed shaft fixed to the take-up box, and rotates integrally with the take-up shaft but slides in the axial direction. A take-up shaft-side clutch piece, which is freely movable and connected to a support shaft provided on the damper-side clutch piece via a spiral action mechanism, wherein the spiral action mechanism comprises a take-up shaft-side clutch piece. Is rotated with respect to the support shaft, but when the winding shaft is rotated in the direction in which the screen is extended, the winding shaft is driven in a direction away from the clutch piece on the damper side with the rotation, and the screen is wound. When the take-up shaft rotates, it is configured as a mechanism that is driven in a direction approaching the clutch piece on the damper side, and both clutch pieces are provided with clutch teeth that mesh with each other when they come into contact with each other. It can also be used to.
[0011]
In this case, the braking force by the damper can be applied to the winding shaft at any time, and up to that time, the winding force of the screen by the coil spring can be effectively applied without being reduced by the braking force. it can.
[0012]
As the helical operation mechanism, screws that are screwed to each other provided on both the support shaft on the clutch piece on the damper side and the clutch piece on the winding shaft side can be used, but are not limited thereto. A protrusion such as a screw groove and a pin fitted into the screw groove can also be used.
[0013]
In a preferred embodiment of the present invention, the spiral operation mechanism between the clutch piece on the winding shaft side and the support shaft is provided by connecting the clutch pieces to each other after starting winding of the screen by the winding shaft. Until the start of deceleration at which the damper operates, the clutch piece on the winding shaft side is set to be drivable in the direction approaching the clutch piece on the damper side. When the clutch piece exceeds the operating range of the spiral operating mechanism, the clutch piece on the winding shaft side is provided with an idling area for idling with respect to the support shaft on the spot, and in this case, An urging means for urging the clutch piece on the winding shaft side in the idling region on the support shaft toward the spiral operating mechanism can be provided.
Further, the standing depth of the support shaft with respect to the clutch piece on the damper side can be adjusted, whereby the operation timing of the damper, that is, the deceleration start time of the winding shaft can be adjusted.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a screen device of an automatic winding type according to the present invention will be described in detail with reference to the drawings.
FIGS. 1 and 2 schematically show the overall configuration of a first embodiment of an automatic winding type screen device according to the present invention. Here, the screen can be opened and closed in a horizontal pulling manner. Although the screen device is shown, the screen device of the present invention is not limited to the horizontal drawing type, and can be applied to a case where a screen that opens and closes in a vertical direction is automatically wound up.
In addition, the above-described screen device is shown as being applied to shading, heat insulation, or insect repelling in an opening of a building, but is not limited to those applications, and is used for distributing a front surface of a shelf or a table. It can also be applied to a dust-proof screen device for the opening of a catering car.
[0015]
The screen device shown in FIGS. 1 and 2 includes a screen frame 1 installed at an opening of a building, and one side frame 2 of the screen frame 1 is rotatably wound around a screen 7 around which a screen 7 is wound. It is constituted by a winding box that supports. The screen frame 1 is configured by mutually connecting upper and lower frames 3 and 4 connected to upper and lower ends of the side frame 2 and the other side frame 5 facing the side frame 2. A coil spring 9 is built in a winding shaft 6 in a winding box constituting the winding box 2, and the screen 7 is automatically used as a drive source for winding the winding shaft 6 by a rotational biasing force due to the torsion of the coil spring 9. An operation frame 8 for opening and closing operation is attached to the end of the screen 7, and a latch 10 provided on the operation frame 8 is engaged with the side frame 5 when the screen 7 is stretched. The screen 7 can be held in a stretched state. The upper and lower ends of the screen 7 and the operation frame 8 are guided by the upper and lower frames 3 and 4.
[0016]
The winding shaft 6 is rotatably supported at both ends by upper and lower brackets 12 and 13 at upper and lower ends of the winding box via support members 14 and 15, respectively. Is inserted through a fixed shaft 16, and one end of a coil spring 9 is wound and fixed on a spring receiver 18 fixedly supported on the fixed shaft 16, and the other end of the coil spring 9 is connected to the fixed shaft 16. 16 is fixedly attached to a spring receiver 19 which is rotatable and fixed to the winding shaft 6. Therefore, the winding shaft 6 of the screen 7 is connected to the fixed shaft 16 via the coil spring 9.
[0017]
As shown in detail in FIGS. 3 and 4, an oil damper 25 is provided at the tip of the fixed shaft 16, and a one-way clutch mechanism 30 is provided between the rotation shaft 25 a of the oil damper and the winding shaft 6. Provided.
This one-way clutch mechanism 30 connects the damper 25 and the winding shaft 6 when the winding shaft 6 is rotated in a direction to extend the screen 7 against the rotational urging force of the coil spring 9. When the winding shaft 6 is automatically turned off and rotates in the direction in which the screen 7 is wound by the urging force of the coil spring 9, the connection between the damper 25 and the winding shaft 6 is established. .
[0018]
Specifically, the one-way clutch mechanism 30 rotates integrally with the damper-side clutch piece 31 connected to the rotation shaft 25a and the winding shaft 6, but is slidable in the axial direction, and And a clutch shaft 32 on the winding shaft side rotatably fitted to a support shaft 33 provided on the clutch shaft 31 on the damper side. When the winding shaft 6 is rotated in the direction in which the screen 7 is extended, the two clutch pieces 31 and 32 do not mesh with each other. Meshing clutch teeth 31a and 32a are provided.
[0019]
Further, as a biasing means for biasing the clutch piece 32 on the winding shaft side to the clutch piece 31 on the damper side to such an extent that the two clutch teeth 31a, 32a mesh with each other, a flange 33a at the tip of the support shaft 33 and the clutch are used. A spring 34 is provided between the piece 32. The spring 34 only needs to press the clutch piece 32 to such an extent that it can always contact the clutch piece 31 even when the screen device of FIG. 1 is installed upside down. In the state shown in FIG. 1, if the weight of the clutch piece 32 is sufficient to constantly press it against the clutch piece 31, the spring may be omitted by using it as the urging means.
[0020]
The oil damper 25 is configured such that a connection portion 25b of a casing is connected to the fixed shaft 16, and the rotation shaft 25a is connected to a brake cylinder rotatably housed in the casing via a viscous fluid. Is led out through the cover of the casing, but the invention is not limited to this, and various known structures can be adopted. In the illustrated first embodiment, the fixed shaft 16 is connected to the connecting portion 25b of the casing of the damper 25, and the clutch piece 31 is connected to the rotating shaft 25a of the damper 25, but the connection is reversed. No problem.
[0021]
In the automatic winding screen device having the above configuration, the damper 25 and the winding shaft 6 are wound between the damper 25 on the fixed shaft 16 fixed to the winding box and the winding shaft 6 when the screen 7 is wound. 4, the one-way clutch mechanism 30 prevents the rotation of the winding shaft 6 from being transmitted to the damper 25 when the screen 7 is extended, as shown in FIG. When the one-way clutch mechanism is built in the conventional damper, the resistance at the time of the expansion of the screen 7 is reduced as much as possible without the resistance force caused by the friction in the damper 25 acting at the time of the expanding operation of the damper 25. The operation of expanding the screen can be performed more easily than in the case of.
[0022]
On the other hand, when the screen 7 is wound by the rotational urging force accumulated in the coil spring 9, the one-way clutch mechanism 30 is connected as shown in FIG. 25, the winding shaft 6 is rotated by the urging force of the coil spring 9, but the damping force of the damper 25 suppresses an increase in the rotation speed. Accordingly, it is possible to prevent a large impact when the operation frame 8 collides with the take-up box or to generate a large collision sound.
[0023]
FIGS. 5 to 7 show the operation modes of the main parts of the second embodiment of the present invention. The overall structure of the second embodiment, except for the one-way clutch mechanism, is substantially the same as that of the first embodiment described with reference to FIGS. 1 and 2, so that the following description of the second embodiment will be omitted. The same parts as those of the first embodiment will be described using the reference numerals of the first embodiment attached to the drawings, and the duplicate description thereof will be omitted.
[0024]
The one-way clutch mechanism 40 according to the second embodiment includes a damper-side clutch piece 41 connected to a fixed shaft 16 fixed to the take-up box bracket 13 via a damper 25 in the same manner as in the first embodiment. And a winding shaft which rotates integrally with the winding shaft 6 but is slidable in the axial direction thereof, and which is connected to a supporting shaft 43 provided on the clutch piece 41 on the damper side via a spiral operating mechanism 44. And a clutch piece 42 on the spindle side. The damper 25 itself is as described in the first embodiment.
[0025]
Between the two clutch pieces 41 and 42, mutually meshing clutch teeth 41a and 42a are provided. These clutch teeth 41a, 42a do not mesh when rotating the winding shaft 6 in the direction in which the screen 7 is extended, but mesh when the winding shaft 6 rotates in the direction in which the screen 7 is wound. Although desirable, it is not always necessary to provide such a configuration, and rotation may be transmitted by mutual pressure contact.
[0026]
As shown in the figure, the spiral operation mechanism 44 includes a male screw 45 and a female screw 46 that are screwed to each other and provided on both the support shaft 43 on the clutch piece 41 on the damper side and the clutch piece 42 on the winding shaft. For example, it is also possible to use a threaded groove provided on the support shaft 43 or the clutch piece 42 and a protrusion provided on the other side, such as a pin fitted into the screw groove. In short, when the clutch piece 42 on the winding shaft side rotates with respect to the support shaft 43 and rotates the winding shaft 6 in a direction in which the screen 7 extends, the clutch piece 42 rotates with the rotation of the clutch piece 42. When the winding shaft 6 is driven in a direction away from the clutch piece 41 on the damper side and the winding shaft 6 rotates in a direction for winding the screen 7, the mechanism is driven in a direction approaching the clutch piece 41 on the damper side. I just need.
[0027]
In the spiral operating mechanism 44 between the clutch piece 42 and the support shaft 43 in the illustrated second embodiment, the length of the male screw 45 causes the winding shaft 6 to start winding the screen 7 and then the clutch piece 41, 42, the winding amount of the screen 7 is set until the deceleration start point at which the damper 25 operates, and in the meantime, the winding shaft side clutch piece 42 is driven in a direction approaching the damper side clutch piece 41. (Screw). FIG. 5 shows a state at the time when the winding of the screen 7 is started by the winding shaft 6, and FIG. 6 shows a state in which the damper 25 is operated by the mutual connection of the clutch pieces 41 and 42.
[0028]
When the winding amount of the screen 7 from the start of the deceleration at which the damper 25 operates to the start of the deceleration is set by the length of the male screw 45 in this manner, the damper 25 does not operate from the start of the winding to the start of the deceleration. Even if an external force such as wind acts on the screen, the screen 7 can be wound by utilizing the strong winding force of the coil spring 9 as it is.
[0029]
When the winding shaft 6 rotates in the direction in which the screen extends, as shown in FIG. 7, the clutch piece 42 is screwed in a direction away from the clutch piece 41, so that the connection of the clutch pieces 41 and 42 is performed. Is cut off, the rotation of the winding shaft 6 is not transmitted to the damper 25, and the operation of extending the screen 7 can be performed lightly.
[0030]
When the operation of extending the screen 7 is continued and the clutch piece 42 exceeds the operating range of the spiral operating mechanism 44, that is, the female screw 46 of the clutch piece 42 screwed to the male screw 45 changes the range of the male screw 45. When it exceeds, in order to cause the clutch piece 42 to idle on the support shaft 43 in place, a threadless idle area 47 (see FIG. 6) is provided at the cut end of the male screw 45 on the support shaft 43. . The engraving range of the male screw 45 is a range from when the screen 7 is wound up by the winding shaft 6 from the completely expanded state until the pair of clutch pieces 41 and 42 are joined and the damper 25 starts operating halfway. Needs to be within the range in which the female screw 46 of the clutch piece 42 moves. Also, when the present invention is applied to a screen device having a difference in the length of the screen 7, the difference in the length is absorbed in the idling region 47.
[0031]
As a biasing means for biasing the clutch piece 42 in the idling region 47 on the support shaft 43 toward the male screw 45, a spring 48 is provided between the flange 43 a at the tip of the support shaft 43 and the clutch piece 42. Is provided. The structure and operation of the spring 48 are substantially the same as those of the spring 34 of the first embodiment, and therefore, the description thereof is omitted.
[0032]
A support shaft 43 is provided upright on the clutch piece 41 on the damper side by screw insertion, and the screw insertion position can be fixed by a fastener 49 such as a set screw. The standing depth of the support shaft can be freely adjusted by removing the fasteners 49 and changing the standing depth of the support shaft 43 with respect to the clutch piece 41, whereby the length of the male screw 45 can be adjusted. Is changed, the operation timing of the damper 25 can be adjusted.
[0033]
【The invention's effect】
As described in detail above, according to the automatic winding type screen device of the present invention, a screen device is configured to wind a screen around a winding shaft driven by a coil spring and automatically wind the screen. In, while providing a damper to mitigate the impact and collision sound when winding the screen, operability can be improved by reducing the resistance when the screen is extended as much as possible, The winding force of the coil spring for winding the screen can be effectively applied by preventing the damper from operating until the deceleration start time which can be arbitrarily set.
[Brief description of the drawings]
FIG. 1 is a partially broken front sectional view showing a first embodiment of an automatic winding type screen device according to the present invention.
FIG. 2 is a cross-sectional plan view of the same. FIG. 3 is a cross-sectional view of a winding shaft of the first embodiment in a damper operating state (when the screen is wound).
FIG. 4 is a cross-sectional view of the winding shaft of the first embodiment in a state where the damper is not operated (when the screen is extended).
FIG. 5 is a cross-sectional view of the winding shaft of the second embodiment of the present invention at the time of starting screwing of the winding shaft-side clutch piece (at the time of starting winding of the screen).
FIG. 6 is a sectional view of a winding shaft in a damper operating state of the second embodiment.
FIG. 7 is a sectional view of a winding shaft when the screen of the second embodiment is extended.
[Explanation of symbols]
6 Winding shaft 7 Screen 8 Operation frame 9 Coil spring 12, 13 Bracket 16 Fixed shaft 19 Spring receiver 25 Oil damper 30, 40 One-way clutch mechanism 31, 32, 41, 42 Clutch pieces 33, 43 Support shafts 31a, 32a, 41a, 42a Clutch teeth 44 Helical operation mechanism 45 Male screw 46 Female screw 47 Idling range

Claims (7)

A rotation urging force caused by a torsion of a coil spring built in a winding shaft for winding the screen is used as a driving source for winding the screen, and an operation frame for opening and closing operation is attached to a tip of the screen to open and close the screen. Automatic winding type screen device,
The winding box is rotatably supported by the winding box, and the other end of the coil spring fixed to the bracket at one end of the winding box is attached to a spring receiver fixed to the winding shaft. In a device provided with a damper for applying a braking force to the winding shaft, between the fixed shaft fixed to the bracket of the winding box and the winding shaft,
When the winding shaft is rotated on the fixed shaft in a direction to extend the screen against the rotational urging force of the coil spring, the connection between the damper and the winding shaft is disconnected, and the winding shaft is disconnected. When rotating in the direction to wind the screen, interposed a one-way clutch mechanism that is connected between the damper and the winding shaft at least at the latter stage of winding,
An automatic winding type screen device characterized by the above-mentioned. As a one-way clutch mechanism, a clutch piece on the damper side connected via a damper to a fixed shaft fixed to the winding box, and integrally rotates with the winding shaft, but is slidable in its axial direction, and A clutch member on the winding shaft side rotatably fitted to a support shaft provided on the clutch member on the damper side,
Between the two clutch pieces, when the winding shaft is rotated in the direction in which the screen is extended, it does not mesh, but when the winding shaft rotates in the direction in which the screen is wound, the clutch teeth that mesh with each other are provided,
A biasing means for biasing the clutch piece on the winding shaft side to the extent that both clutch teeth mesh with the clutch piece on the damper side is provided.
The automatic winding type screen device according to claim 1, wherein: As a one-way clutch mechanism, a clutch piece on the damper side connected via a damper to a fixed shaft fixed to the winding box, and integrally rotates with the winding shaft, but is slidable in its axial direction, and A winding shaft-side clutch piece connected to a support shaft provided on the damper-side clutch piece via a spiral operating mechanism,
The spiral operation mechanism is configured such that, while the clutch piece on the winding shaft rotates with respect to the support shaft, when the winding shaft is rotated in a direction in which the screen is extended, the clutch on the damper side is rotated with the rotation. When the take-up shaft rotates in the direction in which the screen is wound, the mechanism is driven in the direction approaching the clutch piece on the damper side,
Both clutch pieces were provided with clutch teeth that meshed with each other when they abutted.
The automatic winding type screen device according to claim 1, wherein: The screw operation mechanism is a mutually screwing screw provided on both the support shaft on the clutch piece on the damper side and the clutch piece on the winding shaft side.
The automatic winding type screen device according to claim 3, wherein: The spiral operating mechanism between the clutch piece on the winding shaft side and the support shaft is driven by the winding mechanism from the start of screen winding by the winding shaft to the deceleration start point at which the damper is operated by the mutual connection of the clutch pieces. The shaft-side clutch piece is set to be drivable in the direction approaching the damper-side clutch piece,
On the support shaft, when the clutch piece on the winding shaft side exceeds the operating range of the spiral operating mechanism when the screen is extended, the clutch piece on the winding shaft side is placed on the support shaft in place. With an idling area for idling,
The automatic winding type screen device according to claim 3 or 4, wherein: Providing biasing means for biasing the clutch piece on the winding shaft side in the idling region on the support shaft toward the spiral operating mechanism,
The automatic winding type screen device according to claim 5, wherein: The standing depth of the support shaft with respect to the clutch piece on the damper side can be adjusted, thereby making it possible to adjust the operation time of the damper.
The automatic winding type screen device according to claim 5 or 6, wherein:

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