KR101122283B1 - Assembled stairs construction - Google Patents

Assembled stairs construction Download PDF

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Publication number
KR101122283B1
KR101122283B1 KR1020110096508A KR20110096508A KR101122283B1 KR 101122283 B1 KR101122283 B1 KR 101122283B1 KR 1020110096508 A KR1020110096508 A KR 1020110096508A KR 20110096508 A KR20110096508 A KR 20110096508A KR 101122283 B1 KR101122283 B1 KR 101122283B1
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KR
South Korea
Prior art keywords
stepping
elastic support
stairs
inner space
support member
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KR1020110096508A
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Korean (ko)
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김흥수
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(주)이명이앤씨건축사사무소
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Priority to KR1020110096508A priority Critical patent/KR101122283B1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/104—Treads
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
    • E04F11/035—Stairways consisting of a plurality of assembled modular parts without further support
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/104—Treads
    • E04F2011/1046—Miscellaneous features of treads not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)

Abstract

PURPOSE: Prefabricated stairs for construction are provided to reduce the fatigue of a person who uses the stairs by absorbing the load of the person through elastic support members. CONSTITUTION: Prefabricated stairs for construction comprise a backing unit(10), stepping units(20), elastic support members(30), supports(40), and step boards(50). The backing unit has an inclined plane. Fixing grooves(11) are formed on the inclined plane. Each stepping unit has an insertion unit(21) and an insertion groove. The insertion units are inserted into the fixing grooves of the backing unit. The elastic support members are inserted into the insertion grooves of the stepping units. Each support has a through hole(41). Parts of the elastic support members penetrate the through holes. Each step board has insertion holes and an anti-slip unit(52). The tops of the elastic support members are inserted into the insertion holes.

Description

건축용 조립식 계단{ASSEMBLED STAIRS CONSTRUCTION}Building Prefab Stairs {ASSEMBLED STAIRS CONSTRUCTION}

본 발명은 조립 및 해제가 용이하고, 계단을 오르거나 내려가는 사람들의 하중을 흡수하여 사람들의 계단을 이용하는 사람들의 피로감을 덜어줄 수 있도록 한 건축용 조립식 계단에 관한 것이다.The present invention relates to a building prefabricated staircase that is easy to assemble and release, to absorb the load of people going up or down the stairs to relieve the fatigue of people who use the people's stairs.

계단(階段)은 사람이 오르내리기 위하여 건물이나 비탈에 만든 층층대로, 각종건물에 시공되는 계단은 철골조와 목재 등으로 시공되는 것과 또는 철근콘크리트로 시공되는 것으로 분류할 수가 있으며, 대개의 경우는 후자인 철근콘크리트로 시공하게 되는 것이 보편적이다.Stairs can be classified as floors made on buildings or slopes for people to climb up and down. Stairs constructed in various buildings can be classified into steel frames and timbers, or reinforced concrete. It is common to construct with reinforced concrete.

이런 계단을 만들기 위해서는 현장에 거푸집을 설치한 후 콘크리트를 타설하고, 미끄럼을 방지하기 위하여 계단의 앞모서리에 논슬립을 부착하며, 측단에는 계단난간을 직립고정시켜서 이루어진다.In order to make such a staircase, after the formwork is installed on the site, concrete is poured, and a nonslip is attached to the front edge of the stairway to prevent slippage, and the stair railings are fixed upright at the side ends.

그러나, 이런 종래의 계단은 만들기 위한 제반 공정이 복잡하고, 공기도 길며, 많은 작업인원을 필요로 하기 때문에 시공비도 많이 소요되는 문제점이 있다.However, such a conventional step has a problem in that the construction process is complicated, the air is long, and a lot of construction costs are required because it requires a large number of workers.

상기한 종래기술의 문제점을 해결하기 위해 등록특허 "제10-0638797호"가 제안된바 있다.Patent No. 10-0638797 has been proposed to solve the above problems of the prior art.

상기한 선행기술은 수직면과 수평면이 반복적으로 이루어지고 양단에는 체결홀과 배수홈을 갖고 콘크리트 계단 상하단에 고정앙카로 체결고정되는 연결판이 형성되되, 수평면은 일측으로 구배져 하측으로 경사면을 갖고 저면 일측단에 배수홀을 갖는 다수개의 삽입요부가 횡방향으로 형성되는 판체인 계단플레이트와;The prior art has a vertical plane and a horizontal plane is made repeatedly and the connecting plate is formed on both ends having a fastening hole and a drain groove and fastened and fixed by fixing anchors on the upper and lower ends of the concrete stairs, the horizontal plane is sloped to one side and has an inclined surface to the bottom side one side A step plate which is a plate body in which a plurality of insertion recesses having a drainage hole at the end are formed in the transverse direction;

상하로 관통된 다수개의 배수홀을 갖고 상기 계단플레이트의 경사면 내측에 충격흡수프링에 의해 탄발되게 안착되는 계단바가 힌지에 의해 다수개 축결합되되 선단부에는 논슬립이 결합된 체결식 계단패널과;A fastening stair panel having a plurality of drainage holes penetrated up and down and coupled to a plurality of stair bars by hinges, the stair bar being seated elastically by an impact absorbing spring inside the inclined surface of the staircase plate;

상기 계단플레이트의 경사면을 갖는 삽입요부를 일측단에서 막아 밀폐시키는 측면배수마개와;A side drain plug for closing and sealing an insertion recess having an inclined surface of the stair plate at one end;

상기 계단플레이트의 저면 일측단 배수홀 하부에 연통되어 하부로 배수 유도되는 배수관을 구비하여 구성되며, 이와 같이 구성된 선행기술은 계단을 만들기 위한 제반 공정이 간단하게 이루어져, 적은 작업인원으로 손쉽게 조립하여 계단시공이 가능한 이점이 있으나, 체결식 계단패널은 합성수지나 금속재질로 이루어져 계단을 오르거나 내려가는 사람들이 디딜 경우 피로도를 부가시키며, 선행기술에 적용된 충격흡수스프링의 구조로는 사용자의 하중에 의해 전달되는 충격량을 효율적으로 흡수 및 감소시키에는 무리가 있는 문제점이 있다.
It is configured to include a drain pipe connected to the bottom of one side end drain hole of the stair plate and drained to the bottom, the prior art configured in this way is a simple process for making a staircase, easily assembled with a small number of workers Although there is an advantage that construction is possible, the fastening stairs panel is made of synthetic resin or metal material and adds fatigue when people step up or down the stairs, and the structure of the shock absorbing spring applied in the prior art is transmitted by the user's load. There is an unreasonable problem in efficiently absorbing and reducing the impact amount.

본 발명은 상기한 종래기술의 문제점을 해결하기 위하여 안출된 것으로서, 조립 및 해제가 용이하고, 계단을 오르거나 내려가는 사람들의 하중을 흡수하면서 디딤력이 감소될 수 있도록 하므로서, 계단을 이용하는 사람들의 피로감을 덜어줄 수 있도록 한 건축용 조립식 계단을 제공하는데 그 목적이 있다.
The present invention has been made to solve the problems of the prior art, it is easy to assemble and release, so that the stepping force can be reduced while absorbing the load of people going up or down stairs, fatigue of people using the stairs The purpose is to provide a building prefabricated staircase to relieve the problem.

상기한 목적과제를 달성하기 위한 본 발명의 수단은, 경사면을 갖도록 형성되며, 상기 경사면에 고정홈이 상,하 방향으로 간격을 두고 형성되는 받침부와; 저면에는 상기 받침부의 고정홈에 삽입고정되는 삽입부가 형성되어 상기 받침부의 경사면에 결합되고, 내부공간의 바닥면에는 삽입홈이 간격을 두고 형성된 디딤부와; 상기 디딤부의 삽입홈에 각각 삽입고정되는 탄성지지부재와; 양측면이 상기 디딤부의 내부공간에 설치되고, 상기 탄성지지부재의 일부가 관통되는 관통홀이 상,하 방향으로 관통형성된 서포트와; 저면에 상기 탄성지지부재의 상부가 삽입고정되는 삽입홀이 간격을 두고 형성되고, 상기 디딤부의 내부공간 상부를 밀폐하며, 상단에 미끄럼 방지부가 구비된 디딤판;으로 이루어져 구성되며, 상기 받침부의 고정홈은 자성을 갖도록 형성되고, 상기 디딤부의 삽입부는 상기 받침부의 고정홈과 반대 자성을 갖도록 형성되어, 상기 삽입부가 고정홈에 자성을 통해 부착되도록 한 것을 특징으로 한다.
Means of the present invention for achieving the above object, the support portion is formed to have an inclined surface, the fixing groove is formed on the inclined surface at intervals in the vertical direction; A bottom portion having an insertion portion inserted into and fixed in the fixing groove of the support portion, coupled to an inclined surface of the support portion, and a stepping portion formed at intervals between insertion grooves on a bottom surface of the inner space; An elastic support member inserted into and fixed to the insertion groove of the stepping portion; A support having both sides installed in the inner space of the stepping portion and having a through hole through which a portion of the elastic support member penetrates in an up and down direction; Comprising the insertion hole is inserted into the upper portion of the elastic support member is fixed to the bottom surface, sealing the upper portion of the inner space of the stepping portion, and comprises a stepping plate with a non-slip portion at the top; Silver is formed to have a magnetic, and the insertion portion of the step portion is formed to have a magnetic opposite to the fixing groove of the support portion, characterized in that the insertion portion is attached to the fixing groove through the magnetic.

본 발명에 따른 조립 및 해제가 용이하고, 계단을 오르거나 내려가는 사람들의 하중을 흡수하면서 디딤력이 감소될 수 있도록 하므로서, 계단을 이용하는 사람들의 피로감을 덜어줄 수 있는 효과가 있다.
It is easy to assemble and release according to the present invention, so that the stepping force can be reduced while absorbing the load of people going up or down the stairs, there is an effect that can reduce the fatigue of people using the stairs.

도 1은 본 발명에 따른 건축용 조립식 계단의 분해 사시도.
도 2는 본 발명에 따른 건축용 조립식 계단의 단면도.1 is an exploded perspective view of a prefabricated staircase for building according to the present invention.
Figure 2 is a cross-sectional view of the prefabricated building stairs in accordance with the present invention.

이하 본 발명의 바람직한 실시 예를 첨부된 도면을 참조하여 함께 상세히 설명하면 더욱 명백해 질것이다.
Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be more apparent.

도 1은 본 발명에 따른 건축용 조립식 계단의 분해 사시도이고, 도 2는 본 발명에 따른 건축용 조립식 계단의 단면도이다.
1 is an exploded perspective view of a prefabricated staircase for building according to the present invention, and FIG. 2 is a cross-sectional view of a prefabricated staircase for building according to the present invention.

상기 도 1 및 도 2에 도시된 바와 같이, 본 발명에 따른 건축용 조립식 계단은 받침부(10)와, 디딤부(20)와, 탄성지지부재(30)와, 서포트(40)와, 디딤판(50)으로 이루어져 구성된다.
As shown in FIG. 1 and FIG. 2, the prefabricated stairs for building according to the present invention includes a supporting part 10, a stepping part 20, an elastic support member 30, a support 40, and a stepping plate ( It consists of 50).

상기 받침부(10)는 경사면을 갖는 직삼각형 형상으로 형성되고, 상기 경사면에 고정홈(11)이 상,하 방향으로 간격을 두고 형성된다.The support 10 is formed in a rectangular shape having an inclined surface, the fixing groove 11 is formed on the inclined surface at intervals in the vertical direction.

상기 디딤부(20)는 저면에 상기 받침부(10)의 고정홈(11)에 삽입고정되는 삽입부(21)가 형성되어 상기 받침부(10)의 경사면에 결합되고, 내부공간의 바닥면에 삽입홈(22)이 간격을 두고 형성된다.
The tread portion 20 has an insertion portion 21 formed at a bottom thereof and fixed to the fixing groove 11 of the support portion 10, and is coupled to an inclined surface of the support portion 10, and has a bottom surface of an inner space. Insertion grooves 22 are formed at intervals.

또한, 상기 받침부(10)의 고정홈(11)은 자성을 갖도록 형성되고, 상기 디딤부(20)의 삽입부(21)는 상기 받침부(10)의 고정홈(11)과 반대 자성을 갖도록 형성되며, 상기 디딤부(20)의 삽입부(21)는 받침부(10)의 고정홈(11)에 자성을 통해 부착됨으로 인해 상기 디딤부(20)를 받침부(10)에 간편하고 안정적으로 결합할 수 있다.
In addition, the fixing groove 11 of the supporting portion 10 is formed to have a magnetic, the insertion portion 21 of the stepping portion 20 is opposite to the fixing groove 11 of the supporting portion 10 It is formed to have, and the insertion portion 21 of the stepping portion 20 is attached to the fixing groove 11 of the base portion 10 through the magnetic, so that the stepping portion 20 is easy to the base portion 10 Can be combined stably.

상기 탄성지지부재(30)는 상기 디딤부(20)의 삽입홈(22)에 각각 삽입고정되어 계단을 오르거나 내려가는 사람들의 하중을 흡수하므로서, 계단을 이용하는 사람들의 피로감을 덜어줄 수 있다.
The elastic support member 30 is fixed to the insertion groove 22 of the stepping portion 20, respectively, to absorb the load of people going up or down the stairs, thereby reducing the fatigue of people using the stairs.

상기한 탄성지지부재(30)는 케이싱(31)과, 스프링(32)과, 승강부(33)로 이루어져 구성된다.The elastic support member 30 is composed of a casing 31, a spring 32, and the lifting unit 33.

상기 케이싱(31)은 상부가 개방되고 내부공간이 형성되며, 상기 스프링(32)은 상기 케이싱(31)의 내부공간에 설치되며, 상기 승강부(33)는 상기 스프링(32)의 상단에 용접을 통해 설치되어 상기 스프링(32)과 함께 케이싱(31)의 내부공간에서 승강되며, 상부에 상기 케이싱(31)의 상단에 걸쳐지는 걸림턱(34)이 형성되고, 상기 걸림턱(34)의 상단에는 디딤판(50)의 삽입홀(51)에 끼움고정되는 삽입돌기(35)가 형성된다.
The casing 31 has an open upper portion and an inner space is formed, the spring 32 is installed in the inner space of the casing 31, the lifting portion 33 is welded to the upper end of the spring 32 Is installed through the spring 32 and the elevating in the inner space of the casing 31, the engaging jaw 34 is formed on the upper end of the casing 31 is formed, the engaging jaw (34) of The upper end is formed with an insertion protrusion 35 is fitted into the insertion hole 51 of the tread plate 50.

상기 서포트(40)는 양측면이 상기 디딤부(20)의 내부공간에 설치되고, 상기 탄성지지부재(30)의 일부가 각각 관통되는 관통홀(41)이 상,하 방향으로 관통형성된다.Both sides of the support 40 are installed in the inner space of the tread portion 20, and the through holes 41 through which a part of the elastic support member 30 penetrates are formed to penetrate upward and downward.

상기 서포트(40)는 상기 탄성지지부재(30)가 디딤판(50)을 통해 전달되는 계단을 이용하는 사람들의 하중에 의해 휘어지지 않고 그 상태를 지속적으로 유지할 수 있도록 한다.
The support 40 allows the elastic support member 30 to continuously maintain its state without being bent by the load of the people using the stairs transferred through the tread plate 50.

상기 디딤판(50)은 저면에 상기 탄성지지부재(30)를 구성하는 승강부(33)의 삽입돌기(35)가 끼움고정되는 삽입홀(51)이 간격을 두고 형성되어 상기 승강부(33)의 삽입돌기(35)가 삽입홈(22)에 끼움고정됨으로 인해 상기 디딤부(20)의 내부공간 상부를 밀폐하며, 상단에 미끄럼 방지부(52)가 구비되어 계단을 이용하는 사람들이 미끄러지지 않고 안정되게 이용할 수 있도록 한다.
The tread plate 50 is formed at intervals between the insertion hole 51 to which the insertion protrusion 35 of the elevating portion 33 constituting the elastic support member 30 is fixed at intervals, and thus the elevating portion 33 is disposed. Since the insertion protrusion 35 of the insertion groove 22 is fixed, the upper part of the inner space of the stepping portion 20 is sealed, and an anti-slip portion 52 is provided at the top thereof so that people using the stairs are not slippery and stable. Make it available.

상기와 같이 구성된 본 발명에 따른 건축용 조립식 계단의 작동을 설명하면 다음과 같다.
Referring to the operation of the building prefabricated stairs according to the present invention configured as described above are as follows.

건축물의 내부에서 층간 이동을 하고자 사용자가 계단을 딛게 되면 디딤판(50)은 탄성지지부재(30)에 의해 일정거리 하강하면서 사용자의 하중을 흡수하게 되어 계단을 이용하는 사람들의 피로감을 덜어주게 되고, 사용자가 발을 떼게 되면 상기 디딤판(50)은 탄성지지부재(30)의 복원력에 의해 원래의 위치로 복원된다.When the user steps on the stairs to move between floors inside the building, the tread plate 50 descends by a certain distance by the elastic support member 30 to absorb the user's load, thereby reducing the fatigue of people using the stairs. When the wig is released, the tread plate 50 is restored to its original position by the restoring force of the elastic support member 30.

또한, 승강부(33)는 사용자의 하중에 의해 하강되는 디딤판(50)과 함께 하강되는 과정에서 걸림턱(34)이 케이싱(31)의 상단에 맞닿게 되면 하강을 멈춰 상기 디딤판(50)이 과도하게 하강되는 것을 방지한다.
In addition, the elevating part 33 stops the lowering when the locking step 34 contacts the upper end of the casing 31 in the process of descending together with the stepping plate 50 lowered by the load of the user. To prevent excessive descent.

10 : 받침부 11 : 고정홈
20 : 디딤부 21 : 삽입부
22 : 삽입홈 30 : 탄성지지부재
31 : 케이싱 32 : 스프링
33 : 승강부 34 : 걸림턱
35 : 삽입돌기 40 : 서포트
41 : 관통홀 50 : 디딤판
51 : 삽입홀 52 : 미끄럼 방지부10: support portion 11: fixed groove
20: step portion 21: insertion portion
22: insertion groove 30: elastic support member
31: Casing 32: Spring
33: lifting section 34: locking jaw
35: insertion protrusion 40: support
41: through hole 50: tread
51: insertion hole 52: slip prevention portion

Claims (2)

경사면을 갖도록 형성되며, 상기 경사면에 고정홈(11)이 상,하 방향으로 간격을 두고 형성되는 받침부(10)와;
저면에는 상기 받침부(10)의 고정홈(11)에 삽입고정되는 삽입부(21)가 형성되어 상기 받침부(10)의 경사면에 결합되고, 내부공간의 바닥면에는 삽입홈(22)이 간격을 두고 형성된 디딤부(20)와;
상기 디딤부(20)의 삽입홈(22)에 각각 삽입고정되는 탄성지지부재(30)와;
양측면이 상기 디딤부(20)의 내부공간에 설치되고, 상기 탄성지지부재(30)의 일부가 관통되는 관통홀(41)이 상,하 방향으로 관통형성된 서포트(40)와;
저면에 상기 탄성지지부재(30)의 상부가 삽입고정되는 삽입홀(51)이 간격을 두고 형성되고, 상기 디딤부(20)의 내부공간 상부를 밀폐하며, 상단에 미끄럼 방지부(52)가 구비된 디딤판(50);으로 이루어져 구성되며,
상기 받침부(10)의 고정홈(11)은 자성을 갖도록 형성되고, 상기 디딤부(20)의 삽입부(21)는 상기 받침부(10)의 고정홈(11)과 반대 자성을 갖도록 형성되어, 상기 삽입부(21)가 고정홈(11)에 자성을 통해 부착되도록 한 것을 특징으로 하는 건축용 조립식 계단.It is formed to have an inclined surface, the support groove 10 is formed on the inclined surface at intervals in the vertical direction, the support portion 10;
The bottom surface is formed with an insertion portion 21 is inserted into the fixing groove 11 of the support portion 10 is coupled to the inclined surface of the support portion 10, the insertion groove 22 is formed on the bottom surface of the inner space A stepping portion 20 formed at intervals;
An elastic support member 30 inserted into and fixed to the insertion groove 22 of the stepping portion 20;
Both sides are installed in the interior space of the stepping portion 20, the support 40 through which the through-hole 41 through which a portion of the elastic support member 30 penetrates in the vertical direction;
Insertion holes 51 for inserting and fixing the upper portion of the elastic support member 30 on the bottom surface are formed at intervals, sealing the upper portion of the inner space of the stepping portion 20, the anti-slip portion 52 on the top Consists of consisting of a stepping plate 50 provided,
The fixing groove 11 of the supporting portion 10 is formed to have a magnetic, and the insertion portion 21 of the stepping portion 20 is formed to have a magnetic opposite to the fixing groove 11 of the supporting portion 10. Prefabricated stairs, characterized in that the insertion portion 21 is attached to the fixing groove 11 through the magnetic. 제 1항에 있어서,
상기 탄성지지부재(30)는 상부가 개방되고 내부공간이 형성된 케이싱(31)과;
상기 케이싱(31)의 내부공간에 설치되는 스프링(32)과;
상기 스프링(32)의 상단에 설치되어 상기 스프링(32)과 함께 케이싱(31)의 내부공간에서 승강되며, 상부에 상기 케이싱(31)의 상단에 걸쳐지는 걸림턱(34)과, 상기 디딤판(50)의 삽입홀(51)에 끼움고정되는 삽입돌기(35)가 형성된 승강부(33);로 이루어져 구성되는 것을 특징으로 하는 건축용 조립식 계단.The method of claim 1,
The elastic support member 30 includes a casing 31 having an upper portion open and an inner space formed therein;
A spring 32 installed in the inner space of the casing 31;
It is installed on the upper end of the spring 32 and is elevated in the inner space of the casing 31 together with the spring 32, the engaging jaw 34 and the stepping plate (34) over the upper end of the casing 31 Building prefabricated staircase, characterized in that consisting of; the lifting portion 33 is formed with an insertion protrusion 35 is fixed to the insertion hole 51 of the 50.
KR1020110096508A 2011-09-23 2011-09-23 Assembled stairs construction KR101122283B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017065469A1 (en) * 2015-10-13 2017-04-20 김태중 Elastic foothold for stairs
CN111441546A (en) * 2020-04-10 2020-07-24 龚大娇 Indoor assembled stair of building

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR900018485A (en) * 1989-05-31 1990-12-21 이근희 Prefabricated staircase block and construction method
KR100564791B1 (en) 2005-12-27 2006-03-28 (주)태경감리공단건축사사무소 Safe stairs of houses
JP2007146635A (en) 2005-10-31 2007-06-14 Hiromi Fujii Stairs ascending/descending assisting apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR900018485A (en) * 1989-05-31 1990-12-21 이근희 Prefabricated staircase block and construction method
JP2007146635A (en) 2005-10-31 2007-06-14 Hiromi Fujii Stairs ascending/descending assisting apparatus
KR100564791B1 (en) 2005-12-27 2006-03-28 (주)태경감리공단건축사사무소 Safe stairs of houses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017065469A1 (en) * 2015-10-13 2017-04-20 김태중 Elastic foothold for stairs
US10174506B2 (en) 2015-10-13 2019-01-08 Tae Joong Kim Elastic foothold for stairs
CN111441546A (en) * 2020-04-10 2020-07-24 龚大娇 Indoor assembled stair of building
CN111441546B (en) * 2020-04-10 2021-08-06 临沂磊鑫节能环保科技有限公司 Indoor assembled stair of building

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