JP3359746B2 - Roll screen screen stop device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen stopping device for a roll screen.

[0002]

2. Description of the Related Art As a conventional screen stopping device for a roll screen, there is the following device. That is, in the case of a chain type roll screen, the screen is raised and lowered by operating a ball chain having a reverse winding prevention connector attached to an appropriate position thereof to rotate the pulley. Specifically, the screen raising operation is performed by continuously pulling one side of the ball chain to continuously rotate the pulley and wind the screen around the winding pipe. The stop of the screen when completely raised and the stop of the screen in the middle of ascending and descending are performed by stopping the operation of the ball chain. That is, by stopping the operation of the ball chain, the rotation of the pulley is stopped, the winding pipe is slightly rotated in the screen unwinding direction by the weight of the screen or the like, and the rotation of the winding pipe is restrained by the clutch spring. It is performed by The lowering operation of the screen is performed by continuously pulling the other side of the ball chain to rotate the pulley and unwind the screen from the winding pipe. When the screen is lowered to the lowermost position, the reverse winding prevention connector is hooked on the pulley, the rotation of the pulley is restrained, and the screen stops. As a result, the ball chain continues to be pulled even though the screen has been lowered to the lowest position, as in the case where the reverse winding prevention connector is not attached to the ball chain, and the winding pipe continues to rotate, It is possible to prevent the screen from being wound around the take-up pipe in the reverse direction.

[0003]

However, in the above-described conventional screen stopping device for a roll screen, since the reverse winding prevention connector is attached to the ball chain, there is a problem that the appearance of the ball chain is poor. As a solution to this problem, Jitsuhei 6-559
There is one shown in Japanese Patent Publication No. The screen stop device of the roll screen shown here is a fixed shaft fixed to the side plate, a bolt shaft provided on an extension of the fixed shaft, and a winding pipe rotatably screwed into the bolt shaft. It is composed of an integrally rotating top and a coil spring fixed at a predetermined position on the bolt shaft. In this screen stopping device, when the screen is lifted and lowered, it rotates integrally with the take-up pipe, moves on the bolt axis in the direction of the coil spring, and when the movement is regulated by the coil spring, the screen stops. The lift is configured to stop. Thereby, the appearance of the ball chain is improved. However, in this case,
In order to set the upper and lower limit positions of the screen, it is necessary to remove the screen stopping device from the winding pipe one by one.
The present invention has been made to solve the above problems.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a fixing member.
Therefore, the main shaft is supported by the side plate so as to be switchable between a rotatable state and a non-rotatable state, and a bolt shaft is integrally connected to the main shaft. The nut member is screwed so as to be movable in the axial direction so as to be regulated, and the nut member and the winding pipe are connected so as to rotate integrally.By the action of the clutch spring, the nut member and the winding pipe are rotated by the rotating force from the winding pipe. The above object is achieved by fastening the main shaft and releasing the connection between the winding pipe and the main shaft by the rotational force from the pulley and rotating the pulley and the winding pipe integrally. That is, the screen stopping device for a roll screen according to the present invention is configured such that one end of the screen (58) is wound and unwound on a winding pipe (14) whose both ends are rotatably supported by a side plate (48). A pulley (32) that is rotatably connected to and rotatably drives the winding pipe (14);
And a screen stop device for a roll screen having
In (12) , the pulley (32) is rotatably supported, and one end is supported by the side plate (48) so as to be switchable between a rotatable state and a non-rotatable state. A bolt shaft (16) integrally connected to the other end of the main shaft (38);
A nut member (18) screwed into the screw portion (16a) of 6) so as to be movable in the axial direction, and connected to the winding pipe (14) so as to be integrally rotatable ;
(16), a predetermined amount of nut member (18) or less.
A restricting portion (16b) for restricting the movement in the upper axial direction;
Springs (30, 31) acting to release the connection between the take-up pipe (14) and the main shaft (38) while releasing the connection between the take-up pipe (14) and the main shaft (38). And detachable to side plate (48)
The main shaft (38) is inserted into the side plate (48)
In a state where it cannot be rotated, the side plate (4
8) Can be removed from the main spindle
(38) is rotatable on the side plate (48)
Characterized by chromatic and fixing member (50), the.
In addition, the code | symbol in a parenthesis shows the corresponding member of the Example mentioned later.

[0005]

The lowermost position of the screen is set as follows. First, the screen is completely wound around the winding pipe, and the main shaft is mounted on the side plate while the nut member is kept in contact with the regulating portion of the bolt shaft.
The main shaft is rotatable. Next, release the hand from the winding pipe. Accordingly, a rotating force in the screen unwinding direction is applied to the winding pipe by the weight of the screen or the like. As a result, the take-up pipe is in a state where the main shaft is rotatable.
In addition, since the nut member is in contact with the regulation portion of the bolt shaft, and further movement in the axial direction is regulated,
It starts rotating integrally with the nut member, the bolt shaft and the main shaft. Therefore, the screen is unwound from the winding pipe. After lowering the screen to the desired position,
The lowering of the screen is stopped by holding the winding pipe by hand so that its rotation stops. Next, the spindle is supported by the side plate in a non-rotatable state while holding the winding pipe by hand. Thereby, the lowest position of the screen is set. Therefore, the lowermost position of the screen can be set while the take-up pipe is attached to the side plate, thereby facilitating the setting operation.

[0006] The lifting and lowering of the screen is performed as follows. First, when raising the screen from the set lowermost position, one side of the operation code is pulled down and the pulley is rotated in the screen winding direction. As a result, the clutch spring acts in the fastening release direction to release the fastening between the main shaft and the winding pipe, and the winding pipe rotates integrally with the pulley and winds the screen. At this time, since the nut member rotates with the rotation of the winding pipe, the nut member moves on the bolt shaft in a direction away from the regulating portion. After raising the screen to a desired position, the operation of the operation code is stopped, and the hand is released. Thus, the screen applies a rotating force to the winding pipe in the screen unwinding direction by its own weight. For this reason, the clutch spring acts in the fastening direction, and the winding pipe is fastened to the main shaft, so that its rotation is restricted.
Thereby, the screen stops at the desired position.
Next, when lowering the screen, the other side of the operation cord is pulled down, and the pulley is rotated in the screen unwinding direction. As a result, the clutch spring acts in the fastening release direction to release the fastening between the main shaft and the winding pipe, and the winding pipe rotates integrally with the pulley to unwind the screen. At this time, since the nut member rotates with the rotation of the winding pipe, the nut member moves on the bolt shaft toward the regulating portion. Once the nut member has moved to a position where it contacts the restricting portion, it cannot move any further, so its rotation is restricted. As a result, the rotation of the winding pipe is also restricted, so that the rotation of the pulley is restricted, and the other side of the operation cord cannot be operated. Therefore, the screen stops at the set lowermost position.
As described above, since the operation cord may be used only for rotating the pulley, it is not necessary to provide a member such as a reverse winding prevention connector for restraining the rotation of the pulley. Therefore, the appearance of the operation code is improved.

[0007]

FIG. 1 is an exploded perspective view of a screen stopping device 12 of a roll screen 10 according to the present invention. The screen stopping device 12 includes a take-up pipe 14, a bolt shaft 16, a moving top (nut member) 18, an E-ring 20, a case 22, a clutch spring receiver 24, and a clutch ring 26.
, Two washers 28 and 29, two clutch springs 30 and 31, a pulley 32, and a bearing collar 3.
4, bearing 36, main shaft 38, pulley cover 4
0, a support member 42, a hook 44, a spring 46, a side plate 48, a fixing member 50, and a plate cover 52. The winding pipe 14 has three ridges 14a formed on the inner peripheral surface thereof at predetermined intervals in the circumferential direction. The bolt shaft 16 has a flange-shaped restricting portion 16b having a diameter larger than that of the screw portion 16a at one end thereof, and a hexagonal hole 16c formed at a shaft center at the other end thereof. ing. The movable top 18 is provided on the outer peripheral surface thereof so that it can be fitted to the ridge 14 a of the winding pipe 14.
Each of the grooves 18a is formed, and a female threaded portion 18b that can be screwed into the bolt shaft 16 is formed in the axis of the groove 18a. The case 22 includes an insertion portion 22a that can be inserted into the winding pipe 14, a flange portion 22b formed at one end of the insertion portion 22a and having the same diameter as the outer diameter portion of the winding pipe 14,
have. On the outer peripheral surface of the insertion portion 22a, three groove portions 22e that can be respectively fitted to the protrusions 14a of the winding pipe 14 are formed in the circumferential direction thereof. Collar part 2
A space 22c is formed from the end of 2b to a predetermined position in the axial direction of the insertion portion 22a. On the inner peripheral surface of the space 22c, a protrusion 22f protruding in the inner diameter direction is formed at a predetermined width in the circumferential direction. A small-diameter hole 22d having a smaller diameter than the space 22c penetrates through the axial center of the insertion portion 22a where the space 22c is not formed. The clutch spring receiver 24 has a flange 24a formed at one end thereof, a large-diameter portion 24b formed from the collar 24a to a predetermined position in the axial direction and having a smaller diameter than the collar 24a, and a shoulder portion formed from the large-diameter portion 24b. And a small-diameter portion 24c formed by forming On the outer peripheral surface of the large-diameter portion 24b, a ridge 24d is formed in the axial direction from the end on the side of the flange 24a to a predetermined position in the axial direction. A hexagonal hole 24 e penetrates the shaft center of the clutch spring receiver 24. The clutch ring 26 has a cylindrical shape, and has a slit-shaped notch 26a penetrating in the axial direction at a predetermined position in the circumferential direction. The clutch springs 30 and 31 are formed such that the claws 30a and 31a are formed by bending both ends thereof so as to protrude in the outer radial direction. The pulley 32 is formed with a semi-cylindrical protruding piece 32a that protrudes in the axial direction from one end side of the pulley 32, and has a through hole 32b formed in the axial center portion. Bearing collar 34
The groove portions 34a are formed at six positions on one end side thereof at equal intervals in the circumferential direction. The main shaft 38 has a cylindrical portion 3 having a hexagonal hole 38a formed in a shaft center at one end thereof.
8b, a large hexagonal shaft portion 38c extending concentrically with the cylindrical portion 38b in the axial direction, and a cylindrical portion 38d thinner than the large hexagonal shaft portion 38c extending concentrically from the end of the large hexagonal shaft portion 38c. ,
A small hexagonal shaft portion 38e that is thinner than the cylindrical portion 38d and extends concentrically from the end of the cylindrical portion 38d. The pulley cover 40 has three grooves 40a formed at every 90 degrees in the circumferential direction. In the center of the pulley cover 40, there is formed a hole 40b into which the cylindrical portion 38b of the main shaft 38 can be rotatably fitted. The support member 42 has a substantially inverted "T" -shaped groove 42a formed in the upper part of FIG.
Hole 4 into which the cylindrical portion 38b can be rotatably fitted.
2b is formed. Further, three protrusions 42c are formed on one surface of the support member 42. Hook 44
Has a substantially “T” -shaped shape, and has a concave portion 44 a into which the end of the spring 46 can be inserted. The side plate 48 has a substantially inverted “L” shape, and has a hexagonal hole 48 b in a vertical surface 48 a thereof, a hole 48 c into which the protrusion 42 c of the support member 42 can be fitted, and a spring 46. A protrusion 48d that can be inserted into the end is formed. The fixing member 50 includes a disk-shaped head 50a and a hexagonal shaft 50b that extends in the axial direction from the head 50a. The plate cover 52 is provided on the vertical surface 48 of the side plate 48.
1 has a shape that can be fitted from below in FIG.

FIG. 2 is a partial sectional view of the roll screen 10 on the side where the screen stopping device 12 is provided. The side plates 48 are attached to both ends of a set frame 54 for attaching the roll screen 10 to a window frame (not shown) (the left side end plate in FIG. 2 is not shown). The support member 42 is attached to the side plate 48 with its projection 42c fitted into the hole 48c of the side plate 48, respectively. The hook 44 is fitted in the inverted "T" -shaped groove 42a of the support member 42 so as to be swingable in the left-right direction in FIG. One end of the spring 46 has a concave portion 44 a of the hook 44.
And a side plate 4 at the other end.
Eight convex portions 48 d are inserted and disposed between the hooks 44 and the side plates 48. Thereby, the spring 4
6 always presses the hook 44 to the left in FIG.
The pulley cover 40 is disposed adjacent to the left side of the support member 42 in FIG. 2, and the hook 44 is fitted in the groove 40 a of the pulley cover 40 so as to be non-rotatably restrained.
The main shaft 38 has a cylindrical portion 38b formed of a pulley cover 40.
And the hole 42b of the support member 42 are rotatably fitted. The fixing member 50 has a hexagonal shaft portion 50b formed on the vertical surface 48a of the side plate 48 as shown in FIG.
From the middle right side, it penetrates through the hexagonal hole 48b of the side plate 48 and is detachably inserted into the hexagonal hole 38a of the main shaft 38. By inserting the hexagonal shaft portion 50b into the hexagonal hole 38a of the main shaft 38, the main shaft 38 is restrained from rotating.
Further, since the head 50a of the fixing member 50 contacts the vertical surface 48a of the side plate 48, further insertion is restricted. The plate cover 52 is detachably attached to the side plate 48 so as to cover the vertical surface 48a of the side plate 48 and the head 50a of the fixing member 50. Thereby, it is possible to prevent the hexagonal shaft portion 50b of the fixing member 50 from coming out of the hexagonal hole 38 of the main shaft 38. The clutch spring receiver 24 is fitted so that the hexagonal hole 24 e thereof rotates integrally with the large hexagonal shaft portion 38 c of the main shaft 38. Bearing collar 34
Is rotatably fitted to the small diameter portion 24c of the clutch spring receiver 24. A bearing 36 is inserted into each groove 34 a of the bearing collar 34. The pulley 32 is provided with a bearing collar 34 disposed in the through hole 32b, and is rotatably supported by the clutch spring receiver 24 via a bearing 36. A ball chain (operation code) 56 that can rotate the pulley 32 is wound around the outer diameter portion of the pulley 32. The clutch ring 26 is fitted with the large diameter portion 24b of the clutch spring receiver 24 by inserting the projection 24d of the clutch spring receiver 24 into the notch 26a.
The clutch springs 30 and 31 are fitted to the outer diameter portion of the clutch ring 26 so as to be fastened and released.
The clutch springs 30 and 31 are configured such that the pawl portions 30 a and 31 a are in contact with both side ends of the protruding piece 32 a of the pulley 32, respectively, and the protruding portions 22
f are arranged so as to come into contact with both end portions after a relative rotation by a predetermined angle. When the rotational force from the pulley 32 is transmitted, the clutch springs 30 and 31
When the claws 30a and 31a of the pins 0 and 31 are pushed by the protruding pieces 32a of the pulley 32 and the diameter thereof is increased, the fastening with the clutch ring 26 is released and the pulley 32 rotates integrally with the pulley 32. When the rotational force is transmitted, the pawl portions 30a and 31 of the clutch springs 30 and 31
a is pressed by the protruding piece 22f of the case 22,
It is configured to be reduced in diameter and fastened to the clutch ring 26. The washers 28 and 29 are relatively rotatably fitted to the outer diameter of the clutch ring 26 with the clutch springs 30 and 31 interposed therebetween. Case 2
2 is that the groove 22e is formed by the ridge 14a of the winding pipe 14.
The insertion part 2
2 a is inserted into the winding pipe 14. Case 22
The flange portion 22b is in contact with the right end of the winding pipe 14 in FIG. 2, and restricts the further insertion of the case 22 into the winding pipe 14. In the case 22, the small-diameter hole 22d is rotatably fitted to the cylindrical portion 38d of the main shaft 38. The space 22c of the case 22
Include a bearing collar 34, a clutch ring 26, a washer 28, clutch springs 30 and 31, and a washer 28.
And 29, and the protruding piece 32a of the pulley 32 are arranged. The E-ring 20 is fitted to the small hexagonal shaft portion 38e of the main shaft 38 so as to contact the left end of the case 22 in FIG. The bolt shaft 16 is fitted so that the hexagonal hole 16c thereof rotates integrally with the small hexagonal shaft portion 38e of the main shaft 38. The moving top 18 has a female thread 18
b is screwed into the threaded portion 16a of the bolt shaft 16.
The movable frame 18 has a groove 18a fitted to the ridge 14a of the winding pipe 14, so that the moving frame 18 can rotate integrally with the winding pipe 14 and relatively move in the axial direction. One end of a screen 58 is connected to the winding pipe 14 so that the screen 58 can be wound and unwound.
The other end of the screen 58 is connected to a weight bar 60 as shown in FIG.

Next, the setting of the lowermost position of the screen 58 will be described. First, as shown in FIG. 3, while completely winding the screen 58 around the winding pipe 14,
The cylindrical member 38b of the main shaft 38 is fitted into the hole 42b of the support member 42 while supporting and maintaining the state in which the moving top 18 is in contact with the restricting portion 16b of the bolt shaft 16 by hand. Is supported by one side plate 48, and the other end of the winding pipe 14 is rotatably supported by the other side plate 48. Here, the plate cover 52 and the fixing member 50 are left detached, and the main shaft 38 is rotatable. Next, the hand is released from the winding pipe 14. As a result, the screen 58 and the weight bar 60 apply a rotating force to the winding pipe 14 in the direction in which the screen 58 is unwound by the weight of the weight. As a result, the winding pipe 14 is
8 is rotatable, no force for restricting rotation is applied thereto, and the movable frame 18 is
, And further movement in the axial direction is regulated, so that the movable frame 18 and the bolt shaft 1
6 and the main shaft 38 start to rotate together. Therefore, the screen 58 is unwound from the winding pipe 14. After the screen 58 is lowered to the desired position shown in FIG. 4, the take-up pipe 14 is manually held so as to stop the rotation, and the lowering of the screen 58 is stopped. Next, while holding the winding pipe 14 by hand, the hexagonal shaft portion 50b of the fixing member 50 is
The hexagonal hole 48b of the side plate 48 is penetrated from the middle right side and inserted into the hexagonal hole 38a of the main shaft 38. Next, the plate cover 52 is pushed up from below the side plate 48 and attached to the side plate 48 as shown in FIG. Thereby, the fixing member 50 is fixed to the hexagonal hole 3 of the main shaft 38.
The main shaft 38 is non-rotatably supported by the side plate 48 because the plate cover 52 prevents the main shaft 38 from slipping out of the position 8a. As a result, the lowest position of the screen 58 is set. As described above, the winding pipe 1
4 is attached to the side plate 48 and the screen 5
Since the lowermost position 8 can be set, the setting operation is facilitated.

Next, the operation when the screen 58 is raised and lowered will be described. First, when raising the screen 58 from the lowermost position shown in FIG. 5, one side of the ball chain 56 is pulled down. As a result, the pulley 32 rotates in the winding direction of the screen 58, so that the projecting piece 3
2a is the pawl portions 30a and 3 of the clutch springs 30 and 31
1a is pressed to expand the diameters of the clutch springs 30 and 31. For this reason, the clutch springs 30 and 31
The connection with the clutch ring 26 is released, and the clutch ring 26 rotates together with the pulley 32. After the pulley 32 rotates by a predetermined angle together with the clutch springs 30 and 31, the protruding piece 32a
Are the claws 30a and 31a of the clutch springs 30 and 31
Contact the protruding portion 22f of the case 22 through the
2 so as to be integrally rotated. Thereby, the rotation of the pulley 32 is transmitted to the winding pipe 14 via the case 22, and the winding pipe 14 winds the screen 58. At this time, since the moving top 18 rotates with the rotation of the winding pipe 14, the moving top 18 moves the screw portion 16a of the bolt shaft 16 rightward in FIG. After raising the screen 58 to a desired position, the operation of the ball chain 56 is stopped, and the hand is released. This allows
The screen 58 causes the winding pipe 1 to move by its own weight.
4, a rotational force in the direction of unwinding the screen 58 is applied. For this reason, the case 22 tries to rotate in the unwinding direction of the screen 58 together with the winding pipe 14, but after rotating by a predetermined angle, the protruding portion 22f of the case 22
The first claws 30a and 31a are pressed. Therefore, the clutch springs 30 and 31 are reduced in diameter and fastened to the clutch ring 26, so that the rotation of the case 22 is restricted. Therefore, the rotation of the winding pipe 14 is also restrained, and the screen 58 stops at the desired position. Next, when lowering the screen 58, the other side of the ball chain 56 is pulled down. Thereby, the pulley 32
Is rotated in the unwinding direction of the screen 58, so that the protruding piece 32 a thereof is engaged with the claws 30 of the clutch springs 30 and 31.
a and 31a are respectively pressed to expand the diameters of the clutch springs 30 and 31. Therefore, the clutch springs 30 and 31 are released from the engagement with the clutch ring 26 and rotate with the pulley 32. After the pulley 32 rotates a predetermined angle together with the clutch springs 30 and 31, the protruding piece 32a thereof comes into contact with the protruding portion 22f of the case 22 via the claws 30a and 31a of the clutch springs 30 and 31,
It is connected so as to rotate integrally with the case 22. Thereby, the rotation of the pulley 32 is transmitted to the winding pipe 14 via the case 22, and the winding pipe 14 unwinds the screen 58. At this time, since the movable top 18 rotates with the rotation of the winding pipe 14, the movable top 18 moves the screw portion 16a of the bolt shaft 16 to the left in FIG. As shown in FIG. 5, once the movable top 18 has moved to a position where it contacts the restricting portion 16b of the bolt shaft 16, it cannot move any further, so its rotation is restricted. As a result, the rotation of the winding pipe 14 is also restricted, so that the ball chain 56 cannot be pulled down. Therefore, the screen 58 stops at the set lowermost position. As described above, the ball chain 56
Can be used only for driving the pulley 32 to rotate, so that there is no need to provide a member such as a reverse winding prevention connector for restricting the rotation of the pulley 32. Therefore, the appearance of the ball chain 56 is improved.

In the above embodiment, the set lowermost position of the screen 58 is set to a desired position where the screen 58 is not completely unwound from the winding pipe 14. However, the present invention is not limited to this. Is winding pipe 14
May be set to a completely unwound position from the position. In addition, the clutch mechanism includes the protrusion 22f of the case 22, the clutch spring receiver 24, the clutch ring 26, the clutch springs 30 and 31, and the protrusion 32a of the pulley 32, but is not limited thereto. When the clutch springs 30 and 31 are arranged directly on the outer peripheral side of the main shaft 38 and the clutch springs 30 and 31 are reduced in diameter, they are fastened to the main shaft 38 while they are expanded in diameter.
It is also possible to configure so that the fastening with the main shaft 38 is released. In the above embodiment, the side plate 48 of the main shaft 38 is used.
The switching between the freely rotatable state and the non-rotatable state was performed by the fixing member 50.

[0012]

According to the present invention, the main shaft is rotatably supported on the side plate by the fixing member so that the main shaft can be switched between a rotatable state and a non-rotatable state, and the bolt shaft is connected integrally with the main shaft. The nut member is screwed in the axial direction so that the movement of the predetermined amount or more is restricted by the restricting portion, and the nut member and the winding pipe are connected so as to rotate integrally. A structure in which the winding pipe and the main shaft are fastened by the rotating force from the winding pipe, while the fastening between the winding pipe and the main shaft is released by the rotating force from the pulley, and the pulley and the winding pipe are integrally rotated. To Thus, the lowermost position of the screen is set by setting the main shaft to be rotatable with respect to the side plate, thereby making the winding pipe rotatable, and positioning the lowermost position of the screen to a desired position. Thereafter, the main shaft can be supported by the side plate in a non-rotatable state. Therefore, the lowermost position of the screen can be set while the take-up pipe is attached to the side plate, thereby facilitating the setting operation. Further, since the stop of the screen can be performed by the movable frame, the restricting portion of the bolt shaft, the clutch spring, and the like, the operation cord is used only for driving the pulley to rotate. Therefore,
Since there is no need to provide a member such as a reverse winding prevention connector for stopping the screen on the operation code, the appearance of the operation code is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a screen stop device of the present invention.

FIG. 2 is a partial sectional view of a roll screen on a side where a screen stopping device is provided.

FIG. 3 is a view showing a state in which a winding pipe is attached to a side plate.

FIG. 4 is a diagram showing a state where the screen is lowered to a lowermost position.

FIG. 5 is a diagram showing a state in which the lowest position of the screen is set.

FIG. 6 is a diagram showing a state in which the screen is being moved up and down.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Roll screen 12 Screen stop device 14 Winding pipe 16 Bolt shaft 16a Screw part 16b Restriction part 18 Moving top (nut member) 30, 31 Clutch spring 32 Pulley 38 Main shaft 48 Side plate 54 Set frame 56 Ball chain (Operation code) 58 screen

Claims (1)

(57) [Claims] An end of a screen (58) is connected to a winding pipe (14) rotatably supported at both ends by a side plate (48) so as to be wound and unwound,
Pulley (32) capable of driving rotatably the winding pipe (14)
A screen stop device (12) for a roll screen, which has an operation code (56) capable of operating the rotation drive of the pulley (32). A main shaft (38) supported by the plate (48) so as to be switchable between a rotatable state and a non-rotatable state, and a bolt shaft (16) integrally connected to the other end of the main shaft (38). A screw shaft (16a) of the bolt shaft (16) is axially movably screwed into the screw portion (16a), and the winding pipe (1)
4) The nut member (1) rotatably connected to the nut member (1).
8) and a restricting portion (16) provided on the bolt shaft (16) for restricting the axial movement of the nut member (18) by a predetermined amount or more.
b) and the winding pipe (1) by the rotational force from the pulley (32).
4) While the fastening between the main shaft (38) is released, the winding pipe (14) is rotated by the rotational force from the winding pipe (14).
Springs (30, 31) acting to fasten the main shaft (38) and the main shaft (38), and a state in which the main shaft (38) cannot be rotated to the side plate (48) by being detachably inserted into the side plate (48). And the main shaft (38) is rotatable with respect to the side plate (48) in a state where the main shaft (38) can be detached from the side plate (48) and is detached therefrom.
0) and a roll screen stopping device, comprising: