KR20040022136A - Door for preventing fingers from putting in - Google Patents

Door for preventing fingers from putting in Download PDF

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Publication number
KR20040022136A
KR20040022136A KR1020020055914A KR20020055914A KR20040022136A KR 20040022136 A KR20040022136 A KR 20040022136A KR 1020020055914 A KR1020020055914 A KR 1020020055914A KR 20020055914 A KR20020055914 A KR 20020055914A KR 20040022136 A KR20040022136 A KR 20040022136A
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KR
South Korea
Prior art keywords
door
bolt
door frame
nut
groove
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KR1020020055914A
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Korean (ko)
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KR100475499B1 (en
Inventor
서영래
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서영래
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Priority to KR10-2002-0055914A priority Critical patent/KR100475499B1/en
Publication of KR20040022136A publication Critical patent/KR20040022136A/en
Application granted granted Critical
Publication of KR100475499B1 publication Critical patent/KR100475499B1/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
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
    • E06B7/36—Finger guards or other measures preventing harmful access between the door and the door frame
    • E06B7/367—Finger guards or other measures preventing harmful access between the door and the door frame by covering the gap between the door and the door frame at the hinge side
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/40—Physical or chemical protection
    • E05Y2800/41—Physical or chemical protection against finger injury

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Hinges (AREA)
  • Wing Frames And Configurations (AREA)

Abstract

PURPOSE: A safety door is provided to prevent the injury caused by getting fingers caught in a gap between a hinged door and a doorframe. CONSTITUTION: The safety door comprises the steps of forming one end of a hinged door(20) in the semicircular shape, forming a bolt fitting hole(21) provided with a nut groove(22) to interpose a nut(30), locating a nut(30) to the nut groove(22) and interposing a multistage bolt(31) to the bolt fitting hole(21) to form a rotary unit, forming a doorframe groove(13) on one end, and installing one end of a bolt(31) to a bearing(12) of a doorframe(10) fixed with a bearing(12).

Description

손가락 낌 방지문{Door for preventing fingers from putting in}Door for preventing fingers from putting in}

본 발명은 손가락 낌 방지문에 관한 것으로, 더욱 상세하게는, 건물의 출입구, 현관등에 설치되어 사람이 출입할시에 여닫이문과 문틀 사이에 손가락이 끼이더라도 부상을 방지하기 위하여 여닫이문 문틀 사이의 틈새를 없애주는 여닫이문에 손가락이 끼는 것을 방지하는 문에 관한 것이다.The present invention relates to a finger preventing door, and more particularly, is installed in the entrance, entrance, etc. of the building, the gap between the door door frame to prevent injuries even if a finger pinched between the door and the door frame when a person enters and exits. It is about the door to prevent your fingers from getting caught in the swinging door.

일반적으로 건물의 출입구, 현관 등에는 여닫이문이 설치되어 있는 바, 상기 여닫이문은 통상 경첩으로 여닫이문과 문틀이 조립되어 문을 열고 닫을 수 있도록 구성되었다.In general, the entrance and the entrance of the building is provided with a hinged door bar, the hinged door is configured to open and close the door by assembling the hinged door and the door frame with a hinge usually.

그리고, 경첩을 문에 고정시키기 위한 결착공을 수 개 가지고 결착공에 못을 박아 여닫이문과 문틀을 연결한다.Then, with a few binding holes for fixing the hinges to the door, nail the binding holes to connect the door and the door frame.

상기 종래의 여닫이문과 문틀을 경첩으로 연결하는 구성은 도1에 도시한 바와 같이 건축물에 고정되어 설치되어 있는 건물의 벽체에 고정설치되어 있는 문틀(6)의 일측에 경첩(1)을 고정하고 그 경첩에는 여닫이문(7)을 고정부착하므로 여닫이문(7)이 한 방향으로 열릴 수 있도록 설치되어 있다.The conventional hinge door and the door frame is hinged to one side of the door frame 6 is fixed to the wall of the building that is fixed to the building as shown in Figure 1 and the hinge Since the hinge door 7 is fixedly attached to the hinge, the door 7 is installed to be opened in one direction.

그러나 상기의 여닫이문(7)은 경첩(1)에 의해 고정되어 열리고 닫히는 관계로 도2에 도시된 바와 같이 문이 닫았을 시에는 여닫이문(7)과 문틀(6) 사이에는 공간부(ℓ1)가 생기지 않거나 공간부가 극히 좁아 지고 여닫이문(7)을 열때는 여닫이문(7)의 접촉면(8)이 문틀(6)의 내면(9)과 접촉되어 있지 않고 소정의 각도로 벌어지게 되어 여닫이문(7)과 문틀(6)에는 소정의 거리를 두고 공간부(ℓ1)가 생기게 되는데, 이 여닫이문(7)이 열려 있을시에 공간부(ℓ1)에 손가락 등이 낀 상태에서 여닫이문(7)을 닫았을시는 여닫이문(7)의 접촉면(8)이 문틀(6)의 내면(9)과의 거리가 가까워 즉 공간부(??1)가 극히 좁아지므로 여닫이문(7)에 의하여 손가락을 큰 힘으로 눌러 손가락 등에 부상을 당할 위험을 가지고 있다는 문제점이 있다.However, the opening door (7) is fixed by the hinge (1) is opened and closed in relation to the space when the door is closed as shown in Figure 2 when the door (7) and the door frame (6) (1) ) Or the space part becomes extremely narrow and when the door 7 is opened, the contact surface 8 of the door 7 is not in contact with the inner surface 9 of the door frame 6 but opens at a predetermined angle. The door 7 and the door frame 6 are provided with a space part 1 at a predetermined distance. When the door 7 is open, the door 6 is opened with a finger or the like stuck in the space 1. 7) When the contact surface (8) of the opening door (7) is closed and the distance from the inner surface (9) of the door frame (6) is close, that is, the space part (?? 1) becomes extremely narrow, Thereby, there is a problem in that there is a risk of injuring the finger by pressing the finger with a large force.

그리고 여닫이문의 수직하중으로 인하여 여닫이문의 처짐 현상이 나타나는 문제점이 있다.And there is a problem that the sag of the swing door appears due to the vertical load of the swing door.

본 발명은 상기한 문제점을 해결하기 위하여 안출한 것으로, 여닫이문의 개폐시 문과 문틀의 간격을 최소화하여 여닫이문의 개폐시 손가락 등의 끼임을 방지할 수 있을 뿐만 아니라 힌지의 사용으로 여닫이문의 처짐현상을 향상하는 것을 목적으로 한다.The present invention has been made in order to solve the above problems, by minimizing the gap between the door and the door frame when opening and closing the swing door to prevent the pinching of fingers and the like when opening and closing the swing door as well as to improve the drooping of the swing door by the use of a hinge. It aims to do it.

상기와 같은 목적은 문틀은 반원형의 홈을 만들고 여닫이문의 일단을 반원형으로 만들어 일측에는 너트를 삽입할 수 있는 너트홈이 형성된 볼트삽입홀을 만들어 너트홈에 너트를 놓고 볼트삽입홀에 볼트를 삽입하여 조립하되 볼트의 일단은 문틀에 고정설치되어 있는 베어링에 회동가능하게 설치하여 여닫이문의 개폐시 문틀과 여닫이문의 간극을 최소화함으로서 달성된다.The purpose of the above is to make the door frame is a semi-circular groove, and one end of the swinging door is made into a semi-circular shape, a bolt insertion hole formed with a nut groove for inserting a nut on one side, place the nut in the nut groove and insert the bolt into the bolt insertion hole One end of the bolt is assembled by rotating to a bearing fixed to the door frame, thereby minimizing the gap between the door frame and the door.

도1은 일반적인 여닫이문의구조를 나타낸 사시도,1 is a perspective view showing the structure of a general swing door;

도2는 종래 여닫이문의 닫고 열시의 평단면도,Figure 2 is a cross-sectional plan view of the conventional opening and closing doors,

도3은 본 발명에 따른 여닫이문 정면도,3 is a swing door front view according to the present invention;

도4는 본 발명 힌지의 분리된 상태를 나타낸 사시도,Figure 4 is a perspective view showing the separated state of the hinge of the present invention,

도5는 본 발명 힌지의 결합된 부분의 단면도,5 is a cross-sectional view of the combined portion of the hinge of the present invention;

도6a는 본 발명에 따른 문과 문틀에 힌지가 결합된 상태의 단면도,Figure 6a is a cross-sectional view of a hinge coupled to the door and the door frame according to the present invention,

도6b는 본 발명 힌지가 문과 문틀에 결합되어 개폐시의 단면도.Figure 6b is a cross-sectional view of the hinge when the present invention is coupled to the door and the door frame.

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

10 : 문틀 12 : 베어링10: door frame 12: bearing

13 : 문틀홈 20 : 여닫이문13: Door Frame Home 20: Swing Door

21 : 볼트삽입홀 22 : 너트홈21: Bolt insertion hole 22: Nut groove

23 : 연접부 30 : 너트23: connection part 30: nut

31 : 볼트31: Bolt

ℓ : 볼트의 수직이동거리ℓ: Vertical travel distance of bolt

ℓ 1 : 종래 여닫이문의 개폐시 공간부의 간격ℓ 1: Spacing of the space part during opening and closing of the conventional swing door

ℓ 2 : 본 발명에 따른 여닫이문의 개폐시 연접부의 간격ℓ 2: spacing of the joint at the opening and closing of the sliding door according to the present invention

본 발명은 상기한 문제점을 해결하기 위해 여닫이문과 문틀이 연결되는 단부를 반원형으로 만들고 문틀의 연결단부에 문틀홈을 구성한 문틀과, 볼트와 너트로체결되도록 구성되는바, 이하 첨부도면에 의하여 상세히 설명하면 다음과 같다.The present invention is to solve the problem described above is formed in the semi-circular end of the door and the door frame is connected to the door frame and the bolt and nut, which is configured to be connected to the connection end of the door frame, will be described in detail by the accompanying drawings Is as follows.

도3은 본 발명에 따른 여닫이문 정면도이고, 도4는 본 발명 힌지의 분리된 상태를 나타낸 사시도이며, 도5는 본 발명 힌지의 결합된 부분의 단면도이고, 도6은 본 발명에 따른 문과 문틀에 힌지가 결합된 상태의 개페시의 단면도로서Figure 3 is a front door according to the present invention, Figure 4 is a perspective view showing a separated state of the hinge of the present invention, Figure 5 is a cross-sectional view of the combined portion of the hinge of the present invention, Figure 6 is a door and door frame according to the present invention As a cross-sectional view of the opening when the hinge is coupled to

본 발명은 여닫이문(20)의 일단은 반원형으로 하고 상하에는 중간부에 너트(30)를 삽입할 수 있는 너트홈(22)이 형성된 볼트삽입홀(21)이 만들어 너트홈(22)에 너트(30)를 위치시켜 볼트삽입홀(21)에는 다단으로 된 볼트(31)를 삽입하여 회전부를 만들어 일단에 반구형의 문틀홈(13))이 형성되고 상하에 베어링(12)을 고정설치한 문틀(10)의 베어링(12)에 볼트(31)의 일단이 회동가능하게 설치되는 손가락 낌 방지문방지문에 관한 것이다.According to the present invention, one end of the swinging door 20 has a semicircular shape, and a bolt insertion hole 21 having a nut groove 22 for inserting the nut 30 in the middle portion thereof is formed in the upper and lower portions thereof so that the nut is inserted into the nut groove 22. The door frame in which the hemisphere-shaped door frame groove 13 is formed at one end by placing the bolt 31 having a multi-stage in the bolt insertion hole 21 by placing the bolt 30 at the end thereof, and fixing the bearing 12 at the upper and lower sides thereof. It relates to a finger-fingered door lock in which one end of the bolt 31 is rotatably installed on the bearing 12 of (10).

여닫이문(20)과 문틀(10)의 연접부(23)는 반원형으로 형성된다. 문틀(10)에는 손낌 방지를 위한 최소한의 문틀홈(13)이 파여져 있다.The hinge 23 of the door 20 and the door frame 10 is formed in a semicircular shape. The door frame 10 is dug a minimum door frame groove 13 for preventing hand.

여닫이문(20)의 볼트삽입홀(21)은 여닫이문(20)의 상하에 만들되 볼트(31)를 볼트삽입홀(21)에 삽입하였을시에 여닫이문(20)과 함께 동기하여 회동할 수 있도록 볼트(31) 단면도와 같이 모양과 같은 다각형(도면은 육각형으로 도시함)으로 만들어 여닫이문(20)의 수직방향으로 형성된다.The bolt insertion hole 21 of the swing door 20 may be made above and below the swing door 20, and may rotate in synchronization with the swing door 20 when the bolt 31 is inserted into the bolt insertion hole 21. In order to form a polygonal shape (shown in the hexagon) as shown in the cross-sectional view of the bolt 31 so as to be formed in the vertical direction of the swing door 20.

또 볼트삽입홀(21)의 깊이는 도5에 도시된 바와 같이 볼트(31)를 볼트삽입홀(21)에 삽입시켰을시에 볼트(31)의 일단이 여닫이문(20)의 하면과 일치될 수 있는 깊이로 만들고 여닫이문(20)을 문틀(10)에 고정할시에는 너트(30)를 회전시켜 문틀(10)의 베어링(12)에 삽입시키기 위하여서는 볼트를 하부로 이동하는볼트의 수직이동거리(ℓ )만큼의 깊이를 만들어야 한다.In addition, the depth of the bolt insertion hole 21, when the bolt 31 is inserted into the bolt insertion hole 21, as shown in Figure 5, one end of the bolt 31 is to coincide with the lower surface of the opening door (20). To the depth of the bolt and to fix the door 20 to the door frame 10 to rotate the nut 30 to insert into the bearing 12 of the door frame 10 to the vertical of the bolt to move the bolt downward The depth of the moving distance (ℓ) should be made.

또한, 볼트(31)는 볼트삽입홀(21)에 삽입하고 너트(30)에 의해 여닫이문(20)에 고정시키고 볼트(31)이 회전축의 기능을 하여 회동가능하게 설치되기 위하여 너트홈(22)이 구성된다.In addition, the bolt 31 is inserted into the bolt insertion hole 21 and fixed to the opening door 20 by the nut 30, and the nut groove 22 to be installed to be rotatable by the bolt 31 functions as a rotating shaft. ) Is configured.

문틀(10)에는 여닫이문(20)에 고정설치한 볼트(31)의 일단을 삽입하여 회전축의 기능을 하면서 회동가능할 수 있도록 베어링(12)이 설치된다.The bearing 12 is installed in the door frame 10 so as to be rotatable while inserting one end of the bolt 31 fixed to the swing door 20 to function as a rotating shaft.

여닫이문(20)의 문틀(10)과 접촉되는 연접부(23)는 도4 및 6도에서 도시된 바와 같이 문틀(10)과의 연접부(23)가 반원형으로 형성되고 문틀(10)의 단부 또한 반원형으로 형성된다.As shown in FIGS. 4 and 6, the connecting portion 23 in contact with the door frame 10 of the sliding door 20 has a connecting portion 23 formed in a semi-circular shape and is formed in the semi-circular shape of the door frame 10. The ends are also formed in semicircles.

문틀(10)의 반원형 단부는 도 4 및 6 에 도시된바와 같이 여닫이문(20)이 열릴 수 있도록 4분의1 원의 형태로 형성된다.The semicircular end of the door frame 10 is formed in the form of a quarter circle so that the door 20 can be opened as shown in FIGS. 4 and 6.

따라서, 상기와 같이 구성되는 여닫이문(20)과 문틀(10)은 도 5에 도시된 바와 같이 너트(30)를 너트홈(22)에 넣고 볼트(31)를 볼트삽입홀(21)에 끼워서 볼트(31)와 너트(30)를 결합한다.Therefore, the opening door 20 and the door frame 10 configured as described above are inserted into the nut groove 22 and the nut 31 into the bolt insertion hole 21 as shown in FIG. The bolt 31 and the nut 30 are combined.

너트(30)는 볼트(31)가 여닫이문(20)으로부터 이탈하지 못하도록 하면서 볼트(31)의 높이를 조절하기 위한 회전을 위하여 너트(30)가 헛돌지 않도록 너트(30)로 구성한다.The nut 30 is configured as a nut 30 so that the nut 30 does not drift for rotation to adjust the height of the bolt 31 while preventing the bolt 31 from escaping from the sliding door 20.

여닫이문(20)의 상하에 볼트(31) 및 너트(30)를 각각 같은 방법으로 연결한 후 여닫이문(20)을 문틀(10)에 끼워 맞춘다.After connecting the bolt 31 and the nut 30 in the same way up and down the swing door 20, and fit the swing door 20 to the door frame 10.

이때 볼트삽입홀(21)에 삽입고정되는 볼트(31)의 끝부분이 문틀(10)의 베어링(12) 구멍에 맞도록 위치를 확인한 후 너트(30)를 돌려 높이를 조절하여 문틀(10)에 여닫이문(20)을 고정시킨다.At this time, after confirming the position of the end of the bolt 31 inserted into the bolt insertion hole 21 to fit the bearing 12 hole of the door frame 10, turn the nut 30 to adjust the height of the door frame 10 Fasten the door 20 to the door.

이때 높이 조절은 도5에 도시된 바와 같이 너트(30)를 원하는 쪽으로 돌려 상기 볼트(31)는 볼트삽입홀(21)을 따라 상하(ℓ )로 이동됨으로써 여닫이문(20)의 높이를 맞출 수가 있다.At this time, as shown in Figure 5 by turning the nut 30 to the desired direction, the bolt 31 is moved up and down (ℓ) along the bolt insertion hole 21 can be adjusted to the height of the swing door (20). have.

이 때 시공자는 볼트(31)와 여닫이문(20)이 같이 회동하므로 너트(30)만 돌려서 높이를 맞출 수 있어 시공시간을 절약할 수 있다.At this time, the contractor can rotate the bolt 31 and the swinging door 20 together to adjust the height by turning only the nut 30 can save the construction time.

손 낌방지 기능은 여닫이문(20)과 문틀(10)이 접촉되는 연접부(23)의 단면이 반원형으로 구성하여 여닫이문(20)의 개폐시에 여단이문(20)의 연결되는 연접부(23)가 문틀(10)의 연결단부에 간극이 거의 없는 맞닿아 있는 상태로 회동하기 때문에 여닫이문(20)의 개폐시 연접부(23)의 간격(ℓ2)으로 최소화하여 여닫이문(20)의 개폐시에 손가락등이 끼일 수 없게 된다.Hand-holding function is composed of a semi-circular cross section of the connecting portion 23 in contact with the hinge door 20 and the door frame 10 is connected to the brigade door 20 at the opening and closing of the hinge door 20 ( Since 23 is rotated in a state in which there is almost no gap in the connecting end of the door frame 10, the opening and closing of the hinge door 20 is minimized to a distance (l2) of the connecting part 23 of the door 20. Fingers are not caught in opening and closing.

또한 연접부(23)의 간격을 최소화하였음에도 불구하고 여닫이문(20)의 개폐시 연접부의 간격(ℓ2)으로 인한 손가락등의 끼임 방지를 위해 여닫이문(20)과 연접하는 문틀(10)의 단부에 손가락 두께보다 큰 유격의 문틀홈(13)을 구성하여 여닫이문(20)을 최대한 열었을때에도 손가락 등이 끼이지 않게 하는 구조를 가진다.In addition, the end of the door frame 10 in contact with the swing door 20 in order to prevent the pinch of the fingers, etc. due to the gap (l2) of the hinge door when opening and closing the hinge door 20 in spite of minimizing the gap of the joint 23. By constructing a door frame groove 13 having a greater than the thickness of the finger to have a structure such that the fingers are not pinched even when the opening door 20 as much as possible.

이상에서 설명한 바와 같이 여닫이문과 문틀의 접촉되는 연접부를 반원형으로 만들어 여닫이문을 열고 닫을시 문틀과 여닫이문의 연접부의 공간을 최소화하여 여닫이문의 개폐시 손가락 등의 끼임을 방지할 수 있는 효과가 있고, 또한 볼트삽입홀을 조립후 여닫이문을 문틀에 체결시 너트를 돌려서 시공할 수 있으므로 시공시간을 단축할 수 있다.As described above, by making the semi-circular contact portion between the door and the door frame, it minimizes the space between the door frame and the door when the door is opened and closed, thereby preventing the pinching of the finger when the door is opened and closed. After assembling the bolt insertion hole, when the door is fastened to the door frame, the construction time can be reduced by turning the nut to shorten the construction time.

Claims (3)

여닫이문(20)의 일단은 반원형으로 하고 상하에는 중간부에 너트(30)를 삽입할 수 있는 너트홈(22)이 형성된 볼트삽입홀(21)이 만들어 너트홈(22)에 너트(30)를 위치시켜 볼트삽입홀(21)에는 다단으로 된 볼트(31)를 삽입하여 회전부를 만들어 일단에 반구형의 문틀홈(13))이 형성되고 상하에 베어링(12)을 고정설치한 문틀(10)의 베어링(12)에 볼트(31)의 일단이 회동가능하게 설치되는 것을 특징으로 하는 손가락 끼임 방지 장치.One end of the door 20 is made into a semi-circular shape and a bolt insertion hole 21 having a nut groove 22 for inserting the nut 30 in the upper and lower portions thereof is formed to make the nut 30 in the nut groove 22. The bolt inserting hole 21 is inserted into the bolt 31 having a multi-stage position to make a rotating part and a hemispherical door frame groove 13 is formed at one end thereof, and the door frame 10 is fixed to the upper and lower bearings 12. Finger pinching prevention device, characterized in that one end of the bolt (31) is rotatably installed in the bearing (12) of the. 제 1 항에 있어서,The method of claim 1, 여닫이문(20)의 연접부를 반원형으로 만들고 문틀(10) 단부 또한 반원형으로 형성하는 것을 특징으로 하는 손가락 끼임 방지 장치.Finger joint prevention device, characterized in that the connecting portion of the sliding door (20) to make a semi-circular shape and the end of the door frame (10) is also semi-circular. 제 1 항에 있어서,The method of claim 1, 문틀(10)의 여닫이문(20)과 연접하는 문틀(10)에는 문틀홈(13)을 형성하는 것을 특징으로 하는 손가락 끼임 방지 장치.Finger frame prevention device, characterized in that the door frame groove 13 is formed in the door frame 10 in contact with the sliding door 20 of the door frame 10.
KR10-2002-0055914A 2002-09-13 2002-09-13 Door for preventing fingers from putting in KR100475499B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100889826B1 (en) * 2008-02-15 2009-03-20 노승현 Safety door
CN106907094A (en) * 2017-04-13 2017-06-30 江苏华强新能源科技有限公司 A kind of blast fence door

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Publication number Priority date Publication date Assignee Title
KR200452676Y1 (en) * 2008-07-14 2011-03-16 대보기연(주) Sterilizing drier for kitchen knife
KR200448664Y1 (en) 2009-10-29 2010-05-06 한동수 Finger protection device
KR101709447B1 (en) 2016-10-17 2017-02-22 김현정 Hand insertation preventing type hinge apparatus for a door
KR20200093209A (en) 2019-01-28 2020-08-05 동성산업 주식회사 Door with function of preventing hand insertation
KR20230025730A (en) 2021-08-16 2023-02-23 김덕호 Hand insertion preventing type door system
KR20230068746A (en) 2021-11-11 2023-05-18 김덕호 Hand insertion preventing type door system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100889826B1 (en) * 2008-02-15 2009-03-20 노승현 Safety door
CN106907094A (en) * 2017-04-13 2017-06-30 江苏华强新能源科技有限公司 A kind of blast fence door

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