WO2015018661A1 - Échelle télescopique - Google Patents

Échelle télescopique Download PDF

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Publication number
WO2015018661A1
WO2015018661A1 PCT/EP2014/066026 EP2014066026W WO2015018661A1 WO 2015018661 A1 WO2015018661 A1 WO 2015018661A1 EP 2014066026 W EP2014066026 W EP 2014066026W WO 2015018661 A1 WO2015018661 A1 WO 2015018661A1
Authority
WO
WIPO (PCT)
Prior art keywords
ladder
rung
section
bar
collapsible
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2014/066026
Other languages
English (en)
Inventor
Otto Martinus Nielsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Patentselskabet af 10 december 2010 ApS
Original Assignee
Patentselskabet af 10 december 2010 ApS
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 Patentselskabet af 10 december 2010 ApS filed Critical Patentselskabet af 10 december 2010 ApS
Publication of WO2015018661A1 publication Critical patent/WO2015018661A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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

Definitions

  • the present invention relates to a collapsible ladder of the type comprising U-shaped ladder sections being telescopically inserted in each other.
  • Ladders having collapsible and expandable ladder sections are used in order to make the ladder smaller for storage and transport purposes.
  • a collapsible ladder comprising ladder bars divided into sections interconnected by rungs.
  • each ladder section is provided retaining or locking mechanisms, designed to automatically release the upper ladder sections, when a rung reaches a lower rung. This means, that subsequent to the release of the lowermost ladder section, the following ladder sections are automatically released, whereby the ladder collapses.
  • the rungs are collapsing on top of each other, thereby generating a safety problem for the users hands and fingers.
  • a collapsible ladder comprising:
  • each or at least part of the ladder sections comprising two hollow ladder bars arranged parallel to each other and interconnected at an upper end by a rung, and each collapsible ladder section being telescopically inserted into a lower ladder section;
  • each ladder bar of a collapsible ladder section has a locking hole adjacent the lower end part of the ladder bar and an extension below the locking hole; wherein retaining mechanisms are provided in at least part of the rungs for locking the collapsible ladder sections relative to one another when the collapsible ladder sections are extended, each of or part of said retaining mechanisms comprising a locking pin, which can be brought into an extended and locked position in order to engage a corresponding locking hole provided in the ladder bar of a ladder section positioned there above, and each of or part of said retaining mechanisms further comprising a release part with a release lever or arm for retracting the locking pin from the locked position into the un-locked position; and
  • each actuating element being arranged for actuating a release lever of a retaining mechanism provided in the rung of an above positioned ladder section, and each of said actuating elements having an inner side face extending in a direction along a corresponding ladder bar of the above positioned ladder section.
  • an upper part or at least the upper part of an outer side face of the actuating element is inclined inward towards the ladder bar resulting in an acute angle a of not above 45° between the ladder bar and said upper part of the outer side face of the actuating element, or resulting in an acute angle a of not above 45° between the inner side face of the actuating element and said upper part of the outer side face of the actuating element.
  • the actuating element may urge the fingers or a body part of a user to be displaced laterally when the rung of the above ladder section is moving downwards when collapsing the ladder.
  • the inner side face of an actuating element extend fully along the corresponding ladder bar of the above positioned ladder section. It is within one or more embodiments of the invention that the release levers or arms of the retaining mechanisms of the above positioned ladder section has an at least partly inclined or convex end part for contacting the inclined upper part of the corresponding actuating elements of the lower ladder section. According to an embodiment of the invention then at least part of the collapsible ladder sections are provided with means for maintaining a safety distance between two adjacent rungs when collapsing the ladder. It is preferred that the height of the actuating elements is larger than or equal to the safety distance held between adjacent rungs of the collapsed ladder.
  • the safety distance may be is at least 15 mm, such as at least 20 mm, or such as at least 25mm.
  • at least part of the collapsible ladder sections may have spacers provided at the bottom of the rungs for maintaining said safety distance between two adjacent rungs when collapsing the ladder.
  • the rung spacers may have a height of at least 15 mm, such as at least 20 mm, or such as at least 25 mm, and the distance between a ladder bar and a rung spacer may be at least 80 mm.
  • the safety distance between two adjacent rungs of two adjacent collapsible ladder sections, a lower and an upper ladder section may be provided by a stopper plug being arranged at the bottom of each ladder bar of the lower and upper ladder sections, whereby the stopper plug of a ladder bar of the upper ladder section is stopped by the stopper plug of the ladder bar of the lower ladder section when collapsing the ladder.
  • the safety distance may be defined by the length of the ladder bars and the stopper plugs.
  • the acute angle a of the upper part of the actuating element is not above 40°, such as not above 35°, or such as not above 30°.
  • a locking pin is spring biased towards the extended position in order to engage the corresponding locking hole provided in the ladder bar of the ladder section positioned there above.
  • the present invention also covers embodiments wherein a connector is provided at each end of the rung of a collapsible ladder section for interconnecting the rung with the two ladder bars.
  • the actuating elements of a ladder section may be hold by a connector at the end of the rung.
  • the connectors and the actuating elements may be made of plastic.
  • the ladder bars are formed of circular tubing, which may be Aluminium tubing.
  • FIG. 1 is a front view of a partly collapsed ladder according to a first embodiment the present invention
  • Fig. 2 shows part of a cut-through upper rung with retaining mechanism for locking the above ladder section and part of a lower rung with an actuating element for un-locking the retaining mechanism of the upper rung according to an embodiment of the invention
  • Figs. 3a and 3b illustrate two different embodiments of a release part for use in the retaining mechanism of Fig. 2 according to an embodiment of the invention
  • Figs. 4a, 4b and 4c illustrate arrangements of the actuating element of Fig. 2 according to embodiments of the invention
  • Fig. 5 show a cut through of two collapsed ladder sections according to a second embodiment of the invention, where stopper plugs are arranged at the bottom of the ladder bars in order to provide a safety distance between the rungs of the collapsed sections.
  • FIG. 1 shows a partly collapsed ladder 100, where the ladder has a number of collapsible ladder sections with hollow ladder bars 101 a,b,c, 102a,b,c, arranged parallel to each other and interconnected at an upper end by a rung 103a,b,c.
  • the two uppermost ladder sections are collapsed while the third uppermost ladder section is in an extended and locked position.
  • Each collapsible ladder section is telescopically inserted into a lower ladder section.
  • the lowermost ladder section which is not a collapsible ladder section, also has a rung 103d for interconnecting the ladder bars 101 d, 102d.
  • Each rung 103a,b,c of the collapsible ladder sections has two spacers 104, 105 provided at the bottom side of the rung 103a.
  • the spacers 104, 105 will maintain a safety distance between the rungs 103a,b,c,d of the collapsed ladder.
  • the spacers 104, 105 have a height of 20 or 25 mm and the distance from a spacer 104 to the ladder bar 101 c is at least 80 mm.
  • this ladder 100 is collapsed, there will be a safety distance between the rungs 103a,b,c of 20 or 25 mm and a safety distance between the spacers 104, 105 and the ladder bars 101 c, 102c of 80 mm.
  • Actuating elements 106c,d and 107c,d for un-locking an above ladder section are
  • actuating elements 106d, 107d being arranged on top of the rung 103d and extending along or in the direction along the ladder bars 101 c, 102c, respectively, of the above ladder section.
  • actuating elements 106c, 107c are arranged on top of the rung 103c and extending along or in the direction along the ladder bars 101 b, 102b, respectively, of the above ladder section.
  • actuating elements 106, 107 for un-locking an above ladder section are arranged at the top of the rung 103 of a lower ladder section, then subsequent to un-locking a lower
  • the above ladder sections may automatically be released, whereby the ladder sections collapses, while at the same time keeping a safety distance between the collapsed rungs.
  • the rung 103d of the lowermost ladder section has no spacers but has release activating means 108, 109, which may be arranged on the front side of the rung 103d. If the ladder is fully extended, then activation of the release activating means 108,
  • Fig. 2 shows part of a cut-through upper rung 201 , which upper rung 201 in each side end has a retaining mechanism 202 for locking a ladder bar 203 of the above ladder section.
  • Fig. 2 also shows part of a lower rung 204 with an actuating element 205 for un-locking the retaining mechanism 202 of the upper rung 201.
  • the rung 201 is connected to a ladder bar 206 by a connector 207 and 30 the rung 204 is connected to a ladder bar 208 by a connector 209.
  • the ladder bar 203 is inserted in the ladder bar 206, and ladder bar 206 is inserted in the ladder bar 208.
  • the ladder bar 203 has a locking hole 210 and the retaining mechanism 202 has a corresponding locking pin 21 1 , which can be brought into an extended and locked position 35 in order to engage the locking hole 210.
  • the retaining mechanism 202 also has a release part 212 with a release lever or arm 213 for bringing the locking pin 21 1 into a retracted and un-locked position.
  • the retaining mechanism 202 further comprises a shell 214, being press-fitted into the rung 201 , where the shell 214 receives the locking pin 21 1 .
  • the locking pin 21 1 is displaceably mounted in the shell 214 and is in one end biased by a spring 215.
  • the locking pin 21 1 is provided with a waist or recess portion 216 in the mid portion of the locking pin 21 1.
  • the waist or recess portion 216 serves to receive the release part 212.
  • the release part 212 with the release lever or arm 213 may be pivotally mounted with a pivot or axis 219 to the rung 201 , and the upper part of the release part 212 is a connecting part, which may be forked shaped, and which claps or jams about the waist or recess 216 of the locking pin 21 1 .
  • the actuating element 205 is arranged on top of the rung 204 with an inner side face extending along the ladder bar 206 of the above positioned ladder section. It is preferred that the actuating element 205 is connected to or part of the connector 209.
  • the lower rung 204 also holds a retaining mechanism with locking pin 220, which can be brought into an extended and locked position in order to engage a locking hole (not shown) of ladder bar 206.
  • the retaining mechanism of rung 204 is a conventional type of retaining mechanism, where the locking pin 220 can be brought into an un-locked position by pressing a release button 221 , which is arranged at the front side of the rung 204.
  • An actuating element 222 is also provided on top of the rung 201 with an inner side face extending along the ladder bar 203 of the above positioned ladder section. Also here it is preferred that the actuating element 222 is connected to or part of the connector 207.
  • the present invention also covers embodiments wherein the acute angle a is not above 40°, such as not above 35°, or such as not above 30°.
  • actuating elements, 106, 107, 205, 222 By having actuating elements, 106, 107, 205, 222, arranged on the lower rungs, 103, 204, 201 , then it is possible to un-lock the above ladder sections and still maintain a safety distance between two adjacent rungs when collapsing the ladder.
  • the height of the actuating elements, 106, 107, 205, 222 shall be larger than or equal to the safety distance held between adjacent rungs of the collapsed ladder. If the release lever or arm 213 is fully inside the rung 201 , then the actuating element 205 should be higher than the safety distance.
  • actuating elements, 106, 107, 205, 222 shall bear the load of the collapsed ladder sections in order to maintain the safety distance.
  • spacers, 104, 105 may be provided at the bottom of the rungs of the above ladder sections in order to bear the load of the collapsed ladder sections.
  • stopper plugs may be provided at the bottom of the ladder bars, where the bottom of a stopper plug may rest on the top of a below stopper plug, and thereby bear the load of the collapsed ladder section. This is explained further in connection with Fig. 5.
  • FIG. 3a and 3b illustrates two different embodiments of a release part 212a, b for use in the retaining mechanism 202 of Fig. 2.
  • the release part 212a of Fig. 3a has a release lever or arm 213a with an inclined or at least partly inclined end part
  • the release part 212b of Fig. 3b has a release lever or arm 213b with a convex end part.
  • Figs. 4a, 4b and 4c illustrat arrangements of the actuating element 205 of Fig. 2.
  • the actuating element 205a, 205b, 205c is part of the connector 209, which
  • actuating element 205a is formed and arranged so that the inner side face fully extends along the ladder bar 206 of the above ladder section, where the ladder bar 206 is inserted into the ladder bar 208.
  • actuating element 205b is formed
  • the top end of the actuating element 205a, 205b, 205c may have no rounded end or plane upper part as shown by element 205a in Fig. 4a, but the top end may also be rounded as shown by element 205b of Fig. 4b, or the top end may have a cut off or plane
  • top end or an upper part of the element 205a, 205b, 205c is tapering upwards and forming the acute angle a between the inner side face and the outer side face of the actuating element, where a is not above 45°, such as not above 40°, such as not above 35°, or such as not above 30°.
  • Fig. 5 show a cut through of two collapsed ladder sections according to a second embodiment of the invention, where stopper plugs are arranged at the bottom of the ladder bars in order to provide a safety distance between the rungs of the collapsed sections.
  • a lower ladder section holds a lower rung 501 and a lower ladder bar
  • a lower stopper plug 505 is provided at the bottom of the lower ladder bar 502, and an upper stopper plug 506 is provided at the upper ladder bar 504.
  • the bottom of upper stopper plug 506 is stopped or resting on the top of the lower stopper plug 505, leaving a safety distance d between the lower
  • the safety distance d is defined by the length of the ladder bars 502, 504 and the length of the stopper plugs 505, 506. It is preferred that the safety distance d is at least 20 mm, such as at least 25 mm.
  • a connector 207 is provided at each end of the 35 rung 201 of a collapsible ladder section for interconnecting the rung 201with the two ladder bars 206.
  • the actuating elements 222 of a ladder section may be hold by the connector 207 at the end of the rung 201.
  • the connectors 2207 and the actuating elements 222 may be made of plastic.
  • the locking pin 21 1 is made of stainless steel, while the release part 212 with the release lever or arm 213 and the shell 214 are made of plastic.
  • the ladder bars 203, 205 are formed of Aluminium tubing, which may be circular tubing. It is further preferred that the rungs 201 , 204 are made of Aluminium.

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  • Ladders (AREA)

Abstract

L'invention porte sur une échelle télescopique ayant plusieurs sections d'échelle télescopique, chacune ou au moins une partie des sections d'échelle comprenant deux barres d'échelle creuses disposées parallèlement l'une à l'autre et reliées entre elles à une extrémité supérieure par un échelon, et chaque section d'échelle télescopique étant insérée de façon télescopique dans une section d'échelle inférieure. Chaque barre d'échelle d'une section d'échelle télescopique comprend un trou de verrouillage adjacent à la partie d'extrémité inférieure de la barre d'échelle et une extension en dessous du trou de verrouillage. Des mécanismes de retenue sont situés dans au moins une partie des échelons pour verrouiller les sections d'échelle télescopique l'une par rapport à l'autre, lorsque les sections d'échelle télescopique sont étendues, chacun ou une partie desdits mécanismes de retenue comprenant une goupille de verrouillage qui peut être amenée dans une position étendue et verrouillée afin de s'engager dans un trou de verrouillage correspondant formé dans la barre d'échelle d'une section d'échelle positionnée au-dessus de celui-ci, et chacun ou une partie desdits mécanismes de retenue comprenant en outre une partie de libération ayant un levier ou bras de libération pour rétracter la goupille de verrouillage de la position verrouillée à la position déverrouillée. Pour au moins une section d'échelle inférieure, deux éléments d'actionnement sont situés sur le dessus de l'échelon de la section d'échelle inférieure, un élément d'actionnement étant à chaque extrémité de l'échelon, ledit élément d'actionnement étant agencé pour actionner un levier de libération d'un mécanisme de retenue situé dans l'échelon d'une section d'échelle positionnée au-dessus, et chacun desdits éléments d'actionnement ayant une face latérale intérieure s'étendant dans une direction le long d'une barre d'échelle correspondante de la section d'échelle positionnée au-dessus. Il est préféré qu'une partie supérieure d'une face latérale extérieure de l'élément d'actionnement soit inclinée vers l'intérieur vers la barre d'échelle, conduisant à un angle aigu α qui n'est pas supérieur à 45° entre la barre d'échelle et la partie supérieure de la face latérale extérieure de l'élément d'actionnement. Ainsi, l'élément d'actionnement peut pousser les doigts ou une partie corporelle d'un utilisateur à se déplacer latéralement lorsque l'échelon de la section d'échelle supérieure se déplace vers le bas lors du pliage de l'échelle. Il est également préféré que les leviers ou bras de libération de la section d'échelle positionnée au-dessus aient une partie d'extrémité au moins partiellement inclinée ou convexe pour entrer en contact avec la partie supérieure inclinée des éléments d'actionnement correspondants de la section d'échelle inférieure.
PCT/EP2014/066026 2013-08-09 2014-07-25 Échelle télescopique Ceased WO2015018661A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DKPA201300456 2013-08-09
DKPA201300456 2013-08-09
DKPA201300686 2013-12-11
DKPA201300686 2013-12-11

Publications (1)

Publication Number Publication Date
WO2015018661A1 true WO2015018661A1 (fr) 2015-02-12

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ID=51229900

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/066026 Ceased WO2015018661A1 (fr) 2013-08-09 2014-07-25 Échelle télescopique

Country Status (2)

Country Link
DE (1) DE202014010305U1 (fr)
WO (1) WO2015018661A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104727735A (zh) * 2015-02-24 2015-06-24 徐園植 园林专用梯
CN107420025A (zh) * 2017-08-30 2017-12-01 国家电网公司 便携式阻尼伸缩梯
FR3057600A1 (fr) * 2016-10-19 2018-04-20 Zhuhai Quan Da Industry & Commerce Co., Ltd Echelle telescopique
US10480245B2 (en) * 2014-08-18 2019-11-19 Lampe Holding B.V. Telescopic ladder assembly

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527766A1 (fr) * 1990-04-10 1993-02-24 Safescape Ltd Echelle escamotable.
US5495915A (en) * 1990-04-10 1996-03-05 Charles A. McDonnell Collapsible ladder
CN201495980U (zh) * 2009-09-21 2010-06-02 应筱萍 一种可防夹手的伸缩梯
DE202011051394U1 (de) * 2011-02-02 2011-10-13 Patentselskabet Af 10. December 2010 Aps Zusammenlegbare Leiter
DE102011001227A1 (de) * 2011-03-11 2012-09-13 Ergobionik Gmbh Teleskopierbare Leiter
DE202012104992U1 (de) * 2012-12-20 2013-01-15 Xiaoling Chen Teleskopleiter
CN102278059B (zh) * 2011-07-08 2013-06-05 王万兴 一种具有防夹手装置的伸缩梯

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7316293B2 (en) 2006-05-17 2008-01-08 Norman William Liefke Extension ladder with improved mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527766A1 (fr) * 1990-04-10 1993-02-24 Safescape Ltd Echelle escamotable.
US5495915A (en) * 1990-04-10 1996-03-05 Charles A. McDonnell Collapsible ladder
CN201495980U (zh) * 2009-09-21 2010-06-02 应筱萍 一种可防夹手的伸缩梯
DE202011051394U1 (de) * 2011-02-02 2011-10-13 Patentselskabet Af 10. December 2010 Aps Zusammenlegbare Leiter
DE102011001227A1 (de) * 2011-03-11 2012-09-13 Ergobionik Gmbh Teleskopierbare Leiter
CN102278059B (zh) * 2011-07-08 2013-06-05 王万兴 一种具有防夹手装置的伸缩梯
DE202012104992U1 (de) * 2012-12-20 2013-01-15 Xiaoling Chen Teleskopleiter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10480245B2 (en) * 2014-08-18 2019-11-19 Lampe Holding B.V. Telescopic ladder assembly
CN104727735A (zh) * 2015-02-24 2015-06-24 徐園植 园林专用梯
FR3057600A1 (fr) * 2016-10-19 2018-04-20 Zhuhai Quan Da Industry & Commerce Co., Ltd Echelle telescopique
CN107420025A (zh) * 2017-08-30 2017-12-01 国家电网公司 便携式阻尼伸缩梯

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