KR20200143932A - Electric Roll blind - Google Patents

Abstract

The present invention provides an electrically-driven roll blind capable of automatically adjusting the tension of both sides of a screen. According to the present invention, the roll blind comprises: a frame provided with an upper and a lower frame and a side frame connecting both sides of the upper and lower frames, and installed on a window; a driving unit provided in the upper frame to generate driving power; a winding roll coupled to the driving unit to rotate in accordance with an operation of the driving unit; a screen to selectively block sunlight entering the window by an operation of unrolling or rolling on the winding roll by an operation of the driving unit; a lower end bar coupled to the lower end of the screen and guided by a rail groove formed on the side frame; a first and a second wire connected to both ends of the lower end bar to pull the lower end bar downward; and a tension adjustment device. The tension adjustment device includes: a pulley fixed on the lower frame to rotate, and provided with a first and a second winding groove on which the first and second wires are wound thereon, respectively; a reduction gear gear-coupled to the pulley to reduce the rotating speed of the pulley; a rack gear coupled to a pinion provided on a rotary shaft of the reduction gear; and a cylinder coupled to an end of the rack gear to adjust the 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 uniformly maintaining the tension on both sides of the screen to prevent distortion of the screen and to prevent product failure.

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

On the other hand, in order to protect privacy as well as a light shielding effect from the outside, in recent years, many awning devices are used for windows of offices, homes, or restaurants. In such a awning device, a roll blind or roll screen in which the awning part is made of a single fabric awning, and a plurality of plate-shaped slits made of aluminum, plastic or wood in the awning part are arranged horizontally and connected to each other by wires, and venetian blinds, skylights, inclined windows, There is a fabric tension system, which refers to an applied form of a roll screen applied to curved windows.

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

However, when manually raising/lowering the screen or awning slit, the user has to pull the ball chain several times, so it is cumbersome, and in the process of pulling, the pulling force and the load of the screen or awning slit are applied to the bracket attaching the blind. Problems such as poor fastening occurred.

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

However, in the conventional electric sunshade device, a device that adjusts tension is inserted into both rails to adjust the tension, but if a failure occurs in one of the tension control devices inserted into both rails, the screen tilts to one side, causing wrinkles or , When the screen is raised or lowered by a motor while the screen is tilted to one side, there is a problem in that a failure occurs in the electric shading device.

In addition, there is a problem that the tension control device is mainly provided on both sides of the window frame, and the space for inserting the tension control device 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 existing roll blind.

Korean Registered Patent Publication No. 10-1502754 (announced on March 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 a tension control device on an existing blind as well as when a blind is newly installed on the window.

In addition, even if it is installed on the outdoor side of a building, it provides an electric roll blind that can withstand wind loads by firmly fixing the screen.

In addition, when installed outdoors, it responds to the external environment such as wind, and provides an electric roll blind that can reduce the external shade by reducing the installation cost.

In order to achieve the above object, the roll blind according to an aspect of the present invention includes an upper and lower frame, and a frame provided on a window and having a side frame connecting both sides of the upper and lower frame; A driving unit provided inside the upper frame to generate a driving force; A winding roll coupled to the driving unit and rotating according to the operation of the driving unit; A screen selectively blocking sunlight flowing into the window through an operation of winding or unfolding the winding roll by the operation of the driving unit; A lower bar coupled to a 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 to pull the lower bar downward; A tension control device installed on the lower frame to control tension generated in the first and second wires, wherein the tension control device is fixed to rotate on the lower frame, and the first and second wires are wound respectively. A pulley having 1 and 2 winding grooves, a reduction gear coupled with the pulley to reduce the speed at which the pulley rotates, a rack gear coupled with a pinion provided on a rotation shaft of the reduction gear, and the rack gear It is coupled to the end may include a tension control member for adjusting the tension applied to the first and second wires.

In addition, the tension control 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 a receiving space formed therein, an elastic spring accommodated in the receiving 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 twist 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 may be provided in the lower frame to support the first wire and the second wire to be wound in the first and second winding grooves formed in the pulley.

In addition, the side frame has a body coupled to the window and a cover coupled to the body to form the rail groove, and the body and the cover are coupled to each other by having a first coupling portion and a second coupling portion. , The body and the cover are each provided with a mohair installation groove in which a mohair is installed, and after the mohair is installed on the body and the cover, when the cover is coupled to the body, the mohair installed on the body and the cover The end may be in close contact with the screen.

According to the roll blind according to the present invention, the tension on both sides of the screen is automatically adjusted so that the distance between the screen wound on the winding roll and the power transmission means can always be kept in a taut 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 outside of a 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 a tension control device installed in the electric roll blind shown in Figure 1;
Figure 5 is a plan view of the tension control device shown in Figure 4;
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.
8 is a plan cross-sectional view of a side frame provided in the electric roll blind shown in FIG. 1.

Hereinafter, exemplary embodiments 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, portions not related to the description are omitted, and the same reference numerals are used for identical or extremely similar portions throughout the specification. In addition, in the drawings, the thickness and width are enlarged or reduced in order to clarify the description. However, the thickness and width of the present invention are not limited to those shown in the drawings.

In addition, when a certain part "includes" another part throughout the specification, the other part is not excluded, and other parts may be further included unless specifically stated to the contrary. In addition, when a part such as 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 above", but also the case where the other part is located in the middle. When a part such as a layer, a film, a region, or a plate is "directly over" 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 roll blind according to an embodiment of the present invention, FIG. 2 is a front view of the electric roll blind shown in FIG. 1, and FIG. 3 is a longitudinal section of the electric roll blind shown in FIG. 1.

1 to 3, an electric roll blind according to an embodiment of the present invention includes a frame 1 coupled to a window or a 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 such, the electric roll blinds are formed in a frame shape, so they can be installed simply because they only need to be combined with existing windows or curtain walls after being manufactured at the factory.

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 selectively blocking sunlight flowing into the window through an operation of winding or unfolding 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 control device 200 is provided 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 that generates a driving force, and a switch 111 for rotating the driving unit 110 forward and backward may be provided in some of the side frames 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. The end of the screen 130 is coupled to the take-up roll 120 so that when the take-up roll 120 rotates, the screen 130 rises or descends while being wound or unwound.

Meanwhile, first and second direction changing 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 control 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. The first and second wires 151 and 152 are supported, and the direction in which the first and second wires 151 and 152 move is changed to guide the connection to the tension control device 200.

When the screen 130 is wound on the take-up roll 120, the speed at which the screen 130 is wound on the take-up roll 120 increases gradually due to the thickness of the screen 130 wound on the take-up roll 120.

In this way, since the speed at which the screen 130 is wound or unwound by the winding roll 120 is not constant, a tension control 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 control device 200 according to the present embodiment may 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.

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

4 to 6, the tension control device 200 installed on 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, respectively, and a reduction gear 220 that is gear-coupled with the pulley 210 to reduce the speed at which the pulley 210 rotates, , The rack gear 230 coupled to the pinion 223 provided on the rotation shaft 221 of the reduction gear 220, and coupled to the end of the rack gear 230 to the first and second wires (151,152) It includes a tension control member 240 for adjusting the tension applied.

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, 152) changed in direction by the first and second direction changing rollers (161, 162) are respectively wound in the first and second winding grooves (210a, 210b) formed in the pulley (210). 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 formed in the pulley 210 in which the first and second wires 151 and 152 changed in direction by the first and second direction changing rollers 161 and 162 are formed. It serves to guide the insertion into ).

On the other hand, the 1st and 2nd wires 151 and 152 are wound in the same rotation direction in the 1st and 2nd winding grooves 210a and 210b formed in the pulley 210. 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 is rotated to the other side, the 1 and 2 wires 151 and 152 are pulleys ( 210).

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 formed of metal or engineering plastic.

Meanwhile, a reduction gear 220 is coupled to the pulley 210 to reduce the speed at which the pulley 210 rotates.

Accordingly, it is possible to prevent the pulley 210 from being rapidly unwound or wound, and to properly adjust the tension applied to the 1 and 2 wires 151 and 152.

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

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

Meanwhile, a pinion 223 is provided under the rotation shaft 221 of the reduction gear 220. This pinion 223 is geared with the rack gear 230. Accordingly, as the pinion 223 provided in the reduction gear 220 performs a rotational motion, the rack gear 230 performs a linear reciprocating motion.

On the other hand, the tension adjusting member 240 is coupled to the end of the rack gear 230. In the present embodiment, it was shown that the tension adjusting member 240 is formed of a cylinder having pneumatic pressure, but if the tension adjusting member 240 is capable of adjusting the tension, a compression spring or the like may be used in addition to the cylinder.

The cylinder 240 is provided with a rod 241 introduced into the cylinder 240 by pneumatic pressure, and the rod 241 of the cylinder 240 is coupled to the 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 so that the screen 130 rises, the driving unit 110 rotates the winding roll 120 in the 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 the direction in which the first and second wires 151 and 152 wound around the pulley 210 are unwound, the rack gear 230 is in a direction in which the rod 241 is inserted into the cylinder 240. Since it is moved, 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.

On the contrary, when the user operates the switch 111 so that the screen 130 descends, the driving unit 110 rotates the winding roll 120 in the 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 are also lowered. 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 moves the rod 241 to the outside of the cylinder 240 And the tension applied to the first and second wires 151 and 152 by the air pressure inside the cylinder 240 and the air pressure of the cylinder 240 are balanced with each other.

As described above, since the electric roll blind according to an embodiment of the present invention includes the tension control device 200, the screen 130 wound around the winding roll 120 can always be kept flat.

On the other hand, when the screen 130 is wound around the winding roll 120, it is difficult to control the tension applied to the first and second wires 151 and 152 completely equally. In this way, when the tension 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 aligned. As described above, if the driving unit 110 continues to operate in a state where the lower bar 140 is not horizontally aligned, 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 torsion preventing device 300.

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

Referring to FIG. 7, the screen twist 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 is in the rail groove 30a formed in the side frame 30. Guide 310 is guided and has a receiving space 311 formed therein, an elastic spring 320 accommodated in the receiving 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 includes a wire bonding material 330 to which ends of the first and second wires 151 and 152 are respectively coupled.

For example, if 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 becomes low, and the second wire The height of the lower bar 140 to which the ends of the 152 are coupled may be increased, and this may be prevented by the screen twist prevention device 300.

In the above case, the wire bonding material 330 coupled with 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 It stops at the point where the compressive forces balance each other.

On the other hand, in the case of the wire binder 330 coupled with the second wire 152, it moves less than the wire binder 330 coupled with the first wire 151 in the direction of compressing the elastic spring 320 The bar 140 can be automatically leveled.

Meanwhile, 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.

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 a window 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 having a first coupling portion 33 and a second coupling portion 34. At this time, the first coupling portion 33 may be formed in a groove and a protrusion structure, and the second coupling portion 34 is formed by passing a fastening member such as a screw through the cover 32 and then coupling it to the body 31. I can. In this way, the first coupling portion 33 and the second coupling portion 34 are coupled by the two coupling portions, so when the cover 32 is coupled to the body 31, the cover 32 is stable 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 is in close contact with the screen 130, it is possible to prevent the introduction of pests and dust into the gap formed between the body 31 and the cover 32.

It has been described above for the electric roll blind according to an embodiment of the present invention. 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. Further, the features, structures, effects, etc. illustrated in each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Accordingly, contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

1: frame 110: drive
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 provided on a window and having a side frame connecting both sides of the upper and lower frames and the upper and lower frames;
A driving unit provided inside the upper frame to generate a driving force;
A winding roll coupled to the driving unit and rotating according to the operation of the driving unit;
A screen selectively blocking sunlight flowing into the window through an operation of winding or unfolding the winding roll by the operation of the driving unit;
A lower bar coupled to a 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 to pull the lower bar downward;
It is provided on the lower frame and includes a tension control device for adjusting the tension generated in the first and second wires,
The tension control device
A pulley fixed to rotate on the lower frame and having first and second winding grooves in which the first and second wires are wound, respectively,
A reduction gear coupled with the pulley to reduce the speed at which the pulley rotates,
A rack gear coupled with a pinion provided on a rotation shaft of the reduction gear,
Electric roll blind, characterized in that it comprises a tension control member coupled to the end of the rack gear to adjust the tension applied to the first and second wires. The method of claim 1,
The tension control member is an electric roll blind, characterized in that the cylinder or compression spring. The method of claim 1,
A guide coupled to the end of the lower bar and guided to the rail groove and having a receiving space therein,
An elastic spring accommodated in the receiving space and elastically supported at the lower end of the guide,
An electric roll blind, further comprising a screen torsion preventing device supported on an upper end of the elastic spring and having a wire binding material to which ends of the first and second wires are respectively coupled. The method of claim 1,
Electric roll blind, characterized in that it is provided in the lower frame and provided with first and second guide rollers for supporting the first wire and the second wire to be wound 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 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 portion and a second coupling portion,
The body and the cover are each provided with a mohair installation groove in which a mohair is installed, and after the mohair is installed on the body and the cover, when the cover is coupled to the body, the end of the mohair respectively installed on the body and the cover The electric roll blind, characterized in that in close contact with the screen.

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