JP3218409B2 - 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 which can be stopped and held at an arbitrary feeding position.

[0002]

2. Description of the Related Art With respect to a screen winding mechanism according to the present invention, a clutch mechanism is provided between an operation pulley and a screen winding cylinder to interrupt a rotational force transmitted from the winding cylinder side, and is provided at an arbitrary feeding position. It is known from JP-A-1-192983 to stop and hold the screen. Further, in the present invention, the wire is wound up by the cone-shaped winding pulley, and the screen is pulled out from the winding drum. In this way, the operating force can be continuously changed using the cone-shaped winding pulley. Kaikai 51-73845
And JP-A-61-9481.

[0003]

The roll screen is
In addition to the vertical mode of use for blocking a vertical sliding screen, it is also used in a horizontal mode for blocking a horizontal or inclined sliding screen, such as a daylighting window opened on the roof of a solarium. In such a lateral use mode, an operation system for pulling out the screen from the winding drum is indispensable in addition to an operation system for winding the screen. For example,
In the operation system shown in FIG. 2, the end bar 8 fixed to the lower end of the screen 5 is transferred and guided by a plurality of guide wires 6 provided along the sash screen, and a wire 25 having one end connected to the end bar 8 is wound up. Is pulled out from the winding drum 4.

As described above, in a roll screen in which the screen is operated in both the feeding direction and the winding direction, the screen feeding amount and the wire winding amount or the wire feeding amount and the screen winding amount are accurately determined. It becomes difficult to match. This is because the roll diameter changes continuously when the screen is taken in and out, and the feeding amount or the winding amount always changes. Therefore, if you use the roll screen in the horizontal usage mode,
The drawn-out screen is likely to hang down in a concave arc shape due to its own weight, and there is a problem in that it is not possible to reliably close the sash surface on the appearance. In addition, even in the vertical use mode, the screen itself can swing, so that, for example, the screen shakes due to the wind of the air conditioner, and the end bar may generate an unpleasant impact sound.

[0005] For example, it is conceivable to set the diameter of the winding drum of the wire to be large, and to draw out the screen while keeping the screen taut. In this case, a problem occurs in the operation system on the screen winding side. As described above, the hoisting mechanism of the present invention is configured to include the clutch mechanism that blocks the rotational force transmitted from the winding drum side. Therefore, when a force in the direction of tensioning the screen acts on the winding drum, the rotation of the winding drum is blocked at that time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roll screen in which a screen is moved in both directions of unwinding and winding so that the screen can always be stretched in a state of being tensioned in a flat plate shape, thereby improving the appearance in use.
The aim is to simultaneously ensure the shielding of the sliding door surface. Another object of the present invention is to provide a roll screen capable of reducing the size of a winding mechanism by arranging an operation system for winding a screen and an operation system for pulling out the screen in one place.

[0007]

The roll screen of the present invention comprises a screen 5 and a winding drum 4 for winding the screen 5.
And a winding mechanism for rotating the winding drum 4. The winding mechanism includes a first operation system for rotating the winding drum 4 in both directions of winding and unwinding, and pulling out the screen 5 from the winding drum 4. A first operation system is provided between the operation pulley 13 and the winding shaft 11, the operation pulley 13 being rotatably supported by the winding shaft 11. And a clutch mechanism 15 for interrupting only a rotational force transmitted from the winding drum 4 to the operation pulley 13. The second operation system includes a windable transmission element having one end connected to the feeding start end of the screen 5. 25, a winding shaft 26 that rotates in conjunction with the winding shaft 11, a winding pulley 27 that is rotatably supported by the winding shaft 26 and winds the transmission 25, and one end is connected to the winding shaft 26. Differentials whose ends are respectively connected to the winding pulleys 27 That it contains a yield spring 29 to requirements.

Specifically, a second operating system is arranged on the winding shaft 11 adjacent to the first operating system, and the winding shaft 26 is
Doubles. The transmission 25 is formed of a wire rope, the winding surface of the winding pulley 27 is formed in a cone shape, and a spiral groove 31 for winding and guiding the transmission 25 is formed on the winding surface. When the screen 5 is fully wound, the winding start end of the transmission 25 is positioned at the large-diameter end of the spiral groove 31. In a roll screen that is stretched sideways, a plurality of guide wires 6 are arranged along the stretched surface of the screen 5, and an end bar 8 fixed to the feeding start end of the screen 5 is guided and supported by the guide wire 6 via a hanger 9. .

[0009]

The winding drum 4 is rotated through the winding shaft 11 by rotating the operation pulley 13 in any of the circumferential directions, and unwinds the wound screen 5 or winds the expanded screen 5. The rotation operation of the winding shaft 11 is transmitted to the winding pulley 27 via the winding shaft 26 and the differential absorption spring 29 in order, and the winding pulley 27 winds the transmission body 25 in accordance with the rotation direction of the winding drum 4. Roll out. At this time, the amount of winding or unwinding of the transmission 25 by the winding pulley 27 and the amount of unwinding or winding of the screen 5 by the winding drum 4 do not always match, but the difference is caused by the deflection and deformation of the differential absorption spring 29. Absorb. Therefore, the screen 5 is always maintained in a tensioned and expanded state.

The reason why the first operation system and the second operation system are provided on the winding drum shaft 11 also as the winding shaft 26 by the winding drum shaft 11 is that the winding mechanism is arranged in one place, This is because the structure is simplified and the structure is simplified as compared with the case where the winding shaft 26 is separately provided. Transmission 25 made of wire rope
Is wound by the cone-shaped winding pulley 27 in such a manner that the difference in the amount of winding or unwinding between the winding pulley 27 and the winding drum 4 is made as small as possible, and the absorbing operation by the differential absorption spring 29 is reduced. This is to avoid applying excessive tension.

[0011]

According to the present invention, the screen 5 is used in the second operation system.
Is pulled out from the winding drum 4, the difference in the amount of winding and unwinding between the winding drum 4 and the winding pulley 27 is absorbed by a differential absorption spring 29 provided between the winding pulley 7 and the winding shaft 26. As a result, the screen 5 can be extended in a state where the screen 5 is always in a flat plate state. Thus, even when the roll screen is used not only in the vertical usage mode but also in the horizontal usage mode, the screen 5 can be reliably covered with the screen 5 and the shielding function can be sufficiently exhibited. In particular, in the horizontal use mode, the screen 5 can be prevented from hanging down by its own weight, and the appearance at the time of extension can be improved.

The second operating system and the first operating system are combined with the winding drum shaft 11.
In the arrangement arranged above, the entire winding mechanism can be collectively provided on one side of the winding drum 4, and further, the winding shaft 26 of the second operation system and the interlocking structure between the winding shaft 26 and the winding shaft 11 are provided. Since there is no need to provide such a structure, the winding mechanism can be downsized as a whole, and its structure can be simplified.

[0013]

1 to 5 show an embodiment of a roll screen according to the present invention. In FIG. 5, reference numeral 1 denotes a daylighting window provided on a roof, on which a roll screen is arranged along a sliding screen surface inside the window. Symbol 2 is the upper frame, 3
Is the lower frame. In FIG. 2, the roll screen includes a winding drum 4 supported by the upper frame 2, a screen 5 wound by the winding drum 4, a winding mechanism for rotating the winding drum 4, and an upper and lower frame for moving and guiding the screen 5. It is composed of three guide wires 6 stretched between two and three.

The winding drum 4 is formed of a metal hollow cylinder, one end of which is supported by a bracket 7 of the upper frame 2 and the other end of which is supported by the bracket 7 of the upper frame 2 via a winding mechanism. An end bar 8 for retaining the shape is fixed to the starting end of the screen 5 and guided and supported by a guide wire 6 via a hanger 9.

The winding mechanism comprises a first operating system for rotating the winding drum 4 in both directions of winding and unwinding, and a second operating system for pulling out the screen 5 from the winding drum 4. In FIG. 3, the first operation system includes a winding drum shaft 11 fixed to the winding drum 4, and a winding drum shaft 11 mounted on the bracket 7.
, Which is rotatably supported on the winding shaft 11, the operation cord 14 wound around the operation pulley 13, and the operation pulley 13. It is composed of a clutch mechanism 15 provided between the body shaft 11 and the like. The bobbin shaft 11 includes an output shaft portion 11a of a clutch mechanism 15 and a bobbin shaft portion 1 internally fitted and connected thereto.
1b, and a second portion is formed on the body shaft portion 11b.
Incorporate an operation system.

The clutch mechanism 15 includes a drive ring 16 that rotates together with the operation pulley 13, a driven ring 17 that is fitted into the output shaft 11a so as to be relatively non-rotatable, and a clutch that is fitted around the bearing boss of the case 12. A sleeve 18,
The clutch 12 includes a first clutch spring 19 and a second clutch spring 20 which are externally mounted on the clutch sleeve 18, and spring receiving claws 21 (see FIG. 4) protruding from the inner surface of the case 12.
Each of the first and second clutch springs 19 and 20 is formed in the shape of a coil spring.
9a and 20a. When the claw pieces 19a and 20a are operated in the winding direction, the coil portion is
To block the rotational force. Nail pieces 19a and 2 in the opposite direction
By operating Oa, the coil part is loosened and the torque can be transmitted.

At the peripheral edges of the drive ring 16 and the driven ring 17, engagement pieces 22 and 23 each having a partial arc shape are protruded along the axial direction, and the claw pieces 19a are operated with these. The engagement piece 22 of the drive ring 16 is
Is rotated to any side in the circumferential direction, the claw piece 19a is operated to the side where the coil portion is loosened, and the engagement piece 23 of the driven ring 17 is rotated together with the claw piece 19a. Driven ring 1
The engaging piece 23 of FIG. 7 shuts the claw piece 19a to shut off the rotational force even when the driven ring 17 rotates to any side. Therefore, power can be transmitted from the operation pulley 13 to the bobbin shaft 11, but power transmission in the opposite direction is prevented.

The second clutch spring 20 is provided in order to avoid overload, and only when the transmission torque from the winding shaft 11 to the operation pulley 13 exceeds a certain value, contrary to the first clutch spring 19. To allow power transmission. The claw piece 20 a of the clutch spring 20 is operated by a spring receiving claw 21 on the inner surface of the case 12.

In FIGS. 2 and 3, the second operating system includes a transmission 25 composed of a wire rope having one end connected to the end bar 8, and a winding shaft 26 utilizing the above-mentioned trunk shaft 11b.
And a take-up pulley 27 rotatably supported on a take-up shaft 26.
And a spring case 28, a differential absorption spring 29 having one end fixed to the winding shaft 26 and the other end fixed to the spring case 28, respectively.
And a guide pulley 30 provided on the lower frame 3 to guide the transfer of the transmission 25.

The winding pulley 27 has a cone-shaped winding surface, and the spiral groove 3 for winding and guiding the transmission 25 along the winding surface.
Form one. The starting end of the transmission 25 is fixed to the large-diameter end of the spiral groove 31, and the transmission 25 is wound up toward the small-diameter end as the screen 5 is fed out from the winding drum 4. This is because the screen 5 is fed and wound by the winding drum 4 and the transmission 25 by the winding pulley 27.
In order to reduce the difference between the amount of winding and the amount of feeding.

The differential absorption spring 29 is formed by a spiral spring, and when the screen 5 is fully wound up on the winding drum 4, an initial tension is applied to the transmission body 25 in a tensioning direction. The operating force output to the barrel shaft portion 11 b via the clutch mechanism 15 is transmitted to the take-up pulley 27 via the differential absorption spring 29 and the spring case 28.

Next, the operation of the second operation system will be mainly described. When the operation pulley 13 is rotated by the operation cord 14 and the winding drum 4 is rotated to the unwinding side, the rotation of the drum shaft 11b serving also as the winding shaft 26 is achieved. The rotational force is transmitted to the winding pulley 27 via the differential absorption spring 29 and the spring case 28, and the winding pulley 27 winds up the transmission 25 while rotating in the same direction as the winding drum 4. At this time, the amount by which the transmission 25 is wound by the winding pulley 27 does not always match the amount by which the screen 5 is unwound from the winding drum 4.

If the amount of the screen 5 extended is larger, the screen 5 tends to hang under its own weight. However, since the initial tension is applied to the differential absorption spring 29, the difference between the amount of extension of the screen 5 and the amount of winding of the transmission 25 is absorbed by the differential absorption spring 29. Therefore, the screen 5 is stretched while being tensed. On the other hand, when the amount of feeding of the screen 5 becomes smaller than the amount of winding of the transmission 25, the differential absorption spring 29 is tightened in a direction to absorb the difference. That is, the take-up pulley 27 slips with respect to the barrel shaft 11b. Therefore, no excessive tension acts on the screen 5.

The operation code 14 during the extension of the screen 5
When the operation is stopped, the winding drum 4 receives a rotational force due to the stretching tension acting on the screen 5 and tries to rotate in that direction. However, this rotational force is interrupted by the clutch mechanism 15 and the rotation of the winding drum shaft 11 is forcibly stopped, so that
The screen 5 continues to maintain the extended state. At this time, there is a slight time lag before the clutch mechanism 15 starts to work, and the winding drum 4 slightly extends and rotates. However, since this movement is absorbed by the differential absorption spring 29, the operation of the operation pulley 13 can be controlled at any position. Even when stopped, the screen 5 does not hang down.

When the screen 5 is wound by the winding drum 4, the differential absorption spring 29 absorbs the difference between the feeding amount and the winding amount in the same manner as described above. Therefore, the screen 5 can block the daylighting window 1 in parallel with the sash surface, and can effectively prevent transmission of light, sound, and the like.

The roll screen of the present invention can have the following modifications. A take-up pulley 27, a spring case 28, and a differential absorption spring 29 are arranged outside the case 12,
The center end of the differential absorption spring 29 is fixed to the output shaft portion 11a protruding outside the case 12. A first operation system is arranged at one end of the winding drum 4, and a second operation system is arranged at the other end. The first on one end of the winding drum 4
The operation system is arranged at both ends with the second operation system. The winding shaft 26 is formed independently, and is supported in parallel with the winding drum shaft 11, and then the both shafts 11 and 26 are operably connected by a gear or a winding transmission mechanism. The second operation system is arranged on the winding shaft 26. When the extension length of the screen 5 is relatively short, the winding pulley 27 does not necessarily need to have a cone shape.
It may be a pulley provided with a parallel cylindrical winding drum. In this case, a belt such as a stainless tape can be used as the transmission 25. The transmission 25 is branched between the lower frame 3 and the winding pulley 27, but the branched transmission 25 can be formed by a single wire rope. Connect both ends of the wire rope passed through the hollow end bar 8 to the end bar 8
Of each rope, and pull each rope end to guide pulley 30
Is connected to the branch metal fitting via the. According to such a transmission 25, the end bar 8 can always be pulled evenly by absorbing the difference in the amount of movement between the left and right wire ropes. The clutch mechanism 15 does not need to use a coil spring-like clutch spring as an intermittent element. As the differential absorption spring 29, a spiral spring is preferable because of its large absorption capacity.
If the required absorption is relatively small, other springs such as tension coil springs and torsion coil springs can be used. The operation pulley 13 can be configured to be operated electrically instead of being operated manually.

[Brief description of the drawings]

FIG. 1 is a principle explanatory view showing a winding mechanism of a roll screen.

FIG. 2 is a perspective view schematically showing a roll screen.

FIG. 3 is a vertical sectional front view showing a winding mechanism.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is an explanatory diagram showing an example of using a roll screen.

[Explanation of symbols]

 Reference Signs List 4 winding drum 5 screen 11 winding drum shaft 13 operation pulley 15 clutch mechanism 25 transmission body 26 winding shaft 27 winding pulley 29 differential absorption spring 31 spiral groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-304193 (JP, A) JP-A-4-73392 (JP, A) JP-A-1-192983 (JP, A) 9481 (JP, U) Jikken 63-907 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E06B 9/56 E06B 9/40

Claims (4)

(57) [Claims] A screen 5; a winding drum 4 for winding the screen 5; and a winding mechanism for rotating the winding drum 4. The winding mechanism rotates the winding drum 4 in both directions of winding and unwinding. A first operating system, and a second operating system for pulling out the screen 5 from the winding drum 4. The first operating system includes an operating pulley 13 rotatably supported by the winding shaft 11. The second operation system includes a clutch mechanism 15 that is provided between the operation pulley 13 and the winding drum shaft 11 and that shuts off only a rotational force transmitted from the winding drum 4 to the operation pulley 13. 5, a windable transmission 25 connected to the feeding start end, a winding shaft 26 that rotates in conjunction with the winding drum shaft 11, and the transmission 25 is supported by the winding shaft 26 so as to freely rotate, and winds the transmission 25. Winding pulley 27 and one end of winding shaft 26 The other end includes a differential absorption spring 29 which is connected to the winding pulley 27, the differential absorption spring 29, all screen 5 within the winding drum 4
In the fully wound state, the transmission 25 is tensioned.
The initial tension is applied in the direction in which the transmission 25 is wound.
The amount of unwinding and winding of the screen 5 by the winding drum 4 or
The difference with the feeding amount is changed by the
A roll screen that is shaped and absorbed . 2. The roll screen according to claim 1, wherein a second operation system is disposed on the winding shaft 11 adjacent to the first operation system, and the winding shaft 11 also serves as a winding shaft 26. 3. The transmission 25 is made of a wire rope, the winding surface of the winding pulley 27 is formed in a cone shape, and a spiral groove 31 for winding and guiding the transmission 25 is formed on the winding surface of the winding pulley 27. When the screen 5 is fully wound, the transmission 25
2. The winding start end of the spiral groove 31 is located at the large diameter end of the spiral groove 31.
Or the roll screen of 2. 4. A roll screen which is stretched sideways, in which a plurality of guide wires 6 are arranged along a stretched surface of the screen 5, and an end bar 8 fixed to a feeding start end of the screen 5 is provided with a hanging member 9. The roll screen according to claim 1, 2 or 3, wherein the roll screen is guided and supported by a guide wire (6).