WO2010017684A1 - Échelle à coulisse - Google Patents

Échelle à coulisse Download PDF

Info

Publication number
WO2010017684A1
WO2010017684A1 PCT/CN2009/000792 CN2009000792W WO2010017684A1 WO 2010017684 A1 WO2010017684 A1 WO 2010017684A1 CN 2009000792 W CN2009000792 W CN 2009000792W WO 2010017684 A1 WO2010017684 A1 WO 2010017684A1
Authority
WO
WIPO (PCT)
Prior art keywords
crosspiece
latch
sleeve
pin
ladder
Prior art date
Application number
PCT/CN2009/000792
Other languages
English (en)
Chinese (zh)
Inventor
王万兴
Original Assignee
Wang Wanxing
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 Wang Wanxing filed Critical Wang Wanxing
Priority to EP09806287.0A priority Critical patent/EP2322752B1/fr
Priority to DK09806287.0T priority patent/DK2322752T3/da
Publication of WO2010017684A1 publication Critical patent/WO2010017684A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
    • E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/06—Securing devices or hooks for parts of extensible ladders

Definitions

  • This invention relates to a ladder, and more particularly to an extension ladder including a plurality of ladder bars that are relatively slidable and nested together. Background technique
  • Ladders are often used when repairs or maintenance tasks occur in homes, apartments, farms, factories, and other locations. Ladders must be collected in a certain place when not in use. Longer ladders allow people to reach higher heights, but they are not easy to carry and will take up more space when they are stored. Retractable ladder
  • Two ladder rods consisting of multi-section telescopically folded joint rods, the bottom end of each joint rod being assembled inside the lower section rod;
  • each crosspiece being mounted between the opposite side rails;
  • a locking mechanism installed in the crosspiece for automatically locking the levers of the ladder rod one by one when the joint lever is deployed;
  • the feature is that the locking mechanism in the cross rail releases the connection between the upper rail and the side rails when each rail is collapsed by the folding of the ladder and touches the lower rail.
  • This patent provides the function of folding the ladder from bottom to top. Once the bottom two crosspieces are first folded, the third crosspiece is automatically folded from bottom to top, and so on until the topmost crosspiece is automatically fold.
  • this also becomes a hidden danger of using unsafe and prone to accidents, especially the damage caused by squeezing, especially when the ladder is in use, if a third party accidentally touches the switch of the lowermost crosspiece, This will cause all the crosspieces to be automatically folded, which may cause the user standing on the crossbar to fall and be injured.
  • the existing extension ladders which are capable of folding the ladders by pressing the buttons on each of the rails one at a time are safer in use.
  • U.S. Patent No. 7,404,094 B2 also discloses a telescopic ladder which is convenient and safe to use.
  • the ladder comprises: a first ladder bar, a second ladder bar and a plurality of crosspieces extending between the first ladder bar and the second ladder bar;
  • the rod includes a first joint rod and a second joint rod, the first joint rod includes an inner surface, and the second joint rod is connected to the first joint rod by a nesting manner to form a telescopic structure that can move relative to each other in the longitudinal direction;
  • a locking mechanism for selectively locking the second link rod relative to the first joint rod
  • a button operatively coupled to the locking mechanism for manipulating the locking mechanism; the button being disposed adjacent to the first node bar and having a recess adapted to the size of the thumb tip, the thumb tip being placed In the recess, the button can be pushed in the direction from the first link to the second link to cancel the locking of the second link by the locking mechanism; a sleeve is sleeved on the outer surface of the second section rod; the sleeve has an outer guiding surface in contact with the inner surface of the first section rod.
  • buttons Compared with the existing safe extension ladders, the most prominent technical features of the claims are the “buttons” and “casings”, which mainly solve the problem of how to make the button manipulation more convenient and how to reduce the adjacent node rods. Friction and wear problems.
  • the technical problem to be solved by the present invention is to provide an extension ladder which is convenient for one-hand operation of the operation button to unlock the crosspiece and the corresponding joint lever, thereby making the folding operation of the ladder more convenient.
  • the second technical problem to be solved by the present invention is to provide an extension ladder that can prevent the upper section lever from being disengaged from the next section lever when the lever is quickly pulled, and can prompt the user to pull the lever in place.
  • an extension ladder comprising two oppositely disposed left and right ladder bars, and a plurality of crosspieces disposed between the left and right ladder bars
  • the left ladder rod is composed of a plurality of sections of the telescopically folded left section poles
  • the right ladder pole is composed of a plurality of sections of the retractable right section rods
  • the crosspieces are installed on the opposite two left and right sides.
  • the left and right locking mechanisms respectively have left and right manipulation buttons; wherein: the left and right manipulation buttons are located at the central portion of the crosspiece and are arranged adjacent to each other, so that one hand can operate simultaneously. Two control buttons unlock the crosspiece and the corresponding club.
  • the above left locking mechanism further includes:
  • a left connecting sleeve connected to the left end of the crosspiece, the left connecting sleeve interconnecting the crosspiece with the upper portion of the corresponding left strut; the left latch disposed in the crosspiece, the left latch is horizontally movable relative to the crosspiece and can extend horizontally Outside the left side of the file;
  • a first spring that is sleeved on the left pin and keeps the left pin always exposed to the left outer side of the crosspiece
  • the left control button is connected to the left pin.
  • the upper portion of the left node has a first locking hole for the left pin to pass through, and the middle portion of the left bar is also provided with a left pin for insertion. Second locking hole;
  • the right locking mechanism further includes: a right connecting sleeve connected to the right end of the crosspiece, the right connecting sleeve connecting the crosspiece and the phase The upper portions of the right section rods should be connected to each other;
  • the right latch disposed in the crosspiece, the right latch is horizontally movable relative to the horizontal axis and can extend outside the right side of the crosspiece;
  • the right control button is connected to the right pin.
  • the upper portion of the right node is provided with a third locking hole for the right pin to pass through, and the middle portion of the right node is also provided with a right pin for insertion.
  • the fourth locking hole is provided.
  • the aforementioned locking mechanism involves few components, so it is a relatively simple locking mechanism.
  • the locking mechanism can also adopt various locking modes in the existing extension ladder.
  • the left side of the crosspiece has a first spring seat, the left pin is movablely passed through the first spring seat, and the first spring is disposed in the first spring seat, and the first spring is abutted Relying on the right inner wall of the first spring seat, the other end abutting against the shoulder of the middle of the left pin;
  • the right side of the crosspiece has a second spring seat, and the right pin is movable through the first
  • the second spring is disposed in the second spring seat, the second spring abuts against the left inner wall of the second spring seat, and the other end abuts against the shoulder of the middle of the right pin.
  • the spring seat not only functions to accommodate the spring, but also has the function of supporting the bolt.
  • the left side of the above-mentioned crosspiece has a left limit block, the left pin is movablely passed through the left limit block, and the left pin is fixed with two retaining rings arranged on the end face of the left limit block.
  • the two retaining rings are located on two sides of the left limiting block;
  • the right side of the crossbar has a right limiting block, and the right latch is movable through the right limiting block, and the right locking pin
  • Two spacer rings are arranged at the interval, and the two retaining rings are located on both sides of the right limiting block.
  • the structure for limiting the movement of the pin is not limited to this one, and other prior art techniques may be employed.
  • the middle portion of the outer peripheral surface of the left joint rod is provided with a left limit ring, and the left limit ring is located between two adjacent left joint rods, correspondingly,
  • the left connecting sleeve has an annular surface, and the annular surface forms a socket.
  • the socket is tightly fitted with the outer circumference of the upper portion of the left joint.
  • the upper end of the inner wall of the sleeve forms an inner shoulder that can be blocked from the left limiting ring.
  • the utility model further has a through hole for the left pin to pass through and penetrates with the socket; the middle portion of the outer peripheral surface of the right bar is sleeved with a right limiting ring, and the right limiting ring is located at two adjacent right links
  • the right connecting sleeve has an annular surface, and the annular surface forms a socket.
  • the socket is tightly fitted with the outer periphery of the upper right rod.
  • the upper end of the inner wall of the sleeve is formed with a right limiting ring.
  • the inner shoulder sleeve is provided with a through hole for the right pin to pass through and penetrate the socket.
  • the limit ring When the strut is pulled up in position, the limit ring is matched with the gear of the inner shoulder of the connecting sleeve to prevent the strut from being further pulled out, and the limit ring is blocked when the inner shoulder is blocked, that is, the strut can no longer be easily pulled. , the user is prompted: At this time, the node bar is already in place, and the lever can be stopped.
  • the manner in which the limiting ring is limited to the node bar may be as follows: the left limiting ring has a first notch opposite to the first locking hole, and the inner wall of the left limiting ring Having a plurality of convex portions, correspondingly, the middle peripheral wall of the left joint rod has a plurality of holes for the convex portions to be engaged; the right limit ring has a third locking hole And a second notch, and the inner wall of the right limiting ring has a plurality of convex portions.
  • the middle peripheral wall of the right right bar has a plurality of holes for the convex portion to be engaged.
  • the joint rod can make the limit ring convenient and securely restrained in the middle of the joint rod, and the operation causes the limit ring to be opened in the direction of the notch, the limit ring is fastened to the outer peripheral surface of the joint rod, and the convex portion is inserted into the corresponding hole. , you can install the limit ring.
  • a left sleeve is sleeved at the lower end opening of the left joint rod, and an upper outer surface of the left sleeve is in contact with an inner end surface of the left section of the lower section, and a lower outer surface of the left sleeve is tapered;
  • a right sleeve is sleeved at the lower end opening of the right joint rod, and an upper outer surface of the right sleeve is in contact with an inner end surface of the right section of the lower section, and a lower outer surface of the right sleeve is tapered.
  • the upper outer surfaces of the left and right sleeves are respectively in contact with the inner end faces of the left and right joints of the next section, thereby playing a damping role when the relative movements between the adjacent joints are relatively prevented, thereby preventing the relative movement of the joints from being too fast. Avoiding the collision between adjacent crosspieces and damaging the crosspiece, and reducing the noise caused by the collision of the crosspieces; the lower outer surface of the left and right sleeves is tapered to facilitate the previous section.
  • the pole is inserted into the next section of the pole.
  • the upper inner surface of the left sleeve has a plurality of bumps.
  • the lower peripheral wall of the left joint has a plurality of positioning holes for the bumps to be engaged; the upper portion of the right sleeve The surface has a plurality of bumps.
  • the lower peripheral wall of the right mast has a plurality of positioning holes for the bumps to be engaged.
  • the left side of the left control button has a stopper for facilitating fingertip erection; the left side of the right manipulation button has a stopper for facilitating fingertip erection.
  • the stopper is arranged on the inner side of the control button, which can reduce the operation span between the fingers, and the finger can better control the button and make the operation easier.
  • the extension ladder sets the left and right control buttons in the central part of the crosspiece and is adjacent to each other, so that only the thumbs and forefingers of the same hand are opened during operation, and the thumb is In contact with the right control button, the index finger is in contact with the left control button, and then the left and right control buttons are driven inwardly to move toward each other to operate the left and right locking mechanisms to unlock the crosspiece and the corresponding left and right joint levers.
  • the other hand that can be vacated can hold the node bar, let the node slowly move down, avoid the impact between adjacent crosspieces, and make the operation smooth.
  • FIG. 1 is a schematic perspective view of an embodiment of the present invention
  • Figure 2 is a cross-sectional view showing an embodiment of the present invention
  • Figure 3 is an enlarged view of A of Figure 2;
  • Figure 4 is an enlarged view of B of Figure 2;
  • Figure 5 is an enlarged view of the portion C of Figure 2;
  • Figure 6 is an enlarged view of D of Figure 2;
  • Figure 7 is an enlarged view of E at Figure 2;
  • Figure 8 is an enlarged view of the F of Figure 2;
  • Figure 9 is an exploded perspective view of an embodiment of the present invention.
  • FIG. 10 is a schematic view showing the installation between the limiting ring and the sleeve and the joint rod in the embodiment of the present invention. detailed description
  • FIG. 1-10 A preferred embodiment of the present invention is shown in Figures 1-10.
  • An extension ladder comprising two oppositely disposed left ladder bars 1 and right ladder bars 2, and a plurality of crosspieces 3 disposed between the left and right ladder bars 1, 2, wherein the left ladder bars 1 are
  • the telescopically folded left section bar 1 1 is sleeved in sequence to form a telescopic structure
  • the right ladder bar 2 is sequentially assembled by a plurality of sections of the telescopically folded right section bar 21 to form a telescopic structure, the left side,
  • the right section bars 11, 21 are generally tubular.
  • the crosspiece 3 is installed between the two opposite left and right joint rods 11, 21, and the crosspiece 3 has a hollow rectangular parallelepiped shape, and the crosspiece 3 is provided with a crosspiece 3 when the ladder is deployed.
  • a left locking mechanism 4 locked with the left section lever 11 of the previous section, and a right locking mechanism 5 for locking the rail 3 to the right section lever 21 of the upper section to prevent the ladder from being retracted and folded, the left and right locking mechanisms 4 And 5 respectively have left and right manipulation buttons 6, 7 for operating the two locking structures.
  • the left locking mechanism 4 further includes:
  • a left connecting sleeve 41 connected to the left end of the crosspiece 3, the left connecting sleeve 41 interconnecting the crosspiece 3 with the upper portion of the corresponding left joint rod 11;
  • the left latch 42 is horizontally movable relative to the crosspiece 3 and can extend outside the left side of the crosspiece 3;
  • the first spring 43 is sleeved on the left latch 42 and the left latch 42 is always kept exposed to the left outer side of the crosspiece 3;
  • the left side of the crosspiece 3 has a first spring seat 44.
  • the left latch 42 is movably passed through the first spring seat 44.
  • the first spring 43 is disposed in the first spring seat 44.
  • a spring 43-end abuts against the right inner wall of the first spring seat 44, and the other end abuts against the shoulder 421 of the middle of the left pin 42;
  • left limit block 45 on the left side of the crosspiece 3, the left pin 42 is movable through the left limit block 45, and the left pin 42 is fixed with two left and left limit blocks.
  • the retaining ring 46 of the 45 end face is arranged, the two retaining rings 46 are located on both sides of the left limiting block 45; the left control button 6 is connected to the left latch 42, correspondingly, the left node 11
  • the upper portion has a first locking hole 111 through which the left pin 42 passes, and the middle portion of the left node 11 is also opened for the left pin 42 to be inserted.
  • the second locking hole 112 is inserted.
  • the right locking mechanism 5 further includes:
  • the second spring 53 is disposed on the right latch 52 and keeps the right latch 52 always exposed to the outer right side of the crosspiece 3;
  • a second spring seat 54 is disposed on the right side of the crosspiece 3, and the right latch 52 is movably passed through the second spring seat 54.
  • the second spring 53 is disposed in the second spring seat 54.
  • the two springs 53 are abutted against the left inner wall of the second spring seat 54 and the other end abuts against the shoulder 521 of the middle of the right pin 52;
  • the right latch 52 is movably passed through the right limiting block 55, and two right and right limiting blocks are fixed on the right latch 52.
  • the retaining ring 56 of the end face of the 55, the two retaining rings 56 are located on both sides of the right limiting block 55; the right operating button 7 is connected to the right latch 52, correspondingly, the right node 21
  • the upper portion is provided with a third locking hole 211 through which the right pin 52 passes, and the middle portion of the right lever 21 is also provided with a fourth locking hole 212 through which the right pin 52 is inserted.
  • the left and right control buttons 6, 7 are located at the central portion of the crosspiece 3 and are disposed adjacent to each other, that is, in the middle of the crosspiece 3, there are two left and right slots 31 for the left and right manipulation buttons 6, 7 to pass through, 32, the left and right control buttons 6, 7 are respectively limited in the left and right slots 31, 32, and can be laterally moved relative to the left and right slots 31, 32, respectively, so that one hand can simultaneously operate the two control buttons 6 7, and the crosspiece 3 is unlocked with the corresponding joint levers 11, 21.
  • the right side of the left manipulation button 6 has a stopper 61 for facilitating fingertip erection; the left side of the right manipulation button 7 has a stopper 71 for facilitating fingertip erection.
  • a left limiting ring 8 is disposed in a middle portion of the outer peripheral surface of the left knuckle 11 , and the left limiting ring 8 is located between the adjacent two left knuckles 11 .
  • the left connecting sleeve 41 has an annular surface.
  • the annular surface forms a socket 411.
  • the socket 411 is tightly coupled to the outer periphery of the upper portion of the left joint rod 11 and is connected by a connecting member.
  • the upper end of the inner wall of the sleeve 411 forms an inner shoulder 412 that can be blocked from the left limiting ring 8.
  • the left connecting sleeve 41 further has a through hole 413 through which the left latch 42 passes and penetrates the socket 411.
  • the left limiting ring 8 has a first locking hole 111 opposite thereto. a first notch 81, and the inner wall of the left limiting ring 8 has a plurality of convex portions 82.
  • the central peripheral wall of the left fixed bar 11 has a plurality of holes 113 for the convex portion 82 to be engaged. .
  • a right limiting ring 9 is disposed in a middle portion of the outer peripheral surface of the right knuckle 21, and the right limiting ring 9 is located between two adjacent right knuckles 21, and correspondingly, the right connecting sleeve 51 has an annular surface.
  • the annular surface forms a socket 511.
  • the socket 511 is tightly coupled with the outer periphery of the upper right rod 21, and is connected by a connecting member.
  • the upper end of the inner wall of the socket 511 forms an inner shoulder that can be blocked from the right limiting ring 9.
  • the right connecting sleeve 51 further has a right plug 52 for passing through and a through hole 513 through which the socket 511 passes;
  • the right limiting ring 9 has a second notch 91 opposite to the third locking hole 211, and the inner wall of the right limiting ring 9 has a plurality of The convex portion 92, correspondingly, the middle peripheral wall of the right throttle 21 has a plurality of holes 213 for the convex portion 92 to be engaged.
  • a left sleeve 10 is sleeved at the lower end opening of the left section rod 11, and the upper outer surface 101 of the left sleeve 10 is in contact with the inner end surface of the left section rod 11 of the next section.
  • the lower outer surface 102 of the left sleeve 10 is tapered; the upper inner surface of the left sleeve 10 has a plurality of bumps 103.
  • the lower peripheral wall of the left section 11 has a plurality of supply points. The positioning hole 114 into which the bump 103 is stuck is described.
  • a right sleeve 12 is sleeved at a lower end opening of the right joint rod 21, and an upper outer surface 121 of the right sleeve 12 is in contact with an inner end surface of the right joint rod 21 of the lower section, and a lower portion of the right sleeve 12 is
  • the outer surface 122 has a tapered shape.
  • the upper inner surface of the right sleeve 12 has a plurality of bumps 123.
  • the lower peripheral wall of the right joint 21 has a plurality of hooks 123 for the bumps 123.
  • Positioning hole 214 The working principle and process of the embodiment of the present invention are as follows:
  • only one working unit of the left strut 11, the right strut 21, the crosspiece 3 connected to the left and right strut 11, 21, and the upper left and right strut 11, 21 are formed.
  • the left strut 11, the right strut 21, the crosspiece 3 connected to the left and right strut 11, 21, and the upper left and right strut 11, 21 are formed.
  • the locking process of the right throttle lever 21 Pulling up the right throttle lever 21, when the right throttle lever 21 is pulled up into position, the right limit ring 9 is engaged with the gear of the inner shoulder 512 on the right connecting sleeve 51 to block the right throttle lever 21 Further pulled out, and the right limit ring 9 hits the inner shoulder 512 blocked, indicating the user, at this time the right stick 21 has been in place, and the right link 21 is stopped.
  • the fourth locking hole 212 in the middle of the pulled right link 21 is located on the same axis as the upper third locking hole 211 of the next right link 21, and therefore is located between the next section right bar 21
  • the right latch 52 in the gear 3 is ejected by the second spring 53 and sequentially passes through the through hole 513 and the third locking hole 211 of the right connecting sleeve 51, and then inserted into the fourth locking hole 212, and the crosspiece 3 and the upper
  • the right section lever 21 of one section is locked together, and the rail 3 is fixed to the other right section pole 21, so the rail 3, the right section bar 32 connected to the crosspiece 3, and the upper section right section bar 32 are mutually locking.
  • the locking process of the left section lever 11 is the same as that of the right section lever 21 and is performed simultaneously.
  • Unlocking process Open the thumb and forefinger on the same hand, the thumb is in contact with the right control button 7, the index finger is in contact with the left control button 6, and then the left and right control buttons 6 and 7 are moved inwardly at the same time, left and right.
  • the latches 42 and 52 are simultaneously moved toward each other, and the left and right latches 42 and 52 are simultaneously disengaged from the second and fourth locking holes 112 and 212 on the left and right section levers 11, 21 of the previous section, and the crosspiece 3 and the previous section are released. , the lock between the right joint levers 11, 21, the other hand can hold the joint lever.
  • the lower ends of the left and right section bars 11, 21 of the previous section are in frictional contact with the inner faces 101, 121 of the left and right sleeves 10, 12 and the inner end faces of the left and right section bars 11, 21 of the next section, left and right sleeves.
  • the tubes 10 and 12 act as damping to prevent the left and right section rods 11, 21 of the upper section from moving too fast relative to the left and right section rods 11, 21 of the lower section, so as to avoid the strong collision between the adjacent rails 3
  • the crosspiece 3 is damaged, and the noise generated by the crosspiece 3 due to mutual collision can be reduced.

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

Abstract

L'invention concerne une échelle à coulisse comportant un montant gauche (1), un montant droit (2) et une pluralité de barreaux (3) s'étendant entre le montant gauche et le montant droit, le montant gauche et le montant droit comprenant plusieurs unités de montant gauche et de montant droit (11, 12) avec à leur tour des manchons coulissants. Un mécanisme de verrouillage gauche (4) et un mécanisme de verrouillage droit (5) ayant un bouton de commande gauche (6) et un bouton de commande droit (7) respectivement sont disposés à l'intérieur du barreau (3), le bouton de commande gauche (6) et le bouton de commande droit (7) étant disposés de manière proche sur la partie centrale du barreau (3), de sorte que les deux boutons de commande peuvent être actionnés d'une seule main pour déverrouiller les barreaux (3) sur l'unité correspondante de montant.
PCT/CN2009/000792 2008-08-14 2009-07-14 Échelle à coulisse WO2010017684A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09806287.0A EP2322752B1 (fr) 2008-08-14 2009-07-14 Echelle a coulisse
DK09806287.0T DK2322752T3 (da) 2008-08-14 2009-07-14 Udskydelig stige

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200820162785.2 2008-08-14
CNU2008201627852U CN201250602Y (zh) 2008-08-14 2008-08-14 一种伸缩梯

Publications (1)

Publication Number Publication Date
WO2010017684A1 true WO2010017684A1 (fr) 2010-02-18

Family

ID=40746276

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2009/000792 WO2010017684A1 (fr) 2008-08-14 2009-07-14 Échelle à coulisse

Country Status (4)

Country Link
EP (1) EP2322752B1 (fr)
CN (1) CN201250602Y (fr)
DK (1) DK2322752T3 (fr)
WO (1) WO2010017684A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
JP2013181343A (ja) * 2012-03-02 2013-09-12 Alinco Inc 作業台の伸縮脚ロック装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338649B (zh) * 2008-08-14 2011-02-09 王万兴 一种伸缩梯
CN201250602Y (zh) * 2008-08-14 2009-06-03 王万兴 一种伸缩梯
US10207881B2 (en) 2016-10-31 2019-02-19 Horizon Global Americas Inc. Telescoping ramp

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EP0527766B1 (fr) 1990-04-10 1996-06-05 Bertschi, Bruno Echelle escamotable
US7048094B2 (en) 2002-08-02 2006-05-23 Core Distribution, Inc. Extending ladder and associated manufacturing methods
CN2881052Y (zh) * 2006-02-08 2007-03-21 何海涛 伸缩梯
CN200971751Y (zh) * 2006-10-30 2007-11-07 范刚 一种伸缩梯的锁定装置
CN201047247Y (zh) * 2007-04-23 2008-04-16 简世坤 一种伸缩梯
CN201250602Y (zh) * 2008-08-14 2009-06-03 王万兴 一种伸缩梯

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US1712942A (en) * 1927-12-29 1929-05-14 Hiram K Smith Collapsible ladder
GB8717884D0 (en) * 1987-07-28 1987-09-03 Baker M R E Folding ladders
GB9403863D0 (en) * 1994-03-01 1994-04-20 Foxdale Dev Ltd Extensible ladder
GB2436584B (en) * 2006-03-30 2011-08-31 Norman William Liefke An extension ladder with improved mechanism
US7967110B2 (en) * 2006-07-27 2011-06-28 Werner Co. Tubular access ladder and method
CN200985738Y (zh) * 2006-11-27 2007-12-05 苏正平 一种伸缩梯

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Publication number Priority date Publication date Assignee Title
EP0527766B1 (fr) 1990-04-10 1996-06-05 Bertschi, Bruno Echelle escamotable
US7048094B2 (en) 2002-08-02 2006-05-23 Core Distribution, Inc. Extending ladder and associated manufacturing methods
CN2881052Y (zh) * 2006-02-08 2007-03-21 何海涛 伸缩梯
CN200971751Y (zh) * 2006-10-30 2007-11-07 范刚 一种伸缩梯的锁定装置
CN201047247Y (zh) * 2007-04-23 2008-04-16 简世坤 一种伸缩梯
CN201250602Y (zh) * 2008-08-14 2009-06-03 王万兴 一种伸缩梯

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Title
See also references of EP2322752A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013181343A (ja) * 2012-03-02 2013-09-12 Alinco Inc 作業台の伸縮脚ロック装置

Also Published As

Publication number Publication date
EP2322752B1 (fr) 2013-05-29
CN201250602Y (zh) 2009-06-03
DK2322752T3 (da) 2013-08-26
EP2322752A1 (fr) 2011-05-18
EP2322752A4 (fr) 2012-09-12

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