JP3005666U - Roll screen device - Google Patents

Abstract

(57) [Summary] [Purpose] In a roll screen device, the coil spring fully exerts its function, and the opposite rotation forces do not act between the two sides of the screen take-up cylinder, resulting in abnormal noise and noise during winding. There is no sense of quality, and it is easy to take out from the winding cylinder at the time of repair. [Structure] A torsion coil spring 2 and a reverse rotation locking clutch 3 are provided in a screen winding cylinder 1 rotatably supported, and a fixed shaft portion free from rotation of the winding cylinder 1 is provided at one end of the coil spring 2. 5 is fixed, a rotatable disc 8 is provided adjacent to the fixed shaft portion 5 so as to be rotatable with the winding cylinder 1, and a rotatable short cylinder rotatable with the winding cylinder 1 at the other end of the coil spring 2. 11 is fixed, and in the rotatable short cylinder 11,
The fixed shaft portion 13 locked and supported by the bracket member 12 on that side is engaged with the fixed shaft portion 13 and the rotatable short cylinder 11
A clutch 3 is provided between the two fixed shaft parts 5, 13 and
Are connected and fixed by a spring support cylinder 16 inserted through the coil spring 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a roll screen device, that is, a device capable of winding up a curtain, a blind, a projection screen, etc. by a torsional force of a built-in torsion coil spring and pulling it out to a desired position and stopping it.

[0002]

[Prior art]

 Several roll screen devices have been proposed in the past, such as those disclosed in Japanese Utility Model Publication No. 56-43516 and Japanese Patent Publication No. 58-41394. These rotatably support the screen take-up tube between the bracket members on both sides, and apply a twisting force to the torsion coil spring built into the take-up tube by rotating the take-up tube when the screen is pulled out. The clutch that has accumulated the balls and their engaging recesses stops and reverses the reverse rotation of the winding cylinder, and keeps the screen pulled out and winds it.

The operating portion of the roll screen device is built in the screen winding cylinder using a torsion coil spring as a drive source. That is, the rotating shaft that is rotatable together with the winding cylinder is fixed to one side of the coil spring, and the fixing shaft that is locked to rotate by the bracket member on that side is fixed to the other side of the coil spring. Then, a rotatable short cylinder that is rotatable together with the winding cylinder is fitted around the outer periphery of the fixing shaft portion, and a reverse locking clutch having a rolling element and a locking recess is formed between the fixing shaft portion. The spring supporting cylinder is provided and inserted into the coil spring, and both end portions of the spring supporting cylinder are fitted to the rotating shaft portion and the fixed shaft portion as free ends.

[0004]

[Problems to be solved by the device]

 In the conventional roll screen device, as described above, by rotating the take-up tube of the screen drawer, the rotary shaft portion near one side is rotated in the take-up cylinder, and the rotary shaft portion and the fixed shaft portion on the other side are rotated. While applying and accumulating a torsional force to the coil spring fixed to, the rotation of the winding cylinder is transmitted to the rotatable short cylinder for clutch around the outer periphery of the fixed shaft, and the rotation of the rotatable short cylinder causes the clutch engagement. It is possible to release the stop.

In the conventional device that operates as described above, the structure in which the rotating shaft portion and the fixed shaft portion are connected and fixed by the spring support cylinder inserted through the coil bar cannot be used. The cylinder has a structure in which both side ends are simply fitted into both shaft parts as free ends. Therefore, the following problems have occurred.

A) The torsion coil spring, which is the drive source of the roll screen, may not be able to fully exhibit its function. That is, the coil spring is inside the screen winding cylinder, one end of which is fixed to the fixed shaft portion and the other end of which is fixed to the rotary shaft portion which is integral with the winding cylinder. Rotates about the axis of the spring bearing cylinder inserted into the spring during reverse rotation. However, the spring bearing cylinder is in a stable state because it is simply fitted as a free end to both the fixed shaft portion and the rotary shaft portion. Therefore, the coil spring that rotates around the spring supporting cylinder as an axis must be unstable in rotation, and there is a possibility that the function as a driving force source cannot be fully exhibited.

B) When the screen is wound up, abnormal noises and noises are likely to occur, and the screen tends to lack a sense of quality. That is, when the screen is wound, the screen winding cylinder rotates integrally with the spring through the rotating shaft due to the torsional force applied and accumulated in the coil spring. It is in an unstable state because it is simply fitted to the shank at the free end. For this reason, the vibration accompanying the rotation of the coil spring is transmitted to the spring support cylinder in an unstable supporting state, and the vibration and the rotation easily cause abnormal noise and noise, which lacks a sense of luxury.

C) Between the two side parts of the roll screen device, forces act so that they can be rotated in opposite directions. That is, when the screen take-up cylinder rotates when the screen is pulled out, the rotary shaft part mounted on one side of the take-up cylinder rotates, and the coil spring whose one end is fixed to the rotary shaft part is wound. Therefore, the twisting force is applied and accumulated. The clutch that locks the reverse rotation of the rotary shaft by this torsional force is between the fixed shaft and the rotatable short cylinder provided on the opposite side of the rotary shaft. Therefore, the rotating shaft part and the rotatable short cylinder exert forces in opposite rotating directions, and force is applied between both sides of the take-up cylinder to twist (twist) it, resulting in a lack of smooth operation. At the same time, there was a problem in strength.

D) Further, it is difficult to remove the coil spring, the clutch, etc. from the winding cylinder at the time of repair and inspection. That is, in order to repair and inspect the coil spring and clutch, it is necessary to pull out that part to the outside, but the internal rotating shaft part and the rotating shaft part on one side are simply connected by the coil spring, and The bearing tube is simply mated at its free end. Therefore, when the fixed shaft portion was pulled out, the engagement between the fixed shaft portion and the spring support cylinder was disengaged, and the rotary shaft portion simply connected by the coil spring could not be pulled out well, and the work could not be performed smoothly.

The present invention is intended to solve the problems of the conventional roll screen device. That is, the purpose of the present invention is that the torsion coil spring, which is the driving force source of the roll screen device, fully exerts its function, and the forces forcibly twisting in opposite directions are applied between the both sides of the screen winding cylinder. To provide a roll screen device that does not have abnormal noise or noise when winding the screen and has a high-class feeling, and that facilitates smooth extraction work during repairs and inspections of coil springs and clutches. is there.

[0011]

[Means for Solving the Problems]

 The roll screen device according to the present invention is provided with a twisting coil spring 2 as a driving force source and a reverse rotation locking clutch 3 in a screen winding cylinder 1 rotatably supported, so that the winding cylinder when the screen is pulled out. In a roll screen device that applies and accumulates a twisting force to the coil spring 2 by the rotation of 1 and maintains the screen drawn state and winds it,

A fixed shaft portion 5 which is free from the rotation of the winding cylinder 1 is fixed to one end of the coil spring 2 which is housed in the screen winding cylinder 1, and the fixed shaft portion 5 is adjacent to the fixed shaft portion 5. A rotatable disc 8 is provided which is engaged with the winding cylinder 1 by the concave and convex portions 6 and 7 and is rotatable with the winding cylinder 1.

To the other end of the coil spring 2 is fixed a rotatable short cylinder 11 which is engaged with the winding cylinder 1 at the concave / convex portions 9 and 10 and is rotatable together with the winding cylinder 1. The fixed shaft portion 13 supported by being locked by the bracket member 12 on that side is engaged with the inner peripheral portion of the rotating short cylinder 11.

A reverse rotation locking clutch 3 including a rolling element 14 and a locking recess 15 is provided between the fixed shaft portion 13 and the rotatable short cylinder 11.

Further, the both fixed shaft portions 5 and 13 are connected and fixed by a spring support cylinder 16 inserted into the coil spring 2.

In the above structure, the coil spring 2, the fixed shaft portions 5, 13 and the clutch 3 are connected and fixed by the coil spring 2 and the spring support cylinder 16, and the fixed shaft provided with the rotatable disk 8 is provided. It is loaded from the side of the winding section 1 into the inside of the winding cylinder 1, the rotatable short cylinder 11 is engaged and fixed to the side end of the winding cylinder 1, and they are wound up at the time of repair and inspection. It can be pulled out from the cylinder 1.

In the figure, 17 is a cap for supporting the take-up cylinder, which is to be fitted to the opposite side of the take-up cylinder 1 on which the rotatable short cylinder 11 is engaged, and the bracket member 18 on that side is rotatable. To support. As described above, the other end of the winding cylinder 1 is rotated by the bracket member 12 on the locking shaft end 19 of the fixed shaft 13 inside the rotatable short cylinder 11 to be engaged therewith. I'm supporting you.

[0018]

[Action]

 a) In the roll screen device according to the present invention, when the screen 4 is used, the screen 4 may be pulled downward to rotate the screen winding cylinder 1 forward and the screen 4 may be pulled out. A fixed shaft portion 13 provided at one end of the winding cylinder 1 is supported by a bracket member 12 on that side so as not to rotate, but a rotatable short cylinder 11 around the fixed shaft portion 13 is provided. Since the reverse rotation locking clutch 3 does not operate and can rotate, the winding cylinder 1 rotates together with the rotatable short cylinder 11 without any trouble.

When the rotatable short cylinder 11 is rotated by the rotation of the winding cylinder 1, the coil spring 2 whose one end is fixed to the rotatable short cylinder 11 is rotated. The fixed shaft portion 5 that fixes the other end portion of the coil spring 2 in the inner part of the winding cylinder 1 is fixedly connected to the fixed shaft portion 13 at the other end portion via the spring support cylinder 16. The fixing member 13 is locked by the bracket member 12 on that side so as not to rotate. Therefore, when the coil spring 2 is rotated by the rotation of the winding cylinder 1, the coil spring 2 is wound and a twisting force is applied and accumulated.

When the screen 4 is pulled out by a desired length and released, the coil spring 2 tries to rotate in reverse due to the accumulated torsional force, so that the rotatable short cylinder 11 fixed to one end of the coil spring 2 is It reversely rotates and tries to reversely rotate the winding cylinder 1. At this time, the rolling element 14 is engaged with the locking recess 15 by the reverse rotation locking clutch 2 provided between the rotatable short cylinder 11 and the fixing shaft portion 13 on the inner periphery of the rotatable short cylinder 11. The reverse rotation of is locked. As a result, the reverse rotation of the take-up cylinder 1 which is integral with the rotatable short cylinder 11 is also locked, and the screen 1 maintains the desired position where it has been pulled out.

B) Next, when the screen 4 is rolled up, the screen 4 may be slightly pulled down. Since the screen winding cylinder 1 slightly rotates and the rotatable short cylinder 11 integrated with the screen winding cylinder slightly rotates, the rolling element 14 is engaged by the reverse rotation locking clutch 3 in the rotatable short cylinder 11. The rotatable short cylinder 11 can be rotated around the outer periphery of the fixed shaft portion 13 by being disengaged from the stopper recess 15. As a result, the rotatable short cylinder 11 is reversely rotated by the torsional force accumulated in the coil spring 2 having one end fixed, and the winding cylinder 1 integrated with the rotatable short cylinder 11 is also rotated. The screen 4 is reversely rotated and is wound up to the end.

In the above case, the coil spring 2 rotates in the reverse direction with the spring bearing cylinder 16 inserted into the coil spring 2 as the axis. The spring bearing cylinder 16 is different from the conventional one in that one end is fixed to the fixed shaft portion 13 on one side of the winding cylinder 1 and the other end is located farther inside the winding cylinder 1. It is fixed to one fixed shaft portion 5.

Therefore, the spring bearing cylinder 16 is firmly fixed and stable, and the spring bearing cylinder 16 does not vibrate or rotate even when the coil spring 2 rotates in the reverse direction.・ No noise will be generated and quality will not deteriorate.

Further, since the coil spring 2 rotates about the spring bearing cylinder 16 which is firmly fixed as described above, the coil spring 2 is prevented from swinging or shaking due to the rotation, and even in the reverse rotation. It is stable, and the coil spring 2 comes to exert its function as a driving force source almost completely.

Furthermore, the reverse rotation locking clutch 3 that locks the reverse rotation of the winding cylinder 1 is inside the rotatable short cylinder 11 that is integral with the winding cylinder 1 and has one end of the coil spring 2 fixed. It is set around. That is, the rotatable short cylinder 11, which directly receives the reverse rotation of the coil spring 2 due to the accumulated torsional force, is directly locked by the clutch 3 on the inner circumference of the rotatable short cylinder 11. . Therefore, the side on which the reverse rotational force acts on the take-up cylinder 1 and the side on which the clutch for locking the same is provided are on the same side, which is different from the conventional opposite side. There is no force acting between them in opposite directions.

Similarly, when the reverse rotation locking clutch 3 is disengaged and the coil spring 2 is reversely rotated by a torsional force, the reverse rotation force is directly transmitted from the rotatable short cylinder 11 to the winding cylinder 1, The take-up cylinder 1 rotates in the reverse direction. At this time, the cap 17 is rotatably supported by the bracket member 18 on the other side of the winding cylinder 1 which rotates in the reverse direction, and the cap 17 is integrated with the winding cylinder 1 in the inner part of the winding cylinder 1. The rotatable disk 8 is free to rotate with the spring bearing cylinder 16 and the fixed shaft portion 5 on that side and simply idles. Therefore, also in this respect, the forces that twist the opposite directions of rotation between the both sides of the winding cylinder 1 do not act.

Moreover, as described above, the rotatable disk 8 which is integral with the winding cylinder 1 is free to rotate freely with respect to the spring support cylinder 16 and the fixed shaft portion 5 on that side. When the winding cylinder 1 reversely rotates due to the torsional force, the vibration and vibration caused by the reverse rotation of the coil spring 2 and the winding cylinder 1 are difficult to be transmitted to the spring support cylinder 16 and are in a stable state. Therefore, the coil spring 2 which rotates in the reverse direction with the stable spring bearing cylinder 16 as the axis serves the net ability.

C) In the roll screen device according to the present invention, for example, when some trouble occurs in the coil spring 2, the clutch 3 or the like, it is necessary to pull them out from the screen winding cylinder 1 and repair / replace them. Both ends of the coil spring 2 are fixed to a fixing shaft portion 5 and a rotatable short cylinder 11, respectively, and both fixing shaft portions 5 and 11 are connected and fixed by a spring support cylinder 16.

Therefore, when the fixed shaft portion 13 on the side locked by the bracket member 12 is pinched and pulled out from one end of the winding cylinder 1, the rotatable short cylinder 11 on the outer periphery of the fixed shaft portion 13 is removed. The clutch 3 between them and the coil spring 2 whose one end is fixed to the other fixed shaft portion 5 that is connected and fixed by the spring bearing cylinder 16 can be pulled out well integrally, and this pulling out work is smooth and easy. You can do it.

[0030]

【Example】

 1 to 3 show an embodiment of a roll screen device according to the present invention. The basic configuration is that a rotatable screen winding cylinder 1 is provided with a torsion coil spring 2 as a driving force source and a reverse rotation locking clutch 3 that locks and releases reverse rotation, and winds when the screen is pulled out. A twisting force is applied to and accumulated in the coil spring 2 by the rotation of the take-up cylinder 1, and after the screen is pulled out, the reverse rotation is locked and released, and the screen 4 is wound.

In the above structure, one end of the coil spring 2 provided inside the winding cylinder 1 is smaller than the inner diameter of the winding cylinder 1 and is fixed to the fixed shaft portion 5 which is free when the winding cylinder 1 rotates. It is fixed by being screwed onto the formed male screw portion. Further, adjacent to the side of the fixed shaft portion 5, there is a concave portion 6 which engages with a convex portion 7 formed on the inner circumference of the winding cylinder 1, and a rotatable disc 8 which rotates together with the rotation of the winding cylinder 1. Is rotatably fitted to a side end portion of a spring support cylinder 16 described later, and is prevented from coming off by a coming-off prevention pin 20.

The other end of the coil spring 2 has a concave portion 9 that engages with a convex portion 10 formed on the inner circumference of the screen winding cylinder 1, and is rotatable when the winding cylinder 1 rotates. The short cylinder 11 is fixed by being screwed onto the male screw portion. The rotatable short cylinder 11 has an outer diameter such that it can be fitted into the other end of the winding cylinder 1, and the side end 19 of the inner circumference is fixed by the bracket member 12 on that side. The fixed shaft portion 13 supported is engaged.

Between the fixed shaft portion 13 locked by the bracket member 12 and the rotatable short cylinder 11, the forward rotation of the rotatable short cylinder 13 when the screen 4 is pulled out is free and the reverse rotation is possible. A reverse rotation lock clutch 3 having a lockable rolling element 14 and a locking recess 15 is provided. The clutch 3 itself is the same as a conventionally known clutch.

A spring bearing cylinder 16 having an outer diameter smaller than the inner diameter is inserted into the coil spring 2, and both end portions of the spring bearing cylinder 16 are located at the center of the fixed shaft portions 5 and 13. It is inserted through the hole and connected / fixed by fixing pins 21 and 22.

Then, the rotatable disc 8 is inserted into the take-up cylinder 1 from the side of the fixed shaft portion 5 provided adjacently, and the rotatable disc 8 is recessed in the inner part of the take-up barrel 1. The protrusions 6 and 7 are integrally engaged in the rotation direction, and the rotatable short cylinder 8 is integrally engaged with the other side of the winding cylinder 1 in the rotation direction by the recesses and protrusions 9 and 10. Interior.

It should be noted that one end of the take-up cylinder 1 is supported by locking the locking-side end 19 of the fixed shaft portion 13 in the rotatable short cylinder 8 with the bracket member 12 on that side. However, the cap 17 is fitted to the other end of the winding cylinder 1, and the side end of the cap 17 is rotatably supported by the bracket member 18 on the other side.

[0037]

[Effect of device]

 As is clear from the above, the roll screen device according to the present invention is different from the conventional one and has the following unique effects.

1) Since the spring bearing cylinder, which serves as the shaft core when the coil spring rotates, has both side portions connected and fixed to the fixed shaft portion on each side, so that the spring bearing cylinder is stable unlike the conventional one. It is installed. Therefore, when winding the screen, when the coil spring reversely rotates due to its twisting force, the coil spring does not shake, rotate, or shake, and the coil spring fully exhibits its function as a driving force source. You will be able to do it.

2) As described above, since the spring support cylinder is stably attached, when the coil spring reversely rotates when the screen is wound, the coil spring does not swing, rotate, or shake. Therefore, unlike the conventional method, no unusual noise or noise is generated due to the spring support cylinder when the screen is wound, and a high-class feeling can be provided.

3) The reverse rotation locking clutch of the screen winding cylinder is provided between the rotatable short cylinder fixed at one end of the coil spring and the fixed shaft portion of the inner circumference thereof, and the coil spring is provided with a torsional force. A rotatable short cylinder that directly receives the force of reverse rotation is directly locked by a clutch provided on its inner circumference.

Therefore, unlike the conventional structure in which a reverse rotational force acts on the other side of the screen winding cylinder and the reverse rotation is locked by the clutch provided on the other side, The forces that try to rotate in opposite directions do not act on both sides of the take-up cylinder. Also, when the clutch disengages and the coil spring reversely rotates due to the torsional force, the reverse rotating force is directly transmitted from the rotatable short cylinder to the screen winding cylinder, so that the reverse rotation applied to the other side of the conventional case Unlike the case where the force causes the take-up tube to rotate in the reverse direction, the forces that try to rotate in opposite directions do not occur between the both sides of the take-up tube.

4) When the winding cylinder reversely rotates due to the torsional force of the coil spring, the rotatable disc integrated with the winding cylinder is free from the spring bearing cylinder and the fixed shaft portion on that side. Since the coil spring is rotating, it is difficult for vibrations and vibrations due to the reverse rotation of the coil spring and the winding cylinder to be transmitted to the spring bearing cylinder, and the spring bearing cylinder is in a stable state. For this reason, the coil spring that rotates in the reverse direction with the stable spring bearing cylinder as the shaft center can also exert its net ability as a driving force source.

5) When repairing or inspecting the coil screen device, it is necessary to pull out the coil spring, the clutch and the like from the screen winding cylinder. In the conventional type, both sides of the spring bearing cylinder are simply fitted into each fixed shaft portion as free ends, and when one of the fixed shaft portions is pulled, the spring bearing cylinder is disengaged from the fixed shaft portion. I could not pull out the coil spring and the other fixed shaft part smoothly. In the coil screen device of the present invention, the spring supporting cylinders inserted through the coil springs as described above are connected and fixed to the fixed shaft portions on both sides. Therefore, by pulling out the fixed shaft on one side, the coil spring and the other fixed shaft can be pulled out at the same time, so that the work of pulling out from the take-up cylinder for repairs and inspections can be done smoothly, easily and quickly. It can be carried out.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a coil screen device according to the present invention.

2 is a partially cutaway enlarged front view showing a portion of the embodiment shown in FIG. 1 which is close to one side portion. FIG.

FIG. 3 is a partially cutaway enlarged front view showing a portion of the embodiment shown in FIG. 1 closer to the other side portion.

[Explanation of symbols]

1-winding cylinder 2-coil spring 3-clutch 4-screen 5-fixed shaft portion 6-recessed portion 7-convex portion 8-rotatable disc 9-recessed portion 10-convex portion 11-rotatable short cylinder 12-bracket member 13 -Fixed shaft portion 14-Rolling element 15-Locking recess 16-Spring support cylinder 17-Cap 18-Bracket member 19-Locking side end 20-Retaining pin 21-Fixing pin 21-Fixing pin

Claims (1)

[Scope of utility model registration request] 1. A screen winding cylinder 1 rotatably supported is provided with a torsion coil spring 2 as a driving force source and a reverse rotation locking clutch 3 so that the winding cylinder 1 can be rotated when the screen is pulled out. In a roll screen device for imparting and accumulating a twisting force to the coil spring 2 and maintaining and winding the screen, a winding screen 1 is attached to one end of the coil spring 2 housed in the screen winding cylinder 1. The fixed shaft portion 5 that is free from the rotation of the winding shaft 1 is fixed to the position adjacent to the fixed shaft portion 5.
Is provided with a rotatable disk 8 which is engaged with the concave and convex portions 6 and 7 and is rotatable together with the winding cylinder 1, and the winding cylinder 1 and the concave and convex portions 9 are provided at the other end of the coil spring 2. A rotatable short cylinder 11 that engages at 10 and is rotatable together with the winding cylinder 1 is fixed, and is supported by the bracket member 12 on the side of the rotatable short cylinder 11 on the inner peripheral portion thereof. The fixed shaft portion 13 is engaged, and the rolling element 14 is provided between the fixed shaft portion 13 and the rotatable short cylinder 11.
A reverse rotation stop clutch 3 including a locking recess 15 and a locking recess 15 is provided, and the fixed shaft portions 5 and 13 are connected and fixed by a spring bearing cylinder 16 inserted into the coil spring 2. Roll screen device.