JP2637268B2 - Screen lifting device for continuous roll blind - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device for elevating and lowering a screen of a continuous roll blind.

[Conventional technology]

As a conventional roll blind, there is a roll blind in which two winding shafts are connected in parallel to suspend and support a thin screen on the indoor side and a thick screen on the outdoor side. Further, the two winding shafts are arranged to be offset in the front-back direction, so that the two screens do not interfere with each other. As shown in FIG. 7, a pulley 63, 64 is provided at one end of each winding shaft 61, 62 as one type of a lifting device for lifting and lowering the roll blind, and an endless shaft mounted on each of the pulleys 63, 64 is provided. By operating each of the pulleys 63 and 64 by operating the operation codes 65 and 66 individually, the winding shafts 61 and 62 are rotated to move the screens 67 and 68 up and down, and At the time of operation, each screen 6 is controlled by a self-weight drop prevention device (not shown) provided in each winding shaft 61, 62.
In some cases, 7,68 can be suspended and supported at a desired position.

[Problems to be solved by the invention]

However, in the lifting device as described above, the screen 6
Since the two operation codes 65 and 66 overlap and hang down one side of 7,68, there is a problem that the appearance is not good. Also, since the two operation codes 65 and 66 are hung at substantially the same position, when operating one operation code, the other operation code is in the way,
It is very difficult to raise and lower the 67, 68, and when operating the desired screen 67, 68,
There is also a problem that it is troublesome to determine which direction should be operated.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an excellent appearance and a desired screen by enabling each of two winding shafts to be operated by one operation code. An object of the present invention is to provide a screen elevating device of a continuous type roll blind capable of easily performing an elevating operation.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, two take-up shafts for suspending and supporting the screen are supported in a parallel and rotatable manner by a pair of support brackets. The output shaft is rotatably supported so as to be located at one end, and an operation device operated by one endless operation code is provided on one support bracket, and the operation device is provided in one direction of the operation code. A first selection driving means for rotating only one output shaft in the screen lowering direction in accordance with the lowering operation to the screen, and rotating only the other output shaft in the screen lowering direction in accordance with the lowering operation in the other direction of the operation code. A rotating force applying means for applying a rotating force in the screen ascending direction to each of the winding shafts, and a supporting bracket is always provided between each of the winding shafts and one of the support brackets. Rotation preventing means for preventing rotation of the winding shaft with respect to the load shaft, and second selection driving means for operating the rotation preventing means based on the rotation of the output shaft, the second selection driving means comprising an operation code When the output shafts are rotated in the screen lowering direction in accordance with the pulling-down operation, the first operation means for releasing the rotation prevention state of each winding shaft by the rotation preventing means and transmitting the rotation of the output shaft to the winding shaft. Then, based on the operation of pulling down the operation code in the same direction following the lowering operation, the rotation preventing state of each winding shaft by the rotation preventing means is released, and the winding shaft is rotated in the screen ascending direction by the rotating force applying means. And a second operating means.

[Action]

Therefore, in the present invention, when raising or lowering one screen, when one endless operation code is pulled down in one direction, only one output shaft is moved in the screen lowering direction by the first selection drive means. Rotated to When the output shaft is rotated in the screen lowering direction, the rotation preventing state of the winding shaft by the rotation preventing means is released by the first operating means of the second selection driving means, and the rotation of the output shaft is transmitted to the winding shaft. Is transmitted. Therefore, only one winding shaft is rotated in the screen lowering direction, and the screen is rolled down.

When the lowering operation of the operation cord is stopped after the screen is rolled down to the desired position, the rotation of the winding shaft with respect to the support bracket is blocked by the rotation preventing means, and the screen is held at the desired rolled-down position.

In this state, when the operation code is pulled down in the same direction as the pulling-down direction, only one output shaft is rotated in the screen lowering direction in the same manner as described above. Along with this,
By the second actuation means in the second selection drive means,
The rotation blocking state of the winding shaft by the rotation preventing means is released, and the winding shaft is rotated in the screen ascending direction by the rotating force applying means, and the screen is wound up.

Further, when raising or lowering another screen, when the operation code is pulled down in the opposite direction, only the other output shaft is rotated in the screen lowering direction. Therefore,
The lowering and raising of the other screen can be performed by the operation of lowering the operation cord in the opposite direction to the above and the subsequent lowering operation.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
Description will be made with reference to the drawings.

In the roll blind shown in FIG. 2, a pair of support brackets 1 and 2 are fixed to an upper frame of a window and the like, and two winding shafts 3 and 4 are rotatably supported between the support brackets 1 and 2, respectively. Screens 5, 6 made of cloth or the like are suspended from the winding shafts 3, 4, respectively. The screens 5, 6 are raised and lowered by the rotation of the winding shafts 3, 4. An operation device 7 is provided on one of the support brackets 1, and one endless operation code 8 is hung from the operation device 7. And
Inside the one end of each of the winding shafts 3 and 4 near the operating device 7, clutch devices 9 and 10 for controlling the rotation of the winding shafts 3 and 4 based on the operation of the operation cord 8 are built. Further, to the inside of the other end of each of the winding shafts 3 and 4, torsion coil springs 11 and 12 as rotating force applying means are arranged, and one end thereof is fixed to the winding shafts 3 and 4 via wind plugs 13 and 14. The other end is fixed to the support bracket 2 via support members 15 and 16. When the winding shafts 3 and 4 are rotated in the screen 5 and 6 descending directions, the torsion coil springs 11 and 12 are accumulated, and the accumulated forces cause the winding shafts 3 and 4 to move the screens 5 and 6 in the lifting direction. A rotational force is applied.

Next, the detailed structure of the operating device 7 will be described. As shown in FIG.
7, 7 and 18 have their tip portions 17a and 18a formed in a square shaft shape. Further, square holes 19a, 20a are provided in the axes of the two support shafts 19, 20 formed integrally with the support bracket 1, and the tip portions 17a, 17a of the support shafts 17, 18 are provided in the square holes 19a, 20a.
18a is fitted non-rotatably. Also, each support shaft 1
Output shafts 21 and 22 are rotatably supported on 9, 20 and each output shaft 2
As shown in FIG. 3, clutch springs 23 and 24 which are wound in opposite directions are fitted to the leading ends of the first and second clutches 22, 22, respectively. Then, one end 23a, 24a of each clutch spring 23, 24
Is curved in an arc shape. Each clutch spring 23,2
4 constitutes a first selective driving means. Also, each output shaft 2
Gears 25, 26 are rotatably supported by 1, 22 and each gear 25, 26
The inner peripheral surface on the distal end side is located around each of the clutch springs 23, 24, and locking projections 25a, 26a are formed at one location on the inner peripheral surface on the distal end side. Then, the gears 25 and 26 are rotated in the respective screens 5 and 6 descending directions, that is, the directions of arrows F and I shown in FIG.
When 26a abuts against the ends 23a and 24a of the clutch springs 23 and 24, the clutch springs 23 and 24 are firmly pressed against the outer peripheral surfaces of the output shafts 21 and 22 to reduce the diameter, and the gears 25 and 24 are pressed.
The output shafts 21 and 22 rotate around the support shafts 19 and 20 together with 26. Further, the gears 25, 26 are rotated in the upward direction of the respective screens 5, 6, that is, in the directions of arrows G, H shown in FIG. When the clutch springs 23 and 24 abut on each other, the clutch springs 23 and 24 are expanded in diameter and the frictional force with each of the output shafts 21 and 22 is reduced. , 22. Therefore, the two output shafts 21 and 22 do not rotate in the same direction.

As shown in FIGS. 1 and 3, a pulley shaft 27 is formed integrally with the support bracket 1, and a pulley 28 is rotatably supported on the pulley shaft 27. The operation code 8 hangs down from the pulley 28, and the pulley 28 is rotated by operating the operation code 8. A drive gear 29 is integrally provided on one side of the pulley 28, and the drive gear 29 meshes with the two gears 25 and 26. Then, the rotation of the drive gear 29 is changed to the two gears 25, 2
6 to be transmitted.

Next, a detailed structure of the clutch device 9 provided inside the winding shaft 3 will be described. The other clutch device 10,
That is, the clutch device 10 provided inside the winding shaft 4 has the same configuration as that of the clutch device 9 described later except that the configuration with respect to the rotation direction is the same, and thus the description thereof is omitted.

As shown in FIG. 1, an intermediate portion of the support shaft 17 is formed in a round shaft shape, and a cylindrical clutch case 31 is rotatably mounted on a flange 30 provided at the intermediate portion in the axial direction of the support shaft 17. It is immovably supported. And the clutch case 31
The output shaft 21 is non-rotatably fitted into the tip of the clutch case 31, and the clutch case 31 is rotated integrally with the output shaft 21. A first clutch drum 32 as first operating means is provided inside the clutch case 31, and the first clutch drum 32 is
Is rotatably supported at an intermediate portion of the head. A coil spring 33 is disposed in the clutch case 31. Both ends of the coil spring 33 are bent in a direction along the support shaft 17, and one end is inserted into a hole 31a formed in the clutch case 31. It is supported, and the other end is inserted and supported in a hole 32a formed at the tip of the first clutch drum 32. As shown in FIGS. 5 and 6, a second clutch drum 35 as a second operating means is disposed around the base end portion 34 of the first clutch drum 32. Further, two projecting pieces 34a, 34b are provided at a predetermined angle on the outer peripheral surface of the base end portion 34 of the first clutch drum 32, and the tip end portion 36 of the second clutch drum 35 is partially cut off. The edges are the protruding pieces 34 as the contact parts 36a and 36b.
a, 34b are located on both sides.

As shown in FIGS. 1 and 5, a slide groove 37 having a semicircular cross section is formed in the inner peripheral surface of the clutch case 31 in the axial direction. A first guide groove 38a having a semicircular cross section is also formed on the outer peripheral surface of the first clutch drum 32, and a tip end portion 36 of the second clutch drum 35 is partially cut away to form the first guide groove 38a. A second guide 38b communicating with the second guide 38b is formed. An endless guide groove 38 is formed by the first guide groove 38a and the second guide groove 38b, and a clutch ball 39 is disposed between the guide groove 38 and the slide groove 37. When the clutch case 31 rotates, the clutch ball 39 moves in the endless guide groove 38 while moving in the slide groove 37 in the left-right direction in FIG.

When the guide groove 38 is described in the unfolded state shown in FIG. 6, a pull-down groove 40 extends in the circumferential direction on the distal end side of the first clutch drum 32, and both ends thereof are curved toward the base end side of the first clutch drum 32. ing. The first return groove 41 connected to the end point 40a of the pull-down groove 40 extends in the circumferential direction of the first clutch drum 32, and then extends obliquely to the base end side of the first clutch drum 32. The pull-up groove 42 connected to the end point 41a of the first return groove 41 extends obliquely to the base end side of the first clutch drum 32 and communicates with the second guide groove 38b of the second clutch drum 35. The second return groove 43 communicating with the end point 42a of the pull-up groove 42 extends in the circumferential direction of the second clutch drum 35, and then extends obliquely to the distal end side of the second clutch drum 35 to extend the first clutch drum 32 And the end point 43a of the first guide groove 38a.
Communicates with the end of the pull-down groove 40. The first clutch drum 32 is housed in the clutch case 31 in a state where the diameter of the coil spring 33 is reduced, and the coil spring 33 is moved in the direction of increasing the diameter, that is, in the direction of the arrow M shown in FIG. In order to rotate the clutch ball 39, the clutch ball 39 is always located at the end point 41a of the first return groove 41 or the end point 43a of the second return groove 43.

As shown in FIG. 1, a brake drum 44 is rotatably supported at an intermediate portion of the support shaft 17, and a brake carrier 45 is rotatably supported inside the brake drum 44. As shown in FIG. 4, the distal end portion of the brake carrier 45 is partially cut to form an edge portion 45c, and the first drive piece 46 provided at the proximal end portion 34 of the first clutch drum 32 is used. It protrudes from the cut part. A stop spring 47 constituting a rotation preventing means is fitted to an intermediate portion of the support shaft 17, and its ends 47a and 47b are bent outward. A locking groove 45a is formed on the inner peripheral surface of the tip of the brake carrier 45.
Are formed in the axial direction, and the first clutch drum 32
The first driving piece 46 also has a locking groove 46a formed in the axial direction, and the locking grooves 45a, 45b have ends 47a, 4
7b are fitted respectively. When a rotational force is applied to the first clutch drum 32 in the downward direction of the screen 5, that is, in the direction of arrow J shown in FIG.
The diameter of 47 is increased so that the frictional force with the support shaft 17 is reduced, and the stop spring 47 is rotated with respect to the support shaft 17 together with the first clutch drum 32.

Also, when a rotational force in the downward direction of the screen 5 acts on the brake carrier 45, the stop spring 47 is reduced in diameter and the frictional force with the support shaft 17 is increased, so that the stop spring 47 is firmly pressed against the outer peripheral surface of the support shaft 17. Has become. The stop spring 47 is set so as not to be expanded by the rotational force of the winding shaft 3 in the ascending direction of the screen 5 based on the accumulated force of the torsion coil spring 11 in the direction of arrow K shown in FIG. ing.

As shown in FIGS. 1 and 4, a brake spring 48 constituting rotation preventing means is fitted on the inner peripheral surface of the brake drum 44, and its ends 48a and 48b are bent inward. A second driving piece 49 is provided at the base end of the second clutch drum 35, and protrudes between the brake spring 48 and the brake carrier 45. A locking groove 45b is formed in the outer peripheral surface of the brake carrier 45 in the axial direction, and a locking groove 49a is formed in the outer surface of the second driving piece 49. One end 48a of the brake spring 48 is fitted in the locking groove 45b of the brake carrier 45, and the other end 48b is located in the locking groove 49a of the second driving piece 49. Then, as shown by a chain line in FIG. 4, the second shaft clutch drum 35 is rotated in the downward direction of the screen 5, and the end 48b of the brake spring 48 is pressed by the end of the locking groove 49a of the second drive piece 49. Then, the diameter of the brake spring 48 is reduced, the frictional force with the brake drum 44 is reduced, and the brake drum 44 can rotate with respect to the brake spring 48.

In the present embodiment, the clutch case 31, the first clutch drum 32, the coil spring 33, the second clutch drum 35, the clutch ball 39, and the brake carrier 45 constitute a second selection drive unit.

As shown in FIG. 1, a coil spring 50 is fitted on the outer peripheral surface of the base end of the brake drum 44, and one end thereof is folded outward. Also, an operation cap 51 is provided between the distal end of the clutch case 31 and the proximal end of the brake drum 44.
The operation cap 51 is rotatably supported at the tip end of the clutch case 31 via a bearing 52. The bent end of the coil spring 50 is fixed to the operation cap 51, and the winding shaft 3 is fitted on the outer peripheral surface of the operation cap 51.
In addition, the coil spring 50 allows the operator to directly move the winding shaft 3 in the direction of winding the screen 5, that is, the arrow K shown in FIG.
In order to rotate the brake drum 44 in the direction, the brake drum 44 idles to prevent internal damage.

The operation cap 51 and the operation cap in the winding shaft 4
Known governor devices 54 and 55 are fitted to the distal end of 53, respectively, and the base ends of the support shafts 17 and 18 are inserted into the governor devices 54 and 55. These governors 54, 55 only work when the screens 5, 6 are pulled up at excessive speed,
This is for appropriately controlling the pulling speed.

Next, the operation of the screen elevating device of the continuous roll blind configured as described above will be described.

Now, in order to lower one screen 5 of the continuous roll blind, the clutch ball 39 of the clutch device 9 of the winding shaft 3 disposed on the lower side in FIG. When the pulley 28 is rotated in the direction of arrow D shown in FIG. 3 by operating the operation cord 8 in the state of being located at the portion 43a, one gear 25
, And the other gear 26 is rotated in the direction of arrow H. At this time, the locking ridge 25a of the one gear 25 contacts the end 23a of the clutch spring 23, and the clutch spring 23
Is rotated around the support shaft 19 together with the output shaft 21 in order to reduce the diameter, the locking ridge 26a of the other gear 26 abuts on the end 24a of the clutch spring 24, and the clutch spring 24 is expanded in diameter. Therefore, it rotates around the output shaft 22 together with the gear 26. Then, the clutch case 31 and the one output shaft 21 are pressed against
The clutch ball 39 is rotated in the direction of arrow J shown in the figure, and the clutch ball 39 moves in the downward groove 40 in the direction of arrow L shown in FIG. Then, the rotation of the clutch case 31 is transmitted to the first clutch drum 32 via the clutch ball 39, the stop spring 47 is expanded in diameter, and the support shaft 17 is moved together with the first clutch drum 32.
Rotate around. Then, the first driving piece 46 of the first clutch drum 32 presses the edge portion 45c of the brake carrier 45 to rotate the brake carrier 45, whereby the diameter of the brake spring 48 is increased. Are also rotated together. Therefore, the winding shaft 3 is rotated via the operation cap 51, and the screen 5 is lowered. At this time, the torsion coil spring 11 is
Is charged by the rotation of.

When the operation code 8 is released after the screen 5 has been lowered to the desired position, the clutch case 31 rotates in the direction of arrow M shown in FIG. The ball 39 passes through the first return groove 41 and abuts on its end point 41a. Further, the winding shaft 3 tends to rotate in the winding direction of the screen 5 by the accumulated force of the torsion coil spring 11, but since the rotating force is smaller than the force required for expanding the diameter of the stop spring 47, the operation code 8 Is released, the winding shaft 3 does not rotate, and the screen 5 is suspended and supported at the lowered position.

From this state, pull down the operation code 8 slightly and pulley 28
Is rotated in the direction of arrow D shown in FIG. 3 in the same manner as described above, and only one output shaft 21 rotates in the direction of arrow F.
Is rotated in the direction of arrow J shown in FIG. 4 against the urging force of
The clutch ball 39 passes through the pulling groove 42 and abuts on its end point 42a as shown by the chain line in FIG. Then, the rotation of the clutch case 31 is transmitted to the second clutch drum 35 via the clutch ball 39, and as shown by a chain line in FIG. Is pressed. This pressing causes the brake spring 48 to rotate in the downward direction of the screen 5, and the rotational force is transmitted to the brake carrier 45 via the end 48 a of the brake spring 48, whereby the support shaft 17 and the stop spring The friction force with 47 increases, and the brake carrier 45 is firmly fixed to the support shaft 17. Then, the end 48 of the brake spring 48
When the other end 48b is further pressed while a is fixed to the brake carrier 45, the brake spring 48 is reduced in diameter and the frictional force with the brake drum 44 is reduced, and the brake drum 44 is Can be rotated. Accordingly, the winding shaft 3 is rotated by the energy stored in the torsion coil spring 11 and the screen 5 is wound up. At this time, if the screen 5 is wound up at an excessive speed, the winding speed can be appropriately suppressed by the governor device 54 provided inside the winding shaft 3.

When the operation code 8 is released after the screen 5 has been raised to the desired position, the clutch case 31 rotates in the direction of arrow M shown in FIG. Clutch ball
39 touches the end point 43a through the second return groove 43, and the screen 5 is suspended and supported at that position as described above. Then, the operation code 8 is operated to pull the pulley 28 into the third position.
When the clutch ball 39 is rotated in the direction of the arrow D shown in the figure, the clutch ball 39 passes through the pull-down groove 40 and abuts on its end point 40a as shown by a solid line in FIG. Can be.

To raise and lower the other screen 6, the operation code 8 is operated to rotate the pulley 28 in the opposite direction, that is, in the direction of arrow E shown in FIG. It is only necessary to transmit the rotation of.

As described above, this lifting device has two screens 5, 6
Without using two operation codes 8,
Since the operation can be performed with a single operation code 8, there is no risk of deteriorating the aesthetic appearance, and the appearance is improved.
Then, the one operation code 8 is lowered in one direction, the subsequent lowering operation in the same direction, the operation code 8 is lowered in the other direction, and the subsequent lowering operation is performed in the same direction. Since the two screens 5, 6 can be moved up and down by the lowering operation, there is almost no complexity in selecting the operation code 8 when moving the desired screen 5, 6 up and down, and the operability is very good. It is possible to raise the screens 5 and 6 only by slightly lowering the screen 8, so that the operation of winding the screens 5 and 6 can be performed very easily.

〔The invention's effect〕

As described above in detail, according to the present invention, two screens can be moved up and down by one endless operation code, so that the appearance can be improved and the desired screen can be easily moved up and down. Demonstrates excellent effects.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of an essential part showing an embodiment of a screen elevating device embodying the present invention, FIG. 2 is a partially cutaway front view showing the entire continuous type roll blind, and FIG. FIG. 4 is a sectional view taken along the line AA of FIG.
5, FIG. 5 is a sectional view taken along the line CC in FIG. 1, FIG. 6 is a developed view of a guide groove, and FIG. 7 is a front view of a conventional continuous-type roll blind. Support brackets 1, 2, winding shafts 3, 4, screens 5, 6, operating device 7, operating cord 8, torsion coil springs (rotational force applying means) 11, 12, output shafts 21, 22, clutch spring (first Drive means) 23, 24, clutch case (second selection drive means) 31, first clutch drum (second selection drive means, first operating means) 32, coil spring (second selection drive means) 33), second clutch drum (second selection driving means, second operating means), 35, clutch ball (second selection driving means) 39, brake carrier (second selection driving means) 45, stop spring (Rotation preventing means) 47, brake spring (rotation preventing means) 48.

Claims (1)

(57) [Claims] 1. A pair of support brackets (1, 2) rotatably support two winding shafts (3, 4) for suspending and supporting a screen (5, 6). The output shafts (21, 22) are rotatably supported on the bracket (1) so as to be positioned at one end of each of the winding shafts (3, 4). An operation device (7) operated by an endless operation code (8) is provided, and the operation device (7) moves only one of the output shafts in the screen descending direction in accordance with the operation code (8) being lowered in one direction. And a first selection drive means (23, 24) for rotating only the other output shaft in the screen lowering direction in response to the operation code (8) being lowered in the other direction. In (3, 4), there is provided a rotating force applying means for applying a rotating force in a screen ascending direction to each winding shaft (3, 4). (1
1,12), and between each winding shaft (3,4) and one support bracket (1), the rotation of the winding shaft (3,4) with respect to the support bracket (1,2) is always maintained. Rotation preventing means (47, 48) for preventing rotation, and rotation preventing means (47, 4) based on rotation of the output shaft (21, 22).
8) operating the second selection driving means (31, 32, 33, 35, 39,
45), and the second selection drive means (31, 32, 33, 35, 39, 45) is provided with each output shaft (21, 22) as the operation code (8) is lowered.
When the is rotated in the screen lowering direction, the rotation blocking state of the respective winding shafts (3, 4) by the rotation blocking means (47, 48) is released, and the rotation of the output shafts (21, 22) is reduced. Based on the first actuating means (32) transmitting to the third and fourth) and the lowering operation of the operation code (8) in the same direction following the lowering operation, each of the winding shafts (47, 48) by the rotation preventing means (47, 48). A second actuating means (35) for releasing the rotation blocking state of (3, 4) and rotating the winding shaft (3, 4) in the screen ascending direction by the rotational force applying means (11, 12). A screen raising / lowering device for a continuous roll blind, characterized in that: