JPS6023584A - Screen winding-up apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

(B) Field of the Invention This invention provides a method for winding up various screens such as curtains, blinds, pumice shutters, and projection screens onto a winding shaft, and by pulling out the screen from the winding shaft. The present invention relates to a screen winding device that accumulates an acting force in a spring that is rotated, and that during winding, the winding shaft is reversed by the acting force accumulated in the spring to wind up the screen. (b) Back of the invention As a means for automatically locking the screen when the screen is pulled out from the winding shaft and released at a desired position, a conventional roll clutch that allows the roll to be dropped into the engagement groove by the own vehicle is used. However, in the case of this roll clutch, the movement of the roll is unstable, so locking and unlocking cannot be achieved reliably, and locking and unlocking operations have to be performed many times. . Also, when the lock is released, the screen is wound up by the acting force accumulated in the spring built into the winding shaft, but when the above-mentioned acting force moves directly, the screen is accelerated as it is wound up. , it will come to a shocking stop at the end of winding, which may damage the screen. (C) Purpose of the Invention This invention provides a lock device for automatically locking the screen. To provide a screen winding device capable of smooth winding by applying an appropriate brake during winding. (D) Summary of the Invention The present invention provides a structure in which a locking roller can be moved in and out in the radial direction between the opposing surfaces of a second key IF rear and a third carrier.
A locking annular body is provided on the outer periphery of the roll holder, and the locking annular body is formed on the inner surface with an engaging portion that engages with a locking roller. 1. Set up an operating ring body to operate the entrance and exit of the camera. The screen is supported on the support shaft in the drawing direction of the screen via a one-sided clutch which is a transmission state part, and this operating annular body and the third
A one-sided clutch that transmits power in the screen winding direction is interposed between the carrier and the lock annular body and a one-sided clutch that transmits power in the screen winding direction. A plurality of magnets are fixed on the circumferential surface that interlocks with the screen winding shaft so that the polarities of adjacent magnets are opposite to each other, and a cylindrical rotating body that rotates relative to each other in the magnetic field of these magnets is provided. The screen winding device is characterized in that it is connected to a third carrier via a one-sided clutch that is in a transmission state when the screen is rotated in the winding direction. (E) Effects of the Invention According to this invention, when the screen is pulled out and released at an arbitrary position, the screen is automatically locked, and the winding blade is locked by pulling the screen once in one direction of the drawer 1. The screen can be unlocked and rolled up, making it extremely easy to lock and unlock the screen. However, the locking roller is forced to be pushed out by the operation annular body and pushed in by the locking annular body, thereby ensuring reliable locking and unlocking operations and providing good operability. Furthermore, since the rotation of the winding shaft is increased by the planetary gear and transmitted to the roll holder, there are fewer return openings for the winding shaft once the screen is locked at the desired position, and when the screen is stopped. The positional shift is extremely small, making it easy to lock the screen at the desired position. Furthermore, when the winding shaft is reversed due to unlocking, the relative rotation between the outer periphery of the magnet and the cylindrical rotor causes the braking action due to the eddy current generated on the surface of the cylindrical rotor to be applied to the third carrier via the one-sided clutch. As a result, a braking action is applied to the winding shaft, and the winding shaft smoothly winds up the screen at a speed set by the number of magnets, reliably preventing accidental breakage of the screen due to sudden winding. Also, by using an eddy current brake, the shaft diameter is smaller than that of a mechanical brake structure, making the entire structure compact and only 1q. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention will be described below with reference to the drawings. The drawings show a roll blind for sun protection and light protection as an example of a screen winding device. In FIGS. 1 and 2, a cylindrical winding shaft 1 has a spring (not shown) on the narrow end is built-in, and a blind 2 is wound around the circumference with one end fixed, and when this blind 2 is pulled out, the acting force is accumulated in the above-mentioned spring, and when the blind 2 is wound up, the force is accumulated. It is wound up by the force of the spring. Note that the mechanism for accumulating the acting force of this spring is well known, so its explanation will be omitted. An inner tube 3 made of a rubber tube and a cylindrical casing 4 made of a resin material are integrally connected and fitted inside the end of the aforementioned winding shaft 1, and furthermore, an inner tube 3 made of a resin material is inserted into the inner tube. The inner tube 3, casing 4, and cylinder shaft 5 interlock with the winding shaft 1 described above. A bearing portion 16 is inserted into the center of the above-mentioned cylindrical shaft 5, and the fixed shaft 7 is inserted through and supported by this bearing member 6. The outer end of the fixed shaft 7 has a hexagonal mounting portion 8;
The mounting portion 8 is inserted into the hexagonal hole 10 of the mounting member 9, and the fixed shaft 7 is prevented from rotating. Note that the member 9 is attached to a fixed wall at the portion where the roll blind is attached. A first carrier 11 is connected to the inner end of the fixed shaft 7, and one end of the support shaft 2 is inserted through the axial center of the carrier 11 and is rotatably supported. Furthermore, a planetary gear 13 is rotatably supported by a shaft 14 connected to the carrier 11 in the first carrier 11,
Internal gear v meshing with this planetary gear 13
-15 is connected to the inner end side of the above-mentioned cylindrical shaft 5, and a sun gear -16 meshing with the planetary gear 13 is connected to the above-mentioned support shaft 1.
2 is rotatably supported on a bearing. A second carrier 17 is provided on the inner end side of the sun gear 16 described above.
A third carrier 18 is provided opposite to this carrier, and a cylindrical roll holder 19 is fixed between these opposing surfaces at a substantially intermediate position in the radial direction. 1 Connect Noah 17 and 18 and attach it to the roll holder 19 mentioned above.

[, O- for locking in three equal positions
The rollers 20 are held so as to be movable in and out in the radial direction. A lock annular body 21 is provided on the outer periphery of the roll holder 19 described above.
is supported so as to be relatively rotatable, and concave engaging portions 22 with which the aforementioned locking roller 20 engages are formed at three equally divided positions on the inner circumferential surface of this lock annular body 21. There is. An operating annular body 23 made of a permanent magnetic material is relatively rotatably positioned on the inner circumferential portion of the roll holder 19, and is pivotally supported on the aforementioned support shaft 12, and is equally divided on the outer circumferential surface. The above-mentioned locking roller 20 is housed in the three positions, and the outer side of this roller 20 forms four parts 24 located inside the outer circumferential surface of the roll holder 19, and the other inner circumferential parts are When the locking roller 20 comes into contact with this, the roll holder 19
A portion of the circumferential surface of the locking roller 20 protrudes from the outer circumferential surface of the locking roller 20 . A one-sided clutch 25 is interposed between the above-mentioned operating annular body 23 and the support shaft 12, and becomes a transmission state when the blind 2 rotates in the drawing direction, and this clutch 24 is constituted by a spring clutch. Also, the shaft portion 26 of the operation annular body 23
A one-sided clutch 28 is interposed between the outer circumferential portion of the blind 2 and the inner circumferential surface of the shaft portion 27 of the third gear rear 18, which changes its transmission state as the blind 2 rotates in the winding direction. A one-way clutch 29 is interposed between the outer peripheral surface of the lock annular body 21 and the cylindrical shaft 5, and the one-way clutch 29 becomes a transmission state when the blind 2 rotates in the winding direction, and this one-way clutch 29 is composed of a spring clutch. As shown in FIG. 3, the spring end 30 on the locking side that is engaged with the cylinder shaft 5 is formed in a U-shape to provide a loose WJ function. A rotation regulating structure 31 is constructed between the aforementioned spindle 12 and the second carrier 17, and this structure includes a regulating plate 33 that is fixed to the spindle 12 and has a bottle 32 protruding toward the carrier 17;
A groove 34 is carved on the side of the carrier 17 and fits into the front bottle 32 to allow relative rotation within a predetermined range. It is set within the rotation range required for release. A small diameter portion 35 is formed on the inner end side of the casing 4, and a casing 36 made of iron material is covered with a predetermined gap therebetween, and this casing 36 is fixed to the casing 36. . And this casing 3
A bearing member 37 is attached to the inside of the inner end of the shaft 6, and the inner end of the support shaft 12 described by Mr+ is supported on this bearing member 37. Balls 38 and 38 are interposed at both ends of the above-mentioned support shaft 12, and a spring 38 is interposed on the fixed shaft 7 side, and this spring 39 depresses the support shaft 12 toward the other side. Resistance is provided to the rotation of the support shaft 12. An even number of permanent magnets 4o are arranged and fixed at equal intervals in the circumferential direction on the outer circumferential surface of the small diameter portion 35 of the casing 4, and the polarities of adjacent magnets 4o are opposite to each other. It is provided. The outer circumferential surfaces and ends of the above-mentioned permanent magnets 40 are covered with a cylindrical rotating body 41 made of aluminum material with a predetermined gap, and the parking end of this cylindrical rotating body 41 is covered with a boss member 42. and is fixed to a cylindrical shaft 43 which is inserted into the above-mentioned support shaft 12 of this boss member 42 in an idling state. The end of the cylindrical shaft 43 in the upper part E is interlocked with the shaft part 27 of the third carrier 18 in the front part E via a one-sided clutch 44 which is brought into a transmission state when the blind 2 is rotated in the winding direction. Mae i! The magnetic field of the permanent magnets 40 of li reaches the casing 36 made of iron material on the outer periphery, and the cylindrical rotating body 41 made of aluminum material mentioned above rotates relatively in this magnetic field, thereby rotating its periphery. An eddy current is generated on the surface, and this eddy current generates a braking action between the cylindrical rotating body 41 and the casing 4 to which the permanent magnets 40 are fixed. This braking action is performed when the one-sided clutch 44 is in the transmission state in the winding direction of the blind 2. The operation of the blind winding device constructed in this way will be explained. For example, as shown in FIG. 2, when the blind 2 is pulled out to a predetermined position while the blind 2 is being wound up on the winding shaft 1, the rotation of the winding shaft 1 due to this pulling out will cause the casing to rotate. 4. Rotate the second carrier 17 via the cylindrical shaft 5, internal gear 15, planetary gear 13, and sun gear 16. Note that the second carrier 17 rotates in a direction opposite to the rotation direction of the winding shaft 1 due to the interposition of the planetary gear 13. Further, since the one-sided clutch 29 between the lock annular body 21 and the cylinder shaft 5 becomes free, the lock annular body 21 is not rotated from the cylinder shaft 5. At the initial stage of drawing out the blind 2 described above, since the one-sided clutch 25 is in the transmission state, the operation annular body 23 that is supported by the support shaft 12 comes to a halt state due to the resistance of the support shaft 12, and as a result, the operation annular body 23 is stopped due to the resistance of the support shaft 12. Annular body 23 and roll holder 19
A relative rotation is about to occur between the two. At this time, when the locking roller 20 is in contact with the inner circumferential surface of the lock annular body 21, the biased state is maintained by the above-mentioned relative rotational force. On the other hand, although the one-sided clutch 29 is free, the lock annular body 21 rotates with a weak rotational force in the opposite direction to the roll holder 19 because the rotation of the cylinder shaft 5 is transmitted due to frictional resistance. When the joining part 22 faces the locking roller 20 of the roll holder 19, the above-mentioned relative rotation between the operating annular body 23 and the O-roll holder 19 is allowed, and the circumferential surface of the operating annular body 23 is aligned with the locking roller 20. By facing each other, the locking roller 20 is pushed out from the roll holder 19, and a part of the circumferential surface of the locking roller 20 is pushed into the engaging portion 22 of the lock annular body 21, so that it can be locked. Note that the lock roller 20 is connected to the engagement portion 2 of the lock annular body 21.
2, the lock annular body 21 rotates together with the roll boulder 19 due to the engagement of the locking roller 20. After the operation annular body 23 performs the lockable state operation as described above, the support shaft 12 is rotated by the rotation restriction 4#& 31, that is, the pin 32 of the restriction plate 33 is moved into the groove of the second carrier 17. 34 and is regulated, the second
The rotational force of the carrier 17 is transmitted to the support shaft 12, and since the one-sided clutch 25 of the operating annular body 23 is in the transmission state, this operating annular body 23 is also rotated, and this operating annular body 23 is connected to the roll holder 19. We will be rotating together. As a result, the rotation of the drawer of the blind 2 is followed while the aforementioned lockable state is maintained. So, Ki 1 of λth? The rear 17, the lever 19, the lock annular body 21, the operation annular body 23, and the support shaft 12 rotate together in the direction in which the blind 2 is pulled out. Note that since the one-way latch 29 of the lock annular body 21 is free with respect to the drawer of the blind 2, the above-mentioned rotation is not obstructed. When the blind 2 is pulled out to a predetermined position and then released, the winding shaft 1 is reversed by the acting force accumulated in the built-in spring, and the lock annular body 21 is further activated by the one-sided clutch 29.
is in a transmission state, so it rotates in the same direction as the winding shaft 1. On the other hand, the second kitria 17 that is interlocked with the sangya 16 rotates in the opposite direction to the winding shaft 1 due to the intervention of the planetary 7'-ft-13, so that the lock annular body 21 and the roll holder 19 are rotated in the opposite direction. As shown in FIG. 4, the 1:1 locking roller 20, which is already in a lockable state due to the rotation in the direction, is bitten by the lock annular body 21 and the roll holder 19, and the relative rotation between the two is locked. do. This lock generates an acting force that causes the planetary gear 13 to revolve in the winding direction, and since this planetary gear +r-13 is supported by the first carrier 11 of the rotating shaft 7,
Revolution is not possible, and as a result, the winding shaft 1 is locked, and the blind 2 is stopped at a slightly wound position due to the pulled out position. Although an impact is generated on the lock annular body 21 when the locking roller 20 is engaged and locked, since the spring end 30 of the one-way clutch 29 is formed in a U-shape,
This portion provides a buffer, and the winding shaft 1 is smoothly stopped. Furthermore, the amount of rotation of the blind 2 in the winding direction when the blind 2 is stopped is such that the sun gear 16 side rotates at an increased speed due to the number of teeth relative to the rotation of the winding shaft 1. The amount of rotation on the winding shaft 1 side decreases. Next, when winding up the above-mentioned blind 2, the blind 2 in the stopped state is pulled out once. In this drawer, one side of the lock annular body 21 is the lock latch 29.
Since it is free, the blind 2 can be drawn out, the cylinder shaft 5 is rotated in the drawing direction, and the second carrier 17 and roll holder 19 are rotated in the opposite direction to the cylinder shaft 5 (or the winding shaft 1). As a result, the locking roller 20 is loosened. On the other hand, since the one-sided clutch 25 is in the transmission state, the operating annular body 23 supported by the support shaft 12 comes to a halt due to the resistance of the supporting shaft 12, and as a result, the operating annular body 23 and the roll holder 19 A relative rotation occurs between the operating annular body 23 and the recessed portion 24 of the operating annular body 23 to face the locking roller 20 of the roll holder 19. Since this sharpening operation annular body 23 is formed of a permanent magnet, the locking roller 20 is sucked into the recess 24, and this roller 20 is housed in the roll holder 19, and the locking annular body 23 is
Unlock 1. In this state, the support shaft 12 rotates together with the second carrier 17 by the rotational lubrication structure 31 in the same manner as described above, so that the unlocked state shown in (a) E is maintained. Then, when the blind 2 that has been pulled out twice is released, the winding shaft 1 is reversely rotated, and the one-way clutch 29 of the lock annular body 21 is activated.
is in a transmission state and rotates the winding shaft 1 together. On the other hand, the second carrier 17 and the roll holder 19 that are interlocked with the sun gear 16 are allowed to rotate relative to the lock annular body 21 because the locking roller 20 is housed in the roll holder 19, and the blind 2 is rotated in the opposite direction from when it is pulled out. Further, since the one-way latch 28 between the third carriers 18 is in a transmission state, the operation annular body 23
The unlock positional relationship between the roll holder 19 and the roll holder 19 is maintained.
That is, when drawing out, the rotation regulating structure 31 maintains the unlocked state, and when winding up, the one-way latch 28 is driven to maintain the unlocked state, and the blind 2 is wound up (the second (see figure). Furthermore, when the winding shaft 1 is reversed for winding, the one-way clutch 44 of the third carrier 18 is in a transmission state, so that the rotation of the sun gear 16 is transmitted to the cylinder via the cylinder shaft 43 and the boss member 42. When the cylindrical rotary body 41 rotates, relative rotation occurs in opposite directions between the circumferential surfaces of the permanent magnets Ao of the casing 36, and eddy currents are generated on the circumferential surface of the cylindrical rotary body 41. , a braking action is applied to the rotation of the phase η, a brake is applied to the rotation of the winding shaft 1 in the winding direction, and the winding shaft 1 is rotated at the winding speed set by the magnet 40... , the blind 2 is wound up. As a result, if you pull out the blind 2 and release it at any position, the blind 2 will be automatically locked, and if you want to wind up the blind 2, pull it once in the direction you want to pull it out and release it, and it will be rolled up. A braking action is applied during removal. In the above-described embodiment, the operating annular body 23 is entirely formed of a permanent magnet, but it may also be constructed by embedding a permanent magnet in the recessed portion 24 of the operating annular body 23. Further, the operating annular body 23 does not necessarily require a permanent magnet; for example, if the locking roller 20 of the roll holder 19 is maintained in the unlocked state facing the recess 24 of the operating annular body 23, the locking annular body 21 is During relative rotation, the locking roller 20 can be stored in the roll holder 19 by the edge of the engaging portion 22, and a storage effect equivalent to that of a magnet can be obtained. Furthermore, although the rotation regulating structure 31 is provided with a bottle 32 on the regulating plate 33, the bottle 32 is directly implanted at the position of the support shaft 12 that overlaps with the second carrier 17, and the bottle 32 is placed on the carrier 17.
It can also be constructed by cutting out a region between which the rotation of the shaft is restricted. Furthermore, although the one-way clutches 25 and 29 are constructed of spring clutches, they may have other constructions. Further, although the above-described embodiments have been described with respect to a roll blind, the present invention can be used in other screen winding devices.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, and FIG. 1 is a cross-sectional side view of a blind winding device. FIG. 2 is a sectional view taken along the line A-A in FIG. 1. Figure 3 is an enlarged plan view of the main parts. FIG. 4 is a sectional view showing the locked state. 20...Lock roller 21...Lock annular body 2
2... Engaging portion 23... Operation annular body 24... Concave
Part 25.28.29.44...One-way clutch 31...
・Rotation regulation structure 39...Spring 40...Permanent magnet 41...Cylindrical rotating body 43...Cylinder shaft

Claims (1)

[Claims] 1. By pulling out the screen wound up on the winding shaft, acting force is accumulated in the built-in spring, and during winding, the winding shaft is rotated by the acting force accumulated in the spring. The screen winding device winds up the screen by moving the screen, and the first carrier is connected to the inner end side of a fixed shaft having a fixed outer end, and a support shaft is provided at the center of the shaft to resist rotation. A planetary gear is pivotally supported on the first carrier, and a cylindrical shaft formed with an internal gear that meshes with the planetary gear is bearing on the fixed shaft, and the cylindrical shaft is supported on the winding. A sun gear connected to the take-up shaft and meshing with the planetary gear is bearing on the support shaft, a second carrier is connected to the inner end of the sun gear, and a third gear is connected to the second carrier. A roll holder that holds a locking roller so as to be able to go in and out in a radial direction is fixed between these opposing rears, and an engaging portion with which the locking roller engages is formed on the outer periphery of the roll holder. A locking annular body is provided on the inner periphery of the roll holder, and an operating annular body is provided on the inner peripheral part of the roll holder to operate the locking roller in and out. A one-sided clutch is pivotally supported via a two-way clutch, and becomes a transmission state when the screen is rotated in the winding direction between the outer circumferential surface of the shaft of the operating annular body and the inner circumferential surface of the shaft of the third carrier. A one-sided clutch is interposed between the outer circumferential surface of the lock annular body and the cylindrical shaft, and the one-sided clutch becomes a transmission state when the screen is rotated in the winding direction, and a one-sided clutch is provided between the support shaft and the second carrier. A rotation restriction structure is provided to allow relative rotation within the rotation range required for locking and unlocking of the operation annular body, and adjacent magnets are arranged on a circumferential surface that interlocks with the winding shaft so that polarities of adjacent magnets are opposite to each other. A plurality of magnets are fixed, and a cylindrical rotating body that rotates relative to each other in a magnetic field is provided on the outer periphery of these magnets, and this is fixed to a cylindrical shaft inserted through the support shaft, and a third A screen winding device in which a one-sided clutch is interposed between the inner circumferential surface of the shaft portion of the carrier and is in a transmission state when the screen rotates in the winding direction.