WO2017073979A2 - Dispositif anti-renversement d'échelle - Google Patents

Dispositif anti-renversement d'échelle Download PDF

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Publication number
WO2017073979A2
WO2017073979A2 PCT/KR2016/012006 KR2016012006W WO2017073979A2 WO 2017073979 A2 WO2017073979 A2 WO 2017073979A2 KR 2016012006 W KR2016012006 W KR 2016012006W WO 2017073979 A2 WO2017073979 A2 WO 2017073979A2
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WO
WIPO (PCT)
Prior art keywords
pivot
lever
outrigger
outrigger leg
ladder
Prior art date
Application number
PCT/KR2016/012006
Other languages
English (en)
Korean (ko)
Other versions
WO2017073979A3 (fr
Inventor
전두성
Original Assignee
은진산업 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 은진산업 주식회사 filed Critical 은진산업 주식회사
Publication of WO2017073979A2 publication Critical patent/WO2017073979A2/fr
Publication of WO2017073979A3 publication Critical patent/WO2017073979A3/fr

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  • the present invention relates to a ladder, and more particularly, to a fall prevention device of the ladder that can prevent the fall by holding the ladder firmly and stably by the outrigger leg (Outrigger leg).
  • ladders are used to move up and down high places with a rung or stepped mechanism at regular intervals between two side rails.
  • Ladder used in building construction site is manufactured to be easy to install and dismantle for convenience.
  • the A-type ladder is a pair of ladders coupled by a hinge (Hinge)
  • safety accidents are frequently caused by falling and sliding. Therefore, a worker who holds the lower part of the ladder is required to prevent the ladder from falling when the aerial work using the A-type ladder, but the situation is that most of the one worker to sue work because of waste of manpower.
  • the fall prevention device for preventing the fall of the ladder can be easily found in many patent documents such as Korean Utility Model Registration No. 20-0457903, Utility Model Registration No. 20-0455632, Utility Model Registration No. 20-0438784.
  • the fall prevention device of these patent documents is provided so that an outrigger leg can be folded in the lower part of rails. Outrigger legs support the ladder on the floor to prevent it from tipping over.
  • An object of the present invention is to provide a new ladder fall prevention device that can meet the above demands.
  • a fall prevention device of a ladder which concerns on this invention is attached to the side rail of a ladder,
  • the upper pivot is coupled to the lower distal part arrange
  • a pivot bracket to which the second pivot is coupled It has a first end that is rotatably coupled to the first pivot, and a second end that can be supported on the bottom, the rail groove is formed along the longitudinal direction on the outer surface, the side rail around the first pivot
  • An outrigger leg that rotates between a folded position that is folded relative to and an extended position that extends from the side rail to support a second end to the floor;
  • a lever having a first end rotatably coupled to the second pivot and a second end to which the third pivot is coupled;
  • a locking link mounted to operatively connect the third pivot and the guide slot, the locking link constraining rotation of the outrigger leg at an extended position of the outrigger leg;
  • a spring element mounted to be able to elastically bias the slider toward the first end of the lever.
  • each of the outrigger legs and the lever is configured to be rotated upward of the ladder to be folded in parallel with the side rails.
  • the locking link includes: a stopper fitted to the rail groove so that the locking link can be locked by being locked to the inner surface of the rail groove at the extended position of the outrigger leg; A lug extends from one side of the stopper through the guide slot to protrude out of the rail groove and is engaged to rotate to the third pivot.
  • the fall prevention device of the ladder when the outrigger leg is unfolded and supported on the floor, the lever and the locking link interlock with the outrigger leg to constrain the rotation of the outrigger leg, thereby securing the ladder by the outrigger leg. And stable support can prevent the fall of ladder very effectively.
  • the outrigger legs and levers are erected so that they are generally parallel to the side rails in an upward direction upward of the side rails, thereby simplifying the transport and storage of the ladder.
  • there is a useful effect that can easily release the locking state of the locking link by the operation of the lever to improve the convenience.
  • FIG. 1 is a perspective view showing an example of a ladder in which a fall prevention apparatus according to the present invention is adopted.
  • Figure 2 is a perspective view for explaining the operation of the fall prevention apparatus according to the present invention.
  • FIG 3 is a perspective view showing a state in which the outrigger leg is unfolded in the fall prevention apparatus according to the present invention.
  • Figure 4 is a perspective view showing a state in which the outrigger leg is folded in the fall prevention device according to the present invention.
  • FIG. 5 is a perspective view separately showing the fall prevention apparatus according to the present invention.
  • FIG. 6 is a cross-sectional view partially showing an unlocking state of the locking link in the fall prevention apparatus according to the present invention.
  • FIG. 7 is a cross-sectional view partially showing a locking state of the locking link in the fall prevention apparatus according to the present invention.
  • the fall prevention device 10 includes a pair of pivot brackets 30 coupled to each of the side rails 21 of the ladder 20.
  • the pivot brackets 30 have a fastening plate portion 32 coupled to the side rails 21 by fastening the plurality of bolts 31, and an extension plate portion 33 extending vertically from the fastening plate portion 32. It is formed in the "L" shape.
  • the extension plate portion 33 of each of the pivot brackets 30 is disposed to face each other.
  • the pivot brackets 30 may be comprised of mounting brackets in which the pair of extension plates extend parallel to each other at fastening plate portions.
  • the pivot brackets 30 may be attached to the lower outer surface of the side rails 21 by welding.
  • the extension plate portion 33 of each of the pivot brackets 30 may have a lower distal portion 34 and a side rail (arranged at a distance from the side rails 21). And an upper proximal portion 35 arranged adjacent to 21.
  • a pair of first pivot holes 36 are formed in the lower proximal portion 34 to align with each other.
  • a pair of second pivot holes 37 are formed to align with each other in the upper proximal portion 35. That is, as shown in FIGS. 3 to 5, each of the first and second pivot holes 36 and 37 is the second of the extension plate part 33 divided into the orthogonal axes 38 of the X and Y axes. It is formed in the corner part of each quadrant and a 4th quadrant.
  • the first pivot 40 is coupled to the first pivot hole 36.
  • the second pivot 41 is coupled to the second pivot hole 37.
  • the fall prevention apparatus 10 includes an outrigger leg 50 mounted to rotate on the pivot bracket 30.
  • the outrigger leg 50 is configured in the form of a rod having a first end 51 and a second end 52 supported at the bottom for supporting the ladder 20.
  • the first end 51 is coupled to the first pivot 40 so as to rotate about the first pivot 40.
  • the outrigger leg 50 extends from the folded position (P 1 ) and the side rails 21 which are folded about the side rails 21 about the first pivot 40, and extends from the second end 52. Rotate between unfold positions (P 2 ) to support the floor.
  • Rail grooves 53 are formed on the outer surface of the outrigger leg 50 along the longitudinal direction.
  • Foot plate 54 is mounted on the second end 52 to prevent slippage.
  • the foot plate 54 is made of plastic.
  • the fall prevention device 10 includes a lever 60 mounted to rotate about the second pivot 41.
  • the lever 60 is configured in the form of a rod having a first end 61 and a second end 62.
  • the first end 61 is coupled to the second pivot 41 so as to be able to rotate about the second pivot 41.
  • a fork end 64 having a pivot hole 63 is formed at the second end 62.
  • the fall arrest apparatus 10 comprises a slider 70, a locking link 80 and a spring element 90.
  • the slider 70 is mounted to slide along the rail groove 53 in association with the lever 60 rotating about the second pivot 41.
  • the slider 70 is mounted to the rail groove 53 so as to slide along the rail groove 53.
  • a guide slot 71 is formed along the longitudinal direction of the slider 70.
  • the locking link 80 is mounted to operatively connect the third pivot 42 of the lever 60 and the guide slot 71 of the slider 70, and the extended position P of the outrigger leg 50. 2 ) to constrain the rotation of the outrigger leg 50.
  • the locking link 80 is fitted to the rail groove 53 so that it can be locked by locking the inner surface of the rail groove 53 at the extended position P 2 of the outrigger leg 50.
  • a lug 82 extending from the one side of the stopper 81 to protrude out of the rail groove 53 through the guide slot 71.
  • the lug 82 is fitted in the guide slot 71 so as to slide along the guide slot 71, and coupled to the fork end 64 of the lever 60 by the third pivot 42. have.
  • the handle 43 is mounted on one side of the third pivot 42 so as to operate the lever 60.
  • the spring element 90 is mounted to elastically bias the slider 70 toward the first end 61 of the lever 60.
  • the spring element 90 consists of a coil spring 91 which is connected between the first end 61 of the lever 60 and one neighboring side and one of the locking links 80.
  • One end of the coil spring 91 is fixed to the lever 60 by fastening the screw 92, and the other end is caught in a hole 83 formed in the lug 82.
  • the outrigger leg 50 and the lever 60 are folded and transported substantially parallel to the side rails 21 and carried and stored.
  • the foot plate 52 is placed upside down so that the length of the ladder 20 is not lengthened by the outrigger leg 50. do.
  • the outrigger leg 50 and the lever 60 are folded to be generally parallel to the side rails 21. In the state where the outrigger leg 50 and the lever 60 are folded in parallel with each other, the displacement of the coil spring 91 is minimized.
  • the operator pulls the outrigger leg 50 folded out while supporting the side rails 21 of the ladder 20 on the floor.
  • the outrigger leg 50 is unfolded while being rotated about the first pivot 40, as shown by arrow "A" in FIG.
  • the lever 60 is rotated about the second pivot 41. Rotation of the outrigger leg 50 and the lever 60 causes an angle between the outrigger leg 50 and the lever 60 with respect to the third pivot 43.
  • the stopper 81 of the locking link 80 is in an unlocked state away from the inner surface of the rail groove 53. Accordingly, when the outrigger leg 50 is rotated from the folded position P1 to the extended position P2 about the first pivot 40, the lever 60 that interlocks with the outrigger leg 50 also smoothly rotates. do.
  • the coil spring 91 is extended to move the locking link 80 by the elastic restoring force. It is pulled toward one end 51.
  • the locking link 80 which is pulled toward the first end 51 of the outrigger leg 50, is rotated about the third pivot 42.
  • the stopper 81 is locked to the inner surface of the rail groove 53 by the rotation of the locking link 80 to restrain the rotation of the outrigger leg 50 and the locking link 80.
  • the slider 70 prevents the stopper 81 from being excessively rotated toward the outside of the rail groove 53 so that the locking link 80 cannot be rotated by being caught in the rail groove 53.
  • the locking link 80 is formed on the inner surface of the rail groove 53 at the extended position P 2 of the outrigger leg 50 on which the foot plate 54 is supported on the floor by the rotation of the outrigger leg 50.
  • the locking state of the locking link 80 must be released in order to fold the outrigger leg 50 again.
  • the operator pulls or pushes the lever 60 using the handle 43 to release the locking state of the locking link 80.
  • the locking link 80 rotates about the third pivot 42 by the operation of the lever 60, the locking link 80 is pulled or pushed to unlock the stopper 81 hanging on the rail groove 53.
  • the stopper 81 is unlocked, the outrigger leg 50 can be easily flipped by rotating the outrigger leg 50 and the locking link 80 from the extended position P 2 to the folded position P 1 . .
  • stopper 82 lug

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  • Ladders (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Abstract

La présente invention concerne un dispositif anti-renversement d'échelle pouvant supporter une échelle d'une manière ferme et stable, ce qui l'empêche de se renverser. La présente invention comprend un support pivotant, un pied stabilisateur, un levier, un élément coulissant, une liaison de verrouillage et un élément formant ressort. Le support pivotant est monté sur un montant de l'échelle. Un premier pivot est couplé à une pièce distale de la partie inférieure du support pivotant, qui est agencée sur un côté à distance du montant. Un deuxième pivot est couplé à une pièce proximale de la partie supérieure du support pivotant, qui est agencée de manière à être adjacente au montant. Le pied stabilisateur comporte une première extrémité qui est couplée au premier pivot de manière à pouvoir tourner et une seconde extrémité qui peut être posée au sol. Une rainure de montant est formée sur la surface extérieure du pied stabilisateur dans la direction longitudinale. Le pied stabilisateur tourne autour du premier pivot entre une position pliée dans laquelle il est plié par rapport au montant et une position dépliée dans laquelle il est déplié à partir du montant et peut supporter la seconde extrémité au sol. Le levier comporte une première extrémité qui est couplée au deuxième pivot de manière à pouvoir tourner et une seconde extrémité à laquelle est couplé un troisième pivot. L'élément coulissant est monté sur la rainure de montant de manière à pouvoir coulisser le long de celle-ci. L'élément coulissant présente une fente de guidage formée dans la direction longitudinale. La liaison de verrouillage est montée de manière à relier fonctionnellement le troisième pivot à la fente de guidage. Ladite liaison limite la rotation du pied stabilisateur lorsqu'il est en position dépliée. L'élément formant ressort est monté de telle sorte que l'élément coulissant peut être dévié de façon élastique vers la première extrémité du levier. D'après la présente invention, lorsque le pied stabilisateur est déplié et supporté au sol, le levier et la liaison de verrouillage coopèrent avec lui et en limitent la rotation de telle sorte que l'échelle est supportée d'une manière ferme et stable par le pied stabilisateur, ce qui empêche très efficacement l'échelle de se renverser.
PCT/KR2016/012006 2015-10-29 2016-10-25 Dispositif anti-renversement d'échelle WO2017073979A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2020150007031U KR200479669Y1 (ko) 2015-10-29 2015-10-29 사다리의 전도 방지 장치
KR20-2015-0007031 2015-10-29

Publications (2)

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WO2017073979A2 true WO2017073979A2 (fr) 2017-05-04
WO2017073979A3 WO2017073979A3 (fr) 2017-06-22

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PCT/KR2016/012006 WO2017073979A2 (fr) 2015-10-29 2016-10-25 Dispositif anti-renversement d'échelle

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WO (1) WO2017073979A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101976688B1 (ko) 2018-03-07 2019-05-09 현대엔지니어링 주식회사 사다리 전도 및 추락방지용 안전 시설물
KR102582621B1 (ko) 2018-04-24 2023-09-25 한화오션 주식회사 사다리 전도방지장치
KR102131219B1 (ko) * 2018-07-10 2020-07-07 구경화 스토퍼 어셈블리
KR20200036123A (ko) 2018-09-27 2020-04-07 임선우 안전 사다리
KR102042731B1 (ko) 2019-01-24 2019-11-08 이거송 사다리의 안전지지 구조
CN110630168B (zh) * 2019-09-06 2024-07-02 苏州飞华铝制工业有限公司 一种具备锁定功能的可折叠支柱结构
KR102186288B1 (ko) * 2020-03-09 2020-12-03 주식회사 유니테크 시스템 진동 저감 장치 및 이를 구비하는 다단 관람석
KR102555757B1 (ko) * 2021-04-12 2023-07-14 한국산업안전보건공단 플랫폼 사다리

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4577498B2 (ja) * 2005-01-26 2010-11-10 イーグルクランプ株式会社 梯子安定装置
KR200420842Y1 (ko) 2006-04-21 2006-07-06 이상구 전도방지장치를 갖는 사다리
KR100855365B1 (ko) * 2007-05-04 2008-09-04 이영학 작업대
KR200455632Y1 (ko) 2009-02-11 2011-09-16 김만섭 사다리용 전도방지장치
JP5916519B2 (ja) 2012-05-31 2016-05-11 アルインコ株式会社 高所作業装置におけるアウトリガー装置

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KR200479669Y1 (ko) 2016-02-23
WO2017073979A3 (fr) 2017-06-22

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