CN106460453B - Rolling screen - Google Patents

Abstract

The rolling curtain provided by the invention can enable the double-layer curtain cloth to relatively move along the vertical direction; the rolling screen (1) of the invention is provided with an operation plate (6), and when in operation, the operation plate (6) performs pendulum motion in a mode of increasing the interval of the double-layer curtain cloth (4) which can move relatively; preferably, the operation plate (6) performs pendulum motion in a manner that the interval of the double-layer curtain cloth (4) during operation is larger than the interval during rest; more preferably, when the operation is stopped, the operation panel (6) performs a pendulum motion by the weight of the double-layer fabric so as to closely adhere the double-layer fabric, and a light transmitting portion (4b) for transmitting a part of the light and a light shielding portion (4a) for shielding the light are alternately formed on the double-layer fabric (4).

Description

Rolling screen

Technical Field

The present invention relates to a roll screen (roller screen) capable of moving a double-ply fabric in a vertical direction.

Background

In the related art, there is a rolling blind capable of adjusting the amount of lighting in a room by relatively moving a double-layered curtain cloth in the vertical direction.

The curtain fabric of the rolling curtain is alternately provided with a light transmitting part for transmitting partial light and a light shielding part for shielding the light in a stripe shape, and the curtain fabric hangs down in a double-layer overlapping state. Further, the front and rear fabrics can be moved relatively in the vertical direction by the operation of the operating mechanism, and the degree of overlap between the light transmitting portion and the light blocking portion can be adjusted, thereby adjusting the lighting amount.

For example, the following configurations are disclosed: in order to easily adjust the length of the curtain, when one end of the curtain is fixed to a winding rod and the other end of the curtain, which hangs down from the winding rod and is folded back via a weight member, is fixed to a fixing member, the other end of the curtain is accommodated in the fixing member so that the length of the curtain can be adjusted (see, for example, patent document 1). In this structure, a gap is formed between the double-ply cords, and the double-ply cords are not closely attached to each other.

On the other hand, a structure is disclosed in which a double-ply fabric can be smoothly raised or lowered while maintaining a close contact state (for example, see patent document 2).

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese patent and Japanese laid-open patent publication No. 2009-79430

Patent document 2: japanese patent, Japanese patent No. 3311994

Disclosure of Invention

In the technique disclosed in patent document 1, since there is a gap between the double layer fabrics, the double layer fabrics move relative to each other during the lifting operation without generating friction, and therefore, it is effective in preventing damage to the fabrics. However, this technique has the following problems: even if the light-transmitting portion and the light-shielding portion of the fabric are completely overlapped to form a light-shielding state, light is leaked from the gap of the fabric, and complete light shielding cannot be achieved.

On the other hand, in the technique disclosed in patent document 2, since the double-ply fabric is held in close contact with each other, it is effective in preventing light from leaking from the gap of the fabric when the light-transmitting portion of the fabric and the light-shielding portion completely overlap each other and are in the light-shielded state. However, this technique has the following problems: the double-layer curtain cloth moves relatively in a close state during the lifting operation, so that the curtain cloth can be damaged.

The present invention has been made in view of the above problems, and an object thereof is to provide a roller blind in which a relatively movable double-ply fabric is relatively moved in the vertical direction.

The rolling shutter of the present invention is a rolling shutter capable of relatively moving a double-layer curtain cloth in a vertical direction, and is characterized by comprising an operating mechanism which performs pendulum motion so as to increase an interval between the double-layer curtain cloth configured to be relatively movable when operated.

Further, the rolling shutter of the present invention is characterized in that: the operating mechanism performs pendulum movement in such a manner that the interval of the double-layer curtain cloth during operation is greater than the interval of the double-layer curtain cloth during rest.

Further, the rolling shutter of the present invention is characterized in that: when the operation is stopped, the operation mechanism performs pendulum motion in a mode of enabling the double-layer curtain cloth to be attached tightly under the action of the self weight of the double-layer curtain cloth.

Further, the rolling shutter of the present invention is characterized in that: the double-layer curtain cloth is alternately provided with light-transmitting parts for transmitting partial light and light-shielding parts for shielding the light.

Further, the rolling shutter of the present invention is characterized in that: the double-layer cord fabric is formed by folding a cord fabric; the roller shutter is provided with a winding pipe and a support shaft, one side of the curtain cloth is installed on the winding pipe, the curtain cloth is suspended and supported on the winding pipe in a windable mode, and the other side of the curtain cloth, which hangs down from the winding pipe and is folded back through a counterweight component, is installed and supported on the support shaft; the operating mechanism performs a pendulum motion so that a positional relationship between the take-up tube and the support shaft changes between a positional relationship at a time of rest and a positional relationship at a time of operation.

In the rolling shutter according to the present invention, the operating mechanism is configured to have a force receiving point which is engaged with an operating cord for operating opening and closing operations of the double-layer curtain fabric, and to be biased by a tensile force of the operating cord at the time of the operation, so that the operating mechanism is rotated together with the support shaft in a direction in which the double-layer curtain fabric is separated.

Further, the rolling shutter of the present invention is characterized in that: the support shaft is disposed below the winding pipe and at a position close to the indoor side.

Further, the rolling shutter of the present invention is characterized in that: the double-layer cord fabric is formed by folding a cord fabric; the curtain is provided with a winding pipe and a fixing member (a mounting bracket in the example of the embodiment described later), one side of the curtain cloth is mounted on the winding pipe, the curtain cloth is suspended and supported on the winding pipe in a windable manner, and the other side of the curtain cloth, which hangs down from the winding pipe and is folded back through a counterweight member, is mounted and supported at a position above the winding pipe through the fixing member; the operation mechanism includes an operation unit that performs a pendulum motion when operated by an operation rope, and a fabric interval adjustment member (a movable flap or a fixed lever in an example of an embodiment described later) that operates to increase an interval of the double-ply fabric in accordance with the pendulum motion of the operation unit.

Further, the rolling shutter of the present invention is characterized in that: the fabric gap adjusting member includes a movable flap that presses the fabric so as to increase the gap between the double-layer fabrics in accordance with the pendulum movement of the operation unit, and a base shaft of the movable flap is fixed to the fixing member.

Further, the rolling shutter of the present invention is characterized in that: the movable flap has a length sufficient to close the gap between the fixed member and the winding tube.

Further, the rolling shutter of the present invention is characterized in that: the fabric interval adjustment member includes a fixing lever that presses the double-ply fabric so as to increase the interval of the double-ply fabric in accordance with the pendulum movement of the operation unit, and is fixed to a part of the operation unit.

Further, the rolling shutter of the present invention is characterized in that: the operation unit is provided with a rotation restricting member that restricts a rotation range of the pendulum motion.

Further, the rolling shutter of the present invention is characterized in that: the operation unit has a rope guide portion that guides the hanging of the operation rope and supports the operation rope so as to cause the operation unit to perform a pendulum motion.

Further, the rolling shutter of the present invention is characterized in that: the operating mechanism is provided with an operating rope consisting of a ball chain formed by connecting a plurality of ball parts; the cord guide portion is configured to: at least two of the ball portions connected at a predetermined pitch are always brought into contact with the rope guide portion to be guided.

Further, the rolling shutter of the present invention is characterized in that: the fixing member has a fabric pressing plate that can be wound around an end of the fabric to adjust the length of the fabric, and a fixing portion to which the fabric pressing plate is detachably fixed.

(effect of the invention)

According to the present invention, the double-ply curtain moves relatively without friction, or friction is generated only at a partial stage in the lifting process, or the friction force is weakened during the lifting operation, so that there is no possibility of damaging the curtain. In addition, the interval between the double-layer cords can be reduced or the double-layer cords can be closely attached to each other when the fabric is in a static state, and particularly, in the cord having the light-transmitting portion and the light-shielding portion, the light-shielding property can be improved when the light-transmitting portion and the light-shielding portion are completely overlapped to form a light-shielding state.

Drawings

Fig. 1 is a front view showing a schematic configuration of a roll screen according to a first embodiment of the present invention.

Fig. 2 is a side view showing a schematic configuration of a roll screen according to a first embodiment of the present invention.

Fig. 3 is an exploded perspective view showing a schematic configuration around an operation panel in the roll screen according to the first embodiment of the present invention.

Fig. 4 (a), (b), and (c) are diagrams illustrating the operation of the operation panel in the roller shutter according to the first embodiment of the present invention.

Fig. 5 is a front view showing a schematic configuration of a roll screen according to a second embodiment of the present invention.

Fig. 6 is an exploded perspective view showing a schematic configuration around an operation panel in a roll screen according to a second embodiment of the present invention.

Fig. 7 (a), (b), and (c) are views for explaining the operation of the operation panel in the roll screen according to the second embodiment of the present invention.

Fig. 8 is a front view showing a schematic configuration of a roll screen according to a third embodiment of the present invention.

Fig. 9 is an exploded perspective view showing a schematic configuration around an operation panel in a roller shutter according to a third embodiment of the present invention.

Fig. 10 (a), (b), and (c) are diagrams for explaining the operation of the operation panel in the roller shutter according to the third embodiment of the present invention at rest.

Fig. 11 (a) and (b) are views for explaining the operation of the operation panel in the roller shutter according to the third embodiment of the present invention.

Fig. 12 (a) and (b) are diagrams illustrating an operation panel in a roller shutter according to a third embodiment of the present invention, in comparison with a comparative example.

Fig. 13 is an exploded perspective view showing a schematic configuration around an operation panel in a roll screen according to a fourth embodiment of the present invention.

Fig. 14 (a), (b), and (c) are views for explaining the operation of the operation panel in the roller shutter according to the fourth embodiment of the present invention.

Fig. 15 is a front view showing a schematic configuration of a roll screen according to a fifth embodiment of the present invention.

Fig. 16 is a side view showing a schematic configuration of a rolling shutter according to a fifth embodiment of the present invention.

Fig. 17 is an exploded perspective view showing a schematic configuration around an operation unit in a roller shutter according to a fifth embodiment of the present invention.

Fig. 18 (a), (b), and (c) are diagrams for explaining the operation of the operation means in the roller shutter according to the fifth embodiment of the present invention.

Fig. 19 (a), (b), and (c) are diagrams illustrating the operation of the operation unit according to the modified example of the roll screen according to the fifth embodiment of the present invention.

Fig. 20 is a front view showing a schematic configuration of a roll screen according to a sixth embodiment of the present invention.

Fig. 21 is an exploded perspective view showing a schematic configuration around an operation unit in a roller shutter according to a sixth embodiment of the present invention.

Fig. 22 is a front view showing a schematic configuration of a roll screen according to a seventh embodiment of the present invention.

Fig. 23 is an exploded perspective view showing a schematic configuration around an operation unit in a roller shutter according to a seventh embodiment of the present invention.

Fig. 24 (a), (b), and (c) are views for explaining the operation of the operation means in the roller shutter according to the seventh embodiment of the present invention.

(symbol description)

1 Rolling screen

2 mounting rack

2a, 2b support member

2c fixed part

3 operating rope

4 cord fabric

Shading part of 4a curtain cloth

4b light-transmitting part of cord fabric

5 lower beam

6 operation panel

6a, 6b operation panel member

7 support shaft

8 support plate

9 winding tube

10 operating pulley

11 fixed shaft

12. 13, 14 cord guide

15 roller

16 fulcrum shaft

23 rotation receiving part

27 rotating shaft hole part

31 drive gear

32 drive gear

33 driven gear

40 Movable wing

50 fixed rod

60 operating unit

61 protruding piece

80 surface fabric clamp plate

Detailed Description

Hereinafter, a roll screen (1) according to each embodiment of the present invention will be described with reference to the drawings. In the present specification, the front view of the roll screen 1 shown in fig. 1 and the like will be defined as "upper" (or "upper side") and "lower" (or "lower side") with reference to the vertical direction of the screen 4, the left side of the figure will be defined as "left side" of the roll screen 1, and the right side of the figure will be defined as "right side" of the roll screen 1. In the following description, in the front view of the roll screen 1 shown in fig. 1, the side that can be seen is referred to as the "front side" (or "indoor side"), the opposite side is referred to as the "rear side" (or "outdoor side"), and the direction perpendicular to the plane of the front view of fig. 1 is referred to as the front-rear direction of the roll screen 1.

[ first embodiment ]

First, the structure of the roller blind 1 according to the first embodiment of the present invention will be described with reference to fig. 1 to 4. Fig. 1 is a front view showing a schematic configuration of a roll screen 1 according to a first embodiment of the present invention, and fig. 2 is a side view showing a schematic configuration of the roll screen 1 according to the first embodiment of the present invention. Fig. 3 is an exploded perspective view showing a schematic configuration around the operation panel 6 in the roll screen 1 according to the first embodiment of the present invention. Fig. 4 (a), (b), and (c) are diagrams illustrating the operation of the operation panel 6 in the roll screen 1 according to the first embodiment of the present invention.

In the roll screen 1 shown in fig. 1 and 2, support members 2a and 2b are fixed to both ends of a mounting frame 2, and a cylindrical winding tube 9 is rotatably supported between the support members 2a and 2b by a fixed shaft 11 extending from the support members 2a and 2 b.

An operation pulley 10 is provided at the right end of the winding pipe 9, and the endless operation rope 3 is wound around the operation pulley 10 and hangs down therefrom. Further, the roller shutter 1 is configured to: the winding pipe 9 can be rotated by operating the operation cord 3, and the surface of the operation pulley 10 around which the operation cord 3 is wound has a high-friction surface shape. The operation cord 3 may be formed of a ball chain (ballchain), and the surface of the operation pulley 10 around which the ball chain is wound may be formed to have an uneven shape corresponding to the ball portion of the ball chain.

An operation plate 6 is provided between the support member 2a and the operation pulley 10 so as to be rotatable with respect to the winding pipe 9. One end of a cylindrical support shaft 7 extending between the support members 2a, 2b is attached to a lower portion of the operation plate 6. The specific configuration and operation of the operation panel 6 will be described in detail later.

Further, a support plate 8 is provided between the support member 2b and the left end portion of the windup tube 9 so as to be rotatable with respect to the windup tube 9, and the other end of the support shaft 7 is attached to a lower portion of the support plate 8. The shape of the support plate 8 of the present embodiment is substantially the same as the shape of the operation plate 6, except that the string guide portions 12 and 13 described later are not provided. However, the outer shape of the support plate 8 may be different from the outer shape of the operation plate 6 as long as the support plate is rotatable with respect to the winding pipe 9 and the other end of the support shaft 7 can be attached.

One side of the fabric 4 is attached to the winding pipe 9, and the fabric 4 is suspended and supported on the winding pipe 9 in a windable manner, and the other side of the fabric 4, which hangs down from the winding pipe 9 and is folded back via a bottom rail 5 functioning as a weight member, is attached to the support shaft 7. A roller 15 is inserted into the lower end of the fabric 4 hanging down from between the winding pipe 9 and the support shaft 7, and the roller 15 is rotatably supported at both ends of the lower beam 5. Therefore, the curtain cloth 4 is provided to be applied with tension by the weight of the under beam 5.

When the operation cord 3 is operated to rotate the take-up tube 9 in the cord winding direction, the underbeam 5 is raised, and when the take-up tube 9 is rotated in the cord unwinding direction, the underbeam 5 is lowered.

Further, a spring motor (spring motor) for reducing an operation force when the curtain cloth 4 is wound up is housed in a left end side position inside the winding tube 9, and a brake device or the like (not shown) for preventing the curtain cloth 4 from being lowered by its own weight is housed in a right end side position.

Since the fabric 4 is suspended and supported in a state of being overlapped in two layers by alternately forming the light transmitting portions 4b for transmitting partial light and the light shielding portions 4a for shielding light in a stripe shape on the fabric 4, the fabric 4 in front and rear is relatively moved in the vertical direction by the operation of the operation cord 3, the overlapping degree of the light transmitting portions 4b and the light shielding portions 4a can be adjusted, and the lighting amount can be adjusted.

Next, a specific configuration of the operation panel 6 and its periphery will be described with reference to fig. 1, 2, and 3. The operation pulley 10 is provided with a through hole so that a fixed shaft 11 extending from the support member 2a serves as a rotation shaft, and the winding pipe 9 is supported by the fixed shaft 11 so as to be rotatable together with the rotation of the operation pulley 10. For this purpose, a fitting portion 25 that fits the right end inner peripheral surface of the winding pipe 9 is provided on the left end side of the operation pulley 10. The left end of the operating pulley 10 is engaged with a gear mechanism (not shown) connected to a brake device housed in the winding pipe 9. When the speed increase or the speed reduction is not required, the gear mechanism may be omitted and the winding pipe 9 may be directly connected to the operation pulley 10.

The right end of the operation pulley 10 is provided with a substantially cylindrical rotation support portion 24, and the operation plate 6 is provided with a circular hole-shaped rotation receiving portion 23 having a diameter slightly larger than the rotation support portion 24. Therefore, the operation plate 6 is supported to be rotatable with respect to the operation pulley 10 and the winding pipe 9.

A hole portion 22 capable of supporting the support shaft 7 is provided in a lower portion of the operation plate 6. One end of the support shaft 7 can be attached to the operation plate 6 by a holding member 21 such as a rivet, and the support shaft 7 is held so as to extend between the support members 2a, 2 b. The support shaft 7 may be attached to be rotatable with respect to the operation panel 6 or may be attached to be non-rotatable with respect to the operation panel 6. When a ratchet mechanism or the like is provided that is rotatable and can be held at a rotational position, the height of the underbeam 5 can be finely adjusted when the curtain 4 is in the lower limit state.

In fig. 2, the following configuration may be adopted: the operation plate 6 can be prevented from being relatively rotated clockwise by an angle exceeding a certain angle.

Further, a fixing member (not shown) fixed to the fixed shaft 11 (or the support member 2a) is provided with a rope cover 20 for preventing the operation rope 3 wound around the operation pulley 10 from slipping off the operation pulley 10.

In the illustrated example, two cord guide portions 12 and 13 extending in a cylindrical shape are provided on the left end surface of the operation panel 6. The rope guide portion 12 guides one side (front side) of the endless operation rope 3 hanging from the operation pulley 10 to hang from above the rope guide portion 12, and the rope guide portion 13 guides the other side (rear side) of the endless operation rope 3 hanging from the operation pulley 10 to hang from above the rope guide portion 13 and below the rope guide portion 12 (see fig. 2).

The operation panel 6 thus configured is configured to: when the operation cord 3 is operated, the operation panel 6 performs a pendulum motion (pendulum motion) so as to increase the interval between the relatively movable double plies 4. In particular, the operation plate 6 performs a pendulum motion so that the positional relationship between the take-up tube 9 and the support shaft 7 changes between the positional relationship at the time of rest and the positional relationship at the time of operation. Further, the operation panel 6 is configured to: the interval of the double-layer curtain cloth 4 is larger when in operation than when in rest.

The operation of the operation panel 6 will be described in more detail below with reference to fig. 4. First, referring to fig. 4 (a), the operation plate 6 is supported to be rotatable with respect to the operation pulley 10 and the winding pipe 9, and when the lower beam 5 is in a stationary state at the lower limit position, the intermediate position, and the upper limit position, respectively, a torque (torque) is applied to the operation plate 6 in a direction in which the front and rear fabrics 4 are brought into close contact, that is, in a front surface side (clockwise direction in fig. 4 (a)) by its own weight (weight of the fabrics 4, the lower beam 5, the operation plate 6, the support plate 8, and the support shaft 7). The operation cord 3 hangs down with the cord guide portions 12 and 13 as a reference.

In a stationary state in which the bottom rail 5 is at the lower limit position, or in a stationary state in which the bottom rail 5 is at the intermediate position or the upper limit position and the ply 4 is wound around the winding pipe 9 at the winding diameter R, the interval of the double plies 4 is constant when the double plies 4 are at a position (interval d1 of the double plies 4) at which they approach or abut each other. Therefore, the translucent portion 4b of the double-layer fabric 4 can be shifted from the light-shielding portion 4a to be in the translucent state, or the translucent portion 4b of the fabric 4 can be completely overlapped with the light-shielding portion 4a to be in the light-shielding state, and particularly, the light-shielding property in the light-shielding state can be improved. In addition, from the viewpoint of improving the light-shielding performance of the double-ply fabric 4, it is preferable that the upper end of the fabric 4 is attached to the winding tube 9 and the support shaft 7 so that the position where the fabric 4 hangs down from the winding tube 9 and the support shaft 7 in the lower limit state is overlapped in the front-rear direction.

Next, referring to fig. 4 (b), when the lower beam 5 is raised by operating the operation cord 3 from a state in which the lower beam 5 is at the lower limit position or the intermediate position, for example, the curtain 4 is wound around the winding pipe 9. At this time, the operation cord 3 abuts on the cord guide 12 on the indoor side to apply a counterclockwise torque to the operation panel 6, and the operation panel 6 is driven to perform a pendulum motion, so that the interval d2 when the double-layer curtain 4 is operated is made larger than the interval d1 when the double-layer curtain 4 is at rest. Therefore, at the time of the lifting operation, the double-ply fabric 4 relatively moves without generating friction, or only generates friction at a partial stage in the lifting process, or the friction force is weakened, so that there is no possibility of damaging the fabric 4.

Similarly, referring to fig. 4 (c), when the lower beam 5 is lowered by operating the operation cord 3 from a state in which the lower beam 5 is at the intermediate position or the upper limit position, for example, the curtain fabric 4 wound around the winding pipe 9 is lowered. At this time, the operation cord 3 abuts on the cord guide portion 13 on the indoor side to apply a counterclockwise torque to the operation panel 6, and the operation panel 6 is driven to perform a pendulum motion, whereby the interval d3 in the operation of the double-layer curtain 4 is made larger than the interval d1 in the rest state. Therefore, at the time of the lowering operation, the double-ply fabric 4 relatively moves without generating friction, or friction is generated only at a partial stage in the raising and lowering process, or the friction force is weakened, so that there is no possibility of damaging the fabric 4. Even if friction is locally generated when the fabric winding thickness of the cord fabric 4 approaches its upper limit, the frictional force tends to be reduced.

Therefore, in the roll screen 1 of the first embodiment, the operating plate 6 is rotated by the tensile force of the operating cord 3 at the time of the up-and-down operation, so that the double-layered fabrics 4 are relatively moved in a state of being separated from each other without friction (or friction is weakened even if friction is generated), and thus there is no possibility (or a possibility of damage to the fabrics 4 is reduced). Further, when the double-layer fabric 4 is in the stationary state, the operating cord 3 loses tension, and the operating plate 6 is rotated in the direction of approaching the double-layer fabric 4 by the weight of the fabric 4 or the like, so that the interval between the double-layer fabric 4 can be reduced or the double-layer fabric 4 can be brought into close contact with each other, and the light shielding property can be improved when the light transmitting portion 4b of the fabric 4 and the light shielding portion 4a are completely overlapped to form the light shielding state.

[ second embodiment ]

Next, the structure of the roller blind 1 according to the second embodiment of the present invention will be described with reference to fig. 5 to 7. Fig. 5 is a front view showing a schematic configuration of a roll screen 1 according to a second embodiment of the present invention, and fig. 6 is an exploded perspective view showing a schematic configuration around an operation panel 6 in the roll screen 1 according to the second embodiment of the present invention. Fig. 7 (a), (b), and (c) are diagrams illustrating the operation of the operation panel 6 in the roll screen 1 according to the second embodiment of the present invention. The same reference numerals are given to constituent members that exhibit the same functions as those of the first embodiment.

The other configuration of the roll screen 1 of the second embodiment shown in fig. 5 is substantially the same as that of the first embodiment, except that the shapes of the support member 2a (and the support member 2b) and the operation panel 6 (and the support plate 8) are different. Therefore, in the following description, the support member 2a and the operation panel 6 of the second embodiment will be mainly described.

A specific configuration of the operation panel 6 and its periphery according to the second embodiment will be described with reference to fig. 6. At the right end portion of the windup tube 9, the windup tube 9 is supported rotatably with respect to a fixed shaft 11 extending from the support member 2a, as in the first embodiment. The operating pulley 10 is provided with a through hole to have the fixed shaft 11 as a rotation axis. The winding pipe 9 can rotate in accordance with the rotation of the operating pulley 10.

As in the first embodiment, a substantially cylindrical rotation support portion 24 is provided at the right end of the operation pulley 10. However, the operation plate 6 of the second embodiment is provided with a rotation receiving portion 23 having a larger diameter than the rotation supporting portion 24 and having a long hole shape. The long hole-shaped rotation receiving portion 23 is formed by: the fixed shaft 11 is supported by the fixed shaft and is rotatable with respect to a support shaft 16, which will be described later, and the angle of relative rotation is limited to a certain angle or less. The support plate 8 of the present embodiment has substantially the same shape as the operation plate 6 of the present embodiment, and is provided with a rotation receiving portion 23 (not shown) having a long hole shape as the operation plate 6 of the present embodiment.

Further, a pivot shaft hole portion 27 through which the pivot shaft 16 extending from the support member 2a is inserted is provided at a position above the outdoor side of the operation plate 6 of the second embodiment so that the operation plate 6 performs a pendulum motion with the pivot shaft 16 as a pivot shaft. Similarly, a pivot shaft hole 27 (not shown) through which the pivot shaft 16 extending from the support member 2b is inserted is also provided at a position above the support plate 8 on the outdoor side, so that the support plate 8 performs a pendulum motion about the pivot shaft 16. Further, the following may be configured: the operation plate 6 and the support plate 8 are provided with support shafts 16, respectively, and the support members 2a and 2b are provided with pivot shaft holes 27, respectively.

Therefore, the operation plate 6 and the support plate 8 of the second embodiment can be rotated with respect to the operation pulley 10 and the windup tube 9 with the support shaft 16 as a rotation shaft and with the rotation range thereof restricted by the elongated rotation receiving portion 23.

As in the first embodiment, another member, not shown, including the rope cover 20 is provided on the fixed shaft 11 above the operation plate 6. The string cover 20 may be attached to the support member 2 a. In a lower portion of the operation plate 6, a hole portion 22 capable of supporting the support shaft 7 is provided. One end of the support shaft 7 can be attached to the operation plate 6 by a holding member 21 such as a rivet, and the support shaft 7 is held so as to extend between the support members 2a, 2 b. The support shaft 7 may be attached to be rotatable with respect to the operation panel 6 or may be attached to be non-rotatable with respect to the operation panel 6. When a ratchet mechanism or the like is provided that is rotatable and can be held at a rotational position, the height of the underbeam 5 when the curtain 4 is at the lower limit position can be finely adjusted.

However, the operation panel 6 according to the second embodiment is not provided with the two cord guide portions 12 and 13 as in the first embodiment. Instead, the support shaft 7 is disposed on the front side of the curtain fabric 4, and the operation cord 3 is passed through the back side of the support shaft 7. Therefore, in the present embodiment, the support shaft 7 is configured to have functions corresponding to the rope guide portions 12 and 13 of the first embodiment. Further, a rope guide portion 14 is provided at the lower end portion of the support member 2a, and the operation rope 3 hangs down from the front surface side of the rope guide portion 14. That is, the loop-shaped operation cord 3 hanging down from the operation pulley 10 passes around the outside of the room of the support shaft 7, and then hangs down from above the cord guide portion 14 under the guide of the cord guide portion 14 (see fig. 5). The shape of the support member 2b is substantially the same as that of the support member 2a except that the string guide part 14 is not provided.

Therefore, the operation panel 6 of the second embodiment is also configured to: when the operation cord 3 is operated, the pendulum motion is performed so as to increase the interval between the relatively movable double layer fabrics 4. In particular, the operation plate 6 performs a pendulum motion so that the positional relationship between the take-up tube 9 and the support shaft 7 changes between the positional relationship at the time of rest and the positional relationship at the time of operation. Further, the operation panel 6 is configured to: the interval of the double-layer curtain cloth 4 is larger when in operation than when in rest. In addition, the cord guide 14 is not an essential part for pendulum movement. In addition, the following may be formed: two cord guide portions 12, 13 as in the first embodiment are provided on the front surface side of the fabric 4 below the winding tube, and the operation cord 3 is passed through the back surfaces of the cord guide portions 12, 13. The portion of the support shaft 7 that contacts the operation cord 3 may be formed as another rotatable member to reduce the resistance.

Hereinafter, the operation of the operation panel 6 according to the second embodiment will be described in more detail with reference to fig. 7. First, referring to (a) in fig. 7, the operation plate 6 is supported such that: the support shaft 16 is rotatable with respect to the operation pulley 10 and the take-up pipe 9 as a rotation axis, and when the lower beam 5 is in a stationary state at the lower limit position, the intermediate position, and the upper limit position, respectively, a torque directed in a direction in which the front and rear fabrics 4 are closely attached, that is, a front side (clockwise direction in fig. 7 a) is applied to the operation plate 6 by its own weight (weight of the fabric 4, the lower beam 5, the operation plate 6, the support plate 8, and the support shaft 7). The operation cord 3 is suspended from the cord guide portion 14 provided in the support member 2 a.

In a stationary state in which the bottom rail 5 is at the lower limit position, or in a stationary state in which the bottom rail 5 is at the intermediate position or the upper limit position and the ply 4 is wound around the winding pipe 9 at the winding diameter R, the interval of the double plies 4 is constant when the double plies 4 are at a position (interval d1 of the double plies 4) at which they approach or abut each other. Therefore, the translucent portion 4b of the double-layer fabric 4 can be shifted from the light-shielding portion 4a to be in the translucent state, or the translucent portion 4b of the fabric 4 can be completely overlapped with the light-shielding portion 4a to be in the light-shielding state, and particularly, the light-shielding property in the light-shielding state can be improved. In addition, from the viewpoint of improving the light-shielding performance of the double-ply fabric 4, it is preferable that the upper end of the fabric 4 is attached to the winding tube 9 and the support shaft 7 so that the position where the fabric 4 hangs down from the winding tube 9 and the support shaft 7 in the lower limit state is overlapped in the front-rear direction.

Next, referring to fig. 7 (b), when the lower beam 5 is raised by operating the operation cord 3 from a state in which the lower beam 5 is at the lower limit position or the intermediate position, for example, the curtain 4 is wound around the winding pipe 9. At this time, the operating cord 3 applies a torque to the support shaft 7 with the cord guide 14 as a support shaft, and the operating panel 6 is driven to perform a pendulum motion, whereby the interval d2 during operation of the double curtain 4 is made larger than the interval d1 during rest. Therefore, at the time of the lifting operation, the double-ply fabric 4 relatively moves without generating friction, or only generates friction at a partial stage in the lifting process, or the friction force is weakened, so that there is no possibility of damaging the fabric 4.

Similarly, referring to fig. 7 (c), when the lower beam 5 is lowered by operating the operation cord 3 from a state in which the lower beam 5 is at the intermediate position or the upper limit position, for example, the curtain fabric 4 wound around the winding pipe 9 is lowered. At this time, the operating cord 3 applies a torque to the support shaft 7 with the cord guide 14 as a support shaft, and the operating panel 6 is driven to perform a pendulum motion, whereby the interval d3 during operation of the double curtain 4 is made larger than the interval d1 during rest. Therefore, at the time of the lowering operation, the double-ply fabric 4 relatively moves without generating friction, or friction is generated only at a partial stage in the raising and lowering process, or the friction force is weakened, so that there is no possibility of damaging the fabric 4.

Therefore, in the roll screen 1 of the second embodiment, the operating plate 6 is rotated by the tensile force of the operating cord 3 during the up-and-down operation, so that the double-layered fabrics 4 are relatively moved in a state of being separated from each other without friction (or friction is weakened even if friction occurs), and there is no possibility of damaging the fabrics 4. Further, when the double-layer fabric 4 is in the stationary state, the operating cord 3 loses tension, and the operating plate 6 is rotated in the direction of approaching the double-layer fabric 4 by the weight of the fabric 4 or the like, so that the interval between the double-layer fabric 4 can be reduced or the double-layer fabric 4 can be brought into close contact with each other, and the light shielding property can be improved when the light transmitting portion 4b of the fabric 4 and the light shielding portion 4a are completely overlapped to form the light shielding state.

In particular, in the roll screen 1 of the second embodiment, the installation space of the front-rear width of the roll screen 1 based on the pendulum movement of the operation panel 6 can be made smaller than that of the first embodiment. Further, by providing the cord guide portion 14, when the operation cord 3 is pulled downward, the operation panel 6 and the support panel 8 can be rotated in a direction to separate the double-ply fabric 4.

[ third embodiment ]

Next, the structure of the roller blind 1 according to the third embodiment of the present invention will be described with reference to fig. 8 to 12. Fig. 8 is a front view showing a schematic configuration of a roll screen 1 according to a third embodiment of the present invention, and fig. 9 is an exploded perspective view showing a schematic configuration around an operation panel 6 in the roll screen 1 according to the third embodiment of the present invention. Fig. 10 (a), (b), and (c) are views for explaining the operation of the operation panel 6 in the roll screen 1 according to the third embodiment of the present invention. Fig. 11 (a) and (b) are diagrams for explaining operations performed when the operation panel 6 is operated in the roll screen 1 according to the third embodiment of the present invention. Fig. 12 (a) and (b) are diagrams illustrating the operation panel 6 of the roll screen 1 according to the third embodiment of the present invention, in comparison with a comparative example. The same reference numerals are given to constituent members that exhibit the same functions as those of the first embodiment.

The configuration of the roll screen 1 of the third embodiment shown in fig. 8 is substantially the same as that of the first embodiment, except that the shapes of the operation pulley 10, the support member 2a (and the support member 2b), and the operation panel 6 (and the support plate 8) are different. Therefore, in the following description, the support member 2a and the operation panel 6 of the third embodiment will be mainly described.

A specific configuration of the operation panel 6 and its periphery according to the third embodiment will be described with reference to fig. 9. At the right end portion of the windup tube 9, the windup tube 9 is supported rotatably with respect to a fixed shaft 11 extending from the support member 2a, as in the first embodiment. The operating pulley 10 is provided with a through hole to have the fixed shaft 11 as a rotation axis. The winding pipe 9 can rotate in accordance with the rotation of the operating pulley 10.

The operation panel 6 of the third embodiment is elongated, is provided between the operation pulley 10 and the support member 2a at a position close to the outdoor side so as to avoid the fixed shaft 11, and is provided with a pivot shaft hole portion 27 through which the pivot shaft 16 extending from the support member 2a is inserted so that the operation panel 6 performs a pendulum motion with the pivot shaft 16 as a pivot shaft. As in the first embodiment, a hole 22 is provided in a lower portion of the operation plate 6 to attach one end of the support shaft 7 extending between the support members 2a, 2b to the operation plate 6 by a holding member 21 such as a rivet.

The shape of the support plate 8 of the present embodiment is also substantially the same as the operation plate 6 of the present embodiment. The support shaft 7 may be mounted to be rotatable with respect to the operation plate 6 and the support plate 8, or may be mounted to be non-rotatable with respect to the operation plate 6 and the support plate 8. Further, the following may be configured: the operation plate 6 and the support plate 8 are provided with a support shaft 16, and the support members 2a and 2b are provided with pivot shaft holes 27, respectively.

The operation plate 6 and the support plate 8 of the third embodiment are rotatable with respect to the operation pulley 10 and the winding pipe 9 about the support shaft 16 as a rotation axis. The position of the pendulum movement depends on the self-weight of the lower beam 5 or the like at the lower end portion of the curtain cloth 4 suspended and supported on the support shaft 7 and the winding tube 9.

The operating plate 6 and the support plate 8 of the third embodiment configured as described above are capable of rotating relative to the operating pulley 10 and the winding pipe 9, and are capable of performing pendulum motions by their own weight of the curtain fabric 4 and the like with the support shaft 16 as a rotating shaft.

A rope cover 20 (not shown) is disposed above the support member 2a to prevent the operation rope 3 wound around the operation pulley 10 from falling off. The cord cover 20 may be formed of another member fixed to the fixed shaft 11.

The operation panel 6 according to the third embodiment is not provided with the two cord guide portions 12 and 13 as in the first embodiment. Instead, the support shaft 7 is disposed on the front side of the curtain fabric 4, and the operation cord 3 is passed through the back side of the support shaft 7. Therefore, in the present embodiment, the support shaft 7 is configured to have functions corresponding to the rope guide portions 12 and 13 of the first embodiment. Further, a rope guide portion 14 is provided at the lower end portion of the support member 2a, and the operation rope 3 hangs down from the front surface side of the rope guide portion 14. That is, the loop-shaped operation cord 3 hanging down from the operation pulley 10 passes around the outside of the room of the support shaft 7, and then hangs down from above the cord guide portion 14 under the guide of the cord guide portion 14 (see fig. 8). The shape of the support member 2b is substantially the same as that of the support member 2a except that the string guide part 14 is not provided.

Therefore, the operation panel 6 of the third embodiment is also configured to: when the operation cord 3 is operated, the pendulum motion is performed so as to increase the interval between the relatively movable double layer fabrics 4. In particular, the operation plate 6 performs a pendulum motion so that the positional relationship between the take-up tube 9 and the support shaft 7 changes between the positional relationship at the time of rest and the positional relationship at the time of operation. Further, the operation panel 6 is configured to: the interval of the double-layer curtain cloth 4 is larger when in operation than when in rest.

Hereinafter, the operation of the operation panel 6 according to the third embodiment will be described in more detail with reference to fig. 10 to 12. First, referring to (a) in fig. 10, the operation plate 6 is supported such that: the support shaft 16 is rotatable with respect to the operation pulley 10 and the take-up pipe 9 as a rotation axis, and when the lower beam 5 is in a stationary state at the lower limit position, a torque toward the front side (clockwise in fig. 10 a) in a direction in which the front and rear fabrics 4 are brought into close contact is applied to the operation plate 6 by its own weight (the weight of the fabrics 4, the lower beam 5, the operation plate 6, the support plate 8, and the support shaft 7). The operation cord 3 is suspended from the cord guide portion 14 provided in the support member 2 a.

When the lower beam 5 is in a static state at the lower limit position, the interval of the double-layer curtain cloth 4 is fixed when the double-layer curtain cloth 4 is in a position close to or close to each other (the interval of the double-layer curtain cloth 4 is d 1). Therefore, the translucent portion 4b of the double-layer fabric 4 can be shifted from the light-shielding portion 4a to be in the translucent state, or the translucent portion 4b of the fabric 4 can be completely overlapped with the light-shielding portion 4a to be in the light-shielding state, and particularly, the light-shielding property in the light-shielding state can be improved. In addition, from the viewpoint of improving the light-shielding performance of the double-ply fabric 4, it is preferable that the upper end of the fabric 4 is attached to the winding tube 9 and the support shaft 7 so that the position where the fabric 4 hangs down from the winding tube 9 and the support shaft 7 in the lower limit state is overlapped in the front-rear direction.

Referring to fig. 10 (b), when the underbeam 5 is in a stationary state at the intermediate position, the winding diameter R of the fabric 4 wound around the winding pipe 9 increases as the underbeam 5 moves from the lower limit position to the upper limit position, and the position of the fabric 4 hanging down by the weight of the fabric 4 or the like moves toward the outdoor side, but the interval of the double layer fabrics 4 is reduced or the position where the double layer fabrics 4 are in close contact with each other is not changed until the predetermined height is reached (the interval d 1' ≈ d1 of the double layer fabrics 4). Therefore, when the fabric 4 is positioned at a position not more than the intermediate position, the translucent portion 4b of the double-layer fabric 4 can be shifted from the light-blocking portion 4a to be in the translucent state, or the translucent portion 4b of the fabric 4 can be completely overlapped with the light-blocking portion 4a to be in the light-blocking state, and particularly, the light-blocking property in the light-blocking state can be improved.

Referring to fig. 10 (c), when the lower beam 5 is in a stationary state at the upper limit position, the winding diameter R of the fabric 4 wound around the winding pipe 9 is increased to the maximum, and the position of the fabric 4 suspended by the weight of the fabric 4 or the like is further moved to the outdoor side, but in this state, the position where the interval between the double-layer fabrics 4 is reduced is also fixed.

However, in this state, since the curtain 4 itself is in the open state, attention needs to be paid to the close state of the double curtain 4 at rest in order to prevent a problem in practical use.

Next, referring to fig. 11 (a), when the lower beam 5 is raised by operating the operation cord 3 from a state in which the lower beam 5 is at the lower limit position, for example, the curtain 4 is wound around the winding pipe 9. At this time, the operating cord 3 applies a torque to the support shaft 7 with the cord guide 14 as a support shaft, and the operating panel 6 is driven to perform a pendulum motion, whereby the interval d2 during operation of the double curtain 4 is made larger than the interval d1 during rest. Therefore, at the time of the lifting operation, the double-ply fabric 4 relatively moves without generating friction, or only in a partial stage during the lifting operation, or the friction force is weakened, so that there is no possibility of damaging the fabric 4.

Similarly, referring to fig. 11 (b), when the lower beam 5 is lowered by operating the operating cord 3 from a state in which the lower beam 5 is at the intermediate position or the upper limit position, for example, the curtain fabric 4 wound around the winding pipe 9 is lowered. At this time, the operating cord 3 applies a torque to the support shaft 7 with the cord guide 14 as a support shaft, and the operating panel 6 is driven to perform a pendulum motion, whereby the interval d3 during operation of the double curtain 4 is made larger than the interval d1 during rest. Therefore, at the time of the lowering operation, the double-ply fabric 4 relatively moves without generating friction, or friction is generated only at a partial stage in the raising and lowering process, or the friction force is weakened, so that there is no possibility of damaging the fabric 4.

Here, in order to explain the attention in the pendulum movement of the operation plate 6 of the third embodiment, fig. 12 (b) shows a comparative example in which the support shaft 16 of the operation plate 6 is disposed at a position close to the fixed shaft 11, unlike the present embodiment shown in fig. 12 (a). In the present embodiment shown in fig. 12 (a), when the underbeam 5 is in a stationary state at the lower limit position, the interval of the double layer fabrics 4 is constant when the double layer fabrics 4 are in a position (interval d1 of the double layer fabrics 4) close to or in close contact with each other by the weight of the fabrics 4 suspended and supported by the support shaft 7 and the winding pipe 9.

On the other hand, in the comparative example shown in fig. 12 (b), since the support shaft 16 is disposed at a position closer to the fixed shaft 11, the interval D of the double-ply fabric 4 becomes large (D > D1), which is not preferable. Therefore, although the preferable position of the support shaft 16 is related to the diameter of the support shaft 7 or the winding pipe 9 and the distance between the support shaft 7 and the winding pipe 9, it is preferable to determine the position so that the interval between the double plies 4 is narrowed or the double plies 4 are closely attached to each other with reference to the case where the lower beam 5 is in the stationary state at the lower limit position.

Therefore, in the roll screen 1 of the third embodiment, the operating plate 6 is rotated by the tensile force of the operating cord 3 during the up-and-down operation, so that the double-layered fabrics 4 are relatively moved in a state of being separated from each other without friction (or friction is weakened even if friction occurs), and there is no possibility of damaging the fabrics 4. Further, when the double-layer fabric 4 is in the stationary state, the operating cord 3 loses tension, and the operating panel 6 is rotated in the direction of bringing the double-layer fabric 4 closer by the weight of the fabric 4 or the like, so that the interval between the double-layer fabric 4 can be reduced or the double-layer fabrics 4 can be brought into close contact with each other, and the light shielding property can be improved when the light transmitting portion 4b of the fabric 4 and the light shielding portion 4a are completely overlapped to form the light shielding state.

In particular, in the roll screen 1 of the third embodiment, since the support shaft 7 is disposed on the indoor side and is formed in a plate structure that swings (swing) in the lower part of the indoor side, the installation space of the front-rear width of the roll screen 1 based on the pendulum movement of the operation panel 6 can be reduced as compared with the first embodiment.

[ fourth embodiment ]

Next, a structure of the rolling screen 1 according to a fourth embodiment of the present invention, which is a modification of the first embodiment, will be described with reference to fig. 13 to 14. Fig. 13 is an exploded perspective view showing a schematic configuration around the operation panel 6 in the roll screen 1 according to the fourth embodiment of the present invention.

Fig. 14 (a), (b), and (c) are views for explaining the operation of the operation panel 6 in the roll screen 1 according to the fourth embodiment of the present invention. The same reference numerals are given to constituent members that exhibit the same functions as those of the first embodiment.

The configuration of the roll screen 1 shown in fig. 13 and 14 is the same as that of the first embodiment except that a winding gear mechanism (a drive gear 31, a transmission gear 32, a driven gear 33) is provided between the operation plate 6 and the operation pulley 10. Therefore, in the following description, the operation plate 6, the operation pulley 10, and the winding gear mechanism (the drive gear 31, the transmission gear 32, and the driven gear 33) of the fourth embodiment will be mainly described.

A specific configuration of the operation panel 6 and its periphery according to the fourth embodiment will be described with reference to fig. 13. At the right end portion of the windup tube 9, the windup tube 9 is supported rotatably with respect to a fixed shaft 11 extending from the support member 2a, as in the first embodiment. The operating pulley 10 is provided with a through hole to have the fixed shaft 11 as a rotation axis. The winding pipe 9 can rotate in accordance with the rotation of the operating pulley 10.

A drive gear 31 that rotates in accordance with the rotation of the operation pulley 10 is fixed to the right end of the operation pulley 10, and a substantially cylindrical rotation support portion 24 is provided at the right end of the drive gear 31 as in the first embodiment. The operation plate 6 is provided with a rotation receiving portion 23 having a diameter slightly larger than the rotation supporting portion 24 and having a circular hole shape. Thus, the operation panel 6 is supported as: can rotate relative to the fixed shaft 11, the operating pulley 10 and the winding pipe 9.

A driven gear 33 for rotating the support shaft 7 is provided at the right end portion of the support shaft 7 extending between the support members 2a and 2b, and a hole 22 is provided in the operation plate 6 so that the driven gear 33 is rotatably supported with respect to the operation plate 6 by a holding member 21 such as a rivet.

A transmission gear 32 is attached to the operation panel 6 so as to be rotatable with respect to the operation panel 6, and the transmission gear 32 transmits the rotation of the drive gear 31 to the driven gear 33. The transmission gear 32 is configured to transmit the rotation of the drive gear 31 to the driven gear 33.

Therefore, if the winding pipe 9 is provided as a first winding shaft for the fabric 4, the support shaft 7 functions as a second winding shaft for the fabric 4. In addition, the diameter of the first winding shaft is larger than that of the second winding shaft. The driving gear 31 and the driven gear 33 have the same number of teeth, and thus the number of rotations of the second winding shaft is the same as that of the first winding shaft. Therefore, the winding length of the fabric 4 per unit rotation of the first winding shaft is different from the winding length of the fabric 4 per unit rotation of the second winding shaft. When the operation cord 3 is pulled and the operation pulley 10 is rotated in the winding direction, the first winding shaft is rotated to wind the fabric 4, and the second winding shaft also winds the fabric 4, thereby raising the underbeam 5. During the rising, the rising speed of the fabric 4 on the front side wound around the first winding shaft is different from the rising speed of the fabric 4 on the rear side wound around the second winding shaft (the rotation speed of the first winding shaft > the rotation speed of the second winding shaft), and therefore, a state where the light shielding portion 4a overlaps the light transmitting portion 4b and a state where the light shielding portion 4a overlaps the light shielding portion 4a alternate. The same applies to the unwinding. When the curtain 4 is at the lower limit position, the light shielding portion 4a and the light transmitting portion 4b overlap each other, and the light shielding state is achieved.

The operation panel 6 of the fourth embodiment configured as described above performs pendulum motion so as to increase the interval between the two-ply cords 4 that can move relative to each other when the operation cord 3 is operated. In particular, the operation plate 6 performs a pendulum motion so that the positional relationship between the take-up tube 9 and the support shaft 7 changes between the positional relationship at the time of rest and the positional relationship at the time of operation. Further, the operation panel 6 is configured to: the interval of the double-layer curtain cloth 4 is larger when in operation than when in rest.

The operation of the operation panel 6 will be described in more detail below with reference to fig. 14. First, referring to fig. 14 (a), the operation plate 6 is supported to be rotatable with respect to the operation pulley 10 and the winding pipe 9, and when the lower beam 5 is in a stationary state at the lower limit position, the intermediate position, and the upper limit position, respectively, a torque directed in a direction in which the front and rear fabrics 4 are abutted, that is, a front side (clockwise direction in fig. 14 (a)) is applied to the operation plate 6 by its own weight (weight of the fabric 4, the lower beam 5, the operation plate 6, the support plate 8, and the support shaft 7). The operation cord 3 hangs down with the cord guide portions 12 and 13 as a reference.

In this example, when the bottom rail 5 is in a stationary state at the bottom position, the curtain 4 is set in a state of not being wound around the winding pipe 9 and the support shaft 7, so that the interval of the double curtain 4 is fixed when the double curtain 4 is in a position (interval d1 of the double curtain 4) close to or abutting each other. In addition, from the viewpoint of improving the light-shielding performance of the double-ply fabric 4, it is preferable that the upper end of the fabric 4 is attached to the winding tube 9 and the support shaft 7 so that the position where the fabric 4 hangs down from the winding tube 9 and the support shaft 7 in the lower limit state is overlapped in the front-rear direction.

In a state where the down beam 5 is positioned at the intermediate position or the upper limit position and the fabric 4 is wound around the winding pipe 9 and the support shaft 7 with the winding diameters R1 and R2, the interval between the double-layer fabrics 4 is constant when the double-layer fabrics 4 are positioned close to or in close contact with each other. In the fourth embodiment, since the winding gear mechanism (the drive gear 31, the transmission gear 32, and the driven gear 33) is provided, the tightness of the double-ply fabric 4 is improved in the range from the lower limit position to the upper limit position of the lower beam 5 by winding the fabric 4 around the winding pipe 9 and the support shaft 7 with the winding diameters R1 and R2, respectively.

Therefore, the translucent portion 4b of the double-layer fabric 4 can be shifted from the light-shielding portion 4a to be in the translucent state, or the translucent portion 4b of the fabric 4 can be completely overlapped with the light-shielding portion 4a to be in the light-shielding state, and particularly, the light-shielding property in the light-shielding state can be improved.

Next, referring to fig. 14 (b), when the lower beam 5 is raised by operating the operation cord 3 from a state in which the lower beam 5 is at the lower limit position or the intermediate position, for example, the curtain cloth 4 is wound around the winding pipe 9 and the support shaft 7. At this time, the operation cord 3 applies a torque to the cord guide 12 to thereby cause the operation panel 6 to perform a pendulum motion, whereby the interval d2 during operation of the double curtain 4 is made larger than the interval d1 during standstill. Therefore, even if the front and rear fabrics 4 are relatively moved due to the difference in the raising speed during the raising operation, the double-layer fabrics 4 are not rubbed during the relative movement, or are rubbed only at a partial stage during the raising/lowering operation, or the frictional force is weakened, so that there is no possibility that the fabrics 4 are damaged.

Similarly, referring to fig. 14 (c), when the lower beam 5 is lowered by operating the operation cord 3 from a state in which the lower beam 5 is at the intermediate position or the upper limit position, for example, the curtain cloth 4 wound around the winding pipe 9 and the support shaft 7 is lowered. At this time, the operation cord 3 applies a torque to the cord guide 13 to thereby cause the operation panel 6 to perform a pendulum motion, whereby the interval d3 during operation of the double-ply curtain 4 is made larger than the interval d1 during standstill. Therefore, even if the front and rear fabrics 4 move relatively at different lowering speeds during the lowering operation, the double-layer fabrics 4 do not rub against each other, rub against each other only at a partial stage during the raising and lowering operation, or the frictional force is reduced, so that there is no possibility of damaging the fabrics 4.

Therefore, during the lifting operation, the operating plate 6 is rotated by the tensile force of the operating cord 3, so that the double-layer fabrics 4 are relatively moved in a state of being separated from each other without friction (or friction is reduced even if friction occurs), and thus there is no possibility of damaging the fabrics 4. Further, when the double-layer fabric 4 is in the stationary state, the operating cord 3 loses tension, and the operating panel 6 is rotated in the direction of bringing the double-layer fabric 4 closer by the weight of the fabric 4 or the like, so that the interval between the double-layer fabric 4 can be reduced or the double-layer fabrics 4 can be brought into close contact with each other, and the light shielding property can be improved when the light transmitting portion 4b of the fabric 4 and the light shielding portion 4a are completely overlapped to form the light shielding state.

In particular, in the roll screen 1 of the fourth embodiment, since the winding gear mechanism (the drive gear 31, the transmission gear 32, and the driven gear 33) is provided, the close contact of the double-layer fabric 4 is improved in the range from the lower limit position to the upper limit position of the underbeam 5 by winding the fabric 4 around the winding pipe 9 and the support shaft 7 with the winding diameters R1 and R2, respectively.

Further, the state in which the light-blocking portions 4a and the light-transmitting portions 4b of the front and rear fabrics 4 overlap and the state in which the light-blocking portions 4a (or the light-transmitting portions 4b) of the front and rear fabrics 4 overlap can be switched by only the above configuration, but the amount of vertical movement of the under beam 5 at the time of switching can be reduced by adding the following configuration. The winding gear mechanism (the drive gear 31, the transmission gear 32, and the driven gear 33) may be further provided with an idle gear in an amount corresponding to a moving distance from a light shielding state in which the light transmitting portion 4b of the double-layer fabric 4 overlaps the light shielding portion 4a to a semi-light transmitting state in which the light transmitting portion 4b of the double-layer fabric 4 is shifted from the light shielding portion 4a, on either or both of the drive gear 31 and the driven gear 33. For details of the idling device, refer to, for example, japanese patent laid-open No. 2012-77501.

The present invention has been described above by taking the example of the specific embodiment, but the present invention is not limited to the above embodiment example, and various modifications can be made without departing from the technical idea thereof.

For example, although the fourth embodiment in which the winding gear mechanism (the drive gear 31, the transmission gear 32, and the driven gear 33) is provided has been described as a modification of the first embodiment, the embodiments of the second embodiment and the third embodiment may be combined and applied to provide the winding gear mechanism.

Further, the configuration may be such that: when the winding gear mechanism is provided as a modification of the second or third embodiment, the idle gear is provided.

In the above-described examples of the embodiments, the example in which the light transmitting portions 4b for transmitting partial light and the light shielding portions 4a for shielding light are alternately formed in a stripe pattern on the double-ply fabric 4 formed by folding back one fabric has been described, but the operation plate 6 according to the present invention has an effect in that, even if it is not one fabric or it is not in a form in which the light transmitting portions 4b and the light shielding portions 4a are alternately formed, as long as it is a double-ply fabric: during the lifting operation, the operating plate 6 is rotated by the tensile force of the operating cord 3, so that the double-layer curtain cloth 4 is relatively moved in a state of being separated from each other without generating friction, generating friction only at a partial stage in the lifting process, or weakening the friction.

The shapes of the support members 2a and 2b, the operation panel 6, and the support panel 8, and the shapes of the cord guides 12, 13, and 14 may be various shapes as long as the operation and effect of the present invention can be produced.

In the embodiments, the embodiment has been described in which the support plate 8 performs the pendulum motion in accordance with the pendulum motion of the operation plate 6, but the embodiments may be combined and applied in such a manner that only the operation plate 6 performs the pendulum motion, and the interval between the double layer fabrics approaching or abutting each other at rest is increased at the time of operation. For example, the first embodiment and the second embodiment (or the fourth embodiment or a modification thereof) may be combined to form an embodiment in which: by providing the support member 2b with a rotation guide hole for the end of the support shaft 7 without providing the support plate 8 and providing the rotation guide hole with a rotation restricting function as appropriate, the end of the support shaft 7 that rotates in accordance with the pendulum movement of the operation plate 6 is guided by the rotation guide hole, whereby the interval of the double ply fabric that approaches or clings to at rest is increased only by the pendulum movement of the operation plate 6 at the time of operation.

Further, the following may be configured: a wall portion (cover) standing upward from the support shaft 7 is provided so as to prevent light leakage between the take-up pipe 9 and the ceiling-side mounting surface of the mounting bracket 2.

[ fifth embodiment ]

Next, a structure of a roller blind 1 according to a fifth embodiment of the present invention will be described with reference to fig. 15 to 18. In the above embodiments, the example in which one side of the fabric 4 is attached to the winding pipe 9 and the other side is attached to the support shaft 7 has been described, but in the present embodiment, one side of the fabric 4 is attached to the winding pipe 9 and the other side is attached to the fixing portion 2c, and the fixing portion 2c is provided on the outdoor-side end surface of the mount frame 2. Fig. 15 is a front view showing a schematic configuration of a roll screen 1 according to a fifth embodiment of the present invention, and fig. 16 is a side view showing a schematic configuration of the roll screen 1 according to the fifth embodiment of the present invention. Fig. 17 is an exploded perspective view showing a schematic configuration around the operation unit 60 in the roll screen 1 according to the fifth embodiment of the present invention. Fig. 18 (a), (b), and (c) are diagrams illustrating the operation of the operation unit 60 in the roll screen 1 according to the fifth embodiment of the present invention. The same reference numerals are given to the same components as those in the above embodiments.

In the roller blind 1 shown in fig. 15 and 16, support members 2a and 2b are fixed to both ends of a mounting frame 2, and a cylindrical winding tube 9 is rotatably supported between the support members 2a and 2b by a fixed shaft 11 extending from the support members 2a and 2 b.

The right end of the windup tube 9 is provided with an operation unit 60 that can rotate relative to the windup tube 9 and the support members 2a and 2 b. Further, the operation unit 60 houses an operation pulley 10, and the endless operation rope 3 is hung by being wound around the operation pulley 10. Further, the roller shutter 1 is configured to: the winding pipe 9 can be rotated by operating the operation cord 3, and the surface of the operation pulley 10 around which the operation cord 3 is wound has a high-friction surface shape. The operation cord 3 may be formed of a ball chain, and the surface of the operation pulley 10 around which the ball chain is wound may be formed to have an uneven shape corresponding to the ball portion of the ball chain. The specific configuration and operation of the operation unit 60 will be described in detail later.

One side of the curtain cloth 4 is attached to the winding pipe 9, and the curtain cloth 4 is suspended and supported on the winding pipe 9 in a windable manner, and the other side of the curtain cloth 4, which hangs down from the winding pipe 9 and is folded back via the underbeam 5 functioning as a weight member, is attached to a fixing portion 2c, and the fixing portion 2c is provided on the outdoor-side end surface of the mounting frame 2 positioned above the winding pipe 9. For example, the fixing portion 2c may be configured to: a fabric retainer fixed to the end of the fabric 4 by welding or the like is detachably locked to the fixing portion 2 c. Further, a roller 15 is inserted into the lower end portion of the fabric 4 hanging down from between the winding pipe 9 and the fixing portion 2c, and the roller 15 is rotatably supported at both end portions of the lower beam 5. Thereby, the curtain fabric 4 is provided to be applied with tension by the weight of the underbeam 5.

Therefore, when the operation cord 3 is operated to rotate the take-up tube 9 in the cord winding direction, the lower beam 5 is raised, and when the take-up tube 9 is rotated in the cord unwinding direction, the lower beam 5 is lowered.

Further, a barrel for reducing an operation force when the fabric 4 is wound up is housed in a left end side position inside the winding tube 9, and a stopper device or the like (not shown) for preventing the fabric 4 from lowering due to its own weight is housed in a right end side position.

Since the fabric 4 is suspended and supported in a state of being overlapped in two layers by alternately forming the light transmitting portions 4b for transmitting partial light and the light shielding portions 4a for shielding light in a stripe shape on the fabric 4, the fabric 4 in front and rear is relatively moved in the vertical direction by the operation of the operation cord 3, the overlapping degree of the light transmitting portions 4b and the light shielding portions 4a can be adjusted, and the lighting amount can be adjusted.

Next, a specific configuration of the operation unit 60 and its surroundings will be described with reference to fig. 15, 16, and 17. The operation unit 60 is constituted by two operation plate members 6a and 6b, and the two operation plate members 6a and 6b are integrally formed so as to be able to hold the operation pulley 10 and the rope cover 20 inside. The operation plate member 6b is provided with rope guide portions 12 and 13 in a projecting shape linearly extending toward the operation plate member 6 a. The endless operation rope 3 wound around the operation pulley 10 hangs downward under the guide of the rope guide portions 12 and 13. The rope cover 20 is fixed to the support member 2 a. The rope cover 20 may have any form as long as it is provided to prevent the operation rope 3 wound around the pulley 10 from slipping off the pulley 10, and may be, for example, a form of being accommodated inside the operation unit 60 as shown in the drawing, or a form of being fixed to the fixed shaft 11 or the support member 2 a.

The rope guide portion 12 in this example is provided with two pieces of the rope guide portion 13 above the rope guide portion 13, one side (front side) of the looped operation rope 3 hanging down from the operation pulley 10 is guided to pass through and hang down between the rope guide portion 12 (front side) and the rope guide portion 13, and the other side (rear side) of the looped operation rope 3 hanging down from the operation pulley 10 is guided to pass through and hang down between the rope guide portion 12 (rear side) and the rope guide portion 13 (see fig. 16).

The operation pulley 10 is provided with a through hole so that a fixed shaft 11 extending from the support member 2a serves as a rotation shaft, and the winding pipe 9 is supported by the fixed shaft 11 so as to be rotatable together with the rotation of the operation pulley 10. For this purpose, a fitting portion 25 that fits the right end inner peripheral surface of the winding pipe 9 is provided on the left end side of the operation pulley 10. The left end of the operating pulley 10 is engaged with a gear mechanism (not shown) connected to a brake device housed in the winding pipe 9. When the speed increase or the speed reduction is not required, the gear mechanism may be omitted and the winding pipe 9 may be directly connected to the operation pulley 10.

The operation plate member 6a is provided with a circular hole-shaped rotation receiving portion 23a having a diameter larger than the outer diameter of the frame of the operation pulley 10, and the operation plate member 6b is provided with a semicircular hole-shaped rotation receiving portion 23b having a diameter larger than the outer diameter of the winding pipe 9. Therefore, the operation unit 60 is supported to be rotatable with respect to the operation pulley 10 and the winding pipe 9. A recess 20a is provided above the string cover 20 fixed to the support member 2a, and a substantially inverted trapezoidal projecting piece 61 is provided above the operation plate member 6 a. In a state where the two operation plate members 6a and 6b are integrally formed so as to be able to hold the operation pulley 10 and the rope cover 20 inside, the protruding piece 61 is engaged with the concave portion 20a so as to be able to rotate within a predetermined range.

Further, a step portion 20b for restricting the relative rotation of the operation unit 60 within a predetermined angle is provided on the inner wall of the upper projecting piece of the cord cover 20 capable of accommodating the operation plate member 6b inside. That is, when the operation unit 60 is relatively rotated, the stepped portion 20b can be brought into contact with the edge portions 26 on both sides of the upper end of the rope guide portion 12 of the operation panel member 6 b. Therefore, the relative rotation of the operation unit 60 is restricted within a certain angle by the abutment of the edge portion 26 with the stepped portion 20 b.

On the other hand, a movable fin 40 having a substantially fin shape is suspended from an outdoor end of the bottom surface of the mount 2 fixed at both ends to the support members 2a and 2b, and the movable fin 40 is rotatable about its base axis. Since the curtain cloth 4 hangs down from the fixed portion 2c provided on the outdoor side end surface of the mount 2, when the side end portion of the projecting piece 61 of the operation plate member 6a presses the movable vane 40 by the relative rotation of the operation unit 60, the movable vane 40 rotates, and the curtain cloth 4 on the outdoor side further moves toward the outdoor side.

The operation unit 60 thus configured is configured to: when the operation cord 3 is operated, the pendulum motion is performed so as to increase the interval between the relatively movable double layer fabrics 4. Further, the operation unit 60 is configured to: the interval of the double-layer curtain cloth 4 is larger when in operation than when in rest.

Hereinafter, the operation of the operation unit 60 will be described in more detail with reference to fig. 18. First, referring to fig. 18 (a), the operation unit 60 is supported to be rotatable with respect to the operation pulley 10 (and the winding pipe 9), and when the lower beam 5 is in a stationary state at the lower limit position, the intermediate position, and the upper limit position, respectively, a torque in a direction in which the front and rear fabrics 4 are brought into close contact is applied to the operation unit 60 by its own weight (the weight of the fabric 4, the lower beam 5, and the like). Thereby, the operation cord 3 hangs down with the cord guide portions 12 and 13 as a reference.

In a stationary state in which the bottom member 5 is at the lower limit position, or in a stationary state in which the bottom member 5 is at the intermediate position or the upper limit position and the fabric 4 is wound around the winding pipe 9 with a predetermined winding diameter, the interval of the double fabric 4 is constant when the double fabric 4 is at a position (interval d1 of the double fabric 4) at which they approach or abut each other. Therefore, the translucent portion 4b of the double-layer fabric 4 can be shifted from the light-shielding portion 4a to be in the translucent state, or the translucent portion 4b of the fabric 4 can be completely overlapped with the light-shielding portion 4a to be in the light-shielding state, and particularly, the light-shielding property in the light-shielding state can be improved.

Next, referring to fig. 18 (b), when the lower beam 5 is raised by operating the operation cord 3 from a state in which the lower beam 5 is at the lower limit position or the intermediate position, for example, the curtain 4 is wound around the winding pipe 9. At this time, the operation cord 3 abuts on the cord guide 12 on the indoor side and applies a clockwise torque to the operation unit 60, thereby causing the operation unit 60 to perform a pendulum motion, and the side end portion of the protruding piece 61 of the operation plate member 6a rotates the movable flap 40, thereby pressing the curtain fabric 4 on the outdoor side. Therefore, the interval d2 when the double ply cord 4 is operated is larger than the interval d1 when it is at rest. Therefore, at the time of the lifting operation, the double-ply fabric 4 relatively moves without generating friction, or only generates friction at a partial stage in the lifting process, or the friction force is weakened, so that there is no possibility of damaging the fabric 4.

Similarly, referring to fig. 18 (c), when the lower beam 5 is lowered by operating the operation cord 3 from a state in which the lower beam 5 is at the intermediate position or the upper limit position, for example, the curtain fabric 4 wound around the winding pipe 9 is lowered. At this time, the operation cord 3 abuts on the cord guide portion 13 on the indoor side and applies a clockwise torque to the operation unit 60, thereby causing the operation unit 60 to perform a pendulum motion, and the side end portion of the protruding piece 61 of the operation plate member 6a rotates the movable flap 40, thereby pressing the curtain fabric 4 on the outdoor side. Therefore, the interval d3 when the double ply cord 4 is operated is larger than the interval d1 when it is at rest. Therefore, at the time of the lowering operation, the double-ply fabric 4 relatively moves without generating friction, or friction is generated only at a partial stage in the raising and lowering process, or the friction force is weakened, so that there is no possibility of damaging the fabric 4. Even if friction occurs when the fabric winding thickness of the cord 4 approaches the upper limit, the frictional force tends to decrease.

Therefore, in the roll screen 1 of the fifth embodiment, at the time of the up-down operation, the operating unit 60 is rotated by the tensile force of the operating cord 3, so that the double-layered fabrics 4 are relatively moved in a state of being separated from each other without friction (or friction is weakened even if friction is generated), and thus there is no possibility (or a possibility of damage to the fabrics 4 is reduced). Further, since the operating cord 3 loses tension when in the stationary state and the operating unit 60 is rotated in the direction in which the double-ply fabric 4 approaches due to the weight of the fabric 4 or the like, the interval between the double-ply fabrics 4 can be reduced or the double-ply fabrics 4 can be brought into close contact with each other, and the light shielding property can be improved when the light transmitting portion 4b of the fabric 4 and the light shielding portion 4a are completely overlapped to form a light shielding state.

Here, the forms of the operation plate members 6a and 6b, the string cover 20, and the like constituting the operation unit 60 may be other forms as long as they have the functions to exhibit the above-described functions, for example, as shown in fig. 19. Fig. 19 (a), (b), and (c) are diagrams illustrating the operation of the operation unit 60 in the modified example of the roll screen 1 according to the fifth embodiment of the present invention. In the example shown in fig. 19, one of the rope guide portions 12 and 13 is provided in the operation unit 60. The protruding piece 61 of the operation plate member 6a is provided with a rotation restricting shaft 63, and the relative rotation of the operation unit 60 is restricted within a predetermined angle by a rotation restricting groove 62 provided in the protruding piece extending upward of the rope cover 20. Further, the rotation restricting groove 62 may be provided in the projecting piece 61 of the operation plate member 6a, and the rotation restricting shaft 63 may be provided in the projecting piece extending upward of the rope cover 20, so that the mechanism for restricting the relative rotation of the operation unit 60 is not required when the relative rotation of the operation unit 60 is not required to be restricted within a predetermined angle.

The operation of the modification shown in fig. 19 will be described. First, referring to fig. 19 (a), the operation unit 60 is supported to be rotatable with respect to the operation pulley 10 (and the winding pipe 9), and when the lower beam 5 is in a stationary state at the lower limit position, the intermediate position, and the upper limit position, respectively, a torque in a direction in which the front and rear fabrics 4 are brought into close contact is applied to the operation unit 60 by its own weight (the weight of the fabric 4, the lower beam 5, and the like). Thereby, the operation cord 3 hangs down with the cord guide portions 12 and 13 as a reference.

In a stationary state in which the bottom member 5 is at the lower limit position, or in a stationary state in which the bottom member 5 is at the intermediate position or the upper limit position and the fabric 4 is wound around the winding pipe 9 with a predetermined winding diameter, the interval of the double fabric 4 is constant when the double fabric 4 is at a position (interval d1 of the double fabric 4) at which they approach or abut each other.

Next, referring to fig. 19 (b), when the lower beam 5 is raised by operating the operation cord 3 from a state in which the lower beam 5 is at the lower limit position or the intermediate position, for example, the curtain 4 is wound around the winding pipe 9. At this time, the operation cord 3 abuts on the cord guide 12 on the indoor side and applies a clockwise torque to the operation unit 60, thereby causing the operation unit 60 to perform a pendulum motion, and the side end portion of the protruding piece 61 of the operation plate member 6a rotates the movable flap 40, thereby pressing the curtain fabric 4 on the outdoor side. Therefore, the interval d2 when the double ply cord 4 is operated is larger than the interval d1 when it is at rest.

Similarly, referring to fig. 19 (c), when the lower beam 5 is lowered by operating the operation cord 3 from a state in which the lower beam 5 is at the intermediate position or the upper limit position, for example, the curtain fabric 4 wound around the winding pipe 9 is lowered. At this time, the operation cord 3 abuts on the cord guide portion 13 on the indoor side and applies a clockwise torque to the operation unit 60, thereby causing the operation unit 60 to perform a pendulum motion, and the side end portion of the protruding piece 61 of the operation plate member 6a rotates the movable flap 40, thereby pressing the curtain fabric 4 on the outdoor side. Therefore, the interval d3 when the double ply cord 4 is operated is larger than the interval d1 when it is at rest.

Therefore, in the example shown in fig. 19, the operating unit 60 is rotated by the tensile force of the operating cord 3 during the raising and lowering operation, so that the double-layer fabrics 4 are relatively moved in a state of being separated from each other without friction (or friction is reduced even if friction is generated), and thus there is no possibility (or a possibility of reduction) of damaging the fabrics 4. Further, since the operating cord 3 loses tension when in the stationary state and the operating unit 60 is rotated in the direction in which the double-ply fabric 4 approaches due to the weight of the fabric 4 or the like, the interval between the double-ply fabrics 4 can be reduced or the double-ply fabrics 4 can be brought into close contact with each other, and the light shielding property can be improved when the light transmitting portion 4b of the fabric 4 and the light shielding portion 4a are completely overlapped to form a light shielding state.

[ sixth embodiment ]

Next, the structure of the roller shutter 1 according to the sixth embodiment of the present invention will be described with reference to fig. 20 and 21. In the sixth embodiment, one side of the fabric 4 is attached to the winding tube 9 and the other side is attached to the fixing portion 2c, and the fixing portion 2c is provided on the outdoor-side end surface of the mount frame 2, as in the fifth embodiment. Fig. 20 is a front view showing a schematic configuration of a roll screen 1 according to a sixth embodiment of the present invention, and fig. 21 is an exploded perspective view showing a schematic configuration around an operation unit 60 in the roll screen 1 according to the sixth embodiment of the present invention. The same reference numerals are given to the same components as those in the above embodiments.

The sixth embodiment is different from the fifth embodiment in that: a support plate 8 is provided at the left end portion of the winding tube 9, and a movable fin is not provided on the mount 2, and a fixing rod 50 is fixed between the operation unit 60 and the support plate 8.

As shown in fig. 20, support members 2a and 2b are fixed to both ends of the mount frame 2, and a cylindrical winding tube 9 is rotatably supported between the support members 2a and 2b by a fixed shaft 11 extending from the support members 2a and 2 b.

As in the fifth embodiment, an operation unit 60 that is rotatable with respect to the windup tube 9 and the support members 2a and 2b is provided at the right end of the windup tube 9. Further, the operation unit 60 houses an operation pulley 10, and the endless operation rope 3 is hung by being wound around the operation pulley 10. Further, the roller shutter 1 is configured to: the winding pipe 9 can be rotated by the operation of the operation cord 3.

As in the fifth embodiment, one side of the fabric 4 is attached to the winding pipe 9, and the fabric 4 is suspended and supported in a windable manner on the winding pipe 9, and the other side of the fabric 4, which hangs down from the winding pipe 9 and is folded back via the underbeam 5 functioning as a weight member, is attached to a fixing portion provided on the outdoor-side end surface of the mounting frame 2. A roller 15 is inserted into the lower end of the fabric 4 hanging down from between the winding pipe 9 and the fixing portion, and the roller 15 is rotatably supported at both ends of the lower beam 5. Thereby, the curtain fabric 4 is provided to be applied with tension by the weight of the underbeam 5.

Therefore, when the operation cord 3 is operated to rotate the take-up tube 9 in the cord winding direction, the lower beam 5 is raised, and when the take-up tube 9 is rotated in the cord unwinding direction, the lower beam 5 is lowered.

Further, a barrel for reducing an operation force when the fabric 4 is wound up is housed in a left end side position inside the winding tube 9, and a stopper device or the like (not shown) for preventing the fabric 4 from lowering due to its own weight is housed in a right end side position.

Since the fabric 4 is suspended and supported in a state of being overlapped in two layers by alternately forming the light transmitting portions 4b for transmitting partial light and the light shielding portions 4a for shielding light in a stripe shape on the fabric 4, the fabric 4 in front and rear is relatively moved in the vertical direction by the operation of the operation cord 3, the overlapping degree of the light transmitting portions 4b and the light shielding portions 4a can be adjusted, and the lighting amount can be adjusted.

Next, a specific configuration of the operation unit 60 and its surroundings will be described with reference to fig. 21. The operation unit 60 of the sixth embodiment is the same as the fifth embodiment except for the shape of the protruding piece 61 of the operation plate member 6 a.

The protruding piece 61 of the operation plate member 6a is formed into a shape extending substantially in the shape of "フ" toward the outdoor side, and one end of the fixing lever 50 is attached to the tip end of the protruding piece 61 of the operation plate member 6 a. The support plate 8 provided between the winding pipe 9 and the support member 2b is configured to: a projecting piece having substantially the same shape as the operation plate member 6a is provided, and the other end of the fixing lever 50 is attached to the projecting piece of the support plate 8 (see fig. 20).

Since the curtain fabric 4 hangs down from the fixing portion provided on the outdoor side end surface of the mount 2, the fixing rod 50 extending substantially in parallel to the winding pipe 9 and located behind the projecting piece 61 of the operation plate member 6a is displaced by the relative rotation of the operation unit 60, and the curtain fabric 4 on the outdoor side is pushed by the fixing rod 50 and further moves toward the outdoor side.

Therefore, in the sixth embodiment, the same operation and effects as those of the fifth embodiment can be produced, and the operation unit 60 is configured to: when the operation cord 3 is operated, the pendulum motion is performed so as to increase the interval between the relatively movable double layer fabrics 4. Further, the operation unit 60 is configured to: the interval of the double-layer curtain cloth 4 is larger when in operation than when in rest.

Particularly in the examples of the fifth and sixth embodiments, the support shaft 7 does not need to be provided below the winding tube 9 as compared with the examples of the first to fourth embodiments, and thus the width of the roll screen 1 in the front-rear direction can be prevented from becoming large. In addition, in the examples of the first to fourth embodiments, the following configurations are provided: the support shaft 7 is provided on the operation plate 6 that performs the pendulum movement, and relatively rotates the operation plate 6, and therefore, the rotation angle of the operation plate 6 tends to increase as the pendulum movement progresses, but in the examples of the fifth and sixth embodiments, the structure is such that: the operation unit 60 is made to perform pendulum motion so that the interval at the time of operation of the double curtain 4 is larger than the interval at the time of rest, and the rotation angle of the operation unit 60 does not increase.

More specifically, in the examples of the fifth and sixth embodiments, by providing the fabric gap adjustment member such as the movable flap 40 and the fixed lever 50, the pendulum movement of the auxiliary operation unit 60 makes the interval of the double fabric 4 at the time of operation larger than the interval at the time of rest, and the width in the front-rear direction of the roll screen 1 including the pendulum movement operation unit 60 can be further reduced.

[ seventh embodiment ]

Next, the structure of the roller shutter 1 according to the seventh embodiment of the present invention will be described with reference to fig. 22 to 24. The components of the rolling shutter 1 according to the seventh embodiment are substantially the same as those of the rolling shutter 1 according to the fifth embodiment, but the mounting bracket 2, the support member 2a, the cord cover 20, the movable flap 40, the operation unit 60, the operation cord 3 made of a ball chain, and the operation pulley 10 are different from those of the fifth embodiment in their shapes.

Fig. 22 is a front view showing a schematic configuration of a roll screen according to a seventh embodiment of the present invention. Fig. 23 is an exploded perspective view showing a schematic configuration around the operation unit 60 in the roll screen 1 according to the seventh embodiment of the present invention. Fig. 24 (a), (b), and (c) are diagrams illustrating the operation of the operation unit 60 in the roll screen 1 according to the seventh embodiment of the present invention. The same components as those in the fifth embodiment are denoted by the same reference numerals.

As shown in fig. 22, in the roll screen 1 of the seventh embodiment, the support members 2a and 2b are fixed to both ends of the mounting frame 2, and the cylindrical winding tube 9 is rotatably supported between the support members 2a and 2b by the fixed shaft 11 extending from the support members 2a and 2b, as in the fifth embodiment.

An operation unit 60 that can rotate with respect to the windup tube 9 and the support members 2a and 2b is provided at the right end portion of the windup tube 9. Further, the operation unit 60 houses an operation pulley 10, and the endless operation rope 3 is hung by being wound around the operation pulley 10. Further, the roller shutter 1 is configured to: the winding pipe 9 can be rotated by the operation of the operation cord 3. The operation rope 3 is constituted by an endless ball chain including a ball portion 3a and a chain portion 3b connected at a predetermined pitch, and the surface of the operation pulley 10 is formed to have an uneven surface having a shape corresponding to the ball portion 3 a.

One side of the curtain cloth 4 is attached to the winding pipe 9, and the curtain cloth 4 is suspended and supported on the winding pipe 9 in a windable manner, and the other side of the curtain cloth 4, which hangs down from the winding pipe 9 and is folded back via the underbeam 5 functioning as a weight member, is attached to a fixing portion 2c, and the fixing portion 2c is provided on the outdoor-side end surface of the mounting frame 2 positioned above the winding pipe 9. As shown in fig. 24, the fixing portion 2c according to the present embodiment is configured such that: the fabric pressing plate 80 is detachably locked to the fixing portion 2c, and the fabric pressing plate 80 can be wound around the end of the fabric 4 to adjust the length of the fabric 4. Further, a roller 15 is inserted into the lower end portion of the fabric 4 hanging down from between the winding pipe 9 and the fixing portion 2c, and the roller 15 is rotatably supported at both end portions of the lower beam 5. Thereby, the curtain fabric 4 is provided to be applied with tension by the weight of the underbeam 5.

Therefore, when the operation cord 3 is operated to rotate the take-up tube 9 in the cord winding direction, the lower beam 5 is raised, and when the take-up tube 9 is rotated in the cord unwinding direction, the lower beam 5 is lowered.

Further, a barrel for reducing an operation force when the fabric 4 is wound up is housed in a left end side position inside the winding tube 9, and a stopper device or the like (not shown) for preventing the fabric 4 from lowering due to its own weight is housed in a right end side position.

Since the fabric 4 is suspended and supported in a state of being overlapped in two layers by alternately forming the light transmitting portions 4b for transmitting partial light and the light shielding portions 4a for shielding light in a stripe shape on the fabric 4, the fabric 4 in front and rear is relatively moved in the vertical direction by the operation of the operation cord 3, the overlapping degree of the light transmitting portions 4b and the light shielding portions 4a can be adjusted, and the lighting amount can be adjusted.

Next, a specific configuration of the operation unit 60 and its surroundings will be described with reference to fig. 22 and 23. The operation unit 60 is constituted by two operation plate members 6a and 6b, and the two operation plate members 6a and 6b are integrally formed so as to be able to hold the operation pulley 10 and the rope cover 20 inside. The operation unit 60 is provided with the string guide portions 12 and 13.

The rope guide 12 of the present embodiment is explained in detail as follows: the operation plate member 6b having a substantially V-shaped overall shape is provided at each of the front and rear direction end portions thereof with a side piece projecting from each of the front and rear direction end portions of the operation plate member 6b in the axial direction of the fixed shaft 11 toward the side opposite to the operation plate member 6a, and an engaging piece 12a is formed at a part of the side piece. The side pieces 12c are also provided on the front and rear direction end portions of the operation plate member 6a, respectively, and the side pieces 12c project from the front and rear direction end portions of the operation plate member 6a toward the side opposite to the operation plate member 6b in the axial direction of the fixed shaft 11, respectively, and the side pieces 12c can be engaged with the engaging pieces 12a of the operation plate member 6 b. The side piece 12c of the operation plate member 6a is provided with a fitting projection 12d, and the engaging piece 12a of the operation plate member 6b is provided with a fitting receiving portion 12b capable of fitting with the fitting projection 12 d. Therefore, when the operation plate members 6a and 6b are integrally formed so as to be able to hold the operation pulley 10 and the rope cover 20 inside, the side piece 12c of the operation plate member 6a is engaged with the engaging piece 12a of the operation plate member 6b, and the fitting convex portion 12d is fitted into the fitting receiving portion 12b, so that the side piece protruding from the operation plate member 6b and the side piece 12c protruding from the operation plate member 6a are integrated, thereby constituting the rope guide portion 12 of the present embodiment.

The rope guide 13 of the present embodiment is described in detail as follows: in order to constitute the cord guide portion 13, a longitudinal protrusion protruding toward the side opposite to the operation plate member 6a in the axial direction of the fixed shaft 11 is formed upright on the lower side of the central portion of the operation plate member 6b in the front-rear direction. The surface 13a of the elongated protrusion (the surface facing the operation plate member 6 a) can abut against and engage with an engagement groove 13b provided on the lower surface of the central portion in the front-rear direction of the operation plate member 6 a. Therefore, when the operation plate members 6a and 6b are integrally formed so as to be able to hold the operation pulley 10 and the rope cover 20 inside, the surface 13a of the elongated protrusion on the operation plate member 6b engages with the engagement groove 13b on the operation plate member 6a, thereby configuring the rope guide portion 13 of the present embodiment. Further, a screw hole 13c is formed in the engagement groove 13b of the operation plate member 6a, and a screw hole (not shown) similar to the screw hole 13c is also formed in the surface 13a of the elongated protrusion of the operation plate member 6 b. The operation unit 60 may be configured by integrally fixing the operation plate members 6a and 6b with the mounting screws 70 via the screw holes. In addition, the following may be formed: the lower ends of the operation plate members 6a and 6b are fitted to each other instead of fixing the lower ends of the operation plate members 6a and 6b with the mounting screws 70. Alternatively, the integration of the operation plate members 6a and 6b may be stabilized by optimizing the shapes of the fitting convex portions 12d and the fitting receiving portions 12b or increasing the number thereof.

The endless operation rope 3 wound around the operation pulley 10 hangs downward under the guide of the rope guide portions 12 and 13. In particular, the two rope guide portions 12 in the seventh embodiment are provided on the front and rear sides of the rope guide portion 13 so as to substantially sandwich the rope guide portion 13, guide paths slightly larger than the outer shape of the ball portion 3a of the operation rope 3 are formed between the front side rope guide portion 12 and the rope guide portion 13 and between the rear side rope guide portion 12 and the rope guide portion 13, one side (front side) of the looped operation rope 3 hanging down from the operation pulley 10 is guided to pass through and hang down between the rope guide portion 12 (front side) and the rope guide portion 13, and the other side (rear side) of the looped operation rope 3 hanging down from the operation pulley 10 is guided to pass through and hang down between the rope guide portion 12 (rear side) and the rope guide portion 13 (see fig. 24).

Further, the guide paths between the front-side rope guide portion 12 and the rope guide portion 13 and between the rear-side rope guide portion 12 and the rope guide portion 13, which are slightly larger than the outer shape of the ball portion 3a of the operation rope 3, are formed as follows: at least two ball portions 3a connected at a predetermined pitch always abut on either one of the rope guide portions 12 and 13. With this configuration, it is possible to reduce operation noise generated by interference between the ball part 3a and the rope guide parts 12 and 13 while suppressing rattling of the operation unit 60 during operation of the operation rope 3.

As shown in fig. 23, the rope cover 20 mainly includes a flange-like body having a cylindrical portion with an insertion hole 20d as a base shaft, and an upper projecting piece projecting from an upper edge of the body in the axial direction of the fixed shaft 11, and is configured to prevent the operation rope 3 wound around the operation pulley 10 from falling off, and the rope cover 20 is fixed so as not to be rotatable with respect to the support member 2 a. In this example, the fixed shaft 11 is formed in a quadrangular bar shape, and the rope cover 20 can be fixed so as not to be rotatable with respect to the support member 2a by inserting and engaging the fixed shaft 11 into the insertion hole 20 d. However, the rope cover 20 may have any form as long as it is provided to prevent the operation rope 3 wound around the operation pulley 10 from slipping off the operation pulley 10.

The operation pulley 10 is provided with a through hole so as to have a fixed shaft 11 extending from the support member 2a as a rotation axis. A projecting portion (not shown) projecting in a cylindrical shape is formed on the right end side of the operation pulley 10, and the projecting portion is engaged with an engagement groove 20c provided around the insertion hole 20d of the rope cover 20, whereby the operation pulley 10 is supported so as not to be rotatable with respect to the rope cover 20 and the support member 2 a. A fitting portion 25 that fits into the inner peripheral surface of the right end of the winding pipe 9 is provided on the left end side of the operating pulley 10 via a flange having a diameter larger than the outer peripheral portion of the operation cord 3. Therefore, the take-up tube 9 is supported to be rotatable in accordance with the rotation of the operating pulley 10. The left end of the operating pulley 10 is engaged with a gear mechanism (not shown) connected to a brake device housed in the winding pipe 9. When the speed increase or the speed reduction is not required, the gear mechanism may be omitted and the winding pipe 9 may be directly connected to the operation pulley 10.

On the other hand, a protruding portion (not shown) protruding in a cylindrical shape is formed on the right end side of the string cover 20, and a rotation receiving portion 23a having a circular hole shape with a diameter larger than the outer diameter of the protruding portion is provided on the operation plate member 6a so as to engage with the protruding portion. The operation plate member 6b is provided with a rotation receiving portion 23b having a semicircular hole shape and a diameter larger than the outer diameter of the winding pipe 9. A recess 20a is provided in an upper projecting piece on the right end side of the string cover 20 fixed to the support member 2a, and a projecting piece 61 having a substantially inverted trapezoidal shape is provided above the operation plate member 6 a. The projecting piece 61 of this example has a thickness substantially equal to the width of the operation unit 60 in the left-right direction, and the bottom surface of the projecting piece 61 is supported along the top surface of the rope cover 20, whereby the relative rotation of the operation unit 60 with respect to the operation pulley 10 and the winding pipe 9 is stabilized. Therefore, the operation unit 60 is supported to be rotatable with respect to the operation pulley 10 and the winding pipe 9.

In a state where the two operation plate members 6a and 6b are integrally formed so as to be able to hold the operation pulley 10 and the rope cover 20 inside, the protruding piece 61 is engaged with the concave portion 20a so as to rotate within a predetermined range. Further, a step portion 20b for restricting the relative rotation of the operation unit 60 within a predetermined angle is provided on the inner wall of the upper projecting piece on the left end side of the cord cover 20 capable of accommodating the operation plate member 6b inside. That is, when the operation unit 60 is relatively rotated, the stepped portion 20b can be brought into contact with the edge portions 26 on both sides of the upper end of the rope guide portion 12 of the operation panel member 6 b. Therefore, the relative rotation of the operation unit 60 is restricted within a certain angle by the abutment of the edge portion 26 with the stepped portion 20 b.

On the other hand, a movable fin 40 having a substantially fin shape is suspended from an outdoor-side end portion of the bottom surface of the mount frame 2 fixed at both ends to the support members 2a and 2b, and the movable fin 40 is rotatable about its base axis.

The movable vane 40 of the seventh embodiment is configured such that: the length is longer than that in the fifth embodiment to block the gap between the mounting frame 2 and the winding pipe 9, and a part of the inside thereof is cut off, thereby reducing the weight while maintaining the strength. The movable fin 40 having the above-described length can further shield external light entering from the gap between the mount 2 and the winding pipe 9, and the load due to the displacement of the movable fin 40 during the pendulum movement can be reduced because of the reduction in weight. Since the curtain cloth 4 hangs down from the fixed portion 2c provided on the outdoor side end surface of the mount 2, when the side end portion of the projecting piece 61 of the operation plate member 6a presses the movable vane 40 by the relative rotation of the operation unit 60, the movable vane 40 rotates, and the curtain cloth 4 on the outdoor side further moves toward the outdoor side.

The operation unit 60 thus configured is configured to: when the operation cord 3 is operated, the pendulum motion is performed so as to increase the interval between the relatively movable double layer fabrics 4. Further, the operation unit 60 is configured to: the interval of the double-layer curtain cloth 4 is larger when in operation than when in rest.

Hereinafter, the operation of the operation unit 60 will be described in more detail with reference to fig. 24. First, referring to fig. 24 (a), the operation unit 60 is supported to be rotatable with respect to the operation pulley 10 (and the winding pipe 9), and when the lower beam 5 is in a stationary state at the lower limit position, the intermediate position, and the upper limit position, respectively, a torque in a direction in which the front and rear fabrics 4 are brought into close contact is applied to the operation unit 60 by its own weight (the weight of the fabric 4, the lower beam 5, and the like). Thereby, the operation cord 3 hangs down with the cord guide portions 12 and 13 as a reference.

In a stationary state in which the bottom member 5 is at the lower limit position, or in a stationary state in which the bottom member 5 is at the intermediate position or the upper limit position and the fabric 4 is wound around the winding pipe 9 with a predetermined winding diameter, the interval of the double fabric 4 is constant when the double fabric 4 is at a position (interval d1 of the double fabric 4) at which they approach or abut each other. Therefore, the translucent portion 4b of the double-layer fabric 4 can be shifted from the light-shielding portion 4a to be in the translucent state, or the translucent portion 4b of the fabric 4 can be completely overlapped with the light-shielding portion 4a to be in the light-shielding state, and particularly, the light-shielding property in the light-shielding state can be improved. In particular, the fixing portion 2c of the mount 2 of the present embodiment is configured to: since the fabric retainer 80 is detachably engaged with the fixing portion 2c, the fabric retainer 80 can be wound around the end of the fabric 4 to adjust the length of the fabric 4, and thus, the length of the fabric 4 can be easily adjusted to be in a shielding state when, for example, the underbeam 5 is positioned at the lower limit position. Further, the long movable fin 40 can further shield external light incident from the gap between the mount 2 and the winding pipe 9.

Next, referring to fig. 24 (b), when the lower beam 5 is raised by operating the operation cord 3 from a state in which the lower beam 5 is at the lower limit position or the intermediate position, for example, the curtain 4 is wound around the winding pipe 9. At this time, the operation cord 3 abuts on the cord guide 12 on the indoor side and applies a clockwise torque to the operation unit 60, thereby causing the operation unit 60 to perform a pendulum motion, and the side end portion of the protruding piece 61 of the operation plate member 6a rotates the movable flap 40, thereby pressing the curtain fabric 4 on the outdoor side. Therefore, the interval d2 when the double ply cord 4 is operated is larger than the interval d1 when it is at rest. Therefore, at the time of the lifting operation, the double-ply fabric 4 relatively moves without generating friction, or only generates friction at a partial stage in the lifting process, or the friction force is weakened, so that there is no possibility of damaging the fabric 4. Further, the guide paths between the front-side rope guide portion 12 and the rope guide portion 13 and between the rear-side rope guide portion 12 and the rope guide portion 13, which are slightly larger than the outer shape of the ball portion 3a of the operation rope 3, are formed as follows: since at least two ball portions 3a connected at a predetermined pitch always abut on either one of the rope guide portions 12 and 13, rattling in the operation unit 60 during operation of the operation rope 3 can be suppressed, and operation noise caused by interference between the ball portions 3a and the rope guide portions 12 and 13 can be reduced.

Similarly, referring to fig. 24 (c), when the lower beam 5 is lowered by operating the operation cord 3 from a state in which the lower beam 5 is at the intermediate position or the upper limit position, for example, the curtain fabric 4 wound around the winding pipe 9 is lowered. At this time, the operation cord 3 abuts on the cord guide portion 13 on the indoor side and applies a clockwise torque to the operation unit 60, thereby causing the operation unit 60 to perform a pendulum motion, and the side end portion of the protruding piece 61 of the operation plate member 6a rotates the movable flap 40, thereby pressing the curtain fabric 4 on the outdoor side. Therefore, the interval d3 when the double ply cord 4 is operated is larger than the interval d1 when it is at rest. Therefore, at the time of the lowering operation, the double-ply fabric 4 relatively moves without generating friction, or friction is generated only at a partial stage in the raising and lowering process, or the friction force is weakened, so that there is no possibility of damaging the fabric 4. Even if friction occurs locally when the fabric winding thickness of the cord 4 approaches the upper limit, the frictional force tends to decrease.

Therefore, in the roll screen 1 of the seventh embodiment, at the time of the up-down operation, the operating unit 60 is rotated by the tensile force of the operating cord 3, so that the double-layered curtain 4 is relatively moved in a state of being separated from each other without friction (or friction is weakened even if friction is generated), and thus there is no possibility (or a possibility of damage to the curtain 4 is reduced). Further, since the operating cord 3 loses tension when in the stationary state and the operating unit 60 is rotated in the direction in which the double-ply fabric 4 approaches due to the weight of the fabric 4 or the like, the interval between the double-ply fabrics 4 can be reduced or the double-ply fabrics 4 can be brought into close contact with each other, and the light shielding property can be improved when the light transmitting portion 4b of the fabric 4 and the light shielding portion 4a are completely overlapped to form a light shielding state.

In addition, in the roller blind 1 according to the seventh embodiment, the fixing portion 2c of the mount frame 2 is configured to: since the fabric pressing plate 80, which can adjust the length of the fabric 4 by winding, is detachably locked to the fixing portion 2c, the length of the fabric 4 can be easily adjusted so as to be in a shielding state when, for example, the lower beam 5 is located at the lower limit position.

In addition, in the roll screen 1 of the seventh embodiment, the movable fin 40 is configured to have a length sufficient to close the gap between the mount 2 and the windup tube 9, and therefore, it is possible to further shield the external light incident from the gap between the mount 2 and the windup tube 9.

In addition, in the roll screen 1 of the seventh embodiment, at least two ball portions 3a connected at a predetermined pitch between the front side rope guide portion 12 and the rope guide portion 13 and between the rear side rope guide portion 12 and the rope guide portion 13 are always brought into contact with either one of the rope guide portions 12 and 13 and guided, and therefore, rattling in the operation unit 60 during operation of the operation rope 3 can be suppressed, and operation noise caused by interference between the ball portions 3a and the rope guide portions 12 and 13 can be reduced.

The present invention has been described above by taking examples of specific embodiments, but the present invention is not limited to the examples of the above embodiments, and various modifications can be made without departing from the technical spirit thereof. For example, although the indoor side and the outdoor side are specified in the respective embodiments, the indoor side and the outdoor side may be provided in the opposite directions.

In order to reliably separate the fabric 4 during operation, a biasing member such as a spring may be further provided to assist the pendulum movement moving in the direction in which the fabric 4 is separated.

(availability in industry)

According to the roll screen 1 of the present invention, the double-layer fabric 4 is relatively moved during the up-down operation without friction, or friction is generated only in a partial stage of the up-down process, or the frictional force is weakened, so that there is no possibility of damaging the fabric 4, and the interval between the double-layer fabrics 4 can be reduced or the double-layer fabrics 4 can be brought into close contact with each other when the fabric 4 is in a stationary state, and particularly when the fabric 4 has the light-transmitting portion 4b and the light-shielding portion 4a, the light-shielding property when the light-transmitting portion 4b and the light-shielding portion 4a are completely overlapped to be in the light-shielding state can be improved, so that the roll screen can be effectively used in the application of a blind using the double.

Claims (14)

1. A rolling shutter capable of relatively moving a double-layer curtain cloth in the vertical direction, the rolling shutter being characterized in that,

the rolling shutter is provided with an operating mechanism which performs pendulum motion so that the interval of the double-layer curtain cloth which is configured to be relatively movable is always increased when the double-layer curtain cloth is lifted up and lowered down, and the double-layer curtain cloth is always closer to or attached to each other when the lifting up and lowering down are stopped than when the interval is increased.

2. The roller shutter according to claim 1,

the operating mechanism performs pendulum movement in such a manner that the interval of the double-layer curtain cloth during operation is greater than the interval of the double-layer curtain cloth during rest.

3. The roller shutter according to claim 1 or 2,

the double-layer curtain cloth is alternately provided with light-transmitting parts for transmitting partial light and light-shielding parts for shielding the light.

4. The roller shutter according to claim 1 or 2,

the double-layer cord fabric is formed by folding a cord fabric,

the rolling curtain is provided with a winding pipe and a support shaft, one side of the curtain cloth is installed on the winding pipe, the curtain cloth is suspended and supported on the winding pipe in a windable mode, the other side of the curtain cloth which hangs down from the winding pipe and is folded back through a counterweight component is installed and supported on the support shaft,

the operating mechanism performs a pendulum motion so that a positional relationship between the take-up tube and the support shaft changes between a positional relationship at a time of rest and a positional relationship at a time of operation.

5. The roller shutter according to claim 4,

the operating mechanism is configured to have a point of force application,

the force receiving point is engaged with an operation rope for operating the opening and closing of the double-layer curtain cloth, and the force is applied to the force receiving point by the pulling force of the operation rope during operation, so that the operation mechanism and the support shaft rotate together in the direction of separating the double-layer curtain cloth.

6. The rolling shutter according to claim 5, wherein the support shaft is provided at a position below the winding pipe and near an indoor side.

7. The roller shutter according to claim 1 or 2,

the double-layer cord fabric is formed by folding a cord fabric,

the rolling shutter is provided with a winding pipe and a fixing member, one side of the curtain cloth is installed on the winding pipe, the curtain cloth is suspended and supported on the winding pipe in a windable mode, the other side of the curtain cloth, which hangs down from the winding pipe and is folded back through a counterweight member, is installed and supported at a position above the winding pipe through the fixing member,

the operation mechanism is provided with an operation unit which always performs pendulum motion when operated by an operation rope, and a fabric interval adjustment member which increases the interval of the double-layer curtain cloth along with the pendulum motion of the operation unit and always performs motion relative to the other side of the curtain cloth in a manner that the double-layer curtain cloth is closer to or attached to each other when the interval is increased when the operation is not performed.

8. The roller shutter according to claim 7,

the fabric gap adjusting member includes a movable flap that presses the double-layer fabric so as to increase the gap between the double-layer fabric in accordance with the pendulum movement of the operation unit, and the movable flap is rotatably suspended by a base shaft thereof from the fixed member.

9. The blind of claim 8,

the movable flap has a length sufficient to close the gap between the fixed member and the winding tube.

10. The roller shutter according to claim 7,

the fabric interval adjustment member includes a fixing lever that presses the double-ply fabric so as to increase the interval of the double-ply fabric in accordance with the pendulum movement of the operation unit, and is fixed to a part of the operation unit.

11. The roller shutter according to claim 7,

the operation unit is provided with a rotation restricting member that restricts a rotation range of the pendulum motion.

12. The blind of claim 11,

the operation unit has a rope guide portion that guides the hanging of the operation rope and supports the operation rope so as to cause the operation unit to perform a pendulum motion.

13. The blind of claim 12,

the operating mechanism is provided with an operating rope consisting of a ball chain formed by connecting a plurality of ball parts,

the cord guide portion is configured to: at least two of the ball portions connected at a predetermined pitch are always brought into contact with the rope guide portion to be guided.

14. The roller shutter according to claim 7,

the fixing member has a fabric pressing plate that can be wound around an end of the fabric to adjust the length of the fabric, and a fixing portion to which the fabric pressing plate is detachably fixed.

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