EP2378052A2 - Klappleiter - Google Patents

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Publication number
EP2378052A2
EP2378052A2 EP20110382109 EP11382109A EP2378052A2 EP 2378052 A2 EP2378052 A2 EP 2378052A2 EP 20110382109 EP20110382109 EP 20110382109 EP 11382109 A EP11382109 A EP 11382109A EP 2378052 A2 EP2378052 A2 EP 2378052A2
Authority
EP
European Patent Office
Prior art keywords
rungs
stile
stepladder
posts
folding
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.)
Withdrawn
Application number
EP20110382109
Other languages
English (en)
French (fr)
Inventor
Antonio Santos de la Torre
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.)
AJM Santos SLL
Original Assignee
AJM Santos SLL
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 AJM Santos SLL filed Critical AJM Santos SLL
Publication of EP2378052A2 publication Critical patent/EP2378052A2/de
Withdrawn legal-status Critical Current

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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
    • E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding
    • E06C1/3835—Foldable ladders in which the longitudinal members are brought together on folding having collapsible steps comprising a hinge in their central part

Definitions

  • This invention covers an enhanced folding trestle stepladder which can be folded on two planes in respect of an upper axis, and whose rungs or treads can also be folded, meaning that after being folded this forms a slim compact structure.
  • ES 284515 U discloses a folding portable stepladder in a single section, whose rungs are divided into two halves articulated with each other at the centre, and articulated to two lateral structures in a "U" shape.
  • the set of rungs has a central stay connecting all the rungs. It needs a lower bracket for supporting the lowest rung and the central stay.
  • ES 290028 U discloses a folding stepladder similar to the previous one, but which is provided with two planes folding with each other, each of these having a layout similar to the one in the utility model described above.
  • ES 291090 U discloses a folding stepladder, similar to the previous ones, but in which the central stay also constitutes a support leg for standing on the ground.
  • ES 293776 U discloses a folding stepladder with an upper support base that is also foldable.
  • ES 294026 U discloses a folding stepladder similar to the previous ones in which there is a bush for limiting the movement of the central stay.
  • ES 295824 U describes a folding stepladder similar to the previous ones, but in which the rear part is provided with a pair of support props articulated together half way up their height and to the rear side of the ladder structure.
  • stepladders the articulation of one of the parts of the rungs is inside the other part of said rungs. Furthermore none of said stepladders has any safety device preventing any total or partial unwanted folding of the rungs, for example when the stepladder has to be moved a few metres to go on with a particular job.
  • ES 1047652 U describes a folding stepladder in which the rungs are not divided into articulated halves.
  • the stepladder consists of one or two pairs of stile posts formed of "C" shaped profiles, with the gaps in these facing each other; each of the pairs constitutes one of the two planes forming the stepladder, forming an acute angle in respect of each other when this is in its open position.
  • at least one of the pairs comprises a set of rungs divided into two halves, each of said halves being formed of profiles in an inverted "U” shape, with the gap open downwards (in its open position).
  • the upper edges of said profiles comprise a lateral projection; the two halves are in turn connected to at least one central plate which constitutes an intermediate part for connection and articulation with a straight upper edge, so that when the rungs are opened up, the upper edge of the articulation piece rests on the upper edges of the profiles forming the step, preventing them from exceeding the predetermined position in their rotation.
  • the central plate surrounds the top of the connection of the pair of half-rungs, which will similarly limit the degree of rotation of said half-rungs. The central plate does not have any kind of connecting stay.
  • the two profiles constituting each rung have the same thickness, and are articulated on the inside to the respective "C" profiles constituting the stiles.
  • At least one of the half-rungs comprises a securing rod, in parallel and below its articulation axis, with the corresponding "C" profile which forms the relevant stile post.
  • a securing device for the rod of the half-rung which comprises a slide that can be operated by an exterior body, which has an inverted "U” profile on the inside, and which allows the rung to rotate freely when moved up, and when moved down confines and secures the rod of the half-rung, preventing its movement.
  • the slides of the half-rungs of each stile can be joined together, meaning that the movement of one of these necessarily forces the movement of the others.
  • the stile can similarly comprise support rods for the half-rungs.
  • the lower legs for support on the ground are set in the interior on each of the stile posts, and are able to articulate. When they have to open, said leg rotates inwards, then downwards and finally outwards, crossing a slot made in the outer lower end of each stile, and thus constituting an extension of the support base of the stepladder.
  • the opening of the two planes on stepladders with two planes takes place by means of articulation plates which join the stile posts on each of the sides.
  • This articulation plate will enable the two stiles to be placed in a parallel position after being folded.
  • the profile of one of the sides will form an angle equal to that of the stepladder opening, thus enabling perfect adjustment in the opening position between the support.
  • the opening angle of the two planes is limited by at least one safety strap, cable or chain. In the closed position, it has at least one closing hook, which articulates on one of the stile posts and is able to engage with a boss placed on the other, when the stepladder is folded.
  • At least one of the stiles is provided with a handle, which will be close to the centre of gravity of the stepladder in the folded position.
  • this invention consists of a folding stepladder (1) which in a first embodiment is fitted with a pair of stile posts (2) holding a set of rungs (7) folding to form a single plane.
  • the stepladder (1) is formed from two pairs of stile posts (2, 3), able to articulate with each other at the top, and preferentially both in respect of a connection and articulation piece (4), so that in the unfolded position said stile posts are located on two planes, one forward and one rear, which together form an acute angle.
  • the rear stile posts (3) have a top end (6) which is cut with a bevelled edge, so that these form an acute angle (5) at said top end (6).
  • the upper oblique plane acts as a support base on the front stiles when the stepladder (1) is unfolded, so that this forms a safety element preventing any excessive opening.
  • At least one of the pairs of stile posts (2) holds a set of rungs (7).
  • the stiles (2) holding the rungs (7) are made in a "C" shape, whose gaps are facing each other. Each of the gaps comprises a set of hinge pins (8) for articulation of the rungs.
  • Each of the rungs (7) is divided into two half-rungs (9) which are identical in shape and thickness. Each of the two half-rungs (9) forming a rung or tread (7) is joined to at least one central plate (10) which constitutes an intermediate part for joining and articulating said half-rungs (9) together.
  • the half-rungs (9) are formed of different profiles which have an inverted "U”-shaped section, and are articulated on the inside to the respective "C” profiles forming the stiles (2, 3).
  • the half-rungs have a lateral projection (11) on at least one portion of their upper edges; the central plate has in turn a substantially straight upper edge (12), and in the unfolded position of the rung (7) said upper edge (12) of said plate is able to rest on the lateral projection (11) of the half-rungs, thus establishing a rotation limit in the unfolding operation.
  • the central plate (10) surrounds the central portion of each of the two half-rungs (9) at the top and on both sides, so that the extent of rotation of said half-rungs (9) will similarly be limited.
  • At least one of the half-rungs (9), comprises a securing rod (13), set in parallel and under the rung's articulation axis (8) with the relevant "C" profile forming the corresponding stile (2, 3).
  • the stepladder also comprises at least one securing device (14) which holds the corresponding half-rung (9) in the unfolded position.
  • This securing device consists of a sliding part that can be manually operated from the outside of each stile post (2, 3) which holds the rungs (7), by means of an outer body connected with an inner body (15), allowing this to move along an elongated perforation.
  • the inner body (15) is made in the shape of a hook or part in an inverted "U" shape, so that when it is in its retention position (lower position), this prevents the rung from rotating in respect of its axis (8) and thus prevents the stepladder from folding, and in the release position (moved upwards) it will let the rung move freely.
  • the securing devices (14) of each stile could be joined together, so that operating one also moves the others.
  • the securing device is fitted with an outer part and an inner part.
  • the outer part of the securing device (14) is screwed onto the inner part, so that said inner part is able to move sideways depending on how far this is screwed on, from a free, unscrewed position, in which said securing device (14) can be freely moved upwards and downwards, to a screwed position (tightened) for securing, in which the inner part is retracted and forced towards the stile (2), so that this firmly holds a rod (16) of the half-rung (9), which will be described below.
  • Each of the stiles (2) can also comprise one or more support rods (16) for the half-rungs (9).
  • stepladder is firmly secured simultaneously by means of the lateral support of the half-rungs (9) on the stiles (2), by means of the support of the half-rungs (16) on the central plate (10), by means of the support of the half-rungs (9) against each other and by tightening this securing device through screwing pressure of the securing item (14), which pulls the rod (13) of the corresponding half-rung (9) towards the inner surface of the corresponding stile (2) until its movement is prevented, thus preventing the stepladder from swaying.
  • lower legs (17) are provided on the stepladder for supporting this on the floor, arranged in the interior of each of the stiles (2), and able to articulate in respect of these.
  • said lower legs (17) are moved towards the interior, then downwards and finally outwards, going through a slot (not shown) made in the outer lower end of each stile, and thus constituting an extension of the support base of the stepladder.
  • the opening of the two planes takes place by means of articulation plates (4) which join the stile posts (2, 3) on each of the sides.
  • Said articulation plate (4) will enable the two stiles to be placed in a parallel position after being folded.
  • the opening angle of the two planes will preferentially also be limited by at least one safety strap, cable or chain (20), which articulates in one of the stiles and is able to be secured on a boss (21) set in the other, when the stepladder is folded.
  • At least one of the stiles is fitted with a handle (22), which will be close to the centre of gravity of the stepladder in folded position.

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  • Ladders (AREA)
EP20110382109 2010-04-15 2011-04-13 Klappleiter Withdrawn EP2378052A2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201030550A ES2377615B1 (es) 2010-04-15 2010-04-15 Escalera plegable.

Publications (1)

Publication Number Publication Date
EP2378052A2 true EP2378052A2 (de) 2011-10-19

Family

ID=44069960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110382109 Withdrawn EP2378052A2 (de) 2010-04-15 2011-04-13 Klappleiter

Country Status (2)

Country Link
EP (1) EP2378052A2 (de)
ES (1) ES2377615B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103216190A (zh) * 2013-03-22 2013-07-24 浙江工业大学 折叠式爬梯
CN105134064A (zh) * 2015-08-28 2015-12-09 河南师范大学 一种双向折叠梯
GR1009386B (el) * 2017-10-09 2018-10-17 Ιωαννης Σταματιου Δασκαλακης Πτυσσομενη σκαλα τσεπης

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108386124B (zh) * 2018-04-03 2023-11-21 浙江易锻精密机械有限公司 一种大型压力机用安全梯

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES284515U (es) 1985-02-11 1985-07-01 Xalma Gomez Juan Soporte para enlosado de altura regulable
ES290028U (es) 1985-10-31 1986-03-01 Diaz Gascon Emilio Escalera doble portatil plegable
ES291090U (es) 1985-12-17 1986-04-16 Jimenez Sarmiento Ivan Enri Escalera de mano plegable
ES293776U (es) 1986-04-23 1986-08-16 Diaz Gascon Emilio Escalera plegable perfeccionada
ES294026U (es) 1986-05-07 1986-11-01 Diaz Gascon Emilio Escalera portatil plegable perfeccionada
ES295824U (es) 1984-04-25 1987-06-16 Stoltz Gerard Escalera plegable
ES1047652U (es) 2000-11-07 2001-05-01 Teyce S A Escalera de mano plegable

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US732295A (en) * 1902-07-12 1903-06-30 Gideon L Gustafson Folding ladder.
JPH0949383A (ja) * 1995-08-08 1997-02-18 Trinity Ind Corp 梯 子
KR100786724B1 (ko) * 2006-12-27 2007-12-21 전기태 선박용 절첩식 사다리
CN201258682Y (zh) * 2008-06-06 2009-06-17 杨农 折叠长梯

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES295824U (es) 1984-04-25 1987-06-16 Stoltz Gerard Escalera plegable
ES284515U (es) 1985-02-11 1985-07-01 Xalma Gomez Juan Soporte para enlosado de altura regulable
ES290028U (es) 1985-10-31 1986-03-01 Diaz Gascon Emilio Escalera doble portatil plegable
ES291090U (es) 1985-12-17 1986-04-16 Jimenez Sarmiento Ivan Enri Escalera de mano plegable
ES293776U (es) 1986-04-23 1986-08-16 Diaz Gascon Emilio Escalera plegable perfeccionada
ES294026U (es) 1986-05-07 1986-11-01 Diaz Gascon Emilio Escalera portatil plegable perfeccionada
ES1047652U (es) 2000-11-07 2001-05-01 Teyce S A Escalera de mano plegable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103216190A (zh) * 2013-03-22 2013-07-24 浙江工业大学 折叠式爬梯
CN105134064A (zh) * 2015-08-28 2015-12-09 河南师范大学 一种双向折叠梯
GR1009386B (el) * 2017-10-09 2018-10-17 Ιωαννης Σταματιου Δασκαλακης Πτυσσομενη σκαλα τσεπης

Also Published As

Publication number Publication date
ES2377615B1 (es) 2012-12-04
ES2377615A1 (es) 2012-03-29

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