KR19990076279A - Mechanical joint method of concrete-reinforced rod - Google Patents
Mechanical joint method of concrete-reinforced rod Download PDFInfo
- Publication number
- KR19990076279A KR19990076279A KR1019980011097A KR19980011097A KR19990076279A KR 19990076279 A KR19990076279 A KR 19990076279A KR 1019980011097 A KR1019980011097 A KR 1019980011097A KR 19980011097 A KR19980011097 A KR 19980011097A KR 19990076279 A KR19990076279 A KR 19990076279A
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- KR
- South Korea
- Prior art keywords
- concrete
- reinforced
- diameter
- rod
- rolling
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 33
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 11
- 238000005098 hot rolling Methods 0.000 claims description 3
- 238000005097 cold rolling Methods 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
- F16B7/182—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements for coaxial connections of two rods or tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
- B21F15/02—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire
- B21F15/06—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire with additional connecting elements or material
Abstract
본 발명은 콘크리트-보강환봉의 기계적 이음방법에 관한 것으로서, 더욱 상세하게는 콘크리트-보강환봉의 단부를 압연가공한 다음, 이렇게 압연가공된 큰크리트-보강환봉의 단부를 나사전조가공하여 나사산을 형성하는 콘크리트-보강환봉의 기계적 이음방법에 관한 것이다.The present invention relates to a mechanical joint method of a concrete-reinforced rod, and more particularly, by rolling the end of the concrete-reinforced rod, and then screw-rolled the end of the rolled large-crete-reinforced rod to form a thread. It relates to a mechanical joint method of concrete-reinforced round bar.
부연하자면, 콘크리트-보강환봉의 단부를 압연가공하여 이에 형성된 리브 및 마디를 콘크리트-보강환봉내에 매몰시키고, 전조나사가공방법으로 콘크리트-보강환봉의 단부를 나사가공하는데, 이때 나사골의 지름은 콘크리트-보강환봉의 호칭지름보다 작게 형성하는 반면, 나사산의 지름은 콘크리트-보강환봉의 호칭지름보다 크게 형성함으로써 콘크리트-보강환봉의 단부와 중간부의 강도를 동일하게 유지시켜 주는 콘크리트-보강환봉의 기계적 이음방법를 제공하는데 그 목적이 있으며, 상기한 목적을 달성하기 위해 본 발명은 나사가공된 커플러로 호칭지름 ø를 가지며 그 단부가 나사가공된 콘크리트-보강환봉을 이을 수 있는 콘크리트-보강환봉의 기계적이음방법에 있어서, 나사가공전에 상기 호칭지름 ø와 동일하거나 큰 지름을 갖도록콘크리트-보강환봉의 단부를 압연하고, 나사골의 지름 d2는 호칭지름 ø보다 작게 형성하는 반면, 나사산의 지름 d3는 콘크리트-보강환봉의 호칭지름 ø보다 크게 형성되도록 나사전조가공을 수행하는 것을 특징으로 한다.In other words, the ends of the concrete-reinforced rods are rolled to bury ribs and nodes formed in the concrete-reinforced rods, and the ends of the concrete-reinforced rods are threaded by a rolling screw method, wherein the diameter of the screw bone is concrete- While the diameter of the thread is made smaller than the nominal diameter of the concrete-reinforced rod, the mechanical jointing method of the concrete-reinforced rod which maintains the strength of the end and the middle part of the concrete-reinforced rod is the same. In order to achieve the above object, the present invention provides a mechanically coupled method of a concrete-reinforced rod having a nominal diameter ø as a threaded coupler and an end thereof connected to a concrete-reinforced rod. The concrete is to have a diameter equal to or greater than the nominal diameter ø before threading. The end of the reinforcing rod is rolled, and the diameter d2 of the threaded bone is formed smaller than the nominal diameter ø, while the diameter d3 of the thread is carried out so that the thread rolling process is made larger than the nominal diameter ø of the concrete-reinforced rod. .
Description
본 발명은 철근콘크리트용 봉강(이하 콘크리트-보강환봉이라 칭함)의 기계적 이음방법에 관한 것으로서, 더욱 상세하게는 콘크리트-보강환봉의 단부를 압연가공한 다음, 이렇게 압연가공된 콘크리트-보강환봉의 단부를 나사전조가공하여 나사산을 형성하는 콘크리트-보강환봉의 기계적 이음방법에 관한 것이다.The present invention relates to a mechanical joint method of the bar for reinforced concrete (hereinafter referred to as concrete-reinforced round bar), and more particularly, after rolling the end of the concrete-reinforced round bar, and thus the end of the rolled concrete-reinforced round bar The present invention relates to a mechanical joint method of concrete-reinforced rods that are formed by thread rolling.
종래의 콘크리트-보강환봉의 기계적 이음방법은 공고번호 94-8311에 이미 공지된 것으로 도 1에서와 같이 두 콘크리트-보강환봉(1)(2)의 단부(4)(5)를 업셋팅(upsetting)하여 그 단부(4)(5)의 지름을 콘크리트보강환봉(1)(2)의 호칭지름보다 10%에서 30% 정도 크게 형성하여 단부(4)(5)의 강도를 높인 다음, 상기 콘크리트-보강환봉(1)(2)의 단부(4)(5)를 절삭나사가공을 하고, 각각의 나사가공된 단부(4)(5)들을 나사가공된 커플러(3)를 이용하여 상호 이음하는 기계적 구조의 이음방법으로서 이때 업셋트된 단부(4)(5)의 지름 d1은 콘크리트-보강환봉(1)(2)의 호칭지름 ø보다 크고, 나사골지름 d2는 콘크리트-보강환봉(1)(2)의 호칭지름 ø보다 크거나 동일하게 형성하는 것을 특징으로 하는 방법이 공지되어 있다.Conventional mechanical jointing method of concrete-reinforced rods is already known in the publication number 94-8311 as shown in Figure 1 upsetting the end (4) (5) of the two concrete-reinforced rods (1) (2) To increase the strength of the end portions 4, 5 by increasing the strength of the end portions 4, 5 by 10% to 30% larger than the nominal diameter of the concrete reinforcing rods 1, 2, -Cutting the end portions 4, 5 of the reinforcing rods 1, 2, and jointing each of the threaded ends 4, 5 with a threaded coupler 3 In this case, the diameter d1 of the upset end portion 4, 5 is larger than the nominal diameter ø of the concrete-reinforced round bar 1, 2, and the screw bone diameter d2 is the concrete-reinforced round bar 1). It is known to form the same or larger than the nominal diameter? Of 2).
그러나, 이와 같은 종래의 콘크리트-보강환봉의 기계적 이음방법은 그 단부(4)(5)의 강도를 유지시키기 위하여 단부(4)(5)를 나사가공하기 이전에 냉간(온간공정포함)이나 열간 업셋팅작업을 별도로 실시하므로서 이에 따른 작업지연이나 시공상의 원가상승의 요인이 발생되는 문제점이 있었다.However, such a conventional method of mechanical jointing of concrete-reinforced rods can be cold (including hot) or hot before threading the ends (4) (5) to maintain the strength of the ends (4) (5). As a separate upsetting operation, there was a problem in that a delay of work or a cost increase in construction occurred.
또한, 종래에는 단부(4)(5)의 나사가공이 일반적인 절삭나사가공이므로 나사산의 형상이 균일하지 못하고 거칠어 커플러(3)에 의한 콘크리트-보강환봉(1)(2)의 이음작업시 이음작업이 원활하지 못하다는 문제점이 있었다.In addition, conventionally, since the threading of the ends 4 and 5 is a general cutting thread, the shape of the thread is not uniform and rough, so that the jointing of the concrete-reinforced round bar 1 and 2 by the coupler 3 is performed. There was a problem that this was not smooth.
본 발명은 상기한 제반 문제점을 해결하기 위한 것으로서, 콘크리트-보강환봉의 단부를 압연가공하여 이에 형성된 리브 및 마디를 콘크리트-보강환봉내에 매몰시키고, 전조나사가공방법으로 콘크리트-보강환봉의 단부를 나사가공하는데,이때 나사골의 지름은 콘크리트-보강환봉의 호칭지름보다 작게 형성하는 반면, 나사산의 지름은 콘크리트-보강환봉의 호칭지름보다 크게 형성함으로써 콘크리트-보강환봉의 단부와 중간부의 강도를 동일하게 유지시켜 주는 콘크리트-보강환봉의 기계적 이음방법를 제공하는데 그 목적이 있다.The present invention is to solve the above-mentioned problems, by rolling the end of the concrete-reinforced rod bar and buried ribs and nodes formed therein into the concrete-reinforced rod, screwed the end of the concrete-reinforced rod by the rolling screw method In this case, the diameter of the threaded bone is smaller than the nominal diameter of the concrete-reinforced rod, while the diameter of the thread is formed larger than the nominal diameter of the concrete-reinforced rod to maintain the same strength of the end and the middle of the concrete-reinforced rod. The purpose is to provide a mechanical joint method of concrete-reinforced rods.
본 발명은 또, 상기 콘크리트-보강환봉의 단부에 대해 업셋팅공정을 생략하고 압연가공후 나사전조가공방법을 수행함으로써 단부의 나사산의 형상이 균일하고 매끄럽게 형성되어 커플러에 의한 이음작업이 원활하게 진행됨은 물론 이음작업시간도 단축되는 콘크리트-보강환봉의 기계적 이음방법를 제공하는데 그 목적이 있다.The present invention also skips the upsetting process for the end of the concrete-reinforced rod and performs the thread rolling process after rolling, thereby making the shape of the thread of the end uniform and smooth, so that the joint work by the coupler proceeds smoothly. In addition, the purpose of the present invention is to provide a mechanical joint method of concrete-reinforced rods, which shortens the joint work time.
도 1은 종래 업셋팅공정을 거쳐 형성된 콘크리트-보강환봉의 기계적 이음구조의 개략도,1 is a schematic diagram of a mechanical joint structure of a concrete-reinforced rod formed through a conventional upsetting process,
도 2의 (a)와 (b)는 본 발명에 따른 콘크리트-보강환봉의 단부를 제작하는 공정을 도시한 개략도,Figure 2 (a) and (b) is a schematic diagram showing a process for manufacturing the end of the concrete-reinforced round bar according to the present invention,
도 3은 본 발명에 따른 콘크리트-보강환봉의 기계적 이음구조의 개략도.Figure 3 is a schematic diagram of the mechanical joint structure of the concrete-reinforced round bar according to the present invention.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
11,12:콘크리트-보강환봉 13:커플러11, 12: concrete reinforcement round bar 13: coupler
14,15:단부 16:전조기14, 15: end 16: roll
17:나사전조가공롤17: Thread Rolling Roll
상기한 목적을 달성하기 위해 본 발명은 나사가공된 커플러로 호칭지름 ø를가지며 그 단부가 나사가공된 콘크리트-보강환봉을 이을 수 있는 콘크리트-보강환봉의 기계적 이음방법에 있어서, 나사가공전에 상기 호칭지름 ø와 동일하거나 큰 지름을 갖도록 콘크리트-보강환봉의 단부를 압연하고, 나사골의 지름 d2는 호칭지름 ø보다 작게 형성하는 반면, 나사산의 지름 d3는 콘크리트-보강환봉의 호칭지름 ø보다 크게 형성되도록 나사전조가공을 수행하는 것을 특징으로 한다.In order to achieve the above object, the present invention has a nominal diameter ø as a threaded coupler, and in the mechanical jointing method of concrete-reinforced rods whose ends may be threaded concrete-reinforced rods, the above-mentioned name before screwing The ends of the concrete-reinforced rods are rolled to have a diameter equal to or greater than the diameter ø, and the diameter of the threaded bone d2 is smaller than the nominal diameter ø, while the diameter of the thread d3 is larger than the nominal diameter ø of the concrete-reinforced rod. It is characterized by performing screw rolling.
본 발명은 또, 상기 압연은 단부의 나사가공되는 부분의 전길이에 걸쳐 수행하는 것을 특징으로 한다.The present invention is also characterized in that the rolling is carried out over the entire length of the portion to be threaded at the end.
또한, 본 발명은 상기 압연은 열간 및 냉간압연, 그리고 온간압연 등을 모두 포함하는 것을 특징으로 한다.In addition, the present invention is characterized in that the rolling includes both hot and cold rolling, and warm rolling.
이하, 본 발명의 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 2의 (a)와 (b)는 본 발명에 따른 콘크리트-보강환봉의 제작공정을 도시한 개략도이고, 도 3은 본 발명에 따른 콘크리트-보강환봉의 기계적 이음구조의 개략도이다.Figure 2 (a) and (b) is a schematic diagram showing the manufacturing process of the concrete-reinforced round bar according to the present invention, Figure 3 is a schematic diagram of the mechanical joint structure of the concrete-reinforced round bar according to the present invention.
두 콘크리트-보강환봉(11)(12)의 각 단부(14)(15)에 형성된 나사산에 커플러(13)가 결합되어진다.Couplers 13 are coupled to threads formed at each end 14, 15 of the two concrete-reinforcing rods 11, 12.
상기 콘크리트-보강환봉(11)(12)의 단부(14)(15)에 형성되는 나사산의 가공공정을 보면, 먼저 도 2의 (a)와 같이 콘크리트-보강환봉(11)(12)의 단부(14)(15)에 있는 리브 및 마디를 압연하는 압연공정을 수행한다.Looking at the machining process of the thread formed on the end 14, 15 of the concrete-reinforced round bar (11) (12), first end of the concrete-reinforced round bar (11) (12) as shown in Figure 2 (a) (14) A rolling process for rolling the ribs and nodes in (15) is performed.
부연하자면, 단부(14)(15)에 있는 리브 및 마디를 압연하여 단부(14)(15)의 직경 d1을 콘크리트-보강환봉(11)(12)의 호칭지름 ø와 동일하거나 약간 크게 형성된다.In other words, the ribs and nodes at the ends 14 and 15 are rolled so that the diameter d 1 of the ends 14 and 15 is equal to or slightly larger than the nominal diameter ø of the concrete-reinforced round bars 11 and 12. .
그런 다음, 압연가공된 콘크리트-보강환봉(11)(12)의 단부(14)(15)에 나사산을 가공하는 나사전조가공을 수행하게 되고, 이때 나사전조가공은 도 2의 (b)와 같이 전조기(16)내에서 회전되는 다수의 나사전조가공롤(17)에 콘크리트-보강환봉(11)(12)의 단부(14)(15)를 전진시켜 나사형상을 전조하게 되는데, 이때 도 3과 같이 단부(14)(15)에 구비된 나사골의 직경 d2는 콘크리트-보강환봉(11)(12)의 호칭지름 ø보다 작게 형성되는 반면, 나사산의 직경 d3는 큰크리트-보강환봉(11)(12)의 호칭지름 ø보다 크게 형성된다.Then, screw rolling is performed on the ends 14 and 15 of the rolled concrete-reinforced rods 11 and 12, where the screw rolling is performed as shown in FIG. To advance the screw shape by advancing the ends 14 and 15 of the concrete-reinforced annular rods 11 and 12 to the plurality of screw rolling rolls 17 rotated in the rolling mill 16, where FIG. The diameter d2 of the threaded bone provided at the ends 14 and 15 is smaller than the nominal diameter ø of the concrete-reinforced rods 11 and 12, while the diameter d3 of the thread is larger than the large-reinforced rod 11 It is formed larger than the nominal diameter phi of (12).
즉, 상기 콘크리트-보강환봉(11)(12)의 단부(14)(15)를 복수의 나사전조가공롤(17)로서 전조하게 되면, 나사전조가공롤(17)에 의해 나사골이 형성됨과 동시에 나사산은 큰크리트-보강환봉(11)(12)의 호칭지름보다 크게 돌출되어 종전과 같이 나사산의 절삭에 따른 콘크리트-보강환봉(11)(12)의 강도가 약화되는 것을 방지할 수 있게된다.That is, when the ends 14, 15 of the concrete-reinforced rods 11 and 12 are rolled as a plurality of thread rolling rolls 17, screw bone is formed by the thread rolling rolls 17 and at the same time. The thread protrudes larger than the nominal diameter of the large concrete-reinforced rods 11 and 12 so that the strength of the concrete-reinforced rods 11 and 12 due to the cutting of the thread can be prevented from being weakened as before.
상기와 같이 구성된 본 발명의 작용을 상세히 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above in detail.
도 2의 (a)와 같이 콘크리트-보강환봉(11)(12)의 단부(14)(15)에 있는 리브 및 마디를 압연하는 압연공정을 수행하게 되며, 상기 압연공정에서 단부(14)(15)의 직경d1을 콘크리트-보강환봉(11)(12)의 호칭지름 ø보다 동일하거나 약간 크게 형성한다.As shown in Figure 2 (a) to perform a rolling process for rolling the ribs and nodes in the ends 14, 15 of the concrete-reinforced rods (11) (12), end 14 (in the rolling process) The diameter d1 of 15) is formed equal to or slightly larger than the nominal diameter ø of the concrete-reinforced round bars 11 and 12.
그런 다음, 도 2의 (b)와 같이 압연가공된 콘크리트-보강환봉(11)(12)의 단부(14)(15)에 나사산을 가공하는 나사전조가공을 수행하게 되는데, 나사전조가공은 전조기(16)내에서 회전되는 다수의 나사전조가공롤(die)(17)에 콘크리트-보강환봉(11)(12)의 단부(14)(15)를 전진시켜 나사형상을 전조하게 되며, 이때 도 3과 같이 단부(14)(15)에 구비된 나사골의 직경 d2는 콘크리트-보강환봉(11)(12)의 호칭지름 ø보다 작게 형성되는 반면, 나사산의 직경 d3는 콘크리트-보강환봉(11)(12)의 호칭지름ø보다 크게 형성된다.Then, as shown in (b) of FIG. 2, the thread rolling process is performed on the ends 14 and 15 of the rolled concrete-reinforced round rods 11 and 12, and the thread rolling process is performed. The ends 14 and 15 of the concrete-reinforced rods 11 and 12 are advanced to a plurality of thread rolling rolls 17 which are rotated in the early stage 16 to roll the screw shape. As shown in FIG. 3, the diameter d2 of the screw bone provided at the ends 14 and 15 is smaller than the nominal diameter ø of the concrete-reinforced rods 11 and 12, while the diameter d3 of the thread is the concrete-reinforced rod 11. (12) is larger than the nominal diameter ø.
즉, 상기 콘크리트-보강환봉(11)(12)의 단부(14)(15)를 복수의 나사전조가공롤 (17)로서 전조하게 되면, 나사전조가공롤(17)에 의해 나사골이 형성됨과 동시에 나사산이 콘크리트-보강환봉(11)(12)의 호칭지름보다 크게 돌출되어 종전과 같이 나사산의 절삭에 따른 콘크리트-보강환봉(11)(12)의 강도가 약화되는 것을 방지할 수 있게된다That is, when the ends 14, 15 of the concrete-reinforced round bar 11, 12 are rolled with a plurality of screw rolling rolls 17, screw bone is formed by the screw rolling rolls 17 and at the same time. The thread protrudes larger than the nominal diameter of the concrete-reinforced rods 11 and 12 so that the strength of the concrete-reinforced rods 11 and 12 due to the cutting of the thread can be prevented from being weakened as before.
이상에서와 같이, 본 발명은 콘크리트-보강환봉(11)(12)의 단부를 압연가공하여 이에 형성된 리브 및 마디를 압연한 다음, 이렇게 압연가공된 단부(14)(15)에 나사전조가공을 수행하여 나사골의 직경 d2를 콘크리트-보강환봉(11)(12)의 호칭지름ø보다 작게 형성하는 반면에 나사산의 직경 d3를 콘크리트-보강환봉(11)(12)의 호칭지름 ø보다 크게 형성함으로써 재료의 변형을 극소화시켜 콘크리트-보강환봉(11)(12)의 단부(14)(15) 강도를 크게 향상시킨 매우 유용한 발명이다.As described above, the present invention is to roll the ribs and nodes formed by rolling the ends of the concrete-reinforced rods (11) (12), and then screwed to the rolled ends (14) (15) The diameter d2 of the screw bone is formed to be smaller than the nominal diameter ø of the concrete-reinforced rods 11 and 12, while the diameter d3 of the thread is formed to be larger than the nominal diameter ø of the concrete-reinforced rods 11 and 12. It is a very useful invention in which the deformation of the material is minimized to greatly improve the strength of the ends 14 and 15 of the concrete-reinforced rods 11 and 12.
본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구 범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고, 그와 같은 변경은 청구 범위 기재의 범위내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980011097A KR100266766B1 (en) | 1998-03-31 | 1998-03-31 | Connecting method for machinery of concrete reinforcement bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980011097A KR100266766B1 (en) | 1998-03-31 | 1998-03-31 | Connecting method for machinery of concrete reinforcement bar |
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| KR19990076279A true KR19990076279A (en) | 1999-10-15 |
| KR100266766B1 KR100266766B1 (en) | 2000-09-15 |
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| KR1019980011097A KR100266766B1 (en) | 1998-03-31 | 1998-03-31 | Connecting method for machinery of concrete reinforcement bar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020065969A (en) * | 2001-02-08 | 2002-08-14 | 김순분 | Machining method of a screw for a reinforcement bar |
| KR100515204B1 (en) * | 1998-04-13 | 2005-11-21 | 신우산업 주식회사 | Connection structure of reinforcing bar for concrete reinforcement and processing method of the connection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950011789A (en) * | 1993-10-06 | 1995-05-16 | 김우중 | End swelling screw of internal rebar |
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1998
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100515204B1 (en) * | 1998-04-13 | 2005-11-21 | 신우산업 주식회사 | Connection structure of reinforcing bar for concrete reinforcement and processing method of the connection |
| KR20020065969A (en) * | 2001-02-08 | 2002-08-14 | 김순분 | Machining method of a screw for a reinforcement bar |
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| KR100266766B1 (en) | 2000-09-15 |
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