JPH10212880A - Opening/closing device of screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing device which lessens the drive load of a slider fitted to one end edge of a screen. SOLUTION: Driving gears 8a, 8b connected by a pipe 11 are provided at one side of a rectangular frame body 2 and driven gears 9a, 9b connected by a connection shaft 16 are provided at the opposite side. Flexible ropes 10a, 10b with gears are laid and the pipes 11 are driven by an electric motor 12. A winding roll 5 is provided at the periphery of the connection shaft 16. The connection shaft 16 and the winding roll 5 are connected together through a tensing means 6. The tensing means 6 always gives a tension in the direction winding up the screen 4 to the winding roll 5. Since the tensing means 6 and the winding roll 5 are rotated in accordance with the sliding motion of the slider 3, the driving load of the motor 12 is small. Even if the rotary quantity of the winding roll 5 is different from the transferred distance, the difference is absorbed by the tensing means 6 and the screen 4 does not get loose or tight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening and closing device using a roll screen for opening and closing an opening.

[0002]

2. Description of the Related Art Conventionally, an opening / closing device using a roll screen employs a structure in which a support shaft of a winding roll for winding a screen is fixed to one side of a frame and one edge of the screen is slid. As means for sliding one edge of the screen, a slider is provided at one edge of the screen, a wire or geared cable is connected to the slider, and the wire or geared cable is driven by an electric motor.

[0003]

An opening / closing device using a roll screen drives a screen to be rewound, so that the driving load increases as the screen closes an opening. For this reason, the remaining power of the electric motor decreases as the screen closes the opening, causing a problem that the opening / closing speed of the screen slows down, and a large driving capability is required for the electric motor. There is a problem that the cost increases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a screen opening / closing apparatus capable of reducing a driving load of a slider attached to one edge of a screen.

[0005]

The screen opening / closing device of the present invention employs the following technical means. [Means of claim 1] The screen opening and closing device comprises a rectangular frame, a slider slidably provided between one side and the other side of the frame, and a driving means for slidingly driving the slider. A flexible screen having a film shape with one edge fixed to the slider, and a winding roll for winding the screen, wherein the winding roll applies tension in a direction in which the screen is wound. Via a rotary member that is driven to rotate in accordance with the slide of the slider.

According to a second aspect of the present invention, in the screen opening and closing apparatus according to the first aspect, the driving means is provided on one side and the other driving gear provided on both sides of the one side, respectively, and on both sides of the other side. One and the other driven gears, the one drive gear and a flexible one-gear rope wound over the one driven gear, and the other drive gear and the other driven gear over the other driven gear. The other flexible geared rope, a coupling member that couples the one drive gear and the other drive gear, and an electric motor that rotationally drives the one and other drive gears coupled by the coupling member A motor, and control means for stopping the operation of the electric motor when an overcurrent occurs due to an increase in load during operation of the electric motor; one end of the one geared rope; And one end of the other geared rope is attached to the slider via a compression spring, respectively, and the other end of the one geared rope and the other end of the other geared rope are connected via a tension spring. It is characterized by being connected.

According to a third aspect of the present invention, in the screen opening and closing apparatus according to the second aspect, the rotating member includes the one and other driving gears and a coupling shaft that couples the one and the other driven gears. The tension applying means is a torsion spring having one end coupled to the coupling shaft, the other end coupled to the winding roll, and assembled with a torsional load applied.

According to a fourth aspect of the present invention, in the screen opening and closing apparatus according to the second or third aspect, the rope with the gear is joined by winding a flexible wire spirally around a flexible core wire. It is characterized by becoming.

[0009]

When the slider is driven to slide away from the winding roll, the screen wound around the winding roll is unwound and the frame is closed by the screen. Conversely, when the slider is slid toward the side closer to the winding roll, the screen is wound around the winding roll, and the frame closed by the screen is opened.

[0010]

When the screen is unwound from the winding roll (when closed) and when the screen is wound around the winding roll (when opened), the winding roll is driven to rotate by the rotating member via the tension applying means. Therefore, even if the opening / closing ratio of the screen changes, the driving load applied to the slider can be reduced. For this reason, when an electric motor is used as the drive source of the driving means, the size of the electric motor can be reduced, and the cost can be reduced. In addition, when a manual drive is used as the drive source of the drive unit, the operation load can be reduced.

On the other hand, by rotating the winding roll in accordance with the sliding of the slider, there is a difference between the sliding amount of the slider and the rotating amount of the winding roll (for example, a change in the diameter due to a change in the winding amount of the screen or a change in the diameter). , The difference between the diameter of the winding roll and the diameter of the rotating member), and the screen is loosened or stretched so that it cannot operate. However, in the present invention, since the tension is applied to the winding roll in the direction in which the screen is wound by the tension applying means, there is no problem that the screen is loosened or stretched and cannot operate. The tension applying means rotates almost together with the winding roll and the rotating member, and the generated tension may be a force for suppressing the slack of the screen and the tension, so that the driving load of the slider due to the tension generated by the tension applying means is sufficient. Rise is small.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples and modifications. FIG. 1 is a top sectional view of a screen opening / closing device, FIG. 2 is a cross sectional view of the screen opening / closing device, FIG. 3 is a sectional view taken along a winding roll of the screen opening / closing device, and FIG. FIG. 5 and FIG. 5 are views showing a state in which a rope with gears are engaged, FIG. 6 is a perspective view of a tension applying means and a rotating member, and FIG.

The screen opening / closing device 1 is attached to a lower part of a skylight (not shown) and includes a rectangular frame 2 having an opening 2a communicating with the inside of the skylight. The screen opening / closing device 1 includes a slider 3 slidably provided from one side of the frame 2 to another side opposite thereto, and a driving unit for driving the slider 3.

Further, the screen opening / closing apparatus 1 has a film-like flexible screen 4 (for example, a resin coated on the surface), one end of which is fixed to the slider 3 and which opens and closes the opening 2a by sliding of the slider 3. A coated cloth material, etc.), a winding roll 5 for winding the screen 4, a tension applying means 6 for applying a tension to the winding roll 5 in a direction in which the screen 4 is wound, and a winding roll via the tension applying means 6. 5 is provided with a rotating member 7 that rotates the slider 5 in accordance with the sliding of the slider 3.

The slider 3 has a slide piece 3a fixed to one edge of the screen 4, and a slide block 3b fixed to both sides of the slide piece 3a and fixed to geared ropes 10a and 10b, which will be described later.
The slide blocks 3 b on both sides are slidable along rails 2 b provided on both sides of the frame 2.

The driving means opens and closes the screen 4 by slidingly driving the slider 3. One and the other driving gears are provided on both sides of one side of the frame 2 (side facing the winding roll 5). 8a, 8b,
One and the other driven gears 9a and 9b are provided on both sides of the other side (side on the winding roll 5 side) of the frame 2, respectively.

The driving means includes one geared rope 10a exhibiting flexibility which is bridged over one drive gear 8a and one driven gear 9a, and is bridged over the other drive gear 8b and the other driven gear 9b. And the other geared rope 10b exhibiting improved flexibility. One and the other geared ropes 10a, 10b are arranged around a flexible metal core wire,
A flexible metal wire is spirally wound regularly and joined,
Flexible geared cable whose surface is coated with resin (for example, synchromesh rope = trade name)
Is adopted.

The driving means includes a pipe 11 (corresponding to a connecting member) for connecting one driving gear 8a and the other driving gear 8b, and the one and other driving gears 8a connected by the pipe 11. , 8b. This electric motor 12
Is a geared motor built in the pipe 11, and when energized, simultaneously drives one and the other drive gears 8a, 8b via the pipe 11.

The operation of the electric motor 12 in the pipe 11 is controlled by a switch box 13 (corresponding to control means) having an open switch 13a, a close switch 13b, and a stop switch 13c, and the open switch 13a is turned on.
Then, the electric motor 12 is rotated in the direction in which the screen 4 is opened, and when the close switch 13b is turned on, the electric motor 12 is rotated in the direction in which the screen 4 is closed. With electric motor 12
This is to stop the rotation of. The switch box 13 is electrically operated when the electric motor 12 is operated and an overcurrent occurs due to an increase in load (when the slider 3 comes into contact with the frame 2 and cannot move when fully opened or closed frontward). A function for stopping the operation of the motor 12 is provided.

One end of one geared rope 10a and one end of the other geared rope 10b are attached to the slider 3 via compression springs 14, respectively, as shown in FIG. Specifically, one end of the compression spring 14 is fixed to the slide block 3b, and the other end of the compression spring 14 is fixed to one end of one geared rope 10a (one end of the other geared rope 10b). For this reason, when the tension at one end of one geared rope 10a (one end of the other geared rope 10b) increases, the compression spring 14 contracts, and conversely, one end of one geared rope 10a (the other geared rope 10b). As the tension at one end decreases, the compression spring 14 extends.

The other end of one geared rope 10a and the other end of the other geared rope 10b are connected via a tension spring 15. Therefore, when the tension at the other end of the one rope with gear 10a and the other end of the other rope with gear 10b increases, the tension spring 15 extends, and conversely, the other end of one rope with gear 10a and the other rope with gear. When the tension at the other end of 10b decreases, the tension spring 15 contracts.

The screen 4 functions as a light-shielding screen for blocking the passage of light. One end is fixed to the slide piece 3a of the slider 3 as described above, and the other end is fixed to the winding roll 5. I have.

The winding roll 5 is arranged concentrically with one and the other driven gears 9a, 9b, and has circular recesses 9a ', 9 formed inside the one and the other driven gears 9a, 9b.
It has a substantially pipe shape fitted to b ′ and rotatably supported. The winding roll 5 is rotationally driven by the rotating member 7 via the tension applying means 6 according to the sliding of the slider 3 as described above. That is, when the slider 3 moves in the direction of closing the screen 4, the winding roll 5 is driven to rotate in the direction of unwinding the screen 4, and conversely, when the slider 3 moves in the direction of opening the screen 4, the winding roll 5 winds up It is driven to rotate in the direction.

The rotating member 7 includes one and the other driven gears 9a and 9b, and the one and the other driven gears 9a and 9b.
b. The tension applying means 6 uses a torsion spring 17, and one end of the torsion spring 17 has a groove 16 a provided in the coupling shaft 16.
And the other end thereof is connected to the winding roll 5, and the torsion spring 17 is subjected to a torsional load (a load in the direction of winding the screen).
Has been assembled.

In this embodiment, the other end of the torsion spring 17 and the connecting shaft 16 are connected via a resin ring 18. The resin ring 18 is rotatably mounted on the coupling shaft 16, and the other end of the torsion spring 17 is locked to the resin ring 18. On the other hand, the winding roll 5 is provided with a projection 5a projecting inward and extending in the axial direction, and the resin ring 18 is formed with a recess 18a that fits into the projection 5a.
Is fitted to the projection 5a of the winding roll 5 and assembled, whereby the other end of the torsion spring 17 and the coupling shaft 16 are coupled.

[Operation of Embodiment] (Open → Close) When the close switch 13b is turned on, the switch box 13 rotates the electric motor 12 in the closing direction. The rotation output of the electric motor 12 is similarly transmitted to one and the other drive gears 8a and 8b via the pipe 11. Then, one and the other geared ropes 10a,
10b is driven to slide the slider 3 in a direction in which the screen 4 is closed, and one and the other driven gears 9a and 9b are driven to rotate in a direction to unwind the winding roll 5.

The one and other driven gears 9a, 9b
Is transmitted to the winding roll 5 via the coupling shaft 16 and the tension applying means 6, and unwinds the screen 4 wound on the winding roll 5. At this time, since the slider 3 slides to the closing side, the load on the slider 3 at the time of closing can be reduced (see FIG. 7A).

At this time, since the diameter of the winding roll 5 is smaller than the diameters of the driven gears 9a and 9b, the slider 3 pulls the screen 4 more than the winding roll 5 unwinds the screen 4. However, the torsion spring 17 of the tension applying means 6 is twisted to absorb the difference in the amount pulled out.

(Close → Open) When the open switch 13a is turned on, the switch box 13 rotates the electric motor 12 in the opening direction. The rotation output of the electric motor 12 is similarly transmitted to one and the other drive gears 8a and 8b via the pipe 11. Then, the one and the other geared ropes 10a and 10b are driven to slide the slider 3 in a direction in which the screen 4 is opened, and the one and the other driven gears 9a and 9b are rotationally driven in a direction in which the winding roll 5 is wound. Let it.

The one and other driven gears 9a, 9b
Is transmitted to the winding roll 5 via the coupling shaft 16 and the tension applying means 6, and the winding roll 5
Take up. At this time, since the slider 3 slides to the open side, the load on the slider 3 at the time of opening can be reduced (see FIG. 7C).

At this time, since the diameter of the winding roll 5 is smaller than the diameters of the one and the other driven gears 9a and 9b, the slider 3 rotates the screen 4 more than the winding roll 5 winds the screen 4. The amount approaching 5 is greater. Therefore, without the tension applying means 6, the screen 4 is loosened as shown in FIG. However, since the torsion spring 17 of the tension applying means 6 applies tension to the winding roll 5 in the direction of winding the screen, the torsion spring 17 is twisted and the screen 4
Absorb the slack.

[Effects of the Embodiment] As described above, the screen opening and closing device 1 of this embodiment has the slider 3
When the screen slides to open and close the screen 4, the winding roll 5 is also rotationally driven via the tension applying means 6, so that the load on the electric motor 12 for opening and closing the screen 4 can be reduced, and the cost of the electric motor 12 can be reduced. Can be suppressed. Further, since the load applied to the electric motor 12 can be reduced over the entire opening and closing range, the remaining power of the electric motor 12 becomes substantially constant regardless of the opening ratio of the screen 4, and the opening and closing speed of the screen 4 can be made substantially constant.

Also, based on the difference between the diameter of the winding roll 5 and the diameters of the driven gears 9a and 9b, the amount by which the winding roll 5 winds the screen 4 and the amount by which the slider 3 moves the screen 4 are determined. Is generated, the torsion spring 17 of the tension applying means 6 absorbs the difference. For this reason, when opening and closing the screen 4, the screen 4 becomes loose,
No malfunction is caused by stretching. In addition, since the torsion spring 17 rotates almost together with the winding roll 5 and the rotating member 7 and the tension for absorbing looseness and tension is small, the driving load of the slider 3 due to the tension generated by the tension applying means 6 is sufficient. Rise is kept small.

Further, the screen opening and closing device 1 has a small number of components constituting the driving means, and is excellent in assemblability. Further, the tension of the one rope with gear 10a and the other rope with gear 10b for transmitting power is automatically adjusted by the compression spring 14 and the tension spring 15, so that troublesome adjustment is not required. For this reason, it is possible to easily cope with a special size, and it is possible to manufacture in a short number of days. Since the frame 2 is provided separately from the skylight, it can be retrofitted to the skylight.

If the slider 3 cannot move during the operation of the electric motor 12, a large load is applied to the meshing portion between the geared ropes 10a and 10b and the driving gears 8a and 8b. Can prevent tooth jumps between the geared ropes 10a and 10b and the drive gears 8a and 8b, and can eliminate malfunctions caused by tooth jumps.

The geared ropes 10a and 10b are employed, and the pulleys for guiding the ropes are also provided with gears (drive gears 8a and 8a).
8b and the driving gears 9a, 9b), the geared ropes 10a, 10b and the gears (the driving gears 8a, 8b).
b and the drive gears 9a, 9b). Therefore, the slider 3 can be reliably slid, and stable operation can be performed for a long period of time.
Also, since one drive gear 8a and the other drive gear 8b are connected by the pipe 11, one driven gear 9a and the other driven gear 9b are connected by the connecting shaft 16,
One geared rope 10a and the other geared rope 1
0b are driven simultaneously, and as a result, both ends of the slider 3 slide simultaneously. For this reason, no shift occurs when the screen 4 is opened and closed, and high-quality operation can be always performed.

[Modification] In the above-described embodiment, an example in which the electric motor 12 is housed in the pipe 11 is shown. However, the electric motor 12 is fixed to the frame 2 and one and the other are driven by rotation of the output shaft. The gears 8a and 8b may be driven. Also, an example in which the one and the other drive gears 8a and 8b are connected by the pipe 11 has been shown. However, when the electric motor 12 is fixed to the frame 2, the one and the other drive gears 8a and 8b are
b may be combined.

In the above-described embodiment, an example in which the screen 4 is opened and closed electrically by using the electric motor 12 has been described. However, the screen 4 may be opened and closed by manual operation. In the above-described embodiment, the example in which the screen opening / closing device 1 is applied to a skylight has been described.

[Brief description of the drawings]

FIG. 1 is a top sectional view of a screen opening and closing device.

FIG. 2 is a cross-sectional view of the screen opening / closing device.

FIG. 3 is a sectional view taken along a winding roll of the screen opening / closing device.

FIG. 4 is an exploded view of the screen opening / closing device.

FIG. 5 is a view showing a state in which a rope with a gear is engaged.

FIG. 6 is a perspective view of a tension applying unit and a rotating member.

FIG. 7 is an operation explanatory view of the screen opening / closing device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 screen opening and closing device 2 frame 3 slider 4 screen 5 winding roll 6 tension applying means 7 rotating member 8a one driving gear 8b the other driving gear 9a one driven gear 9b the other driven gear 10a one rope with gear 10b the other Geared rope 11 Pipe (coupling member) 13 Switch box (control means) 14 Compression spring 15 Tension spring 16 Coupling shaft 17 Torsion spring

Claims (4)

[Claims] 1. A rectangular frame, a slider slidably provided between one side and the other side of the frame, a driving means for slidably driving the slider, and one edge fixed to the slider. A screen opening / closing device comprising: a flexible screen having a formed film shape; and a winding roll for winding the screen, wherein the winding roll includes a tension applying unit that applies tension in a direction in which the screen is wound. A screen opening / closing device, wherein the screen opening / closing device is connected to a rotating member that is driven to rotate in accordance with sliding of the slider. 2. The screen opening / closing device according to claim 1, wherein the driving means includes one and the other driving gears provided on both sides of the one side, and one and the other driving gears provided on both sides of the other side, respectively. A driven gear; the one drive gear; and a flexible rope with one gear spanned over the one driven gear; and the flexibility spanned over the other drive gear and the other driven gear. The other geared rope; a coupling member that couples the one drive gear and the other drive gear; an electric motor that rotationally drives the one and other drive gears coupled by the coupling member; Control means for stopping the operation of the electric motor when an overcurrent occurs due to an increase in load during operation of the motor, one end of the one geared rope, and the other One end of the geared rope is attached to the slider via a compression spring, and the other end of the one geared rope and the other end of the other geared rope are connected via a tension spring. A screen opening and closing device. 3. The screen opening and closing device according to claim 2, wherein the rotating member includes the one and other driving gears and a coupling shaft that couples the one and the other driven gears. A screen opening / closing device, wherein one end is connected to the connection shaft, and the other end is connected to the winding roll, and is a torsion spring which is assembled under a torsional load. 4. The screen opening / closing device according to claim 2, wherein the geared rope is formed by spirally winding a flexible wire around a flexible core wire and joining it. Characteristic screen opening and closing device.