KR102296902B1 - Electric Roll blind - Google Patents

Abstract

A roll blind according to the present invention includes an upper and lower frame, and a frame having side frames connecting both sides of the upper and lower frames and installed on windows and doors; a driving unit provided inside the upper frame to generate a driving force; a winding roll coupled to the driving unit to rotate according to the operation of the driving unit; a screen selectively blocking sunlight flowing into the windows and doors through the operation of winding or unfolding the winding roll by the operation of the driving unit; a lower bar coupled to the lower end of the screen and guided by a rail groove formed in the side frame; first and second wires respectively connected to both ends of the lower bar and pulling the lower bar downward; and a tension adjusting device installed on the lower frame to adjust the tension generated in the first and second wires,
The tension adjusting device is fixed to rotate on the lower frame and includes a pulley having first and second winding grooves in which the first and second wires are wound, respectively, and the pulley is geared to reduce the rotation speed of the pulley. and a reduction gear, a rack gear coupled to a pinion provided on a rotation shaft of the reduction gear, and a cylinder coupled to an end of the rack gear to adjust tension applied to the first and second wires.

Description

Electric roll blind

The present invention relates to a roll blind, and more particularly, to an electric roll blind capable of maintaining uniform tension on both sides of the screen to prevent distortion of the screen and prevent product failure.

Recently, there are many buildings with a curtain wall structure with a beautiful appearance in commercial buildings and the like. The curtain wall structure has the advantage of having a light weight and a beautiful appearance, but has a disadvantage in that heat loss is high because glass is used a lot. In a building, windows are the most thermally vulnerable part, and in particular, an increase in glass area has a greater impact on building energy consumption.

On the other hand, in order to protect privacy along with a shading effect from the outside, recently, a lot of shading devices are used in windows of offices, homes, or restaurants. In such a awning device, a roll blind or roll screen made of a single fabric awning in the awning, a plurality of plate-shaped slits in aluminum, plastic or wood, are horizontally arranged for the awning, and the Venetian blinds and skylights, slanted windows, There is a fabric tension system, which refers to an applied form of a roll screen applied to a curved window, and the like.

The shading device manually operated among such conventional shading devices includes an upper operating bar that is wound by fastening the upper end of the wire or screen connecting the awning slit, a pulley fastened to one side of the upper operating bar to rotate the upper operating bar, and , is combined with the pulley and consists of a ball chain that rotates the pulley, and when the user manually pulls one of the ball chains, the pulley and the operation bar rotate while winding or unwinding the screen or wire to adjust the lower position of the awning.

However, when manually raising/lowering the screen or awning slit, the user has to pull the ball chain several times, so it is cumbersome. Problems such as a poor fastening state occurred.

In order to solve the problems of the conventional manual shading system and use in the fabric tension system, an electric shading device for elevating / lowering the awning using a motor has recently been developed and commercialized.

However, in the conventional electric shading device, a device for adjusting the tension is inserted into both rails to adjust the tension, but when a failure occurs in one part of the tension adjusting device inserted into the rails on both sides, the screen is tilted to one side and the screen is wrinkled or , when the screen is raised or lowered by the motor in a state where the screen is tilted to one side, there is a problem in that the electric shading device malfunctions.

In addition, the tension control device is mainly provided on both sides of the window frame, there was a problem that the space for the tension control device to be inserted into the frame on both sides of the window is insufficient.

In addition, there is a problem in that it is difficult to additionally install such a tension control device without removing the previously installed roll blind.

Republic of Korea Patent Publication No. 10-1502754 (Announcement on Mar. 16, 2015)

The present invention provides an electric roll blind that has a simple structure and can automatically adjust the tension on both sides of the screen.

In addition, it provides an electric roll blind that has a simple structure and can reduce maintenance costs.

In addition, it provides an electric roll blind that is easy to install not only when a blind is newly installed on a window but also a tension control device to an existing blind installed.

In addition, even if installed on the outdoor side of the building, the screen is firmly fixed to provide an electric roll blind that can withstand wind loads.

In addition, to provide an electric roll blind that can respond to an external environment such as wind when installed outdoors, and can reduce the external awning by reducing the installation cost.

In order to achieve the above object, a roll blind according to an aspect of the present invention includes an upper and lower frame and a frame having side frames connecting both sides of the upper and lower frames and installed on windows and doors; a driving unit provided inside the upper frame to generate a driving force; a winding roll coupled to the driving unit to rotate according to the operation of the driving unit; a screen for selectively blocking sunlight flowing into windows and doors through an operation of winding or unfolding the winding roll by the operation of the driving unit; a lower bar coupled to the lower end of the screen and guided by a rail groove formed in the side frame; first and second wires respectively connected to both ends of the lower bar and pulling the lower bar downward; and a tension adjusting device installed on the lower frame to adjust the tension generated in the first and second wires, the tension adjusting device being fixed to rotate on the lower frame and winding the first and second wires respectively A pulley having 1 and 2 winding grooves, a reduction gear geared to the pulley to reduce a rotation speed of the pulley, a rack gear coupled to a pinion provided on a rotation shaft of the reduction gear, and the rack gear It may include a tension adjusting member coupled to the end to adjust the tension applied to the first and second wires.

In addition, the tension adjusting member may be a cylinder or a compression spring.

In addition, a guide coupled to the end of the lower bar and guided to the rail groove and having an accommodating space therein, an elastic spring accommodated in the accommodating space and elastically supported at the lower end of the guide, and an upper end of the elastic spring It is supported and may further include a screen torsion prevention device having a wire bonding material to which the ends of the first and second wires are respectively coupled.

In addition, first and second guide rollers provided in the lower frame to support the first and second wires to be wound around the first and second winding grooves formed in the pulley may be provided.

In addition, the side frame includes a body coupled to the window and door, and a cover coupled to the body to form the rail groove, wherein the body and the cover are coupled to each other by providing a first coupling part and a second coupling part, , The body and the cover are provided with mohair installation grooves in which mohair is installed, respectively. After the mohair is installed in the body and the cover, when the cover is coupled to the body, the mohair installed in the body and the cover respectively. The end may be in close contact with the screen.

According to the roll blind according to the present invention, the tension between both sides of the screen is automatically adjusted, so that the separation between the screen wound on the take-up roll and the power transmission means can always be maintained in a tight state.

In addition, since the structure of the tension control device is simple, the manufacturing cost of the roll blind can be reduced, and the installation cost and maintenance cost can be reduced.

In addition, even if it is installed on the outdoor side of the building, the screen can be firmly fixed, so it can withstand wind loads.

1 is a perspective view of an electric roll blind according to an embodiment of the present invention.
Figure 2 is a front view of the electric roll blind shown in Figure 1;
Figure 3 is a longitudinal cross-sectional view of the electric roll blind shown in Figure 1;
Figure 4 is a perspective view of the tension control device installed in the electric roll blind shown in Figure 1;
5 is a plan view of the tension control device shown in FIG.
Figure 6 is a front view of the tension control device shown in Figure 4;
7 is an enlarged view of the screen twist prevention device provided in the electric roll blind shown in FIG.
FIG. 8 is a plan cross-sectional view of a side frame provided in the electric roll blind shown in FIG. 1. FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, it goes without saying that the present invention is not limited to these embodiments and may be modified in various forms.

In the drawings, in order to clearly and briefly describe the present invention, the illustration of parts irrelevant to the description is omitted, and the same reference numerals are used for the same or extremely similar parts throughout the specification. In addition, in the drawings, the thickness, the width, etc. are enlarged or reduced in order to make the description more clear, and the thickness, the width, etc. of the present invention are not limited to the bars shown in the drawings.

And, when a certain part "includes" another part throughout the specification, other parts are not excluded unless otherwise stated, and other parts may be further included. Also, when a part of a layer, film, region, plate, etc. is said to be “on” another part, this includes not only the case where the other part is “directly on” but also the case where another part is located in the middle. When a part, such as a layer, film, region, plate, etc., is "directly above" another part, it means that no other part is located in the middle.

Hereinafter, an electric roll blind according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an electric rolled blind according to an embodiment of the present invention, FIG. 2 is a front view of the electric rolled blind shown in FIG. 1, and FIG. 3 is a longitudinal cross-sectional view of the electric rolled blind shown in FIG.

1 to 3, the electric roll blind according to an embodiment of the present invention is provided with a frame (1) coupled to the window or curtain wall.

The frame 1 includes upper and lower frames 10 and 20 and side frames 30 connecting both sides of the upper and lower frames 10 and 20 .

As described above, the electric roll blinds are formed in the form of a frame, so that they can be installed simply because they are manufactured in a factory and only need to be coupled to an existing window or curtain wall.

The frame 1 includes a driving unit 110 provided inside the upper frame 10 to generate a driving force; a winding roll 120 coupled to the driving unit 110 and rotating according to the operation of the driving unit 110; a screen 130 for selectively blocking sunlight flowing into windows and doors through an operation of being wound or unfolded on the winding roll 120 by the operation of the driving unit 110; a lower bar (140) coupled to the lower end of the screen (130) and guided by a rail groove (30a) formed in the side frame (30); first and second wires 151 and 152 respectively connected to both ends of the lower bar 140 to pull the lower bar 140 downward; A tension adjusting device 200 is installed on the lower frame 20 to adjust the tension generated in the first and second wires 151 and 152 .

The driving unit 110 may be formed of a motor or the like that generates a driving force, and a switch 111 for rotating the driving unit 110 forward and reverse may be provided on a part of the side frame 30 of the frame 1 .

The winding roll 120 is coupled to the driving unit 110 to rotate forward and reverse by the power generated by the driving unit 110 . When the winding roll 120 is coupled to the end of the screen 130 and the winding roll 120 rotates, the screen 130 is wound or unwound to rise or fall.

On the other hand, the first and second direction change rollers 161 and 162 are provided to guide the first and second wires 151 and 152 connected to the lower bar 140 to be connected to the tension adjusting device 200 .

First and second wires 151 and 152 are respectively coupled to both ends of the lower bar 140 to keep the screen 130 flat, and the first and second direction changing rollers 161 and 162 are at both ends of the lower bar 140 While supporting the connected first and second wires 151 and 152 , the first and second wires 151 and 152 change the moving direction to guide the connection to the tension adjusting device 200 .

When the screen 130 is wound on the winding roll 120 , the speed at which the screen 130 is wound on the winding roll 120 increases gradually because of the thickness of the screen 130 wound on the winding roll 120 .

As such, since the speed at which the screen 130 is wound or unwound from the winding roll 120 is not constant, a tension adjusting device 200 is required to keep the screen 130 flat.

The tension control device 200 serves to keep the screen 130 flat when the screen 130 is wound or unwound on the winding roll 120 . The tension adjusting device 200 according to the present embodiment can be installed without increasing the thickness of the side frame 30 by being installed on the lower frame 20 .

Hereinafter, the tension adjusting device 200 for adjusting the tension applied to the first and second wires 151 and 152 to keep the screen 130 flat will be described in more detail.

4 is a perspective view of the tension control device installed in the electric roll blind shown in FIG. 1, FIG. 5 is a plan view of the tension control device shown in FIG. 4, and FIG. 6 is a front view of the tension control device shown in FIG. .

4 to 6 , the tension adjusting device 200 installed in the electric roll blind according to an embodiment of the present invention is fixed to rotate on the lower frame 20 and the first and second wires 151 and 152 are A pulley 210 having first and second winding grooves 210a and 210b to be wound, respectively, and a reduction gear 220 geared to the pulley 210 to reduce the rotational speed of the pulley 210 and , the rack gear 230 coupled to the pinion 223 provided on the rotation shaft 221 of the reduction gear 220, and the first and second wires 151 and 152 coupled to the end of the rack gear 230. It includes a tension adjusting member 240 for adjusting the applied tension.

The pulley 210 includes a first winding groove 210a in which the first wire 151 is wound, and a second winding groove 210b in which the second wire 152 is wound.

On the other hand, the first and second wires 151 and 152 whose direction is changed by the first and second direction changing rollers 161 and 162 are wound on the first and second winding grooves 210a and 210b formed in the pulley 210, respectively. The frame 30 is provided with first and second guide rollers 171 and 172 .

The first and second guide rollers 171 and 172 are first and second winding grooves 210a and 210b in which the first and second wires 151 and 152 whose direction is changed by the first and second direction change rollers 161 and 162 are formed in the pulley 210 . ) to guide the insertion.

Meanwhile, the first and second wires 151 and 152 are wound around the first and second winding grooves 210a and 210b formed in the pulley 210 in the same rotational direction. For example, when the pulley 210 rotates to one side, the 1 and 2 wires 151 and 152 are wound around the pulley 210, and when the pulley 210 rotates to the other side, the 1 and 2 wires 151 and 152 are the pulleys ( 210) will be released.

Meanwhile, since the first and second wires 151 and 152 are formed of a material having rigidity, the pulley 210 for winding the first and second wires 151 and 152 is preferably made of metal or engineering plastic.

Meanwhile, a reduction gear 220 is coupled to the pulley 210 to reduce the rotational speed of the pulley 210 .

Accordingly, the pulley 210 is prevented from being suddenly unwound or wound, and the tension applied to the 1 and 2 wires 151 and 152 can be appropriately adjusted.

In order to gear-couple the pulley 210 with the reduction gear 220 , a first gear 212 is provided on the upper end of the rotation shaft 211 of the pulley 210 , and the first gear 212 is provided on the upper end of the rotation shaft 221 of the reduction gear 220 . A second gear 222 geared to the first gear 212 is provided. At this time, the rotational speed of the first gear 212 and the second gear 222 is changed according to the gear ratio of the first gear 212 and the second gear 222 . In this embodiment, since the diameter of the first gear 212 is small and the diameter of the second gear 222 is formed large, even if the first gear 212 rotates at a high speed, the second gear 222 is rotates at a slow speed.

Meanwhile, the upper end of the rotating shaft 211 of the pulley 210 and the upper end of the rotating shaft 221 of the reduction gear 220 may be supported by the support plate 250 to rotate.

On the other hand, a pinion 223 is provided under the rotation shaft 221 of the reduction gear 220 . The pinion 223 is gear-coupled to the rack gear 230 . Accordingly, as the pinion 223 provided in the reduction gear 220 rotates, the rack gear 230 performs a linear reciprocating motion.

Meanwhile, a tension adjusting member 240 is coupled to an end of the rack gear 230 . In this embodiment, it was shown that the tension adjusting member 240 is formed of a cylinder having pneumatic pressure, but as long as the tension adjusting member 240 can adjust the tension, a compression spring or the like may be used in addition to the cylinder.

The cylinder 240 includes a rod 241 introduced into the cylinder 240 by pneumatic pressure, and the rod 241 of the cylinder 240 is coupled to an end of the rack gear 240 .

With this structure, the tension applied to the first and second wires 151 and 152 and the pneumatic pressure of the cylinder 240 are adjusted to balance each other.

For example, when the user operates the switch 111 to raise the screen 130 , the driving unit 110 rotates the winding roll 120 in a direction in which the screen 130 is wound. Accordingly, the lower bar 140 provided at the lower end of the screen 130 also rises. Accordingly, the first and second wires 151 and 152 connected to both ends of the lower bar 140 also rise. As the first and second wires 151 and 152 rise, the first and second wires 151 and 152 wound around the first and second winding grooves 210a and 210b formed in the pulley 210 are unwound.

On the other hand, when the pulley 210 rotates in a direction in which the first and second wires 151 and 152 wound around the pulley 210 are unwound, the rack gear 230 inserts the rod 241 into the cylinder 240 in the direction of inserting it. Since it moves, the tension applied to the first and second wires 151 and 152 by the pneumatic pressure inside the cylinder 240 and the pneumatic pressure of the cylinder 240 are balanced with each other.

Conversely, when the user operates the switch 111 to lower the screen 130 , the driving unit 110 rotates the winding roll 120 in a direction in which the screen 130 is unwound. Accordingly, the lower bar 140 provided at the lower end of the screen 130 is also lowered. Accordingly, the first and second wires 151 and 152 connected to both ends of the lower bar 140 also descend. As the first and second wires 151 and 152 descend, the first and second wires 151 and 152 are further wound in the first and second winding grooves 210a and 210b formed in the pulley 210 .

On the other hand, when the pulley 210 rotates in the direction in which the first and second wires 151 and 152 wound around the pulley 210 are wound, the rack gear 230 causes the rod 241 to fall out of the cylinder 240 . and the tension applied to the first and second wires 151 and 152 by the pneumatic pressure inside the cylinder 240 and the pneumatic pressure of the cylinder 240 are balanced with each other.

As such, the electric roll blind according to an embodiment of the present invention can always keep the screen 130 wound on the winding roll 120 flat by providing the tension control device 200 .

On the other hand, when the screen 130 is wound on the winding roll 120, it is difficult to completely control the tension applied to the first and second wires 151 and 152 to be the same. As such, when the tensions applied to the first and second wires 151 and 152 are different from each other, both sides of the lower bar 140 coupled to the lower end of the screen 130 may not be horizontal. As such, when the driving unit 110 continues to operate in a state where the lower bar 140 is not horizontal, a failure may occur in the electric roll blind.

In order to prevent this, the electric roll blind according to an embodiment of the present invention further includes a screen twist prevention device 300 .

7 is an enlarged view of the screen twist prevention device provided in the electric roll blind shown in FIG. 1 .

Referring to FIG. 7 , the screen torsion prevention device 300 of the electric roll blind according to an embodiment of the present invention is coupled to the end of the lower bar 140 and in the rail groove 30a formed in the side frame 30 . A guide 310 that is guided and has an accommodation space 311 formed therein, an elastic spring 320 accommodated in the accommodation space 311 and elastically supported at the lower end of the guide 310, and the elastic spring 320 ) is supported on the upper end and provided with a wire bonding material 330 to which the ends of the first and second wires 151 and 152 are respectively coupled.

For example, when the tension applied to the first wire 151 is greater than the tension applied to the second wire 152, the height of the lower bar 140 to which the end of the first wire 151 is coupled is lowered, and the second wire The height of the lower bar 140 to which the end of the 152 is coupled may be high, and this can be prevented by the screen twist preventing device 300 .

In the above case, the wire bonding material 330 coupled to the first wire 151 moves in the direction of compressing the elastic spring 320 , and the tension applied to the first wire 151 and the elastic spring 320 . The compression forces stop at the point where they are in equilibrium with each other.

On the other hand, in the case of the wire bonding material 330 coupled to the second wire 152, it moves less than the wire bonding material 330 coupled to the first wire 151 in the direction of compressing the elastic spring 320, so the lower end The bar 140 can be automatically maintained horizontally.

On the other hand, the electric roll blind according to an embodiment of the present invention may have a structure in which the screen 130 and the lower bar 140 can be easily separated when a failure occurs.

FIG. 8 is a plan cross-sectional view of a side frame provided in the electric roll blind shown in FIG. 1 .

Referring to FIG. 8 , the side frame 30 includes a body 31 coupled to the window and door, and a cover 32 coupled to the body 31 to form the rail groove 30a.

Meanwhile, the body 31 and the cover 32 are coupled to each other by providing a first coupling part 33 and a second coupling part 34 . At this time, the first coupling part 33 may be formed in a groove and a protrusion structure, and the second coupling part 34 may be formed by passing a fastening member such as a screw through the cover 32 and then coupling it to the body 31 . can As described above, since the first coupling part 33 and the second coupling part 34 are coupled by the two coupling parts, the cover 32 is stable to the body 31 when the cover 32 is coupled to the body 31 . can be supported by

In addition, since the cover 32 can be easily coupled or separated from the body 31 , the electric roll blind can be repaired by easily removing the screen 130 and the lower bar 140 when a failure occurs.

On the other hand, the body 31 and the cover 32 are provided with mohair installation grooves 31a and 32a in which the mohair 35 is installed, respectively. Therefore, after installing the mohair 35 on the body 31 and the cover 32, respectively, when the cover 32 is coupled to the body 31, the mohair 35 installed on the body 31 and the cover 32, respectively. Since the end of the screen 130 is in close contact, it is possible to prevent pests and dust from entering the gap formed between the body 31 and the cover 32 .

In the above, the electric roll blind according to an embodiment of the present invention has been described. However, the features, structures, effects, etc. as described above are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by a person skilled in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

1: frame 110: driving unit
120: winding roll 130: screen
140: lower bar 151, 152: first, second wire
200: tension control device 210: pulley
220: reduction gear 230: rack gear
240: tension control member

Claims (5)

a frame having upper and lower frames and side frames connecting both sides of the upper and lower frames and installed on windows and doors;
a driving unit provided inside the upper frame to generate a driving force;
a winding roll coupled to the driving unit to rotate according to the operation of the driving unit;
a screen for selectively blocking sunlight flowing into windows and doors through an operation of winding or unfolding the winding roll by the operation of the driving unit;
a lower bar coupled to the lower end of the screen and guided by a rail groove formed in the side frame;
first and second wires respectively connected to both ends of the lower bar and pulling the lower bar downward;
a guide coupled to the end of the lower bar and guided to the rail groove, the guide having an accommodating space therein;
An elastic spring accommodated in the receiving space and elastically supported at the lower end of the guide;
A screen torsion preventing device supported on the upper end of the elastic spring and having a wire bonding material to which ends of the first and second wires are coupled, respectively;
and a tension adjusting device installed on the lower frame to adjust the tension generated in the first and second wires,
The tension adjusting device is fixed to rotate on the lower frame and includes a pulley having first and second winding grooves in which the first and second wires are wound, respectively, and gear-coupled with the pulley to reduce the rotation speed of the pulley. A reduction gear, a rack gear coupled to a pinion provided on a rotation shaft of the reduction gear, and a tension adjusting member coupled to an end of the rack gear to adjust the tension applied to the first and second wires. Electric roll blinds. The method of claim 1,
The tension control member is an electric roll blind, characterized in that a cylinder or a compression spring. delete The method of claim 1,
Electric roll blinds, characterized in that provided in the lower frame, the first wire and the second wire, characterized in that the first and second guide rollers are provided to support the winding in the first and second winding grooves formed in the pulley. The method of claim 1,
The side frame includes a body coupled to the window and door, and a cover coupled to the body to form the rail groove,
The body and the cover are coupled to each other by having a first coupling part and a second coupling part,
The body and the cover are provided with mohair installation grooves in which mohair is installed, respectively. After the mohair is installed in the body and the cover, when the cover is coupled to the body, the ends of the mohair installed in the body and the cover, respectively is an electric roll blind, characterized in that in close contact with the screen.

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