KR20130053499A - Construction work methods of variable style assembly doorframe and that assembly doorframe - Google Patents

Construction work methods of variable style assembly doorframe and that assembly doorframe Download PDF

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Publication number
KR20130053499A
KR20130053499A KR1020110118351A KR20110118351A KR20130053499A KR 20130053499 A KR20130053499 A KR 20130053499A KR 1020110118351 A KR1020110118351 A KR 1020110118351A KR 20110118351 A KR20110118351 A KR 20110118351A KR 20130053499 A KR20130053499 A KR 20130053499A
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KR
South Korea
Prior art keywords
door frame
frame
door
coupling
cap
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Application number
KR1020110118351A
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Korean (ko)
Inventor
오현아
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오현아
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Priority to KR1020110118351A priority Critical patent/KR20130053499A/en
Publication of KR20130053499A publication Critical patent/KR20130053499A/en

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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
    • E06B1/02—Base frames, i.e. template frames for openings in walls or the like, provided with means for securing a further rigidly-mounted frame; Special adaptations of frames to be fixed therein
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
    • E06B1/04—Frames for doors, windows, or the like to be fixed in openings

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Door And Window Frames Mounted To Openings (AREA)

Abstract

PURPOSE: A variable door frame assembly and a construction method for the same are provided to reduce the construction period and costs by removing a process for hiding a tacker pin head and improve the external appearance. CONSTITUTION: A variable door frame assembly comprises a temporary door frame member(100), a stopper member(200), a front door frame cap(300), a rear door frame cap(400), and a door stud member(500). A variable door frame assembly comprises the following steps: installing a temporary door frame by touching a door wall(A) with the outer side; positioning the stopper member inside the temporary door frame for joining by hammering a tacker pin(a); closely attaching the front and rear door frame caps to the front and rear inner side edges of the temporary door frame for sealing the hammered part of the tacker pin; and joining the door stud member to the front side of the front door frame cap.

Description

Construction method of variable style assembly doorframe and that assembly doorframe

The present invention relates to a variable assembly door frame for forming a door frame on the wall for constituting the door on the wall, and more particularly, the outer surface is installed to abut the wall to form the door, the front door frame cap coupled to the front surface Forming a support piece for supporting, and the rear surface, which is the opposite surface of the front surface on which the support piece is formed, constitutes a crest frame member having a fixed coupling groove for the rear door frame cap is coupled and fixed, and in the crest frame member Combining configuration on the side, so that the front and rear sides of the Takapin pinned soaking projected to form a tapping pin fixed to each other, and to conceal the head of the takapin embedded in the nailed portion, one end of the door frame cap coupling groove Consists of a stopper member which is formed to be bent at a right angle to abut on the front inner surface edge of the frame member, the front side member and the door member The front door frame cap is formed to protrude forward and the rear end portion comprises a front door frame cap formed with a coupling portion for engaging the coupling groove of the stopper member, and is perpendicular to the rear inner surface edge of the frame member. Bending is formed, but in the front end is formed a coupling portion for coupling to the coupling groove of the stopper member, the rear side inner surface constitutes a rear door frame cap formed of a splice frame coupling protrusion for coupling to the fixed coupling groove of the frame member, The side portion relates to a variable assembly door frame and a method of constructing the assembly door frame including a door member formed with a protrusion coupling groove to be coupled to the door coupling protrusion formed on one side of the front door frame cap.

In general, the door frame is to install the door to rotate or sliding opening and closing operation.

The door frame is mainly made of a solid wood or compressed wood and formed into a single frame, the door frame is installed in the opening of the wall, and then the door is installed in the door frame.

However, when the processing of the door frame or the door is not exactly matched, the assembly gap defects such as the door is in contact with the door frame or too far apart due to the torsional deformation of the door frame or the door often occurred.

In this case, the door was reassembled and re-installed, or after the work of correcting the assembly gap by cutting or polishing the assembly gap of the door frame or the door, that is, the parts that do not exactly fit.

As described above, the conventional door frame not only greatly reduces the workability of the door, but also directly cuts and polishes the outer surface of the door frame or the door to compensate for the assembly gap, so that the assembly gap cannot be effectively compensated. There was a problem such as damaging the appearance of the door frame or door.

In order to overcome this problem, conventionally provided various prefabricated door frame, looking at it as follows.

Patent No. 10-0528063 (2005.11.04) consists of bent parts 11, 11 'and horizontal extension parts 12, 12' to surround the inner and outer edges of the frame 1 Outer door frame cover (10, 10 '), and the center door frame cover 20 is coupled to the upper portion of the inner and outer door frame cover (10, 10') to adjust the length according to the width of the frame (1) In the variable door frame cover (A) that can be installed by finishing, the inner and outer door frame covers (10, 10 ') are the same shape, the inner frame of the bent portion (11) (11') is a frame (1) The support portion 14 (13) is formed in the horizontal extension portions 12 and 12 'which form grooves 13 and 13' which can maintain the tightness with each other and extend to the bent portions 11 and 11 '. 14 ') is formed to protrude, and the inner surface of the support portion 14, 14' is formed to be inclined inwardly to prevent the inclination prevention surface 15, 15 'is formed on the opposite side of the fitting groove 16 along the longitudinal direction 16 'is formed, and one side of the inner and outer door frame covers 10 and 10'. The shock absorbing member 17 is fitted into the fitting groove 16 of the frame cover 10, and the anti-separation slope 15 and 15 ′ between the inner door frame cover 10 and the outer door frame cover 10 ′. And a central door frame cover 20 having fitting inclined surfaces 22 and 22 'corresponding to each other, and opposing side door frame cover 10' of the one side door frame cover 10 to which the impact buffer member 17 is fitted. The finishing material 18 is fitted, the central door frame cover 20 is formed on both sides of the lower locking jaw (23, 23 ') along the longitudinal direction and the locking jaw (23, 23') to fit inside · The outer door frame cover 10, 10 'of the anti-separation inclined surface (15, 15') to form a locking groove (14a, 14a '), respectively, to provide a variable door frame cover that is detachably coupled to each other.

In Patent No. 10-0729949 (2007.06.13), which is installed on the wall surface 5 to be installed to open and close the door 2, it is fixedly installed on the wall surface 5, and has a space for adjusting the gap forward in the center ( Fixed frame 10 having a coupling frame 15 having an assembly groove portion 16 on the outer front to both sides of the assembly member 11 having the opposite side and the interval between the assembly member 11 at the front of the fixing frame. Assembly member 25 having a spacing adjustment assembly 26 for insertion and assembly into the assembly groove portion 16 of the support frame 15 on the outside rear to both sides of the center assembly frame 21 supported by the adjustment projection (12). The door frame 100 is composed of an assembly frame 20 configured to oppose and a stopper 30 coupled to the front of the assembly frame to form a stepped engaging portion 31 for opening and closing the door at the side, the door frame ( 100, and the projections 12, the jaws of the fixed frame according to the assembly gap of the door (2) Cutting and polishing the end of the assembly protrusion 26 of the frame to adjust the gap to adjust the gap between the door frame and the door, the stepped joint 31 between the assembly frame 20 and the stopper (30) Protruding and inserting the rubber gasket 35 is in close contact with the door 2, the fixing frame 10 and the assembly frame 20 and the stopper 30 is the concave protrusion to the center in order to be mutually coupled to each other (18) (27,28) 38 are formed to be assembled such that the protrusions 29 of the assembly frame 20 are inserted into the recesses 18 of the fixed frame 10, and the recesses of the assembly frame 20 are formed. (28) provides a prefabricated door frame frame that is assembled to be assembled to the protrusion 39 of the stopper (30).

Registered Utility Model No. 20-0279155 (2002.06.08), the central door frame member is formed at the end of the extension blade extending to one side and the other side with the fixed projection formed in the center and the one side by the support projection Fixed side door frame member that is fixedly coupled to the reinforcement frame of the cladding frame in the state of fixing the fixing projections of the extension blade, and variable side fixed to the reinforcement frame of the splint frame in a variable position inside the other extension blade according to the thickness of the wall It is made of a door frame member, the fixed side door frame member and the variable side door frame member provides a variable swing door frame configured in the same form.

In Korean Utility Model Registration No. 20-0340523 (January 26, 2004), the doors on both sides of the left and right sides contacting both sides of the core material coupled to one side of the opening opened in the wall surface of the building, and having an insertion groove formed on one side thereof, In the door frame structure consisting of a stopper in which the fitting portions respectively inserted into the insertion grooves of the door lines protrude from both ends, the insertion grooves 122 formed on one side of the door lines 120 and 120 are inclined inwardly inclined at a predetermined angle ( 121 is formed in an inclined shape, the fitting portion 132 formed at both ends of the stopper 130 is inclined by an outward inclined surface 131 at an angle with an inwardly inclined surface formed in the insertion groove of the door. The stopper may be formed in a photo shape, and an opening 133 having an opening therein is further formed, and at least one auxiliary wall 134 is further formed inside the opening, and fitting portions formed at both ends of the stopper are formed at the stopper. It provides a prefabricated door frame structure that is formed by concave inward from both ends.

However, in recent years, the installation of the door is different from the opening and closing direction according to the structure of the building, the conventional variable door frame is installed in the door to change the installation position of the door after installation because the installation position of the door is determined, dismantle the installed door And, after dismantling the door frame to change the direction, there was a problem that the construction is inconvenient because it must be re-installed.

In addition, as shown in FIG. 1, the structure of the conventional door frame is complicated, so that the molding process is difficult, thereby increasing the unit cost of the product, and of course, the conventional door frame assembly is fixed to the frame by takapin work, thus leaving numerous traces of work such as takapin. There was a problem.

The present invention is to solve the above-mentioned conventional problems, an object of the present invention is fixed to the stopper member with a takapin to the frame member, the takapin nailed portion to cover the front door frame cap and the rear door frame cap taka pin By minimizing the exposure of the head to the outside, it is not only aesthetically pleasing, but can also omit the sheet attaching work or the paint application work to hide the takapin head, and reduce the subsidiary material cost required for the assembly of the door frame. The purpose is to provide a variable assembly door frame made of a very fast construction.

And it is configured to adjust the width of the frame according to the thickness of the wall, the purpose of providing a variable assembly door frame does not need to rework the door frame according to the thickness of the wall.

In order to achieve the above object, the present invention is installed so that the outer surface abuts on the wall constituting the door, the front surface to form a support piece for supporting the front door frame cap coupled, before forming the support piece The rear surface, which is the opposite side of the side, constitutes a crest frame member having a fixed coupling groove for the rear door frame cap to be coupled and fixed. , Each of the rear side is formed with a stopper member protruding the nailing nailed with taka pin, and forming a coupling groove to which one end of the door frame caps are coupled to conceal the head of the nailed nailed nail, and the front of the frame member. It is formed to be bent at a right angle to be coupled to the inner side edges, the front side protruding to form a joint engaging projection coupled to the door member, the rear end of the Consists of the front door frame cap formed with a coupling portion for coupling to the coupling groove of the topper member, bent at a right angle to engage the rear inner surface edge of the frame member, the front end is coupled to the coupling groove of the stopper member Forming a coupling portion, the rear side inner surface is formed a rear door frame cap formed of a splice frame coupling projection for coupling to the fixed coupling groove of the frame member, the one side portion of the front door frame cap coupled to the door joint coupling projection formed on one side It is characterized in that it comprises a door member formed with a projection coupling groove as possible.

In addition, the front door frame cap and the rear door frame cap is configured to separate the front and rear side of the frame to be coupled to the frame body, the front and rear side flows along the slide groove formed inwardly of the frame body It is characterized by the configuration to adjust the width of the frame.

And a crest frame installation step of installing a crest frame to be installed so that the outer surface abuts on the wall to form a door; A stopper member coupling step of coupling a stopper member by placing a stopper member on the inner side of the crest frame installed by the crest frame installation process and then placing taka pins on the sewn portion; A front door frame cap coupling step of tightly coupling the front door frame cap to finish the front inner surface edge of the door frame installed by the door frame installation process; A rear door frame cap coupling step of tightly coupling the rear door frame cap to finish the rear inner edge of the rear door frame installed by the door frame installation process; The door member joining process of joining the door member to the front surface of the front door frame cap coupled to the frame by the front door frame cap coupling process; characterized in that it consists in order.

As described above, the present invention is fixed to the stopper member with takapin to the crest frame member, to minimize the exposure of the takapin head to the outside to conceal the front door frame cap and the rear door frame cap in which the taco pin is embedded, aesthetic view Not only is it a novel invention with the effect that it can omit the sheet | seat attaching work and paint application work to hide a takapin head.

And it is a novel invention that can not only reduce the subsidiary material cost required for the assembly of the door frame for the same reason, but also the construction of the door frame is made very fast.

In addition, the width of the door frame can be adjusted according to the thickness of the wall, it is a novel invention that does not need to rework the door frame according to the thickness of the wall during construction.

1 is a cross-sectional view showing the configuration of a conventional prefabricated door frame
Figure 2 is a cross-sectional view showing the configuration of the present invention variable assembly door frame
Figure 3 is an exploded perspective view showing the configuration of the present invention variable assembly door frame
Figure 4 is a perspective view showing the completed assembly state of the present invention variable assembly door frame
5 is a block diagram showing a construction method of a variable assembly door frame according to the present invention
6 is an exemplary view showing another configuration example according to the configuration of the present invention
Figure 7 is a cross-sectional view showing an embodiment of another configuration of the present invention

In order to achieve the above object, the present invention will be described in detail with reference to the accompanying drawings.

In constructing a variable assembly door frame,

It is installed so that the outer surface abuts on the wall to form the door, the front surface to form a support piece for supporting the front door frame cap coupled, the rear door frame cap on the rear surface of the front surface formed the support piece A crest frame member forming a fixed coupling groove to be coupled and fixed;

Coupled to the inner surface of the frame member, so that the front and rear sides of each of the front and rear so as to be fixed to the tapping pins to form a sticking portion in which the ta pin is embedded, so as to conceal the head of the takapin embedded in the nailing, one end of the door frame caps A stopper member having a coupling groove to be coupled thereto;

It is formed to be bent at a right angle to be coupled to the front inner surface edge of the frame member, the front side protruding to form a tangential engaging projection coupled to the door member, the rear end is coupled to the coupling groove of the stopper member A front door frame cap forming an engagement portion;

It is formed to be bent at a right angle so as to contact the rear inner surface edge of the frame member, the front end is formed with a coupling portion for coupling to the coupling groove of the stopper member, the rear side inner surface in the fixed coupling groove of the frame member A rear door frame cap which forms a door frame coupling protrusion for coupling;

One side portion comprises a door member formed with a protrusion coupling groove so that the door coupling protrusion formed on one side of the front door frame cap.

At this time, the front door frame cap and the rear door frame cap is configured to be separated from the front and rear side of the frame of the door frame body, the front, rear side flows along the slide groove formed inwardly of the frame body It can also be configured to adjust the width of the frame.

Looking at the detailed configuration and the embodiment of the present invention with reference to the drawings as follows.

First, referring to the configuration of the present invention with reference to the drawings, the present invention to achieve a door frame as shown in Figure 2 to 4, the door frame member 100, the stopper member 200, the front door frame cap 300, the rear Door frame cap 400, consisting of a door member 500.

At this time, the frame member 100 is installed so that the outer surface abuts on the wall (A) to form the door, the front surface forms a support piece 110 for supporting the front door frame cap 300 coupled.

On the rear surface, which is the opposite surface of the front surface on which the support piece 110 is formed, the rear door frame cap 400 is coupled to form a fixing coupling groove 120 to be fixed.

And the stopper member 200 is configured to be coupled to the inner surface of the frame member 100, but the front and rear sides of each of the front and rear surfaces so as to be fixed fixed by pinned taka pin (a) projecting the sewn portion 210 is embedded. Form.

When the pin pin (a) is put on the stamped part 210, the head of the tag pin (a) is exposed to the outside, in order to conceal the head of the ta pin (a) which is one of the main features of the present invention, the pinned part 210 One side of the) forms a coupling groove 220 is coupled one end of the door frame caps (300,400).

And the front door frame cap 300 is formed to bend at a right angle to engage in contact with the front inner surface edge of the frame member 100, the shape is '┘'.

At this time, the front door frame cap 300 is formed on the front side of the front door engaging projection 310 to be coupled to the door member 500 to form a protrusion, the rear end of the coupling groove of the stopper member (200) Coupling portion 320 to be coupled to 220 is formed.

In addition, the rear door frame cap 400 is bent at a right angle to be coupled to the rear inner surface edge of the crest frame member 100, the form is '┐'.

At this time, the front of the rear door frame cap 400 toward the front to form a coupling portion 410 for coupling to the coupling groove 220 of the stopper member 200, the rear side inner surface of the frame frame member 100 To form a crest frame coupling protrusion 420 is coupled to the fixed coupling groove (120).

And the door member 500 is formed in a conventional frame form a protrusion coupling groove 510 to one side portion is combined with the door joint coupling protrusion 310 formed on one side of the front door frame cap 300.

In addition, looking at another configuration example according to the configuration of the present invention, as shown in Figure 7, the front door frame cap 300, the front and rear sides of the frame frame member 100 is coupled to the rear door frame cap 400 (102, 103) is configured to be separated from the frame body (101).

In other words, the crest frame member 100 is divided into three parts and constitutes the front and rear side parts 102 and 103 and the crest frame body 101.

At this time, the front and rear surfaces of the frame body 101 is formed with a slide groove (101a) inwardly of the frame body 101, and the front and rear side parts (102, 103) are fitted into the slide groove (101a) sliding. The slide rods 102a and 103a are formed.

By the above configuration, the front and rear side portions 102 and 103 may flow along the slide groove 101a formed inwardly of the frame body 101 to adjust the width of the frame member.

Looking at the construction method of the variable assembly door frame according to the configuration of the present invention.

As a construction method of the variable assembly door frame, as shown in Figure 5, the installation of the crest frame (S100), the stopper member coupling process (S200), the front door frame cap coupling process (S300), the rear door frame cap coupling process (S400), door line The member joining step (S500) is made in order, first, in the crest frame installation step (S100) to install a crest frame to be installed so that the outer surface abuts on the wall to form the door.

And in the next step of the crest frame installation step (S100) in the stopper member joining step (S200) is placed on the inner side of the crest frame installed by the crest frame installation step (S100) and then put taka pins in the nailing part Join the stopper member.

And the front door frame cap coupling step (S300) in the next order after the stopper member coupling step (S200) in close contact with the front door frame cap to close to the front inner surface edge of the frame installed by the door frame installation step (S100).

At this time, the coupling portion formed at the rear end of the front door frame cap is fitted into the coupling groove of the stopper member, and the tacho pin is put on the front surface of the front door frame cap to fix the front door frame cap.

And the rear door frame cap coupling step (S300) in the next order in the rear door frame cap coupling step (S400) is tightly coupled to the rear door frame cap to close to the rear inner surface edge of the frame installed by the door frame installation process (S100). .

At this time, the coupling part formed at the front end of the rear door frame cap is fitted into the coupling groove of the stopper member, and the door frame coupling protrusion formed at the inner side of the rear side is fitted into the fixed coupling groove of the door frame member.

The rear door frame cap is fixed to the adhesive force of the adhesive after applying to the site to be bonded only by the adhesive without sticking takapin.

And in the next order in the rear door frame cap coupling step (S400) in the door member coupling step (S500) is coupled to the door member to the front surface of the front door frame cap coupled to the frame by the front door frame cap coupling step (S300).

At this time, the protrusion coupling groove of the door member is coupled so that the door coupling protrusion formed on one side of the front door frame cap is inserted, and the taco pin is driven into the side surface of the door member so as to penetrate the coupling protrusion across the protrusion coupling groove. Be sure to

The present invention is not limited to the above embodiments, and various changes can be made by any person having ordinary knowledge in the field of the present invention without departing from the gist of the present invention as claimed in the following claims. It will be said that there is a technical spirit of the present invention to the extent.

As an example, as shown in FIG. 6, the technical spirit of the present invention may be changed by anyone having ordinary knowledge in the field to which the invention belongs, such as configuring only one door. Will be said.

♠ Explanation of Main Drawing Code ♠
100: frame member 110: support piece 120: fixed coupling groove
200: stopper member 210: lock part 220: coupling groove
300: front door frame cap 310: the door coupling protrusion 320,410: the coupling portion
400: rear door frame cap 420: crest frame coupling protrusion 500: door member
510: protrusion coupling groove

Claims (3)

In constructing a variable assembly door frame,
It is installed so that the outer surface abuts on the wall to form the door, the front surface to form a support piece for supporting the front door frame cap coupled, the rear door frame cap on the rear surface of the front surface formed the support piece A crest frame member forming a fixed coupling groove to be coupled and fixed;
Coupled to the inner surface of the frame member, so that the front and rear sides of each of the front and rear so as to be fixed to the tapping pins to form a sticking portion in which the ta pin is embedded, so as to conceal the head of the takapin embedded in the nailing, one end of the door frame caps A stopper member having a coupling groove to be coupled thereto;
It is formed to be bent at a right angle to be coupled to the front inner surface edge of the frame member, the front side protruding to form a tangential engaging projection coupled to the door member, the rear end is coupled to the coupling groove of the stopper member A front door frame cap forming an engagement portion;
It is formed to be bent at a right angle so as to contact the rear inner surface edge of the frame member, the front end is formed with a coupling portion for coupling to the coupling groove of the stopper member, the rear side inner surface in the fixed coupling groove of the frame member A rear door frame cap which forms a door frame coupling protrusion for coupling;
And one side portion comprises a door member formed with a protrusion coupling groove so that the door coupling protrusion formed on one side of the front door frame cap is coupled.
The method according to claim 1,
The front door frame cap and the rear door frame cap is configured to separate the front and rear sides of the frame to be coupled to the frame body, the front and rear side flows along the slide groove formed inwardly of the frame body Variable assembly door frame, characterized in that configured to adjust the width of the frame.
In the method of constructing a variable assembly door frame,
A crest frame installation step of installing a crest frame installed so that the outer surface abuts on the wall to constitute the door;
A stopper member joining step of placing a stopper member on the inner side of the crest frame installed by the crest frame installation process and then attaching the stopper member by putting taca pins in the sewn portion;
A front door frame cap coupling step of tightly coupling the front door frame cap to finish the front inner surface edge of the door frame installed by the door frame installation process;
A rear door frame cap coupling step of tightly coupling the rear door frame cap to finish at the rear inner edge of the rear door frame installed by the door frame installation process;
The door door member coupling step of coupling the door member to the front surface of the front door frame cap coupled to the crest frame by the front door frame cap coupling process; Prefabricated door frame construction method characterized in that consisting of.
KR1020110118351A 2011-11-14 2011-11-14 Construction work methods of variable style assembly doorframe and that assembly doorframe KR20130053499A (en)

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KR1020110118351A KR20130053499A (en) 2011-11-14 2011-11-14 Construction work methods of variable style assembly doorframe and that assembly doorframe

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Application Number Priority Date Filing Date Title
KR1020110118351A KR20130053499A (en) 2011-11-14 2011-11-14 Construction work methods of variable style assembly doorframe and that assembly doorframe

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170000346U (en) 2015-07-16 2017-01-25 김영미 Plastic board for door frame
KR102180397B1 (en) 2020-03-16 2020-11-18 김기정 Door frame construction device
KR102529567B1 (en) * 2022-05-12 2023-05-04 이예찬 Variable door frame

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170000346U (en) 2015-07-16 2017-01-25 김영미 Plastic board for door frame
KR102180397B1 (en) 2020-03-16 2020-11-18 김기정 Door frame construction device
KR102529567B1 (en) * 2022-05-12 2023-05-04 이예찬 Variable door frame

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