KR100446221B1 - Auto Door Closer Unit - Google Patents

Abstract

The present invention relates to an automatic door closer unit, comprising a cylindrical housing having an upper opening, an actuator disposed rotatably inside the housing, and having a shaft embedded in an axial direction, and having a movable horizontal membrane on one side and a lower end. A damper cap that snaps to the center of the body so that the actuator is rotatably supported with a sealing portion having a flange portion at its outer circumference, and one of the shaft and the housing of the actuator is fixed to the door frame and the other is fixed to the door. And a torsion spring which gives a restoring force in the opposite direction when the motor rotates in one direction, and is fixedly coupled to the upper part of the housing so as to be closely disposed on the upper surface of the damper cap, and an actuator pressing means for pressing the actuator downward, and a shaft It is disposed inside, the connection groove is opened when the door is opened by the user the first and second fluid passages mutually Fluid flows from the first chamber to the second chamber to open the door quickly. When the door is closed, the connection groove is closed and the high viscosity fluid has a relatively small opening degree compared to the first fluid passage. It is characterized by consisting of the speed adjusting means of the door so that the door is slowly closed because it is introduced into the first chamber through the fluid passage.

Description

Automatic Door Closer Unit

The present invention relates to an automatic door closer unit, and in particular, the oil shutoff unit and the oil movement amount control unit are integrated into the actuator, and the fixed horizontal membrane and the movable horizontal membrane are reduced to the center inside of the actuator to reduce the overall volume. It is possible to improve the merchandise according to its shape, and it is equipped with the function to compensate for the wear of the actuator to improve the mechanical durability of the product, and the assembly of many assembly parts to improve the assembly and productivity. It is about a unit.

In general, the door closer (door closer) is installed in a large iron door, such as a fire door is an automatic door closing device that automatically restores to the original position automatically when released after opening the door.

Such automatic door closers are classified into a linear motion type using a piston and a rotary motion type using a restoring force generated by a rotational force applied to a rotating shaft according to a source of force for generating restoring force in an open door.

The linear motion type automatic door closer has a piston built in a hydraulic cylinder installed in a horizontal body case via a return spring, and the piston moves a rack installed at one side thereof by rotating a pinion shaft coupled thereto from side to side. do.

The door closer has a main body case installed at one upper surface of the door and the pinion shaft is hinged to the door frame through a pair of hinge arms.

In this case, when the door is opened, the pinion shaft rotates through the hinge arm, and the rotational force moves the piston through the rack to compress the spring contained in the cylinder. Then, when the door is released, the restoring force of the return spring is controlled by the fluid and the piston is released. At the set speed, the pinion shaft is also slowly and slowly rotated to close the door while maintaining a gentle speed.

Since the door closer is driven by a rack and pinion which is a linear hydraulic piston, the overall size of the main body case is large, and is supported by the door frame through a pair of long hinge arms. The beauty was greatly reduced and noise was generated at the hinge arm and various connections of the door closer body for a long time.

Furthermore, since the thrust load is applied to the pinion shaft, the door closer can easily generate piston and cylinder wear due to premature wear of the bearing supporting the pinion shaft and bending load.

In order to solve this problem, the above-described rotary motion automatic door closer is disclosed in Korean Patent Publication No. 202260.

The rotary motion-type door closer is rotatably inserted into a housing made of a metal material, respectively, wherein the housing is provided with a fixed horizontal membrane along an axial direction therein, and one side of the rotating body is provided with the fixed horizontal membrane. A corresponding movable horizontal film is formed so that the inside of the housing is divided into two chambers. In addition, the spring receiving groove in the lower part of the rotating body is provided with a torsion spring for imparting a restoring force to the door. In this case, high viscosity oil is filled in the two chambers and the spring receiving groove.

Meanwhile, a moving amount control part for controlling the movement amount of oil is formed at the upper end of the fixed horizontal membrane, and a check valve part for blocking the movement of oil is formed separately at the movable horizontal membrane, and the oil moving amount control part is formed at the fixed horizontal membrane of the housing. As a result, not only the processing method is difficult, but also there is a problem that the productivity is lowered.

The lower end of the rotating body is coupled to each other in contact with the axial support groove formed on the bottom surface of the housing.

However, such a door closer has a problem in that the overall size is not kept compact by the movable horizontal membrane which draws a large trajectory according to the rotation of the rotating body, and the structure of the housing is formed by forming the movement amount control unit on the upper side of the fixed horizontal membrane of the housing. Of course, there is a problem that the workability is significantly lowered accordingly.

In addition, since the oil-filled part is composed of the two chambers and the spring receiving groove, that is, three chambers in total, the method of injecting oil into the door closer penetrates the housing in a state where the door closer is fully assembled. Since the oil is injected into the second chamber, respectively, and then through a cumbersome method of filling the oil injection through part, there is a problem of deteriorating workability and productivity.

In addition, as the lower end of the rotating body repeats the rotation in contact with the shaft support groove during long time use, the rotating shaft and the bottom surface of the housing are mutually worn, so that the oil filled in the two chambers receives the spring along the worn gap. When the oil flows into the groove and the oil pressure of the two chambers is dispersed, the restoring force returned when the door is closed is lowered so that the door is not completely closed and the coupling force between the door closer and the supporting arm is lowered.

As a result, the oil pressure of the chamber is dispersed, and there is a serious problem that the door control ability is gradually lowered according to the long-term repeated use of the door during initial assembly.

Therefore, in order to solve the above problems, an object of the present invention is to integrate the oil cut-off unit and the oil movement amount control unit into the actuator at the same time, the fixed horizontal membrane and the movable horizontal membrane in the center of the actuator to reduce the total volume to It is to provide an automatic door closer unit that can improve the commerciality as it is made in a compact form.

In addition, another object of the present invention is to provide an automatic door closer unit having a function of correcting the wear of the actuator to improve the mechanical durability of the product and to improve the assembly and productivity by uniting a plurality of assembly parts.

1 is an exploded perspective view showing an automatic door closer unit according to the present invention,

2 is a plan view showing a combined state of the automatic door closer unit according to the present invention;

3 is a cross-sectional view taken along the line "A-A" shown in FIG.

4 is an enlarged view of a portion “B” shown in FIG. 3;

5A and 5B are schematic plan and side cross-sectional views showing a state in which a door in which an automatic door closer unit is installed according to the present invention is closed;

6A and 6B are schematic plan and side cross-sectional views showing a state in which a door in which an automatic door closer unit is installed according to the present invention is opened;

7A and 7B are schematic plan and side cross-sectional views showing a state in which a door in which an automatic door closer unit is installed according to the present invention is closed;

Figure 8 is a schematic plan view showing the closing speed for each turning section of the door by the acceleration groove formed in the sealing portion of the automatic door closer unit according to the present invention,

9 is a front view illustrating an example in which an automatic door closer unit according to the present invention is attached to a door and the door frame supporter is connected to the door frame through an articulated link;

10 is a front view illustrating an example in which an automatic door closer unit according to the present invention is installed on a door frame and a guide frame for guiding the door support is installed on the door;

11 is a front view showing an example in which an automatic door closer unit according to the present invention is connected to a door and a door frame by a door support and a door frame support using a hinge;

12A is an exploded perspective view illustrating the automatic door closer shown in FIG. 11;

12B is an exploded perspective view showing the lower hinge corresponding to the closer unit located at the top of the door shown in FIG. 11;

FIG. 13 is a front view showing an example in which the automatic door closer unit according to the present invention is installed in a hinge type; FIG.

14 is a perspective view of the automatic door closer unit shown in FIG. 13.

* Description of Signs for Main Parts in Drawings *

10: housing 10a: extension part

11: receptacle 13: first fixing groove

14: second fixing groove 15: snap ring coupling groove

16: step 17: first spring support groove

18a, 18b: fixed protrusion 19a, 19b, 190a, 190b: fixed protrusion

20: actuator 21: body

21a: first sealing engagement groove 21b: second sealing engagement groove

21c: snap coupling protrusion 23: sealing portion

23a: flange 23b: movable curtain

23c, 23d: acceleration groove 25: shaft

25a: polygon 25b, 25c: threaded portion

25d: coupling hole 25e: extension groove

26: control valve 27: compression spring

28: check ball 30: damper cap

31: snap coupling groove 33: fixed horizontal membrane

35: fixing protrusion 50: torsion spring

61: cover portion 63: through hole

65: fixing protrusion 67: inclined surface

68: fastening part 69: snap ring

71: first outflow passage 72: second outflow passage

73: third outflow passage 81: pin fixing groove

83: guide groove 85: stress retaining pin

91,93: sealing ring 120: door support

120a: Uneven portion 121: Tightening nut

122: door frame support L: articulated link

H: Hinge K: Handle

In order to achieve the above object, the present invention has a plurality of first and second fixing grooves are formed stepwise along the axial direction on the upper inner circumferential surface, the upper portion having a first spring support groove forming a stepped portion in the lower opening And a cylindrical housing, which is rotatably disposed inside the housing, and has a second spring supporting groove corresponding to the first spring supporting groove at a lower portion thereof, and a movable horizontal membrane protruding along the axial direction between the central portion and the body. And first to third fluid passages formed through the sealing portion and the central portion, and a coupling hole is formed at an upper portion thereof to communicate with the first and second fluid passages at an inner side thereof, and a coupling hole is formed at a lower end of the coupling hole. An actuator having a smaller diameter and having a connecting groove communicating with the second fluid passage extending therein is embedded in the axial direction and movable on the one side. Including a sealing portion having a membrane and a flange portion on the lower outer periphery, the actuator is snap-coupled to the center of the body so as to be rotatably supported, and has an inner circumferential surface in which the front end of the movable horizontal membrane is slidably contacted, and at one end of the inner side. The fixed horizontal membrane is formed to protrude along the axial direction so as to be slidable in contact with the outer circumferential surface of the sealing portion, and partitions the inner side into the first and second chambers, and is partitioned by the movable horizontal membrane and the fixed horizontal membrane. A first chamber communicating with the first and third fluid passages, and a second chamber communicating with the second fluid passage, the upper periphery of the damper cap having a plurality of fixing protrusions corresponding to the first fixing grooves of the housing; And one of the shaft and the housing of the actuator is installed between the first and second spring support grooves to the door frame. And a torsion spring which is fixed to the door and gives a restoring force in the opposite direction when the other one is fixed to the door, and is fixedly coupled to the upper part of the housing so as to be closely disposed on the upper surface of the damper cap, and presses the actuator downward. Actuator pressurizing means for being disposed in the shaft and is introduced through the first fluid passage from the first chamber when any one of the actuator or the housing is rotated in one direction as the door is opened by the user. As the connection groove is opened by the highly viscous fluid, the first and second fluid passages communicate with each other, the fluid moves from the first chamber to the second chamber, and the door opens quickly, and the user opens the door to close the door. When the door is opened, either the actuator or the housing, which has been rotated in one direction, is the torsion spring. It is rotated in the reverse direction by the restoring force and the connection groove is closed by the high viscosity fluid moving from the second chamber through the second fluid passage, and the high viscosity fluid discharged from the second fluid passage is lower than the first fluid passage. Since the first fluid flows into the first chamber through a third fluid passage having a relatively small opening degree, the automatic door closer unit is configured as a speed adjusting means of the door to close the door gradually.

In this case, the speed adjusting means includes a control valve screwed to the coupling hole of the shaft so that the lower outer circumferential surface of the third fluid passage controls the moving amount of the fluid by moving up and down through the coupling hole; A check ball disposed between the coupling hole and the extension groove of the shaft to open and close the first fluid passage in accordance with the rotational direction of the actuator, and between the lower end of the control valve and the check ball. It consists of a compression spring elastically supported to close the fluid passage.

The apparatus further includes a bushing means disposed in contact between the inner circumferential surface of the housing and the lower outer circumferential surface of the actuator to support the actuator and prevent the actuator in the housing from being laterally deflected by external forces.

In addition, the actuator pressing means is provided with a plurality of fixing projections each of which is inserted into the outer periphery corresponding to the second groove of the housing and has an inclined surface inclined upward in the outward direction, and the inclined surface in contact with the inclined surface of the pressing hole along the inclined surface; Consists of a snap ring for pressing the pressing hole in the downward direction as a portion is inserted into the groove formed to cross the second fixing groove of the housing in a state having a resilient force in the direction perpendicular to the axial direction from the center of the actuator do.

In addition, the pin fixing groove formed on the outer peripheral surface of the upper body of the actuator, the guide groove formed horizontally in the direction of the center of the circle on the upper surface of the pressing hole at the same level as the pin fixing groove, and the tip through the housing It further comprises an initial stress setting means consisting of a stress fixing pin inserted into the pin fixing groove through; The initial stress setting means rotates the fixing groove of the actuator at the same axis as the guide groove, and then locks the door closer to the guide groove and the fixing groove in a state in which the door closer is fixed. When the stress fixing pin is removed after fixing to any one, the door is completely in contact with the door frame by the restoring force accumulated in the return means.

In addition, the flange upper surface of the sealing portion further comprises at least one speed acceleration groove having a strange length in the circumferential direction at least than the movable horizontal film thickness; When the actuator is rotated in the direction in which the door is closed, the closing speed of the door is increased as the high-viscosity fluid moves from one chamber of high pressure to another chamber of low pressure while the acceleration groove is in contact with the lower surface of the fixed horizontal membrane.

In addition, an extension part formed on the upper end of the housing to extend the second fixing groove of the housing along the axial direction, a fastening part extended higher than the extension part of the housing along the axial direction toward the upper center of the cover part, and one side A door support having a concave-convex portion corresponding to the second fixing groove of the extension part and having a plurality of through holes for fixing to the door upper surface through a plurality of pieces, and having the same diameter as that of the housing, It further comprises a fastening nut screwed to the fastening portion to support.

In addition, a connection rod having one end fixedly coupled to the shaft of the actuator is formed, and the other end of the connection rod has a guide groove which is slidably coupled, and further comprises a door support means comprising a guide bracket fixed to the door in a horizontal direction. Include.

Therefore, in the present invention, it is made of a structure that can control the restoring force of the torsion spring mounted therein only by the relative rotational movement of the housing and the actuator, and significantly improved the oil control method compared to the conventional homogeneous type and also wear inside In case of occurrence, it is equipped with automatic correction function to improve mechanical stability and improve productability.

In addition, as the trajectory of the movable horizontal membrane and the fixed horizontal membrane is reduced and the position of the oil movement amount control unit is moved upward, the overall compact structure can be achieved while minimizing the failure rate and unitizing parts to increase productivity and assemblability.

(Example)

Hereinafter, the configuration of the automatic door closer unit according to the present invention with reference to the accompanying drawings in detail as follows.

1 is an exploded perspective view showing an automatic door closer unit according to the present invention, FIG. 2 is a plan view showing a coupled state of the automatic door closer unit according to the present invention, and FIG. It is sectional drawing along the AA "line, and FIG. 4 is an enlarged view of the" B "part shown in FIG.

First, the automatic door closer unit according to the present invention includes a cylindrical housing 10 having an upper opening as shown in FIGS. 1 to 4, and the housing 10 has an accommodating portion 11 inward and an upper inner circumferential surface thereof. A plurality of first and second fixing grooves 13 and 14 are formed stepped up and down along the axial direction, and in this case, the second ring groove 14 is a snap ring coupling into which a snap ring 69 described below is inserted. The groove 15 is formed along the circumferential direction,

In addition, the lower inner side of the housing, the upper end forms the stepped portion 16, the first spring support groove 17 is formed with a pair of fixing projections (18a, 18b) protruding in the center.

In addition, when the housing 10 is of the type attached to the door (D) as shown in Figure 9, the fixing piece (19a, 19b) is formed extending to the left / right side of the housing 10, the housing 10 as shown in FIG. ) Is a type fixed to the door frame (D1), the fixing pieces (190a, 190b) is formed to extend up and down as shown in FIG.

Meanwhile, the actuator 20 is seated on the stepped portion 16 of the housing 10 in a state where a bush 40 having abrasion resistance made of acetal is inserted at the bottom as shown in FIGS. 1 and 3. It is rotatably inserted inside.

In this case, the actuator 20 has a body 21 having a lower diameter larger than the upper diameter, and a lower end of the body 21 has a diameter corresponding to the first spring support groove 17 as shown in FIG. 3. The second spring support groove 22 is formed.

The upper end of the torsion spring 50 is inserted into and fixed to the pair of engaging projections 21d and 21e of the second spring support groove 22 in the first and second spring support grooves 17 and 22, and the lower end of the housing ( As it is inserted into and fixed to the pair of fixing protrusions 18a and 18b of 10), the restoring stress is generated as the actuator 20 is twisted according to the rotation of the actuator 20.

In addition, the actuator 20 is formed with a sealing portion 23 having elasticity detachably coupled to the central portion, the sealing portion 23 has a lower end on the outer upper surface of the first spring support groove 22 A movable horizontal film 23b having a flange 23a seated thereon and protruding along the axial direction is formed.

In this case, a pair of acceleration grooves 23c and 23d are formed on the upper surface of the flange 23a at predetermined intervals along the circumferential direction in order to accelerate the closing speed of the door in a certain section. In this case, the acceleration grooves 23c and 23d are formed. Is preferably set larger than the width of the fixed horizontal membrane 33 described below to allow high viscosity fluid to flow from one chamber of high pressure to another chamber of low pressure.

The sealing part 23 is made of rubber or synthetic resin material having elasticity so that the upper end of the sealing part 23 and the outer circumference of the flange 23a are formed to be in close contact with the inside of the housing 10. Maintaining the primary hermetic of the two chambers (C1, C2), and also to maintain the hermetic of the high-viscosity fluid filled in the body 21 between the sealing portion 23 and the damper cap 30 described below As the first and second sealing coupling grooves 21a and 21b are formed up and down with the sealing part 23 therebetween, secondary sealing is achieved.

In this case, the sealing rings 91 and 93 coupled to the first and second sealing coupling grooves 21a and 21b may be made of any one of an O-ring or a U-packing.

An upper portion of the body 21 is provided with a shaft 25 embedded in the axial direction so that the upper portion partially protrudes, and the upper outer circumference of the shaft 25 is coupled to one end of the door support L2. And a screw processing portion 25b to which a cap nut (not shown) for preventing separation of the support is fastened.

In this case, the shaft 25 has a coupling hole 25d formed along the axial direction so that the control valve 26 mentioned below is screwed on the inner side, and the coupling hole 25d has a lower end than the coupling hole 25d at the lower end of the coupling hole 25d. An extension groove 25e having a small diameter extends in the axial direction.

In addition, the damper cap 20 coupled to the body 21 to rotatably support the actuator 20 in a state including the sealing portion 23, the tip of the movable horizontal film 23b is slidably contacted. It has an inner circumferential surface is formed and a fixed horizontal membrane 33 is formed protruding along the axial direction in a state in which the tip is slidably contacted with the outer circumferential surface of the sealing portion 23.

In this case, as shown in FIG. 3, the lower side of the damper cap 30 has a snap coupling groove 31 to be detachably snapped to the snap coupling protrusion 21c protruding in the circumferential direction along the lower outer peripheral surface of the body 21 of the actuator. ) Is formed.

Inside the damper cap 30, the damper cap 30 is divided into first and second chambers C1 and C2 by the fixed horizontal membrane 33, respectively, and the first and second chambers C1, C2) moves the highly viscous fluid filled in the first and second chambers (C1, C2) to each chamber by turning the movable horizontal film (23b) in the forward / reverse direction in accordance with the forward / reverse rotation of the actuator 20 The volume of the hydraulic pressure in each of the chambers C1 and C2 is varied so as to have a high pressure or a low pressure.

In addition, the damper cap 30 is provided with a plurality of fixing projections 35 to be inserted into the first fixing groove 13 in the upper peripheral portion so as to be fixed to the inside of the housing.

In this case, unlike the automatic door closer according to the prior art, the automatic door closer unit according to the present invention is used to fill a high viscosity fluid, for example oil, into the first and second chambers C1 and C2. After the 20 and the damper cap 30 is completely deposited in a separate container (not shown) in which oil is contained, the actuator 20 and the damper cap 30 are snapped to each other. The oil can then be simply filled.

Meanwhile, in the damper cap 30, when the fixed horizontal membrane 33 is disposed from the center to the left side as shown in FIG. 2, the movable horizontal membrane 23b is disposed to the right, and the rotation direction of the actuator 20 is clockwise. When the fixed horizontal membrane 33 of the damper cap 30 is disposed from the center to the right side, the movable horizontal membrane 23b is disposed to the left, and the rotation direction of the actuator 20 is set counterclockwise. Accordingly, the damper cap 30 and the actuator 20 may be selectively coupled to the housing 10 according to the opening and closing direction of the door.

In addition, as shown in FIG. 3, a first outflow passage 71 is formed around one side of the movable horizontal film 23b of the sealing part 23 at right angles with the extension groove 25e of the shaft 25. Above the outlet passage 71, a third outlet passage 73 is formed to communicate with the coupling hole 25c of the shaft 25 at a right angle, and the first and third outlet passages 71 and 73 are formed on the outlet passage 71. On the other side of the movable horizontal film 23b, the second outflow passage 72 is formed to communicate with the coupling hole 25c of the shaft at a right angle.

In this case, the first to third outflow passages 71 and 73 are formed through the sealing portion 23 and the body 21 of the actuator in a direction perpendicular to the axial direction, respectively, and in particular, the second outflow passage 72. ) Is preferably positioned at the level between the first and third outflow passages 71 and 73 and is disposed above the check ball 28.

In addition, the control valve 26 screwed to the shaft 25 moves up and down along the coupling hole 25c to control the movement amount of the fluid filled in the chambers C1 and C2. 3 is preferably formed to a length that can limit the opening degree of the outflow passage (73).

In this case, a compression spring 27 is disposed at a lower end of the control valve 26, and a check ball 28 elastically supported by the compression spring 27 to open and close the first fluid passage 71 is extended. It is seated on the top of the groove 25e.

Accordingly, the fixed horizontal membrane 33 and the movable horizontal membrane 23b are disposed at the center outer periphery of the actuator 20, and unlike the conventional automatic door closer, the check valve unit and the movement amount control unit are integrated into one, compared to the conventional one. The present invention can greatly reduce the size of the door closer, it is possible to precisely control the closing speed of the door.

On the other hand, the cover portion 61 correspondingly formed so that the lower surface is seated on the upper surface of the damper cap 30 has a through hole 63 through which an upper portion of the body penetrates and close contact with the upper surface shape of the damper cap 30. And a plurality of fixing protrusions 65 each having an inclined surface 67 correspondingly inserted into the second fixing groove 14 on the outer circumference thereof and having an upper surface inclined upward by approximately 10 ° as shown in FIG. 4.

In this case, a snap ring 69 coupled to the snap ring coupling recess 15 of the housing 10 is formed at an upper portion of the cover 61, and the snap ring 69 is an inclined surface 67 of the cover 61. It is coupled to the state having a resilient force in the horizontal direction from the center of the actuator 20 along the inclined surface 67 in contact with the.

The snap ring 69 maintains a state in which the pressing hole 61 is pressed downward against the inclined surface 67 of the pressing hole 61. Accordingly, the cover portion 61 has a damper cap 30 and If the lower end of the actuator 20, which rubs against the bush 40 according to the rotation of the actuator 20 when the actuator 20 is pressed for a long time, the snap ring 69 is fixed in proportion to the wear rate. The deeper coupling to the snap ring coupling groove 15 along the inclined surface (67) of the) continuously pressurizes the actuator 20 to maintain a firm coupling force, thereby maintaining the initial performance of the automatic door closer unit for a long time. .

In this case, as shown in FIG. 3, when the cover part 61 is coupled to the housing 10 so that the cover part 61 can move downward in proportion to the wear of the bush 40, the cover part 61. Lower ends of the plurality of fixing protrusions 65 to maintain a predetermined distance from the second fixing groove 14 of the housing 10, and also in the case of the damper cap 30, lower ends of the plurality of fixing protrusions 35. It is formed to maintain a predetermined distance from the first fixing groove 13 to ensure a free space for automatic pressing.

In addition, the automatic door closer unit according to the present invention, after assembling the plurality of parts, before the installation on the door by rotating the actuator 20 by a predetermined angle to the door in a state in which the restoring force is applied to the actuator 20 After installation, an initial setting means is provided for increasing the closing force of the door by releasing the restoring force.

This initial setting means is a pin fixing groove 81 formed in the upper peripheral surface of the body 21 of the actuator 20, and the pin fixing groove in a state that the pressing hole 61 is fixedly coupled to the housing 10. Guide grooves 83 formed on the upper surface of the pressing hole 61 along the center direction of the actuator 20 at the same level as the 81 and penetrated from the outer side of the housing 10 to the tip groove 83 According to the pin fixing groove 81 is made of a stress fixing pin (85).

The initial setting of the automatic door closer unit through the initial setting means is as follows.

In this case, the fixing protrusion 35 of the damper cap 30 is coupled to the first fixing groove 13 so that the fixing horizontal membrane 33 of the damper cap 30 is disposed at a predetermined angle to the left of the center. The movable horizontal film 23b is disposed at a predetermined angle on the right side about the center.

At this time, the guide groove 83 of the cover portion 61 is pre-positioned in the same axial direction as the pin fixing groove 81 by rotating the actuator 20.

Accordingly, the pin fixing groove 81 of the actuator rotates a predetermined angle in a counterclockwise direction to a position in the same axial direction as the guide groove 83, and then one side of the housing 10 with the stress fixing pin 85. It is inserted through the guide groove 83 and the pin fixing groove 81 to fix the actuator 20. In this case, the torsion spring 50 is twisted and the restoring stress is axially stressed.

In this state, the automatic door closer unit is installed in the closed door as shown in FIG. 5A, and when the stress fixing pin 85 is removed, the actuator 20 is driven by the restoring force accumulated in the torsion spring 50. The force to rotate to the original position is generated, and thus the door is in a state where a constant force is stored in the closed direction so that the door can be completely closed to the door frame, and the door can be prevented from being opened by sudden draft. .

5A to 7B, the automatic door closer unit of the present invention is fixed to the door D as shown in FIG. 9 by the fixing pieces 19a and 19b, and the refractive link L is shown in FIG. 9. One end is fixed to the upper end of the door frame (D1) by the door frame support (L1) of the housing rotation-shaft fixed type connected to the shaft 25 by the door support (L2), respectively.

In this case, a state in which the door is closed, a state being opened by the user, and a state in which the door is closed when the user releases the door will be described in detail.

5A and 5B are schematic plan and side cross-sectional views showing a state in which a door in which an automatic door closer unit is installed according to the present invention is closed, and FIGS. 6A and 6B are installed in the automatic door closer unit according to the present invention. Fig. 7A and Fig. 7B are schematic plan and side cross-sectional views showing a state in which a door on which an automatic door closer unit according to the present invention is closed is closed.

First, when the door closer unit is installed in the initial setting state in the door as shown in FIGS. 5A and 5B, the fluids in the first and second chambers C1 and C2 do not move with each other.

Subsequently, when the user grasps the handle K and opens the door around the hinge H as shown in FIGS. 6A and 6B, the housing 10 pivots in a clockwise direction, thereby being fixed to the housing 10. The fixed horizontal membrane 33 of the damper cap pivots clockwise.

Accordingly, the first chamber C1 maintains a high pressure state and the second chamber C2 maintains a low pressure state. At this time, the high-viscosity fluid of the door D filled in the first chamber C1 is removed. 1 As the check ball 28 elastically supported by the compression spring 27 is pushed upward through the fluid passage 71 and rapidly flows into the second chamber C2 through the second fluid passage 72, the door When opening, no additional hydraulic pressure is generated, but only the restoring force of the torsion spring 50 operates on the door, thereby easily opening the door.

Then, when the user puts the door to close the open door, the fixed horizontal membrane 33 is rotated in the counterclockwise direction as shown in Figs. 7a and 7b in this case is elastically supported by the compression spring (27) The checked ball 28 stops the movement of the fluid flowing from the first outlet hole to close the extension groove 25e.

Therefore, the high-viscosity fluid sent out to the coupling hole 25d through the second fluid passage 72 is automatically blocked from flowing into the first chamber C1 through the first fluid passage 71 so that the second chamber ( Hydraulic pressure is generated in the C2) and thereby the restoring force of the torsion spring 50 to be restored can be hydraulically controlled, so that the door D is gradually closed in proportion to the hydraulic pressure.

At this time, the third fluid passage 73 may set the opening degree by adjusting the up / down in the axial direction of the control valve 26, and the amount of movement of the fluid from the high pressure chamber to the low pressure chamber according to the set opening degree. I can regulate it. In FIG. 7B, the third fluid passage 73 is opened by about 50%.

Meanwhile, in addition to the control valve 26, as the acceleration grooves 23c and 23d are formed in the flange portion 23a of the sealing portion, the closing speed is controlled for each turning section S1 to S4 in which the door is closed, as shown in FIG. 8. In the case where the fixed horizontal membrane 33 passes over the acceleration grooves 23c and 23d during the turning, that is, in the S1 and S3, the high-viscosity fluid flows from the second chamber C2 through the acceleration grooves 23c and 23d. As it flows into (C1), the door turns quickly, and S2 and S4 turn at normal speed.

Such acceleration grooves 23c and 23d allow the fluid flow to be arbitrarily adjusted according to the depth and length thereof, and can change the closing speed of the door for each section separately from the speed adjusting means. Various door close speeds can be achieved depending on the application and application.

10 is a front view illustrating an example in which an automatic door closer unit according to the present invention is installed in a door frame and a guide frame for guiding the door support is installed in the door. In this case, the housing is fixed-shaft rotation type.

As shown in FIG. 10, the housing 10 is fixed to the door frame D1 by fixing pieces 190a and 190b extending upward and downward, and one end is fixedly coupled to the polygonal portion 25a of the shaft and the other end is horizontal to the door. The door support 110 slidably coupled to the guide frame 112 coupled in the direction is disposed.

In this case, when the user opens the door, the actuator 20 pivots in the housing 10, and at the same time, after the door support 110 moves a predetermined distance along the guide frame 112, the user moves the door ( When the D) is released, the door support 110 moves along the guide frame 112 to close the door as the actuator 20 pivots in the reverse direction by the restoring force. Where H represents a hinge.

FIG. 11 is a front view illustrating an example in which the automatic door closer unit according to the present invention is connected to the door and the door frame by the door support and the door frame support using the upper door frame assembly type of the pivot hinge, and FIG. 12A is shown in FIG. An exploded perspective view showing an automatic door closer, and FIG. 12B is an exploded perspective view showing a lower hinge corresponding to the closer unit located above the door shown in FIG.

When the door frame support 122 and the door support 120 are connected to the shaft 25 and the housing 10, respectively, as shown in FIG. 11, the shaft is fixed-housing rotation type.

First, in order to extend the second fixing groove 14 of the housing 10 along the axial direction, an extension part 10a is formed on the upper end of the housing 10, and an axial direction is formed in the upper center of the cover part 61. Along the upper end of the extension portion (10a) of the housing along the fastening portion 68 is a threaded portion is formed on the outer periphery.

In addition, the door support 120 has an uneven portion 120b inserted into the second fixing groove 14 of the extension part on one side thereof, and the other side is fixed to the door D by a plurality of pieces (not shown). A plurality of through holes 120c are formed.

At this time, the fastening nut 121 for fixing the door support 120 coupled to the second fixing groove 14 of the extension to the housing 120 is screwed to the fastening portion 68. In this case, the door support 120 may be used as a unit with the housing 10 by the fastening nut 121.

In addition, the door frame support 122 is fixed to the upper side of the door frame (D1) through a plurality of through holes (122b), such as a piece (not shown), and one end portion 25a for coupling to the polygonal portion 25a of the shaft. The engagement hole 122a corresponding to this is formed.

In addition, the hinge for rotatably supporting the lower part of the door D is fixed to one end of the door frame D1 at the lower part of the bearing 139 having the through hole 139a at the center as shown in FIG. The door frame support 137 having the 138 is disposed, the pin in the state in which the door support 130 is formed, the upper end of the bearing 139 is fixed to the door (D) and the pin coupling hole 131 is formed at the other end The hinge pin 133 is inserted into and engaged with the coupling hole 131 and the through hole 139a of the bearing. Here, the member number 135 is a screw fixing hole.

When the automatic door closer unit opens and closes the door D, the housing 10 of the automatic door closer unit rotates about the shaft 25 and accordingly supports the door D rotatably. The automatic door closer unit can be easily assembled and installed in a manner similar to the pivot hinge type door mounting method without using an articulated link, arm or lever.

On the other hand, Figure 13 is a front view showing an example of applying the automatic door closer unit according to the present invention installed in the hinge type, Figure 14 is a perspective view of the automatic door closer unit shown in FIG.

As shown in FIG. 13, the automatic door closer unit extends along the axial direction of the first hinge part 141 coupled to the door frame on one circumferential surface of the housing 10, and one end is fixedly coupled to the shaft 25, and the other side of the door is closed. It is provided with the second hinge portion 143 coupled to. In this case, the first and second hinge parts 141 and 143 are coupled to any one of the door frame or the door through a plurality of coupling holes 141a and 143a as pieces (not shown).

In this case, the housing fixed-shaft rotation type is an example in which the automatic door closer unit is integrally coupled to the hinge rotatably supporting the side of the door, and can be installed very compactly.

In addition, in the above embodiment, the application example is described with respect to the door opening in one direction, while in the case of the door opening in both directions, the automatic door closer unit is installed in the upper part of the door and the bottom of the door frame corresponding to the same axial direction, respectively. In addition, it is of course possible to apply a bidirectional door that can be pivoted about one axis within approximately 270 ° by hinge-fixing each shaft to the top of the door frame and the bottom of the door, respectively.

On the other hand, the present invention has been described an application example on the basis of a door disposed in a general building, in addition to the doors of various furniture, doors of household appliances such as refrigerators, electronic doors such as copier covers, car doors, bonnets, trunks, etc. Likewise, it can be applied to doors and covers mainly opened and closed.

In the present invention described above is made of a structure capable of controlling the restoring force of the torsion spring mounted therein only by the relative rotational movement of the housing and the actuator, and significantly improved the oil control method compared to the conventional type of the same type and the internal wear In case of occurrence, it is equipped with automatic correction function to improve mechanical stability and improve product quality.

In addition, by reducing the trajectory of the movable side membrane and the fixed side membrane and moving the position of the oil movement amount control unit to the upper part, the overall compact structure is achieved while minimizing the failure rate and uniting parts to increase productivity and assemblability. There is this.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention. Various changes and modifications will be possible by those who have the same.

Claims (8)

A cylindrical housing having an upper opening having a plurality of first and second fixing grooves stepped in an axial direction along an upper inner circumferential surface thereof and having a first spring supporting groove forming a stepped portion inwardly; Is rotatably disposed in the housing, the lower portion is formed with a second spring support groove corresponding to the first spring support groove, and has a movable horizontal membrane protruding along the axial direction between the central portion and the body and the sealing First to third fluid passages are formed through the upper portion and the central portion, and a coupling hole is formed at an upper portion thereof in communication with the first and second fluid passages, and has a smaller diameter than the coupling hole at a lower end of the coupling hole. An actuator in which a shaft having an extended connection groove communicating with the second fluid passage is embedded along the axial direction; It has an inner circumferential surface having a movable horizontal membrane on one side and a snap coupled to the center of the body so that the actuator is rotatably supported in a state including a sealing portion provided with a flange portion on the lower outer periphery, and the front end of the movable horizontal membrane is slidably contacted. And a fixed horizontal membrane protruding along the axial direction so as to be slidable in a state in which the tip is in contact with the outer circumferential surface of the sealing portion, and a fixed horizontal membrane partitioning the inner side into the first and second chambers is formed on the movable side membrane and the fixed horizontal membrane. And a first chamber communicating with the first and third fluid passages and a second chamber communicating with the second fluid passage, the plurality of fixings being inserted into the first fixing groove of the housing at an upper portion of the outer periphery. A damper cap with protrusions formed thereon, A torsion spring installed between the first and second spring support grooves to provide a restoring force in the opposite direction when one of the shaft and the housing of the actuator is fixed to the door frame and the other is fixed to the door to rotate in one direction. and, An actuator pressurizing means fixedly coupled to an upper portion of the housing so as to be in close contact with the upper surface of the damper cap, and for pressing the actuator downward; The coupling groove is disposed inside the shaft and is connected by the high viscosity fluid flowing through the first fluid passage from the first chamber when any one of the actuator or the housing rotates in one direction as the door is opened by the user. As opened, the first and second fluid passages communicate with each other, the fluid moves from the first chamber to the second chamber, causing the door to open quickly, and in one direction when the user releases the open door to close the door. Either the actuator or the housing which is rotated rotates in the reverse direction by the restoring force of the torsion spring, and the coupling groove is closed by the high viscosity fluid moving from the second chamber through the second fluid passage and the second fluid passage. The high viscosity fluid discharged from the air is set to have a relatively small opening degree compared to the first fluid passage. Because through the third fluid passage flows into the first chamber an automatic door closure that unit characterized in that the door is slowly closed so that consists of a speed control means of the door. The method of claim 1, wherein the speed adjusting means is screwed to the coupling hole of the shaft to control the movement of the fluid by adjusting the opening and closing range of the third fluid passage as the lower outer peripheral surface moves up and down through the coupling hole With control valve, A check ball disposed between the coupling hole and the extension groove of the shaft to open and close the first fluid passage according to the rotational direction of the actuator; And a compression spring disposed between the lower end of the control valve and the check ball and configured to elastically support the check ball to close the first fluid passage. The bushing means according to claim 1, further comprising a bushing means disposed in contact between the inner circumferential surface of the housing and the lower outer circumferential surface of the actuator to support the actuator and prevent the actuator in the housing from deflecting laterally by an external force. Automatic door closer unit comprising a. The method of claim 1, wherein the actuator pressing means is provided with a plurality of fixing projections having a plurality of fixing projections each having an inclined surface correspondingly inserted into the second groove of the housing on the outer circumference and inclined upward in the outward direction; The crimping port is inserted into a groove formed to cross the second fixing groove of the housing in contact with the inclined surface of the crimping hole and having a resilient force in a direction perpendicular to the axial direction from the center of the actuator along the inclined surface. Automatic door closer unit, characterized in that consisting of a snap ring for pressing downward. According to claim 1, Pin fixing groove formed on the outer peripheral surface of the body of the actuator, A guide groove formed horizontally in the direction of the center of the circle on the upper surface of the pressing hole at the same level as the pin fixing groove, And an initial stress setting means configured to include a stress fixing pin penetrating the housing and having a tip inserted into the pin fixing groove through the guide groove; The initial stress setting means rotates the fixing groove of the actuator at the same axis as the guide groove, and then locks the door closer to the guide groove and the fixing groove in a state in which the door closer is fixed. Automatic door closer unit characterized in that the door is completely in contact with the door frame direction by the restoring force accumulated in the return means after fixing to any one. 2. The flange of claim 1, further comprising: at least one speed acceleration recess in the sealing upper surface with a length longer than at least the movable horizontal film thickness along the circumferential direction; When the actuator is rotated in the direction in which the door is closed, the closing speed of the door is increased as the high viscosity fluid moves from one chamber of high pressure to another chamber of low pressure while the accelerator groove is in contact with the lower surface of the fixed horizontal membrane. Automatic door closer unit. According to claim 1, Extension portion formed on the upper end of the housing for extending the second fixing groove of the housing along the axial direction, A fastening part extending higher than an extension part of the housing along an axial direction toward an upper center of the cover part; A door support having a concave-convex portion inserted into the second fixing groove of the extension part on one side thereof and having a plurality of through-holes for fixing the plurality of pieces on the upper surface of the door; And a fastening nut made of the same diameter as the housing and screwed to the fastening part to support the door support. The guide rod of claim 1, wherein a connecting rod having one end fixedly coupled to the shaft of the actuator is formed, and the other end of the connecting rod has a guide groove to which the other end of the connecting rod is slidably coupled. Automatic door closer unit, characterized in that it further comprises a door support means.