JP3122706B2 - Roll screen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A conventional screen winding upper limit position setting device is disclosed in Japanese Utility Model Publication No. 58-21919 and Japanese Utility Model Publication No. 3-16400. That is, the screen winding upper limit position setting device disclosed in Japanese Utility Model Publication No. 58-21919 is a stationary bolt disposed and fixed on a rotating shaft of a screen winding cylinder, and is screwed to the stationary bolt. A moving piece connected to the winding cylinder and movable and rotatable in the axial direction of the stationary bolt, a brake plate mounted on the stationary bolt and pressed against the moving piece, and a braking plate on the stationary bolt axis. Arranged to polymerize on
And a pressure contact body which resiliently biases and presses the brake plate in the direction of the moving frame. To set the winding upper limit of the screen, first, remove the rotating cylinder from the bracket, rotate and screw the moving piece with fingers or the like, press it fully against the brake plate, and roll it up to the desired position. This is carried out by mounting in a rotating cylinder. Thereby, when the screen that has been pulled down is wound up to a desired position, the moving piece, the brake plate,
The braking by the press contact body or the like is performed. Further, a screen winding upper limit position setting device disclosed in Japanese Utility Model Publication No. 3-16400 discloses a fixed shaft for rotatably supporting a roll pipe, a bolt provided on an extension shaft portion of the fixed shaft,
A moving frame that is mounted on the bolt as a nut and rotates on the roll pipe to move on the bolt, and a brake that brakes the moving frame, wherein the brake is provided with a brake drum provided on an extension of the fixed shaft. A coil spring, which is wrapped around the brake drum so that it can be loosened and loosened, and has one end locked to the extension shaft of the fixed shaft and the other end free, and an engagement portion provided on the coil spring side of the movable frame. The rotation of the roll pipe is stopped by engaging the engaging portion of the movable frame with the other end of the coil spring and fastening the coil spring to the brake drum. To set the screen take-up upper limit position, first remove the roll pipe from the bracket and move the moving frame to a position where the engaging portion engages the other end of the coil spring to fix the coil spring to the brake drum. In this state, the screen is attached to a roll pipe wound up to a desired position. Thus, even if the roll pipe rotates rapidly, when the screen is wound up to the above desired position and stopped, the shock is absorbed by the coil spring via the moving frame, so that the roll pipe can be stopped quietly. Can be.

[0003]

However, the above-mentioned conventional screen winding upper limit position setting device disclosed in Japanese Utility Model Publication No. 58-21919 is disclosed in Japanese Utility Model Publication No. Sho 58-21919.
In both cases disclosed in Japanese Patent Application Publication No. 16400, when setting the upper limit position of the screen, the rotating cylinder or the roll pipe must be removed from the bracket, so that the setting operation of the upper limit position of the screen is very troublesome. There is a problem. To solve the above problem, there is one disclosed in Japanese Patent Publication No. 5-38839. The screen winding upper limit position setting device shown therein includes a fixed shaft rotatably supporting a roll pipe of a roll blind, a bolt provided on an extension portion extending inward in the axial direction of the fixed shaft, and a nut attached to the bolt. It consists of a moving top that rotates on the bolt by rotating with the roll pipe, and a coil spring that regulates the movement of the moving top. The brake drum is fixed to the bracket, and the brake coil spring is relaxed around the brake drum. Wrapped tightly, loosely fit the notched sector with a part of the circumference around the coil spring as a notch, loosely fit the dial on the outer circumference of the sector, and cut the projecting portions at both ends of the braking coil spring. Insert into the notch, insert the inner peripheral protrusion provided on the inner periphery of the dial into the coil spring both ends protrusion in the sector notch, and use the retaining ring And interior color to the brake drum so as not to be able to get out of the part, to secure the sector to color,
An outer end portion of a fixed shaft extending axially outward from the roll pipe is fixed to an axial hole passing through the axis of the sector and the collar to support the roll pipe. When the sector is to be rotated from the stationary bolt side, the sector pushes the protruding end of the brake coil spring in a direction in which the brake coil spring is tightened, so that the brake coil spring is fastened to the brake drum and stops the rotation of the sector. On the other hand, when you turn the dial,
As the inner circumferential projection of the dial pushes the projecting end of the brake coil spring in the direction in which the brake coil spring expands, the brake coil spring is expanded and rotates the sector or bolt with the dial. Therefore, the setting of the upper limit position of the screen can be performed by turning the dial and adjusting the position of the moving frame on the bolt. Thereby, it is possible to set the winding upper limit position of the screen with the roll pipe attached to the bracket. However, the one disclosed in Japanese Patent Publication No. 5-38839 also incorporates a braking coil spring built into the dial in order to prevent the rotation force of the roll pipe from being transmitted to the bolt via the moving top and to prevent the bolt from rotating. Therefore, in order to turn the dial, a force for pushing and expanding the brake coil spring is required. Also, in order to set the upper winding position of the screen, the dial must be rotated many times. However, the roll screen generally has a problem in that it is difficult to keep rotating the dial by applying force since the width and the radial dimension of the dial are reduced because the appearance is emphasized.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a pulley to which a main shaft is integrally rotatably connected is rotatably supported by a side plate, and a rotation of the pulley is permitted by an engagement member. The above-mentioned problem is solved by switching to a state where it is not allowed. That is, the roll screen according to the first aspect of the present invention includes a side plate (14) provided at both ends of the set frame (12).
A winding pipe (16) rotatably supported at both ends by a side plate (14) via a main shaft (32);
A screen (18) having one end connected to the winding pipe (16) so as to be wound and unwound, and a winding pipe (1).
A take-up spring that constantly applies a force to rotate the screen (18) in the take-up direction;
Device (38) having a clutch mechanism capable of switching between a state where the shaft and the main shaft (32) are fastened and a state where the fastening is released, and a screen (1) for the winding pipe (16).
8) a winding upper limit position setting device capable of setting a winding upper limit position, wherein the winding upper limit position setting device is rotatably supported by the side plate (14) and the main shaft ( An engagement member (26) that can be switched between a pulley (28) to which the pulley (32) is integrally rotatably connected, a state in which the pulley (28) is allowed to rotate, and a state in which the pulley (28) is not allowed to rotate; An elastic member (24) capable of constantly pressing the member (26) to a position where rotation of the pulley (28) is not permitted, and a bolt shaft (52) connected to the main shaft (32) concentrically and integrally with the main shaft (32). A nut member (54) which is rotatably connected to the winding pipe (16) and is screwed into the bolt shaft (52) so as to be movable in the axial direction; and a bolt shaft of the nut member (54). (52) axis And regulation capable regulating member the movement of a predetermined amount or more to the direction (56), characterized by having a.
According to a second aspect of the present invention, in the roll screen according to the first aspect, the winding upper limit position setting device includes the side plate (60).
By the main shaft (3)
The control shaft (64) to which 2) is integrally rotatably connected.
A control pawl (66) capable of restricting the control shaft (64) so that it cannot rotate; and a control pawl (66) at a position where rotation of the control shaft (64) is permitted and a position where rotation is not permitted. A switching member (68) that can be switched, a bolt shaft (52) concentrically and integrally rotatably connected to the main shaft (32), and a rotatable integrally connected to the winding pipe (16); A nut member (54) screwed into the bolt shaft (52) so as to be movable in the axial direction;
And 4) a regulating member (56) capable of regulating movement of the bolt shaft (52) in the axial direction by a predetermined amount or more. In addition, the code | symbol in a parenthesis shows the corresponding member of the Example mentioned later.

[0005]

According to the first aspect of the present invention, the upper limit position of the winding of the screen is set as follows. That is, first, with the nut member in contact with the regulating member, the engaging member is pushed up against the elastic force of the elastic member. As a result, the engagement member moves to a state where the rotation of the pulley is permitted.
Therefore, the main shaft and the bolt shaft are also rotatable.
The screen is pulled down while maintaining this state. As a result, the winding pipe rotates in the screen unwinding direction, so that the nut member also tries to rotate integrally with the winding pipe. Since the nut member is in contact with the regulating member and cannot move any more in the axial direction, the winding pipe, the nut member, the bolt shaft, the main shaft, and the pulley start rotating integrally. Lowering the screen to a desired position and pushing up the engagement member while holding the screen with a hand or the like so that the winding pipe is not rotated by the elastic force of the winding spring and the screen is wound up. Stop. Thereby, the engaging member moves by the elastic force of the elastic member and restrains the pulley so as not to allow its rotation. Therefore, the main shaft and the bolt shaft are restrained from rotating. On the other hand, the winding pipe tries to rotate in the screen winding direction by the elastic force of the winding spring, but the rotation is restricted by the action of the stopper device. Thereby, the winding upper limit position of the screen is set. As described above, the screen is lowered to a desired position while pushing up the engagement member, and the screen is wound up by stopping pushing up the engagement member while holding the screen by hand or the like so as not to change the position of the screen. Since the take-up upper limit position can be set, the work of setting the take-up upper limit position can be easily performed. Further, the setting of the winding upper limit position of the screen according to claim 2 is performed as follows. That is, first,
With the nut member in contact with the regulating member, the switching pawl is switched by the switching member to a position where rotation of the control shaft is permitted. As a result, the control shaft becomes rotatable,
The main shaft and the bolt shaft become rotatable. Next, pull down the screen. As a result, the winding pipe rotates in the screen unwinding direction, so that the nut member also tries to rotate integrally with the winding pipe. Since the nut member is in contact with the regulating member and cannot move any more in the axial direction, the winding pipe, the nut member, the bolt shaft, the main shaft, and the control shaft start rotating integrally. Lower the screen to a desired position, and hold the screen with a hand or the like while holding the screen by hand so that the control pawl is controlled so that the winding pipe is not rotated by the elastic force of the winding spring and the screen is wound. Switch to a position where control shaft rotation is not allowed. As a result, the control shaft is restrained from rotating, and the main shaft and the bolt shaft are restrained from rotating. On the other hand, the winding pipe attempts to rotate in the screen winding direction due to the elastic force of the winding spring. However, since the nut member cannot be moved in the axial direction by the regulating member and the rotation is restricted, the winding pipe is The rotation is also restricted. Thereby, the winding upper limit position of the screen is set. In this manner, the control pawl is switched by the switching member to a position allowing the rotation of the control shaft, the control shaft is rotatable, the screen is lowered to a desired position, and the screen is manually moved so that the position of the screen does not change. By holding the control pawl to a position where rotation of the control shaft is not permitted by the switching member and holding the control shaft so that it cannot rotate, the upper winding position of the screen can be set while holding the switch. The setting operation of the upper-limit position can be easily performed.

[0006]

FIG. 1 shows a roll screen 1 embodying the present invention.
2 is an exploded perspective view of the side plate 14 side in FIG. Side plates 14 are provided at both ends of a set frame 12 for attaching the roll screen 10 to a window frame (the side plate at the right end in FIG. 1 is not shown). The winding pipe 16 is rotatably supported by the side plate 14. One end of a screen 18 is connected to the winding pipe 16 so that the screen 18 can be wound and unwound. The winding pipe 16 is constantly applied with a force in the direction of winding the screen 18 by a winding spring (not shown). A weight bar 20 is connected to the other end of the screen 18. As shown in FIG. 4, a pull cord 80 hangs at the center of the weight bar 20 in the longitudinal direction, and a knob 82 is attached to a lower end of the pull cord 80. As shown in FIG. 2, two through holes 14b are formed at a predetermined interval in the vertical portion 14a of the side plate 14.
The support member 22 has a disk-shaped fixing portion 22a fixed to the side plate 14, and a cylindrical portion 22b concentric with the fixing portion 22a and protruding in the axial direction. In the fixing portion 22a, two through holes 22c are formed at positions corresponding to the through holes 14b of the side plate 14, and
A notch 22d is formed at a position 90 degrees apart in the circumferential direction from the two through holes 22c. As shown in FIG. 3, the support member 22 is formed from the left side of the side plate 14 in FIG.
The rivet 30 is inserted into the second through-hole 22 c to be assembled to the side plate 14. One end of the coil spring (elastic member) 24 is inserted into the notch 22d of the support member 22, and is in contact with the upper surface in FIG. The engaging member 26 has a substantially inverted U-shape, and the upper piece 26b projects from the upper surface in FIG.
6a protrudes upward. The engaging member 26 has a protruding portion 26a inserted into the other end of the coil spring 24, and the downward movement in FIG. 1 is restricted by the engaging groove 28c of the pulley 28 as described later. 1 is always pressed downward in FIG. 1 by the coil spring 24. Pulley 2
8 has a large diameter portion 28a and a small diameter portion 28b. A spline-shaped engagement groove 28 is provided in the inner diameter portion of the large-diameter portion 28a.
c is formed. A circular hole 28d is formed in the axial center of the small diameter portion 28b to a predetermined position in the axial direction thereof,
From this, a square hole 28e penetrates to the right end in FIG. The cylindrical portion 22b of the support member 22 is
Are rotatably fitted. The engagement groove 28c
As shown in FIG. 3, the upper piece 2 of the engagement member 26
6b is engaged. The main shaft 32 has a partially square and partially circular cross section. Square part 32a of main shaft 32
Are fitted so as to rotate integrally with a square hole 28 e of the pulley 28. The stopper device 38 includes the grooved drum 4
0, a stopper case 42, a stopper case cap 44, a clutch spring 46, and a ball 48. The grooved drum 40 is rotatably fitted to the outer diameter portion of the circular portion 32b of the main shaft 32,
A groove 50 for guiding the movement of the ball 48 is formed on the outer peripheral surface. The stopper case 42 is rotatably fitted to the outer diameter portion of the grooved drum 40 with the ball 48 interposed therebetween, and the outer diameter portion is fixed to the winding pipe 16 so as to rotate integrally therewith. . The grooved drum 40 and the stopper case 42 are connected so as to be integrally rotatable or disconnected depending on the position of the ball 48 that is guided and moved by the groove 50 as they rotate relative to each other. The stopper case cap 44 is provided at one end of the stopper case 42 and connects the stopper case 42 to the main shaft 32 so as to be relatively rotatable. The clutch spring 46 has one end connected to the grooved drum 40 and the main shaft 32.
When the grooved drum 40 rotates in the unwinding direction of the screen 18, the diameter of the grooved drum 40 is increased and the fastening between the grooved drum 40 and the main shaft 32 is released. When rotating in the winding direction of the screen 18, the diameter is reduced and the grooved drum 40 and the main shaft 32 are fastened. The right end of the main shaft 32 in FIG.
Are connected so as to be integrally rotatable. Bolt shaft 52
, A nut member 54 is screwed so that the nut member 54 moves in the axial direction by the rotation of the nut member 54. Nut member 54
Is rotatably connected to the inner diameter of the winding pipe 16. At the other end of the bolt shaft 52, a regulating member 56 for regulating the movement of the nut member 54 in the axial direction by a predetermined amount or more is provided. The plate cover 34 is fitted to the vertical portion 14a of the side plate 14 from below in FIG. At the lower end of the plate cover 34, a notch 34
a is formed, and the engaging member 26 is inserted into the notch 34a. In the first embodiment, the support member 22, the coil spring 24, the engagement member 26, the pulley 2
8, the main shaft 32, the plate cover 34, the bolt shaft 52, the nut member 54 and the regulating member 56 constitute a winding upper limit position setting device.

Next, a method of setting the winding upper limit position of the screen 18 will be described. First, as shown in FIG. 1, with the nut member 54 in contact with the regulating member 56, the engaging member 26 in the state shown in FIG. 4 is pushed up against the elastic force of the coil spring 24. Thereby, as shown in FIG. 5, the upper piece 26b of the engagement member 26 and the pulley 28
Is disengaged from the engagement groove 28c.
Becomes rotatable. For this reason, the main shaft 32 also becomes rotatable. While maintaining this state, the screen 18 is pulled down. As a result, the winding pipe 16 rotates in the screen unwinding direction, so that the nut member 54 also tries to rotate integrally with the winding pipe 16. Nut member 5
Since 4 is in contact with the regulating member 56 and cannot move any more in the axial direction, the winding pipe 16, the nut member 54, the bolt shaft 52, the main shaft 32, and the pulley 28 start to rotate integrally. The screen 18 is lowered to a desired position shown in FIG. 6, and the screen 18 is held by hand or the like so that the winding pipe 16 is not rotated by the elastic force of the winding spring and the screen 18 is wound. The pushing up of the engagement member 26 is stopped. As a result, the engaging member 26 is moved by the elastic force of the coil spring 24 as shown in FIG.
Lowering downward, as shown in FIG.
Since b engages with the engagement groove 28c of the pulley 28, the pulley 28 is restrained from rotating. Therefore, the spindle 32
And the bolt shaft 52 is restrained from rotating. On the other hand, the winding pipe 16 tends to rotate in the winding direction of the screen 18 due to the elastic force of the winding spring. However, since the rotating force in the winding direction of the screen 18 is applied to the grooved drum 40 via the stopper case 42. , Clutch spring 4
6 is reduced in diameter, and the grooved drum 40 and the main shaft 32 are fastened. Thereby, the grooved drum 40 and the stopper case 4
Via 2, the rotation of the winding pipe 16 is restricted. Thereby, the winding upper limit position of the screen 18 is set. Thus, after lowering the screen 18 to a desired position while pushing up the engaging member 26,
By stopping the lifting of the upper limit, the winding upper limit position of the screen 18 can be set, so that the setting operation of the winding upper limit position can be easily performed.

To raise the winding upper limit position of the screen 18 higher than the once set position, the screen 1
8 is stopped at the set position, and the engaging member 26 is pushed up. Thereby, the pulley 28 is in a rotatable state, so that the main shaft 32 and the bolt shaft 52 are also in a rotatable state. At this time, since the nut member 54 is in contact with the regulating member 56, the winding pipe 16, the nut member 54, the bolt shaft 52, and the main shaft 32 are formed by the elastic force of the winding spring.
And the pulley 28 rotates integrally with the screen 18 winding direction. As a result, the screen 18 moves up. Raise screen 18 to the desired position,
While holding the screen 18 with a hand or the like so as not to further rise, the pushing up of the engagement member 26 is stopped. Thus, the winding upper limit position of the screen 18 is reset as described above. When it is desired to further lower the winding upper limit position of the screen 18 from the once set position, the engaging member 26 is pushed up while the screen 18 is stopped at the set position, and the screen 18 is pulled down to a desired position. In order to prevent the winding pipe 16 from rotating and the screen 18 being wound by the elastic force of the winding spring, the lifting of the engaging member 26 is stopped while holding the screen 18 with a hand or the like. .

When the screen 18 is to be lowered after the winding upper limit position of the screen 18 has been set, the knob 82 is pulled down with the knob 82. As a result, the winding pipe 16 is
Since the nut rotates in the counterclockwise direction, the nut member 54 and the stopper case 42 rotate integrally therewith. By the rotation of the stopper case 42, the stopper case 42 and the grooved drum 40 are fastened via the ball 48, and the grooved drum 4
0 also rotates in the unwinding direction of the screen 18, but when the grooved drum 40 rotates in the unwinding direction of the screen 18, the clutch spring 46 expands in diameter and the grooved drum 40 and the main shaft 3 are rotated.
2, the main shaft 32 does not rotate.
For this reason, since the bolt shaft 52 does not rotate, the nut member 54 rotates on the bolt shaft 52 as shown in FIG.
Move in the middle left direction. Thereby, the screen 18
Is unwound from the winding pipe 16. Screen 18
After lowering the weight bar 20 to the position shown in FIG. 7, when the pulling down of the weight bar 20 is stopped, the winding pipe 16 tends to rotate in the winding direction of the screen 18 by the elastic force of the winding spring. For this reason, a rotational force in the winding direction of the screen 18 is applied to the grooved drum 40 via the stopper case 42, so that the clutch spring 46 is reduced in diameter, and the grooved drum 40 and the main shaft 32 are fastened. This allows
The rotation of the winding pipe 16 is restricted via the grooved drum 40 and the stopper case 42. Therefore, the screen 18 stops at a desired position.

Next, when the screen 18 is raised, the knob 82 is slightly lowered with the knob 82. This allows
Since the stopper case 42 is slightly rotated in the screen unwinding direction together with the winding pipe 16, the ball 48 is guided by the groove 50, and the fastening between the stopper case 42 and the grooved drum 40 is released. For this reason, the winding pipe 1
6 and the stopper case 42 rotate in the winding direction of the screen 18 by the elastic force of the winding spring. Thereby, the nut member 54 that rotates integrally with the winding pipe 16 is formed.
Moves rightward in FIG. 1 on the bolt shaft 52. When the nut member 54 moves to the position of the restriction member 56, the rotation of the winding pipe 16 is restricted because the nut member 54 contacts the restriction member 56 and cannot rotate any more. Thus, the lifting of the screen 18 stops.
The position where the screen 18 stops is the winding upper limit position of the screen 18 set previously.

In the above embodiment, the coil spring 24 is used as the elastic member.
Anything that can be engaged with, for example,
A rubber block that acts so as to press the engagement member 26 in the direction of the pulley 28 can also be used. Further, in the above embodiment, by continuing to push up the engaging member 26 with a finger, the engaging member 26 can be held at the engagement position with the pulley 28. However, the engaging member 26 is pushed up with the finger. Even if it is not continued, a locking device that can hold the engagement position and the disengagement position with the pulley 28 may be provided.

FIG. 8 shows a second embodiment. Since this has the same structure as that of the first embodiment except for the portion shown in FIG. 9 described below, description of the same portions as those of the first embodiment will be omitted. That is, as shown in FIG. 9, the vertical portion 60a of the side plate 60 has a through hole 6 through which the two rivets 72 can pass.
0b are formed at predetermined intervals in the width direction.
In addition, two insertion holes 60d into which protrusions 62c of the first pipe receiver 62 described later can be inserted are formed at predetermined intervals in the width direction above the through hole 60b. Also,
A protrusion 60c is formed on the vertical portion 60a at a central position in the width direction above the insertion hole 60d. The first pipe receiver 62 has a space 62a in which a control shaft 64 and a control pawl 66 described later can be arranged. The first pipe receiver 62 has a groove 62b at the upper end thereof into which the projection 60c of the side plate 60 can be fitted, and an insertion hole 60d of the side plate 60 at both ends on the side facing the side plate 60. 62c that can be inserted into each
(62c on the right side in FIG. 9 is not shown). A space 62 is provided on the surface of the first pipe receiver 62 opposite to the side facing the side plate 60.
Two protruding portions 62d are formed on both sides of a at a predetermined interval in the vertical direction. Through holes 62e are formed between the upper and lower projecting portions 62d of the first pipe receiver 62, respectively. The projections 60c of the side plate 60 are fitted into the grooves 62b of the first pipe receiver 62, and the projections 62c are inserted into the insertion holes 60d of the side plate 60, respectively. The control shaft 64 has a cylindrical shape, and a space 64a having a rectangular cross section is formed in the axial center from one end of the control shaft 64 to a predetermined position in the axial direction. As shown in the figure, the control shaft 64 has an end on the side plate 60 side over its entire circumference in the circumferential direction.
An engaging piece 64b that protrudes in a mountain shape in the radial direction continuously is formed. As shown in FIG. 10, the control shaft 64 is configured such that the engagement piece 64 b of the control shaft 64 has a space portion 62 a of the first pipe receiver 62.
Are arranged so as to be relatively rotatable. The rectangular portion 32a of the main shaft 32 is inserted into the space 64a of the control shaft 64 so as to rotate integrally. The control pawl 66 is formed on one side thereof with a continuous mountain-shaped engaging portion 66a that can be engaged with the engaging piece 64b of the control shaft 64. A sliding piece 66b protrudes from a surface of the control claw 66 opposite to the surface facing the side plate 60. The control pawl 66
As shown in FIG. 10, the control shaft 64 is vertically movably disposed at two places above and below the control shaft 64 in the space 62 a of the first pipe receiver 62.
When they are moved to the position closest to the above, the engaging portions 66a and the engaging pieces 64b of the control shaft 64 are engaged with each other. The operation dial (switching member) 68 has a ring shape. On the inner diameter portion of the operation dial 68, projecting pieces 68 projecting radially at two places in the vertical direction in FIG.
a is formed, and the protruding piece 68a has a guide groove 68b.
Is penetrating. The operation dial 68 is disposed adjacent to the first pipe receiver 62 through the control shaft 64 therein. In the guide groove 68b of the operation dial 68,
As shown in FIG. 11, the sliding piece 66b of the control pawl 66
Are movably inserted while being guided by the guide groove 68b. The second pipe receiver 70 has a cylindrical shape with a collar, and a through hole 70a is formed in the axis of the second pipe receiver 70 so that the outer diameter portion of the control shaft 64 can be relatively rotatably fitted. A projection 70b that projects in the axial direction is formed on a surface of the flange 70e of the second pipe receiver 70 that faces the side plate 60. In the protruding portion 70b, fan-shaped notches 70f are formed at symmetric positions. In addition, the projecting portion 70b has a projecting portion 6 of the first pipe receiver 62.
Four insertion holes 70c into which 2d can be inserted, and two rivet insertion holes 7 into which rivets 72 can be inserted.
0d, respectively. Second pipe receiver 7
0, the flange 70e of the operation dial 68 is fitted to the inner diameter of the operation dial 68. As shown in FIG. 11, the notch 70f allows the protruding piece 68a of the operation dial 68 to relatively rotate by a predetermined angle. Has been inserted. In addition, the second pipe receiver 70 includes a through hole 60 b of the side plate 60,
By inserting the rivets 72 from the left side in FIG. 8 of the side plate 60 into the through hole 62e of the first pipe receiver 62 and the insertion hole 70d of the second pipe receiver 70, respectively,
It is fixed to the first pipe receiver 62 and the side plate 60. The control shaft 64 is fitted in the through hole 70a of the second pipe receiver 70 so as to be relatively rotatable.
The plate cover 74 is attached to the vertical portion 6 of the side plate 60.
0a is fitted from below in FIG. In the second embodiment, the first pipe receiver 62,
Control shaft 64, control pawl 66, operation dial 68, second pipe receiver 70, main shaft 32, bolt shaft 52, nut member 5
The winding upper limit position setting device is constituted by the fourth member 4 and the regulating member 56.

Next, a method of setting the winding upper limit position of the screen 18 will be described. First, roll screen 1
0, as shown in FIG.
4b is engaged with the engaging portion 66a of the control pawl 66, the nut member 54 is brought into contact with the regulating member 56, and the operation dial 68 is rotated counterclockwise in FIG. Thereby, as shown in FIG. 12, the sliding piece 66b of each control pawl 66 is
Are moved to the positions shown in FIG. 12 respectively by the guide grooves 68b, and as shown in FIG.
The engagement between the engagement portion 66a of the control shaft 64 and the engagement piece 64b of the control shaft 64 is released. Therefore, the control shaft 64 is in a rotatable state, and the main shaft 32 is also in a rotatable state. Next, the screen 18 is pulled down. As a result, the winding pipe 16 rotates in the screen unwinding direction, so that the nut member 54 also tries to rotate integrally with the winding pipe 16. The nut member 54 is in contact with the regulating member 56,
Since it cannot move further in the axial direction, the winding pipe 16, the nut member 54, the bolt shaft 52, the main shaft 32, and the control shaft 64 start to rotate integrally. The screen 18 is lowered to a desired position shown in FIG. 14 so that the winding pipe 16 is not rotated by the elastic force of the winding spring and the screen 18 is wound up.
The operation dial 68 is rotated clockwise in FIG. As a result, the sliding piece 66b of each control pawl 66 is moved to the guide groove 68 of the operation dial 68.
b and moves to the positions shown in FIG. 11 respectively, and as shown in FIG.
Are engaged with the engaging pieces 64b of the control shaft 64, respectively. Therefore, the control shaft 64 is restrained from rotating. Therefore, the main shaft 32 and the bolt shaft 52 are restrained from rotating. On the other hand, the winding pipe 16 tries to rotate in the winding direction of the screen 18 by the elastic force of the winding spring, but the nut member 54 is in contact with the regulating member 56, and can move further in the axial direction. Without
Since the rotation is restricted, the rotation of the winding pipe 16 that rotates integrally with the nut member 54 is also restricted. Thereby, the winding upper limit position of the screen 18 is set. As described above, by rotating the operation dial 68 in a predetermined direction, the engagement between each control pawl 66 and the control shaft 64 is released, and the control shaft 64 is made rotatable, and the screen 18 is moved to a desired position. The screen 18 is held by a hand or the like so that the winding pipe 16 is not rotated by the elastic force of the winding spring and the screen 18 is wound. By rotating the control shaft 64 in the opposite direction, the respective control pawls 66 and the control shaft 64 are engaged with each other so that the control shaft 64 cannot be rotated, and the winding upper limit position of the screen 18 can be set. Therefore, the work of setting the winding upper limit position can be easily performed.

If it is desired to raise the winding upper limit position of the screen 18 from the position once set, the screen 1
8 is stopped at the set position, and the operation dial 68 is stopped.
Is rotated counterclockwise in FIG. As a result, the control shaft 64 becomes rotatable similarly to the above, so that the main shaft 32 and the bolt shaft 52 also become rotatable. At this time, since the nut member 54 is in contact with the regulating member 56, the winding pipe 16,
Nut member 54, bolt shaft 52, main shaft 32, and control shaft 6
4 rotates integrally with the screen 18 in the winding direction. As a result, the screen 18 moves up. The screen 18 is raised to a desired position, and the operation dial 68 is rotated clockwise in FIG. 12 while holding the screen 18 with a hand or the like so as not to be further raised. Thus, the winding upper limit position of the screen 18 is reset as described above. The screen 18
If it is desired to lower the winding upper limit position from the position once set, the operation dial 68 is rotated counterclockwise in FIG. 11 to rotate the control shaft 64 while the screen 18 is stopped at the set position. In a possible state, the screen 18 is pulled down to a desired position, and the screen 18 is held by a hand or the like so that the winding pipe 16 is not rotated by the elastic force of the winding spring and the screen 18 is wound. The operation is performed by rotating the operation dial 68 clockwise in FIG. 12 so that the control shaft 64 cannot rotate.

The operation of lowering and raising the screen 18 after the winding upper limit position of the screen 18 is set is the same as that of the first embodiment, and therefore the description is omitted.

In the above embodiment, the switching member is a ring-shaped operation dial 68 and the operation dial 6
The control pawl 66 is moved by rotating the control pawl 8, but the invention is not limited thereto.
The control pawl 66 can be moved by moving the switching member 6 in a rectangular frame shape and moving the switching member in the left-right or up-down direction as long as the control pawl 6 can be moved between two predetermined positions. You may do so.

[0017]

According to the first aspect of the present invention, the screen is lowered to a desired position in a state where the engaging member is pushed up, and the screen is held by a hand or the like so as not to change the position of the screen. By stopping the pushing up of the engagement member, the winding upper limit position of the screen can be set, so that the setting operation of the winding upper limit position can be easily performed. According to the second aspect of the present invention, the control pawl is switched to a position allowing rotation of the control shaft by the switching member, the control shaft is rotatable, the screen is lowered to a desired position, and the screen is lowered. While holding the hand by hand or the like so that the position does not change, the control pawl is switched to a position where rotation of the control shaft is not permitted by the switching member, and the control shaft is restrained from rotating so that the screen winding upper limit position. Can be set, so that the work of setting the winding upper limit position can be easily performed.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a roll screen embodying the present invention.

FIG. 2 is an exploded perspective view of a side plate side.

FIG. 3 is a sectional view taken along line 3-3 in FIG.

FIG. 4 is a sectional view taken along line 4-4 in FIG. 1;

FIG. 5 is a view showing a state in which the engagement between the engagement member and the pulley is released.

FIG. 6 is a view showing a state in which the screen has risen to a winding upper limit position.

FIG. 7 is a diagram illustrating a state where the screen has been lowered to a lowest position.

FIG. 8 is a partial cross-sectional view of a roll screen according to a second embodiment.

FIG. 9 is an exploded perspective view of the side plate side of the second embodiment.

FIG. 10 is a sectional view taken along the line 10-10 in FIG. 8;

FIG. 11 is a sectional view taken along line 11-11 of FIG. 8;

12 is a diagram showing a state where the engagement between the control pawl and the control shaft is released, as viewed from the plane shown in FIG. 11;

FIG. 13 is a view of the state where the engagement between the control pawl and the control shaft is released, as viewed from the plane shown in FIG. 10;

FIG. 14 is a view showing a state where the screen has been raised to a winding upper limit position.

[Explanation of symbols]

 Reference Signs List 10 roll screen 12 set frame 14 side plate 16 winding pipe 18 screen 24 coil spring (elastic member) 26 engaging member 28 pulley 32 main shaft 38 stopper device 52 bolt shaft 54 nut member 56 regulating member 64 control shaft 66 control pawl 68 operation Dial (switching member)

Claims (2)

(57) [Claims] 1. A side plate (14) provided at both ends of a set frame (12), and a winding pipe (16) rotatably supported by the side plate (14) at both ends via a main shaft (32). A screen (18) having one end connected to the winding pipe (16) so as to be wound and unwound; and a force for constantly rotating the winding pipe (16) in the screen (18) winding direction. A take-up spring, a stopper device (38) having a clutch mechanism capable of switching between a state in which the take-up pipe (16) and the main shaft (32) are engaged and a state in which the take-up pipe is released, and a take-up pipe ( And a winding upper limit position setting device capable of setting a winding upper limit position of the screen (18) to 16). A pulley (28) rotatably supported by the shaft (14) and connected with the main shaft (32) so as to be integrally rotatable; a state in which rotation of the pulley (28) is permitted; and a state in which rotation is not permitted. An engagement member (26) that can be switched to an elastic member (24) that can always press the engagement member (26) to a position where rotation of the pulley (28) is not allowed; A bolt shaft (52) concentrically connected to the winding pipe (16) so as to be integrally rotatable, and screwed into the bolt shaft (52) so as to be movable in the axial direction. A roll screen comprising: a nut member (54); and a regulating member (56) capable of regulating movement of the nut member (54) in the axial direction of the bolt shaft (52) by a predetermined amount or more. 2. A side plate (60) provided at both ends of a set frame (12), and a winding pipe (16) rotatably supported by the side plate (60) at both ends via a main shaft (32). A screen (18) having one end connected to the winding pipe (16) so as to be wound and unwound; and a force for constantly rotating the winding pipe (16) in the screen (18) winding direction. A take-up spring, a stopper device (38) having a clutch mechanism capable of switching between a state in which the take-up pipe (16) and the main shaft (32) are engaged and a state in which the take-up pipe is released, and a take-up pipe ( And a winding upper limit position setting device capable of setting a winding upper limit position of the screen (18) to 16). A control shaft (64) rotatably supported by the shaft (60) and coupled with the main shaft (32) so as to be integrally rotatable; and a control pawl (64) capable of restricting the control shaft (64) so as not to rotate. 6
6), a switching member (68) capable of switching the control pawl (66) between a position allowing the rotation of the control shaft (64) and a position not permitting the rotation, and concentric with the main shaft (32). A bolt shaft (52) integrally rotatably connected to the nut; a nut connected to the winding pipe (16) so as to be integrally rotatable and screwed into the bolt shaft (52) so as to be movable in the axial direction. A roll screen comprising: a member (54); and a regulating member (56) capable of regulating movement of the nut member (54) in the axial direction of the bolt shaft (52) by a predetermined amount or more.