JPS631759Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a manual winding device used for roll screens, etc. When storing curtains, blinds, projection screens, etc. This can be done manually by towing the machine, and it can be operated with a constantly averaged constant operating force without being affected by changing suspended loads such as roll screens, etc.
This invention relates to a manual winding device used for roll screens, etc., which is robust, durable, and compact.

BACKGROUND ART Conventionally, various deceleration mechanisms have been provided for manually winding up and unwinding retractable roll screens used as curtains and blinds. However,
They have the disadvantage of being larger than the main body, such as a roll screen, and the screen itself is not easy to install or replace.

This invention was devised to solve the above-mentioned inconvenience, and its gist is that a bracket placed at the end of a screen shaft of a required roll screen, etc.
A groove wheel capable of forward and reverse rotation is supported concentrically with the axis of the screen, and a holding frame for holding the groove wheel inside is fixed to a bracket, and the holding frame has a multi-stage cylindrical shape with stepped portions. The groove wheel is held in the large diameter cylindrical part, and a planetary gear reduction mechanism connected to the groove wheel is arranged in the small diameter cylindrical part, and the output end of the planetary gear reduction mechanism is located at the open end of the small diameter cylindrical part. is protruded, and an engagement disk having a diameter larger than the outer circumferential surface of the small-diameter cylinder part and having an engagement protrusion on the circumferential surface that engages with an engagement groove in an engagement hole opened at the end of the screen shaft is fixed to this output end. death,
A brake disc is disposed on the groove wheel and the inner surface of the holding frame facing the side surface of the groove wheel, and the brake disk is arranged to constantly elastically press the side surface of the groove wheel against the bracket surface, and a loop-shaped operating string is wound around the groove wheel. This consists in that the small-diameter cylindrical portion of the holding frame is fitted into the engagement hole at the end of the screen shaft.

An embodiment of this invention will be described below with reference to the drawings.

In the figure, S indicates a retractable roll screen used as a curtain/blind or a projection screen, and one end of the screen is appropriately fixed to a substantially cylindrical screen shaft 1. Both ends of the screen shaft 1 are closed by shaft supports 2A and 2B, and one shaft support 2A is fixed to the ceiling or wall.
It is rotatably supported by a shaft in the shape of a bracket 3A, and the other shaft support 2B is externally fitted to the winding device according to this invention, which is arranged in a substantially L-shaped bracket 3B which is similarly fixed to the ceiling or wall. be done. An engagement hole 4 that is long in the axial direction of the screen shaft 1 is formed in the open end of the shaft support 2B, and an appropriate number of cross sections are formed on the inner circumferential surface of the engagement hole 4 in the axial direction of the screen shaft 1. A semicircular engagement groove 5 is formed.

A multi-stage cylindrical holding frame 10 is detachably fixed to the bracket 3B with screws 11 or the like. That is, on the mounting surface of the holding frame 10 of the bracket 3B, there is a shaft support hole 6 in which the groove wheel 20 serving as a driving means is pivotally supported, and a large number of mounting holes 7 arranged at appropriate pitches on a circle centered on this shaft support hole 6. and are perforated, and
A plurality of mounting holes 12 are bored in the bracket abutting surface of the holding frame 10 at intervals that are multiple times the pitch of the mounting holes 7. Therefore, the holding frame 10 can be mounted on the bracket 3B in any mounting direction.

The holding frame 10 has a multi-stage cylindrical shape as a whole, and includes a large-diameter cylindrical portion 13 as a groove wheel storage portion, and an internal gear 14 continuous to the large-diameter cylindrical portion 13 and formed on the inner circumferential surface to form a planetary gear bogie, which will be described later. A small-diameter cylindrical portion 15 as a deceleration mechanism housing portion in which 32 and 34 are disposed, and an opening edge of this small-diameter cylindrical portion 15 are formed to protrude outward, and the holding frame 1
It consists of a shaft bearing part 16 which bearings the output end part 34B of the speed reduction mechanism which projects from 0.

A groove wheel 20 having a sun gear 23 formed at one shaft end is disposed in the large-diameter cylindrical portion 13 within this holding frame 10.

The groove wheel 20 consists of a groove wheel body 22 formed by fitting two disks 21 together, and a groove wheel shaft 24 having a sun gear 23 formed on a part of its circumference. The fitting groove 25A formed in 25 and the groove axle 2
The grooved axle shaft 24 is formed by being inserted into the grooved wheel main body 22 so that the fitting protrusion 24A formed on the circumferential surface of the grooved wheel body 24 is fitted. Further, at the shaft end of the grooved axle shaft 24 where the sun gear 23 is formed, a shaft support hole 3 is formed along the axis of an output planetary gear truck 34, which will be described later.
A support rod 26 is provided to be inserted into 4C.

Therefore, the groove wheel 20 is pivotally supported by the shaft support hole 6 of the bracket 3B and the shaft support hole 34C formed along the axis of the output planetary gear truck 34, and the holding frame 10
It is located within the

The speed reduction mechanism 30 includes an internal gear 14 formed on the inner surface of the small diameter cylindrical portion 15 of the holding frame 10, a sun gear 23 formed at the end of the groove wheel 20, and these internal gears 1.
4. A planetary gear 31 that meshes with the sun gear 23, a disk 32A that supports the planetary gear 31 with a plurality of shafts, and a sun gear 32 that is formed continuously with the disk 32A.
A disk 34A on which an intermediate planetary gear truck 32 consisting of each B, a sun gear 32B of this intermediate planetary gear truck 32, and a planetary gear 33 meshing with each of the internal gears 14 are pivotally supported, and a disk 34A is formed continuously on this disk 34A. Output planetary gear truck 3 consisting of output end portions 34B, respectively.
It consists of 4. In addition, the intermediate planetary gear truck 3
Although only one number 3 is provided in the illustrated example, the number is not limited to this, and it goes without saying that the number may be increased or decreased as appropriate depending on the required reduction ratio.

The intermediate planetary gear truck 32 is disposed so as to be fitted onto the support rod 26 of the grooved axle 24 . Further, the output planetary gear truck 34 is supported at its substantially central portion by the shaft bearing portion 16 of the holding frame 10 via a bush 35 . The output end 34B of the output planetary gear truck 34 has a rectangular cross section, and the output end 34B has the engagement groove 5 of the shaft support 2B on the circumferential surface.
An engagement disk 40 having a protruding hemispherical engagement protrusion 41 that matches the shape of the engagement disk 40 is fixed by an E-ring 42 or the like.

Further, within the holding frame 10, a brake part 50 is disposed coaxially with the groove wheel 20 between the stepped part 17 between the large diameter cylindrical part 13 and the small diameter cylindrical part 15, and one side surface of the groove wheel 20. has been done.

The brake part 50 is constructed by cutting substantially L-shaped cutting lines radially from the peripheral edge of a disc-shaped brake disc 51 and setting these cutting lines as the end edges, so that the pressure welding piece 5
2 and is in contact with the inner wall of the stepped portion 17.
3 and a disk 54 that is in contact with the side surface of the groove wheel 20. Therefore, this brake disc 51
A constant load is always applied by the pressing piece 52 to brake the rotation of the groove wheel 20.

On the other hand, a groove wheel 20 is provided on a part of the peripheral wall of the large diameter cylindrical portion 13.
The operating string 6 is half-wound through the anti-slip means 61.
A pair of insertion grooves 18 are formed to suspend a loop-shaped operating string 60 outside the holding frame 10. The operating string 60 is not limited in form, such as a braided cord shape as shown in the figure, a bead chain shape or a rope shape (not shown), etc.
Any material may be used as long as it is flexible and strong, can be flexibly wound around the groove wheel 20, is circulated by pulling the operating string 60 with the operator's fingers, and can reliably rotate the groove wheel 20. Anti-slip means 61 for that purpose
The figure shows an example in which protrusions are alternately provided on both wall surfaces of the groove of the groove wheel 20 at equal intervals along the groove direction, and the operating string 60 is gripped from both sides by the protrusion surfaces. In addition, according to such a protrusion, there is a case 1 in which the operating string 60 is in the form of a bead chain.
It also has the advantage of being able to reliably grip each piece. Of course, the anti-slip means 61 may be formed on the groove wheel 20 itself or the operating string 60 itself, or may be obtained by a combination of both 20 and 60, and its structure can be designed arbitrarily.

This device is constructed as described above, and by pulling and circulating the loop-shaped operating string 60, the groove wheel 20 is rotated in the normal direction while being constantly braked with a constant braking force by the brake disc 51. or reversed,
The planetary gear 31 that meshes with the sun gear 23 of the groove wheel 20 also meshes with the internal gear 14, so it goes around the periphery of the sun gear 23 while rotating.Therefore, the planetary gear carts 32 and 34 are rotated at reduced speed. It will be done. An engagement disk 40 is fixed to the output end 34B of the planetary gear truck 34.
0 engages with the screen shaft 1 through the engagement protrusion 41 and the engagement groove 5, and the rotation of the groove wheel 20 is decelerated and transmitted to the screen shaft 1, whereby the roll screen S is rolled in and unwound. It can be performed.

At this time, since the pressure contact piece 52 of the brake disc 51 attached coaxially with the groove wheel 20 is always elastically pressed against the side surface of the groove wheel 20, the rotation of the groove wheel 20 itself is constantly braked due to the elastic load. Ru. Therefore, the groove wheel 20 does not rotate in a free state, and even if the screen S is wound around the screen shaft 1 and the hanging load is reduced, the screen S is unwound from the screen shaft 1 and suspended. Even if the hanging load becomes large, the groove wheel 20 is rotated by a substantially constant load that is always averaged, so that the operating force of the operating string 60 is also constant and can be operated smoothly. Not only that, even if the winding-in and unwinding of the screen S is stopped midway, due to the braking action of the brake disc 51, the planetary gears 31, 33, the sun gear 32
B, together with the fact that the internal gears 14 are in mesh with each other, the suspended load is not transmitted to the groove wheel 20, and the screen S is reliably stopped.

In addition, if an external force exceeding the limit is applied to the output end 34B, that is, the screen S, the entire internal mechanism will slip and rotate in the direction of the applied load. S is paid out by the amount of the load, and damage and breakage of the screen S can be prevented.

In addition, since the groove wheel 20, which can be rotated forward and backward, is supported concentrically with the center of the screen shaft 1 on the bracket 3B arranged at the end of the screen shaft 1, the winding efficiency is improved and the screen shaft 1 is prevented from wobbling. It can be rolled in and rolled out smoothly without any problems. Then, the holding frame 10 that holds the groove wheel 20 inside is attached to the bracket 3.
B, the holding frame 10 has a multi-stage cylindrical shape with stepped parts, holds the groove wheel 20 in its large diameter cylinder part 13, and connects the planetary gear reduction mechanism 30 connected to the groove wheel 20 to its small diameter cylinder. The output end 34B of the planetary gear reduction mechanism 30 protrudes from the opening edge of the small diameter cylindrical part 15, and the output end 34B
, an engagement groove 5 in the engagement hole 4 which has a diameter larger than the outer circumferential surface of the small diameter cylindrical portion 15 and is opened at the end of the screen shaft 1 on the circumferential surface.
Since the engagement disc 40 having the engagement protrusion 41 that engages with the screen is fixed, and the small diameter cylindrical portion 15 of the holding frame 10 is fitted into the engagement hole 4 at the end of the screen shaft 1, the screen has a conventional speed reduction mechanism. Compared to a winding device, it requires less installation space and improves the appearance of the device, and not only does it not spoil the aesthetics of the room where it is installed.
Maximizes the screen width that can be installed.

Furthermore, since it is a planetary gear reduction mechanism 30, it is possible to make the entire device compact, and it is also possible to easily obtain a large reduction ratio despite being compact.

At the output end 34B of the planetary gear reduction mechanism 30,
This is because an engaging disk 40 is fixed, which has a larger diameter than the outer circumferential surface of the small diameter cylindrical portion 15 and has an engaging protrusion 41 on the circumferential surface that engages with the engaging groove 5 in the engaging hole 4 opened at the end of the screen shaft 1. , when fitting the small-diameter cylindrical portion 15 having the engagement disk 40 into the engagement hole 4 of the screen shaft 1, a large degree of freedom is achieved, i.e., the screen shaft 1 with respect to the winding device
A large swing angle can be obtained, making it extremely easy to install the roll screen shaft 1 in the winding device according to this invention or to replace the roll screen shaft 1.

In addition, by arranging a print motor (not shown) in the holding frame 10 instead of the groove wheel 20, an automatic winding device such as a roll screen can be provided in a compact form. Since there is no need to provide an operating string 60, etc., the entire winding device can be housed in the engagement hole 4 at one end of the screen shaft, making the overall configuration compact, reducing installation space, and improving aesthetics. .

As explained above, according to this invention, the screen shaft of the roll screen, etc. can be manually rotated in the forward and reverse directions by pulling the operation string, and the roll screen, etc. can be smoothly rolled in and unwound. It is extremely convenient because it can be operated with a constant operating force at all times without being affected by the changing hanging load of the screen during winding and unwinding, and furthermore, the whole system can be compacted and installed easily. This has extremely beneficial effects in practical terms, such as not detracting from the aesthetic appearance of the room, etc.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is an overall vertical cross-sectional view, and Figure 2 is the − of Figure 1.
3 is a partially omitted line sectional view of FIG. 1, FIG. 4 is a sectional view of FIG. It is a partially cutaway front view shown. S... Roll screen, 1... Screen shaft, 2A, 2B... Shaft support body, 3A, 3B... Bracket, 4... Engagement hole, 5... Engagement groove, 6... Shaft support hole, 7 ...Mounting hole, 10...Holding frame, 11...
Mounting screw, 12...Mounting hole, 13...Large diameter cylinder part,
14...Internal gear, 15...Small diameter cylinder part, 16...Bearing part, 17...Step part, 18...Insertion groove, 20...
Grooving wheel, 21...disc, 22...grooving wheel body, 23...
...Sun gear, 24...Groove axle, 24A...Fitting protrusion, 25...Shaft hole, 25A...Fitting groove, 26...
Support rod, 30... Reduction mechanism, 31... Planetary gear,
32... Intermediate planetary gear truck, 32A... Disc, 3
2B...Sun gear, 33...Planetary gear, 34...
Output planetary gear truck, 34A...Disc, 34B...
Output end, 34C... Pivot support hole, 35... Bush, 40... Engagement disc, 41... Engagement protrusion, 42
... E ring, 50 ... Brake part, 51 ... Brake disk, 52 ... Pressure contact piece, 53, 54 ... Disk, 60 ... Operation string, 61 ... Anti-slip means.

Claims (1)

[Scope of utility model registration request] A groove wheel capable of forward and reverse rotation is supported concentrically with the axis of the screen on a bracket placed at the end of the screen shaft of a required roll screen, etc., and a holding frame for holding this groove wheel inside is fixed to the bracket. The holding frame has a multi-stage cylindrical shape with stepped parts, holds the groove wheel in its large diameter cylinder part, and has a planetary gear reduction mechanism connected to the groove wheel disposed in its small diameter cylinder part. The output end of the planetary gear reduction mechanism protrudes from the open end of the cylindrical portion, and an engagement hole is provided at the output end that has a larger diameter than the outer circumferential surface of the small diameter cylindrical portion and is opened at the screen shaft end on the circumferential surface. An engagement disk having an engagement protrusion that engages with the groove is fixed, and a brake is provided on the groove wheel and the inner surface of the holding frame opposite to the side surface of the groove wheel for constantly elastically pressing the side surface of the groove wheel against the bracket surface. A manual winding system for use in roll screens, etc., characterized in that a panel is provided, a loop-shaped operating string is wound around the groove wheel, and a small-diameter cylindrical portion of the holding frame is fitted into an engagement hole at the end of the screen shaft. Device.