JPS5824593B2 - Clutch/twisting mechanism in roll screen equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch/twisting mechanism in a roll screen device, and utilizes the elastic force of a built-in torsion coil spring to apply and accumulate and release and restore the elasticity of a curtain, blind, shutter ( Even if an end lock phenomenon occurs in a roll screen device equipped with a clutch/twist mechanism that pulls out, extends, rolls up, and stores a light-weight shutter, projection screen, and other various screens, it can be fixed by temporarily changing the installation space angle of the entire mechanism. Clutch and torsion that can smoothly release the screen, etc., and even when the screen, etc. is pulled out to the maximum extent, it is always possible to wind up the screen, etc. by normal drawer operation, and the occurrence of the bottom lock phenomenon is reliably prevented. It is about the mechanism.

In conventional roll screen devices, the various screens themselves are stretched vertically, in other words, along the vertical direction, and at the same time, the drawer and winding are also carried out using clutches and twisters installed at the top of the window frame, ceiling, etc. The starting point is a mechanical winding device.

In particular, in order to automate the winding process, a torsion coil spring is built into the screen winding tube, one end of which is fixed, and the other end is a rotating tube that rotates as the roll screen is pulled out.
When the drawer is extended, the torsion coil spring accumulates torsional elastic force, is stopped at an appropriate position, and is then released to be wound up.

Such stopping and further releasing movement corresponds to the engagement and release of the rotating system in the clutch/torsion mechanism, and an example of such a clutch/torsion mechanism is the ability to pull out or wind up a screen etc. by its own weight. The rotary cylinder rotatably disengages the gravity-type engaging pawl, which is pivoted on a rotary cylinder (low cheater) so that it is released by the centrifugal action accompanying the rotational movement when it is removed, and swings downward when it stops. It is a ratchet type stopping means that engages with teeth provided on the fitted fixed shaft body (stator), and the other side is a ratchet type stopping means that engages with the teeth provided on the fixed shaft body (stator). This is a rolling element type stopping means in which the loaded gravity rollers, gravity poles, etc. are similarly released by centrifugal action, and when stopped, they fall under their own weight and are held between the fixed shaft body and the rotating cylindrical body.

However, in conventional clutch/torsion mechanisms, no matter which type of stopping means is adopted, the application of torsional elastic force to the torsion coil spring and the relationship between its restoring action and the stopping operation state are not considered at all. It was designed and manufactured.

Therefore, if the torsion coil spring is given the maximum twist and wrapped around it, and the mechanism stops operating when it becomes locked, it will be necessary to pull out the screen etc. slightly after pulling it out. If a so-called end-lock phenomenon occurs, in which the winding operation becomes completely impossible, or if the mechanism stops operating when the screen, etc. is pulled out to its maximum extent, the winding operation will also become impossible even with normal pull-out operations. A so-called bottom lock phenomenon occurred.

Therefore, the present invention was created in view of the above-mentioned problem, and uses the elastic force of the built-in torsion coil spring to accumulate and release various types of screens, etc., to pull them out, extend them, roll them up, and store them. This is a clutch/torsion mechanism that constitutes a rotating system consisting of a stator and a low cheater in a roll screen device that is used for rolling. The floating groove recessed in the inner circumferential surface of the low cheater to be fitted externally shall be intermittently opposed to each other as the low cheater rotates, and the floating groove and engagement with the rolling elements freely loaded in the floating groove The rotation of the low cheetah is prevented by gripping both grooves, and the low cheetah is allowed to rotate by retracting into the idle groove, and rolling elements are formed in the idle groove and the engagement groove at a specific tilt position angle of the entire mechanism. The opening of the floating groove is set at a position opposite to the outer peripheral surface of the stator when the screen, etc. is pulled out to the maximum extent. Due to this, the mechanism stops operating in a state where it is completely impossible to apply torsional elastic force to the torsion coil spring, and it becomes impossible to pull out the screen etc. again after it has been pulled out, and furthermore, it becomes impossible to wind it up. Even if an end lock phenomenon occurs, it can be smoothly released by temporarily changing the installation space angle of the entire mechanism, and when the screen, etc. is pulled out to its maximum extent, it is assumed that the rolling elements are not gripped at all. The purpose is to specify the insertion position and always make it possible to wind up the screen etc. by normal drawer operation, thereby reliably preventing the occurrence of the bottom lock phenomenon.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The reference numeral 20 shown in the figure is a winding tube from which a retractable screen S used as a curtain, blind, shutter (lightweight shutter), projection screen, etc. is pulled out or wound up, and is non-rotatable. It can be installed horizontally or vertically by a fixed bracket member B1 that supports the device horizontally and a rotary support bracket member B2 that rotatably supports it.

Then, torsional elastic force is applied to one end of the winding tube 20 when the screen, etc. S is pulled out, and the screen, etc. S A spring shaft, that is, a clutch/twisting mechanism 100 for rewinding the spring shaft, is built in, and a roller end 90 is detachably fixed to the other end of the spring shaft 20.

The clutch/torsion mechanism 100 rotates a stator 30, which is fixed at a specific position and angle when installed, by loading a rotor 40, which is fitted into an opening at one end of a winding cylinder 20, with a rolling element 50 such as a gravity pole interposed therebetween. The pillow 60 is fitted freely on the outside to form a rotating system, and the stator 30 and the pillow 60 are also fitted on the inside at a predetermined position in the winding tube 20 so as to be able to rotate themselves. The fixed end of the torsion coil spring 80 that is fitted onto the free inner core 70 mounted with the bush 55 interposed is attached to the stator 30.
Then, the winding cylinder 2 is connected with the rotating ends to the pillows 60, respectively.
It has a structure in which an outer core 75 is built into the stator 30 and is mounted between the stator 30 and the pillow 60, and is further fitted onto the torsion coil spring 80.

Therefore, the stake 30 is secured to the bracket member B1 by a metal fixture with a rectangular cross section that is integrally molded and buried in a protruding state without being pulled out or rotated when the synthetic resin stake body is molded. At pin 31, bracket member B1
It is fitted and fixed into the substantially rectangular holding hole 12.

The stake main body forms a stator shaft 32 in the shape of a substantially rod shaft whose axes coincide with each other and from which a holding pin 31 protrudes;
A flange-shaped cover plate 33 is provided protruding from the end of the stator shaft 32 next to the holding pin 31, and an engagement groove 35 is recessed in a stepped shaft portion 34 that is continuous with and protrudes from the cover plate 33. , a stopper 36 that elastically appears and retracts is provided protruding from the other end of the stator shaft 32, and a torsion coil spring 80 is provided.
A connecting groove 3T connecting the stator shaft 32 is cut in the stator shaft 32 surface so as to communicate from the other end surface of the stator shaft 32,
Furthermore, the shaft center of the free inner core 10 is aligned with that of the stator shaft 32, and the fitting pin 38 for rotatably fitting the free inner core bushing 55 with the inner core bushing 55 is aligned with the axis of the stator shaft 32 to form the stator shaft. 32
A rotary flange 30A with a slightly larger diameter than the stepped shaft portion 34 is provided at the end of the stepped shaft portion 34, and a rotary flange 30B with a slightly larger diameter than the stator shaft 32 is provided in the middle of the stator shaft 32, respectively. It is an elevated structure.

The low cheater 40, which is rotatably fitted onto the stator 30 without shifting in the axial direction, is formed of synthetic resin into a substantially cylindrical shape and has an inner diameter slightly larger than the outer diameter of the stator shaft 32.

That is, the structure of the low cheetah 40 is such that the loading section 41 has one end, a contact end surface 41A that contacts the inner surface of the lid plate 33, and a stepped inner circumferential surface 41B that contacts the outer circumferential surface of the stepped shaft section 34. A floating groove 42 is provided on the inner circumferential surface of the loading portion 41 so as to intermittently match the engaging groove 35 as the low cheater 40 rotates. In order to fit and secure, a fitting groove 44 having a locking surface for locking the open end of the winding tube 20 is cut into the outer circumferential surface so as to communicate from the other end surface, and the other end surface is engaged with the stopper 36. A fitting end surface 45 is provided at the other end, and a fitting part 46 is provided on the other end to be fitted and connected to the end of the outer core 75, and a rotating step part 40A that is slidably fitted onto the rotating flange 30A is provided inside the loading part 41. A rotating end 40B is formed on the inner circumferential surface of the cylinder and is continuously formed on the circumferential surface and is slidably fitted onto the rotating flange 30B.

In addition, the floating groove 42 has inclined surfaces 42A and 33A that face each other at an appropriate interval along the rotation system axis and are inclined with respect to the axis.
This inclined surface 42A.

The rolling element 50 is freely loaded into the floating groove 42 so that it falls into the engaging groove 35 by its own weight along the line 33A.

The rolling elements 50 are rigid and spherical, and are, for example, steel balls commonly used as rolling elements in ball bearings.

On the other hand, the inclined surfaces 42A and 33A are arranged and formed in consideration of ease of molding and assembly.

That is, the floating groove 42 itself, which is also recessed from the contact end surface 41A, has only one inclined surface 42A in the axial direction of the low cheater 40 axis, and the other inclined surface 33
A is formed by connecting the outer circumferential surface of the stepped shaft portion 34 to the inner surface of the cover plate 33, which is in contact with the contact end surface 41A when the low cheater 40 is fitted to the stator 30.

The inclination direction of the inclined surfaces 42A and 33A is such that the rolling element 50 in the floating groove 42 is caused to pop out by its own weight, and the stator 30 has a centripetal tendency, regardless of whether it is installed horizontally or vertically with a specified direction. The direction in which the stator shaft 32 is moved aside or falls into the engagement groove 35 is selected, and when the stator shaft 32 is installed vertically and is turned upside down in the specified direction of use, it is retracted to the back of the floating groove 42. Let them do it.

Here, the inclined surfaces 42A and 33A in the illustrated example are parallel to each other, and one inclined surface 42A has a groove width from the abutting end surface 41A that is small on the outer periphery of the loading portion 41 and long on the inner periphery. So, stator 30 or low cheetah 40
The spatial angle with respect to the axis is set to approximately 60 degrees, and the other inclined surface 33A is formed so that the thickness of the protrusion from the inner surface of the cover plate 33 gradually becomes thicker as it goes from the outer circumference to the inner circumference. Therefore, the spatial angle with respect to the axis of the stator 30 or the low cheater 40 is set to approximately 120 degrees.

Then, the rotation of the low cheater 40 is stopped again, and the floating groove 42 and the engagement groove 35 are brought into alignment with each other so that both 42.
In order to improve the certainty of falling when the rolling element 50 is gripped between 35 and the smoothness of separation when releasing the grip, the side wall of the engagement groove 35 itself along the axis of the stator 30 also has an inclined surface 33A. The inclined surface 35A is inclined at the same angle of inclination.

At the same time, the inner periphery of the contact end surface 41A is cut into a trumpet shape so as to come into contact with the inclined surface 33A.

One end of the engagement groove 35 in the groove direction is closed by the rotating flange 30A, but when this rotating flange 30A is not adopted, one end of the retaining groove 35 in the groove direction is closed by the stepped surface of the stepped shaft portion 34. It is also possible to form a communication opening with the outside by using the stepped inner peripheral surface 41B, and this stepped surface may be sloped continuously with the sloped surface 42A so as to contact and match the stepped surface of the stepped inner circumferential surface 41B. (See Figure 5).

As shown in the figure, by setting the inclined surface 33A formed on the inner surface of the cover plate 33 so that its outer periphery is lower than its inner periphery, for example, when a screen S etc. is pulled out, The clutch/torsion mechanism 100 operates,
A torsional elastic force is applied to the torsion coil spring 80 and the coil spring 80 is wound around the stator 30, the pillow 60, and the free inner core 10, and is locked in a state where no further torsional elastic force can be applied, and at the same time, it is engaged with the floating groove 42. A release means for when a so-called end 1 link phenomenon occurs, in which the rolling element 50 is caught between the mating groove 35 and the rotation of the low cheater 40 is completely blocked, making it impossible to pull out or wind up the screen, etc. That is.

In other words, whether it is installed horizontally or vertically, it is necessary to remove the entire roll screen device or change the installation angle so that the inclined surface 33A is located downward along the direction of gravity. By using the vertical installation configuration shown in FIG. 6 with the vertical installation direction specified, and by forcibly giving the winding tube 20 and the low cheater 40 some slack, the rolling elements 50 is released from the grip between the floating groove 42 and the engagement groove 35, and is positioned on the inclined surface 33A and rolls around its outer circumference, thereby reliably releasing the stopped operating state of the clutch/torsion mechanism 100. let

At this time, by interposing the stepped shaft portion 34 surface and the inclined step surface 33B between the inclined surface 35A of the engagement groove 35 and the inclined surface 33A of the cover plate 33, the rolling elements 50 can be smoothly released. It is possible to aim for

On the other hand, when the inclined surface 42A is positioned downward during vertical installation, the stopping action of the clutch/torsion mechanism 100 is exerted; Although it is possible to rotate the torsion coil spring 80, it is impossible to apply a slow twisting release force in the opposite direction, that is, in the unwinding direction to the torsion coil spring 80. This is effective for protecting the coil spring 80.

The structure of the engagement groove 35 and the floating groove 42 is adopted in the case of vertical installation, in which the holding pin 31 protrudes vertically and the inner circumference of the inclined surface 42A is located below. stator 30, even though it may be limited to
, when the low cheater 40 is mated and assembled, the contact end surface 41A
The entire assembly is completed by simply inserting the rolling element 50 into the floating groove 42 through the opening in the wall and bringing the abutting end surface 41A into contact with the inner surface of the cover plate 33, and the advantage is that it can be easily performed. There is.

Not only that, but also 30 stators and 40 low cheetahs.
Each shape is easy to mold, making it easy to assemble and disassemble for maintenance inspections after installation, and to easily perform maintenance such as replacing parts.

Further, the rolling element 50 itself must be gripped to reliably prevent rotation of the low cheater 40, be quickly released from its grip when reversed, and be retracted when rotated. Ru.

Therefore, the engagement groove 35 has an engagement surface 35B formed opposite to the winding direction when reversed due to the restoring elastic force of the torsion coil spring 80, and an engagement surface 35B formed opposite to the pull-out direction.
B has a release guide surface 350 continuously formed along the depth direction thereof.

On the other hand, the floating groove 42 cooperates with the engaging surface 35B to form the rolling element 5.
a meshing arcuate surface 42B that holds 0 against the winding direction;
Continuing from the meshing arcuate surface 42B, a retraction arcuate surface 420 located outside the meshing arcuate surface 42B is provided along the depth direction thereof.

The centrifugal force exerted when the low cheater 40 rotates causes the rolling elements 50 to freely rotate while slidingly contacting the retreating arcuate surface 420.

On the other hand, the engagement groove 35 is formed on at least the outer circumferential surface of the stator shaft 32 of the stator 30, and in the illustrated case, the stepped shaft portion 3
4. It is only necessary to provide one recess on the outer circumferential surface, and if the stator 30 is installed horizontally, there is a regularity in the support direction of the holding pins 31 when the stator 30 is fixed to the bracket member B1, so this should be taken into consideration. It is extremely preferable to provide a plurality of recesses so that they can be used in any direction.

Here, the fixation of the stator 30 during horizontal installation also determines the position of the retaining groove 35, but in this case, the reliability when gripping the rolling element 50 in cooperation with the floating groove 42, and furthermore, , the smoothness of releasing this 50 must also be considered at the same time.

Therefore, the engagement groove 35 is set at a position rotated approximately 35 degrees relative to the gravity direction so that the release guide surface 350 of the engagement groove 35 is inclined slightly downward with respect to the horizontal plane in the gravity direction. There is.

Next, the assembly and fitting of the stator 30 and the low cheater 40 will be explained. This is done by using the resiliency of the stopper 36 provided protrudingly from the stator shaft 32 of the stator 30.

This stopper 36 has an inclined sliding surface 36A and a retaining surface 36B at the end of the stator shaft 32, and a hollow space 3 recessed along the central axis of the stator shaft 32.
The stator shaft 32 is integrally connected to the stator shaft 32 so that it can protrude and retract into the stator shaft 60 and can be engaged and released from the outside.

According to this, the low cheater 40 is attached to the end of the stator 30.
It is only necessary to push it in while fitting the sides of the loading part 41, and the stopper 36 after pushing returns to its original state with its own elastic force and the engagement surface 36B comes into contact with the engagement end surface 45.
The low cheater 40 is prevented from coming off and is reliably fitted in the correct position with the stator 30 in a rotatable state.

On the other hand, the pillow 60 is formed of synthetic resin or the like in the shape of a rod having several steps, and has a shaft main body 61 on the outer circumferential surface of one end.
A fitting groove 62 for fitting and fixing the winding tube 20 is cut,
A connecting groove 63 for connecting the torsion coil spring 80 is communicated with the other end surface of the shaft body 61 and cut into the surface of the shaft body 61, and the shaft center is aligned with the free inner core 70, so that the inner core bush 55 may be connected as the case may be. A fitting pin 64 is inserted between the shaft body 61 and the fitting pin 64 for rotatably fitting the fitting pin 70.
A fitting stepped portion 65 is formed which protrudes from the other end of the shaft body 61 so as to coincide with the axis, and into which the outer core 75 is fitted.

Further, the roller end 90 is formed of synthetic resin into a substantially bottomed cylindrical shape, and is pivoted at the bottom of the cylindrical body 91 in the shaft support hole 15 of the bracket member B2, so that the roller end 90 itself can be pulled out and removed. A fitting groove 9 is provided with a locking surface that locks the open end of the shaft support pin 92, which is integrally molded and embedded, and which locks the open end of the winding tube 20 in order to fit and secure the winding tube 20 therein.
4 are cut into the outer circumferential surface of the cylinder body 91 and communicated with each other from the open end surface of the cylinder body 91.

By the way, the winding cylinder 20 has a substantially cylindrical cylinder shaft body having an outer periphery.
By recessing the storage section 21 having a substantially dovetail-shaped cross section and protruding a locking piece 22 that partially closes the opening of the storage section 21,
A fixing groove 23 is formed along the axial direction,
Rigid band-shaped locking plate 11 fixed to the edge of the screen etc.
0 is obliquely stored and locked in the storage portion 21 in a detachable manner.

As a result, not only can the low cheater 40, the pillow 60, and the roller end 90 be freely attached and detached, but also the low cheater 40 can always be attached and detached at a fixed position.

Therefore, when using the screen S, etc., it may be pulled out to the maximum depending on the usage condition, and at this time, the clutch/torsion mechanism 100 is stopped and rotated in any direction relative to the low cheater 40. In other words, it is completely impossible to pull out the screen etc. S to release the clutch/twisting mechanism 100.
The so-called bottom lock phenomenon cannot be released by normal operations, and furthermore, there is a risk that the screen or the like may fall off or peel, so it must be avoided.

One conventional method for releasing this is to tilt the entire pulled-out screen, etc., at an appropriate angle with respect to the direction of gravity, and then perform the normal operation.Another method is to After directly rotating the rotary cylinder (low cheater) at an appropriate angle, this rotational force is released instantaneously, and in any case, it cannot be denied that the handling operation is troublesome and time-consuming.

These phenomena are caused by the stop operation position of the clutch/torsion mechanism related to the rotation angle of the rotary cylinder (low cheater) when the screen, etc. S is pulled out to its maximum, and the fixed position of the edge of the screen, etc. This is thought to be due to the fact that the relationship between

Therefore, when the screen, etc. S is pulled out to the maximum extent during horizontal installation, the fixing groove 23 to which the edge of the screen, etc. Fitting groove 44 of low cheater 40
is also located downward at the same time (focusing on this, at this time,
The floating groove 42 recessed in the low cheater 40 is connected to the stator 3.
The floating groove 42 and the fitting groove 44 maintain a constant relationship in the rotational direction of the low cheater 40 so that they face the outer circumferential surface of the stator 30, that is, they do not match the engaging groove 35 formed in the stator 30 at all. It is provided at a predetermined position.

To explain this with reference to FIG. 7, as mentioned above, the retaining groove 35 of the stator 30 is at a position rotationally phased by approximately 35 degrees with respect to the direction of gravity when installed horizontally, and the floating groove 42 of the low cheater 40 is Four fitting grooves 44 are provided at equal intervals, and therefore, fitting grooves 44 are provided at positions along a line connecting mutually opposing floating grooves 42.

By doing this, the fixing groove 23 and the fitting groove 44 are aligned with the low cheater 40 when the screen etc.
Even if the floating groove 42 is located below the engaging groove 3
5 do not face each other, the rolling element 50 does not come out of the free groove 42, and no gripping action is exerted on the rolling element 50 between the two 42.35, leaving the clutch/torsion mechanism 100 in a free state. be able to.

That is, rotation at an angle within the release range (release starting angle) of the low cheater 40 that is sufficient to allow a slight pull-out operation of the screen, etc., when releasing the rolling element 50 in the clutch/torsion mechanism 100 The final stop position is set at a position where the pull-out length of the screen, etc. is shortened by an amount corresponding to .

After all, considering the case where the fitting groove 44 is located at the lowest position,
Low Cheetah 40 Number of stops per rotation and locking groove 3
5. A stop position is set where the floating grooves 42 face each other, and as described above, by specifying the stop position and the fixed position of the screen, etc. S with respect to the winding cylinder 20, the bottom lock phenomenon can be prevented. This can be prevented, and such identification can be easily performed during assembly by employing the above-described structure.

Further, the winding direction of the torsion coil spring 80 is set and formed in advance so that the screen or the like S is wound up when it is pulled out, and its cross section is shown as being approximately rectangular.

Both ends of the torsion coil spring 80 are connected bent ends that are bent inward, and one connected bent end whose fixed end is a flange is connected to the stator 30, and the other connected bent end whose rotating end is a flange. The bent ends are removably connected to the pillows 60, respectively.

The free inner core 70 is formed of synthetic resin or metal into a substantially cylindrical shape, and has the fitting pins 38 at both ends thereof.
．． 64 is fitted externally.

Further, the outer core 75 is formed into a cylindrical shape of synthetic resin or metal so that the torsion coil spring 80 is fitted therein,
One end thereof is fitted to the fitting part 46 of the low cheater 40, and the other end is fitted to the fitting step part 65 of the pillow 60, thereby preventing noise from the torsion coil spring 80 itself.
It is useful for preventing scattering of lubricants such as silicone oil and antirust oil, and for ensuring rust prevention, and provides completeness of the clutch/torsion mechanism 100 itself as a single mechanical component.

The present invention is constructed in a diagonal manner and, in use, the stator 30 of the clutch and torsion mechanism 100
is firmly fixed to the bracket member B1, etc., and an appropriate tension is applied to the torsion coil spring 80 by rotating the stake 30 via the holding pin 31 depending on the weight of the screen etc. S, winding strength, etc. The bracket member Bl is additionally set and, on the other hand, is pivotally supported by the bracket member B2 etc. at the roller end 90.

Install between B2.

Then, by sequentially pulling out the screens, etc., the winding tube 2
0. The pillow 60 is driven to rotate, and as a result, the torsion coil spring 80 whose one end is connected to the stator 30 is given a torsional elastic force.

At this time, although the low cheater 40 is rotated around the stator 30, the pulling out of the screen S etc. at an overspeed causes the rolling elements 50 loaded in the idler groove 42 to move toward the retracting arcuate surface 420 due to its centrifugal action. Even if the low cheater 40 is retracted or falls into the retaining groove 35, it is projected from the retaining groove 35 along the release guide surface 350, so that the low cheater 40 can be rotated smoothly.

After pulling out the screen, etc. S to a predetermined length in this way, if necessary, return it slightly so that the rolling element 50 is sandwiched between the engaging circular arc surface 42B in cooperation with the engaging surface 35B, and the rolling element 50 By being held in its mouth, the rotation of the low cheater 40 in the winding direction of the screen S etc. due to the restoring action of the torsion coil spring 80 in which torsional elastic force is accumulated is prevented (see FIG. 3).

Next, due to the rotation of the low cheater 40 caused by slightly pulling out the screen, etc.
0 to release the grip, and then release the screen S, etc., the rotation system will be accelerated by the restoring action of the torsion coil spring 80, and if the speed reaches a certain speed or higher, the clutch will remain in the released state. , the screen, etc. S is automatically wound up, and the rolling elements 50 at that time are retracted to the retracting circular arc surface 420 by centrifugal action, so that the smooth winding of the screen, etc. S is not impaired at all (
(See Figure 4).

Therefore, even if an end lock phenomenon occurs, the mechanism 100
By reversing the overall specified inclination position angle, specifically, the vertical direction of the specified use condition in vertical installation, the rolling element 50 is attached to the rotating system shaft formed in the idler groove 42 and the engagement groove 35. A floating groove 42 is provided along the inclined surfaces 42A and 35A.
Since it is designed to be retracted to the back, it can be smoothly released by temporarily changing the angle of the installation space and at the same time performing a slight forced pull-out operation.

In addition, when the screen, etc.
The openings 2 and 42 are positioned opposite to the outer circumferential surface of the stator 30, that is, the floating grooves 42 and the engaging grooves 35 do not face each other. The gripping action of the screen is not exerted, and the occurrence of the bottom lock phenomenon is reliably prevented.
It is possible to wind up.

From the above description, the embodiments of the present invention and the effects thereof are clear; however, it is easy to modify them to other shapes and structures, and the scope of the present invention is not limited to the above-described embodiments. is also clear.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of the roll screen device in use, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a non-operational state. FIG. 4 is a sectional view taken along line 3-4 in FIG. 2 when the stop is released, FIG. 5 is an exploded sectional view of the stator and rotor, and FIG. The figure is a sectional view of a main part when the end lock phenomenon is released, and FIG. 7 is a sectional view taken along the line 7-7 in FIG. 2, showing that the bottom lock phenomenon does not occur. S... Screen, etc., B1... Bracket member, 12... Holding hole, B2...
Bracket member, 15... Pivot hole, 20...
... Winding cylinder, 21 ... Storage section, 22 ...
...Latching piece, 23...Fixing groove, 30...
・Stator, 30A...Rotating flange, 30
B... Rotating flange, 31... Holding pin, 32... Stator shaft, 33...
... Lid plate, 33A ... Inclined surface, 33B ...
... Inclined stepped portion surface, 34... Stepped shaft portion, 35.
...Engagement groove, 35A...Slanted surface, 35B
...Matching surface, 350...Release guide surface,
36...Stopper, 36A...Sliding surface, 36B...Engaging surface, 360...Vacancy, 37...Connection groove, 37A...Guide communication part, 37B...Circumferential guide part, 370...
... Connecting portion, 38... Fitting pin, 40...
...low cheetah, 40A...rotating step, 4
0B...Rotation end, 41...Loading section, 4
1A...Abutting end surface, 41B...Stepped inner circumferential surface, 42...Idle groove, 42A...Slanted surface, 42B...・Meshing arc surface, 42C...
...Evacuation arc surface, 42D...Tip, 44...
... Fitting groove, 45 ... Inclined end surface, 46 ...
...Fitting part, 50...Rolling element, 55...
... Inner core bush, 60 ... Pillow, 61 ... Shaft body, 62 ... Fitting groove, 6
3... Connection groove, 63A... Guide communication part, 63B... Circumferential guide part, 63C...
Connecting portion, 64... Fitting pin, 65... Fitting stepped portion, 70... Free inner core, 75...
... Outer core, 80 ... Torsion coil spring, 90 ... Roller end, 91 ...
...Cylinder body, 92... Pivotal support pin, 94...
... Fitting groove, 100 ... Clutch/torsion mechanism, 110 ... Locking plate.

Claims (1)

[Scope of Claims] 1. A stator and a low cheater in a roll screen device that uses the elastic force of a built-in torsion coil spring to pull out, extend, roll up and store various screens, etc. by applying, accumulating, and releasing and restoring the elastic force of a built-in torsion coil spring. A clutch/torsion mechanism that constitutes a rotating system consisting of an engagement groove recessed in the outer circumferential surface of the stator that is held at a specific position and angle when installed;
A floating groove recessed in the inner circumferential surface of the low cheater, which is rotatably fitted onto the stator, is intermittently matched with the inner peripheral surface of the low cheater as the low cheater rotates. The rotation of the low cheetah is prevented by gripping both the idle groove and the engagement groove, and the low cheetah can be rotated by retracting into the idle groove, and the rolling element is rotated at a specific tilt position angle of the entire mechanism. can be retracted to the back of the idler groove along the inclined surface with respect to the rotating system shaft formed in the idler groove and the engagement groove, and the opening of the idler groove is A roll SF characterized in that the portion is located at a position opposite to the outer circumferential surface of the stator. Clutch/torsion mechanism in lean equipment.