JP2002106272A - Rolling screen device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling screen device capable of providing ventilation and a fine view. SOLUTION: A first winding shaft 1 incorporating a tensile mechanism is joined with a longitudinal one end of a long screen 3 and respective one ends of a pair of cords 4 are joined with the other end. The respective other ends of the cords 4 are joined with a second winding shaft 2 incorporating a drive mechanism. If the long screen 3 has different light shielding states, a various shielding states can be materialized by sliding the long screen 3 and the ventilation and fine view can be provided by completely winding up the long screen 3 by the first winding shaft 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll screen device mounted on a window opening for adjusting lighting, visibility, ventilation, and the like.

[0002]

2. Description of the Related Art Conventionally, a roll screen device attached to a window opening for adjusting lighting, visibility, ventilation and the like has been widely used. In general, a roll screen device is a device that opens and closes a screen by arranging a winding shaft including a winding spring and the like above a window and winding or lowering a screen having a size substantially equal to the size of a window opening. is there. However, the above-described roll screen device has a problem that only a single light-shielding state depending on the light-shielding property of the screen material can be realized. For example, when a roll screen device is used for the purpose of bringing a room into a dimming state, that is, a state in which light is appropriately transmitted, the room cannot be completely shaded, that is, a state in which the whole is darkened.

In order to solve the above problem, a winding screen arranged vertically is used, using a long screen whose color, pattern, pattern, transparency, etc. changes gradually or stepwise in the longitudinal direction, ie, the winding direction. Japanese Patent Laid-Open No. 4-53 discloses a roll screen device which realizes a desired light-shielding state such as dimming, semi-light-shielding, and total light-shielding by causing a long screen to be fed back.
No. 86 is described. In the above-described apparatus, as shown in the schematic diagram of FIG. 14, a mechanism in which the long screen 3 is fed back between the first winding shaft 1 and the second winding shaft 2 disposed at the upper and lower ends of the window. It is. Therefore, if the long screen 3 has various portions in the light-shielding state, the light-shielding state can be freely changed by the feeding back.

However, since the screen is always stretched between the winding shafts, it is not possible to realize the open state of the window, which causes adverse effects on the ventilation and outside view. This has not been implemented to date.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and provides a roll screen device capable of selectively using a plurality of light-shielding states, and providing an outside view and ventilation. That is the task.

[0006]

According to a first aspect of the present invention, there is provided a screen, comprising: a screen having a length in a winding direction larger than a length in a winding direction of a window opening;
In a roll screen device having a pair of winding shafts for winding the screen from opposite directions, at least one end of the screen in the winding direction and the winding shaft are joined via a cord to form the one end. By providing a roll screen device characterized by providing an interval between the screen and the winding shaft, if a variety of light shielding states are provided on the screen, the light shielding state is changed by winding the screen. At the same time, it becomes possible to realize a ventilation view state.

According to the present invention, the ends of the string are joined to at least one end in a winding direction of the screen, and the string is hooked in a string hook groove provided in a width direction on a winding shaft. 2. The lock according to claim 1,
By using the roll screen device described above, if the screen is provided with various light-shielding states, it is possible to change the light-shielding state and realize the ventilation view state by winding the screen, and furthermore, the horizontal length of the string is automatically Adjusted.

According to a third aspect of the present invention, a connecting member for inserting a string is provided on at least one end in the winding direction of the screen, and both ends of the string passing through the connecting member for inserting the string are wound. The roll screen device according to claim 1, wherein the screen is provided with various light-shielding states, so that the screen can be wound to change the light-shielding state and realize the ventilation view state. It becomes possible, and the left and right length of the string is automatically adjusted.

According to the present invention, the winding shaft is provided with two string winding portions which are concave portions for winding the string around the winding shaft, and the string winding portion winds all the strings. The roll screen device according to any one of claims 1 to 3, wherein the roll screen device has a diameter such that the rope does not protrude from the winding shaft even in a retracted state. Does not cause swelling on the winding shaft,
Therefore, there is no interference with the screen.

The invention according to claim 5 is characterized in that the string and the screen have a shape in which the inner surface is along the outer peripheral surface of the winding shaft.
5. The roll screen device according to claim 1, wherein the outer surface is joined via a connecting member having a smooth curved surface having a substantially circular arc cross section. The appearance of the connected connecting member becomes a smooth curved surface, and the appearance is improved because the screen wound on top of the connecting member cannot be wrinkled, and
Since the winding speed is substantially constant, the durability is improved.

According to a sixth aspect of the present invention, the image forming apparatus further includes a guide portion provided at both ends in the width direction of the window opening to guide the movement of the connecting member in the winding direction by slidingly contacting both end portions of the connecting member. According to the roll screen device of the fifth aspect, the connecting member can operate stably without falling off from a predetermined position even by a disturbance generated in a strong wind or the like, and the reliability is improved.

The invention according to claim 7 is characterized in that spherical connecting portions are provided at both ends of the connecting member so as to be rotatable and partially project in the width direction. In the roll screen device according to item 6, since the contact portion reduces the friction between the connecting member and the guide portion, damage due to abrasion is prevented due to a reduction in driving load, and the life is extended.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings. FIG. 1 is a schematic view of a roll screen device which is an example of an embodiment of the present invention,
FIG. 2 shows a schematic view of the long screen 3 with the string 4 in one example. The long screen 3 for covering the window opening (not shown) and adjusting the light blocking state has a length in the width direction substantially equal to the width of the window opening, and has a length in the longitudinal direction as the window opening. The shape is a rectangle larger than the length. The long screen 3 is a series of screens whose light-shielding property changes gradually or stepwise in the longitudinal direction. The screen is made of a material capable of changing the light-shielding property, such as a film, paper, or cloth. I just want it. The long screen 3 may be a series of screens having different colors, patterns, patterns, light-shielding properties, etc. connected in the longitudinal direction.

For example, a first take-up shaft 1 having a tension mechanism (not shown) such as a take-up spring is installed above the window opening, and a drive mechanism such as a motor (not shown) is provided below the window opening. 2) is installed. The first winding shaft 1 is joined to one end of the long screen 3, and each end of a pair of strings 4 is joined to the other end. The other ends of the pair of strings 4 are joined to the second winding shaft 2 such that the lengths of the strings 4 on the right and left sides are the same and are sufficiently larger than the window opening length. A constant tension is applied to the long screen 3 by a tension mechanism provided on the first winding shaft 1, and the long screen 3 is rotated by the drive mechanism to rotate the second winding shaft 2 forward or reverse. The feed back is performed with the tension. The light-shielding state is changed as described above, but depending on the winding amount, the long screen 3 is completely wound up, and both winding shafts 1,
An open state of the window opening where only the string 4 is stretched between the two can be realized.

The joining method is not limited as long as it has a strength enough to withstand the tension when the long screen 3 is fed back. As the string 4, a wire,
It shall be thin and rewindable, such as tape. Also string 4
Is fixed to one end of the long screen 3 that joins with the reinforcing member 7 such as a metal that has a thickness that does not interfere with the winding and has sufficient strength and extends in the width direction. deep. The above-mentioned reinforcement prevents the long screen 3 from being partially deformed when the string 4 is pulled.

FIG. 3 is a schematic view showing a joined state between the string 4 and the second winding shaft 2. One end of each of the pair of strings 4 is a string winding portion 5 which is two concave portions provided on the second winding shaft 2.
The portion sandwiched between the two string winding portions 5 is a screen winding portion 6. The long screen 3 is moved by winding the string 4 around the string winding section 5. At this time, the winding portion gradually rises due to the thickness of the string 4 wound up, so that the long screen 3 is wrinkled due to the rising. Therefore, as shown in FIG.
Is set so that the string 4 does not protrude from the second winding shaft 2 even when all the strings 4 are wound, the wound string 4 interferes with the winding of the long screen 3. Can be prevented.

FIG. 4 is a schematic view of each light shielding state. (A) is an open state, and ventilation ventilation and an outside view are possible. (B) is a dimming state, in which the room can be kept at a moderate brightness by entering soft light. (C) is a completely light-shielded state, in which the sunlight can be cut and the room can be made dark.

In order to realize each of the above light shielding states, it is necessary to stop the long screen 3 at a desired position. In this example, the rotation is performed by a DC motor (not shown), and the motor is used by utilizing the fact that the number of pulses of the ripple component superimposed on the current waveform at the time of rotation of the DC motor is proportional to the motor rotation speed. By calculating the driving amount, the long screen 3 is accurately shifted. In other words, the number of pulses of the ripple component superimposed on the radio wave waveform when the DC motor is rotating is detected, and the total length of the long screen 3 is self-recognized based on the detection result. Using the length ratio data, the amount of movement of the long screen 3 for shifting to each light shielding state is determined by the number of pulses of the ripple component, and the long screen 3 is reliably shifted to each light shielding state position and stopped. .

Hereinafter, the long screen 3 will be described with reference to the drawings.
Will be described. Figure 5 shows a long screen 3
It is a schematic diagram showing the winding state of (a), the state in which the first winding shaft 1 completely winds up the long screen 3,
(B) shows a state where the second winding shaft 2 completely winds up the long screen 3. FIG. 6 is a schematic block diagram of a pulse number detecting unit of a ripple component of the DC motor, and FIG. 7 is a schematic diagram showing a positional relationship between light shielding states on the long screen 3.

After setting the long screen 3 in the state shown in FIG. 5A as an initial state, the DC motor is driven to move the long screen 3 until the state shown in FIG. 5B is reached. In the meantime, as shown in FIG. 6, the number of pulses of the ripple component superimposed on the current waveform of the DC motor
U, etc., and the count number is defined as L ', E ² P
It is stored in a storage device such as a ROM. The position information of each light-shielded state is stored as ratio data for the long screen 3 in advance.
Set in the PU, and the long screen 3
Based on the count L 'in the entire length of the screen, the number of counts required to shift to the desired position, that is, the drive amount of the DC motor, is calculated, and the second winding shaft 2 is rotated so that the long screen 3 To another light blocking state.

For example, in FIG. 7, when the long screen 3 of the entire length L is stopped in the dimming 1 state, the state can be shifted to the dimming 2 state by moving the screen by the distance L2. Therefore, by rotating the DC motor in the direction from the dimming 1 to the dimming 2, the long screen 3 of the entire length L is moved and the number of ripples is counted, and when the counted number reaches L ′ × L2 / L. Stop the DC motor rotation. Thereby, the shift to the light control 2 is achieved.

Similarly, for example, in FIG. 7, to shift from the light blocking 2 state to the dimming 2 state, the DC motor is rotated in the opposite direction to the above, and the count number becomes L '× (L4 + L
3) It may be stopped at the time when / L is reached.

If the length of each light-shielding state is set sufficiently longer than the window opening length in consideration of the effect of expansion and contraction during long-term use, a desired light-shielding can be obtained even if a slight displacement occurs. Can stop in state.

Next, another example of the embodiment of the present invention will be described, but the configuration similar to that of the example will be omitted. FIG. 8 is a schematic view of a roll screen device as another example, FIG. 9 is a schematic view of the long screen 3 with the string 4 of the above, and FIG. 10 is a schematic view of the second winding shaft 2 of the same. Each is shown.

As shown in FIG. 9, one end of the long screen 3 in the longitudinal direction is joined to both ends of one string 4 at both ends in the width direction. By making the overall length of the string 4 having a substantially U shape larger than the window opening length × 2 + the window opening width, an open state can be realized when the long screen 3 is completely wound up.

As shown in FIG. 10, the second take-up shaft 2 is provided with a string hooking groove 8 in the width direction, and as shown in FIG. To be locked on the second winding shaft 2. The tension mechanism built into the first winding shaft 1 causes a uniform tension to be applied to the string 4 in the left and right directions. Therefore, when the length of the string 4 is different between the left and right, the string 4 slides at the hook groove 8. This automatically adjusts the left and right lengths to be the same.

Next, still another example of the embodiment of the present invention will be described, but the configuration similar to that of the example will be omitted. FIG. 11 is a schematic diagram of a roll screen device as still another example, and FIG. 12 is a schematic diagram of a long screen 3 with a string 4 in the same embodiment.

As shown in FIGS. 11 and 12, a reinforcing member 7 provided at the end of the long screen 3 on the side of the second winding shaft 2 is provided.
Is a hollow metal member extending in the width direction, and the reinforcing member 7
One string 4 penetrates through the hollow portion of the reinforcing member 7.
Also has a role as a connecting member 7a for string insertion.
The string 4 has both ends joined to the string winding portion 5 of the second winding shaft 2 to have a substantially U shape. At this time, as in the other examples, if the entire length of the string 4 is larger than the window opening length × 2 + the window opening width, the long screen 3 is completely opened by the first winding shaft 1 and is in the open state. Becomes When the length of the right and left of the string 4 is different, the length is automatically adjusted so that the length of the right and left is the same by sliding the string 4 in the hollow portion of the reinforcing member 7.

In one example, another example, and still another example of the present invention, the string 4 is joined to the roll screen device as a method for providing the outside view and the ventilation, but as shown in another example shown in FIG. In addition, a part of the long screen 3 has a net 9 for insect repellent.
May be joined.

Next, still another example of the embodiment of the present invention will be described, but the configuration similar to that of the example will be omitted. FIGS. 15A and 15B are explanatory views of a wound state of a roll screen device as still another example, and FIG. 16 is an enlarged view of the connecting member 7a in FIG. 15A.

As shown in FIG. 15A, a plate 10 is adhered to the end of the long screen 3 on the side of the second winding shaft 2, and the plate 10 is placed in a state substantially parallel to the long screen 3. Via a connecting member 7a having a long screen locking portion 11 that locks with a string and a string locking portion 12 that hooks and locks a single string 4 having both ends joined to the second winding shaft 2. Thus, the string 4 and the long screen 3 are connected. The connecting member 7a
Also plays a role as a reinforcing member 7, and is formed of a material having sufficient rigidity even in a long size, for example, aluminum, stainless steel, iron, resin, or the like.

However, regarding the shape of the second winding shaft 2 and the method of joining the string 4 to the second winding shaft 2 and the connecting member 7a, any one of the described examples, other examples, still other examples, and other examples. It may be the same as.

The shape of the connecting member 7a is such that the inner surface 13 is formed along the cylindrical outer peripheral surface of the second take-up shaft 2, and the outer surface 14 is smooth in a substantially arc-shaped cross section which is elongated in the width direction. Make it a curved surface. In addition, a hollow portion is formed in the connecting member 7a, and the hollow portion on the long screen 3 side is the above-described long screen locking portion 11, and the hollow portion on the string 4 side is the above-described string locking portion 12. . With such a hollow and arcuate shape, the connecting member 7a has sufficient rigidity even in a long size, and in addition, when connecting the plate member 10 to the long screen 3, Long screen locking part 1 from the side in a state substantially parallel to
It is only necessary to slide it into the unit 1 and the operation is simple.

As shown in FIG. 16, the long screen locking portion 11 and the string locking portion 12 are each provided with a pulling force F
1 and the tensile force F2 are formed so as to be substantially on the same straight line. As a result, the connecting member 7a is pulled by the tension mechanism in the first winding shaft 1 and rotates in an unstable manner, and is caught by the frame 15 supporting the roll screen device, the second winding shaft 2 and the like at the time of winding. Is prevented. Further, the inner surface 1 communicates with the long screen locking portion 11.
The shape near the opening provided on the third side is a smooth curved surface to protect the long screen 3.

When the longitudinal screen 3 is wound by the rotation of the second winding shaft 2, as shown in FIG. 15 (b), the connecting member 7 a is connected to the outer surface of the second winding shaft 2 by the inner surface 13. Since the longitudinal screen 3 is wound along the outer surface 14 of the connecting member 7a while being in contact with the surface, the connecting member 7a is interposed between the longitudinal screen 3 and the second winding shaft 2. Also, the longitudinal screen 3 has a smooth outer peripheral shape.

By the way, in still another example, as described above, the connecting member 7a is formed in a hollow having a substantially arc-shaped cross section, and the plate member 10 is locked substantially horizontally with the longitudinal screen 3 in the hollow portion. For example, as shown in FIG. 19, in the case of using a conventional connecting member 7a formed in a hollow having a substantially circular cross section and locking the plate 10 substantially perpendicularly to the longitudinal screen 3, as shown in FIG. Thus, the second winding shaft 2 and the connecting member 7a become integral with each other, and the longitudinal screen 3 is wound into a substantially cam shape in cross section. In this case, the winding speed becomes unstable and the winding wrinkles are likely to occur, and the contact area between the long screen 3 and the connecting member 7a is small. There is a problem that the shading screen 3 easily changes in heat, but in still another example, the connecting member 7a is formed to be smooth and thin so as to fit the outer shape of the second winding shaft 2, and the above problem is solved. Can be achieved.

Next, still another example of the embodiment of the present invention will be described, but the configuration similar to that of the other example is omitted. FIG. 17 is an explanatory view showing still another example of the connecting member guide mechanism, and FIG. 18 is a schematic view of a protective cap 17 provided on the connecting member 7a of the above.

As shown in FIG. 17, a frame 15 provided at the window opening to support the roll screen device includes
A pair of guide portions 16 are provided integrally or as separate members so as to be located at both ends in the width direction of the window opening. The guide portion 16 is formed continuously from the first take-up shaft 1 side of the roll screen device to the second take-up shaft 2 side, and slidably contacts both ends of the connecting member 7a to take up the connecting member 7a. The first guide portion 16a guides the movement in the left and right directions, and regulates the movement in the left and right direction in FIG.
And a second guide portion 16b extending in the width direction from the end of the first guide portion 16a and restricting vertical movement in FIG.

At both ends in the width direction of the connecting member 7a, protective caps 17 for reducing contact friction with the guide portions 16 are provided.
Are fitted respectively. The protection cap 17 is formed of a resin capable of reducing friction,
On the side surface facing 6a, a spherical contact portion 18 is provided so as to be rotatable and partially project in the width direction.
Also, a predetermined clearance is provided between the connecting member 7a and the guide portion 16 in the left-right direction and the up-down direction in FIG.

With the above-described structure, the rising of the long screen 3 when the wind is received, the lateral displacement of the connecting member 7a caused by the difference in the tension of the string 4, the falling of the connecting member 7a from the window opening due to disturbance, and the like. Is prevented.

FIG. 18 shows a protective cap 17 in which a plurality of contact portions 18 are provided so that the connecting member 7a does not tilt when contacting the frame 15. In addition to reducing friction at the end of the connecting member 7a in this way, a protective cap 17 is formed along the outer surface 14 of the connecting member 7a to reduce friction between the connecting member 7a and the frame 15. It may be.

[0042]

As described above, according to the first, second and third aspects of the present invention, if the screen is provided with various light shielding states, the light shielding state is changed by winding the screen. At the same time, it becomes possible to realize a ventilation view state. Therefore, it is possible to selectively use the state in which the room is darkened, the state in which moderately soft light is employed, and the state in which the ventilation view is used, thereby greatly improving the usability. In addition, it is possible to adjust the state from the total light shielding to dimming to ventilation as described above continuously and with a simple operation of only opening and closing.

According to the second and third aspects of the present invention, since the left and right lengths of the string are automatically adjusted, there is no need to make fine adjustments during the assembling work, and the work is simplified. In addition, there is no need to adjust the cord even if the cord is stretched during use.

According to the fourth aspect of the present invention, since the swelling of the wound string from the second winding shaft does not interfere with the screen, the screen does not wrinkle.

According to the fifth aspect of the present invention, since the outer shape of the connecting member wound on the winding shaft has a smooth curved surface, the screen is wound on the connecting member. The appearance is improved because no wrinkles are formed, and the durability is improved because the winding speed is substantially constant.

According to the sixth aspect of the present invention, since the connecting member operates stably without falling off from a predetermined position even by a disturbance generated in a strong wind or the like, the reliability is improved.

According to the seventh aspect of the present invention, since the contact portion reduces the friction between the connecting member and the guide portion, the drive load is reduced, so that damage due to wear is prevented and the life is extended. Can be

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an example according to an embodiment of the present invention.

FIG. 2 is a schematic view of a long screen with a string in one example.

FIG. 3 is a schematic view showing a joined state of a string and a second winding shaft in one example.

FIGS. 4A and 4B are schematic diagrams of each light blocking state in one example, where FIG. 4A is an open state, FIG. 4B is a dimming state, and FIG.

FIGS. 5A and 5B are schematic diagrams illustrating a state in which a long screen is wound in one example, in which FIG. 5A illustrates a state in which a first winding shaft completely winds the long screen, and FIG. This shows a state in which the long screen is completely wound up.

FIG. 6 is a schematic block diagram of a ripple component pulse number detection unit in an example DC motor.

FIG. 7 is a schematic diagram showing a positional relationship between light shielding states on a long screen in one example.

FIG. 8 is a schematic diagram of another example according to the embodiment of the present invention.

FIG. 9 is a schematic view of a long screen with a string in another example.

FIG. 10 is a schematic view of a second winding shaft in another example.

FIG. 11 is a schematic diagram of still another example of the embodiment of the present invention.

FIG. 12 is a schematic view of a long screen with a cord in still another example.

FIG. 13 is a schematic diagram of another example according to the embodiment of the present invention.

FIG. 14 is a schematic view showing an example of an embodiment according to the invention described in JP-A-4-5386.

FIGS. 15A and 15B are explanatory views of a state in which a long screen is wound up according to another embodiment of the present invention, wherein FIG. 15A shows a state before winding up a connecting member, and FIG. It shows the state where it was turned on.

FIG. 16 is an enlarged view of a connecting member in FIG.

FIG. 17 is an explanatory view showing still another example of the connection member guide mechanism in the embodiment of the present invention.

FIG. 18 is a schematic view of a protective cap provided on a connecting member in still another example.

FIG. 19 is an explanatory view showing a conventional connecting member.

FIG. 20 is an explanatory view showing a state where a long screen is wound up using a conventional connecting member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First winding shaft 2 Second winding shaft 3 Long screen 4 String 5 String winding section 6 Screen winding section 7 Reinforcement member 8 String hanging groove 9 Net 13 Inner surface 14 Outer surface 16 Guide portion 17 Protective cap 18 Contact Department

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Adachi 1048 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. 72) Inventor Minoru Hibino 1048 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd.

Claims (7)

[Claims] 1. A roll screen apparatus comprising: a screen having a length in a winding direction larger than a length of a window opening in a winding direction; and a pair of winding shafts for winding the screen from opposite directions. A roll screen device, wherein at least one end of the screen in the winding direction and the winding shaft are joined via a cord to provide a space between the one end and the winding shaft. 2. The method according to claim 1, wherein both ends of the string are joined to at least one end in the winding direction of the screen, and the string is hooked and locked in a string hook groove provided in the width direction on the winding shaft. The roll screen device according to claim 1. 3. The screen according to claim 1, wherein a connecting member for inserting a string is provided at at least one end in a winding direction of the screen, and both ends of the string penetrating the connecting member are joined to a winding shaft. Roll screen equipment. 4. The winding shaft is provided with a string winding portion which is a concave portion for winding the string, and the string winding portion has a structure in which the string is wound from the winding shaft even when all the strings are wound. The roll screen device according to any one of claims 1 to 3, wherein the roll screen device has a diameter that does not protrude. 5. The string and the screen are joined via a connecting member whose inner surface is shaped along the outer peripheral surface of the winding shaft and whose outer surface is a smooth curved surface having a substantially arc-shaped cross section. The roll screen device according to claim 1. 6. A window according to claim 5, further comprising guide portions provided at both ends in the width direction of the window opening to guide the movement of the connecting member in the winding direction by slidingly contacting both end portions of the connecting member. Roll screen device. 7. A spherical contact portion at both ends of the connecting member,
7. The roll screen device according to claim 6, wherein the roll screen device is provided so as to be rotatable and partially project in the width direction.