EP0964976A1 - Auszugsleiter - Google Patents
AuszugsleiterInfo
- Publication number
- EP0964976A1 EP0964976A1 EP98909464A EP98909464A EP0964976A1 EP 0964976 A1 EP0964976 A1 EP 0964976A1 EP 98909464 A EP98909464 A EP 98909464A EP 98909464 A EP98909464 A EP 98909464A EP 0964976 A1 EP0964976 A1 EP 0964976A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide
- locking bolt
- flange
- ladder according
- conductor element
- 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.)
- Granted
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
-
- 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
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
- E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
- E06C1/22—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles with extensible, e.g. telescopic, ladder parts or struts
-
- 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
- E06C1/32—Ladders with a strut which is formed as a ladder and can be secured in line with the ladder
Definitions
- the invention relates to a pull-out ladder, the ladder elements of which can be extended telescopically by means of rails which can be displaced on them, the rails being able to be fixed in several positions on the respective associated ladder element on one of their rungs, which is designed as a hollow profile, by means of a lock which has a locking bolt which can be inserted into the hollow profile of the rung and locked in this position under the action of an adjusting spring and with a handle, and furthermore the locking bolt fixed to the handle is axially movably mounted in a guide socket attached to the conductor element.
- the guide socket for the locking bolt is formed on a flange piece which is riveted or screwed to the respective conductor element.
- the object of the invention is to provide a pull-out ladder of the type specified in the to form that such a guide socket can be held in a simple manner on the conductor element provided, without the need for an expensive rivet or screw connection. Nevertheless, such a holder should offer a corresponding permanent security against a self-loosening of the connection.
- the object is achieved in that the guide connector can be fastened to the conductor element by means of a bayonet catch.
- a holder of the guide socket designed in this way can be produced with a single handle.
- the elements of the bayonet catch can be provided without difficulty and additional effort in the manufacture of the guide socket and the conductor element, as will become clear from the details described in more detail below.
- the bayonet catch consists of a guide flange provided on the end of the guide stub and a counter flange which concentrically surrounds a guide bore for the guide stub in the guide element, the guide flange being able to have at least three retaining cams which are flat Complementary holding recesses of the counter flange can be made and, after the guide flange has been rotated axially against the counter flange, rest against the end face thereof which faces away from the guide connector, an annular collar of the guide connector striking the guide element, defining the axial introduction of the guide flange into the guide element.
- the counter flange consequently consists solely of the holding recesses, which expand the guide bore in the conductor element radially outwards, and it is therefore according to no separate component, but only a defined area of the conductor element.
- the guide flange is not an obstacle in the course of the displacement of the spar on the conductor element if, as is customary, the web of the spar is guided at a distance from the web of the conductor element, which is usually already desired for other reasons. So the ends of the rungs always protrude slightly above the web of the spar, to which they are usually crimped or connected in some other way, so that this projection requires a certain distance between the webs anyway.
- the ladder elements are therefore equipped with leading edges that determine the distance between the respective spars.
- a position-securing lock is available for the bayonet lock, for example in such a way that an eyelet piece with an axially parallel first pin bore for a locking pin is provided on the circumference of the guide socket, which pin in a second pin bore aligned with the first the conductor element is foldable.
- the second pin bore is designed in such a way that the locking pin can only be driven in if a secure bayonet lock has been produced, that is to say if the guide socket has been correspondingly rotated after the guide flange has been inserted into the counter flange.
- the locking bolt is best tubular and connected to the handle, preferably donates so that it can be changed by direct manual operation between its axial position corresponding to the locking or unlocking.
- an anti-rotation device can be provided between the guide socket and the locking bolt (and thus also the handle).
- the anti-rotation lock is not complete and cannot be released, but if it permits - albeit limited - rotation of the locking bolt (and this only in its position removed from the rungs).
- It can advantageously consist of a cross pin fastened in the guide socket and an axially parallel guide groove in the locking bolt which is penetrated by the cross pin.
- the guide groove has a preferably acute-angled lateral bend.
- the invention has created an arrangement in which the guide socket can be attached quickly and securely to the conductor element and in which, in addition, it is ensured in a simple manner that the unlocking of the locking bolt can be converted into a stable operational position, so that the Locking bolt loaded on the one hand does not hinder the adjustment of the associated spar and on the other hand does not have to be held in place during such adjustment.
- the pull-out ladder is therefore efficient to manufacture and easy to handle.
- Fig. 2 shows a detail A from FIG. 1, enlarged and with the spar locked and
- Fig. 4 shows a guide stub according to the invention in the main view (Fig. 4a) and (Fig. 4b) a section B-B of Fig. 4a and
- FIG. 6 a locking bolt and a handle according to the invention in the main view
- a pull-out ladder first consists of ladder elements 1 with footrests 11.
- Spars 2 can be moved on the ladder elements 1, which in the exemplary embodiment are connected in pairs with joints 21 and form a folding ladder together with the ladder elements 1.
- the ladder elements 1 and the spars 2 enable different working lengths of the extension ladder due to their mutual telescopic displacement.
- the spars 2 are in pairs with each other by rungs 22 Extract pieces 20 connected; the conductor elements 1 are similarly assembled in pairs by rungs 12 into conductor pieces 10.
- the ladder and pull-out pieces 10, 20 of the pull-out ladder shown in the use position in FIG. 1 are folded and pushed for transport and storage.
- a locking device 3 is provided on each pairing of a ladder element 1 and a spar 2, as can be clearly seen in the enlarged illustration of FIG. 2; 3 shows the details of such a lock.
- the spar 2 is locked on the conductor element 1 by a locking bolt 31 which can be axially displaced by hand and which can be inserted into the cross section of one of the rungs 22 designed as hollow profiles and can also be removed from this position. Both the locking and the unlocked position of the locking bolt 31 is designed as a stable locking, as will be shown later. The details are shown in FIG. 3.
- the essentially tubular locking bolt 31 is axially and - to a limited extent - also radially movable in a guide stub 32.
- the guide stub 32 is provided with a bearing bore 32a (FIG. 4b).
- Axial parallel guide grooves 31a (FIG. 5) in the locking bolt 31 are penetrated by a transverse pin 32b which, indicated in FIG. 4, is pinned to the guide stub 32 by means of pin bores 32c after the locking bolt 31 has been inserted therein.
- the axial mobility of the locking bolt 31 is thus by the length 1 of the guide grooves 31a.
- one or two short transverse pins 32b can also be used, which are only driven into the area of the guide groove 31a.
- the guide groove 31a and the transverse pin 32b accordingly form an anti-rotation device 31a; 32b of the locking bolt 31.
- An end face of the locking bolt 31 on its side immersed in the rungs 22 is at least partially closed by an end wall 31c, for example, flanged onto its hollow cylindrical body 31b; the end wall 31c (Fig. 5) is somewhat curved, so that the insertion of the locking bolt 31 into the hollow profile of a rung 22 is facilitated, and serves as an axial fixed bearing for a spring 33 immersed in the locking bolt 31 (Fig. 3), the loads the locking bolt 31 in the direction of locking the bar 2; this position is consequently the stable and stable position of the locking device 3 without interventions.
- the locking bolt 31 is also firmly connected to a handle 34, here by means of a connecting pin 34a (FIG. 3).
- the actuating spring 33 rests on the handle 34 on a further fixed bearing; for this purpose (FIG. 6)
- the handle 34 has a spring bearing 34b for the adjusting spring 33, which is designed as a cylindrical compression spring.
- the spring bearing 34b is designed as an axial cylindrical plunger, which also has an annular groove 34c on the face of the adjusting spring 33, into which the locking bolt 31 can be inserted axially; a transverse bore 34d (FIG. 6) made in this area serves to drive in the Connecting pin 34a.
- the locking bolt 31 can thus be moved with a grip piece 34e of the handle 34.
- the guide grooves 31a are angled at an acute angle to a short bend 31d at their end facing away from the handle 34. If the locking bolt 31 is retracted into its unlocked position by the handle 2 by means of the handle 34, it can be rotated somewhat so that the cross pin 32b comes into the region of the bends 31d. Under the influence of the actuating spring 33, this unlocking position is stable because the locking bolt 31 cannot “automatically” return to the axially parallel region of the guide groove 31a, but only with the help of the handle 34 after a brief movement counter to the action of the actuating spring 33 which the acute-angled gusset 31e (FIG. 5) formed by the bends 31d can be overcome.
- the conductor element 1 is (FIG. 2, 3) approximately U-shaped in cross section with a web 1a between two angled straps 1b.
- a guide bore 13 located in the web 1a of the conductor element 1 for the guide socket 32 has no closed circular cylindrical contour. Rather, its circumference is expanded radially by essentially rectangular holding recesses 14.
- the - in the exemplary embodiment four - holding recesses 14 (together with the surface pieces 15 which they enclose and which delimit the guide bores 13) form a counter flange G for a guide flange F which delimits the end of the guide stub 32 and which (FIG.
- the holding cams 32e are approximately congruent with the surface the holding recesses 14 in such a way that the guide flange F with its holding cams 32e can be easily pushed through the counter flange G with its holding recesses 14. It then lies against the inside of the web 1a, for example, against the counter flange G and can be rotated so that its holding cams 32e come out of the area of the holding recesses 14 and rest against the surface pieces 15. In this position, the bayonet lock F, G formed from the guide flange F and the counter flange G is locked.
- the guide flange f cannot reach as far through the counter flange G because its axial mobility in this direction is limited by an annular collar 32f in such a way that the mutually facing surfaces of the holding cams 32e and the surface pieces 15 are closely adjacent. In this way, the bayonet lock F, G can be realized with relatively little axial play, and the guide flange F remains spaced from the spar 2, so that it is freely movable against the conductor element 1 when the locking bolt 31 is detached from the rungs 22.
- the guide stub 32 is secured against radial rotation in a simple manner.
- a radial eyelet 32g is formed on the guide stub 32, which is provided with a first pin bore 32h which is axially parallel to the guide stub 32.
- a second pin hole in the web 1a is arranged such that a locking pin can be driven into the two pin holes when the bayonet lock F, G is rotated into its locking angular position. This means that the bayonet lock F, G cannot be released automatically. Nevertheless, the guide stub 32 can be easily changed or removed if necessary. List of reference signs
Landscapes
- Ladders (AREA)
- Programmable Controllers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29703876U DE29703876U1 (de) | 1997-03-04 | 1997-03-04 | Auszugsleiter |
DE29703876U | 1997-03-04 | ||
PCT/EP1998/000844 WO1998039546A1 (de) | 1997-03-04 | 1998-02-14 | Auszugsleiter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0964976A1 true EP0964976A1 (de) | 1999-12-22 |
EP0964976B1 EP0964976B1 (de) | 2003-07-30 |
Family
ID=8036908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98909464A Expired - Lifetime EP0964976B1 (de) | 1997-03-04 | 1998-02-14 | Auszugsleiter |
Country Status (8)
Country | Link |
---|---|
US (1) | US6220389B1 (de) |
EP (1) | EP0964976B1 (de) |
CA (1) | CA2280921A1 (de) |
DE (2) | DE29703876U1 (de) |
HU (1) | HUP0000876A3 (de) |
PL (1) | PL188664B1 (de) |
RO (1) | RO119155B1 (de) |
WO (1) | WO1998039546A1 (de) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6698550B2 (en) * | 2002-04-04 | 2004-03-02 | Vernon Crain | Adjustable step ladder |
US6866117B2 (en) * | 2002-04-05 | 2005-03-15 | Wing Enterprises, Inc. | Light weight ladder systems and methods |
US7424933B2 (en) * | 2002-05-28 | 2008-09-16 | Norman Miller | Ladder assemblies |
US6622822B1 (en) | 2002-08-01 | 2003-09-23 | Volvo Trucks North America, Inc. | Bunk ladder |
NZ540647A (en) | 2002-11-11 | 2008-10-31 | Wing Entpr | Combination ladders, ladder components and methods of manufacturing same |
US20050269159A1 (en) * | 2004-06-07 | 2005-12-08 | Lin Cho S | Telescopic stepladder |
US20060076190A1 (en) * | 2004-10-08 | 2006-04-13 | Vernon Crain | Step ladder |
US20060213721A1 (en) * | 2005-03-25 | 2006-09-28 | Mario Uttaro | Multiple laddering system - the ultimate foldaway system |
US8490747B2 (en) * | 2006-06-30 | 2013-07-23 | Werner Co. | Telescoping project tray |
NZ604842A (en) * | 2008-03-07 | 2015-01-30 | Wing Entpr Inc | Ladders, ladder components and related methods |
AU2013200666B2 (en) * | 2008-03-07 | 2015-07-02 | Wing Enterprises, Inc. | Ladders, ladder components and related methods |
US8464833B2 (en) * | 2010-10-05 | 2013-06-18 | Ge Lee | Adjustable hang ladder with fall arresting and cushioning arrangement |
CA2826167C (en) | 2011-02-22 | 2017-07-11 | Wing Enterprises, Incorporated | Ladders, ladder components and related methods |
EP2893116B1 (de) * | 2012-09-05 | 2017-07-19 | Branach Technology Pty Ltd | Verbesserte lösbare kupplung für einen leiterabschnitt und dergleichen |
US9404305B1 (en) * | 2014-03-26 | 2016-08-02 | Mark S. Messick | Portable and adaptable platform |
US9670726B2 (en) * | 2014-05-15 | 2017-06-06 | Kang-Shuo Yeh | Multi-purpose ladder with improved rungs |
CA3016664A1 (en) | 2016-03-04 | 2017-09-08 | Wing Enterprises, Incorporated | Adjustment mechanisms, ladders incorporating same and related methods |
US10900282B2 (en) * | 2016-12-21 | 2021-01-26 | James B. Ford | Safety ladder |
CN107178303A (zh) * | 2017-03-03 | 2017-09-19 | 厦门新技术集成有限公司 | 一种可变换直梯使用的人字梯 |
US10557227B2 (en) * | 2017-04-14 | 2020-02-11 | Whitmor, Inc. | Drying rack |
US20180363371A1 (en) * | 2017-06-20 | 2018-12-20 | Thomas Huckabay | Adjustable ladder device and method |
USD833643S1 (en) | 2017-07-07 | 2018-11-13 | Tricam Industries, Inc. | Integrated ladder tray hook |
US11851949B2 (en) * | 2018-01-30 | 2023-12-26 | Werner Co. | Multipurpose ladder and method |
US11280133B2 (en) * | 2018-01-30 | 2022-03-22 | Werner Co. | 7000 series aluminum alloy ladder, multipurpose ladder and method |
EP4239157A3 (de) * | 2018-06-08 | 2023-10-25 | Little Giant Ladder Systems, LLC | Kombinationsleitern, leiterkomponenten und entsprechende verfahren |
USD943772S1 (en) | 2018-10-19 | 2022-02-15 | Little Giant Ladder Systems, Llc | Flip-up ladder |
USD935054S1 (en) | 2018-10-19 | 2021-11-02 | Little Giant Ladder Systems, Llc | Ladder |
CN117967182A (zh) | 2018-12-13 | 2024-05-03 | 墨菲梯子有限公司 | 梯子 |
CA3127897A1 (en) | 2019-01-25 | 2020-07-30 | Little Giant Ladder Systems, Llc | Foot for ladders, ladders incorporating same and related methods |
USD908924S1 (en) * | 2019-05-14 | 2021-01-26 | Werner Co. | Multipurpose ladder |
USD935055S1 (en) | 2019-08-07 | 2021-11-02 | Tricam Industries, Inc. | Hinge for a multi-position ladder |
USD966556S1 (en) * | 2019-12-13 | 2022-10-11 | Murphy Ladder Llc | Ladder |
USD949438S1 (en) * | 2020-01-19 | 2022-04-19 | Aukey Technology Co., Ltd | Ladder |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3858684A (en) * | 1973-06-27 | 1975-01-07 | Harford E Goings | Telescoping ladder |
US4182431A (en) * | 1978-03-13 | 1980-01-08 | Little Giant Industries Inc. | Combination extension and step ladder rungs therefor |
FR2478550A1 (fr) * | 1980-03-21 | 1981-09-25 | Mecanismes Comp Ind De | Dispositif de montage d'une bras de support et d'articulation de pare-soleil de vehicule |
US4376470A (en) * | 1980-11-06 | 1983-03-15 | Little Giant Industries, Inc. | Fiberglass ladder |
US4371055A (en) * | 1980-11-07 | 1983-02-01 | Little Giant Industries, Inc. | Method of manufacturing a fiberglass ladder |
US4606432A (en) * | 1984-10-29 | 1986-08-19 | Belt Ned W | Adjustable ladder leg |
US4951780A (en) * | 1988-08-08 | 1990-08-28 | Kim Myung H | Combination ladder and height adjustable scaffold |
DE8814195U1 (de) * | 1988-11-12 | 1989-01-26 | Krause-Werk Gmbh & Co Kg, 6320 Alsfeld | Gelenkleiter |
US4854420A (en) * | 1988-11-15 | 1989-08-08 | Juang Yuan C | Securing means for a double step ladder |
BE1004040A6 (fr) * | 1989-06-16 | 1992-09-15 | Show Min Liaw | Echelle extensible a usages multiples. |
US5062499A (en) * | 1990-10-10 | 1991-11-05 | Tu Ching Chuan | Side rails fastening mechanism for telescopic aluminum step ladders |
KR940020881U (ko) | 1993-02-01 | 1994-09-17 | 유회관 | 사다리의 높낮이 조절장치 |
-
1997
- 1997-03-04 DE DE29703876U patent/DE29703876U1/de not_active Expired - Lifetime
-
1998
- 1998-02-14 PL PL98334064A patent/PL188664B1/pl unknown
- 1998-02-14 CA CA002280921A patent/CA2280921A1/en not_active Abandoned
- 1998-02-14 HU HU0000876A patent/HUP0000876A3/hu unknown
- 1998-02-14 RO RO99-00945A patent/RO119155B1/ro unknown
- 1998-02-14 US US09/355,677 patent/US6220389B1/en not_active Expired - Fee Related
- 1998-02-14 WO PCT/EP1998/000844 patent/WO1998039546A1/de not_active Application Discontinuation
- 1998-02-14 EP EP98909464A patent/EP0964976B1/de not_active Expired - Lifetime
- 1998-02-14 DE DE59809157T patent/DE59809157D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9839546A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6220389B1 (en) | 2001-04-24 |
DE29703876U1 (de) | 1998-07-02 |
RO119155B1 (ro) | 2004-04-30 |
WO1998039546A1 (de) | 1998-09-11 |
CA2280921A1 (en) | 1998-09-11 |
PL188664B1 (pl) | 2005-03-31 |
DE59809157D1 (de) | 2003-09-04 |
HUP0000876A2 (hu) | 2000-08-28 |
HUP0000876A3 (en) | 2003-12-29 |
PL334064A1 (en) | 2000-01-31 |
EP0964976B1 (de) | 2003-07-30 |
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