KR101440248B1 - Device for Adjusting Winding Speed in Roller-Type Screen - Google Patents

Abstract

The present invention relates to an apparatus for controlling the winding speed of a screen by applying to a roller type screen (2) at which a winding roller (4) winding a screen (6) up to a housing (3) by an elastic force of a spring (5) is installed. The apparatus for controlling a winding speed (1) includes a housing cover (10) connected to one side of the housing (3) and having a rotary shaft (11) supporting the winding roller (4) to be in an idle state; a friction drum (20) including a friction container portion (21) inserted into the rotary shaft (11) and having a cut portion (21a) formed at one side, to be stably and elastically opened when an external force is applied, and an opened plate portion (22) formed at one side of the friction container portion (21) to be in contact with the housing cover (10) and having an opened gap (22a) continuously formed at the cut portion (21a); a fixing member (30) formed at the housing cover (10) and applied to one side (22b) of the opened gap (22a) to limit the rotation of the friction drum (20); a controlling screw (40) installed at the housing cover (10) to be applied to the other side (22c) of the opened gap (22a) and controlling the degree of opening of the opened gap (22a) according to the degree of fastening of the screw to control the degree of opening of the friction container portion (21); and a roller drum (50) connected to one end of the winding roller (4) to integrally rotate with the winding roller (4), fitted to a circumference of the friction container portion (21) to be in an idle state, and being in frictional contact with an outer circumferential surface of the friction container portion (21).

Description

Device for Adjusting Winding Speed in Roller-Type Screen [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller type screen, and more particularly, to a winding speed adjusting device for appropriately adjusting the winding speed of a screen on a roller type screen that rolls a screen by using the elastic force of a spring.

As a screen (for example, an insect control net) installed on various doors such as a door or a window, there is a fixed type which is completely fixed to a door and an opening and closing type which allows a screen to be walked when necessary.

Examples of the retractable screen include a retracting roller having a spring mounted in the housing, a screen (net) wound on the retracting roller by the elastic force of the spring and pulled by the retracting roller by a force, a guide for guiding the screen to be opened / And a locking device that keeps the screen closed. There is a "roller insect screen" which is openably and closably mounted on a door or a window. Such a roller insect screen is used only when it is necessary to prevent penetration of insect pests Screen), and when not in use, the screen can be rolled up and rolled up.

In the case of such a roller type screen, if the elastic force of the spring is weakly set, the screen may not be completely wound and may stop at the middle. On the contrary, if the elastic force of the spring is set strong, There is a problem that noise may be generated due to collision with the housing, and parts may be damaged due to a collision impact. Such a problem is not easily solved by simply adjusting the elastic force of the spring.

As a countermeasure for solving the above problems, there have been proposed a number of proposals for reducing the winding speed of the screen by providing a reduction device on the winding roller to make the operation smooth and flexible. A decelerator for controlling the winding speed of a rotary roll, a decelerator for a roll screen of Korean Registered Patent No. 445300, and a roll screen decelerator for a registered Korean Utility Model No. 373362.

The present inventor proposed a decelerating device of a roller type screen using a resistance of oil of a Korean Utility Model No. 0417447 of Korea and a Korean Patent No. 10-1005257 using a frictional resistance of a spring.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roller type screen (e.g., insect control net) for winding a screen (net) by rotating a take-up roller with an elastic force of a spring so as to apply a braking force to the take- To thereby control the winding speed of the roller-type screen so that the winding operation of the screen is made softer and more flexible.

The winding speed adjusting device of the roller type screen according to the present invention is a winding speed adjusting device applied to a roller type screen provided with a winding roller for winding up a screen by an elastic force of a spring to a housing.

The winding speed adjusting device of the present invention includes a housing cover, a friction drum, a fixture, an adjusting screw, and a roller drum.

The housing cover has a rotation shaft coupled to one side of the housing and supporting the take-up roller idly.

The friction drum includes a frictional portion and a baffle plate portion. The friction barrel is inserted into the rotary shaft and has a cut-out portion formed at one side thereof so that the friction bar is resiliently deformed when the external force acts. The opening plate portion is formed on one side of the friction tube portion so as to be in contact with the housing cover, and a continuous gap is formed in the incision portion.

The fixture is formed on the housing cover and acts on one side of the opening to limit the rotation of the friction drum.

The adjusting screw is provided on the housing cover to act on the side of the opening, and adjusts the opening degree of the frictional tube by adjusting the degree of opening of the opening according to the degree of tightening.

The roller drum is coupled to one end of the take-up roller and rotates integrally with the take-up roller, and is idly fitted around the friction tube, and the inner circumferential surface of the roller drum is in frictional contact with the outer circumferential surface of the frictional sleeve.

Preferably, the winding speed adjusting device of the present invention further comprises a buffer drum mediated between the friction tube and the roller drum. Wherein the buffer drum is idly fitted around the friction barrel so that the inner circumferential surface of the buffer drum is in frictional contact with the outer circumferential surface of the frictional sleeve and the roller drum is fitted around the buffer drum, And is fitted around the buffer drum to rotate integrally with the buffer drum.

Preferably, a first locking protrusion is formed on the inner circumferential surface of the roller drum 50, a second locking protrusion engaged with the first locking protrusion is formed on the outer circumferential surface of the buffering drum, and the second locking protrusion The roller drum idles with respect to the buffer drum only until it is caught, and thereafter, the roller drum and the buffer drum rotate integrally.

Preferably, a cutout portion is formed in the opening plate portion.

The winding speed adjusting device of the roller type screen according to the present invention has an effect of moderately adjusting the winding speed of the screen by simply tightening and loosening the adjusting screw while checking the state of the screen being opened and closed.

The winding speed adjusting device according to the present invention is characterized in that as the buffer drum operates mediatingly between the friction drum of the friction drum and the roller drum, the incompleteness of the screen opening due to the relatively strong initial frictional force of the friction drum Can be solved.

1 is a schematic view of an exemplary roller-type screen screen to which a winding speed adjusting device according to the present invention is applied;
2 is an exploded perspective view of an exemplary winding speed adjusting device according to the present invention,
3 is a partially assembled exploded perspective view of an exemplary winding speed regulating device according to the present invention,
4 is a partial side view of an exemplary winding speed adjusting device according to the present invention,
5 is a longitudinal sectional view of an exemplary winding speed adjusting device according to the present invention,
6 is an operation diagram showing the adjustment operation of the frictional force by the adjusting screw,
7 is an operational view showing the operation of the buffer drum;
8 is a longitudinal sectional view of another exemplary winding speed adjusting device according to the present invention,

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a winding speed adjusting device of a roller type screen according to the present invention will be described in detail with reference to the accompanying drawings. The following specific examples are intended to illustrate the present invention without limiting the scope thereof.

The winding speed adjusting device according to the present invention is applied to various roller-type screens equipped with a winding roller for winding a screen (net) by elastic force of a spring on a housing, thereby regulating the winding speed of the winding roller.

1 to 3, the roller-type screen to which the winding speed adjusting device 1 of the present invention is applied includes a housing 3, a take-up roller (not shown) rotatably mounted in the housing 3 A spring 5 inserted into the winding roller 4 to provide an elastic force to the winding roller 4 and a screen 6 wound around the winding roller 4 and the housing 3 are mounted on the door or the like A guide 7 for guiding the up and down movement of the screen 6 and an opening and closing frame 8 mounted on the lower end of the screen 6 to keep the screen 6 flat and parallel, And a locking device 9 for keeping the screen 6 closed.

The locking device 9 has been developed in a wide variety of ways. For example, there is a device which is automatically locked when the locking device 9 is depressed to the bottom by pressing the locking device 9 and is opened once again by the locking device 9 .

1 to 8, the winding speed adjusting device 1 according to the present invention includes a housing cover 10, a friction drum 20, a fixture 30, an adjusting screw 40, and a roller drum (not shown) 50), and preferably further comprises a buffer drum 60.

The housing cover 10 is a conventional cover to which the springs 5 are not coupled in a cover which is coupled to both sides of the housing 3 on the roller type screen 2 and in which the winding roller 4 is idling A rotary shaft 11 is formed to protrude. When the winding speed adjusting device 1 of the present invention is not applied, the winding roller 4 is directly inserted around the rotating shaft 11 and idles.

The friction drum 20 is a drum member in which a frictional sleeve portion 21 and a release plate portion 22 are integrally formed.

The frictional cylindrical portion 21 is a cylindrical portion inserted into the rotary shaft 11 of the housing cover 10. The frictional cylindrical portion 21 is not a complete cylinder but a cutout 21a formed at one side thereof, It is a barrel that flares up in a resilient manner.

When the frictional barrel portion 22 is formed on one side of the frictional barrel 21 (right side in Fig. 2) and the frictional barrel portion 21 is inserted into the rotary shaft 11, . In the illustrated embodiment, a circular mounting recess 12 is formed on the inner surface of the housing cover 10 so that the protruding plate portion 22 is naturally inserted into the mounting recess 12.

The fulcrum plate portion 22 is not a complete donut-shaped plate, but a plate having a spreading gap 22a formed continuously to the cut portion 21a.

The fixture 30 is formed on the inner surface of the housing cover 10 and prevents the rotation of the friction drum 20 by acting on one side 22b of both sides 22b and 22c of the gap 22a.

The adjusting screw 40 is provided on the housing cover 10 and has an end acting on the second side 22c of the opening gap 22a. In the illustrated embodiment, the adjusting screw 40 is attached to the housing cover 10 by forming the mounting groove 13 in the housing cover 10 and inserting the adjusting screw 40 into the mounting groove 13.

Therefore, if the adjusting screw 40 is rotated by a tool such as a screwdriver to vary the degree of tightening (screwing depth), the degree of opening of the opening gap 22a is adjusted according to the screwing depth, The degree of opening of the opening is adjusted.

6, when the adjustment screw 40 is tightened so as to open the other side 22b of the expansion gap 22a with the fixture 30, The frictional tubular portion 21 cut by the cutout portion 21a is also pressed against the rotary shaft 11 as a result of being opened When the adjustment screw 40 is loosened, the expansion plate portion 22 and the friction tube portion 21 are retracted due to the elastic restoring force of the material (e.g., plastic synthetic resin) of the friction drum 20 itself Thus, by adjusting the tightening degree (screwing depth) of the adjusting screw 40, the degree of opening of the frictional barrel 21 can be adjusted.

When the bulging plate portion 22 is a through plate, the extent of the spreading may be small, so that the bulging plate portion 22 can be formed with a cut-out portion 22d, for example, in a radial form. The illustrated embodiment is an example in which three sector cut-out portions 22d are formed at regular intervals in addition to the opening gap 22a.

In the illustrated embodiment, the housing cover 10 is provided with the nut 41, and the adjusting screw 40 is screwed and screwed together with the adjusting screw 40 and the nut 41, 10 may be threaded by forming a screw hole therein.

It is a matter of course that the adjusting screw 40 is preferably installed in a position such that a tool such as a screwdriver is easily accessible to the head of the adjusting screw 40 while the roller type screen 2 is mounted on a door or the like.

The roller drum 50 is a drum which is coupled to one end of the take-up roller 4 and rotates integrally with the take-up roller 4. The roller drum 50 is idled around the friction barrel 21 as shown in Fig. 8, and the inner peripheral surface of the roller drum 50 and the outer peripheral surface of the friction barrel 21 are in frictional contact.

8 is a view showing an example including up to a buffer drum 60 to be described later as an example of a winding speed adjusting device 1 according to the present invention and showing an example in which a buffer drum 60 In describing the winding speed adjusting device 1 of the invention, reference can be made to other figures including the buffer drum 60 in conjunction with FIG.

When the locking device 9 is released and released to open the screen 5 which has been closed in the roller type screen 2, the winding roller 4 is rotated by the elastic force stored in the spring 5 to roll the screen 6 If the elastic force stored in the spring 5 is too strong, the opening / closing frame 8 hits the housing 3 and excessive noise is generated. On the contrary, if the elastic force is weak, You must stop without going up, or you must stop when you go up and push up with your hand.

When the elastic force stored in the spring 5 is not appropriate, the elastic force can be adjusted by disassembling the housing 3 and adjusting the number of turns of the spring 5. However, It is a troublesome operation to disassemble, and whether the elasticity of the newly adjusted spring is proper can be confirmed only by opening and closing the screen after assembling. Therefore, it is a task to repeat trial and error several times, There is an inconvenience that the housing must be disassembled every time the elastic force is changed.

However, in the roller type screen 2 to which the winding speed adjusting device 1 of the present invention is applied, after the housing is assembled by setting the elastic force initially stored in the spring 5 to be somewhat stronger than normal, When the rising speed of the roller 8 is too fast to hit the housing, the adjusting screw 40 is tightened to bend the frictional barrel 21 as shown in Fig. 6B so that the outer peripheral surface of the frictional barrel 21 of Fig. The winding speed of the screen by the winding roller can be reduced. On the contrary, when the rising speed of the opening and closing frame 8 is too slow or too slow to be stopped at the middle, As shown in Fig. 6A, the adjusting screw 40 is loosened to cause the frictional cylindrical portion 21 to collapse to reduce the frictional resistance between the outer circumferential surface of the frictional sleeve portion 21 of Fig. 8 and the inner circumferential surface of the roller drum 50, Screen by roller It is possible to increase the winding speed of the belt.

In addition, according to the winding speed adjusting device 1 of the present invention, the screen 6 is repeatedly closed and opened, the state of the screen being opened and closed each time is checked, and the adjusting screw 40 is repeatedly tightened or loosened Since it is possible to find the most suitable winding speed, it is very convenient to adjust the winding speed.

The winding speed adjusting device 1 according to the present invention described above with reference to FIG. 8 is to adjust the winding speed of the winding roller by adjusting the magnitude of the frictional force between the friction barrel 21 and the roller drum 50 Since the frictional force generally acts strongly at the first moment of starting the first movement in the stopped state and weakly after the movement, the first moment when the opening and closing frame 8 is released from the locking device 9, Even if the winding speed of the winding roller is appropriately set by the adjustment of the adjusting screw 40, the opening and closing frame 8 may not be raised and may be stopped. In this case, the opening and closing frame 8 may be slightly raised The winding roller is rotated to open the screen.

In order to solve the incompleteness of the screen opening due to the relatively strong initial frictional force, the winding speed adjusting device 1 of the present invention includes a buffer drum 60 between the friction barrel 21 and the roller drum 50 .

The buffer drum 60 is idled around the friction barrel 21 so that the inner peripheral surface of the buffer drum frictionally contacts the outer peripheral surface of the friction barrel 21 and the roller drum 50 is fitted around the buffer drum 60, At this time, the roller drum 50 is allowed to idle within a range of 360 degrees with respect to the buffer drum 60, and rotates integrally with the buffer drum 60 when the rotation exceeds the range.

That is, in the embodiment in which the buffering drum 60 is not provided, as shown in Fig. 8, the amount of frictional force between the friction barrel 21 and the roller drum 50 is adjusted to rotate integrally with the roller drum 50 In the specific example in which the buffer drum 60 is added, the winding speed of the winding roller 4 is controlled. However, as shown in Figs. 1 to 5 and 7, between the friction barrel 21 and the buffer drum 60 The roller drum 50 is rotated in synchronization with the buffer drum 60 without any time difference, and the roller drum 50 does not rotate, and the parallax is within a range of 360 degrees Rotate.

In the embodiment shown in Fig. 7, as a concrete example in which the integral rotation between the buffer drum 60 and the roller drum 50 has a 180 degree parallax, the roller drum 50 has an inner circumferential surface, And two second locking protrusions 61 are formed on the outer circumferential surface of the buffering drum 60 corresponding to the first locking protrusions 51 at intervals of 180 degrees.

The roller drum 50 fitted around the cushioning drum 60 idles in a range of 180 degrees or less, but from the time when the second locking cushion 61 is caught by the first locking cushion 51, And the roller drum 50 rotate integrally.

7, when the opening / closing frame 8 is lowered to close the screen 5 as there is a 180-degree difference in the integral rotation between the buffer drum 60 and the roller drum 50, The roller drum 50 rotating integrally with the roller 4 is initially idle with respect to the buffer drum 60 within a range of 180 degrees or less and the second locking protrusion 61 on one side is engaged with the first locking protrusion 51 The roller drum 50 and the buffer drum 60 are integrally rotated in one direction from the point of time when the opening and closing frame 8 is locked by the locking device 9, The second engaging projection 61 of the engaging projection 61 comes into contact with the second engaging projection 61.

Thereafter, when the locking device 9 is released to open the screen 5, the winding roller 4 is rotated in the opposite direction by the elastic force of the spring 5, and the roller drum 50 is integrally rotated in the other direction The rotation of the roller drum 50 at the first 180 degrees is idly rotated with respect to the buffer drum 60 and the buffer drum 51 is rotated after the first locking projection 51 is caught by the second locking projection 61 at the other side 60 are rotated integrally with the roller drum 50.

That is, the frictional resistance between the friction drum 20 and the buffer drum 60 at the first moment when the lock device 9 is released and the screen 5 is opened is maintained until the roller drum 50 is rotated 180 degrees, The roller drum 50 does not rotate due to the initial frictional resistance. After the rotation of the roller drum 50 by 180 degrees, the roller drum 50 is rotated 180 degrees once The roller drum 50 having the roller drum 50 overcomes the initial frictional force between the buffer drum 60 and the friction drum 20 due to its rotational inertia and rotates the buffer drum 60 to rotate the friction drum 20 and the buffer drum Up roller 4 interlocked with the roller drum 50 by the frictional resistance between the buffer drum 60 and the friction drum 20 which are properly controlled while preventing the screen opening from being incomplete due to the initial frictional force between the buffer drum 60 and the friction drum 20, It is possible to appropriately adjust the winding speed of the belt.

At this time, when the first locking projection 51 and the second locking projection 61 are formed one by one, the initial idle rotation of the roller drum 50 with respect to the buffer drum 60 is 360 degrees and the first locking projection 51 and the second engaging projections 61 are formed at intervals of 180 degrees, the initial idle rotation is 180 degrees.

5, the opening plate 22 of the friction drum 20 inserted around the rotating shaft 11 is pressed by the buffering drum 60 and the buffering drum 60 is screwed to the end of the rotating shaft 11 The buffering drum 60 and the friction drum 20 are not inadvertently disengaged from the rotary shaft 11 because they are rotatably restrained by the fixing pieces 70 fixed to the rotary shaft 71. [

1: winding speed adjusting device of the present invention 2: roller type screen
3: housing 4: take-up roller
5: spring 6: screen (mesh),
7: Guide 8: Opening and closing frame
9: Locking device 10: Housing cover
11: rotating shaft 12: mounting recess
13: mounting groove 20: friction drum
21: Friction barrel 21a:
22: bulging plate portion 22a:
22b, 22c: both sides of the opening gap 22d:
30: fixture 40: adjusting screw
41: nut 50: roller drum
51: first stopping device 60: buffering drum
61: second locking projection 70:
71: Screw

Claims (4)

In the roller type screen 2 provided with the winding roller 4 for winding up the screen 6 by the elastic force of the spring 5 on the housing 3,
A housing cover (10) coupled to one side of the housing (3) and having a rotating shaft (11) for supporting the winding roller (4) idly;
A frictional tubular portion 21 inserted into the rotary shaft 11 and formed at one side thereof with a cutout 21a so as to elastically resiliently expand when an external force acts on the frictional tubular portion 21; A friction drum (20) formed to abut on a cutting portion (21a) and having a spreading plate portion (22) formed with a spreading gap (22a) continuous to the cut portion (21a);
A fixture (30) formed on the housing cover (10) and acting on one side (22b) of the opening gap (22a) to restrict rotation of the friction drum (20);
The degree of opening of the frictional sleeve portion 21 is adjusted by adjusting the degree of opening of the frangible gap 22a according to the degree of tightening of the frictional sleeve portion 21 in the housing cover 10 so as to act on the second side 22c of the frangible gap 22a, An adjusting screw (40) for adjusting the angle. And
Is wound around the outer peripheral surface of the frictional sleeve portion (21), and the inner peripheral surface of the frictional sleeve portion (21) is frictionally engaged with the outer peripheral surface of the frictional sleeve portion A contact roller drum 50;
Wherein the winding speed of the roller-type screen is controlled by the rotation speed of the roller-type screen. The method according to claim 1,
And a buffer drum 60 interposed between the friction barrel 21 and the roller drum 50. The buffer drum 60 is idly fitted around the friction barrel 21 so that the inner circumferential surface thereof The roller drum 50 is engaged with the outer circumferential surface of the friction barrel 21 and the roller drum 50 is fitted around the buffer drum 60 and is rotated integrally with the buffer drum 60 while allowing idling within a range of 360 degrees And is fitted around the buffer drum (60) in a rotating manner. 3. The method of claim 2,
A first locking protrusion 51 is formed on the inner circumferential surface of the roller drum 50 and a second locking protrusion 61 engaged with the first locking protrusion 51 is formed on the outer circumferential surface of the buffering drum 60 , And the roller drum (50) idles against the buffer drum (60) only until the second latching protrusion (61) is engaged with the first latching protrusion (51) Speed control device. 4. The method according to any one of claims 1 to 3,
And a cut-out portion (22d) is formed in the bulging plate portion (22).

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