KR100996300B1 - Drilling of forcible-insertion type for casing or pile pouring - Google Patents

Drilling of forcible-insertion type for casing or pile pouring Download PDF

Info

Publication number
KR100996300B1
KR100996300B1 KR1020100016229A KR20100016229A KR100996300B1 KR 100996300 B1 KR100996300 B1 KR 100996300B1 KR 1020100016229 A KR1020100016229 A KR 1020100016229A KR 20100016229 A KR20100016229 A KR 20100016229A KR 100996300 B1 KR100996300 B1 KR 100996300B1
Authority
KR
South Korea
Prior art keywords
wedge
casing
pile
supporter
lifting plate
Prior art date
Application number
KR1020100016229A
Other languages
Korean (ko)
Inventor
신대수
Original Assignee
지이산업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 지이산업 주식회사 filed Critical 지이산업 주식회사
Priority to KR1020100016229A priority Critical patent/KR100996300B1/en
Application granted granted Critical
Publication of KR100996300B1 publication Critical patent/KR100996300B1/en

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/20Placing by pressure or pulling power
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D13/00Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
    • E02D13/04Guide devices; Guide frames
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/02Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting

Abstract

PURPOSE: A self-drilling machine for installation of a casing or pile is provided to implement the installation of a casing or a pile under a bridge or building. CONSTITUTION: A self-drilling machine for installation of a casing or pile comprises a drilling machine body, a supporter(3), a platform board(5), a main cylinder(7), a motor(8), a driving gear, a driven ring gear, a wedge, a ring wedge, a wedge lifting plate, and a cylinder for a wedge. The supporter is pivotally installed in the drilling machine body and attached with guides(4) on the front side. The platform board is coupled with a guide block(6) which ascends and descends along the guides. The main cylinder is installed between the upper end of the supporter and the platform board. The motor is installed on the top of the platform board. The driving gear is installed on the bottom of the platform board and driven with the motor. The driven ring gear is engaged with the driving gear. The wedge is connected via a connection link to the bottom of a wedge fixing element. The ring wedge compresses the wedge towards a casing or a pile. The wedge lifting plate is installed via a bearing in the circumference of the ring wedge. The cylinder for a wedge is installed between the platform board and the wedge lifting plate to move up and down the wedge lifting plate.

Description

케이싱 또는 파일 타설용 자주압입식 천공기{Drilling of forcible-insertion type for casing or pile pouring}Drilling of forcible-insertion type for casing or pile pouring}

본 발명은 교각 밑이나 건물 내에서 케이싱 또는 파일작업이 가능하게 한 케이싱 또는 파일 타설용 자주 압입식 천공기를 제공코자 하는 것이다.It is an object of the present invention to provide a self-pressing perforator for casing or pile placing that enables casing or pile work under a pier or in a building.

일반적으로 건축 및 교량기초공사를 위해서 연약지반이나, 암반층 등에 강관 등으로 제작되는 파일을 설치하여 보강작업을 천공기를 이용하여 행하게 된다.Generally, for construction and bridge foundation work, a file made of steel pipe or the like is installed on a soft ground or an underground layer, and reinforcement work is performed using a perforator.

일반적인 천공기는 이동 가능한 천공기본체에 지지대에 의해 지지되도록 가이드를 세우고, 이 가이드를 따라서 승강되는 회전장치를 설치하고, 회전장치에는 드릴 또는 케이싱을 설치하여 굴착작업을 행하게 된다.In general, a perforator sets a guide to be supported by a support on a movable perforating base body, installs a rotary device which is elevated along this guide, and installs a drill or a casing on the rotary device to perform excavation work.

또한 가이드를 따라서 승강되는 해머를 설치하고 해머로 파일을 타압하는 작업을 행하기도 한다.In addition, a hammer is installed along the guide to lift and pile down the pile with the hammer.

그러나 상기한 종래 천공기는 회전장치 및 해머 설치가 필수적이어서 천고가 높아지게 되는 바, 교각 밑이나 건물 내에서 작업을 행할 수 없는 단점이 있으므로, 교량의 확장이나 보강공사 등을 할 시에 많은 어려움이 있었고, 경우에 따라서는 시설되어 있는 교량의 일부를 철거 후 작업을 행하는 등 공사비용 증가 및 공사기간 연장 등 천공작업에 불합리한 점들이 있었던 바, 업계에서는 상기한 제반 문제점을 일소할 수 있는 천공기가 요구되고 있었다.
However, the above-described conventional perforator has a disadvantage in that it is necessary to install a rotating device and a hammer, so that the height of the ceiling is high, and there is a disadvantage in that work cannot be performed under a bridge or in a building. In some cases, there have been unreasonable points in the drilling work such as the increase of construction cost and extension of construction period, such as the removal of some of the installed bridges. there was.

이에 본 발명자는 상기한 종래 천공기가 갖는 제반 문제점을 일소코자 본 발명을 연구 개발한 것으로서, 본 발명에서는 교각 밑이나 건물 내에서 케이싱 또는 파일작업이 가능하게 한 케이싱 또는 파일 타설용 자주 압입식 천공기를 제공함에 기술적 과제를 두고 본 발명을 완성한 것이다.
Therefore, the present inventors have studied and developed the present invention to solve all the problems of the conventional perforator, and in the present invention, the casing or pile placing self-pressing perforator which enables casing or pile work under a pier or building. The present invention has been completed in view of the technical problem.

과제 해결수단으로 본 발명에서는 케이싱 또는 파일을 쐐기를 이용하여 고정한 상태에서 설치대판상에서 자유회전되도록 한 상태에서 메인실린더의 가압력으로 설치대판을 가압하여 회전하는 케이싱 또는 파일을 지면에 압입할 수 있게 하였다.
In order to solve the problem, in the present invention, the casing or pile can be press-fitted to the ground by pressing the mounting plate with the pressing force of the main cylinder in a state in which the casing or the pile is freely rotated on the mounting plate in the state of being fixed by the wedge. .

본 발명에서 제공하는 케이싱 또는 파일 타설용 자주 압입식 천공기를 사용할 경우 종래에는 천공이 불가능한 천고가 낮은 교각 밑이나 건물 내에서의 작업이 가능하게 되는 것으로, 종래 공사가 불가능한 곳에서의 작업이 가공하며, 그로인한 공사비용 절감과, 공사기간 단축 등 기대 이상의 효과를 득할 수 있다.
In the case of using the casing or pile-injected self-injection type perforator provided in the present invention, it is possible to work in a pier or in a building where a high-altitude drilling is impossible in the past, and work in a place where conventional construction is impossible. Therefore, it can achieve more than expected effect such as reducing construction cost and shortening construction period.

도 1은 본 발명에서 제공하는 자주 압입식 천공기의 일 실시예를 보인 정면도
도 2는 본 발명에서 제공하는 자주 압입식 천공기의 일 실시예를 보인 평면도
도 3은 본 발명에서 제공하는 자주 압입식 천공기의 구성을 보이기 위한 단면도
도 4는 본 발명에서 제공하는 자주 압입식 천공기의 쐐기 및 링 쐐기의 작동상태를 보인 확대 단면도
도 5는 본 발명에서 제공하는 자주 압입식 천공기의 쐐기 및 링 쐐기의 배치를 보인 평면도
1 is a front view showing an embodiment of the self-protruding punching machine provided in the present invention
Figure 2 is a plan view showing one embodiment of the self-protruding punching machine provided in the present invention
Figure 3 is a cross-sectional view for showing the configuration of the self-pressing punching machine provided in the present invention
Figure 4 is an enlarged cross-sectional view showing the operating state of the wedge and ring wedge of the self-protruding punching machine provided in the present invention
5 is a plan view showing the arrangement of the wedge and the ring wedge of the self-protruding punching machine provided in the present invention;

이하에서 본 발명의 구성을 첨부도면에 의거하여 설명한다.Hereinafter, the configuration of the present invention will be described based on the accompanying drawings.

본 발명에서 제공하는 케이싱 또는 파일 타설용 자주압입식 천공기(1)는 도시된 바와 같이 이동 가능한 천공기본체(2)에 서포터(3)를 회동 가능한 구조로 세우고 이 서포터(3)의 전방 양측으로 가이드(4)를 결합한다. 상기 서포터(3)는 5~7m 길이가 적당하다.Casing or pile self-protruding punching machine (1) provided by the present invention, as shown, the supporter (3) in a rotatable structure to the movable perforated body (2) and guides to both sides of the front of the supporter (3) Combine (4). The supporter 3 is appropriately 5 ~ 7m long.

상기 가이드(4)에는 중앙에 관통공(5a)이 형성된 설치대판(5)의 후방에 마련된 안내블록(6)을 결합하고, 서포터(3)의 상단과 설치대판(5) 사이에는 메인실린더(7)를 설치하여 설치대판(5)을 승강 가능하게 구성한다.A guide block 6 provided at the rear of a mounting base plate 5 having a through hole 5a formed at the center thereof is coupled to the guide 4 and a main cylinder 5a is provided between the upper end of the supporter 3 and the mounting base plate 5. [ 7) is installed to configure the mounting base (5) to be elevated.

이때 메인실린더(7)는 후술한 것과 같이 케이싱 또는 파일(A)을 압입시키는 압입력이 제공되어야 하는 바, 이에 부합하는 압입력을 제공할 수 있는 것을 선택하여 설치한다. At this time, the main cylinder 7 is to be provided with a pressing input for press-fitting the casing or the pile (A) as described below, it is selected and installed that can provide a pressing input corresponding thereto.

상기 설치대판(5) 상측으로는 모터(8)가 설치되어 있으며, 설치대판(5) 하측으로는 모터(8)에 의해 구동되는 구동기어(9)와 치차(齒車) 결합되는 피동 링기어(10)가 설치대판(5)에 고정되는 가이드관(11)에 베어링(12)으로 결합되어 회전되게 설치된다.A motor 8 is installed above the mounting base plate 5 and a driven ring gear 15 meshed with a driving gear 9 driven by a motor 8 is provided below the mounting base plate 5, 10 is coupled to the guide tube 11 is fixed to the mounting base (5) by the bearing 12 is installed to rotate.

상기 피동 링기어(10) 하측으로는 케이싱 또는 파일(A)과 이격되게 쐐기고정구(13)가 설치되며, 쐐기고정구(13) 하측으로는 수개의 쐐기(14)를 연결링크(15)로 회동 가능하게 연결한다.The wedge fixture 13 is installed below the driven ring gear 10 so as to be spaced apart from the casing or the pile A, and the several wedges 14 are rotated to the connecting link 15 under the wedge fixture 13. Connect as much as possible.

그리고 상기 쐐기(14)의 외측으로는 쐐기(14)의 외측 경사면(14a)과 접하는 경사면(16a)이 형성된 링 쐐기(16)를 배치하며, 링 쐐기(16)는 외주에 설치된 베어링(17)에 의해 쐐기승강판(18)과 회전자재되게 설치되며, 상기 설치대판(5)과 쐐기승강판(18) 사이에는 쐐기용 실린더(19)를 설치하여 쐐기승강판(18)을 승하강 시킬 수 있게 한다.And the outer side of the wedge 14 is arranged a ring wedge 16 formed with an inclined surface 16a in contact with the outer inclined surface 14a of the wedge 14, the ring wedge 16 is a bearing 17 installed on the outer periphery By the wedge lifting plate 18 and rotatably installed, the wedge lifting plate 18 can be raised and lowered by installing a wedge cylinder 19 between the mounting base 5 and the wedge lifting plate 18. To be.

이상과 같이 구성되는 본 발명의 케이싱 또는 파일 타설용 자주 압입식 천공기(1)를 이용하여 교각 밑이나 건물 내에서 케이싱 또는 파일(A)의 압입 작업이 가능한 것으로서, 본 발명을 사용코자 할 시에는 먼저 천공기본체(2)를 천공 위치로 이동시킨 상태에서 서포터(3)를 지면과 수직방향으로 세운다.The casing or pile (A) can be press-fitted under the pier or in the building by using the casings or pile-setting self-piercing perforator (1) according to the present invention. First, the supporter 3 is erected in the vertical direction with the ground in the state where the drilling base 2 is moved to the drilling position.

상기와 같이 서포터(3)를 세운 상태에서 메인실린더(7)로 설치대판(5)을 하강시킨 후 설치대판(5)의 중앙에 설치된 가이드관(11)을 통해서 압입코자 하는 케이싱 또는 파일(A)을 삽입한 상태에서 메인실린더(7)로 설치대판(5)을 다시 상승시키고 쐐기용 실린더(19)를 작동시켜 링 쐐기(16)를 쐐기(14)의 외측으로 이동시킨다. 이때 쐐기(14)는 쐐기고정구(13)와 연결링크(15)에 의해 회동되도록 연결되어 있는 바, 케이싱 또는 파일(A) 쪽으로 이동되면서 쐐기(14)의 내면이 케이싱 또는 파일(A)과 밀착된다.After the installation base plate 5 is lowered to the main cylinder 7 in the state where the supporter 3 is standing up as described above, the casing or the file A The mounting base plate 5 is raised again with the main cylinder 7 and the wedge cylinder 19 is operated to move the ring wedge 16 to the outside of the wedge 14. [ At this time, the wedge 14 is connected to be rotated by the wedge fixture 13 and the connecting link 15, the inner surface of the wedge 14 is in close contact with the casing or pile (A) while moving toward the casing or pile (A). do.

상기와 같이 쐐기(14)에 의해 케이싱 또는 파일(A)이 고정되면 설치대판(5)상에 설치되어 있는 모터(8)를 구동한다. 상기와 같이 모터(8)가 구동되면 쐐기(14) 및 쐐기(14)가 고정되는 쐐기고정구(13)와, 상기 쐐기(14)를 가압하고 있는 링 쐐기(16)가 케이싱 또는 파일(A)과 함께 회동하게 되는데, 이런 상태에서 메인실린더(7)를 하강시키면 회전하는 케이싱 또는 파일(A)이 연약지반에 압입 시공되는 것이다.
When the casing or the pile A is fixed by the wedge 14 as described above, the motor 8 installed on the mounting base 5 is driven. As described above, when the motor 8 is driven, the wedge fixture 13 to which the wedge 14 and the wedge 14 are fixed, and the ring wedge 16 pressing the wedge 14 are casing or pile A. When the main cylinder 7 is lowered in this state, the rotating casing or pile A is press-fitted to the soft ground.

1:(케이싱 또는 파일 타설용 자주압입식) 천공기
2:천공기본체 3:서포터
4:가이드 5:설치대판
5a:관통공 6:안내블록
7:메인실린더 8:모터
9:구동기어 10:피동 링기어
11:가이드관 12,17:베어링
13:쐐기고정구 14:쐐기
14a,16a:경사면 15:연결링크
16:링 쐐기 18:쐐기승강판
19:쐐기용 실린더
1: (self-pressing type for drilling casing or pile)
2: boring body 3: supporter
4: guide 5: mounting base
5a: Through hole 6: Information block
7: Main cylinder 8: motor
9: Drive gear 10: Driven ring gear
11: Guide Hall 12, 17: Bearing
13: Wedge Fixture 14: Wedge
14a, 16a: sloped surface 15: connecting link
16: Ring wedge 18: Wedge lifting plate
19: cylinder for wedge

Claims (1)

케이싱 또는 파일을 타설 천공기(1)에 이동 가능한 천공기본체(2)와;
상기 천공기본체(2)에 회동가능하게 세워진 서포터(3)와,
상기 서포터(3)의 상단과 설치대판(5) 사이에 설치한 메인실린더(7)와;
상기 설치대판(5) 상측에 설치되는 모터(8)와;
상기 설치대판(5) 하측에 설치되고 설치대판(5)의 중앙에 설치한 가이드관(11)과 베어링(12) 결합되며, 상기 모터(8)에 의해 구동되는 구동기어(9)와 치차(齒車) 결합되는 피동 링기어(10)와;
케이싱 또는 파일(A)과 이격되게 피동 링기어(10) 하측에 설치되는 쐐기고정구(13) 및 쐐기고정구(13)와 연결링크(15)들로 연결되는 수개의 쐐기(14)와;
상기 쐐기(14)의 외측 경사면(14a)과 접하는 경사면(16a)이 형성되어 상승시 쐐기(14)를 케이싱 또는 파일(A) 쪽으로 가압하는 링 쐐기(16)와;
상기 링 쐐기(16)의 외주에 베어링(17)을 매개로 설치되는 쐐기승강판(18)과;
상기 설치대판(5)과 쐐기승강판(18) 사이에 설치되어 쐐기승강판(18)을 승하강 시키는 쐐기용 실린더(19)로 구성된 타설용 자주압입식 천공기에 있어서,
상기 서포터(3)의 전방 양측으로 가이드(4)가 결합되고,
상기 설치대판에 가이드(4)를 따라서 승강하는 안내블록이 결합된 것을 특징으로 하는 케이싱 또는 파일 타설용 자주압입식 천공기.
A perforation body (2) capable of moving the casing or pile to the perforation machine (1);
A supporter 3 rotatably erected on the perforated body 2,
A main cylinder 7 installed between an upper end of the supporter 3 and an installation base 5;
A motor 8 installed above the mounting base 5;
The drive pipe 9 and the gear that are coupled to the guide tube 11 and the bearing 12 which are installed below the mounting plate 5 and installed in the center of the mounting plate 5, and are driven by the motor 8. Iii) a driven ring gear 10 to be coupled;
Several wedges 14 connected to the wedge fixture 13 and the wedge fixture 13 and the connecting links 15 installed below the driven ring gear 10 to be spaced apart from the casing or the pile A;
A ring wedge (16) formed with an inclined surface (16a) contacting the outer inclined surface (14a) of the wedge (14) to press the wedge (14) toward the casing or pile (A) when raised;
A wedge lifting plate 18 installed on the outer circumference of the ring wedge 16 via a bearing 17;
In the self-injection type perforation machine for pouring, which is formed between the mounting plate 5 and the wedge lifting plate 18, the wedge cylinder 19 for lifting up and down the wedge lifting plate 18,
Guides 4 are coupled to both front sides of the supporter 3,
Self-pressing perforator for casing or pile placing, characterized in that the guide block which is elevated along the guide (4) is coupled to the installation base.
KR1020100016229A 2010-02-23 2010-02-23 Drilling of forcible-insertion type for casing or pile pouring KR100996300B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100016229A KR100996300B1 (en) 2010-02-23 2010-02-23 Drilling of forcible-insertion type for casing or pile pouring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100016229A KR100996300B1 (en) 2010-02-23 2010-02-23 Drilling of forcible-insertion type for casing or pile pouring

Publications (1)

Publication Number Publication Date
KR100996300B1 true KR100996300B1 (en) 2010-11-24

Family

ID=43410060

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100016229A KR100996300B1 (en) 2010-02-23 2010-02-23 Drilling of forcible-insertion type for casing or pile pouring

Country Status (1)

Country Link
KR (1) KR100996300B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105484263A (en) * 2015-11-29 2016-04-13 江山显进机电科技服务有限公司 Pile delivery mechanism of pile embedding machine
WO2018188093A1 (en) * 2017-04-14 2018-10-18 深圳市源畅通科技有限公司 Construction pile driver preventing pile driving deviation
WO2020201612A1 (en) * 2019-04-05 2020-10-08 Junttan Oy An apparatus and a method for noise attenuation in an impact pile driving device
CN117605023A (en) * 2024-01-23 2024-02-27 中铁建工集团有限公司 Bored pile construction device and construction method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001214442A (en) * 2000-02-02 2001-08-07 Nippon Sharyo Seizo Kaisha Ltd Driving device for casing revolution of pile driver
KR200345574Y1 (en) 2004-01-06 2004-03-25 서정구 Rotary device for casings of auger machine
KR100561221B1 (en) * 2003-10-13 2006-03-15 대한주택공사 A drill machine with a small sized excavator
KR100716132B1 (en) 2005-08-02 2007-05-10 다우씨엔디(주) Pile construction apparatus capable of drilling and piling at a time

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001214442A (en) * 2000-02-02 2001-08-07 Nippon Sharyo Seizo Kaisha Ltd Driving device for casing revolution of pile driver
KR100561221B1 (en) * 2003-10-13 2006-03-15 대한주택공사 A drill machine with a small sized excavator
KR200345574Y1 (en) 2004-01-06 2004-03-25 서정구 Rotary device for casings of auger machine
KR100716132B1 (en) 2005-08-02 2007-05-10 다우씨엔디(주) Pile construction apparatus capable of drilling and piling at a time

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105484263A (en) * 2015-11-29 2016-04-13 江山显进机电科技服务有限公司 Pile delivery mechanism of pile embedding machine
CN105484263B (en) * 2015-11-29 2017-04-19 江山显进机电科技服务有限公司 Pile delivery mechanism of pile embedding machine
WO2018188093A1 (en) * 2017-04-14 2018-10-18 深圳市源畅通科技有限公司 Construction pile driver preventing pile driving deviation
WO2020201612A1 (en) * 2019-04-05 2020-10-08 Junttan Oy An apparatus and a method for noise attenuation in an impact pile driving device
CN117605023A (en) * 2024-01-23 2024-02-27 中铁建工集团有限公司 Bored pile construction device and construction method thereof
CN117605023B (en) * 2024-01-23 2024-03-22 中铁建工集团有限公司 Bored pile construction device and construction method thereof

Similar Documents

Publication Publication Date Title
CN102304922B (en) Full-pile casing construction device
RU2589783C2 (en) System of drilling rig with self-lifting drill floor
JP6467693B2 (en) Core drill equipment for excavator installation
KR100996300B1 (en) Drilling of forcible-insertion type for casing or pile pouring
RU2014133732A (en) FOLDING SHOULDER BASE FOR MOBILE DRILLING RIG
CN103669351A (en) Full-stroke hole-leading hydraulic static pile driver
CN102425372A (en) Vibrato-drilling type punching drilling rig
CN203716150U (en) Drilling press pile combined type pile machine
KR100719446B1 (en) Loading device of steel rib for tunnel
KR20060000115U (en) Wire rope lift method of Drill aid apparatus for narrow portion
CN106149723B (en) Civil engineering piling machine
CN202227346U (en) Construction device for full casing construction method
CN103711125A (en) Hole drilling and pile pressing combined type piling machine
JP4624867B2 (en) Seismic isolation repair method for existing buildings
JP4693586B2 (en) Circular shaft excavation method
CN102913121B (en) Flexible swing pipe vibrator boring machine
CN107227966B (en) Temporary support device for tunnel excavation
CN108118728A (en) The efficient earth-moving equipment of special-shaped deep basal pit and shoveling method
CN210529685U (en) Hollow drill rod excavator
KR100553353B1 (en) Drill aid apparatus for narrow portion and reparing and reinforcing method of structure by using the drill aid apparatus
KR200338159Y1 (en) Vending pole structure of traffic-control sign board for road
KR102070992B1 (en) Connection and disassembly device of Support pile and Pile constructing methods using thereof
JP4588732B2 (en) Tubing device with reaction force weight
KR101295983B1 (en) Construction Method of Hoistway for Onward Elevator Running using Temporary Structure
CN201714388U (en) Rock drill bracket special for digging a tunnel

Legal Events

Date Code Title Description
A201 Request for examination
A302 Request for accelerated examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130823

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20140829

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20150827

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20160922

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20170913

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20180910

Year of fee payment: 9