JPS5883782A - Roll screen 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 The present invention relates to a roll screen device, in which curtains, blinds, shutters (lightweight shutters), projection screens, and other screens can be rolled up and stored using the elastic force of inner layered coil springs. Figure 1 shows how to ensure reliable stopping when pulling out and quick storage when winding up.
In particular, we aim to make the parts used for assembly more versatile, expand the selection range of usable parts, and support coil springs with different helical directions in order to enable assembly, installation, and use according to the conditions at the installation site. The present invention relates to an improvement of a roll screen device equipped with reverse rotation stopping means that can select between right rotation locking and left rotation locking.

Conventionally, the reverse rotation stopping means in this type of roll screen device @ when the screen is pulled out, applies a resilient force to the screws to the built-in coil spring as the screen is pulled out, and this is used to lock the ratchet pawl. The coil spring is stopped with an accumulated repulsive force due to the impact of a rolling element such as a ball, and when winding is low, the screen is pulled out slightly to release the lock and impact, and the coil spring itself 1, which is installed in either end of the winding cylinder. Therefore, since the application of repulsive force, engagement, or impact on the coil spring is always set in a fixed direction, the helical shape of the coil spring used depends on the situation at the installation site and other factors. If the direction is specified as either right or butterfly left and you have no choice but to select it, it is completely impossible to rearrange the rotation locking direction using the reverse rotation stop means itself prepared in advance. , had to replace the whole thing.

Therefore, the present invention was created in view of the above points, and includes a stator that is fixed during winding and forward and reverse rotation of the cylinder, and a rotary rotor that is rotatably fitted to the stator. Even if a rolling element such as a ball is pushed against the winding direction by the engagement groove provided on the outer peripheral surface of the former and the floating groove provided on the inner peripheral surface of the latter, the winding direction is Right rotation,
For either counterclockwise rotation, separate floating grooves are formed and arranged in the corresponding direction, and rolling elements are selectively loaded into the free groove in either direction depending on the situation at the installation site. By incorporating the coil spring, it is possible to assemble, install, and use the coil spring by rearranging it, regardless of the spiral direction of the coil spring, and has succeeded in increasing installation flexibility.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Reference numeral 1 shown in the figure denotes a pair of bracket members B1 and B2 which are fixed to the ceiling or wall at predetermined intervals and are rotatably supported between them.A screen S, etc. is wound around the bracket members B1 and B2 so that they can be freely drawn out. It is fixed to one bracket member B1 by a stator 20 which is a winding cylinder and is rotatably fitted and inserted into a low cheater 30 fitted to one end of the winding cylinder 1, and is fitted to the other end. Nine roller end 2 pivot pins 2
At A, the other plaque is rotatably supported by the mat member B2.

These 3.
A coil spring 10 made of a steel wire with a substantially rectangular cross section is wrapped around the inner core spring 10 made of plastic or the like and is mounted between the ends of the coil spring 10, which is made of steel wire and has a substantially rectangular cross section. The coil 2 (needle 10) is stopped as the screen S is pulled out, the screws are accumulated, and the screen S is wound up by its release and restoration. It is something.

The locking means for the coil spring 10 shown in the figure is formed by bending bent engagement ends 11 electrically installed in the direction of the center of the coil shaft at both ends of the coil spring 10, and on the other hand, the stator 20,
A connecting groove 15t having a substantially rectangular cross section is formed at the free end of the pillow 3, and this connecting groove 1s communicates with the outside at the axial end face of the stator 20 and the pillow 3, and is a guide communication along the axial direction. It includes a portion 15A and a retaining portion 15C that is continuous with the guiding and communicating portion 15AK via the circumferential guide portion 15Bt that extends in the circumferential direction, and that extends along the axial direction without communicating with the axial end surface. After that, the bent engagement end 11 is sequentially slidably guided by the guide communication part 15A, the circumferential guide part 15B, and the engagement part 15C, and then brought into contact with the end surface of the engagement part 15C, thereby tightening the coil spring 10. (See Figures 8 and 9). By doing so, it is possible to very easily lock and release the coil spring 10 and the stator 20 or the pillow 3, and the disassembly when selectively loading the rolling elements 40 into the floating grooves 38 and 39 in the low cheater 30. It facilitates assembly and provides ease of handling. The connecting groove 15 itself has a generally E-shaped overall planar shape so as to be suitable for use with coil springs 10 having different helical directions depending on the installation situation of the roll screen device according to the present invention and other traps.

The insertion and fitting groove structure between the rotor cheater 30 and the stator 20 is fitted into the fixing hole of the bracket member B1 so that the winding tube 1 is firmly fixed without free rotation when the winding tube 1 rotates in forward and reverse directions. A shaft-shaped 0゛cheetah 20 to which a metal fixing pin 22 with a substantially rectangular cross section is attached is rolled up and rolled!
When assembled, a cylindrical rotator 30 is removably fitted onto the outer circumferential surface of the former 20, with nine engaging grooves 28 and floating grooves 38 and 39 provided on the inner circumferential surface of the latter. The parts are arranged so that they face each other at a fixed position and can be assembled and disassembled freely.

For example, as shown in FIG. A flange-shaped cover plate 23t with a non-slip outer periphery is provided at the end of the cover, and the cover plate 23 of the stator shaft 21 is attached to the cover plate 23t.
An engagement groove 2B'? :
A stopper 21 is recessed and elastically protrudes from the other end of the stator shaft 21, and the connection groove 15t, which connects the coil spring 10, communicates with the other end of the stator shaft 21.
A fitting pin 26' is cut into the surface, and the axis thereof is aligned with the inner core bushing 4, and the fitting pin 26' is fitted rotatably with an inner core bushing 5 interposed therebetween as the case may be.
F Nicheeter shaft 21 is aligned with the axial center of the stator shaft 21 and protrudes from the loose end of the stator shaft 21, and the rotary 7 lange 27At, which has a diameter slightly larger than the diameter of the stepped shaft portion 24, is provided at the end of the single stepped shaft portion 24. There are nine rotating 7 langes with a slightly larger diameter, each bulging in the middle of the 27Bt stator shaft 21.

On the other hand, the low cheater 30 that is rotatably fitted onto the stator 20 has a rotary contact end surface aII that is connected to the inner surface of the cover plate 23, and a stepped inner circumferential surface that penetrates the outer circumference 1iK of the stepped shaft portion 24. part 31t - one end is raised and this loading part 31
On the inner circumferential surface, there is a floating recess @ 38, 391 that intermittently matches the retaining groove 28 as the low cheater 30 rotates itself, and a winding cylinder 1t is fitted and fixed. A fitting groove 32t- provided with a locking surface for locking the end of the first opening.
The other end is cut into the outer circumferential surface in communication with the other end, and the other end is used as a retaining end surface 33 that engages with the stopper 25. Furthermore, a fitting portion 34 that is fitted and connected to the end of the outer core 6 is provided at the other end. In preparation for this, a rotary stepped portion 35t which is slidably fitted onto the rotary 7 flange 27A and the inner circumferential surface of the loading section 31 is formed continuously, and a rotary end 36 which is slidably fitted onto the rotary 7 flange 27BK is formed on the cylinder inner circumferential surface. It is a thing of formation and mourning.

And between the stator 20 and the low cheetah 30,
The method of rolling the low cheater 30 to prevent the reverse rotation of the low cheater 30 when stopping after pulling out the screen S, to allow the reverse rotation of the low cheater 30 during winding, and to enable it to rotate either left or right. The floating grooves 38 and 39 recessed in the inner peripheral surface and the retaining groove 28 recessed in the outer peripheral surface of the stator shaft 21 of the stator 20 are intermittently brought into opposition with each other as the low cheater 30 rotates. A circular plate-shaped or ball-shaped rolling element 40 made of, for example, a steel ball is loaded into the floating grooves 38 and 39 so as to be able to be moved freely into the engagement groove 28,
The retaining groove 28 has an engaging surface 28At having approximately the same curvature as the curvature of the rolling element 40, while the floating grooves 38 and 39 are fitted together with the engaging surface 28A so as to balance against the rolling element 40'tIIk* direction. , retraction arc surfaces 38B and 39B located on the outer side of the meshing arcuate surfaces 3gA and 39A and having substantially the same curvature as the curvature of the rolling element 40, and the meshing arcuate surface 38
A, 39A, retraction arc surfaces 38B, 39Bt are symmetrically reversed and arranged for clockwise rotation locking and counterclockwise rotation locking, and the rolling element 40t is retracted by the centrifugal force that is applied when the low cheater rotates 30 times. Arc surface 38Jl.

39B so that it can freely rotate while slidingly contacting it.

That is, the floating grooves 38 and 39 provide the loading portion 31 of the low cheater 30 with an engaging circular arc surface 3 extending from the inner circumferential surface of the cylinder hole toward the cylinder wall.
Surrounded by 8A, 39A edges, retreat arc surfaces 38B, 39B edges,
The depth of the notch is cut to the outer end surface and the inner circumferential surface, and as shown in Figs. If necessary, the 6th
As shown in the figure, there are 3 locations for locking rotation in each direction, for a total of 6 locations, and as shown in FIG. A plurality of locations are provided at equal intervals in the circumferential direction for clockwise rotation locking and counterclockwise rotation locking.Here, the floating grooves 38 for clockwise rotation locking are provided when the roll screen device itself is installed. When the reverse rotation prevention means is installed on the left side when viewed from the front, the coil spring 10 used has a right-handed spiral direction as shown in FIG. (See Figs. 1 to 3 and 6), and the floating groove 39 for locking left rotation is also used when the coil spring 10 is in the left helical direction as shown in Fig. 9. It is used when trying to prevent and stop reverse rotation (see Figures 4, 5, and 7), and in any case,
A floating groove 38 for locking clockwise rotation and a floating groove 39 for locking left rotation.
It has a symmetrical inverted shape in the left and right direction. Furthermore, the second
The arrows in the figures through FIG. 7 indicate the rotatable direction of the low cheater 30 in the illustrated position.

In order to ensure stability so that even a slight external impact does not dislodge when the rolling element 40 is pushed into the rolling element 40, the engaging surface 28A and the engaging arcs 1138A and 39A are both designed to have a diameter that substantially matches the diameter of the rolling element 40. It is formed into a curvature to increase its adhesion, and the diameter line of the rolling element 40 passes through the starting part 28B1 which is the starting end of the engaging surface 28A when it is pushed in, that is, the intersection with the outer circumferential surface of the stator 20. However, the starting ends of the meshing arc surfaces 38A and 39A, that is, the low cheater 3
0 The inner part is straight from the intersection with the inner circumferential surface, and the meshing arc f
The diameter line of the rolling element 40 passing through the starting ends of f138A and 39A passes through the outside of the stator shaft 21 from the starting end of the meshing surface 28A.

The release of the rolling element 40, which has once anticipated a collision, is performed by the low cheater 30.
′? : Slightly rotate in the pull-out direction, and the ends of the retreating arcuate surfaces 38B, 39B on the opposite side of the starting ends of the engaging arcuate surfaces 38A, 39A in the floating groove 38° 39, that is, the low cheater 30
This is done by pushing the rolling element 40 out of the engagement surface 28 at the tip of the intersection with the inner circumferential surface and out of the retaining #128.

During rolling of the row carter 30, the rolling elements 40 freely rotate within the idler grooves 38, 39 while being in sliding contact with the retreating circular arc surfaces 38B, 39B due to the applied centrifugal force. The radius of curvature of the surfaces 38B and 39B is larger than that of the rolling element 40. Retraction arc 1r 38B, 39Ba Engagement arc f [Even though they are continuous with 38A and 39A, both 38A and 38B
, 39A.

39Bt - The continuous portion between them to be partitioned forms acute-angled tip portions 380 and 39C. In addition, the retreat arc surface 3
The ends of 8B and 39B are designed to eject the rolling element 40 as described above, and also to smoothly guide the rolling element 40 to fall into the engaging groove 28 after the rotation of the low cheater 30 is stopped. Therefore, the angle formed between the ends of the retreating circular arc surfaces 38B and 39B and the inner circumferential surface of the low cheater 30 is smaller than a right angle.

Also, the rolling element 40 when the low cheater 30 makes one rotation
The number of potential positions can be freely selected.

That is, a large number of floating grooves 38 for clockwise rotation locking and a large number of floating grooves 39 for counterclockwise rotation locking, into which the rolling elements 40 can be loaded, are formed, and the stator 20. When assembling both low cheaters 30, it is only necessary to load rolling elements 40 that correspond to the desired number of stopping positions, and furthermore, by changing the number of loading positions, the drawing stop length of the screen S can be adjusted. It becomes easy to adjust and change the interval.

At this time, as shown in FIGS. 2 to 7, the rolling elements 4
By recessing the preliminary loading hole 31 which is not smaller than the zero diameter, the number of stopping positions is smaller than the number of each of the floating grooves 38 and 39. Once installed, changes in the number of stopping positions can be quickly dealt with.

On the other hand, it is sufficient that the engagement groove 28Fi is recessed at least at one place on the outer surface of the stator shaft 21 of the stator 20, in the illustrated case, the outer surface of the stepped shaft portion 24. Since there is a regularity in the supporting direction of the fixing bin 22 when fixing it, it is extremely preferable to take this into account and provide a plurality of recesses so as to be able to support any direction.

Here, when fixing the stator 20, the position of the retaining groove 28 is also determined at the same time, and in this case, the position of the locking groove 38.3 is determined at the same time.
! The reliability of pushing the rolling element 40 in cooperation with I and the smoothness of releasing the rolling element 40 must also be considered at the same time.

The rounded engagement groove 28 is set at a position rotationally phased by approximately 45 degrees along the pull-out rotation direction with respect to the direction of gravity.

However, in this case, when locking the clockwise rotation or locking the counterclockwise rotation, the pull-out direction is reversed, so FIGS. 1 to 3,
As shown in FIG. 6, the engagement groove 28 for clockwise rotation locking is located at a position suitable for impacting the rolling element 40 by cooperating with the free groove 28 for clockwise rotation locking, and the fourth As shown in FIGS. 5 and 7, the engagement for left rotation locking is performed at a position suitable for pushing the rolling element 40 in cooperation with the free groove 39' for left rotation locking. Both grooves 28 are recessed. That is, as shown in the figure, the rotational phase is approximately 45 degrees along the direction of rotation of the drawer with respect to the direction of gravity, and they are located on the diameter line of the cross section of the stator 20, and the fixed bins are attached to the stator 20. 22t - The cross section is approximately square, and the fixing pin 22't is installed with a rotation phase of 90 degrees to correspond to the different helical direction of the coil spring 10 used internally, so that it locks clockwise rotation and counterclockwise rotation. Either locking can be used under exactly the same conditions. In that case, which engagement groove 2 is on the surface of the cover plate 23 of the stator 20?
It is extremely preferable to attach a mark indicating whether 8 is in the upper direction.

Originally, when the stator 20 is fixed, the retaining groove 2
Position 8 must always be located upward, and the arrangement structure shown in the illustration and in the above description is convenient because it can be used regardless of the vertical direction. Ninth, although not shown in the drawings, in order to quickly release the impact surface of the rolling elements 40, a release guide surface is formed so as to be continuous with the engagement surface 28A and gradually become shallower toward the drawing direction. The engagement groove 28 itself can be formed into a round shape by being sandwiched in a substantially J-shape in the cross section of the stepped shaft portion 24, and in that case, it is necessary to specify the vertical direction and install it.

In addition, in the illustrated example, the floating grooves 38, 39 and the engaging grooves 28 are provided with inclined surfaces that are parallel to each other. Therefore, regardless of whether the winding tube 1 is installed horizontally or vertically, or at any installation space angle, it will not move on an inclined surface and follow the centripetal tendency. The rolling element 40 that is pushed down falls into the engagement groove 28, and as a result, the floating groove 38,
3g, the rotation of the four-cheater 30 can be stopped by being inserted into the engagement grooves 28 (the first
(see figure).

In addition, the inner core pipe 4ti, the stator 20
, the inner core pipe 4ti is rotatably mounted between the pillows 3, and prevents the coil spring 10 from excessively tightening and meandering, and also allows one rotation. The winding tube is effective in making it easy to rotate in the direction in which force is applied even if it makes contact, releasing elastic restoring energy, and preventing the generation of vibration and noise when the screen is removed. 1 can be rotated extremely smoothly.

In addition, the outer core 6 is made of plastic, and is fitted with a low cheater 30, a pillow 3, and a coil spring 101C.
Between Kl! ! By wearing the coil spring 10, the coil spring 10 can be protected and sound insulation can be achieved.

The stator 20 and the low cheater 30 are arranged so that they can be disassembled and assembled freely.This is because the central axis of the stator shaft 21 in the stator 20 elastically protrudes and retracts into the recessed space. Stopper 25
It will be held at That is, it is only necessary to push the stator 20 while fitting the loading part 31 of the low cheater 30 to the end of the stator 20, and the stopper 25 after pushing returns to its original state with its own elastic force, and the engagement surface becomes the engagement end surface 33. By being in contact with @, the removal of the low cheater 30 is prevented and the stator 2
0 and is securely fitted in the correct position in a rotatable state. Of course, the means for assembling both 20 and 30 is not limited to the illustrated example;
Other modifications to the structure are possible, such as forming a stopper on the stator 20 and engaging it in a recess formed in the stator shaft 21 of the stator 20. In this way, both the stator 20 and the low cheater 30 can be disassembled and reassembled, thereby sufficiently satisfying the responsiveness.

The present invention has the above configuration, and if the helical direction of the coil spring 10 selected according to the situation at the installation site is right and the coil spring 10 is to be stopped when rotating clockwise, the coil spring 10 shown in FIGS. As shown in Fig. 6, in the 10-tater 30, the rolling element a'ott is placed in the free groove 38 for locking clockwise rotation. 4
As shown in the figure and FIGS. 5 and 7, the low cheetah 30
In this case, the rolling element 4o is placed in the floating groove 39 for locking the left rotation.
Load each. Lowchie p-s like this
The o and x cheaters 20 are assembled and installed, and the rolling element 40 is released from the impact hole between the idle grooves 38 and 39 on the inner circumferential surface of the low cheater 30 and the engagement grooves 28 on the outer circumferential surface of the stator 20. By doing so, it is possible to realize a stop by reliably preventing reverse rotation after the screen S is pulled out, and smooth rotation by centrifugal retraction of the rolling elements 40 when the fleece S is unwound. Moreover, the floating grooves 38 and 39 arranged for right rotation locking and left rotation locking have their meshing circular arc surfaces 38A and 39A, and a retracting circular arc [38B].

39B are formed in oppositely symmetrical directions, so that they function in exactly the same way regardless of whether the coil spring 10 is selected and set in advance for clockwise rotation locking or counterclockwise rotation locking.

That is, one end of the bellows 3, which rotates as a result of the roll stack 1 being rotated by pulling out the screen S, is attached to the stator 20.
A torsional elastic force is applied to the coil spring 10 whose other end is fixed at each end. At this time, the low cheater 30 is rotated at the stator shaft 21 position, but the screen S is not pulled out at an appropriate speed due to the centrifugal action of the rolling elements 40t-1 loaded in the idler grooves 38 and 39. If the rolling element 40 is retracted to the surfaces 38B and 39B or falls into the engaging groove 28, the ends of the retracted arcuate surfaces 38B and 39B will scoop up the rolling element 40 and take it out.
rotates smoothly (see Figures 3 and 5).

After pulling out the screen S=2 to a predetermined length in this way, if necessary, while drying it back, connect the meshing arc surfaces 38A and 39AK.
The rolling elements 40 are made to collide with both the engaging surfaces 28A7, and as the rolling elements 40 are expected to collide, the winding direction of the screen S is caused by the restoring action of the coil spring 10, which has accumulated threads. To prevent reverse rotation of a low cheater 30. At this time, the rolling element 40 is inserted into the floating groove 3 for locking clockwise rotation.
8, it will prevent clockwise rotation (see Figure 2),
Similarly, if it is loaded in the counterclockwise rotation stopper 39, counterclockwise rotation will be prevented (see FIG. 4).

Next, due to the rotation of the low cheater 30 as the screen St is slightly pulled out, the retracting arcuate surfaces 38B and 39B scoop up the rolling element 40t to release the impact field, and when the screen S is released, the restoring action of the coil spring 10 If the trap is accelerated and reaches a certain speed or higher, the released state is maintained, so the screen Su is automatically wound up.
At that time, the rolling elements 40 are moved to the retracted arcuate surface 38 by centrifugal action.
Since it is evacuated to B and 39B, the smooth winding of screen S is not impaired (see Figures 3 and 5).
.

Also, when preventing the rotation of the winding tube 1, the engaging surface 28A of the engaging groove 28 and the engaging circular arc surfaces 38A, 39A of the floating grooves 3B, 39
The rolling element 40 can be inserted between the mating surface 28A1 and the mating arc surface 38 in a completely tightly meshed state.
Since each of A and 39A has a curvature that is approximately the same as the curvature of the rolling element 400, surface contact occurs over the entire circumference of the rolling element 40, which is effective in dispersing stress. Not only that, but the rolling elements 41 arc-shaped meshing surfaces 28A1 meshing arcuate surfaces 38A, 3
The impact at 9A is large against external shocks and vibrations, that is, those in the winding direction, and in the unwinding direction, the rolling elements 40 may not be completely scooped up, and may inadvertently damage the rolling elements. There is absolutely no chance that 40 will be released.

At that time, the meshing arc surfaces 38A, 39A and the retreating arc surface 38B
, 39B, both 38A
, 38B, 39A, and 39B, and when stopping the rolling element 40, the engaging circular arc surface 38A,
39A* is guided to either of the retreat arcuate surfaces 38B and 39B to prevent the rolling elements 40 from being uncertainly balanced, thereby further improving the reliability of the stopping operation.

The floating grooves 38, 39 into which the rolling elements 40 are loaded are connected to the meshing arcuate surfaces 38A, 3! Retreat arc surface 3 located on the outside of the IA
8B, 39Bt-, and the rolling elements 40 are freely rotated while being in sliding contact with the retreat arcs ff138B, -39B by the centrifugal force that is applied when the low cheater 30 itself rotates, so the low cheater 30 is reversely rotated. During rotation, the rolling element 40 does not engage with the engagement groove 28 at all, and there is no possibility of collision.
This facilitates reverse rotation, which is the winding direction. At this time, each arcuate surface 38A, 39A, 38B, 39B is connected to the engagement groove 28t.
- By adjusting the angle formed with the included circumferential surface, that is, the tangential angle, it is also possible to determine the impact probability on the rolling element 40, release conditions, and performance.

As explained above, according to the present invention, regardless of whether the helical direction of the coil spring that is selected and used is left or right depending on the situation of the installation location, a reverse rotation stopping means that is a combination corresponding to the spiral direction is incorporated. Moreover, whether it is clockwise rotation locking or counterclockwise rotation locking, it functions exactly the same and there is no damage, and in some cases, the installation position of the reverse rotation stop means can be adjusted at the installation site. It is possible to assemble, install, and use the left and right reversed arrangement when viewed from the front, which not only increases the flexibility of installation, but also ensures reliable stopping when pulling out and quick storage when winding up. This has the advantage of eliminating stress concentration and increasing durability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway front view of the state in use, and FIGS. 2 to 7 are sectional views taken along the line ■-■ in FIG. 1, and FIGS. Figures 4 and 5 show a built-in right-handed helical coil spring to lock clockwise rotation, Figures 4 and 5 show a built-in left-handed coil spring to lock left-handed rotation, and Figures 6 and 7 show stoppage. Figures 8 and 9 represent the case where the number of positions is increased, and Figures 8 and 9 are plan views of the internal mechanism representing the collection of coil springs. Figure 8 represents the case of right-hand spiral, and Figure 9 represents the case of left-hand spiral, respectively. It is something. S... Screen Bl, Bl... Bracket member 1... Winding tube 2... Roller end 2A
... Pivot pin 3 ... Pillow 4 ... Inner core pipe 5 ... Inner core bush 6
°...Outer core 10...Coil spring 11
°°. Bent engagement end 15...Connection groove 15A...Guide communication portion 15B...Circumferential guide portion 15C...
・Engagement part 20...Stator-21...Stator shaft 22...Fixed bin 23...
Lid plate 24...Stepped shaft portion 25...Stopper
26...Mating pin/27A, 27B...Rotation 7
Lunge 28... Engagement groove 28A... Engagement surface 2
11B... Starting end 30... Low cheetah 3
1... Loading part 32... Fitting groove 33... Engagement end surface 34... Fitting part 35... Routing step part 3
6... Rotating end 31... Pre-loading hole 38.3
9...Floating groove 38A. 39A... Engaging arc surface 38B, 39B... Retraction arc fl 38C, 39C/94 section 40...
rolling element

Claims (1)

[Claims] 1. A screen winding cylinder is rotatably supported between a pair of bracket members, and built into the winding cylinder, a nine-coil spring is applied with twisting as the screen is pulled out, and is then stopped: 'Release it. Restoration - In a nine-roll screen device that allows the screen to be wound up, there is a floating groove that fits into one end of the winding cylinder and is recessed in the inner peripheral surface of the nine-row cheater, and a stator that is fixed to one bracket member. The engagement groove recessed on the outer circumferential surface of the stator shaft shall be intermittently mated with the engagement groove as the rotor shaft rotates, and there shall be no possibility that the stator shaft may fall into the locking groove due to its own weight. The rolling elements are loaded so that they can freely move, and the engaging grooves have a curvature of approximately the same as the rolling element's -9 curvature. The meshing arc surface has a meshing arcuate surface having a curvature that is approximately the same as the curvature of the rolling element, and a retraction arcuate surface that is continuous with the meshing arcuate surface and is located on the outer side of the meshing arcuate surface. , the retraction arc surfaces are symmetrically reversed and arranged for clockwise rotation locking and counterclockwise rotation locking, and the rolling elements are slid into sliding contact with the retraction arc surface by the centrifugal force that is applied when the low cheater rotates. A roll screen device characterized by nine features.