CN102227540A - Reinforced collapsible ladder - Google Patents

Reinforced collapsible ladder Download PDF

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Publication number
CN102227540A
CN102227540A CN2009801479947A CN200980147994A CN102227540A CN 102227540 A CN102227540 A CN 102227540A CN 2009801479947 A CN2009801479947 A CN 2009801479947A CN 200980147994 A CN200980147994 A CN 200980147994A CN 102227540 A CN102227540 A CN 102227540A
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CN
China
Prior art keywords
stile
ladder
pin
folding ladder
locking mechanism
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.)
Pending
Application number
CN2009801479947A
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Chinese (zh)
Inventor
A·温布拉德
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Telesteps AB
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Telesteps AB
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Publication date
Application filed by Telesteps AB filed Critical Telesteps AB
Publication of CN102227540A publication Critical patent/CN102227540A/en
Pending legal-status Critical Current

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    • 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

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  • Ladders (AREA)

Abstract

A collapsible ladder (100) comprises a number of stile sections (130a, 130b, 150a, 150b) interconnected by ladder steps (110c, 110d, 110e) to form U-shaped ladder sections. Adjacent stile sections have inner and outer diameters arranged to allow telescopic insertion into one another, and the stile sections have a length at least equaling twice the distance between two adjacent ladder steps when the ladder is in an extended position.

Description

The folding ladder of strengthening
Technical field
The present invention relates to a kind of folding ladder, this folding ladder comprises a plurality of stile portions (stile section), this a plurality of stile portion is connected to each other by stile (ladder step), to form U-shaped section of ladder (ladder section), wherein adjacent stile portion has interior diameter and external diameter, and this interior diameter and external diameter are suitable for allowing described adjacent stile portion telescopically to insert mutually.
Background technology
There have been a lot of years in various types of folding ladder on market, and occupy the very big market share.Compare with common ladder, folding ladder is easy to load, and can transport easy and conveniently.
Folding ladder generally include two abreast, telescopically the elongation collapsible stile, these two collapsible stiles are connected to each other by a plurality of stiles.Described stile links to each other with the top of the part of stile usually, and this part can be inserted in the lower part on estable ground.
In for example EP 1 516 999 and EP 0 527 766, can find the exemplary of folding ladder in the prior art.Can see that in these patents the section of ladder of this folding ladder comprises a plurality of U-shaped portion, the pillar (stanchion) of described U-shaped portion is a stile portion, and the bottom of described U-shaped portion is a stile.The stile portion on top is assemblied in the stile portion of bottom, and the stile portion on top keeps in position by the spring loaded pin in the stile that is arranged on the bottom (spring loaded pin), and when folding ladder was in extended position, spring loaded pin extended through the hole in the stile portion that is arranged on top.When folding ladder was in extended position, the stile portion on top extended beyond about 15 centimetres of the stile of bottom, or about half of the distance between adjacent two stiles of the stile that surpasses the bottom.
For existing folding ladder is locked in extended position, can use multiple known locking mechanism; This locking mechanism both can be the mechanism (as shown in EP 0 527 766) that allows auto-folder, also can be to allow manually folding mechanism (as shown in EP 1 516 999).Another kind of locking mechanism (shown in DE 196 53 003C2) comprises the pin of outside elongation, and this pin is arranged in the lower end of described stile portion.This pin matches with opening in the outer terraced bar portion, so that described stile portion is relative to each other locked.
Yet a problem of folding ladder of the prior art is that for long ladder, the rigidity of folding ladder of the prior art is low excessively; The brainstrusts of a lot of countries require to pay close attention to that ends are horizontal and mid portion bears the amount of deflection of the folding ladder of elongation fully of weight.Although folding ladder of the prior art is easy to use, and can be effectively folded into less size,, verified, folding ladder of the prior art is difficult to be designed to by growing of deflection test terraced.
The possible problem of another of folding ladder of the prior art is to have the less risk of folding described folding ladder unintentionally.In existing folding ladder, exist the user may operate the less risk of the pin of a stile simultaneously.This operation simultaneously may cause described folding ladder to be folded unintentionally.
Consider above-mentioned defective, the object of the present invention is to provide a kind of increase rigidity (promptly low amount of deflection) and increase safety to prevent folding unintentionally folding ladder.
Summary of the invention
According to the present invention, realize above-mentioned and other purposes by a kind of ladder, wherein when described ladder was in the extended position, the length of at least some stile portions of described ladder was the twice at least of distance between adjacent two stiles.
In one embodiment of the invention, locking mechanism can be arranged in the described stile, and described locking mechanism can comprise spring loaded pin, this spring loaded pin be suitable for by be arranged at least one stile portion in the hole cooperate this at least one stile portion that locks, in this at least one stile portion inserts with the stile that comprises described locking mechanism links to each other stile portion.
In addition, in order to be top section of ladder slot milling, initial part can be set when described ladder is in folded state, this initial part comprises two initial stiles, and these two initial stiles interconnect by last stile, middle stile and following stile.For this embodiment, locking mechanism can be arranged in the stile.
In order to alleviate the problem that described ladder is folded unintentionally, locking mechanism can be arranged in the described middle stile.Folding in order to reduce, be set to described in the middle of the opening that cooperates of the pin of described locking mechanism of stile can be rectangle or ellipse (oblong), move under the situation of not recalling pin, to allow carrying out some.
Allow the ladder of auto-folder if desired, described locking mechanism can comprise lever, and this lever is connected to is recalling described spring loaded pin when adjacent stile engages.
Description of drawings
Hereinafter, present invention is described with reference to the accompanying drawings, wherein:
Fig. 1 is the schematic elevational view of ladder according to the present invention when being in extended position;
Fig. 2 is the schematic side elevation of the amplification of the stile portion of the ladder in the exploded view 1 and locking mechanism; With
Fig. 3 is the schematic diagram that is in section of ladder included in the ladder of extended position and this ladder.
The specific embodiment
In Fig. 1, showed folding ladder 100 according to one embodiment of the present invention.The folding ladder of showing is in extended position, and this folding ladder comprises a plurality of stile 110a-110n (n=g, but can use the stile of any fair amount in the embodiment shown).Stile 110a-c firmly is connected with two initial stiles or terraced bar (ladder bar) 120a, 120b.The bottom 120 of stile 110a-c and two initial stile 120a, 120b formation ladder shapes.Step (rung) 110c is provided with locking tool 111,114, and each described locking tool 111,114 all comprises pin 112a, and this pin 112a quilt is towards extended position spring bias voltage.In the embodiment shown, can recall pin 112a by draw ring 111,113.
Comprise stile 110d for first collapsible 130, this stile 110d firmly is connected with the upper end of two 130a of stile portion, 130b, to form the U-shaped section of ladder.The 130a of stile portion, 130b insert among initial stile 120a, the 120b.Lower end at the 130a of stile portion, 130b is fastened with damper 140a, 140b.Shown in position (being extended position), the 130a of stile portion, 130b extend beyond stile 110c and stile 110b in initial stile.By hole (not shown) among the 130a of stile portion, the 130b and the interaction between pin 112a, the 112b 130a of stile portion, 130b are remained on the appropriate location.Length for the stile of understanding section of ladder better sees also Fig. 3, has wherein showed the part of the folding ladder 100 that is in extended position, and has showed the section of ladder that comprises the 130a of stile portion, 130b and stile 110d on folding ladder 100 next doors.
Comprise stile 110e for second collapsible 150, this stile 110e is connected with the upper end of the 150a of stile portion, 150b.The 150a of stile portion, 150b stretch among the 130a of stile portion, the 130b through stile 110d and 110c.Respectively by with hole that pin 112a and 112b engage between interaction and with interaction between the hole that pin 142a, 142b engage the 150a of stile portion, 150b are remained on the appropriate location.
Can make the hole among pin 112a, 112b and the 130a of stile portion, 130b and the 150a of stile portion, the 150b break away from interaction by pulling ring 111,113.Otherwise by the interaction between lever 143a, 143b and the stile 110c, pin 142a, 142b can break away from interaction with the hole that is arranged among the 150a of stile portion, the 150b.
For folding folding ladder 100, the user can spur ring 111,113.As mentioned above, spur described ring and pin 112a, 112b will be done recall mobile, this is recalled to move pin 112a, the 112b hole from be arranged on the 130a of stile portion, 130b, 150a and 150b will be thrown off.The 130a of stile portion, 130b will can move freely subsequently and enter initial stile 120a, 120b.Because the 150a of stile portion, 150b remain on the appropriate location by pin 142a, 142b with interaction between the hole that this pin 142a, 142b align, so the 150a of stile portion, 150b will can not discharge from the 130a of stile portion, 130b.Therefore, have only the 130a of stile portion, 130b by pulling ring 111, the 113 stile portions that discharged at first.
After being released, the 130a of stile portion, 130b will under the effect of for example gravity, move into initial stile 120a, 120b.Because the 130a of stile portion, 130b almost completely insert described initial part, so stile 110c will contact with lever 143a, 143b, corresponding hole is disengaged among pin 142a, 142b and the 150a of stile portion, the 150b thereby make. Pin 142a, 142b withdraw from the release stile 150a of portion, 150b from the corresponding hole of the 150a of stile portion, 150b.
Equally, recall pin 142a, 142b release is fastened on stile portion on the stile 110f, but, identical with aforesaid way, the stile portion that is fastened on the stile 110f will remain on the appropriate location by the pin that is arranged in stile 110e, till stile 110e contact stile 110d, thereby operating lever 163a, 163b are to recall the pin that links to each other with described lever.The stile portion of top will repeat above-mentioned action, till described folding ladder is folding fully.
A key character according to folding ladder of the present invention is, compares with the folding ladder of prior art, has reduced the risk of folding described folding ladder unintentionally; In existing folding ladder, operating lever on any one stile just is enough to all above-mentioned stiles portion folding.Yet in folding ladder according to the present invention, only operating a lever on the stile can not be folding with folding ladder.On the contrary, for folding described folding ladder, must operate the lever on adjacent two stiles simultaneously.Yet this situation with ring 111,113 is different, because described ring is connected with pin 112a, 112b, pin 112a, 112b are only pins of the locking stile 130a of portion, 130b.
In Fig. 2, with the form of amplifying showed three stile 110n, 110m, 110l and with these three stile 110n, 110m, the corresponding stile 170n of portion of 110l, 170m and 170l.Equally, damper 173 and the horizontal actuator 143m, the 143l that are connected with pin 142m, 142l have been showed.As we know from the figure, the 170n of stile portion extend past pin 142m and 142l, that is, when described folding ladder was in elongation state, the length of stile portion was greater than the twice of distance between two stiles.
Refer again to Fig. 1, in another embodiment of the invention, each locking mechanism all comprises pin, certain is made as mechanism and the 130a of stile portion that recalls described pin, the hole among the 130b, and described each locking mechanism can be arranged among the stile 110b.By this mechanism is set, to can not cause the 130a of stile portion, 130b to discharge owing to be arranged in the pin of stile 110b and the actuating of any one of pin 112a, 112b, so avoided owing to recall the accident of the section of ladder 130 that pin 112a and 112b cause and fold from initial stile 120a, 120b.Have only the pin of recalling pin 112a, 112b simultaneously and being arranged in stile 110b could discharge the 130a of stile portion, 130b.
Still in another embodiment, be arranged in the 130a of stile portion, 130b, to be set to and to be arranged in the hole that the pin joint of stile 110b closes be rectangle or oval-shaped, therefore do not recall described pin and allow between the 130a of stile portion, 130b and initial stile 120a, the 120b some to move yet.By present embodiment, can discharge described folding ladder by two steps: in a first step, pulling ring 111,113, corresponding hole breaks away from interaction among pin 112a, 112b and the 130a of stile portion, the 130b thereby make.Because the hole of matching with the pin that is arranged in stile 110b is rectangle or oval-shaped, the 130a of stile portion, 130b can move a certain distance and enter among initial stile 120a, the 120b.Should move will cause with the corresponding hole of pin 112a, 112b move into this pin 112a, 112b decentraction (off-center), and therefore, after the power of recalling discharged, described pin will not engage with described hole, and described spring promotes described pin towards the 130a of stile portion, 130b.In second step, the pin that is arranged in stile 110b is withdrawn, and the 130a of stile portion, 130b are released afterwards, can insert described initial part fully.After the 130a of stile portion, 130b inserted fully, the section of ladder of top will discharge in the mode identical with aforesaid way.
Still in another embodiment of the invention, stile portion is provided with outwards outstanding locking mechanism, that is, the pin of described locking mechanism is outstanding from the stile portion that is arranged in big stile portion by the opening in the big stile portion.Can in DE 196 53 003C2 for example, find the example of this locking mechanism.
Adapt to folding ladder of the present invention in order to make according to the locking mechanism among DE 196 53 003C2, no matter three section of ladders are overlapped somewhere, must in two stile portions opening be set all.This makes the same safe with previously described any one embodiment according to the ladder of present embodiment, and is folding unintentionally to prevent.
Should be noted in the discussion above that under the situation that does not break away from the scope of the invention (defined scope in as claims), can carry out multiple modification described embodiment.

Claims (7)

1. a folding ladder (100), this folding ladder (100) comprises a plurality of stile (130a of portion, 130b, 150a, 150b), these a plurality of stile (130a of portion, 130b, 150a, 150b) by stile (110c, 110d, 110e) be connected to each other, to form the U-shaped section of ladder, wherein, adjacent stile portion has interior diameter and external diameter, this interior diameter and external diameter are set to allow described adjacent stile portion telescopically to insert mutually, it is characterized in that, when described folding ladder (100) when being in extended position, at least some described stile (130a of portion, 130b, 150a, length 150b) equals adjacent two described stile (110c at least, 110d, the twice of distance 110e).
2. folding ladder according to claim 1, wherein, be provided with locking mechanism (112) in the described stile, this locking mechanism (112) comprises spring loaded pin (112a), this spring loaded pin (112a) be suitable for by be arranged at least one stile portion in the hole cooperate this at least one stile portion that locks, in this at least one stile portion inserts with the stile that comprises described locking mechanism links to each other stile portion.
3. according to above-mentioned any described folding ladder of claim, this folding ladder also comprises initial part, this initial part comprises two initial stiles (120a, 120b), and these two initial stiles (120a, 120b) interconnect by last stile (110c), middle stile (110b) and following stile (110b).
4. folding ladder according to claim 3, wherein, described locking mechanism (112) is arranged on described going up in the stile (110c).
5. folding ladder according to claim 4, wherein, described locking mechanism is arranged in the described middle stile (110b).
6. according to above-mentioned any described stile of claim, wherein, described locking mechanism comprises lever (143a, 143b), and this lever (143a, 143b) is connected to is recalling described spring loaded pin (112) when adjacent stile engages.
7. folding ladder according to claim 5, wherein, be set to described in the middle of the opening that matches of the pin of locking mechanism of stile (110b) be rectangle or oval-shaped, move under the situation of not recalling described pin, to allow carrying out some.
CN2009801479947A 2008-12-02 2009-12-02 Reinforced collapsible ladder Pending CN102227540A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0850113-2 2008-12-02
SE0850113 2008-12-02
PCT/EP2009/066266 WO2010063772A1 (en) 2008-12-02 2009-12-02 Reinforced collapsible ladder

Publications (1)

Publication Number Publication Date
CN102227540A true CN102227540A (en) 2011-10-26

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Application Number Title Priority Date Filing Date
CN2009801479947A Pending CN102227540A (en) 2008-12-02 2009-12-02 Reinforced collapsible ladder

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EP (1) EP2370656B1 (en)
CN (1) CN102227540A (en)
DK (1) DK2370656T3 (en)
ES (1) ES2440923T3 (en)
WO (1) WO2010063772A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011051394U1 (en) * 2011-02-02 2011-10-13 Patentselskabet Af 10. December 2010 Aps Collapsible ladder

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1712942A (en) * 1927-12-29 1929-05-14 Hiram K Smith Collapsible ladder
US4119177A (en) * 1977-11-10 1978-10-10 Bengt Heimer Andersson Collapsible ladder
CN2610056Y (en) * 2003-04-08 2004-04-07 钱贤平 Telescopic ladder
CN101050687A (en) * 2007-05-22 2007-10-10 王克诚 Telescopic ladder and its vertical combined ladder, platform high stool and herringbone ladder
CN101223332A (en) * 2005-06-01 2008-07-16 泰利斯泰普斯股份公司 Collapsible ladder with locking mechanism
CN201087692Y (en) * 2007-08-16 2008-07-16 梁国耀 Multi-functional folding ladder connector

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2750535A1 (en) * 1977-11-11 1979-05-17 Heimer Andersson Collapsible ladder with telescoping uprights - has end portions of rungs displaceable along guideways in uprights with stops defining lower terminal positions

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1712942A (en) * 1927-12-29 1929-05-14 Hiram K Smith Collapsible ladder
US4119177A (en) * 1977-11-10 1978-10-10 Bengt Heimer Andersson Collapsible ladder
CN2610056Y (en) * 2003-04-08 2004-04-07 钱贤平 Telescopic ladder
CN101223332A (en) * 2005-06-01 2008-07-16 泰利斯泰普斯股份公司 Collapsible ladder with locking mechanism
CN101050687A (en) * 2007-05-22 2007-10-10 王克诚 Telescopic ladder and its vertical combined ladder, platform high stool and herringbone ladder
CN201087692Y (en) * 2007-08-16 2008-07-16 梁国耀 Multi-functional folding ladder connector

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Publication number Publication date
DK2370656T3 (en) 2014-01-20
ES2440923T3 (en) 2014-01-31
EP2370656A1 (en) 2011-10-05
EP2370656B1 (en) 2013-10-09
WO2010063772A1 (en) 2010-06-10

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Application publication date: 20111026