WO2008136560A1

WO2008136560A1 - Door hinge

Info

Publication number: WO2008136560A1
Application number: PCT/KR2007/005021
Authority: WO
Inventors: Sung-Tae Kang; Won-Keum Choi; Muk-Seon Choi; Sam-Young Noh; Jae-Jun Kim
Original assignee: Sung-Tae Kang; Won-Keum Choi
Priority date: 2007-05-07
Filing date: 2007-10-13
Publication date: 2008-11-13
Also published as: KR100979518B1; KR20080098757A

Abstract

Disclosed is a door hinge, which can show an enhanced supporting force against heavy load of a door while achieving satisfactory soundproofing and fireproofing effects, and also, can be used with a variety of door and doorframe designs. The door hinge includes a doorframe bracket to be installed to a doorframe and a door bracket to be installed to a door. The doorframe bracket has a guide pole, shaft supporting portions, a mounting opening perforated between the adjacent shaft supporting portions, and a door bracket insertion opening, and the guide pole and shaft supporting portions are subjected to rolling to define a shaft fitting space. The door bracket has a guide pole having upper and lower ends protruding upward and downward from the remaining portion of the door bracket, shaft supporting portions extending laterally from the guide pole, and a mounting opening perforated between the adjacent shaft supporting portions, and the guide pole and shaft supporting portions are subjected to rolling to define a shaft fitting space. Each shaft supporting portion of one of the brackets is engaged into a corresponding mounting opening of the other bracket in a toothed manner, and thereafter, a shaft and a shaft pin are fitted into the shaft fitting space defined by the shaft supporting portions to achieve a linear door hinge configuration having no risk of warping under heavy load.

Description

Description DOOR HINGE

Technical Field

[1] The present invention relates to a door hinge, and more particularly, to a door hinge, which can show an enhanced supporting force against heavy load of a door while achieving satisfactory soundproofing and fireproofing effects, and also, can be used with a variety of door and doorframe designs. Background Art

[2] A Hinge is an essential component of fireproof doors as well as general doors, and various designs of hinges are being developed in consideration of configurations and functions of such doors.

[3] As one example of the prior art, Korean Paten Publication No. 292540 discloses a hinge including: a U-shaped steel-made doorframe piece to be installed to a doorframe; a steel-made door piece to be installed to a door, the door piece being configured to be inserted into an opening of the U-shaped doorframe piece; cylindrical shaft connecting portions formed at facing ends of the door and doorframe pieces and pivotally rotatably connected with each other by means of a shaft pin inserted therethrough; a plurality of screw holes perforated in the door and doorframe coupling pieces; positioning protrusions provided at upper and lower positions of the door and doorframe coupling pieces adjacent to the shaft connecting portions thereof and configured to be caught by outer surfaces of the door and door frame; and hinge caps press-fitted into the upper and lower shaft connecting portions of the doorframe piece.

[4] Also, as another example of the prior art, Korean Utility Model Application No.

2005-0018169 discloses a door hinge having a stopper to limit the opening degree of a door. In the door hinge disclosed in the above Application, stopper protrusions for limiting the opening degree of a door are formed at outer circumferences of first and second bushings, which are fitted around a shaft pin and located between upper and lower shaft bores of a doorframe bracket and upper and lower ends of a shaft bore of a door bracket. The disclosed door hinge has the effect of preventing a door knob from colliding with a wall.

[5] Although the disclosed conventional hinge has an advantageous configuration capable of limiting the opening degree of a door, it does not achieve a sufficient structural integrity to withstand a heavy door and generates noise when the door is opened or closed.

[6] Furthermore, to install the conventional hinge, it is necessary to form hinge mounting recesses in a door and doorframe by cutting or other machining operations. Also, the hinge mounting recesses of the door and doorframe may cause a decline in the material strength of the door and doorframe since they are easily damaged or worn.

[7] Meanwhile, in the case where a door and doorframe have a double-angled coupling structure, the number of hinge mounting recesses in the door and doorframe should be increased. This has many problems of causing an unpleasant external appearance and increasing manufacturing costs of the hinge caused by cutting and machining of the mounting recesses. Disclosure of Invention Technical Problem

[8] Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a door hinge, in which door and doorframe brackets thereof are integrally coupled with each other via a coupling structure suitable to strongly couple a heavy door to a doorframe.

[9] It is another object of the present invention to provide a door hinge, in which door and doorframe brackets thereof have appropriately opened and closed configurations to prevent warping thereof even under heavy load, thereby preventing mismatching of a door and a doorframe. Technical Solution

[10] In accordance with the present invention, the above and other objects can be accomplished by the provision of a door hinge comprising: a doorframe bracket to be installed to a doorframe, the doorframe bracket having a guide pole, shaft supporting portions, a mounting opening perforated between the adjacent shaft supporting portions, and a door bracket insertion opening, the guide pole and shaft supporting portions being subjected to rolling, to define a shaft fitting space; and a door bracket to be installed to a door, the door bracket having a guide pole having upper and lower ends protruding upward and downward from the remaining portion of the door bracket, shaft supporting portions extending laterally from the guide pole, and a mounting opening perforated between the adjacent shaft supporting portions, the guide pole and shaft supporting portions being subjected to rolling, to define a shaft fitting space, wherein each shaft supporting portion of one of the brackets is engaged into a corresponding mounting opening of the other bracket in a toothed manner, and thereafter, a shaft and a shaft pin are fitted into the shaft fitting space defined by the shaft supporting portions, to achieve a linear door hinge configuration having no risk of warping under heavy load.

Advantageous Effects

[11] As apparent from the above description, the present invention provides a door hinge, which can be easily installed to a door and doorframe without separate mounting recesses in the door and doorframe. The door hinge of the present invention is applicable to all kinds of doors including fireproof and soundproof doors, wooden and metallic doors, and general room and office doors. In particular, when being used in special doors such as fireproof and soundproof doors or other doors and doorframes having an angled configuration, the door hinge of the present invention can achieve an outstanding mounting efficiency.

[12] In addition, according to the present invention, in a state wherein a door bracket and doorframe bracket of the door hinge are installed to the door and doorframe, predetermined portions of the door and doorframe brackets come into close contact with corner surfaces of the door and doorframe, so as to conceal coupling junctions with respect to the door and doorframe from view. As a result, the resulting door hinge can achieve an aesthetically pleasing external appearance.

[13] Furthermore, with the provision of guide poles connected with shaft supporting portions of the door and doorframe brackets, the shaft supporting portions can achieve a stable configuration without the risk of warping and variation in a distance therebewteen. In conclusion, the present invention is of utmost utility in the construction-material industry. Brief Description of the Drawings

[14] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[15] FIG. 1 is an exploded perspective view illustrating a door hinge according to a preferred embodiment of the present invention;

[16] FIG. 2 is a perspective view illustrating a method for manufacturing the door hinge according to the present invention;

[17] FIG. 3 is a perspective view illustrating coupling configuration of the door hinge according to the present invention;

[18] FIG. 4 is a perspective view illustrating a coupled state of the door hinge according to the present invention; and

[19] FIG. 5 is a perspective view illustrating a door hinge according to another embodiment of the present invention. Best Mode for Carrying Out the Invention

[20] Now, a door hinge according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The door hinge according to the present invention has a feature of resisting warping even under heavy load.

[21] As shown in FIGS. 1 to 4, the door hinge, which is configured to resist warping even under heavy load according to the present invention, includes a door bracket 160 and a doorframe bracket 150, which are installed to a door and a doorframe, respectively. For this, a shaft 130, shaft pin 140 and ring-shaped bushings 130-1 are assembled with the door and doorframe brackets 160 and 150. The door bracket 160 and doorframe bracket 150 are overlapped with each other such that the door bracket 160 is inserted into the doorframe bracket 150.

[22] In an important feature of the present invention, the doorframe bracket 150 has a closed periphery as opposed to an opened periphery, in order to prevent warping a distal end portion thereof. For this, the doorframe bracket 150 is formed, by cutting or punching, with mounting openings 30 and 40. Also, the doorframe bracket 150 is formed, by cutting or punching, with a door bracket insertion opening 120. A portion of the doorframe bracket 150, where the mounting openings 30 and 40 are located, will be a portion for fitting of the shaft 130.

[23] Specifically, the doorframe bracket 150 has a guide pole 70, and shaft supporting portions 50, 90, and 100 configured to define a space for fitting of the shaft 130. In the present embodiment, the two mounting openings 30 and 40 are alternately located between the three shaft supporting portions 50, 90, and 100. The door bracket insertion opening 120 is perforated in the doorframe bracket 150 for allowing the door bracket 160 to be seated in the doorframe bracket 150. The guide pole 70 and shaft supporting portions 50, 90, and 100 are subjected to rolling, to define a cylindrical shaft insertion space.

[24] The mounting openings 30 and 40 and door bracket insertion opening 120 of the doorframe bracket 150, formed by cutting or punching, are positioned so as not to cause an opened periphery of the doorframe bracket 150. This configuration has the effect of preventing warping of the doorframe bracket 150 when the shaft 130 is fitted into the door bracket 150.

[25] The guide pole 70 of the doorframe bracket 150 is configured to come into close contact with a corner surface of a doorframe, so as to be supported by the corner surface of the doorframe. As a result, the guide pole 70 serves to increase a coupling force between the doorframe and the doorframe bracket 150. Also, with the provision of the insertion opening 120, the door bracket 160 can be inserted into and seated in the doorframe bracket 150.

[26] FIG. 2 illustrates a method for rolling the doorframe bracket 150, to define the shaft fitting portion.

[27] Referring to FIG. 1 again, the door bracket 160 has a guide pole 80 having upper and lower ends protruding upward and downward from the remaining portion of the door bracket 160, upper and lower shaft supporting portions 10 and 20 extending laterally from the guide pole 80, and a mounting opening 60 perforated between the shaft supporting portions 10 and 20.

[28] In the course of rolling the guide pole 80 and shaft supporting portions 10 and 20 of the door bracket 160 as shown in FIG. 2, owing to the configuration in which the shaft supporting portions 10 and 20 are connected to the guide pole 80, the shaft supporting portions 10 and 20 have no risk of warping and being moved away from each other.

[29] The guide pole 80 has the same vertical length as the doorframe bracket 160, to sufficiently conceal a coupling junction between the door and the doorframe, thereby achieving an aesthetically pleasing external appearance of the resulting door hinge.

[30] In the present invention, each of the door bracket 160 and the doorframe bracket

150 has a plurality of fastening holes 110, to allow the door bracket 160 or doorframe bracket 150 to be installed to the door or doorframe as fasteners are inserted through the fastening holes.

[31] FIG. 5 illustrates a door hinge, which resists warping even under heavy load, according to another embodiment of the present invention. As shown in FIG. 5, the door hinge of the present embodiment includes the door bracket and doorframe bracket, each of which has an integrally-shaped body having a center angled portion 190 or 190-1.

[32] In a particular application wherein the door and doorframe have an angled configuration at their coupling junction, it is preferred that the door bracket 160 and doorframe bracket 150 have the angled portions 190 and 190-1, respectively, to correspond to the angled coupling junction of the door and doorframe. Except for the angled portions 190 and 190-1, the door hinge of the present embodiment is identical to that of the previously described embodiment. That is, the doorframe bracket 150 of the present embodiment incorporates the guide pole 70, shaft supporting portions 50, 90, and 100 for fitting of the shaft 130, mounting openings 30 and 40 alternately located between the shaft supporting portions 50, 90, and 100, and door bracket insertion opening 120, and the guide pole 70 and shaft supporting portions 50, 90, and 100 are subjected to rolling.

[33] Also, the door bracket 160 incorporates the guide pole 80 having upper and lower ends protruding upward and downward from the remaining portion of the door bracket 160, upper and lower shaft supporting portions 10 and 20 extending laterally from the guide pole 80, and mounting opening 60 perforated between the shaft supporting portions 10 and 20, and the guide pole 80 and shaft supporting portions 10 and 20 are subjected to rolling. The door bracket and doorframe bracket are coupled with each other as their shaft supporting portions are aligned in a line and the shaft is fitted through the shaft fitting space defined by the shaft supporting portions.

[34] The door having an angled configuration is generally equipped with various embellishments and thus, is very heavy. In consideration of characteristics of the door having an angled configuration, the door hinge of the present invention is devised to be advantageously used in particular with the above-described heavy door, and features the guide poles connected with the shaft supporting portions to enhance the structural integrity of the door hinge while preventing warping of the door hinge.

[35] As will be easily understood, the door hinge according to the present invention is applicable to various shapes of door hinges including a linear hinge, flagpole type hinge, N-shaped hinge, etc.

[36] Also, although not shown in the drawings, the door hinge of the present embodiment may be configured such that spikes are formed along an edge of each of the fastening holes that will come into close contact with the door or doorframe, to allow the door hinge to be easily mounted at the door and doorframe with an enhanced coupling force.

[37] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, these embodiments are merely provided by way of examples, and the present invention is applicable to linear or angled door hinges, and those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

[38]

Claims

[ 1 ] A door hinge comprising: a doorframe bracket to be installed to a doorframe, the doorframe bracket having a guide pole, shaft supporting portions, a mounting opening perforated between the adjacent shaft supporting portions, and a door bracket insertion opening, the guide pole and shaft supporting portions being subjected to rolling, to define a shaft fitting space; and a door bracket to be installed to a door, the door bracket having a guide pole having upper and lower ends protruding upward and downward from the remaining portion of the door bracket, shaft supporting portions extending laterally from the guide pole, and a mounting opening perforated between the adjacent shaft supporting portions, the guide pole and shaft supporting portions being subjected to rolling, to define a shaft fitting space, wherein each shaft supporting portion of one of the brackets is engaged into a corresponding mounting opening of the other bracket in a toothed manner, and thereafter, a shaft and a shaft pin are fitted into the shaft fitting space defined by the shaft supporting portions, to achieve a linear door hinge configuration having no risk of warping under heavy load.

[2] The door hinge according to claim 1, wherein the door bracket and doorframe bracket have a plurality of fastening holes perforated therein, and each fastening hole is formed with spikes along an edge thereof that will come into close contact with the door or doorframe.

[3] The door hinge according to claim 1, wherein each of the door bracket and doorframe bracket has an integrally- shaped body having an angled portion to prevent warping of the door hinge under heavy load.