KR101882212B1 - Door Sagging Prevention Device - Google Patents

Abstract

The present invention relates to a door sagging prevention device for a building, to prevent a hinged door from being sagged by self-weight. According to the present invention, the door sagging prevention device comprises: a groove (23) formed on a surface of a doorframe (22) coming in contact with a hinge operation part (31) installed in a door (20) by a predetermined depth and exposed to the outside through a cutting part (34) formed in a hinge fixing part (33); a center groove (24) formed on the center of the other side of the groove (23); a rotational part installed on the rear surface of the hinge fixing part (33) by a pivot pin (41) and disposed in the center groove (24) to be freely moved; an extension plate (42) extended from the rotational part (40) towards the inner side of the groove (23); a convex support plate (45) closely adhered to the front surface of the groove (23); a cover to hide one side of the groove (23); a pair of neutral springs (50, 52) to stop the extension plate (42) and the block support plate (45) at a predetermined position; a block passing through the cutting part (34) to enter the groove (23) when closing the door (20); and a pair of adjustment screws (70, 72) coupled to tap holes (61, 62) formed on a vertical surface of the block (60) and supported to the block support plate (45) while the door (20) is closed.

Description

{Door Sagging Prevention Device}

The present invention relates to a door sag preventing device for preventing door sagging due to its own weight, and more particularly, to a door sag preventing device for preventing door sagging, ≪ / RTI >

Generally, a door of a door that is installed at a doorway of a building is a door which is opened or closed by pushing or pulling. The door is opened and closed by rotating a large circle around a hinge installed at one side. The load of a relatively heavy door is cantilevered The door is slightly lowered over time so that the engagement of the door definition becomes inaccurate and the clearance between the door frame and the door becomes narrower as time elapses, making it difficult to open and close the door.

1, the structure of such a general hinged door is shown in FIG. 1. As shown in FIG. 1, one side of the door 10 is fixed to the door frame 11 by a hinge 12 And a door handle 13 with a handle is provided on the opposite side of the door handle 13. A latching piece (not shown) for latching the door latch 14, which protrudes and retracts from the door handle 13 toward the door frame 11, And a slight gap is formed between the door 10 and the door frame 11 so as to prevent interference when the door 10 is opened and closed.

The general door type door having such a structure gradually becomes heavier due to the higher quality of the building, and it is generalized to reach tens of Kg. At the beginning of the construction, the door 10 and the door frame 11 are maintained at a constant interval It is difficult to open and close the door 10 by changing the gap between the door frame 11 and the door 10 while the opposite side of the hinge 12 is sagged downward due to the own weight of the heavy door 10, There is a problem in that the door 10 is not closed because the engagement of the door 13 is inaccurate.

In order to solve this problem, Korean Utility Model Registration No. 20-0269615 discloses a structure in which a roller for supporting a bottom portion of a door is provided on a lower jaw portion of a door frame to support a bottom portion of the door when the door is closed A conventional technique 1 for preventing deflection has been proposed.

However, since the bottom of the door is in direct contact with the roller, the lower edge of the door is worn more and more and the door is damaged as the frequency of opening and closing the door is increased. It is very difficult to apply because it is not suitable for aesthetic view and it is very difficult to apply it because the gap between the door frame and the door has to be set to be as large as the height. Since the roller is installed at the lower side of the door frame, So that it was easily contaminated by foreign matter.

In the prior art 1, a spacer is used to adjust the height of the roller. However, if the height of the roller needs to be changed, it is inconvenient to replace the bolt with a spacer having a proper thickness in a disassembled state. There is a problem in that it is difficult to adjust the height accurately if the spacer having a thickness corresponding to the height to be adjusted is not prepared.

On the other hand, in Korean Patent Registration No. 10-1139240, there has been proposed a prior art 2 in which a door is jammed by projecting a rod by engagement of a rack and a pinion when the door is closed. Japanese Patent Application Laid-Open No. 10-1179144 There has been proposed a prior art 3 in which a door is supported while a roller rides on a bracket provided on the side of a door frame when the door is closed.

In the conventional art 2 and the conventional art 3, since a device for preventing sagging is installed separately from a hinge for connecting the door and the door frame, it takes a lot of time to install the door. Therefore, There was also a problem that a lot of exposed parts were harmed aesthetics.

Korean Registered Utility Model No. 20-0269615 (Notification Date March 25, 2002) Korean Registered Patent No. 10-1139240 (Published on May 14, 2012) Korean Registered Patent No. 10-1179144 (Published on September 07, 2012)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a hinge for connecting a door and a door frame, Device.

In order to accomplish the object of the present invention, there is provided a door deflection prevention device for a building, comprising a hinged door provided on a door, a hinge fixing part formed at a predetermined depth from a surface of the door frame, Lt; / RTI > A center groove formed at the center of the other side of the groove; A rotating part installed on a rear surface of the hinge fixing part by a pivot pin and positioned in the center groove and moving freely; An extension plate extending from the rotation portion toward the inside of the groove; A block supporting plate bent in an L-shape at the rear end of the extension plate and brought into close contact with the front surface of the groove; A spring seat formed by partially cutting the upper and lower portions of the extension plate; A cover formed to extend rearward from one side edge of the cutting portion to cover one side of the groove; A pair of neutral springs installed between the cover and the spring seat for stopping the extension plate and the block support plate at a predetermined position while balancing forces with each other; A block installed in the hinge and passing through the cutting portion when the door is closed and entering the groove; And a pair of adjusting screws coupled to the tapped holes formed in the vertical surface of the block and supported by the block supporting plate when the door is closed.

The present invention relates to an arc-shaped guide surface formed on an extension plate so as to have a center coinciding with a center of rotation of a hinge-movable part; And an arc-shaped convex support surface that slides along the guide surface when the door is closed and is formed on one side of the block.

A semicircular groove formed at the upper and lower portions of the block so as to coincide with the center of the door fastening hole formed in the hinge movable portion; A stop ring fitted in the door fastening hole and engaged with the semicircular groove; And a hollow hole formed at the center of the stop ring for passing a door fixing screw fixed to the door through the door fastening hole.

As described above, since the extension plate 42 and the block supporting plate 45 are kept stationary at the point where the neutral springs 50 and 52 balance the force, the door 20 It is possible to prevent the extension plate 42 from being excessively tilted to one side when it is opened.

The extension plate 42 and the block support plate 45 can be rotated by the rotation unit 40 and the pivot pin 41. Therefore, when the door 20 is closed, the guide surface 46 and the convex support surface 63 The rotation unit 40, the extension plate 42, and the block support plate 45 are rotated in conformity with the convex support surface 63 to smooth the entry of the block 60. [

Since the cover 35 is provided so as to cover one side of the groove 23, the exposed portion of the groove 23 can be reduced, thereby improving the appearance.

Since the hinged anchoring portion 33 whose one side is opened by the U-shaped cutting portion 34 is configured to be connected to the open portion by the cover 35 in the form of a letter, the rigidity It is possible to prevent the hinge fastening portion 33 from being widened or distorted.

Since the stop rings 80 and 82 formed on the hinge movable portion 31 are hooked by the semicircular grooves 64 and 65 formed on the upper and lower portions of the block 60, There is an effect that the block 60 can be prevented from moving.

The upper and lower gap between the block 60 and the block supporting plate 45 can be corrected by the adjusting screws 70 and 72 provided in the block 60. This makes it possible to more firmly support the door 20 It is effective.

Since the center groove 24 is formed in the groove 23, it is possible to prevent the rotating portion 40 and the pivot pin 41 from interfering with the door frame 22.

Figure 1 is a perspective view of a typical hinged door;
Figure 2 is a perspective view of a door according to the present invention,
3 is an exploded perspective view
4 is a rear perspective view of the assembled state according to the present invention.
Fig. 5 is an exploded perspective view of Fig.
Fig. 6 is a rear exploded perspective view of Fig. 5
7 is a front view showing the door according to the present invention opened;
8 is a sectional view taken along the line A-A 'in Fig. 7
Fig. 9 is a plan view showing the door closed from the state of Fig. 8
10 is a side cross-sectional view according to the present invention, in which the center of the door fixing screw and the center of the adjustment screw are cut in a stepped shape,

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

2 to 10, the present invention is a hinge for a door hinge, which is formed at a predetermined depth from the surface of a door frame 22 that meets with a hinge movable part 31 provided on the door 20, A groove (23) exposed to the outside through a C-shaped cutting portion (34) formed in the fixing portion (33); And a center groove 24 formed at the center of the other side of the groove 23.

The groove 23 may be formed in a rectangular shape when viewed from the front and the center groove 24 may prevent the rotary part 40 and the door frame 22 from interfering with each other when the following rotary part 40 moves And the center groove 24 is formed to a sufficient depth in order to prevent the rear end of the pivot pin 41 from coming into contact with the center groove 24.

The present invention is characterized by comprising: a rotation part (40) installed on a rear surface of a hinge fixing part (33) by a pivot pin (41) and positioned in a center groove (24) An extension plate 42 extending from the rotation part 40 toward the inside of the groove 23; And a block support plate 45 bent in an L-shape at the rear end of the extension plate 42 and brought into close contact with the front surface of the groove 23.

The hinge retaining portion 33 and the rotary portion 40 may be integrally formed with each other by using a steel plate having a constant thickness. The pin holes 33h and 40h are formed to insert the pivot pin 41 and then the front end of the pivot pin 41 is press-formed in the shape of a dish head to prevent the pivot pin 41 from coming off.

The block supporting plate 45 is brought into close contact with the inner front surface of the groove 23 so that the load acting from the door 20 is transmitted to the door frame 22 through the block 60 and the adjusting screws 70 and 72.

The present invention comprises spring sheets 43 and 44 formed by partially cutting the upper and lower portions of the extension plate 42, respectively; A cover 35 formed to extend rearward from one side edge of the cutting portion 34 to cover one side of the groove 23; A pair of neutral springs 50 (see FIG. 1) that are provided between the cover 35 and the spring seats 43 and 44 to stop the extension plate 42 and the block support plate 45 at a predetermined position 52).

The spring seats 43 and 44 are formed by cutting the upper and lower portions of the extension plate 42 in a straight line and then forming the same parallel to the cover 35. The spring sheets 43 and 44 and the cover 35 Bosses 35a, 35b, 43a, and 44a in the form of a round bar are provided on the upper and lower portions of the upper and lower portions to prevent the neutral springs 50 and 52 from being separated from each other.

The cover 35 may cover the one exposed portion of the groove 23 but may be formed by connecting the open portion of the hinge fixing portion 33 opened in the C shape by the cutting portion 34 in the shape of a letter, ) Is prevented from being opened or twisted.

The neutral springs 50 and 52 may be constituted by, for example, a compression coil spring formed by spirally winding a spring steel wire, and the pair of neutral springs 50 and 52 are all made the same.

The present invention comprises a block 60 installed in the hinged portion 31 and passing through the cutting portion 34 and entering the groove 23 when the door 20 is closed; Includes a pair of adjustment screws 70 and 72 that are coupled to the tapped holes 61 and 62 formed in the vertical plane of the block 60 and supported by the block support plate 45 when the door 20 is closed .

The hinge portion 31 is first installed on the door 20 and then the block 60 is installed before the block 60 is installed on the hinge movable portion 31. To this end, 66 are formed, and a circular hole 31e whose center is aligned with the through hole 66 is formed in the hinge movable portion 31. [

When the dish screws 32c and 32d are inserted through the dish holes 31c and 31d formed in the hinge movable portion 31 and fixed to the door 20 in order to fix the hinge movable portion 31 to the door 20, The block 60 is fixed to the hinge 31 so that the center of the through hole 66 and the circular hole 31e are in contact with each other so that the through hole 66 The block 60 is fixed to the hinged portion 31 by inserting the block fixing screw 67 through the circular hole 31e and inserting the block fixing screw 67 into the door 20. [

The adjustment screws 70 and 72 may be made of, for example, a headless wrench bolt and rotated between the block 60 and the block support plate 45 by alternately rotating the adjustment screws 70 and 72 in the forward and reverse directions. The upper and lower gap differences can be corrected through the adjustment screws 70 and 72. [

An arcuate guide surface (46) formed on the extension plate (42) so as to have a center which coincides with the center of rotation of the hinge movable part (31); And includes an arcuate convex bearing surface 63 that slides along the guide surface 46 when the door 20 is closed and is formed on one side of the block 60.

The guide surface 46 may be formed by bending the extension plate 42 in an arcuate shape and serves to guide and guide the convex support surface 63 when the door 20 is closed, , The block 60 and the extension plate 42 are kept in contact with each other to prevent the door 20 from tilting in the closing direction.

The present invention comprises semicircular grooves (64) (65) formed on the upper and lower portions of the block (60) so as to coincide with the center of the door fastening holes (31a) and (31b) formed in the hinge movable portion (31); Stop rings 80 and 82 fitted in the door fastening holes 31a and 31b and engaged with the semicircular grooves 64 and 65; A hollow hole 80h formed at the center of the stop rings 80 and 82 for allowing passage of the door fixing screws 32a and 32b fixed to the door 20 through the door fastening holes 31a and 31b, Lt; / RTI >

When the door fastening holes 31a and 31b are formed in the shape of a dish hole as in the illustrated example, a conical protrusion (not shown) is formed at the rear end of the stop rings 80 and 82, ) 82 is inserted into the door fastening holes 31a and 31b, self-centering can be performed.

The stop rings 80 and 82 are inserted into the door fastening holes 31a and 31b while the block 60 is fixed to the hinge movable portion 31 and the stop rings 80 and 82 are inserted into the door fastening holes 31a and 31b with the door fastening screws 32a and 32b, The hinge movable portion 31 is further firmly fixed to the door 20 and the outer peripheral surface of the stop rings 80 and 82 are in surface contact with the semicircular grooves 64 and 65, 60 can be prevented from swaying in the lateral direction.

Reference numerals 33a, 33b and 39 denote curling portions formed in the hinge fixing portion 33 and the hinged portion 31, respectively. Reference numerals 33c and 33d denote spacers provided between the curling portions 33a, 33b and 39, Reference numeral 36 denotes a hinge pin inserted into the center of the curling portions 33a, 33b and 39 to hinge-connect the hinge fixing portion 33 and the hinge-moving portion 31. 37a, 37b, 37c, And 37d show the door frame fastening holes formed in the hinge fixing portion 33. The door fastening holes 38a, 38b, 38c and 38d are formed in the door frame 22 through the door fastening holes 37a, 37b, 37c and 37d, And fixing the hinge fastening portion 33 to the door frame 22. As shown in Fig.

Hereinafter, the operation according to the present invention will be described in detail with reference to the accompanying drawings.

2 to 10, the hinge fixing portion 33 is brought into close contact with the door frame 22 in a state where the extension plate 42 and the block supporting plate 45 are inserted into the groove 23, When the screws 38a, 38b, 38c and 38d are inserted into the door frame 22 through the door frame fastening holes 37a, 37b, 37c and 37d, Respectively.

When the plate screws 32c and 32d are put into the door 20 through the dish holes 31c and 31d with the hinge 31 in close contact with the door 20, (Not shown).

The block 60 is brought into close contact with the hinge portion 31 so that the center of the through hole 66 formed in the block 60 and the center of the circular hole 31e formed in the hinge portion 31 are in contact with each other, The block 60 is fixed to the hinge movable portion 31 when the door 67 is inserted into the door 20 through the through hole 66 and the circular hole 31e.

At this time, the block 60 is rotated to the left and right so that the center of the semicircular grooves 64, 65 and the door fastening holes 31a, 31b are aligned with the stop rings 80 The door fixing screws 32a and 32b are inserted through the hollow holes 80h and 82h formed at the centers of the stop rings 80 and 82 and the door fastening holes 31a and 31b, The stop rings 80 and 82 are fixed to the hinge movable part 31 and the block 60 is not movable by the stop rings 80 and 82. [

9 and 10, when the door 20 in the opened state is closed, the convex support surface 63 formed on the block 60 slides along the guide surface 46 formed on the extension plate 42 When the door 20 is completely closed, the adjustment screws 70 (72) provided on the block 60 are held in contact with the block supporting plate 45 to be supported.

When the convex support surface 63 formed on the block 60 and the guide surface 46 formed on the extension plate 42 are not aligned with each other when the door 20 is closed as described above, the extension plate 42, the block support plate 45, The rotation part 40 is rotated about the pivot pin 41 so that the convex support surface 63 and the guide surface 46 are aligned with each other and the entry of the block 60 is smooth.

The neutral springs 50 and 52 prevent the extension plate 42 and the block support plate 45 from freely rotating when the door 20 is opened. (52) are kept stationary at a point where they balance the forces with each other.

When there is a difference between the upper and lower portions of the block 60 and the block supporting plate 45, the adjustment screws 70 and 72 are alternately rotated in the forward and reverse directions while the door 20 is opened, .

That is, when the door 20 is closed, the block 60 and the extension plate 42 prevent the door 20 from tilting in the closing direction, and the block supporting plate 45 The block 60 and the adjustment screws 70 and 72 serve to prevent the door 20 from sagging downward.

20: door 22: door frame
23: groove 24: center groove
31: hinged door 31a, 31b: door fastening hole
31c, 31d: Plate hole 31e: Circular hole
32a, 32b: door fixing screws 32c, 32d: plate screw
33: hinge fixing portions 33a, 33b, 39: curling portion
33c, 33d: spacer 34:
35: cover 36: hinge pin
37a, 37b, 37c, and 37d:
38a, 38b, 38c, 38d: door frame fixing screws
40: rotation part 33h, 40h: pin hole
41: Pivot pin 42: Extension plate
43, 44: spring seat 35a, 35b, 43a, 44a: boss
45: block support plate 46: guide surface
50, 52: Neutral spring 60: Block
61, 62: tapped hole 63: convex supporting surface
64,65: Semicircular groove 66: Through hole
67: block fixing screw 70, 72: adjusting screw
80, 82: stop ring 80h, 82h: hollow hole

Claims (3)

Shaped cutting portion 34 formed at a predetermined depth from the surface of the door frame 22 that meets with the hinge movable portion 31 provided on the door 20 and formed on the hinge fixing portion 33 provided on the door frame 22, A groove (23) exposed to the outside through a groove (23);
A center groove (24) formed at the other center of the groove (23);
A rotation part (40) installed on the rear surface of the hinge fixing part (33) by a pivot pin (41) and moving freely in the center groove (24);
An extension plate (42) extending from the rotation part (40) toward the inside of the groove (23);
A block supporting plate 45 bent in an L-shape at the rear end of the extension plate 42 and brought into close contact with the front surface of the groove 23;
Spring sheets 43 and 44 formed by partially cutting the upper and lower portions of the extension plate 42;
A cover (35) formed to extend rearward from one side edge of the cutting portion (34) and to cover one side of the groove (23);
And a pair of neutral springs 42 installed between the cover 35 and the spring seats 43 and 44 to stop the extension plate 42 and the block support plate 45 at a predetermined position, (50) (52);
A block 60 installed in the hinge moving part 31 and passing through the cutting part 34 to enter the groove 23 when the door 20 is closed;
A pair of adjusting screws 70 and 72 which are coupled to the tapped holes 61 and 62 formed on the vertical surface of the block 60 and supported by the block supporting plate 45 when the door 20 is closed, ;
Wherein the door locking device comprises: The method according to claim 1,
An arcuate guide surface (46) formed on the extension plate (42) so as to have a center coinciding with a rotation center of the hinge movable part (31);
An arc-shaped convex bearing surface 63 slid along the guide surface 46 when the door 20 is closed and formed on one side of the block 60;
Wherein the door locking device comprises: The method according to claim 1,
Semicircular grooves 64 and 65 formed at the upper and lower portions of the block 60 so as to coincide with the center of the door fastening holes 31a and 31b formed in the hinge movable portion 31;
Stop rings 80 and 82 fitted in the door fastening holes 31a and 31b and engaged with the semicircular grooves 64 and 65;
A hollow hole 32b formed at the center of the stop rings 80 and 82 for passing the door fixing screws 32a and 32b fixed to the door 20 through the door fastening holes 31a and 31b, (80h) (82h);
Wherein the door locking device comprises:

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