KR102510141B1 - Architectural door sagging prevention apparatus - Google Patents

Abstract

The present invention relates to a construction door sagging prevention device, which is individually and fixedly connected to a door frame and a door such that a hinge may be connected to allow the door to be rotationally opened and closed. To this end, the present invention comprises: a door frame side hinge which has a bolt coupling holder formed at a predetermined height at the upper portion in the width center, and a plurality of elongated bolt holes formed at a predetermined height on the plate surface to be fixedly fastened to be lifted by a predetermined height from the door frame; a damper in which an upper plate is formed to be liftable by a predetermined height from the inside, and a plate spring is inserted to support the upper plate in a liftable manner with a predetermined elasticity in the damper housing at the lower portion of the upper plate; a sub-gear shaft in which a lower bolt forming unit is bolt-coupled to the bolt coupling holder of the door frame side hinge, and which is rotationally and axially supported at a gear shaft by a bearing, wherein a sub-gear is axially fixed at the upper end portion; a main gear shaft which forms a control unit which is formed to be rotatable by the manual control at the end portion of the gear shaft which horizontally and axially supports a main gear in a rotatable manner, which is gear-coupled to the sub-gear of the sub-gear shaft; and a door height maintaining means which maintains the door always at a predetermined height from the floor surface by allowing the same to be elastically supported above the door load while a support ball allows a sleeve, which is provided in a liftable manner along the inner circumferential surface of a ball housing, to come in contact with the floor surface with a predetermined elasticity by the elasticity of a spring at the upper portion, at the upper portion of the support ball which is inserted into the ball housing, installed at the lower surface of the lower end portion of the door, to prevent downward dislocation. Therefore, the door may be prevented from sagging.

Description

Architectural door sagging prevention apparatus}

The present invention relates to a device for preventing sagging of a door for construction, and more particularly, the hinge on the side of the door frame connecting the door frame and the door is fixed so as to receive an upward force, and the hinge on the side of the door frame can be raised and lowered to a certain height by a simple rotation operation of a gear. The present invention relates to a device for preventing sagging of a door for construction, which simultaneously prevents a door from sagging above a certain height.

In general, a casement type door installed at the entrance of a building is a door that is opened and closed by pushing or pulling, and is opened and closed by rotating in a large circle around a hinge installed on one side. Since it is concentrated in the shape, as time elapses, the door slightly sags downward, making the door fitting inaccurate and the gap between the door frame and the door narrowing, which makes it difficult to open and close the door.

In other words, the biggest factor that causes the door to deflect is the repeated opening and closing process of the door over a long period of time. It is caused by this abrasion phenomenon, and this loosening and abrasion phenomenon often occurs at the position where the hinge is coupled to the doorframe side.

In recent years, as a device for preventing the sagging of the door, a door sagging prevention device has been proposed that increases the supporting force of the door through a latch structure to prevent the sagging of the door.

However, since the above anti-sagging device is configured such that the door frame fixing plate and the door support plate are screwed together, when the door is used repeatedly for a long time, the screw loosens due to shock or vibration, and the bearing capacity of the door decreases, resulting in sagging. there was

Registered Patent No. 2201483 (January 6, 2021) for preventing sagging of a building door prevents sagging of a door due to loosening of a screw by always maintaining the tightening force of a screw coupling a hinge of the door.

That is, a door frame coupling screw is screwed into the through-type nut body embedded in the door frame, and a screw fastening member is provided so as to apply a tightening force to the door frame coupling screw when the door is closed by being screwed to the door.

However, according to the prior art, since the loosening of the screw is prevented by simply maintaining the screw tightening force, the operation is simple, but there is a problem in that it is impossible to cope with the continuous load impact of the door only with the screw tightening force.

(Document 1) Registered Patent No. 2201483 (2021.01.06.)

Accordingly, the present invention is to solve the above problems, and the present invention is to ensure that the door always has an upward elasticity with respect to the hinge on the door frame side, and even if the door sags, the height of the door can be adjusted simply by manually rotating a gear. At the same time, an object of the present invention is to provide a door deflection prevention device for construction that prevents door deflection beyond a certain level.

In order to achieve the above object, the device for preventing sagging of a door for construction according to the present invention is fixedly connected to a door frame and a door, and a hinge is connected so that the door is rotated and opened. a door frame-side hinge that forms a plurality of long-hole bolt holes at a certain height on the plate surface to be fixedly fastened so as to be able to move up and down from the door frame at a certain height; The upper plate is formed to be able to move up and down from the inside to a certain height, and a damper in which a plate spring is inserted to support the upper plate so that the upper plate can be moved up and down with a certain elasticity inside the damper housing below the top plate; a sub-gear shaft in which a lower bolt forming part is bolted to the bolt-coupling holder of the door frame-side hinge, rotatably shaft-supported by a bearing to a gear shaft, and shaft-fixing a sub-gear at an upper end; a main gear shaft forming an operating unit formed to be rotatable by manual operation at an end of a gear shaft rotatably horizontally supporting a main gear coupled to a sub gear of the sub gear shaft; On the upper part of the support ball inserted into the ball housing buried in the bottom surface of the lower end of the door to prevent downward departure, a sleeve provided to be able to move up and down along the inner circumferential surface of the ball housing is moved by the spring elastic force from the upper part of the support ball It is a configuration composed of a combination of a door height maintaining means that keeps the door at a constant height from the floor by allowing the door to be elastically supported by more than the door load while contacting the floor with a certain elasticity.

A hinge coupling groove is formed in the door frame at a predetermined height higher than that of the door frame side hinge so that the door frame side hinge can be raised and lowered at a predetermined height.

As described above, while the door frame-side hinge fixed to the door frame is elastically supported in the vertical direction by the elasticity of the spring, the door frame-side hinge can be raised and lowered to a certain height by manual operation. This makes it easy to adjust the height of the door.

In addition, according to the present invention, the door can be opened and closed naturally while always maintaining a certain height from the floor surface by means of the door height maintaining means formed on the bottom surface of the door.

1 is an enlarged front view of a main part of the door frame side illustrating a device for preventing sagging of a door for construction according to the present invention;
Figure 2 is a side cross-sectional view of the door deflection prevention device for construction according to the present invention
Figure 3 is an enlarged cross-sectional view of a main part illustrating a means for maintaining the height of a door of a device for preventing sagging of a door for construction according to the present invention.
Figure 4 is an enlarged cross-sectional view illustrating a damper of a device for preventing sagging of a door for construction according to the present invention.
Figure 5 is a state diagram of the use of the door sagging prevention device for construction according to the present invention
Figure 6 is an operating state diagram for lifting and operating the door frame side hinge in the building door sagging prevention device according to the present invention

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention.

The scope of the present invention should not be construed as being limited by the embodiments described in the text.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the embodiments, the same reference numerals are assigned to the same components, and descriptions of the same reference numerals are omitted in some cases.

1 is an enlarged front view of a key part on the door frame side illustrating a device for preventing sagging of a door for construction according to the present invention, FIG. 2 is a cross-sectional side view of a device for preventing sagging of a door for construction according to the present invention, and FIG. 3 is a sagging door for construction according to the present invention. An enlarged cross-sectional view of a main part illustrating the structure of the door height maintaining means formed on the door in the prevention device.

As illustrated, the device for preventing sagging of a door for construction according to the present invention includes a door frame side hinge 10, a damper 20, a sub gear shaft 30, a main gear shaft 40, and a door height maintaining means 50 am.

The door frame side hinge 10 of the present invention is a part fixed to the door frame 1, and the bolt coupling holder 11 is formed at a certain height at the upper part of the center of the width on the plate surface, and is shaped as a long hole having a certain height on the plate surface. The bolt hole 12 formed by is formed in plurality.

Therefore, the hinge coupling groove 1a is formed in the door frame 1 at a certain height higher than the door frame side hinge 10 so that the door frame side hinge 10 can rise and fall at a certain height. so that it is firmly fixedly coupled to the door frame (1).

A damper 20 is provided on the bottom surface of the hinge coupling groove 1a formed in the door frame 1 to reduce the impact transmitted by the hinge 10 on the door frame side.

In other words, the damper 20 is formed on the bottom surface of the hinge coupling groove 1a as shown in FIG. 22) is provided, and a plate spring 23 is installed inside the damper housing 21 at the bottom of the upper plate 22.

In addition, a sub-gear shaft 30 is provided at the upper part of the door frame-side hinge 10, and the sub-gear shaft 30 is again composed of a bolt forming part 31, a gear shaft 32, and a sub-gear 33.

The sub gear shaft 30 forms a spiral with an outer circumferential surface at a certain height of the lower end of the gear shaft 32 to form a bolt forming part 31 to be screwed into the bolt coupling holder 11 of the hinge 10 on the door frame side. , The gear shaft 32 on the upper part of the bolt forming part 31 is coupled with a bearing to the door frame 1 so that it can rotate in the door frame 1, and the upper end of the gear shaft 32 has a sub gear with an upper outer circumferential surface ( 33) is formed.

At this time, the sub gear 33 is formed as a helical gear to transmit power in a right angle direction, and rotates the gear shaft 32 in the horizontal direction by the rotational force transmitted through the sub gear 33.

A main gear shaft 40 is provided across the top and front of the sub gear shaft 30, and the main gear shaft 40 consists of a main gear 41, a gear shaft 42, and a control unit 43. .

In the main gear shaft 40, the main gear 41 is made of a pair of helical gears that are shaft-fixed on the same axis in the horizontal gear shaft 42 and gear-coupled to the sub-gear 33, and the door frame 1 At the front end of the gear shaft 42, a manually operable control unit 43 is fixed to the shaft.

Therefore, when the control unit 43 is manually operated and rotated, the main gear 41 rotates in the vertical direction together with the gear shaft 42, and the rotation of the main gear 41 rotates the sub gear 33 in the horizontal direction. It rotates, and the bolt forming part 31 of the sub gear shaft 30 is rotated so that the door frame side hinge 10 can be moved in the vertical direction.

Meanwhile, a door height maintaining means 50 is provided on the bottom surface of the lower end of the door 2 connected to the door frame 1 by a hinge.

The door height maintaining means 50 is formed on the bottom surface of the door 2 to the end side corresponding to the end to which the hinge is connected, so that the elasticity of a certain pressure toward the bottom surface 3 is always in contact with the bottom surface 3 It is configured to roll with respect to the floor surface 3 when the door 2 rotates with the hinge as an axis.

The door height maintaining means 50 for this purpose is a box-shaped ball housing 51 with an empty inside inserted into the door 2 and a spherical support ball 52 inside the ball housing 51, but support The ball 52 is formed so that the lower part of the smaller diameter than the radius protrudes from the lower part of the ball housing 51, so that the lower surface of the ball housing 51 is open downward as a size smaller than the diameter of the support ball 52. do.

The upper portion of the support ball 52, a portion of which is inserted to protrude downward from the inside of the ball housing 51, is elastically supported by the sleeve 54 together with the plate spring 53.

That is, while the sleeve 54 provided to be able to move up and down along the inner circumferential surface of the ball housing 51 from the top of the support ball 52 is downwardly pressed by the plate spring 53 with a certain elasticity, the plate spring 53 The door 2 is prevented from sagging by the ball 52 elastically supported by the plate spring 53 by having elasticity corresponding to the load of the door 2 .

As described above, the action and effect of the device for preventing sagging of a building door according to the present invention will be described in more detail.

The device for preventing sagging of a door for construction according to the present invention prevents the sagging of the door 2 in both the frame 1 and the door 2 at the same time, so that the sagging of the door 2 can be prevented even when used for a long time.

In other words, as shown in FIG. 5, the door frame side hinge 10 fixed to the door frame 1 is supported by the damper 20 so that the door frame side hinge 10 is fixed in the hinge coupling groove 1a of the door frame 1. At the same time, the height of the door 2 is elastically maintained by the door height maintaining means 50 so that the door 2 does not droop and is maintained at a constant height.

In addition, according to the present invention, even if the door frame-side hinge 10 moves downward minutely as the door 2 sags due to the load of the door 2, the main provided on the top of the door frame-side hinge 10 as shown in FIG. Forming the bolt forming portion 31 while rotating the operating portion 43 of the gear shaft 40 to rotate the bolt forming portion 31 through the main gear 41 and the sub gear 33 made of helical gears Move the door frame-side hinge 10 slightly upward.

However, when the door frame-side hinge 10 is to be raised through the control unit 43, it is preferable to loosen the screw 1b fixing the door frame-side hinge 10 to the door frame 1. .

In this way, the present invention can be applied relatively simply, and the door 2 is prevented from sagging by the elastic force of the spring, and an impact greater than a load is applied to the door 2 by the continuous opening and closing operation of the door 2, thereby causing the door 2 to fail. Even if sagging occurs, there is a very useful effect of allowing the door 2 to be returned to its original position by raising the door frame side hinge 10 by a simple rotation operation of the control unit 43.

As such, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, it should be said that such modifications or variations fall within the scope of the present invention.

1 : door frame
1a: hinge coupling groove 1b: screw
2 : door
3: bottom surface
10: door frame side hinge
11: bolt coupling holder 12: bolt hole
20: damper
21: damper housing 22: top plate
23: leaf spring
30: sub gear shaft
31: bolt forming part 32: gear shaft
33: sub gear
40: main gear shaft
41: main gear 42: gear shaft
43: control panel
50: means for maintaining door height
51: ball housing 52: support ball
53: spring

Claims (2)

In the configuration in which hinges are connected to the door frame 1 and the door 2 to be fixedly connected to rotate and open and close the door 2,
A bolt coupling holder 11 is formed at the upper part of the center of the width with a certain length, and a plurality of long-hole bolt holes 12 are formed with a certain length on the plate surface to be fixed and fastened so as to be able to move up and down from the doorframe 1 to a certain height. Door frame side hinge 10 to be;
The upper plate 22 provided on the top of the plate spring 23 is supported so that it can be moved up and down with a certain elasticity by the plate spring 23 inserted into the damper housing 21, which is formed to be open to the top. a damper 20 to reduce the impact transmitted by the door frame side hinge 10;
A bolt-forming part 31 bolted to the bolt-coupled holder 11 of the door frame-side hinge 10, and a part of the upper part of the bolt-forming part 31 is rotatably shafted to the door frame 1 by a bearing. a sub-gear shaft 30 forming a supported gear shaft 32 and a sub-gear 33 shaft-fixed to an upper end of the gear shaft 32;
An operating unit 43 formed to be rotatable by manual manipulation at the end of the gear shaft 42 rotatably horizontally supporting the main gear 41 gear-coupled to the sub gear 33 of the sub gear shaft 30 ) The main gear shaft 40 forming a;
The upper part of the support ball 52, which is inserted to prevent downward departure from the inside of the ball housing 51 buried in the bottom surface of the lower end of the door 2, along the inner circumferential surface of the ball housing 51 A sleeve provided to be able to move up and down The support ball 52 contacts the bottom surface with a certain elasticity by the spring elastic force from the top of the (54), and the door 2 is elastically supported with more than the door load so that it is always maintained at a certain height from the bottom surface door height maintaining means 50;
is made up of a combination of
A hinge coupling groove 1a is formed in the doorframe 1 so that the doorframe-side hinge 10 can ascend and descend, and the doorframe-side hinge 10 is fastened with a screw 1b or a bolt to the doorframe ( 1) Anti-sagging device for building doors to be fixedly coupled to .
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